半刚性钢管混凝土框架抗震性能试验研究

Experimental research on seismic behavior of semi-rigid CFST frames

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。

To investigate the seismic behavior and failure modes of semi-rigid concrete-filled steel tubular( CFST)frames,quasi-static tests on two two-story and one-bay CFST frames have been conducted. The hysteretic performance,ductility and energy dissipation capacity of the specimens were investigated. The analysis model was established using ABAQUS software to analyze the completely nonlinear process of the structures. By comparing the test and predicted results of load-horizontal displacement curves and failure modes,the accuracy and reliability of the model were verified. It is concluded that the semi-rigid CFST frames exhibit good seismic behavior and ductility. The analysis model can be used to simulate the whole behavior of semi-rigid CFST frames.