大跨度斜拉桥极限承载力的参数研究  

Parametric Study on Ultimate Load Capacity of Long-span Cable-stayed Bridges

作　　者：陈铁冰[1] 谭也平[2] 

机构地区：[1]深圳职业技术学院建工系,广东深圳518055 [2]深圳大学土木工程学院,广东深圳518060

出　　处：《交通标准化》2005年第6期40-42,共3页Communications Standardization

基　　金：建设部科技基金资助项目(04-2-083)

摘　　要：通过以一座大跨度斜拉桥作为计算模型,研究各种结构参数对斜拉桥极限承载力的影响,其研究表明,初始内力对斜拉桥极限承载力影响较大;在自重荷载作用下,斜拉桥极限承载力与结构的失效路径有关;几何非线性效应对斜拉桥极限承载力影响不大,斜拉桥达到极限承载力主要由材料非线性引起。The elastic-plastic hinge method for analysis of physical nonlinearity of long-span cable-stayed bridges is utilized including geometrical nonlinearity effects in this paper,and ultimate load capacity is also studied when considering several parameters. The results show that the initially inner forces have greatly influence on the ultimate load capacity of cable-stayed bridges. The ultimate load of cable-stayed bridges is determined by the failure path of structure under the dead load. The geometrical nonlinearity effects can be neglected in calculating ultimate load. The ultimate load of long-span cable-stayed bridges is generated by physical nonlinearity.

关 键 词：大跨度斜拉桥 极限承载力 参数影响 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]