上海交通大学学报

上海交通大学学报 >

2022 , Vol. 56 >Issue 4: 486 - 497

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2020.381

交通运输工程

结构拟静力分量对中低速磁浮车-桥系统地震响应的影响

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  • 上海交通大学 船舶海洋与建筑工程学院,上海 200240
黄凤华 (1991-),男,江苏省南通市人,博士生,主要从事车桥耦合振动研究.

收稿日期: 2020-11-16

  网络出版日期: 2022-05-07

基金资助

国家重点研发计划(2016YFB1200602-28);国家重点研发计划(2016YFB1200601-B27)

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Influence of Structural Pseudo-Static Components on Seismic Responses of Low-Medium Speed Maglev Vehicle-Bridge System

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  • School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2020-11-16

  Online published: 2022-05-07

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摘要

与传统桥梁抗震分析关注系统的相对运动不同,车-桥系统的抗震分析关注车辆系统的绝对运动,需考虑结构拟静力分量的影响.为探讨结构拟静力分量对中低速磁浮车-桥系统地震响应特性的影响,以某典型中低速磁浮线路为研究对象,考虑基于比例积分微分 (Proportional Integral Derivative, PID) 主动悬浮控制的磁浮车-桥耦合关系,采用相对运动法和直接求解法,分别在相对坐标系和绝对坐标系下建立中低速磁浮车-桥系统地震响应分析模型.在此基础上,重点探讨了结构拟静力分量对磁浮间隙、车辆系统以及桥梁结构动力响应的影响规律.结果表明:结构拟静力分量对车辆系统的动力响应影响较大,忽略结构拟静力分量会严重低估车辆的加速度响应,差异值最大可达447%;结构拟静力分量对桥梁结构位移响应的影响有限;建议采用考虑结构拟静力分量的绝对位移法处理磁浮车-桥系统中的地震输入.

关键词： 中低速磁浮交通; 车桥系统; PID主动控制; 地震响应; 结构拟静力分量

本文引用格式

黄凤华, 程斌, 滕念管 . 结构拟静力分量对中低速磁浮车-桥系统地震响应的影响[J]. 上海交通大学学报, 2022 , 56(4) : 486 -497 . DOI: 10.16183/j.cnki.jsjtu.2020.381

Abstract

Unlike the traditional seismic analysis on bridge engineering which mainly concerns the relative motion, the seismic analysis of vehicle-bridge system focuses more on the absolute motion of the vehicle system, where the pseudo-static components need to be considered. In order to study the effect of structural pseudo-static components on the seismic responses of low-medium speed maglev vehicle-bridge system, the discussion relying on a typical low-medium speed maglev line was implemented. Considering the vehicle-bridge coupling relationship based on the proportional integral derivative (PID) active suspension control, two dynamic models for the low-medium speed maglev vehicle-bridge system subjected to earthquake were relatively established in the relative coordinate and the absolute coordinate, and the seismic forces were correspondingly solved by employing the relative motion method and the direct solution method. A case study was subsequently conducted, where the effect of structural pseudo-static components on dynamic responses of the vehicle-bridge system, including the maglev gap, the vehicle system and the bridge was further analyzed. The results show that the influence of pseudo-static components on the dynamic responses of the vehicle system is quite significant. Ignoring the pseudo-static components could seriously undervalue the dynamic responses of the vehicle system, of which the difference could be as high as 447%. Compared to the vehicle system, the influence of pseudo-static components on the vertical and transversal displacement responses of the bridge is fairly limited. Therefore, it is suggested that the absolute displacement method which takes the pseudo-static components into account should be adopted to deal with the seismic excitation in the maglev vehicle-bridge system.

Key words： low-medium speed maglev transport; vehicle-bridge system; PID active control; seismic responses; structural pseudo-static components

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