In view of the problem that the retaining block is easy to be damaged in earthquake,the integral cast-in-place retaining block specimen A1 and the post-pouring retaining block specimen A2 are designed and fabricated.The low-cycle quasi-static test is carried out by the 6-channel MTS instrument to explore the influence of the interface connection block on the lateral seismic performance of the bridge.The failure characteristics,hysteresis curve,skeleton curve and energy dissipation capacity of the two types of interface connection blocks are analyzed.The test results show that the block A1 is a typical shear failure,and the block A2 is an interfacial debonding failure.The skeleton curve of block A1 has typical three-stage characteristics and has good ductility under load.Low cyclic loading leads to the slip of the connecting steel bar at the A2 interface of the retaining block,and the seismic capacity of the retaining block continues to decrease.Increasing the number of planting bars and anchoring depth can effectively improve the lateral seismic performance of the post-pouring retaining block.
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