台风对大跨度钢桁拱桥抗风性能的影响  

Effect of Strong Typhoon on Wind-induced Performance of Long-Span Steel Truss Arched Bridge

作　　者：王小松[1,2] 赵林[2] 葛耀君[2] 朱乐东[2] 

机构地区：[1]重庆交通大学桥梁系,重庆400074 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2009年第1期13-19,25,共8页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金重点资助项目(90715039);国家"八六三"高技术研究发展计划资助项目(2006AA11Z108);国家自然科学基金资助项目(50408035);上海科委交叉领域创新团队培养计划资助项目(03DZ12039)

摘　　要：采用Monte-Carlo台风随机模拟算法的结果和风荷载规范良态气象风环境参数建议取值,在大气边界层风洞中利用被动紊流发生装置再现了良态和台风2类气象条件下的风环境特征.以地处珠江流域台风多发区的广州新光大桥为例,采用全桥气弹模型风洞试验和基于主梁及肋拱测力试验的3维静风稳定性数值计算等手段,详细分析了中承式大跨度连续刚桁拱桥在2类风环境中平均风位移、风致抖振响应和3维稳定性的差异,分析过程比较了2类气象条件下重现期设计风速、平均风和紊流度剖面等因素对于拱桥抗风性能的影响.Based on the Monte-Carlo typhoon simulation results of typhoon field characteristics and the wind parameters of normal climate field from wind loading Codes, both the typhoon and the normal climate field are simulated in the atmospheric boundary layer wind tunnel by the passive turbulence generators. Taken as an example, wind resistant performance of Guangzhou Xinguang Bridge, a long-span arched bridge located in the south China's Mainland, is compared under the above two climate modes based on the full aeroelastic model wind tunnel testing and the three- dimensional numerical algorithm of static wind displacement and its stability with the help of static aero dynamic force coefficients of sectional model of the main girder and the arc rib in mid-span. In the process of analysis, more emphases are focused on the effects of design wind speeds of return period, vertical profiles about average wind velocity and turbulence intensity on arc bridge wind-resistant performance.

关 键 词：钢桁拱桥 良态气象 台风气象 抗风性能 风洞试验 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]