钢管混凝土拱桥在车辆荷载作用下的非线性动力响应分析

Dynamic nonlinear response analysis of arch bridges of concrete filled steel tube due to the vehicle

根据随动硬化理论和钢管混凝土组合材料恢复力模型 ,提出了复杂应力状态下钢管混凝土组合材料的弹塑性应力应变关系。采用非线性有限元法 ,对一钢管混凝土拱桥进行移动车辆荷载作用下车—桥体系的动力响应分析 ,并进一步研究钢管混凝土组合材料进入塑性后对体系振动的影响 ,取得了较满意的结果 ,为钢管混凝土拱桥动力性能评价提供参考。

According to the kinematic hardening theory and the cyclical loading model of concrete filled steel tubular,authors present the relationship between stress and strain in the multi stress states to CFST. With the method of nonlinear finite element, a certain CFST arch bridge is researched on its dynamic nonlinear response due to the moving vehicle, and the deep investigation of the effect of nonlinear material behavior of CFST on the vibration of vehicle bridge has been performed successfully to get excellent results.