An Engineering Approach for Predicting Fire Response of Restrained Steel Beams

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Journal Title, Volume, Page: 
Journal of Engineering Mechanics, ASCE
Year of Publication: 
2011
Authors: 
M.M.S. Dwaikat
Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, Michigan State Univ
Current Affiliation: 
Department of Civil Engineering, An-Najah National University, Palestine
VKR Kodur
Dept. of Civil and Environmental Engineering, Michigan State Univ
Preferred Abstract (Original): 
Predicting the response of restrained beams under fire conditions is complex owing to the development of fire-induced forces and requires finite-element or finite-differences analysis. In this paper, a simplified approach is proposed for predicting the fire-induced forces and deflections of restrained steel beams. The method applies equilibrium equations for obtaining critical fire-induced forces and then utilizes compatibility principles for obtaining temperature-deflection history of the beam. Effect of end restraints, thermal gradient, location of axial restraint force, span length, and load intensity are accounted for in the proposed approach. The validation of the approach is established by comparing the predictions from the proposed approach with results obtained from rigorous finite-element analysis. The applicability of the proposed approach to practical design situations is illustrated through a numerical example.