机构地区: 同济大学土木工程学院桥梁工程系
出 处: 《公路交通科技》 2004年第9期47-51,共5页
摘 要: 随着斜拉桥跨径的不断增大,在设计和施工中必须考虑非线性因素对结构的影响。本文研究了非线性因素对超大跨度斜拉桥成桥时内力的影响,分析中同时考虑了拉索垂度效应、P Δ效应和大位移效应的影响。探讨了非线性因素对斜拉桥成桥时内力影响的机理,提出了减小超大跨度斜拉桥非线性影响的措施。 Because of the increase of main span of cable-stayed bridge,the influence of structural nonlinearities must be considered both in design and construction.In this paper the influence of structural nonlinearities on internal force of super-long span Cable-Stayed Bridge under completion stage is studied.The cable sag effect,the beam-column effect and the large displacement effect are taken into account in the study.As a result,mechanisms of influence of structural nonlinearities on internal force are discussed.Finally,the measures to reduce the influence of nonlinearities are presented.