WorldCat Identities

Chandrasekaran, V. (Vute)

Overview
Works: 21 works in 22 publications in 1 language and 0 library holdings
Roles: Author
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Most widely held works by V Chandrasekaran
Numerical studies on bond strength of reinforced concrete specimens exposed to fire by Suresh Ramabhai( Book )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

In this paper, a non-linear finite element approach is used to study the bond-mechanism of steel and concrete at elevated temperatures. The paper describes the various factors governing the bond strength of steel and concrete at ambient and elevated temperatures. The model is capable to account for the reduction in the strength of concrete and steel at high temperatures. The results foam the model show good agreement with published numerical work at ambient temperature. The behaviour of the bond between concrete and steel at elevated temperatures reveal significant reduction of its bond resistance. Predicted results show that the reinforced concrete will attain a total collapse at lower stress levels at higher temperatures in comparison to condition at ambient temperature
Zone models in fire safety engineering by V Chandrasekaran( Book )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

Design solutions for steel beams exposed to fire by V Chandrasekaran( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

Steel beam and concrete floor assembly systems have been used in many high rise as well as industrial constructions. These systems support the entire structural loading. Normally in the event of fire occurrence the steel beam concrete floor assembly is exposed to fire from the underside of the floor slab. The analysis of the steel beam and the concrete floor system exposed to fire has not been dealt with adequately in the literature. Herein, nonlinear finite element analysis has been adopted to study the performance of the steel beam concrete slab system exposed to fire. The study is done in two parts. The first part deals with the heat transfer mechanisms of the structural assembly. The variations of properties such as thermal conductivity in the heat transfer mechanism have been taken into account along with radiation and convection. Also, stress-deformation analysis of the structural component has been performed using non linear finite element analysis techniques. Both material and geometric nonlinearities have been incorporated in the studies. The analyses were performed for the standard time temperature curves described by ISO 834. The paper describes the various aspects of the heat transfer mechanisms of the structural assembly. The variations of the temperature at different locations have been provided. The paper discusses in detail the stress deformation behaviour of the steel beam and concrete slab system exposed to fire from the underside of the slab. Information beneficial to the designer in evaluating the performance of steel beams supporting the concrete slab exposed to fire has been provided in the paper
Performance mechanisms of fire walls at high temperatures by V Chandrasekaran( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

The performance of concrete masonry walls exposed to fire and pressure loading have been analysed. The analysis is based on a two-step non-linear finite element analysis technique. In the first step, the performance of the wall as a thermal barrier is investigated using transient thermal analysis procedures. In the second step, the stress-displacement characteristics of the wall is determined using nonlinear finite element analysis. The variations of different properties with temperatures and loading levels have been considered in the analyses. The theoretical investigations have been carried out for different wall heights and thicknesses. The computed results have been compared with the experimentally observed temperature profiles and displacements obtained when a series of concrete masonry walls were subjected to the fire resistance test of ISO 834. The computed and experimental data show close agreement. The thermal barrier efficiencies of the concrete masonry block have been discussed. The various factors which control the structural performance of walls exposed to fire are discussed. The information provided on the performance of walls under fire conditions is appropriate for practising fire safety engineers
Comparison of effects of central and corner fires using computational fluid dynamics (CFD) techniques by Guan Heng Yeoh( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

An efficient field model based on CFD techniques is being developed to predict the smoke spread and fire growth. In this paper, as a test case, the field model has been used to investigate the effects of a f re located at the centre and corner of the standard ISO 9705 room size. The computational fluid dynamics techniques adopted as the methodology incorporated various models to consider the effects of the turbulent flow, radiation and combustion in the enclosure to predict various output quantities From the investigations, different flow and temperature structures were obtained for the two cases which were affected by the location of the f re and the entrainment of the air to the f re. It was found that the corner room fire displayed a more stable phenomenon in comparison to the centre room fire. The computed results suggested that the field model approach can reliably predict the complexities associated with fire and smoke spread of which zone models may not due to their simplicity and restrictive assumptions
Mathematical modelling for the analysis of fire and structures by V Chandrasekaran( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

