الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Behavior of Reinforced Concrete (RC) structures at elevated temperature is one of the currently active research topics. Many researchers have performed tests under elevated temperatures to investigate its effect on mechanical properties and structural integrity. Most of the previous research studies focused on the flexural performance of structural elements exposed to elevated temperatures. Although, there was an increasing awareness that shear failure could be critical and may be the governing failure mode of reinforced concrete elements during fire, little research work has been done on fire resistance of RC beams subjected to shearing force. An efficient nonlinear 3D finite element models have been developed using ABAQUS software and used for heat transfer analysis and stress analysis for beams subjected to shearing force. The material nonlinearities were carefully considered in the analysis. The reliability of the models was demonstrated by comparisons with experiments and with alternative numerical analyses.An extensive parametric study was carried out using the finite element models to study the effects of the change in cross-section geometries, stirrups ratio, percentage of bent up bars and stirrups, bent up bars configuration, and the concrete beam cover on the shear capacity and on the fire resistance of simply supported beam subjected to shear force. A total number of 25 beams were studied to investigate the effect of shear reinforcement on the fire resistance. The beam cover and using bent up bars as web reinforcement are significant parameters which improve the fire resistance.