大跨度连续梁桥地震反应谱一致激励分析

Long-span Continuous Girder Bridge Seismic Response Spectra Consistent Excitation Response Analysis

近年来,地震多发给我国人民生命和财产带来严重威胁。桥梁结构是道路交通系统的重要结构,是交通运输系统的枢纽工程。桥梁结构的破坏,不仅会直接导致较大的经济损失,而且还会影响灾后重建和生产恢复等工作。本文以六库怒江大桥为研究背景,采用有限元软件MIDAS/CIVIL,建立三跨混凝土连续梁桥有限元模型,进行反应谱一致激励。经过分析得出:在进行大跨度连续梁桥梁的反应谱分析时,应考虑多维地震动输入。

In recent years, earthquakes have caused serious threats to the lives and property of our people. Bridge structure is an important structure of road traffic system, and is a hub project of transportation system. The damage of bridge structure will not only lead to greater economic loss, but also affect reconstruction after disaster and recovery of production. Based on the research background of the six Treasury Nu River bridge, the finite element model of three span concrete continuous beam bridge was established by using the finite element software MIDAS/CIVIL, and the response spectrum was unanimously stimulated. It was concluded that multidimensional seismic input should be considered when analyzing the response spectrum of long-span continuous girder bridges.