新型方钢管混凝土柱-钢梁节点抗震性能试验研究

Experimental study on seismic behavior of new type connection for concrete-filled square steel tube

通过柱端加载的低周反复荷载试验对8个内隔板三边焊接,而在未焊一边柱壁板上布置圆柱头栓钉的方钢管混凝土柱-H形钢梁节点进行了试验研究,研究了不同轴压比情况下节点的破坏模式、延性、耗能性能等。试验结果表明,破坏之前节点具有良好的滞回性能、延性及耗能能力,满足现行抗震规范的要求。该节点可以用于方钢管混凝土柱两侧弯矩相差较大时,弯矩较小一侧节点。提出了相关的设计建议。

A total of eight interior diaphragm connections were tested under low-cyclic reversed loading at the end of column for concrete filled square steel tubular column and steel beam. The interior diaphragms had only three edges welded to the tubes, and the headed studs were welded to the face of the column, which was not welded to the interior diaphragm The failure modes, ductility and energy dissipation capacity of the connection with different axial compressive force ratios and length of headed stud were studied. The experimental results show that all the specimens have well hysteretic behavior, ductility and energy dissipation capacity before failure. This kind of joint meets the requirements of the current code for seismic design of buildings. And it can be used for the beam-to-column connection with minor moment. Additional seismic design recommendations are presented.