润扬悬索桥桥址区韦帕台风特性现场实测研究  

FIELD MEASUREMENTS ON WIND CHARACTERISTICS OF TYPHOON WIPHA AT THE RUNYANG SUSPENSION BRIDGE

作　　者：王浩[1] 李爱群[1] 黄瑞新[1] 谢静[1] 谢以顺[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《工程力学》2009年第4期128-133,138,共7页Engineering Mechanics

基　　金：国家高技术研究发展计划(863计划)项目(2006AA04Z416);国家杰出青年基金项目(50725828);国家自然科学基金重点项目(50538020);国家自然科学基金青年基金项目(50378017);国家教育部博士点基金项目(200802861012)

摘　　要：润扬悬索桥地处我国东部沿海地区,自2005年建成通车之后每年均有台风经过。为了分析该桥桥址区的实际台风特性,建立桥址区台风特性数据库,在大桥南塔塔顶安装了超声风速仪进行桥址区风特性现场实测。2007年9月台风"韦帕"袭击江苏东部时,风速仪记录了经过该桥南塔塔顶的三维强风样本。通过对实测韦帕台风数据的分析,得到了10min平均风速和风向、紊流强度、阵风因子、紊流积分尺度以及紊流功率谱密度函数等强风特性。结合与桥址区"麦莎"台风特性实测结果及相关规范建议值的对比,总结了桥址区的台风特性及其规律。研究结论为大桥的抗风安全性评价提供了可靠依据,同时可为该地区其它工程结构的抗风研究提供参考。Located in the coastal aera of eastern China, the Runyang Suspension Bridge （RSB） has been suffered from the typhoons every year after the opening of the bridge in 2005. In order to gain the real typhoon characteristics at the RSB and find the typhoon characteristic database, an ultrasonic anemometer has been installed on the top of the south tower. When typhoon Wipha passed through Jiangsu in Septemper 2007, the 3-dimensional strong wind data was wholly recorded by the anemometer. The measurement data are analyzed to obtain the mean wind speed and the direction, the turbulence intensity, the gust factors, the turbulence integral length and power spectrum, etc. By comparing with the wind characteristic analytical results of typhoon Matsa and the advice values of corresponding codes, the characteristics and rules of typhoons at the RSB area is summarized. The results can provide reliable basis for the wind resistance evaluation of RSB, and have reference values for the wind resistance study of other engineering structures in the region.

关 键 词：悬索桥 风特性 台风 韦帕 现场实测 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U442.55[交通运输工程—道路与铁道工程]