矮塔斜拉桥索梁活载比的特性研究  

Study on the Characteristics of Cable/Beam Live-load Ratio for Extradosed Cable-stayed Bridge

作　　者：陈从春[1] 

机构地区：[1]上海应用技术学院土木建筑与安全工程学院,上海200235

出　　处：《公路交通科技》2009年第1期99-103,共5页Journal of Highway and Transportation Research and Development

基　　金：上海应用技术学院引进人才启动基金资助项目(YJ2007-12)

摘　　要：索梁活载比是针对新桥型——矮塔斜拉桥提出的一个概念。为了进一步明确其力学特征,研究了索梁活载比与支承条件、主梁惯距、拉索倾角和面积等设计参数的关系,并详细讨论了活载比对矮塔斜拉桥的静力特性影响,即索梁活载比与挠度、弯矩、应力变幅的关系。研究表明,索梁活载比包含了矮塔斜拉桥的塔、梁、索以及支承条件等的主要结构特征,能反映结构特性,可以将其看作矮塔斜拉桥的结构特征参数,有助于认识斜拉体系桥的力学行为,同时有助于概念设计阶段的设计。The extradosed cable-stayed bridge is a new kind of bridge and for which the concept of cable/beam live -load ratio was put forward. In order to discover the mechanical characteristics of this type bridges, the relationship between the cable/beam live-load ratio and design parameters as girder inertia moment, cable angle and cable area were researched. And the interrelation between cable/beam live-load ratio and static properties （deflection, moment and stress amplitude） was discussed.It is proved that cable/beam live-load ratio, which can be looked as the characteristic parameter of extradosed cable-stayed bridge, is helpful to identify the mechanical behavior of the bridge, and to design on concept design stage.

关 键 词：桥梁工程 矮塔斜拉桥 索梁活载比 支承条件 静力特征 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]