考虑竖向地震作用的拱式廊桥的地震响应分析

本文以某大型商业拱式廊桥工程实例为依托，利用有限元软件分别建立了整桥模型和不考虑上部建筑结构的桥梁模型以及不考虑下部桥梁结构的建筑模型，并计算了各自的自振动力特性，在此基础上通过反应谱方法分析了同时考虑水平地震作用和竖向地震作用的廊桥主拱圈和上部建筑结构柱的地震响应以及不同模型计算结果的差异，以此研究桥梁结构与建筑结构的耦合作用，为廊桥的抗震设计或分析提供一定的参考依据。

Seismic response analysis of arch covered bridge considering vertical seismic action

Based on a large commercial arch covered bridge project，this paper established the whole bridge model，the bridge model without superstructure and the building model without substructure by using finite element software，and calculated their natural vibration dynamic characteristics. On this basis，the seismic response of the main arch ring and superstructure column of the covered bridge considering both horizontal seismic action and vertical seismic action and the differences of results of different models were analyzed through the response spectrum analysis method，so as to study the coupling effect between the bridge structure and the building structure，and provide a certain reference basis for the seismic design or analysis of the covered bridge.