中文摘要：

近年来,大量连续梁桥在强烈地震中出现了构件破坏甚至发生了整体倒塌的现象,其中桥梁上部结构的落梁又是引起桥梁发生连续倒塌的一个关键因素。利用有限元软件ABAQUS,采用合理的材料和结构模型,对一座小半径曲线梁桥建立模型并对其从发生落梁到连续倒塌的整个过程进行细致地模拟和分析。结果显示,落梁的碰撞和桥梁的倾斜使得桥墩接连破坏,最终导致桥梁连续倒塌,桥墩底部和系梁处易发生塑性破坏,需要对其进行针对性的加固或抗震设计。

英文摘要：

The progressive collapse of bridges caused by falling beams often occurs in earthquake. With the finite element software ABAQUS,a curved continuous girder bridge model was built by using applicable constitutive model of material,bearing and collision. Then its procedure of the progressive collapse is simulated. It is caused by unseating and the lean of bridge. The damage of the bottom and the tie beam of piers is more serious,we should strengthen them in design or reinforce them.