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.
出处
《公路交通科技》
CAS
CSCD
北大核心
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)
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
bridge engineering
extradosed cable-stayed bridge
cable/beam live-load ratio
support condition
static property
