蝴蝶拱桥稳定性分析  

On stability analysis of butterfly arch bridge

作　　者：弭坤 许冰 

机构地区：[1]西安公路研究院

出　　处：《山西建筑》2011年第19期159-161,共3页Shanxi Architecture

摘　　要：以西安市浐灞生态区一蝴蝶拱桥为工程背景,通过建立有限元计算模型,计算了该桥的稳定安全系数及不同设计参数下结构在恒载工况以及恒载+活载工况的失稳特征值,结果表明,拱肋的刚度对稳定性起着决定性作用;吊杆的布置形式只改变拱肋的面内刚度。Taking the butterfly arch bridge of Chanba ecological area of Xi＇an as the engineering background,the paper calculates the stable safety coefficient of the bridge by establishing the finite element calculation model,the dead load condition of the various design parameter and the instability characteristic value of the dead load and the live load condition,and proves the stiffness of the arch rib has the determined role of the stability,and illustrates the layout forms of the suspender can change the in-plane stiffness of the arch rib.

关 键 词：桥梁工程 外倾式拱桥 稳定性 设计参数 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]