关键词: 横向碰撞, 连续梁桥, 有限元模型, 动力响应, 易损性

Abstract: The study of beam dynamic response is an important branch in the field of bridge engineering, especially when considering lateral collision effects. In order to study the effect of lateral collision on the dynamic response of continuous beam bridges, an open system for earthquake engineering simulation (OpenSees) finite element software was used to build a finite element model of the entire bridge. The dynamic response and vulnerability changes of the bridge were compared and analyzed with and without lateral collision. The results show that when the peak ground acceleration is 1.0 gal, the probability of minor and complete damage to the support is 0.97 and 0.71, respectively, without lateral collision, and 0.92 and 0.65, respectively, with lateral collision. The lateral collision effect limits the relative displacement of the support through the limiting effect of the stopper, thereby reducing the probability of damage. This has practical guidance significance for the evaluation, reinforcement, and maintenance of bridges in seismic design.

Key words: lateral collision, continuous beam bridge, finite element model, power response, vulnerability