Volume-7 Issue-ICMSC17
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Volume-7 Issue-ICMSC17
International Conference on Modeling & Simulation in Civil Engineering (ICMSC)-2017 Date of Conference: December 13-15, 2017 | Organised by: TKM College of Engineering, Kollam (Kerala), India. |
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Volume-7, Issue- ICMSC17, December 2017, ISSN: 2249-8958 (Online) Published By: Blue Eyes Intelligence Engineering & Sciences Publication Pvt. Ltd. |
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1. |
Authors: |
Sabu N.J., Job Thomas | |
Paper Title: |
High Strength OPC Included Geopolymer Mortar Cured at Ambient Temperature | ||
Abstract: In order to eliminate the heat curing of the geopolymer mortar, a small amount of 6 to 12 percentage OPC by weight of total binder is included with fly ash which acts as main source of Si and Al for the geopolymerisation. The geopolymer mortar having strength up to 105.5 MPa was prepared in this study. A total of 81 mix proportions of geopolymer mortar is selected. The variables of the study are cement content, molarity of NaOH, ratio of sodium silicate (Na2 SiO3) to sodium hydroxide (NaOH) and alkali-binder ratio. The mortar specimens are tested for 7days and 28 days cube compressive strength. In this study, the prediction models are developed for compressive strength of geopolymer mortar cured at ambient temperature on 7days and 28 days. The prediction is found to be in good agreement with the experimental data. Keywords: Compressive Strength; Geopolymer; Ambient Curing; Fly Ash; OPC References:
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2. |
Authors: |
Nassif Nazeer Thaickavil, Job Thomas | |
Paper Title: |
Strength Correction Factor for H/T Ratio of Pressed Earth Brickwork Prisms | ||
Abstract: This paper presents the experimental study on the compressive strength of masonry prisms made using Pressed Earth Bricks and proposes strength correction factors to account for the slenderness of prisms. The compressive strength of masonry was determined by performing laboratory tests on masonry prism specimens. The variable considered in the experimental study is the height-to-thickness (h/t) ratio of prism specimen. A total of twelve brick masonry prism specimens were prepared and tested in four different configurations. Strength correction factors to account for the effects of h/t have been proposed based on a regression analysis. Keywords: Compressive Strength, h/t, Masonry Prism, Pressed Earth Bricks, Strength Correction Factors. References:
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3. |
Authors: |
Krishna Priya B.K., Jithin J.S. | |
Paper Title: |
Experimental Investigation on Strength and Durability Properties of Hybrid Fiber Reinforced Self Compacting Concrete | ||
Abstract: The development of Self Compacting Concrete (SCC) marks a consequential milestone in amending the product quality and efficiency of the building industry. SCC is the concrete for the present generation which is highly fluid in nature where no additional inner or outer vibration is necessary for the compaction of concrete. Several studies were conducted and revealed that fibers improve the structural properties of concrete like ductility, post crack resistance, energy absorption capacity etc. The addition of more than one type of fiber in self compacting concrete is known as Hybrid Fiber Reinforced Self Compacting Concrete (HFSCC). In this experimental work two different types of fibers are used, which are crimped steel fiber and alkali resistant glass fiber form HFSCC. Durability properties are enhanced by the use of alkali resistant glass fibers and the strength parameters are enhanced by the use of steel fibers. In the present work M50 grade of SCC was designed according to Nan Su method of mix design. The mechanical properties of SCC are tested at four different volume fractions of steel fiber content i.e., 0.25%, 0.5%, 0.75% and 1% and glass fiber content 0.05%, 0.1%, 0.15% and 0.2%. The parameters such as compressive strength, split tensile strength, flexural strength and modulus of elasticity was studied to determine strength characteristics. The parameters such as sorptivity, water absorption, acid attack, sulphate attack and sea water attack tests were studied to determine durability characteristics. From the present work, results show that the HFSCC with 0.5% steel and 0.1% glass fiber provide better strength characteristics as well as better durability characteristics compared to normal SCC. Keywords: Self Compacting Concrete, Fibers, Hybrid, Steel-Glass, Durability, Mechanical properties. References:
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4. |
Authors: |
Dhanya M.S., S. Jayasree | |
Paper Title: |
Strength and Behaviour of RC Beams with Corroded Reinforcement Retrofitted using High Strength Fiber Reinforced Cement Mortar | ||
Abstract: Corrosion on reinforcements in RC structures reduces the load carrying capacity of the structure. The present work investigates the degradation in the ultimate load carrying capacity of RC beams with corroded reinforcements and effect of high strength fiber reinforced cement mortar retrofitting in these beams. Twenty seven RC beams were prepared, out of which, three beams were kept as control specimens, and the remaining were subjected to varying levels of corrosion (5, 10 15 and 20%, 6 numbers in each group) by means of accelerated corrosion by the impressed current method using Faraday’s law. Preliminary studies were conducted in single bars and bars embedded in concrete (ie, in 6, 8, 10 mm diameter bars) to find the modification factor required in the time calculated for accelerated corrosion to include the concrete resistivity. Three beams from each group were distressed by applying 67% of the ultimate load carrying capacity of the respective corroded specimens. These beams were then retrofitted by means of high strength fiber reinforced cement mortar applied throughout the entire span. All the beams were tested for flexural strength under two point loading. The load-deflection characteristics, energy absorption capacity, stiffness, toughness, moment curvature relationship, ductility index, crack width, crack pattern, and ultimate load were then compared between corroded and control specimens, retrofitted and corroded specimens and retrofitted and control specimens from each group. Considerable enhancement in performance was observed in deteriorated beams due to retrofitting for beams up to 15% corrosion level. But the performances of beams with 20% corroded bars were not up to that of control specimens. Keywords: Accelerated corrosion method, Corrosion, Flexural behaviour, RC beams References:
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5. |
Authors: |
Imran H., Bindu Biju | |
Paper Title: |
Flexural Behaviour of High Performance Concrete Beams with Admixed Light Weight Aggregate using Metakaolin | ||
Abstract: According to ACI “High Performance Concrete is defined as concrete which meets special performance and uniformity requirements that cannot always be achieved routinely by using conventional materials and normal mixing, placing and curing practices”. Characteristics of high performance concrete include low permeability, stronger and denser transition zone between aggregate and cement paste in the concrete, as a result increases the abrasion resistance of concrete. Cement production induces around 5% of the total CO2 in the earth’s atmosphere. Metakaolin is not a by-product of an industrial process; it is manufactured for a specific purpose under carefully controlled conditions. It is a highly reactive, amorphous material with pozzolanic and latent hydraulic reactivity, suitable for use in cementing applications. About 80% of the weight of concrete is imparted by the coarse aggregate, by finding a light weight alternative for coarse aggregate helps attain reduced Seismic Forces, improved Structural Efficiency, reduces the dead load of a structure, smaller sections as well as smaller sized foundations can be used, formwork will have to withstand only low pressures, improved Constructability, ease of Transport, pumping to large distances, quick production, improved hydration due to internal curing, ease of Renovation and repair and better thermal insulation. One such material is sintagg or fly ash based light weight aggregate which is obtained from industrial by product. This study is intended to prepare a HPC mix for M70 grade with normal coarse aggregate and to replace the normal coarse aggregate with light weight aggregate (LWA) and to find the optimum partial replacement of cement with metakaolin from selected dosages. Then to compare the Hardened properties and durability properties of the optimum mixes and to study the flexural behavior of RC beams cast using the same. The study showed satisfactory results. Keywords: Lightweight aggregate, Metakaolin, RC beams, Flexural behavior References:
