In order to effectively evaluate the wind resistance performance of the roof system of the airport terminal buildings and reasonably predict the structural wind damage of structures,a wind tunnel test method considering multiple performance levels of roof system of airport terminal was proposed in this study.In order to analyze the wind-induced response of the airport terminal,the distribution characteristics of wind load on the roof surface were analyzed by wind tunnel test,and the wind load of the corresponding wind direction angle was simulated.On this basis,according to the failure characteristics and structural characteristics of the roof truss and cladding system of the airport terminal,the triple performance level of the airport roof cladding structure and the roof truss structure were defined and quantified by the stress ratio of the roof structure and the relative displacement of the large rib edge nodes of the roof panel respectively.Then,the probabilistic wind disaster demand model and the wind disaster vulnerability function of the airport terminal building were constructed,and the wind disaster vulnerability analysis of the roof truss and cladding system of the airport terminal building was carried out by combining the Latin hypercube sampling method.The results show that the surface wind pressure of each area on the roof surface has an extreme value in the windward and leeward directions,and the maximum value appears in the windward direction.The probabilistic wind disaster demand model can accurately reflect the structural damage characteristics.According to the vulnerability curve,it can be used to obtain the minimum probability wind speed that the structural wind disaster demand reaches each performance level,which is 10,17,25m/s and 42,45,53m/s for the roof structure and the roof truss structure,respectively.This method can also be used to predict the wind disaster damage degree of the roof truss and cladding system of the airport terminal under a given wind speed,which is conducive to taking reasonable repair measures in time after the wind disaster.
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