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为研究半刚性钢管混凝土框架结构的抗震性能和破坏形式,进行了2榀2层单跨半刚性钢管混凝土框架的水平低周往复加载试验,分析了结构滞回性能、延性和耗能能力等,采用ABAQUS软件建立了半刚性钢管混凝土框架的有限元分析模型,进行了整体结构非线性全过程分析。通过荷载-位移曲线和破坏形式的比较,验证了有限元分析模型计算结果的准确性和可靠性。研究结果表明:半刚性钢管混凝土框架结构整体表现出良好的抗震性能和延性;有限元分析模型可以用于数值模拟地震作用下半刚性钢管混凝土框架结构的整体性能。
In order to study the seismic performance and failure mode of semi-rigid concrete filled steel tubular frame structure, horizontal low-cycle reciprocating loading tests of 2 榀 2-layer single span semi-rigid concrete filled steel tube (CFST) CFST frames are carried out. Hysteretic behavior, ductility and energy dissipation capacity are analyzed. The finite element analysis model of semi - rigid concrete filled steel tube (CFST) frame is established by ABAQUS software, and the entire structure nonlinear full - process analysis is carried out. The accuracy and reliability of the finite element analysis model are validated by the comparison of load-displacement curves and failure modes. The results show that the semi-rigid concrete-filled steel tube (CFST) frame shows a good overall seismic performance and ductility. The FEA model can be used to simulate the overall performance of the semi-rigid CFST frame structure under earthquake.