混合梁斜拉桥钢混结合部的合理位置  

Determination of Rational Steel-concrete Connection Position for Hybrid Girder Cable-stayed Bridge

作　　者：刘高[1] 唐亮[1] 谭皓[1] 吴文明[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《公路交通科技》2010年第6期52-57,共6页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(200731849405)

摘　　要：以主跨926 m的湖北鄂东长江公路大桥为例,通过有限元计算和参数敏感性分析,对混合梁斜拉桥钢混结合部的合理位置选择方法进行了较系统的研究。分析结果表明,利用斜拉桥索塔只承受轴力、不承担弯矩的理想成桥恒载状态,采用主梁弯曲应变能作为主要指标;同时考虑在运营状态汽车活载下的结合部局部弯矩、斜拉索索力及在恒载+活载下的支墩反力分布,是从结构受力性能上得到公路混合梁斜拉桥结合部合理位置的有效方法。此外,混合梁斜拉桥结合部合理位置选择还应综合考虑施工、经济等因素。The method of determining the steel-concrete connection position for hybrid girder cable-stayed bridge was investigated by finite element and parameter sensitivity analysis,illustrated by the example of Hubei Edong Yangtze River Bridge with 926 m main span.The analysis results show that it is an effective mthod for hybrid girder cable-stayed highway bridge from the view of mechanical property that the bending strain energy of main girder where the pylons were assumed to only carry axial force but does not to bear bending moment at the ideal dead-load state was employed as the primary index,considering the bending moment in the connection part and cable forces under live load as well as the support reaction under dead load plus live load.Additionally,construction convenience and economic benefit deserve more attention.

关 键 词：桥梁工程 混合梁斜拉桥 钢混结合部位置 有限元方法 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]