非对称混合梁斜拉桥合理成桥状态及静力特性分析  

Analysis of Rational Completion Status and Static Force Behavior of an Asymmetric Hybrid Girder Cable-Stayed Bridge

作　　者：贺鹏[1] 丁望星[1] 

机构地区：[1]湖北省交通规划设计院,湖北武汉430051

出　　处：《桥梁建设》2012年第1期54-59,共6页Bridge Construction

摘　　要：荆岳长江公路大桥主桥为(100+298)m+816m+(80+2×75)m双塔非对称混合梁斜拉桥。在分析该桥主桥静力平衡特性的基础上,总结该类桥梁合理成桥状态的确定原则,并以此为指导采用RM2006空间杆系程序对该桥主桥进行结构总体静力分析。分析结果表明:该桥主梁钢箱梁段运营阶段上、下缘应力均以压应力控制,最大压应力分别为-135.40MPa和-134.88MPa,控制值基本相当;混凝土梁段上缘压应力最大为-17.32MPa,无拉应力出现;桥塔最大压应力为-15.56MPa,均满足规范要求。The main bridge of Jingyue Changjiang River Highway Bridge is a double-pylon asymmetric hybrid girder cable-stayed bridge with span arrangement（100＋298） m＋816 m＋（80＋2×75） m.On the basis of analysis of the static force equilibrium behavior of the main bridge,the principles for determination of rational completion status of the bridges of the same type were summarized,the principles were then taken as the guide and the structural global static force of the main bridge was analyzed,using the RM2006 Spatial Link Program.The results of the analysis show that at the operation stage,the stress of the upper and lower flanges of the steel box girder section of the main girder should be controlled by way of compressive stress control.The greatest compressive stress thereof is respectively-135.40 MPa and-134.88 MPa and the control values of the stress are almost equivalent.The greatest compressive stress of the upper flange of the concrete girder section is-17.32 MPa with no tensile stress and the greatest compressive stress of a pylon is-15.56 MPa,which can all meet the relevant requirements in the codes.

关 键 词：斜拉桥 混合梁 静力分析 索力优化 有限元法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]