【摘要】 采用组合单元和双单元法对钢管混凝土进行材料非线性分析,给出两种方法的恢复力模型曲线,并分别用这两种方法对某大跨度钢管拱桥进行非线性地震反应分析,结果表明,两种元法的分析结果比较接近,故都是非线性分析的有效方法;同线性分析结果相比较表明材料非线性对钢管混凝土拱桥的抗震性能影响是显著的。更多还原

【Abstract】 In this paper, material nonlinearity of CFST (concrete-filled-steel-tube) element is analyzed by combination element method and double element method, and the restoring force models of CFST material are given by the both methods. Nonlinear seismic response of CFST arch bridge is analyzed by the both methods. The results of the combination element method and the double element method are very approximate, and the both methods are effective methods of nonlinear analyses. Comparison with the result of linear analysis indicate that the effect of material nonlinearity on seismic performance of CFST arch bridge is notable.更多还原