【摘要】 本文建立了方钢管混凝土框架结构的三维非线性有限元分析模型,用以研究方钢管混凝土框架在低周反复荷载作用下的抗震性能。该模型考虑了钢与混凝土的粘结滑移作用。通过与方钢管混凝土框架结构在低周反复荷载作用下试验所得的滞回曲线和刚度退化曲线的对比,发现该模型的计算结果较为精确,可以应用于方钢管混凝土框架的结构分析中。同时由试验和有限元分析计算的结果也可以得出结论,方钢管混凝土框架具有较好的抗震性能。更多还原

【Abstract】 A 3-D nonlinear finite element model of concrete-filled rectangular tubular frame is proposed in the paper to research the seismic behavior of this type of structure under low-reversed cyclic loading. The action of bond-slip between steel and concrete has been taken into account in the model. Compared with the experimental hysteresis curve and stiffness degradation curve, the computational results are found to be accurate, which shows that this model proposed in the paper can be applied in structure analysis of concrete-filled rectangular tubular frames. From the analysis of test results and theoretical calculation ones, it can be concluded that concrete-filled rectangular tubular frame has good seismic performance.更多还原