曲线桥抗倾覆稳定性分析  

Analysis of Overturning Stability of Curved Bridge

作　　者：宋福春 李孟臣 张国强 SONG Fu-chun;LI Meng-Chen;ZHANG Guo-Qiang(School of Transportation Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

机构地区：[1]沈阳建筑大学交通工程学院

出　　处：《公路》2018年第4期65-69,共5页Highway

基　　金：国家自然科学基金项目,项目编号51178279/E080801;辽宁省高速公路管理局项目,项目编号201408;住房与城乡建设部项目,项目编号2015-K5-021

摘　　要：曲线桥受力复杂,在“弯扭”耦合作用下,容易倾覆。近几年这种桥梁形式出现了多次严重的倾覆事故,在这种情形下,如何保证现役桥梁正常使用成为了急需解决的问题。根据曲线桥弯扭耦合的受力特点,通过规范提供的抗倾覆稳定性系数计算公式进行抗倾覆验算。以某匝道桥梁为例,利用MIDAS/Civil建立有限元模型进行分析计算。通过对车辆超载及支座预偏心大小等影响因素的分析,根据分析结果,得出了一定的结论,对曲线桥的设计等有一定的借鉴意义。The curved bridge has the characteristic of complex stress, it is easy for curved bridge to capsize in the ＂torsion＂ coupling. In this situation, how to ensure the normal use of the bridge operators is becoming an urgent problem. In this article, based on the mechanical characteristic of the curved beam, in order to analyse the ability of the overturning stability of curved bridge, the coefficient of overturning stability of the curved bridge is firstly calculated by the formulae provided by specification. A ramp is taken as a example to verify its ability of the overturning stability through the finite element software of MIDAS/Civil. Through an analysis of influence factor of the ability of the overturning stability of curved bridge, some conclusions are drawn which is meaningful to the design of the curved bridge.

关 键 词：曲线桥梁 抗倾覆 超载 稳定性 分析 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]