Impact of Annual Maximum Wind Speed in Mixed Wind Climates on Wind Hazard for Mainland China

Abstract

The coastal region in mainland China is prone to typhoon winds. However, a systematic analysis of the annual maximum wind speed analysis for typhoon and nontyphoon winds (i.e., mixed wind climate) using the wind records has not been reported for the region. The wind hazard modeling and analysis for mainland China was carried out in the present study by using wind records from 839 meteorological stations and considering mixed wind climates. The identification of typhoon winds from wind records is based on historical typhoon tracks. Both the region of influence approach and the at-site approach were used to estimate the T-year return period value of the annual maximum wind speed, vT, according to the wind-producing mechanism. The estimated vT for typhoon and nontyphoon winds was used to identify regions where typhoon winds dominate the wind hazard. Wind maps for mainland China were developed by combining wind hazards determined from a typhoon wind hazard model and wind records from meteorological stations to estimate vT. A comparison of developed maps to that given in the Chinese structural design code is given.