四塔单索面矮塔斜拉桥结构参数敏感性分析  

Sensitivity Analysis for the Structural Design Parameters of Four-tower Extradosed Cable-stayed Bridge with Single Plane

作　　者：刘沐宇[1] 孙向东[1,2] 涂开智[1] 袁卫国[2] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070 [2]广东省公路勘察规划设计院,广东广州510507

出　　处：《华中科技大学学报（城市科学版）》2009年第4期10-14,35,共6页Journal of Huazhong University of Science and Technology

基　　金：武汉市建设科研项目(200619)

摘　　要：矮塔斜拉桥是介于连续梁式桥和斜拉桥之间的一种组合体系桥梁,本文以在建的江肇高速公路西江特大桥为工程背景,建立全桥三维有限元模型,对多塔单索面矮塔斜拉桥的塔高、无索区长度和边中跨比进行了参数敏感性分析,得到了主要结构参数变化时主梁关键部位荷载效应的变化规律,分析结果对同类桥型的设计具有一定的参考意义。With the support of the Xijiang Bridge in Jiang-Zhao Highway which is being built, this paper established three-dimensional finite element model of the bridge according to the structure characteristics of extradosed cable-stayed bridge with multi-tower. Sensitivity analysis of main parameters was made which included the height of towers,the length of non-stayed segments and the ratio of center span to side span. A variation law of the response under loads in the key parts of main girder was obtained, which would have significance for design reference of the similar bridge in a certain degree.

关 键 词：矮塔斜拉桥 无索区长度 边中跨比 参数敏感性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]