EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF MIXED FRAME WITH SRC COLUMNS AND STEEL BEAM

摘要

To ensure the RC frame structure has better seismic performance,in the seismic design,the design bending moments of column is enlarged by the strong-column and weak-beam measures. But SRC structure has advantage than RC structure in strength and ultimate deflection capacity. For take advantage of SRC structure material property,two mixed frame with weak SRC columns and strong steel beam were designed. Based on experiment of two mixed frame with SRC columns and steel beam under low-reversed cyclic loading,hysteresis behaviour,ductility,energy dissipation and rigidity degeneration are studied. The test results show that the lateral loads versus lateral displacement hysteretic curves of the mixed frames are plump shuttle shape. The curves have no obvious strength and stiffness degradation. The mixed frame with weak SRC columns and strong steel beam has better seismic performance.