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6. |
Authors: |
Ansa Varghese, Arya Hari, Kavya Somanath, Surya Bhaskaran, Dhanya B.S | |
Paper Title: |
Influence of Super Plasticizers on M30 Grade Concrete | ||
Abstract: Chemical admixtures are used in concrete to improve many of the properties of concrete both in fresh and hardened state. Super plasticizers are high range water reducing admixtures used to enhance the workability of concrete. Many types of super plasticizers are available in the market. There is lack of clarity in the end customers on the type and the optimum dosage of the chemical admixtures and the property enhancement obtained from different types of super plasticizers. The objective of the present paper is to assess the influence of two types of super plasticizers (SNF and PCE based) on the properties of typical M30 grade concrete. The optimum dosages of the super plasticizers were determined using Marsh cone test and mini slump test. Study on the fresh, mechanical and durability properties of concretes were done along with cost estimation. The tests conducted include slump test, compaction factor test, cube compressive strength test, split tensile strength test and water permeability test (based on DIN 1048 Part 5). The test results show that the addition of super plasticizers can produce concrete with more durability and economy without compromising on the fresh and mechanical properties. Keywords: Super plasticizers, Optimum dosage, Durability, Cost estimation. References:
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7. |
Authors: |
Shefeena N, Amal Sheik, Aswathy Mariam Kurien, Farzana D, Fathima Mohammed, J John D’Cruz | |
Paper Title: |
Strength Studies on Copper slag and GGBS Modified Concrete | ||
Abstract: Over exploration of natural resources as the raw material for the construction industry is in an alarming state, especially in the case of cement and sand. Around the globe efforts are going on to reduce the usage of these natural resources in manufacturing of cement, by introducing new material or by partially replacing the existing material and in case of sand, by using alternate materials. One of the most sustainable ways to approach this issue is by the effective utilization of the waste material available in the region, especially from the industry. Copper slag and Ground granulated blast furnace sag (GGBS) are industrial by products produced from the process of manufacturing of copper and iron, which the Indian industry are looking for the effective disposal. In this study, copper slag and Ground granulated blast furnace sag (GGBS) are used to partial replacement of Sand and Cement respectively in a concrete mix of proportion 1:1.54:2.88 conforming to M30 grade concrete. Various percentages of replacement was adopted for the cement (0 to 20%) and Sand (0 to 40%). The test conducted in the specimens includes compressive, flexure and tensile strength. The test results proposes the optimum replacement level as 10% GGBS and 20% Copper slag. Keywords: Copper Slag, CGBS, Concrete References:
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8. |
Authors: |
S. Krishna Priya Rao, A. Suchith Reddy, P. Rathish Kumar | |
Paper Title: |
Strength and Durability Studies of RCA based Binary Blended Concrete | ||
Abstract: Construction waste has been dramatically increased in the last view decades causing environmental, social, and economical impacts directly or indirectly. To trade off these issues there is need for recycle, reuse and renew the construction/demolished waste materials to utilize and achieve sustainable construction. This study investigates the characteristic performance of Recycled Coarse Aggregates (RCA) with varying replacements (50%, 100%) of Natural Coarse Aggregates (NCA), and also to find the behavior of supplementary cementitious materials (SCM’s) like Fly ash (F) and Metakaolin (K) on RCA for M20, M30, M40 grades of concretes. The scope of the study is limited to partial replacements of cement by its weight with fly ash and metakaolin up to 20%, and the combination of both. The research determines the compressive and flexural strength aspects along with the durability of considered mixes by varying percentages of RCA and SCM’s. The present investigation mainly focused on durability of RCA and SCM’s incorporated concrete by conducting Rapid Chloride Permeability test. It is observed that performance characteristics of the mixes with partial replacement of the RCA blended with SCM’s has given better results for achieving sustainability. Keywords: Fly ash (F), Metakaolin (K), Partial replacement, Recycled Coarse Aggregates (RCA), Supplementary Cementitious Materials (SCM's), Sustainable concrete. References:
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9. |
Authors: |
Shameena M, Mohamed Asim M. | |
Paper Title: |
Analysing Factors Affecting Schedule Performance of Bridge Construction Projects | ||
Abstract: Infrastructure bridge projects involve complex processes, which require close cooperation and coordination among the stakeholders. This paper presents the results of a survey undertaken to determine and evaluate the relative importance of the significant factors causing delays in Bridge construction projects in Kerala in view of key stake holders namely clients, consultants and contractors. A questionnaire and personal interviews have formed the basis of this study. 73 attributes which are identified through survey were grouped into seven major categories by factor analysis using SPSS software. Factors identified are1) Insufficient site management and planning of contractor2) Delays in Govt. procedures and solving problems arises 3) Improper planning of the project 4) Lack of communication 5) Public interferences 6) Financial constraints of clients 7) Variations in Weather conditions. It is hoped that the significant delay factors identified in this survey will provide a basis for strategies to minimize delays and will also be incorporated into a ‘construction time’ forecasting model for future research programme. Keywords: Attributes, Factors, Infrastructure construction, Stake holders. References:
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10. |
Authors: |
Hajara K. M., Anu V. Thomas | |
Paper Title: |
Factors Affecting Success of a Construction Project | ||
Abstract: The success of a construction project is in completing the project on time with sufficient quality and within the assigned budget. But often, a project may fail with respect to any of the above goals and cannot be considered as a successful one. A number of variables influence the success of a project. The aim of this study is to analyze these factors and rank them according to their level of influence on the project success. The different factors are rated based on the results obtained by conducting a questionnaire survey among a panel of experts. Since the factors affecting the success of a project are subjective in nature, the most suitable method to analyze and rank them is Analytic Hierarchy Process (AHP). AHP provides a proven, mathematical technique to deal with complex decision making and aids in quantifying various opinions, analyzing the data collected and accelerating the decision-making process. The consistency of the judgments made can be verified in this method. Forty two factors identified from the literature survey were condensed to 10 factors based on frequency of occurrence. A questionnaire survey based on these factors was done and the results were analyzed by using AHP. Accurate schedule and plan (19.913%), timely assessment and allocation of resources other than materials (16.463%), cash flow of project (15.215%) and availability of materials (11.985%) were found to be the most significant factors influencing project success. Keywords: Analytic Hierarchy Process, Comparison Matrix, Consistency Index, Success Factors. References:
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11. |
Authors: |
Sanya Sathyan Chakkalakal, Mohamed Asim | |
Paper Title: |
Influence of External Stakeholders on Project Time Overrun- A Case Study at Kochi Metro Rail Limited | ||
