空间主缆悬索桥非线性静风稳定分析  

Nonlinear Aerostatic Stability of Suspension Bridge with Spatial Main Cables

作　　者：欧阳克俭[1] 陈政清[1] 李红利[1] 韩艳[1,2] 

机构地区：[1]湖南大学风工程试验研究中心,长沙410082 [2]长沙理工大学土木与建筑学院,长沙410076

出　　处：《土木建筑与环境工程》2010年第3期83-87,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金重点项目(50738002);湖南省研究生科研创新项目(CX2009B075)

摘　　要：通过五分量天平测试得到了右汊桥节段模型的三分力系数。借助大型有限元分析软件ANSYS,采用修正的增量与内外两重迭代的方法,对右汊空间主缆悬索桥进行了三维静风荷载数值计算。数值计算结果表明采用空间主缆的右汊悬索桥相对于平行双主缆的悬索桥具有更为优秀的静风稳定性能。设计并加工了缩尺比为1:90.35的右汊桥全桥气弹模型,均匀流中全桥气弹模型的静风稳定性试验结果表明,静风失稳临界风速明显高于设计风速。The three-component coefficients of section model of You-Cha Bridge were obtained by using two five-component balances. And the three-dimensional aerostatic stability of You-Cha Bridge was analyzed based on the modified increment and inner-outer iteration method implemented in ANSYS. It is indicated that the aerostatic stability of You-Cha Bridge with spatial main cables is more excellent compared with those of suspension bridges which have two parallel main cables. A full nero-elastic model with geometrical scale of 1：90.35 was designed and used to experimentally determine the wind velocity inducing aerostatic divergence in smooth wind. And it is found that the critical wind velocity for attendant bridge is higher than the design wind velocity.

关 键 词：悬索桥 ANSYS 静风稳定 五分量天平 三分力系数 

分 类 号：U446.1[建筑科学—桥梁与隧道工程] U441.2[交通运输工程—道路与铁道工程]