Study On Wind Load Characteristics Of The Compound Curved Long-span Roof Of Hangzhou Asian Games Roller Skating Stadium

Hangzhou East Bay Sports Park-Asian Games Roller Skating Stadium(referred to as Roller Skating Stadium)is a new stadium for the 2022 Hangzhou Asian Games.The roof system of the staduim uses a composite curved large-span roof structure.Its unique shape and flexible structure are typical wind-sensitive structures.This paper uses the wind tunnel test method to test the wind pressure time history of different parts of the roof surface.Through data analysis and wind vibration calculation,the wind load of the roof envelope structure and the wind vibration response characteristics of the main structure are studied.The specific content includes the following three aspects:(1)A wind tunnel test was carried out on the roof of the roller skating hall,the distribution law of average wind pressure and extreme wind pressure at 24 wind direction angles was studied,and the distribution law of extreme wind pressure at the most unfavorable wind direction angle was discussed;According to the number of negative control wind pressure measurement points,it was found that the number of negative wind pressure control measurement points of the roller skating hall is far more than the number of positive wind pressure control measurement points;The roof of the roller skating hall is partitioned,and the distribution law of the partition shape coefficient is analyzed.(2)Analyze the probability distribution characteristics of the wind pressure time history of the measurement points in different parts of the roof,and find that the roof wind pressure has obvious non-Gaussian characteristics;the concept of skewness and kurtosis is introduced,and a simple but more effective method used to determine Gaussian and non-Gaussian measuring points is proposed;using the single distribution model and the mixed distribution model to fit the non-Gaussian wind pressure probability distribution,the results show that the KP(Kernel Density-Pareto)mixed model fits best;For non-Gaussian measuring points,the extreme wind pressure is calculated using the Gumbel fitting method.The results show that,compared with the peak factor method,this method is not only accurate and effective,but also has a simple process and is convenient for engineering applications.It compares the full-probability iterative method and the softening time history.Gaussian peak factor simplification algorithm Two non-Gaussian peak factor algorithms found that the principle of the full-probability iteration method is simple,and the calculation accuracy and probability target control are better than the softened time history non-Gaussian peak factor simplification algorithm.(3)In the analysis of roof wind vibration response,the displacement wind vibration coefficient of each node of the structure is calculated,and the variation law of the displacement wind vibration coefficient with the wind direction angle is studied;the value of the peak factor in the displacement wind vibration coefficient is investigated It is found that the calculation result of the non-Gaussian peak factor using extreme wind pressure has a higher degree of safety than the empirical value.