Residual Shear Capacity of Post-Fire RC Beams under Indirect Loading

Building fire is one of the most frequent disasters. The mechanical properties concrete and steel will deteriorate to different degrees under exposure, thus weakening bearing capacity reinforced (RC) members. Therefore, it great theoretical practical significance carry out research on RC members subjected fire. To study residual shear post-fire beams indirect loading, static load tests were carried six full-scale investigate development diagonal cracks failure modes an load. Numerical models established with ABAQUS effect span-to-depth ratio stirrup tested after calculation method indirectly loaded high temperature proposed. results indicate that although had no obvious affect mode beam aggravated degree without additional transverse reinforcement. Moreover, ultimate bending reinforcement decreased obviously indirectly-loaded compared directly-loaded due variation in ratio. good agreement results, average absolute error was 3.88%. this for a less than 3.0 as proposed paper effective. findings are expected provide reference improved fire-resistant design structures loading.