Abstract: Projects experience extensive delays which consecutively results in an increase in estimated cost. Current constructions are implemented in highly demanding and complex built environments where projects are executed by coalitions of multiple stakeholders that have divergent interests, objectives, and socio-cultural back-grounds. Construction projects face challenges in not only identifying and managing stakeholders but also satisfying their requirements. Interest in stakeholders has grown considerably since Freeman‟s (1984) seminal work “Strategic Management: A Stakeholder Approach “was published. The interactions and interrelationships between stakeholders largely determine the overall performance of a construction project. An important component of stakeholder management is stakeholder analysis. Considering the profuse impact of external stakeholders on Kochi Metro Project a case study has been conducted at Kochi, under the company “Kochi Metro Rail Limited”, undertaking the work of Kochi Metro. There are essentially two categories of stakeholders: internal, who are those actively involved in project execution; and external, who are those affected by the project. The main objective was to carry out External Stakeholder Analysis, and to identify the key stakeholders who will be responsible for the successful outcome of the project and also to identify the stakeholders who can be threats to the company on the basis of their power and influence level and Pareto Analysis has been used to identify the various factors that cause delay. The proposed analysis was able to indicate the factors that causes 80 percentage of the delay and also to find out the stakeholder groups that influence the project schedule. Keywords: Stakeholders Prioritizations, Power Influence Method, Key Stakeholders, Pareto Analysis. References:
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12. |
Authors: |
Amina A, Preeja Prameelan | |
Paper Title: |
Quality Assessment of Different Soft Drinks | ||
Abstract: Many youngsters today are addicted to the cool refreshing beverages, the soft drinks. Recently Soft drink brands have been put into various questions regarding their purity. News flashed that they contain harmful pesticides and heavy metals which increased the interest in knowing more about soft drinks. Soft Drinks Impact on Health is getting adverse day by day. To determine the characteristics of soft drinks, nine popular brands of soft drinks were collected from local market in Kollam & qualitative analysis was carried. The analysis included different tests carried in environmental lab viz. pH, Acidity, Dissolved Oxygen, Chlorides, hardness, Electrical conductivity, Chemical Oxygen Demand (COD) & Total Dissolved Solids (TDS). Analysis of heavy metal (Pb) and pesticide (DDT) were also done. Anti-microbial test on different soft drinks are also carried out, which had no negative impact. It has been noticed that most of the soft drinks exceeds drinking water standards given by BIS. pH in the soft drinks ranged from 2.75-5. Maximum acidity is observed in Cococola (295mg/L). Among 9 soft drinks, 5 of them are of having chloride beyond permissible limit as per BIS (250mg/L). 2 out of 9 samples collected exceeded acceptable limits of hardness. Hence soft drinks are not beneficial for health. Drinking soft drinks regularly really is slow poisoning. The over-consumption of sugar sweetened soft drinks is associated with obesity, diabetes, dental caries, kidney stones and low nutrient levels. The aim of this study was to make others to be aware about bad effects of soft drinks on human health to people especially to youths. Keywords: Soft drink, qualitative analysis, drinking water standards References:
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13. |
Authors: |
Erfana.N, Anu.N | |
Paper Title: |
Green Synthesis of Iron Nanoparticles using Ixora Cultivars for the Removal of Nitrate from Wastewater | ||
Abstract: One of the most challenging ecological problems the world facing is waste management. Serious discussions are going around in the world to find out and to establish proper and efficient methods of waste disposal. Interest in developing environmentally benign procedures for the synthesis of metallic nanoparticles has been increased. The exploitation of different biomaterials for the synthesis of nanoparticles is considered a valuable approach in green nanotechnology. Biological resources such as bacteria, algae fungi and plants have been used for the production of low-cost, energy-efficient, and nontoxic environmental friendly metallic nanoparticles. The present study is to evaluate the efficacy of Fe-NPs synthesized from the leaf extracts in removing nitrate from wastewater. Leaf extracts were chosen based on the presence of polyphenols and the extracts used in the present study was Ixora Cultivaras (Common Name: Thetti) which are abundantly available in India. Characterization study was done by using Fourier Transform Infrared Spectroscopy. Ixora Cultivars showed 61% nitrate removal. Overall performance showed satisfactory results. Keywords: Green synthesis, Fe-NPs, Ixora Cultivars leaf, Characterization. References:
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14. |
Authors: |
Leena Jose, Sruthy S A, Ahasan Mohammed M A, Athul M S, Meera S Nair, Mini S Nair | |
Paper Title: |
Water Quality Modeling of Vellayani Lake | ||
Abstract: The surface waters are highly polluted by industrial, agricultural and other anthropogenic activities. To protect and maintain the physical, chemical and biological integrity of water, water quality assessment is very important. In this study, water quality index (WQI) by improved aggregate method was used to study the water quality of Vellayani Lake, largest freshwater lake in Thiruvananthapuram. A multilinear regression model was prepared for predicting WQI from different water quality parameters. The improved aggregate WQI shows that water is of poor quality and objectionable for drinking purposes. The multilinear regression model for WQI has obtained high coefficient of determination (R2) which shows that the model has high prediction capacity. Keywords: Water quality index, improved aggregate method, multilinear regression, coefficient of determination. References:
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15. |
Authors: |
Shabina AR, Sruthi M, Dhanyalekshmi CS | |
Paper Title: |
Microbial Conversion of Organic Fraction of Hotel Waste into Biofertilizer using Modern Technology | ||
Abstract: Food waste generation and management is a serious burden in the environment. Food waste represents almost 60% of the total solid waste dumped at landfill. Globally food waste accounts for 6-10% of greenhouse gas emission. Due to insufficient space and improper treatment technologies, food waste were dumping on open areas thereby it creates many environmental problems. Ground water, contamination, emission of carbon-dioxide, methane, leachate problems are the main factors causing due to its disposal in landfills. This study is conducted for the microbial conversion of organic fraction of hotel waste into fertilizer using modern technology. For that, raw vegetable and food waste were collected from nearby hotel which was subjected to physical and chemical characteristic study. Then different sets of optimization study was conducted using crushed vegetable and food waste in (1:4) proportion to identify better fertiliser in colour, odour and texture. From the optimization study, best proportion of fertilizer was identified (vw:fw+coirpith+sawdust) which was operated at 60°C and used for the scale up study in reactor. Reactor is a new technology which was made of stainless steel provided with heat gun and grinding blades operate at 230V power supply. Experiment was conducted in reactor and fertilizer was produced within 1hr. This fertilizer was mixed with a carrier based bioculum for the production of an effective biofertiliser. Carrier based bioculum was produced by the isolation of Nitrogen fixing, Phosphorous Solubilising and Potassium Solubilizing bacterias from three different sources. Then there strains were produced in respective media and finally mixed with a carrier material like soil. Using the obtained fertilisr and bioculum, seed germination and field level studies were conducted to identify the efficiency. From the NPK analysis, it was confirmed that it was a good biofertiliser of high nutrity value. Keywords: Biofertilzer, bioculum, food waste, vegetable waste References:
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16. |
Authors: |
Duithy George, Divya Raj S. | |
Paper Title: |
Correlation Study and Regression Analysis of Water Quality in Kallada River, Kollam | ||
Abstract: Kallada is a westward flowing river in Kollam district with 130 Kms of length. It is necessary that the quality of river water should be checked at regular time interval as it is used as drinking water. Correlation and regression study is a statistical process for estimating the relationship among variables. It includes many techniques for modelling and analyzing several variables. An important tool used for correlation and regression study is R software. Here in this study R software is used with Karl–Pearson’s correlation equation. It is widely used for assessing the physico–chemical characteristics of river water and provides an excellent tool for the prediction of parameter values within reasonable degree of accuracy. Thirteen water quality parameters of river water from three sites were estimated for consecutive seven weeks following standard methods and procedure of sampling and estimation. As the river flows downstream the pollutant concentration increases. It may be due to the high density of population and location of ancillary industrial units in this area. Comparison of estimated values with WHO, USPH, and BIS standards revealed that the study area is less polluted. In this study area positive correlation is obtained between 82 unions that are 90% of total number. Rest of the 9 union demonstrates negative correlation, which is 10% of the total number. Keywords: Correlation, Kallada River, Physico-chemical Parameters, Regression. References:
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17. |
Authors: |
Fathima A, Sukanya S Nair | |
Paper Title: |
River Water Quality Assessment using Pollution Index | ||
Abstract: A rapid interpretation of river water quality is a compulsory since river is a dynamic ecosystem, influenced by various activities in the river bank. Rivers are the main mode to carry or disposal municipal wastewater, industrial waste water, solid waste and runoff water from agricultural field, road that is the major reason of river water pollution. River water gets polluted at some points due to anthropogenic activities, confluence of sewage, domestic waste, and disposal of solid waste. So it is necessary to monitor the water quality of river water by pollution index. For the determination of pollution index, the river water sample which was collected from two river namely river Pallickal in kollam district and Parvathy Puthanar in Trivandrum district.From the river pallickal, sample was collected from five points such as champakadav, malumeal, karurkadav and thodiyoor. From the river Parvathy Puthanar ,water sample is collected from four points such as Karali junction , air india nagar, chaka manalveedu and pallithoppu. The physico-chemical analysis and bacteriological analysis were done, pH, electrical conductivity, total dissolved solids, alkalinity, total hardness, sulphate, nitrate, chloride, turbidity, phosphate , dissolved oxygen , BOD, MPN, COD are done. The pollution index of river Pallickal ranges from 1.02-1.6 and determined the river is lightly polluted. Then the pollution index of Parvathy Puthanar ranges from 5.22-5.45 and determined that river is moderately polluted. Keywords: Pollution index, physico-chemical analysis, bacteriological analysis References:
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18. |
Authors: |
Lekshmi S, K. Mophin Kani | |
Paper Title: |
Assessment of Seawater Intrusion using Chemical Indicators | ||
Abstract: Groundwater is an essential and vital component for any life supporting system. It is not only the basic need for human existence but also a vital input for all developmental activities. Groundwater chemistry is of great interest in coastal regions due to the varying degree of mixing of groundwater with seawater. Present study focuses mainly on the seawater intrusion vulnerability, confined to the coastal belt of Kollam district, which lies in the coastal belt area of Kerala. The physicochemical parameters of about 20 well samples, within 5 km radius were analysed. Based on the results, all the sites within the radius are at the midst of intrusion. Assessment of chemical indicators namely Ca enrichment ratio (within the limits 1.39-28.61), Cl- / (HCO3+CO3) ratio (about 3 sites have values less than 5, for other sites value range between 0.519-1.499), BEX indices (salinization ranges from -1.191 to -0.49, freshening ranges from 0.28 to 1.35), Na+ / Cl- ratio (within limits 0.09-0.79) helped to identify the wells which are indicating with seawater intrusion. SAR ratio (within limits 3.094-7.208) within the region also confirms that the area had a chance of totally getting intruded in the near future. Alkaline earth metals with increased portion of alkali with prevailing Cl- ions were the dominant water type in the study area. Plotting using piper diagram also indicates that the study area presently at the level of mixing zone. Keywords: Chemical indicators, Physicochemical parameters, Seawater intrusion, Statistical tools. References:
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19. |
Authors: |
Vibhoosha M. P., Anjana Bhasi | |
Paper Title: |
Settlement Behaviour of Embankments Supported By Columnar Structures | ||
Abstract: Use of columns is an ideal technique for flexible structures such as embankments and storage tanks due to their higher strength and stiffness compared to the surrounding soft soil by means of which columns sustain larger proportion of the applied load. Being highly permeable, stone columns provide good drainage for pore water dissipation which accelerates the consolidation settlement in clayey soils and they are therefore commonly used in India. Another technique that is popular in European countries is the use of plain concrete piles as columnar materials with geosynthetic as basal reinforcement. In this paper, finite element based numerical analyses has been carried out to study the settlement behavior of embankments supported by different type of columnar structures such as stone columns, encased stone columns and geosynthetic reinforced piles with consolidation. Keywords: Embankment, Settlement, Stone column, Geosynthetic, Pile References:
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20. |
Authors: |
S. Anaswara, Amrita, R. Shivashankar | |
Paper Title: |
Numerical Analysis on Interference of Strip Footings on Soils | ||
Abstract: The primary function of foundation of a structure, is to safely transfer the loads from the superstructure to the soil beneath without occurrence of shear failure and without excessive settlements. Due to rapid urbanization, very often structures and their foundations are built close to each other. This numerical study looks into the interference effects between two adjacent strip footings that are rigid and perfectly rough at their bottom. Two types of foundation soils, namely clays and sands, are being considered. A finite element based software-PLAXIS 2D is being used. The parameters varied in this study are the width of footing and clear distance between the two adjacent rigid strip footings. The soil is assumed to behave as linear elastic material under a range of static foundation loads. From the numerical analysis, it is observed that the interference effects in terms of settlements and bearing stresses beneath the footings are more when the footings are at closer spacing, both in case of clay and sand, and vice versa. When the spacing to foundation width (S/B) ratio is 0.5, the settlements beneath the footings are more than doubled, and vertical stresses beneath footing are increased by 17 to 50%, compared to that of an isolated footing. Interference effects are found to be negligible when the spacing between the footings is five times the width of the footing when the foundation settlements become almost equal to that of a single strip footing on soil. Keywords: bearing capacity, interference effect, numerical analysis, settlements. References:
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21. |
Authors: |
Tiju Susan Thomas, Sindhu A.R. | |
Paper Title: |
Regression Modelling for Prediction of Pore Size Distribution of Clayey Soil from Permeability and Compaction Characteristics | ||
Abstract: The arrangement of primary soil particles and its aggregation forms the soil structure. Based on pore size, the porous structure of soil can be classified into small pores located within aggregates and large pores located between aggregates. Micro-pore structure is highly influential for very fine soil in its engineering properties. Permeability and compaction characteristics of soil are greatly influenced by the pore structure or pore size distribution. With chemical modification of soil and other ground improvement techniques at microscopic level gaining importance, there is relevance in studying the effect of micro pore structure on soil properties particularly in problematic soil like Kuttanad clay. Also, correlation equations could eliminate the need for highly sophisticated instrument and save time. The aim of this study is to investigate the effect of micro pore structure properties on permeability and compaction characteristics of clayey soil. It involves determination of permeability, Standard Proctor characteristics, determination of pore size distribution and pore volume of soil samples collected from Kuttanad region by adopting BJH analysis. The relationship between the parameters is investigated and an attempt is done to obtain the equation involving the parameters by linear regression. The results from the study show that relation exists between the parameters. Keywords: Compaction, Micro Pore, Permeability, Porosity, Regression Analysis. References:
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22. |
Authors: |