The various aspects of the physical problem - the fire, smoke spread and the effects of fire have been explained. Due to the developments in computer technology, the past decade has seen a steady increase in the engineering research efforts in the development and application of fire models to provide solutions to the analysis of fire and its effects. The various research aspects and the engineering response to fire protection has been analysed by examining the research process associated with the development and application of mathematical modelling and analytical techniques dealing with fire safety engineering. The general research approach of fire models in dealing with ignition, fire and smoke spread have been analysed. The engineering research involved in the deterministic zone and field models have been examined for the various components of fire dynamics and smoke spread. The direction of engineering research in the use of powerful numerical techniques such as finite difference and finite element methods of analyses in fire safety engineering has been brought out. The engineering research involved in the analysis of temperature distribution and structural integrity using the above techniques have been examined
A numerical investigation of fire in a large arbitrary shape compartment( Book )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

This paper describes the developments of an effective fire model using the Body-Fitted Coordinate (BFC) system and the Computational Fluid Dynamics (CFD) techniques. The model was developed with the intention of engineering usage for handling complex arbitrary geometry while considering computer economy and adequate level of physical reality to predict the fire and smoke spread in buildings. The developed methodology incorporated solutions to the turbulent flow, combustion and radiation in the physical domain Validations of the model have been made by comparing the computed quantifies with the case of a carefully conducted fire tests in the recently completed Adelaide Basketball Sports Centre. Good agreement was obtained between the computed results and the experimental measurements The model was also capable of predicting the complex turbulent flow due to the induced entrainment of high order velocities through one of the western fire escape doors of the stadium
Cost-effective fire regulations for developing countries by S. J Grubits( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

Numerical prediction of fire and smoke spread by Guan Heng Yeoh( Book )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

The important requirements of engineering research in fire technology are to develop methods capable of providing reliable fire safety engineering systems by the accurate analysis of fire and its effects Recent advances in the research area of fire technology have been aimed at the development of analytical techniques and mathematical models dealing with various aspects of fire safety engineering Fu-e in itself is defined as the state of burning involving complex physical and chemical aspects of the material, or the engineering structure, which is subjected to this condition In order to properly analyse a fire, a suitable methodology covering the various aspects of the interaction between the physical and chemical properties of the system under the state of fire is required Environmental aspects as well as the characteristics of the surroundings are also important aspects in evaluating the severity of the fire. The physical aspects of the behaviour of a fire in an enclosure are briefly discussed
Three-dimensional numerical study of fire in a large compartment incorporating soot and radiation by V Chandrasekaran( Book )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

This paper describes the developments of an effective fire model using the Computational Fluid Dynamics (CFD) techniques. The model was developed with the intention of engineering usage considering computer economy and adequate level of physical reality to predict the fire and smoke spread in buildings. The developed methodology incorporated solutions to the turbulent flow combustion and radiation in the physical domain. Validations of the model have been made by comparing the computed quantities with the case of a carefully conducted fire tests in a large size compartment. Good agreement was obtained between the computed results and the experimental measurements. The model was also capable of predicting the complex turbulent flow due to the induced entrainment of high order velocities through the doorway. Extension of the model to include the soot formation and oxidation has found to give satisfactory predictions of the soot distribution in the compartment space
Application of computer zone fire models for the prediction of structural failure due to thermal effects by Duy Q Duong( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

Mathematical modelling and neural network simulation in fire safety engineering research by V Chandrasekaran( Book )

1 edition published in 1993 in English and held by 0 WorldCat member libraries worldwide

Analysis of steel columns exposed to fire by V Chandrasekaran( Book )

2 editions published in 1994 in English and held by 0 WorldCat member libraries worldwide

