【摘要】 以天津泰达广场CBD工程A、B区超高层项目为背景,进行了不同连接方法的6个足尺矩形钢管混凝土柱-H型钢梁节点试件拟静力试验,分析了试件的破坏特征、承载力、延性、耗能能力、刚度退化、强度退化等性能。结果表明:在保证焊接及安装质量的前提下不同连接方法节点均具有较高的承载力及良好的抗震性能;在梁翼缘两侧焊接加强板有利于节点承载力的提高,矩形钢管中填充混凝土有利于减小节点核心区的剪切变形,提高节点的强度及刚度。利用ANSYS 10.0软件对试件在循环荷载作用下的滞回性能进行非线性模拟计算,并将理论分析结果与试验结果进行对比。对比结果表明,非线性有限元分析得出荷载-位移曲线与试验结果吻合较好,矩形钢管混凝土柱-H型钢梁节点均具有良好的耗能能力。更多还原

【Abstract】 Taking the project of the A and B area ultra-high-level building of TeDa square in Tianjin as background,cyclic loading tests on six full scale square CFT column to H-shape steel beam joint specimens containing four different kinds of joint of details were carried out.The basic situation and failure characteristics of all specimens were introduced.The bearing capacity,ductility and energy dissipation capacity,stiffness degradation and strength degradation of four kinds of joints were compared.Test results show that,if the quality of welding and installation can be ensured,all four kinds of joints have high bearing capacity and good seismic behavior.Welding reinforcing plates on both sides of the beam flange contributes to the joint bearing capacity.Filling concrete in the rectangular pipe is useful for reducing shear deformation and improving strength and rigidity of cores of beam-column joints.In addition,ANSYS 10.0 was used to simulate the hysteretic behavior of the specimens and the nonlinear analysis was carried out.The results of theoretical analysis were compared with the test results.It indicates that the force-displacement curve obtained from nonlinear finite element analysis agrees well with the test result.The connection between concrete-filled rectangular steel tube column and steel beam discussed in the paper has good capability of energy consumption.更多还原