山区峡谷大跨钢桁梁桥抗风特性试验研究  

Wind resistance tests for long-span steel truss bridges across gorges of mountainous area

作　　者：王凯[1] 廖海黎[1] 刘君[1] 

机构地区：[1]西南交通大学风工程试验研究中心,成都610031

出　　处：《振动与冲击》2014年第19期169-174,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51278435)

摘　　要：山区气象条件非常复杂,对跨越山区峡谷的大跨桥梁将产生非常不利的影响,山区大跨桥梁的抗风问题已成为山区大跨桥梁设计中的重要考虑因素。针对桥梁抗风特性,首先介绍了山区峡谷桥梁设计风参数的选取方法和结果,其次介绍了两座钢桁梁桥节段模型风洞试验的过程和结果,然后针对主梁出现的风致振动进行了一系列详细的优化试验,最后对优化试验的各种方案进行对比分析,选择出抗风特性最优的抑振措施,满足了桥梁抗风设计的要求,为以后类似桥梁的设计提供参考和依据。Wind-resistant performances of long-span bridges become important issues in the design of long-span bridges due to complicated meteorological conditions in mountainous area that may have very negative impacts on long-span bridges.Selecting methods and results of wind parameters of bridges in a mountainous valley were firstly introduced here. Then,the process and results of section model tests of the two steel truss bridges were presented.Next,a series of optimization tests were conducted for the wind-induced vibration of the main beam.The analysis of all the optimization tests was made to select the best measure for vibration suppression.The study results not only met the requirements of bridge wind-resistance design,but also provided a reference and basis for the design of similar bridges in future.

关 键 词：山区峡谷 钢桁梁 风洞试验 颤振 优化试验 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]