超大跨度混合梁斜拉桥非线性受力分析研究

为研究非线性因素对超大跨度混合梁斜拉桥的影响,结合鄂东长江公路大桥,对该类桥梁在多阶段、多效应耦合影响下的非线性受力特性进行系统、定量的分析。采用RM2006建立鄂东长江公路大桥主桥模型,分析该桥在施工、成桥、运营阶段中不同非线性因素及不同荷载作用下的非线性影响。分析结果表明:超大跨度混合梁斜拉桥在施工和成桥阶段均存在非线性影响;施工阶段结构在风荷载、温度荷载作用下的非线性影响较明显;成桥状态下钢箱梁、桥塔及斜拉索受几何非线性因素影响较明显,边跨混凝土箱梁受非线性效应与温度荷载效应耦合作用的影响较大。

Analysis and Study of Nonlinear Mechanical Behavior of Very Long Span Hybrid Girder Cable-Stayed Bridges

To study the influences of nonlinear factors on the very long span hybrid girder cable-stayed bridges,Edong Changjiang River Highway Bridge was cited as an example,the nonlinear mechanical behavior of the bridge of the same type under the multiple stages and multiple effect coupling influences were systematically and quantitatively analyzed.The program RM2006 was used to set up the model for the main bridge of the bridge,the nonlinear influences at the stages of construction,completion and operation of the ...