闵浦二桥地震反应分析

发布时间：2018-05-09 13:53

本文选题：斜拉桥 + MIDAS/Civil　；参考：《南京航空航天大学》2014年硕士论文

【摘要】：近年来，随着国民经济的迅猛发展，越来越多的大跨度桥梁相继投入使用，而斜拉桥是其中最具有竞争力的桥型，渐渐成为了交通运输的一项枢纽工程。地震作为一种破坏力极强的自然灾害，对人们的生命安全造成了极大的威胁，尤其是当桥梁受到地震破坏后，带来的损失就难以想象了。所以为了确保这类桥梁的安全运营，对桥梁进行系统的地震反应分析是十分有必要的。本文运用大型有限元软件MIDAS/Civil，对上海闵浦二桥进行了地震反应分析，主要研究内容如下：（1）建立了上海闵浦二桥的有限元计算模型，并对桥梁进行了动力特性分析；（2）采用反应谱法对桥梁进行地震反应分析，利用CQC振型组合方法，分别进行顺桥向、横桥向、竖向以及两个最不利组合下的地震反应分析；（3）对上海闵浦二桥进行时程反应分析，根据反应谱法得出的初步结论，在关键部位进行三个独立方向以及组合方向的地震反应分析，，得出较为准确的分析结果，并选取主塔关键部位进行抗剪能力验算，校核强度；（4）对闵浦二桥关键的主塔进行了横向pushover静力弹塑性分析，对其抗震性能作出了一些评估，为实际工程提供参考。
[Abstract]:In recent years, with the rapid development of national economy, more and more long-span bridges have been put into use, among which cable-stayed bridges are the most competitive type, and gradually become a transportation hub project. Earthquake, as a kind of natural disaster with strong destructive power, poses a great threat to the safety of people's lives, especially when the bridge is damaged by earthquake, the damage caused by it is difficult to imagine. So in order to ensure the safe operation of this kind of bridge, it is necessary to analyze the seismic response of the bridge systematically. In this paper, a large finite element software Midas / Civil is used to analyze the seismic response of Minpu Bridge in Shanghai. The main research contents are as follows: 1) the finite element model of Shanghai Minpu second Bridge is established, and the dynamic characteristics of the bridge are analyzed. (2) using the response spectrum method to analyze the seismic response of the bridge, and using the CQC mode combination method, the seismic response analysis is carried out respectively in the direction of the bridge, the direction of the transverse bridge, the vertical direction and the two most unfavorable combinations. According to the preliminary conclusion of the response spectrum method, the seismic response analysis of three independent directions and the combination direction is carried out at the key position, and the results are more accurate. The key parts of the main tower are selected to check the shear capacity and check the strength. 4) the lateral pushover static elastoplastic analysis of the key main tower of Minpu second Bridge is carried out, and some evaluation of its seismic performance is made, which provides a reference for practical engineering.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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