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A Numerical Approach for Modeling the Fire Induced Restraint Effects in Reinforced Concrete Beams

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Sun, 2014-06-01 10:46 — Monther Dwaikat
Journal Title, Volume, Page: 
Fire Safety Journal Volume 43, Issue 4, Pages 291–307
Year of Publication: 
2008
Link: 
http://www.sciencedirect.com/science/article/pii/S0379711207000938
Authors: 
M.B. Dwaikat
Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824-1126, USA
Current Affiliation: 
Building Engineering Department, Faculty of Engineering and Information Technology, An-Najah National University, Nablus, Palestine
[email protected]
V.K.R. Kodur
Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824-1126, USA
Preferred Abstract (Original): 

In this paper, a model to predict the influence of fire induced restraints on the fire resistance of reinforced concrete (RC) beams is presented. The three stages, associated with the fire growth, thermal and structural analysis, for the calculation of fire resistance of the RC beams are explained. A simplified approach to account for spalling under fire conditions is incorporated into the model. The validity of the numerical model is established by comparing the predictions from the computer program with results from full-scale fire resistance tests. The program is used to conduct two case studies to investigate the influence of both the rotational and the axial restraint on the fire response of the RC beams. Through these case studies, it is shown that the restraint, both rotational and axial, has significant influence on the fire resistance of the RC beams.