大跨度钢桁架拱桥的极限承载力研究  

Study of Ultimate Carrying Capacity of Long Span Steel Trussed Arch Bridge

作　　者：方明霁[1] 孙海涛[1,2] 

机构地区：[1]同济大学,上海200092 [2]上海市政工程设计研究总院,上海200092

出　　处：《世界桥梁》2010年第4期35-38,共4页World Bridges

摘　　要：在强地震设防区或桥梁承受铁路荷载且地质条件良好时,钢桁架拱桥是理想的大跨度桥梁选择方案。以朝天门大桥和大宁河大桥为背景,从边界条件、初始状态、荷载要素等几个关键影响参数着手,对大跨度钢桁架拱桥的极限承载能力进行参数研究,指出活载的布置形式、侧向风荷载及不同的约束条件对钢桁架拱桥的极限承载力有较大影响。The steel trussed arch bridge is an ideal bridge type selection for long span bridges to be built in the fortification region of strong earthquake or under the condition that the bridges will carry railway load and the geology at bridge sites is good.With reference to the Chaotianmen Bridge and Daning River Bridge,the parametric study of the ultimate carrying capacity of long span steel trussed arch bridge is conducted in consideration of several critical influential factors like the boundary conditions,initial status and load and the considerable influences of the live load arrangement,lateral wind load and different restraint conditions on the ultimate carrying capacity of the arch bridge are also pointed out.

关 键 词：大跨度桥梁 钢桁架拱桥 极限承载力 Arch Span Long ULTIMATE Carrying Capacity 极限承载能力 铁路荷载 朝天门大桥 约束条件 影响参数 选择方案 地质条件 初始状态 参数研究 布置形式 边界条件 强地震 风荷载 

分 类 号：U441[建筑科学—桥梁与隧道工程]