Rekha Ambi, Jayasree P.K., Unnikrishnan N. | |
Paper Title: |
Experimental Investigations on Combined Loaded Finned Piles in Sand | ||
Abstract: Piles are supposed to withstand large lateral loads such as wind – earthquake loads, beyond the imposed vertical loads in all types of structures like multistoreyed buildings, bridge abutments, retaining walls . Finned pile is a developing form of pile foundation that is capable of withstanding large lateral translations. In this study an effort is made to quantify the improvement in lateral load carrying capacity of a piles with fins attached close to the pile head, when subjected to combined loading. Small-scale laboratory model tests were performed on normal piles (without fins) and also with finned piles. These piles were embedded in sand. The studies were carried out by varying the geometric factors such as length and width of the fins and also the type of pile. Reviews show that if the fins are provided close to the pile head then there is a significant increase in lateral resistance capacity of the piles. The increase in lateral resistance capacity gained by attaching fins on a pile varies with dimension of the fins as well as the type of pile. Short open ended and closed ended piles are used for the experimental work. On the basis of the laboratory model test results, optimum dimension of the fin for maximum improvement are recommended. The trend showed in the results were similar with those stated in the literature as on studies with lateral load alone. Keywords: Combined loading, fin piles, Lateral displacement, model tests, sand. References:
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23. |
Authors: |
Fathima S, Jisha S. V, Jayalekshmi B. R | |
Paper Title: |
Seismic Analysis of Industrial Chimneys Considering the Flexibility of Soil | ||
Abstract: Conventionally, the chimney structures are analysed with the fixed base condition, although in reality, the structural response of the chimney varies according to the rigidity of structure, nature of foundation and stiffness of supporting soil, especially under the seismic ground motions. Hence, it is important to account for soil-structure interaction (SSI) in the analysis of chimney structure, under seismic conditions. In this present study, the seismic response of the tall RCC chimneys of heights 75 m, 150 m and 300 m considering flexibility of soil were analysed. Equivalent static method as per IS 1893 (Part 4) 2005 was used to analyse the three dimensional finite element analysis of integrated chimney - foundation –soil systems. The responses are obtained for different supporting soil strata (loose sand to rock). Free vibration analysis was also done. Tip deflection of chimneys and tangential and radial moments of chimney shells are computed from SSI analysis and compared that with conventional analysis. Keywords: equivalent static method, free vibration, seismic ground motion, soil-structure interaction. References:
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24. |
Authors: |
Radhika. M. Patel, B. R. Jayalekshmi, R. Shivashankar | |
Paper Title: |
Finite Element Analysis of Geogrid Reinforced Pile Supported Embankment Considering the Effect of Pile Length | ||
Abstract: In places where there are soft and compressible soils for considerable depths, bridge approach embankments very often rest directly on the untreated soft ground, while the bridge structure itself rest on hard foundation or on deep foundations that transfer loads to the hard and unyielding strata. Also in such places, the water table could be high, because of which the soils will have low shear strength. Due to self weight and traffic loads on the embankment, the road embankment will sink considerably, causing huge differential settlements at the junction of the bridge deck and the approach embankments on either side of the bridges. This will cause an uneasy bump and discomfort for the passengers. To overcome this problem geogrid reinforced pile supported embankment is a suitable solution. A 3-Dimensional finite element analysis of geogrid reinforced pile supported embankment having crest width of 20 m, height above ground of 5 m, with side slopes of 1.5H:1V consisting of sandy silt backfill, overlying a soft clay deposit of 25 m thickness is carried out. Variable head diameter piles having 1 m head diameter and 400 mm shaft diameter and varying pile spacing and length are being considered. Settlement variations across the embankment and foundation soil, settlement at ground level, vertical stress distribution due to traffic load along with the weight of embankment are being studied. From the analysis it is seen that end bearing piles are very much effective in reducing total and differential settlements even at 4D spacing. Also very less negative skin friction values at the pile head were seen but at the pile toe higher values of positive skin friction were seen hence while designing the variable head piles for supporting the embankment, positive skin friction at the toe should be taken care. Keywords: Bridge Approach Embankments, Finite Element Method, Geogrid Reinforcement, Variable Head Diameter Piles. References:
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25. |
Authors: |
Paloma Pineda | |
Paper Title: |
Technical Keynote Numerical Modelling and Analysis of Brittle Masonry Structures in Seismic Areas. Considerations on the Model and the Environmental Factor | ||
Abstract: The dynamic assessment of brittle masonry structures located in seismic areas by means of numerical methods is a complex task, as it is necessary to overcome several uncertainties and difficulties (e.g. the selection of reliable constitutive models, the use of the most adequate numerical method, the role of stiffness degradation or the cracking and crushing evolution). In addition, the environmental impact of structural materials, types, and works, should be added to the assessment model to improve sustainability. In this paper are analysed the weaknesses and strengths of different nonlinear numerical approaches, evaluating the suitability, accuracy and limitations of each analysis (from static and modal to pushover and transient nonlinear). Considerations on the environmental issues that should be included in the numerical analyses are also provided. The challenge is twofold, to improve the structural safety and to reduce the negative environmental effects by means of numerical models. Keywords: Numerical Model; Seismic Assessment; Eco-efficient Structures; Non-linear Analyses; Brittle Structures. References:
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26. |
Authors: |
Chithu Babu, Chinsu Mereena Joy, Althaf M | |
Paper Title: |
Analysis of Effect of Crack on Natural Frequencies of a Cantilever Beam Experimentally and Numerically using ANSYS 16.0 | ||
Abstract: Beams are of great importance in construction industries as well as in different engineering application. When a beam undergoes different types of loading, crack may develop in beam and may lead to the failure of the structure. Crack changes the physical and dynamic properties like stiffness and natural frequencies of beam which are function of crack depth and crack location. In this study vibration analysis of steel cantilever beam has been done under damaged and undamaged condition to obtain the effect of crack depth, crack location etc on natural frequency. Numerical analysis of beam is done through finite element analysis of beam using ANSYS software. Vibration analysis of beam has been also done through experimentation and results are compared with numerical analysis and it hold well. Different crack locations with single crack are considered in this paper. Keywords: Natural Frequency, Beam, Crack, Vibration, Finite Element Method. References:
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27. |
Authors: |
Sujeesh S., Shemin T. John | |
Paper Title: |
Enhancement of Seismic Performance of Soft Storeyed Building | ||
Abstract: High rise structures are becoming a trending fashion of construction field. In the last few decades the rate of growth in vertical structures has been increased drastically. Open ground storey structures is one of the development in high rise structures to avoid the dilemma of parking of vehicles. Response of these structures, during earthquake is one of the leading problem faced by the structural engineers. The soft story and weak storey effect causes catastrophic failure in these system during seismic ground motion. Since the rate of occurrences of earthquakes has been increased at a greater range, there is a wide call over the globe for an efficient lateral load resisting system and to enhance the seismic performance of the soft storey. In this work, a combination of conventional lateral load resisting system such as X-bracings and multiplication factor is implemented along with moment resisting frame to develop a hybrid system, to improve the seismic performance of soft storey structures. The performance of the structure is assessed by means of linear static analysis. Keywords: Analysis, multiplication factor, soft storey, x-bracing. References:
