【摘要】 为研究采用穿芯高强螺栓-端板节点的方钢管混凝土柱-钢梁平面框架的抗震性能,制作了3榀方钢管混凝土框架试件,通过低周反复荷载试验,研究了框架的抗震性能,分析了轴压比、梁柱线刚度比对框架抗震性能的影响。在考虑几何、材料及接触非线性的基础上,采用有限元软件ABAQUS 6.10对试验框架进行了低周反复荷载作用下的精细化数值模拟。与试验结果的比较表明,数值分析结果与试验结果吻合较好,具有较好的精度,可用于方钢管混凝土框架的分析。基于数值分析结果,剖析了框架梁柱连接节点、柱脚等关键受力部位的应力发展过程,明确了框架的受力机理和破坏机制。更多还原

【Abstract】 To research the seismic behavior of concrete filled square steel tube(CFT) columns and steel beam planar frame with through bolt-endplate beam-column connection,a total of 3 pseudo-static experiments have been conducted for three planar experimental specimens.The influence of axial load ratio and linear stiffness ratio of steel beam’s to column’s on the frame seismic behavior are investigated.The nonlinear finite element analysis involving geometric,material and contact nonlinearities is made using the ABAQUS finite element package.The results of the nonlinear analysis for the frame agree well with the experimental ones.Based on the results of the nonlinear analysis,the stress developing progress of beam-column joints and column bases is investigated.The load-transferring mechanism and failure mechanism are determined.更多还原