Seismic performance analysis of new prefabricated reinforced concrete columns connected with steel joints
Joint connection is the key factor that affects the seismic performance of prefabricated concrete structures,and is the core issue of seismic design.This paper evaluates the seismic performance of a proposed steel joint connection designed for reinforced concrete(RC)columns with variable cross-sections.Through finite element simulations and comparative analysis with cast-in-place columns,the failure mode,deformation performance,and energy dissipation capacity of the new prefabricated variable cross-section RC column under different axial compression ratios were studied.The results show that the failure mode of the new prefabricated RC column is similar to that of the cast-in-place column under different axial compression ratios;When the concrete at the bottom of the prefabricated RC column is crushed,there is no obvious plastic deformation in the steel joint area,so it meets the design requirements of strong joints;The displacement ductility coefficients of prefabricated RC columns exceed 3,which meets the requirements of the seismic code;Although the bearing and energy dissipation capacities of the prefabricated RC columns are slightly lower than those of cast-in-place columns under the same axial compression ratio,their deformation capacity is superior.
万方数据
维普