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28. |
Authors: |
Jomy Joseph Peedikayil, Tom George | |
Paper Title: |
Torsional Behaviour of Steel Fiber Reinforced Concrete Beam | ||
Abstract: Structural components can fail due to severe torsional effects, particularly in vertical resisting components where torsion in the horizontal plane greatly amplifies seismic effects. Torsion of structural members and the behaviour of steel fiber reinforced concrete became the area of interest of many researchers in the past and it is still newsworthy. In this study torsional behaviour of steel fiber reinforced concrete beams was examined. Torque versus angle of twist response of each specimen was monitored during the experiments, and the effect of steel fiber was studied. It was seen that the addition of steel fiber had a significant effect on the torque and angle of twists. The first cracks are observed at the middle of the face along the depth of the beam. Next cracks are observed at the middle of the face along the breadth of the beam. After the cracks connect, they circulate along the periphery of the beam. The effect of the inclusion and variation of steel fiber is studied experimentally. Keywords: Angle of twist, Spiral cracks, Steel fiber, Torsion References:
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29. |
Authors: |
Adarsh V. S., Akhil Raj S. R. | |
Paper Title: |
Effect of Ferrocement Confinement on Behaviour of Exterior Beam-Column Joints | ||
Abstract: Beam-Column Joint is the portion of column where a beam is used to join. These joints are the most critical portions of a Reinforced Concrete Moment Resisting Framed structures (MRF) because, the loads from adjacent beams and columns are transferred through the joint. Joints have no problem when it is subjected to dead load and live load only, but when it is subjected to seismic load the condition will be different and large forces and moments will be developed at the joint. If a joint is found to be stressed or deteriorated it should be retrofitted by suitable methods before failure. There are different retrofitting methods by using different materials such as CFRP, GFRP, steel cages and ferrocement. Among them Ferrocement wrapping have various advantages such as easy moulding property, easy availability, economy, requirement of less skilled labour, good tensile strength etc. So in this work effect of ferrocement on exterior beam-column joint as a technique of retrofitting by varying the type of mortar mixes was studied. The mortar mixes adopted for the study were normal and high performance mortar. In each mortar type two different volume fractions of wiremesh also considered (1.2 and 1.8%) for the study. All the control and retrofitted specimens tested under reverse cyclic loading condition using 1000 kN capacity loading frame. The performance of joints was compared based on the parameters such as Crack pattern, energy absorption, first crack load and ultimate load, Displacement ductility factor and stiffness degradation. The study indicates that all these parameters were improved significantly for retrofitted specimens with normal mortar and the properties can be improved further by using high performance mortar as compared to control specimens. Keywords: Beam-column joints, Ferrocement, Retrofitting. References:
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30. |
Authors: |
Yashvanth P, Premanand Shenoy, C.M. Ravi Kumar | |
Paper Title: |
Torsional Effects in Multi Storey Buildings due to Earthquake Loads | ||
Abstract: Most often significant damages are caused by torsional motions of buildings according to damage reports on earthquake. It is emphasized and proven with this current study that, it is highly essential to carry out the torsional effects for Lateral forces. Occupational outlining, compulsion of distinctive users and arrangement of concealed RCC skeletons make most of the buildings having centre of mass and centre of stiffness far apart. This leads to the demand of considerable torsional resistance of the multi-storey buildings during active ground dynamics. This paper presents the concise study carried out on the torsional effect in a multi-storeyed building and the resulting consequences on the design of beams and columns. The results obtained show that the corner columns and beams of buildings are severely affected due to the which , buildings that are not symmetric in geometry or and the effect of torsion is greater in the corner beams and columns as compared to the interior columns and beams. Therefore it is essential that buildings which are not symmetric in geometry should be analysed for torsional effect. The Indian Standard code of practice IS1893: (Part 1–2002) is used for guidelines and methodology. Keywords: Asymmetrical building, Eccentricity, Lateral forces, Torsional effect. References:
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31. |
Authors: |
Divya B. Mathew, J Vijaya Vengadesh Kumar, M. Nazeer | |
Paper Title: |
Review on Lateral Torsional Buckling of Monosymmetric Beams | ||
Abstract: Lateral Torsional Buckling (LTB) is a stability failure criterion for beams subjected to transverse bending. The American Institute of Steel Construction (AISC) defines Lateral Torsional Buckling as: the buckling mode of a flexural member involving deflection normal to the plane of bending occurring simultaneously with twist about the shear centre of the cross-section. The buckling of members with monosymmetric cross-sections is an underdeveloped topic and also the steel structure industries mostly use mono-symmetric sections (Channel, Tee and equal legged angle, I section with unequal flanges) rather than doubly symmetric sections (I and box sections). IS:800-2007 does not deal with torsion problems explicitly. The lateral torsional buckling equations in design codes are developed using the experimental evident of doubly symmetric I sections and it is used for mono-symmetric section with modifications. The resistance against warping can increase the buckling resistance but in the same time it also increases the stress values. The additional stresses developed along the axial direction due to warping effect have to be included in the combined stress check. For these reasons, detailed study on torsional effects in the view of design equations is important. In this paper, the literature available on IS 800, lateral torsional buckling of doubly symmetric and monosymmetric steel sections are reviewed. Keywords: Lateral Torsional Buckling, Monosymmetric beams. References:
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32. |
Authors: |
Mohan Lal Chowdary | |
Paper Title: |
Application of Artificial Neural Networks for Design of RCC Rectangular Short Columns Subjected to Biaxial Bending | ||
Abstract: The objective of the present work is to apply backpropagation artificial neural network (ANN) to predict the design of the Reinforced Cement Concrete (RCC) rectangular short columns subjected to biaxial bending. The research carried out demonstrates the utility of the backpropagation neural networks in modeling the non-linear relationship between different input variables associated in the design of RCC short columns and the area of longitudinal reinforcement as the output. About 100 data sets for the simulation were obtained from a Civil Engineering design software package. Out of the 100 data sets, 70 sets are used for training, 15 sets for validation and the remaining 15 sets are used for testing. The training of neural networks has been carried out using Levenberg-Marquardt algorithm, Bayesian Regularization algorithm and Scaled Conjugate Gradient algorithms available in ANN-tool box of MATLAB software. The results presented demonstrates that once the artificial neural networks are trained, they are useful in predicting the design of RCC rectangular columns subjected to biaxial bending. In addition, the routine design checks of the columns can also be performed using the well trained and tested neural networks. Keywords: Columns, Design, Neural Networks, Training Algorithms. References:
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33. |
Authors: |
Yamuna S R, Parvathy U. | |
Paper Title: |
Linear Static Analysis of Outrigger Structural System Subjected to Lateral Loading | ||
