异型斜拉桥背索的型变效应  

Back cable type-variable-effect of special-shaped cable stayed bridge

作　　者：任伟 盖轶婷[2] 兰彬[1,3] 

机构地区：[1]旧桥检测与加固技术交通行业重点实验室,陕西西安710064 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075 [3]山东高速集团有限公司,山东济南518049

出　　处：《铁道建筑》2015年第8期13-15,共3页Railway Engineering

基　　金：国家自然科学基金项目(51308056);2012年交通运输部应用基础研究项目(2012319812100);陕西省交通运输厅2014年度交通科研项目(14-17k);广东省交通运输厅科技项目(2011-02-034)

摘　　要：为研究空间扭背索斜塔斜拉桥与常规布索斜拉桥在力学性能上的差异,本文以一独柱斜塔空间扭背索斜拉桥为依托,采用数值算法,通过变换背索布索方式,对空间扭背索与扇形背索两种布索方式斜拉桥在静力性能、动力特性、稳定性方面的差异进行对比分析。研究结果表明:空间扭背索布索方式易造成索力分布不均匀,主梁弯矩、应力偏大等问题;相对于扇形背索,空间扭背索布索方式的斜拉桥整体刚度较小;稳定性方面二者区别不大。总体而言,空间扭背索斜拉桥在受力上基本合理,但是在获得一定视觉效果的同时,其力学性能有所降低。The performance difference between cable-stayed bridge with space-twisting back cables and conventional cable-stayed bridge was compared. A space-twisting back cable stayed bridge with a leaning tower was studied using numerical analysis. With the change of the layout of back cables, the static performance, dynamic characteristics and the stability of the two Wpes of cable-stayed bridges were different. By comparison, the disadvantages of the space- twisting back cable stayed bridge include uneven distribution of cable force, larger moment and stress in girders and lower stiffness. But the stability of the two types of bridges is almost the same. In general, the performance of the space-twisting back cable stayed bridge is reasonable. As the sacrifice for amazing vision beauty, its performance is not as good as that of the conventional cable-stayed bridge.

关 键 词：桥梁工程 空间扭背索 扇形背索 静力性能 动力性能 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]