近断层地震作用下高速铁路简支梁桥碰撞研究

The study on the collision of the simply supported girder bridge of the highway under the effort of the near-fault earthquake

结合近场地面运动改变结构响应的特点,研究了高速铁路简支梁桥在近场地震作用下的碰撞现象、计算模型以及碰撞力的传播路径,分析了这种梁间碰撞现象对桥墩、梁及支座的影响,指出碰撞现象对固定支座的影响较大。

Combining the characteristics of the changing structural response for the near-field motion, the paper researches on the collision phenomenon of the simply supported girder bridge of the highway under the effort of the near-fault earthquake, the calculating model and the propagation path of the collision force, analyzes the influence of the collision phenomenon between girders on piers, girders and support saddles and indicates that the fixed base is more influenced by the collision phenomenon.