Steel columns are used in many high rise as well as industrial constructions. These columns act as the main load carrying member. In this paper results of analytical studies carried out to evaluate the performance mechanisms of steel columns exposed to fire have been presented. The finite element method is used to analyse the buckling behaviour of geometrically perfect steel columns at elevated temperatures. The column behaviour up to collapse was investigated considering geometric as well as material non-linearities. The analysis includes non-linear material characteristics as a function of temperature. The importance of proper idealisation of stress strain temperature behaviour has been brought out. The buckling characteristics of columns have been analysed for continuous stress-strain-temperature material behaviour as well as elasto-plastic bilinear idealisations. The influence of slenderness ratios was found to control the buckling behaviour of columns at elevated temperatures. Solutions have been provided to evaluate critical stresses of columns with different end fixity conditions. The factors which control the performance of columns exposed to fire have been discussed Comparisons have been made with other analytical approaches and available experimental data. It is believed that the fire safety engineer will be benefited from these studies
Fire testing and smoke control for lift doors, present and future trends by S. J Grubits( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

The building regulations in Australia are in a state of transition. The traditional prescriptive requirements are progressively being replaced by performance requirements. A major Fire Code Reform Program has commenced with the objective to facilitate this transition and to introduce new engineering codes, standards and regulations. The implications of this transition is examined for the lift and elevator industries. The paper examines the role of lift and elevator systems in the provision of life safety in buildings from a fundamental fire safety engineering perspective. Topics examined include smoke management, control of fire spread and future requirements for fire-rated doors
Computational techniques by V Chandrasekaran( Book )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

A numerical model for thermal bowing of masonry walls by M Dhanasekaran( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

Understanding of bowing characteristics of masonry walls subjected to fire will enhance the analysis of insulation, integrity and structural adequacy failure modes of the wall. This paper describes a thermo-structural coupled finite element model based on layered thin shell element which is currently under development The results of the initial simplified structural analysis model in predicting the thermal bowing of masonry walls are included in the paper. The model is verified using the experimental results reported by Shields et al
Analysis of pile foundations subjected to dynamic loads in soils with linearly varying modulus by V Chandrasekaran( Book )

1 edition published in 1989 in English and held by 0 WorldCat member libraries worldwide

The analysis of smoke and fire spread using special purpose computational fluid dynamics code( Book )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

This paper describes the developments of an effective field model based on Computational Fluid Dynamics (CFD) techniques. The model was developed with the intention of engineering usage considering computer economy and adequate level of physical reality to predict the fire and smoke spread in buildings The developed methodology incorporated solutions to the turbulent flow, combustion and radiation in the physical domain. The importance of combustion models in various aspects r elating to reaction to fire and treatment of burning and flame spread have been brought about by considering various combustion and pyrolysis models. Validations of the code have been made by comparing the computed quantities with carefully conducted fire tests carried out in various compartments
Investigation of smoke and temperature distribution in multi compartments( Book )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

A series of full scale room burn experimental investigations were carried out in a typical single-storey Australian house. All six experiments were conducted with various well defined design fire sizes and types. The research dealt with the observations of the effect of each of these fires located in a strategic design location, in the back corner of one of the rooms. The house was instrumented carefully with various instruments. Temperatures at various heights were measured at twenty locations throughout the house and smoke meters were placed at two heights in several rooms to monitor the progress of the fire and hot smoke through the house and to monitor conditions in each room. Sampling tubes for measuring CO, CO2 and O2 concentrations were placed at the same locations as the smoke meters. A VESDA (Very Early Smoke Detection Apparatus) unit was installed on the ceiling in two of the rooms at the same location as smoke meters in each of these rooms and the times to activation monitored. This paper describes the details of the experiments and summarises the data describing the effect of the fires at various parts of the house at different time intervals. A series of such experimental investigations are currently being utilised to validate various mathematical models and numerical techniques currently under development at DBCE, CSIRO for evaluating the fire and smoke spread in single and multi compartments
Dynamic response of fixed head piles using nondimensional analysis by V Chandrasekaran( Book )

1 edition published in 1990 in English and held by 0 WorldCat member libraries worldwide

 
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English (21)