抗风缆布置形式对人行悬索桥静风稳定性影响分析  

Influence of Wind Resistant Cable Layout on Static Wind Stability of Pedestrian Suspension Bridge

作　　者：向思宇 胡习兵[1] XIANG Siyu;HU Xibing(College of Civil Engineering,Central South University of Forestry and Technology,Changsha,Hunan 410004,China)

机构地区：[1]中南林业科技大学土木工程学院

出　　处：《公路工程》2019年第6期89-93,共5页Highway Engineering

基　　金：中南林业科技大学研究生科技创新基金项目(20183024);湖南省研究生科研创新项目(CX2018B455)

摘　　要：为研究不同抗风缆布置形式对人行悬索桥静风稳定性的提升效果,以某主跨为380 m双塔地锚式人行悬索桥为例,分别对其采用不同的抗风缆布置形式,并通过有限元进行了动力特性分析;对设置了不同形式抗风缆的人行悬索桥进行了静风稳定性和位移响应分析。分析结果表明:设置空间抗风缆对结构竖弯基频提升明显;空间斜拉式抗风缆对人行悬索桥抗风稳定性作用效果较好;空间直拉式抗风缆更有助于减少加劲梁受风荷载后的侧向位移。In order to study the effect of different wind resistant cable layout on the static wind stability of pedestrian suspension bridge,taking a main span for 380m Twin Towers anchorage suspension bridge as an example,the different arrangement forms of wind resistant cable are used respectively,and the dynamic characteristics are analyzed by the finite element method.The stability of the static wind and the displacement response are analyzed.The results show that the spatial wind resistant cable is more effective in improving the base frequency of the structure,and the spatial cable tension resistant cable has better effect on the wind stability of the pedestrian suspension cable,and the spatial direct tension cable is more helpful to reduce the lateral displacement of the stiffened beam after the wind load.

关 键 词：抗风缆 人行悬索桥 静风稳定 动力性能 

分 类 号：U44[建筑科学—桥梁与隧道工程]