Determination of Fire Resistance of a Two-Way Slab: An Introduction to Finite Element Method
NBirla Institute of Technology and Science
A Report on
Determination of Fire Resistance of a Two-way Slab
As a part of Introduction to Finite Element Method (CE C471)
By:
Nitin Hiran 2008A2PS522P Department of Civil Engineering
Under the guidance of:
Mr. G. Muthukumar Lecturer Department of Civil Engineering
Acknowledgement
I extend my sincere gratitude towards Mr. G. Muthukumar for providing me with the opportunity to take a project under his guidance and benefit with his knowledge. I would thank him for teaching me the basic concepts and clearing my doubts regarding the subject. He also motivated and encouraged me throughout the project sparing his precious time.
I am also thankful to my family and my friends for supporting me throughout the project.
Abstract
This document deals with the study and computer modelling of a two way reinforced concrete slab under fire conditions. The fire loads are as specified by IS 3809-1979. Two methods – transient thermal analysis and transient thermo-structural analysis are used to estimate the time taken before the structure is considered to have failed. Finite Element Method (FEM) based software package - ANSYS was used to perform the analysis on the slab. The fire resistance is calculated in number of hours taken by the slab to fail.
Keywords
Transient Thermal Analysis, Two-way slab, Cover depth, Simply supported structure, Shell elements.
Contents
S. No.
Topic
Page No.
1. 2. 3. 4. 5. 6. 7.
Introduction Fire Loads Slab properties Modelling in ANSYS Transient Thermal Analysis Transient Thermo-Structural Analysis Conclusion References
1 1 2 3 4 7 9 10
1. Introduction
A two-way slab is a two dimensional structure which requires moment resisting reinforcements in both longitudinal and transverse directions. There are large moments developed in both directions and hence are supported along all four edges. Fire resistance of a structure is very significant in
A Report on
Determination of Fire Resistance of a Two-way Slab
As a part of Introduction to Finite Element Method (CE C471)
By:
Nitin Hiran 2008A2PS522P Department of Civil Engineering
Under the guidance of:
Mr. G. Muthukumar Lecturer Department of Civil Engineering
Acknowledgement
I extend my sincere gratitude towards Mr. G. Muthukumar for providing me with the opportunity to take a project under his guidance and benefit with his knowledge. I would thank him for teaching me the basic concepts and clearing my doubts regarding the subject. He also motivated and encouraged me throughout the project sparing his precious time.
I am also thankful to my family and my friends for supporting me throughout the project.
Abstract
This document deals with the study and computer modelling of a two way reinforced concrete slab under fire conditions. The fire loads are as specified by IS 3809-1979. Two methods – transient thermal analysis and transient thermo-structural analysis are used to estimate the time taken before the structure is considered to have failed. Finite Element Method (FEM) based software package - ANSYS was used to perform the analysis on the slab. The fire resistance is calculated in number of hours taken by the slab to fail.
Keywords
Transient Thermal Analysis, Two-way slab, Cover depth, Simply supported structure, Shell elements.
Contents
S. No.
Topic
Page No.
1. 2. 3. 4. 5. 6. 7.
Introduction Fire Loads Slab properties Modelling in ANSYS Transient Thermal Analysis Transient Thermo-Structural Analysis Conclusion References
1 1 2 3 4 7 9 10
1. Introduction
A two-way slab is a two dimensional structure which requires moment resisting reinforcements in both longitudinal and transverse directions. There are large moments developed in both directions and hence are supported along all four edges. Fire resistance of a structure is very significant in
References: [1] Indian standard code of practice for Fire Resistance Test of Structures, IS: 38091979, Bureau of Indian Standards, New Delhi. [2] Indian Standard Code of Practice for Plain and Reinforced Concrete, IS 456:2000, Bureau of Indian Standards, New Delhi [3] C S Krishnamoorthy, Finite Element Analysis, Theory and Programming, Tata McGraw Hill. 10