大跨径斜拉桥静力及特征值分析

Analysis of static force and eigenvalue of cable-stayed bridge

以某大跨径斜拉桥为研究对象,利用Midas Civil建立全桥有限元模型,对该桥进行静力分析提取该斜拉桥在荷载作用下的结构响应并对其结果进行分析,利用多重Ritz方法对全桥进行特征值分析作为评价该桥抗震性能的重要指标,最后对全桥进行特征值分析评价桥梁在受力时的各向稳定性能。

This article takes a long span cable-stayed bridge as the research object,uses Midas Civil to establish a full bridge finite element model,and then performs static analysis on the bridge to extract the structural response of the cable-stayed bridge under load and analyze the results.Using the multiple Ritz method to analyze the eigenvalue of the whole bridge as an important index to evaluate the seismic performance of the bridge,and finally analyze the eigenvalue of the whole bridge to evaluate the stability of the bridge under force.