新型异形钢管混凝土结构可更换剪切板式节点抗震性能研究

Research on seismic performance of a new type of replaceable shear-plate joint of special-shaped concretefilled steel tube structures

提出了一种新型异形钢管混凝土结构剪切板式节点,制作了2个可更换剪切板式梁柱节点进行拟静力试验与有限元分析,获得了2个节点的滞回曲线、延性性能和耗能能力等力学性能指标。研究表明:不同开孔形式的剪切耗能板会造成不同的破坏模式;采用腰孔型剪切耗能板的新型异形钢管混凝土结构剪切板式节点的延性性能和耗能能力较好。在试验和数值模拟的基础上,研究了板件间摩擦系数对节点抗震性能的影响,当摩擦系数增加至0.30时,节点抗震性能更好。

A new type of shear-plate joint of special-shaped concrete-filled steel tube(CFST)structures was proposed.Two sets of replaceable shear-plate beam-column joints were fabricated for pseudo-static tests and finite element analysis.The mechanical properties of the two joints,such as hysteretic curves,ductility properties and energy dissipation capacity,were obtained.The results show that the failure modes of the different special-shaped CFST shear-plate joints with different openings are different.Shear-plate joints with waist holes has better ductility and energy dissipation capacity.Base on the test and numerical simulation,the influence of friction coefficient between plates on the seismic performance of joints was studied.When the friction coefficient is raised to 0.30,the seismic performance of joints is better.