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http://dx.doi.org/10.11112/jksmi.2011.15.2.153

Estimation of Design Wind Speed Compatible for Long-span Bridge in Western and Southern Sea  

Kim, Han Soo (성균관대학교 초고층.장대교량학과)
Lee, Hyun Ho (성균관대학교 초고층.장대교량학과)
Cho, Doo Young (성균관대학교 과학기술연구소)
Park, Sun Kyu (성균관대학교 건설환경시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.15, no.2, 2011 , pp. 153-160 More about this Journal
Abstract
Recently there are many long span cable supported bridges like Cable Stayed Bridge and Suspension Bridge already constructed or planned. Reconsidering of proper design wind load of long span bridge is required since the meteorological value based on the data only from 1960s to 1995 has been used when we estimate the wind load for designing long span bridges. In this paper, the research area was confined to western and southern coasts where many long span bridges have constructed. The method of moment and the least-squares method were used to estimate the expected wind speeds of 100 year's return period for girder bridges and for 200 year's return period for long span bridges based on the Gumbel's distribution. As the return-period wind speed on the land face was revised because of recent high speed velocity, the revised return-period wind speed is increased by 17%. Compatibility of return-period wind speed was also evaluated using RMS (Root Mean Square) error method. Aa a result of this paper, the least-squares method is more compatible than the method of moment in the case of western and southern coasts in Korea.
Keywords
Basic wind speed; Return period wind speed; Least-squares method; RMS error method;
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