Prediction of extreme wind speed for Runyang Suspension Bridge spot based on maximum entropy theory

Based on the maximum entropy reliability theory, the method of extreme wind velocity prediction for Runyang Suspension Bridge spot is presented to provide the practical wind load model for the wind-induced structural safety evaluation. Based on the short-time measurement the wind direction frequency of daily largest wind velocity is calculated to reflect the wind climate characteristics of the bridge site and the statistical curved surface of joint probability density function is also presented. The maximum entropy theory is further used to construct the joint probability model considering the joint action of wind speed and direction, and the extreme wind speed during the return periods of 50 and 100 years are further predicted. The analysis results show that the proposed joint probability model can describe the normal climate mode of Runyang Suspension Bridge spot. And the prediction wind velocity is less than the design velocity, which means that a large safety degree is contained in the anti-wind design of the bridge.