外倾式非对称曲线拱桥力学特性分析  

Study on Mechanical Characteristics of Asymmetric Curved Arch Bridge with Outward-Inclined Ribs

作　　者：李晓斌[1] 严猛[1] 罗鹏军[1] 余取[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《铁道标准设计》2014年第8期81-84,共4页Railway Standard Design

基　　金：中央高校基本科研业务费百人计划项目资助(SWJTU09BR004)

摘　　要：针对一座外倾式非对称钢箱拱桥,通过利用桥梁结构专业软件Midas/civil建立其空间杆系有限元模型进行整体受力性能分析,探讨主要受力结构拱肋、吊杆以及钢箱主梁的力学特点;并通过外倾角的改变研究分析了吊杆内力随拱肋外倾角改变的变化规律,对于完善该类异型拱桥的设计理论、工程施工,确保结构安全、设计合理等方面都有一定的参考价值。Focusing on an outward-inclined asymmetric steel-box arch bridge, its spatial finite element model was established by employing the bridge engineering software MIDAS CIVIL so as to analyze the working stress state of the whole arch bridge. Meanwhile, the mechanical behaviors of the main load-bearing structures were researched, including the arch ribs, the suspenders and the steel box girder. Moreover, the relationship between the internal forces of the suspenders and the different camber angles of the arch ribs was obtained in this study. The research results can be used as reference for perfecting design theory and construction method of this kind of special-shaped arch bridge, for ensuring structural safety, for boosting reasonability of design, and so on.

关 键 词：外倾式拱桥 外倾角 吊杆内力 动力特性 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]