Abstract

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Title:: Wind Tunnel Test and Numerical Analysis on Wind Load Characteristic of Plan T-shaped Low-rise Buildings

Author(s):: NIE Shao-feng; ZHOU Xu-hong; TAO Ying; ZHOU Tian-hua; School of Civil Engineering， Chang’an University

Keywords:: low-rise building; wind tunnel test; computational fluid dynamics; wind pressure coefficient; shape coefficien

Abstract:: Wind tunnel test on wind load characteristic of complex plan T-shaped low-rise gable roof buildings was presented. The change laws of wind pressure coefficient of roof and shape coefficient of each face were obtained. The computational fluid dynamics software FLUENT was employed to establish the numerical wind tunnel model, and the numerical simulation results agreed well with that of wind tunnel test. Then the detailed parametric analysis was performed for wind pressure coefficient and shape coefficient of roof. The parameters included wind attack angle, roof pitch, eave height, building geometry dimension and roof shape. The results show that roof pitch and wind attack angle have significantly effects on wind pressure coefficient of roof. Under the effect of different wind attack angles, high negative pressure will be formed on eave and ridge of windward roof. The distribution of wind pressure coefficient of roof in the leeward area is uniform. When the roof pitch is 30°, high negative pressure will be more easily formed in the leeward area of hip roof, so that the local area is easier to be destroyed.