基于行波效应的矮塔斜拉桥抗震分析

Seismic Analysis of Low Pylon Cable-Stayed Bridge Based on Traveling Wave Effect

摘要: 矮塔斜拉桥又称部分斜拉桥，是一种介于连续刚构桥和常规斜拉桥之间的组合桥型。大跨矮塔斜拉桥作为重要公路桥梁，投资较大，一旦在地震中遭到破坏，将会造成巨大的经济损失。所以大跨矮塔斜拉桥的抗震性能应该得到充分的研究。本文以某大桥为工程实例，考虑其所处位置的地质条件及地形条件，建立有限元模型对结构进行弹塑性动力分析，考虑行波效应因素，讨论其对结构地震反应性能的影响，总结出相应的规律。

Abstract: The low tower cable-stayed bridge, also known as the partial cable-stayed bridge, is a combined bridge between the continuous rigid frame bridge and the conventional cable-stayed bridge. As a major highway bridge, the large-span low-rise cable-stayed bridge has a large investment and will cause huge economic losses once it is destroyed in the earthquake. Therefore, the seismic performance of long-span low-rise cable-stayed bridges should be fully studied. Taking a bridge as an engineering example, considering the geological conditions and topographic conditions of its location, the finite element model is established to analyze the elastoplastic dynamics of the structure. Considering the traveling wave effect factors, the influence of the seismic response on the structure is discussed, and the corresponding laws are summed up.