Engineering Design Criteria Study Under Strong Wind Influence

As the high speed of urbanization,growth of population and social development in recent years, loss of typhoon disaster has rapidly increased in China. It is necessary to do some research work on engineering design criteria in case of strong wind in order to reduce loss of wind disaster.22 years hydrological data of Jiulong River, the second river in Fujian province, are selected to calculate water level design criteria using single-factor fitting method and compound extreme value distribution model in case of typhoon disaster. Results from calculation above are evaluated. P-G distribution is suggested as it is the best one among single-factor fitting methods with relatively small error and stable fitting result, while Pearson-â…¢fitting method is the worst one.Compared with single-factor fitting method, result of compound extreme value distribution model, considering more influencing factors, is more stable. Three-dimensional compound extreme value distribution model is the suggested in this case.A data set of 26 years wind velocity is selected to compare different probability models for extreme wind velocity prediction according to domestic standard. The Possion-Gumbel extreme value distribution model is suggested with relatively small error and better stability comparing with the result of traditional single-factor fitting model and its advantage in sampling.A new method for extreme wind velocity prediction considering wind direction is suggested. Different methods for predict extreme wind velocity along one direction are compared, including methods from criterion domestic and abroad.