负弯矩区异型钢-混凝土组合岔梁受力性能分析  

Loading Capacity of Composite Box Girder Intersection with Special-Shaped Steel and Concrete in Negative Bending Region

作　　者：王宝强[1] 李运生[2] 王元清[3] 

机构地区：[1]中铁大桥局集团第五工程有限公司,江西九江332000 [2]石家庄铁道学院土木工程分院,河北石家庄050043 [3]清华大学土木工程系,北京100084

出　　处：《重庆交通大学学报（自然科学版）》2009年第5期822-825,869,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：河北省自然基金项目(E2009000893)

摘　　要：目前,曲线梁和异型梁在城市立交和高速公路立交中被广泛采用,且向连续梁发展。连续异型梁桥结构复杂,研究其在各种荷载作用下的受力和变形特征对工程建设具有重要意义。在此通过有限元程序ANSYS建立板壳单元三维空间模型,对北京南站高架桥某联负弯矩区异型岔梁进行分析,重点分析了该异型岔梁在各种荷载作用下的变形和应力分布,提出了降低岔口处截面应力集中的措施,可为同类结构设计提供借鉴和参考。The curved beam and the special-shaped girder have been widely used in the urban and highway intersection recently, and are also inclined to the continuous special-shaped structure. The continuous special-shaped structure is complex, and the studies on its loading and deformation characteristics under different loads are of great significance for the engineering construction. One segment of composite box beam＇s special-shaped intersection of Beijing South Station Viaduct in negative bending region is analyzed by FEM software ANSYS. The behavior of the steel box-concrete composite girder at intersection is mainly analyzed, such as the stress and deformation behavior of the composite girder under different loads. And the measures to reduce the stress concentration are given, which offers references to the design of similar structures.

关 键 词：负弯矩区 异型岔口 应力分析 变形分析 

分 类 号：U448.2[建筑科学—桥梁与隧道工程]