Abstract: High rise buildings have been rapidly increasing worldwide. The structural efficiency of high rise buildings mainly depends on the lateral stiffness and resistance capacity. The outrigger systems are used to increase the stiffness of buildings and to reduce their drift and deflection so that during lateral load, the risk of structural and non – structural damage gets minimized. In this paper the performance of outrigger structural system in high rise building subjected to seismic load has been studied and the optimum location of the outrigger system in a high rise steel building has been obtained by conducting a linear static analysis on different outrigger braced systems. The seismic performance was assessed in terms of storey displacement by considering different bracing systems such as 'x' brace, inverted 'v' brace and diagonal brace. It was observed that the position of outriggers, lateral load and height of structure significantly influences the seismic performance of the high rise building. Keywords: Bracings, Finite element modeling, Outrigger system, Storey displacement References:
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34. |
Authors: |
Babitha Benjamin, Mohamed Asim | |
Paper Title: |
A Comparative Study on Flexural Strength of Recycled Aggregate Bacterial Concrete Slabs | ||
Abstract: At the beginning of 21st century one of the greatest problem in concrete, that is formation of micro cracks has been solved by introducing calcite precipitating bacteria in concrete, thus giving a new name and phase to concrete (self-healing bacterial concrete). Crack healing is not just the only benefit obtained from bacterial concrete it also increases both compressive strength (up to 40 %) as well as durability due to dense packing obtained from calcite precipitate between pours by bacteria (any calcite precipitating bacteria which is commonly found, grows in extreme conductions and non-pathogenic can be used). Each year tons of waste materials are produced and dumped into landfills due to demolishing of old structures for vertical extension and renovation, which is not sustainable. Many research workers as of now have successfully recycled this demolished waste effectively as fine and coarse aggregates, but there is always a reduction in compressive strength observed due to weak bonding because of the presence of old cement mortar paste, this cutback in strength can be wiped out using bacterial concrete. This paper is all about using recycled aggregate obtained from demolished waste as coarse aggregate in concrete and adding Bacillus Subtilis (a calcite precipitating bacteria) to this, so that it reduce or nullify the reduction in compressive strength and stiffness of concrete due to the use of recycled aggregate, thus improving the quality of recycled aggregate concrete and making the concrete more sustainable and environment friendly. The flexural tested slabs showed improved flexural strength for recycled aggregate bacterial concrete slabs (up to 20 %) than normal concrete slabs and recycled aggregate concrete slabs. Keywords: Bacterial concrete, Flexural strength, Recycled aggregate References:
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35. |
Authors: |
Nissin Ann Mathew, Katta Venkataramana | |
Paper Title: |
Earthquake Response of Structures with Sliding Base Isolation | ||
Abstract: Base isolation of structures is different from conventional aseismic designs where importance is given to enhanced structural resistance (by means of shear walls, braced frames, moment resistant frames etc). Base isolation involves the introduction of an isolator between the structure and the foundation. The isolator is characterized by very low horizontal stiffness but high vertical stiffness. This feature ensures that the building remains stable under vertical load and yet is capable of motion when subjected to lateral loads. This decoupling of the structure from the foundation, results in the non-transmission of forces into the structure, thus rendering it seismic resistant. In this study sliding isolator is used to decouple the structure from the foundation. RC multistory buildings with and without isolators are analyzed and compared so as to figure out the effectiveness in reduction of relevant seismic properties. Time History analysis and response spectrum analysis is done. Bhuj earthquake acceleration data has been used for the Time History Analysis and response spectrum as per IS 1893-2002 Part-1 for zone III and medium soil is used In this study the base isolated buildings are compared with that of a fixed base building based on natural period, base shear, story acceleration, roof displacement and story drift. The analysis result indicates that natural period and roof displacements have increased for the base isolated building. And base shear, story acceleration and story drift have significantly reduced in buildings with base isolation. Keywords: Base isolation, Pushover analysis, Response spectrum analysis, Time history analysis References:
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36. |
Authors: |
Sameeha Latheef, Katta Venkataramana | |
Paper Title: |
Investigation on Reduction of Seismic Response of a Chimney Due to Tuned Mass Damper | ||
Abstract: Reinforced concrete chimneys are tall and flexible structures which are widely used in industries. The critical loads for which these are designed are wind and earthquake loads. Single tuned mass damper (STMD) installed on the chimney reduces the structural response under dynamic loads. The reduction in base shear, base moment and acceleration responses are investigated. A comparison is drawn out between the responses of a chimney with STMD and a chimney with no damper (uncontrolled chimney). Keywords: Chimney, STMD, Seismic Response. References:
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37. |
Authors: |
Ramaswamy K. P, Alexandra Bertron, Manu Santhanam, Raisa Shabeer | |
Paper Title: |
Acid-Related Factors Affecting the Degradation Kinetics of Cement-Based Materials | ||
Abstract: Industrial and agricultural effluents contain lot of acids (organic and inorganic) and hence are aggressive to cement-based materials which are inherently alkaline. The concrete structures coming into contact with these effluents are susceptible to the degradation by acids. The attack by acids results in the decalcification of hydration products deteriorating the microstructure, thus affecting its durability. The integrity of the matrix is affected causing the corrosion of reinforcement when the entire cover concrete is attacked. The kinetics and mechanism of degradation is influenced by various factors related to acid, binding materials and the test method. The underlying factor affecting the degradation kinetics is acid related factor and hence, an in-depth analysis of acid related factors are necessary to understand the phenomenon in a better way. This paper outlines the basic mechanism of acid attack and gives an overview of acid related factors affecting the kinetics of degradation. The primary factor influencing the degradation kinetics is the ability of salt to precipitate or not, which is governed by the solubility of calcium and aluminium salts. The solubility in turn depends on the anion of the acid (i.e. the acid type). The other factors such as pKa value of the acid (when the salts are soluble), concentration of acid also govern the degradation kinetics. The kinetics also depends on the characteristics of the salts such as affinity of the salts with the matrix, mesoscopic shape of the salt and molar volume of the salts (if salts are less soluble). The chemical properties of the acids such as the pH rise of the acid solution, buffer action, polyacidity and complexation property exhibited by few organic acids also contribute to increased aggressiveness. As in most of the cases such as sewer pipes and waste water treatment plants, the acid is produced by the microbial organisms; the paper also highlights the action of biogenic acid when compared to the action of mineral acid. A clear understanding of the above acid factors could help in arriving at suitable concrete mixture formulations to combat with these aggressive acidic environments. Keywords: Acid Attack, Aggressiveness, Degradation Kinetics, Durability, Inorganic acid, Organic acid. References:
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38. |
Authors: |
Pradeep Kumar Pandre, Katta Venkataramana | |
Paper Title: |
Optimum Location of Shear Walls in Multi-Storey Building | ||
Abstract: Shear walls are recommended for high rise buildings since they impart stiffness and strength to the structure. They resist gravity as well as horizontal loads. These horizontal loads may include wind and earthquake forces. Hence damage to the structure is reduced by reducing the lateral sway of the building. Therefore it is essential to find out the ideal location of shear wall in a building. The present work deals with the study on the optimum location of shear wall in a multi-storey building. Shear walls are symmetrically placed in the building. Seismic behavior is investigated. Important parameters like story displacement, stoery drift and stiffness are considered and analyzed using non-linear finite element analysis software ETABS 2015. By carrying out dynamic Response Spectrum Analysis, the building models are examined. The results of the analysis for storey drift and displacement are compared. Keywords: ETABS 2015, Response Spectrum Analysis, Shear walls location and Storey Displacement. References:
