Wind Load Effects Of High-rise Building Claddings And Balcony Photovoltaic Panels Based On Wind Tunnel Tests

Multiple wind disaster reports have shown that high-rise building claddings and components are more likely to be damaged under strong winds than main wind-force resisting system,so the wind-resistant design for high-rise building claddings and components is particularly important.Photovoltaic panels installed on the balconies of high-rise apartments,which also belong to claddings and components.Reasonable design wind load is a prerequisite for ensuring the wind resistance of these claddings and components,which depends on the extreme wind load on the structure surface with a certain exceeding probability.A common method for obtaining extreme wind loads is wind tunnel testing method.In this paper,a series of rigid model pressure wind tunnel tests for high-rise building and solar panels mounted on balcony of high-rise apartment are conducted.The distribution law of surface wind pressure,the probability statistical model of the extreme wind pressure,the area reduction of extreme wind pressure,and the wind direction factor of extreme wind pressure are specially studied.This dissertation mainly about following below:(1)Calibration and quantification the modeling uncertainty for high-rise building wind tunnel tests.A series of rigid model wind tunnel pressure tests for CAARC building with a scale ratio of 1: 400 are conducted.Based on the results of multiple independent and repeated sampling,we analysis the effects of reference pressure location on the test results in the test.The influence of the number of samples on the mean and extreme wind pressure coefficients is studied.Based on comparing and analyzing the mean wind pressure coefficient with that of international research institutions,it is concluded that the measured data is reliable.Wind tunnel tests modelling uncertainties are proposed for structural wind load design and structural reliability analysis.(2)Probability characteristics,area,and wind direction reduction of the surface wind pressure coefficient of high-rise buildings.The distribution law of extreme wind pressure coefficients of the CAARC building is studied.The probability distribution model of the extreme wind pressure coefficient is proposed.Based on the probability distribution model of extreme values on each fa?ade of the envelope structure,the design extreme wind pressure coefficients were proposed and compared with the code.The area reduction factors of different subordinate areas on each elevation of the model are analyzed,and the wind directionality effects of extreme wind pressure are studied,and the wind directionality factor for design is proposed.(3)Research on wind load characteristics and wind direction reduction effect of photovoltaic panels mounted on balconies of high-rise apartment.In this paper,wind tunnel pressure tests for the photovoltaic panels mounted on balconies of high-rise apartment with a scale ratio of 1:80 are conducted.Based on the test results of balcony photovoltaic panels,the distribution laws of mean wind pressure coefficients and extreme wind pressure coefficients of balcony photovoltaic panels were studied.The effects of installation height,location,wind direction,and panel inclination angle on wind loads were specially analyzed.Probabilistic distribution fitting was performed for extreme wind pressure coefficients of panels,and the best probability distribution model was proposed.Based on the fitted extreme distribution,the effects of the balcony photovoltaic panels’ installation parameter on the extreme wind pressure coefficients were analyzed and the design values were proposed.The wind directionality effects on extreme wind loads are studied.