Study on Wind Characteristics of Typhoon Muifa on the Sutong Bridge  

作　　者：XU Chaoran WANG Hao CHENG Huaiyu ZONG Zhouhong ZHANG Yufeng 

机构地区：[1]Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University [2]Jiangsu Transportation Research Institute Co., Ltd.

出　　处：《Wuhan University Journal of Natural Sciences》2013年第2期156-162,共7页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(50908046,50978056);the Teaching and Scientific Research Fund for Excellent Young Teachers of Southeast University(3205001101);the Basic Scientific andResearch Fund of Southeast University(Seucx-201106);the Priority Academic Program Development Foundation of Jiangsu Higher Education Institutions,China

摘　　要：As a cable-stayed bridge with the longest main span, the Sutong Bridge faces the threat of typhoons every year. Based on field measured data measured at the top of the tower and at the mid-span by anemometers, Typhoon Muifa is analyzed in detail to obtain the wind characteristics, including the mean wind speed and direction, turbulence intensity and gust factor, power spectral density and integral scale of turbulence, etc. The correlated mean wind speeds at the two heights show the reliability of recorded wind data as well as the variation of wind speed with height. Turbulence inten- sities and gust factors fluctuate in a similar way. The values of inte- gral scales are sensitive in different case. The measured power spec- tra are particularly compared with Kaimal spectrum, Teunissen spectrum, Harris spectrum, and Davenport spectrum. The results show that the measured spectra cannot fit the code-suggested spectra very well, which exhibits the demand of more accurate spectra. Conclusions obtained in this article can provide references for wind resistance desima of suoer-long-soan cable-staved brides.As a cable-stayed bridge with the longest main span, the Sutong Bridge faces the threat of typhoons every year. Based on field measured data measured at the top of the tower and at the mid-span by anemometers, Typhoon Muifa is analyzed in detail to obtain the wind characteristics, including the mean wind speed and direction, turbulence intensity and gust factor, power spectral density and integral scale of turbulence, etc. The correlated mean wind speeds at the two heights show the reliability of recorded wind data as well as the variation of wind speed with height. Turbulence inten- sities and gust factors fluctuate in a similar way. The values of inte- gral scales are sensitive in different case. The measured power spec- tra are particularly compared with Kaimal spectrum, Teunissen spectrum, Harris spectrum, and Davenport spectrum. The results show that the measured spectra cannot fit the code-suggested spectra very well, which exhibits the demand of more accurate spectra. Conclusions obtained in this article can provide references for wind resistance desima of suoer-long-soan cable-staved brides.

关 键 词：field measurement cable-stayed bridge TyphoonMuifa wind characteristics 

分 类 号：TU4[建筑科学—土工工程] U41[交通运输工程—道路与铁道工程]