Nolinear Finite Element Analyses On The Shear Performance Of Reinforced Concrete Frame Beams Under Fire And After Fire Conditions With Stirrup Reinforcement Ratio

As to the increasingly widespread application of reinforced concrete structure, the study of this material in a variety of working conditions and the working environment becomes more and more important.The shear strength behavior of reinforced concrete beams under elevated temperature attracts more attention by scholars. The application of ABAQUS simulation analysis software will import the temperature field, comparing the methods of six kinds of reinforcement ratio fire of reinforced concrete frame beam.Elevated temperature conditions affect the mechanical and thermal properties of steel and concrete. Summarizing the thermal conductivity, elastic modulus, density,stress-strain relationship, the tensile compressive strength and the yield strength of the concrete and the reinforcement bars, due to the deterioration by high temperature, the selection of the parameters is very important for the shear performance studies.By the temperature field analysis, the author can get the temperature changes of beam section by different fire duration and further analyze the deformation of the beam on this basis.After a review of extensive literatures on shear strength under fire, the author understand Shear strength mechanism, and find that a number of factors which affect the behavior of Shear.