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39. |
Authors: |
Neeraja Mercy Joseph, Hazeena R. | |
Paper Title: |
A Review on Progressive Collapse of Structure | ||
Abstract: Progressive collapse is one of the most under-researched areas in structural engineering due to the limited number of the circumstances leading to progressive collapse. The current design standards and building codes provide a little prescriptive or performance-based guidance on analysis or design to guard against progressive collapse. The collapse of the World Trade Center on September 11, 2001, led to the amendment of current building codes and provides protection against collapse caused by extreme events. This paper aimed to discuss the phenomenon of progressive collapse; causes, vulnerability of structures and analysis methods. This also explores aspects of the current state of knowledge on progressive collapse. Keywords: Progressive Collapse, Vulnerability. References:
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40. |
Authors: |
Rohith Kumar A S, Premanand Shenoy | |
Paper Title: |
Finite Element Analysis of Gusset Plates | ||
Abstract: Structural optimization is a process of making high performance structures by identification and removal of un-necessary material without affecting safety, serviceability and durability requirements. This paper consists of description of a methodology adopted and results obtained for the shape optimization of gusset plates used to connect steel members in a structure. The step by step procedure for the development of Finite Element Analysis of 2D plates subjected to in-plane bending, conceptualization, mathematical formulation adopted for structural optimization specific to gusset plates transferring loads in-plane, based on utility ratio are presented. Typical cases are presented as examples, results are discussed and conclusions are derived. Keywords: Gusset Plate, Finite Element Analysis (FEA), Structural Optimization, Utility Ratio. References:
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41. |
Authors: |
Vindhuja V S, Amrutha M A, Archana V P, Amina Sherrif, Reshma Dustan | |
Paper Title: |
Derivation of an Empirical Relation between Volume and Peak of Direct Runoff for Karamana River basin | ||
Abstract: The need for efficient water supply system is inevitable. River basins can be classified as linear basins and nonlinear basins. In basins where the hydrologic data is scarce, several empirical relations are adopted to carry out the design process. One of the most important is the relation between volume and peak of direct runoff. It has immediate application in design of hydraulic structures and water resources planning. The log volume and log peak relation can be used to explain linearity or nonlinearity of drainage basins, identify hydrologically similar or dissimilar basins. The prediction of runoff including its time distribution generated by individual storm bursts is essential for efficient flood forecasting and the operation of hydraulic projects. In hydrological analysis and design, it is often necessary to develop relations between precipitation and runoff. Through these relations the estimates of the runoff of ungauged catchments can be obtained Keywords: Linearity, Nonlinearity, Flood forecasting, Hydrological analysis References:
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42. |
Authors: |
Sumaiyah Tazyeen, B L Shivakumar, Shivakumar J Nyamathi | |
Paper Title: |
An Integrated Approach to Urban and Peri-Urban Storm Water Management | ||
Abstract: Storm water has been touted as an indisputable major concern in the urban and peri-urban areas of India ascribed to the impact of highly impervious areas, decreased potential for infiltration, and loss of natural depression storage. However, the fluctuations in precipitation and melt down of snow and ice have reported to cause variations in the hydrological systems in several regions. The high latitudes are the only region on Earth that are contemplated to intensify rainfall in coming years. This might lead to various risks owing to numerous factors such as rising temperatures, increased levels of sediments, nutrients, and pollutants triggered by heavy rainfall, and disruption of treatment facilities during floods. Simultaneously, climatic change causes frequent and extreme weather events that alter the quality, quantity and seasonality of water available to urban centers and their surroundings. Existing approaches have been deemed to be inefficient and channeled by well-established fallacies having prime emphasis on inept flood control strategies. Subsequently, water authorities must revisit the conventional practices to implement effective ways that ensure human wellbeing while safeguarding the integrity of the resource base. Practices such as urban water management administer rainwater, wastewater, storm water drainage, runoff pollution and floods. Besides, urban water management is of the notion that water storage, distribution, treatment, recycling, and disposal are a part of the same resource management cycle by categorizing the relationships among water resources, land use, and energy. Thereby, this study comprehensively reviews various approaches that have widely researched urban and peri-urban water management to surpass the traditional measures and have acknowledged the significant role that urban planning may perhaps take part in conserving urban water environments. The full-length paper discusses the storm water problem in urban and peri-urban areas and an attempt is made to understand the storm water management. Keywords: Climate Change, Land-use and Land cover, Storm water, Urban and Peri-urban areas. References:
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43. |
Authors: |
Challa Divya Sri, Brema | |
Paper Title: |
Assessment of Water Quality Index of Panipat District, Haryana | ||
Abstract: The study has been carried out in the Panipat district of Haryana using GIS modelling. This study gives us a valuable information on the general properties of water quality parameters like pH, electrical conductivity, TDS, Bicarbonate, Sulphate, Nitrate, chloride etc. of the study area. Water samples were analyzed in the water quality lab of NIH, Roorkee. In the study area, the pH of water varied from 7.18 to 7.4, Electrical conductivity of the river sample falls from 130.8µmho/cm to 341µmho/cm. Electrical Conductivity of pond’s sample varied between 139.3µmho/cm and 888µmho/cm and in case of ground water it varied from 307µmho/cm to 1042µmho/cm. The overall total dissolved solids in the study area varied from 71mg/l to 1369mg/l. The overall range of Chloride in the study area tends to fall between 4.02mg/l to 265.94mg/l. The value of sulphate for the water samples, collected from the study area ranged from 3.16mg/l to 106.07mg/l .The value of the Bicarbonate varied from 42mg/l to 610mg/l. The water quality parameters in the study were estimated using two methods : 1) titration method 2) instrumental method. The study was carried out in the three blocks of Panipat district, Haryana namely Israna, Matlouda, Samalkha spreading over nine villages. Keywords: Water quality; Index; rating scale; variations; References:
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44. |
Authors: |
Janet Joseph, J. Brema | |
Paper Title: |
Morphometric Analysis of Mandakini Basin using Geospatial Techniques | ||
Abstract: Geospatial Technique i.e., remote sensing and geographic information system has been proved to be one of the most efficient tool for the delineation of the desired watershed. Geographic information system and various image processing techniques are used for the identification of morphometric features and basin characteristics. The morphometric parameters are linear, areal, relief and slope aspects. The Mandakini basin study is carried out for all the mentioned aspects. The study revealed that the basin has six order streams, first order having 333 no. of streams, second order with 136, third order with 18, fourth order with 7, fifth order with 2 and sixth order 1 no of streams. The length of the stream segment is maximum for the 1st order stream and decreases with the increase in stream order. Geometric aspects reveal that the basin elongation is less in shape with moderate to very high relief and longer duration of flow in the basin. The minimum relief is 625m and maximum rises upto 6741m. The study helps in management of water resources for the local and nearby places. Keywords: Morphometry, Basin, Aspects References:
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