矩形钢管混凝土柱与钢梁半刚性节点的抗震性能试验研究

Experimental study on seismic performance of rectangular concrete-filled steel tube column-to-steel beam semi-rigid connections

本文进行了两种矩形钢管混凝土柱与钢梁半刚性连接节点———加劲端板(SEP)连接节点与双T板(DST)连接节点在柱端低周反复荷载作用下的拟静力试验,目的在于了解这两类节点在不同轴压比下的滞回性能、强度与刚度退化、延性与破坏机制。并与常规焊接翼缘板(WFP)连接节点作了比较。结果表明:不同轴压比对节点转动有一定的影响,加劲端板(SEP)连接节点与双T板(DST)连接节点具有良好的转动延性与耗能能力。

The qusai static experimental investigation into seismic behavior of rectangular concrete filled steel tube column to steel beam semi rigid connections was conducted. Two kinds of composite connections, namely stiffened end plate (SEP) connection and double split tee plate (DST) connection, were tested under low cycle reversed loading at the ends of columns. The aim of the study is to know the relationship between force and displacement at the end of column, the relationship between the moment and rotation of the joint, degradation of strength and stiffness, ductility, failure mechanism of these two kinds of semi rigid joints, and compare with those of the normal welded flange plate (WFP) connections under different axial compression ratios. It can be concluded that the different axial compression ratios affect the rotational capacity of the connections,while SEP connection and DST connection have good rotational ductility and energy dissipation capacity.