矩形钢管柱-H形梁外加劲铸钢模块节点抗震性能试验研究

对矩形钢管柱-H形梁连接外加劲铸钢模块节点进行概念设计,并对该新型节点实施了循环往复加载的足尺试验,考虑了不同柱轴压比对节点抗震性能的影响。研究表明,提出的外加劲铸钢模块节点具有优良的延性、稳定高效的耗能能力、较大的承载力、合适的刚度,能充分利用节点域稳定剪切塑性耗能。经分析验证,现行节点域极限承载力公式经修正后可适用于外加劲铸钢模块节点;通过控制梁与节点域的相对强弱,可实现对节点屈服时序的控制。

Experimental investigation on seismic performance of cast modular joints with outer stiffener for steel RHS column to H-shaped beam frames

The cast modular joint with outer stiffener of steel rectangular hollow section (RHS) column to H-shaped beam frame was conceptually designed. The full-scale cyclic test was carried out on the innovative joint, considering the effect of different axial load ratios of column on the seismic performance of joints. Research results show that the proposed cast modular joints with outer stiffener exhibit remarkable ductility, stable and efficient energy dissipation capacity, high bearing capacity and appropriate stiffener, so that the cast modular joint can stabilize the shear plastic energy dissipation in panel zone. Based on the analysis results, it is found that after adequate revision, the current formula for ultimate bearing capacity of panel zone can be applied to the cast modular joint with outer stiffener. By controlling the relative strength between beam and panel zone, the control of yielding sequence of the joint can be realized.