斜靠式系杆拱桥静力特性及稳定性分析  

Analysis on Static Characteristic and Stability of Leaning Bowstring Arched Bridge

作　　者：王艳军[1] 孙书亭[1] 

机构地区：[1]中国市政工程华北设计研究总院,天津市300074

出　　处：《城市道桥与防洪》2014年第7期153-156,14,共4页Urban Roads Bridges & Flood Control

摘　　要：以某斜靠式系杆拱桥为工程背景,采用Midas Civil建立有限元模型对其静力特性和稳定性进行了分析研究。结果表明:拱肋、系梁及吊杆的应力和吊杆应力幅均满足设计要求;风撑的设置不仅提高了结构的稳定性,还改变了结构的失稳特征;结构失稳以拱肋的面外扭转失稳为主。Taking a leaning bow string arched bridge as the engineering background,the MIDAS Civil is used to establish the finite element model to analyze and study its static characteristic and stability. The result shows that the stresses of arch rib, bowstring and hanger rod, and hanger rod stress amplitude can satisfy the design requirements. The wind brace can not only improve the structural stability, but also change the structural instability property.The structural instability is mainly the arch rib in the out of plane torsional instability.

关 键 词：斜靠式系杆拱 无推力 应力 应力幅 稳定性分析 静力特性 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]