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Effects of corner modifications on wind loads and local pressures on walls of tall buildings

Building Simulation 2021年第4期14卷 1109-1126页

作者： K.T.Tse Gang Hu Jie Song Hyo Seon Park Bubryur Kim Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen518055China Engineering Research Center of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province School of Civil EngineeringWuhan UniversityWuhan430072China Department of Architectural Engineering Yonsei UniversitySeoul120-749R.O.Korea Department of Architectural Engineering Kyungil UniversityGyeongbukR.O.Korea

In this study, the aerodynamic characteristics of tall buildings with corner modifications (e.g., local wind force coefficients, mean pressure distributions, normalized power spectrum density, and extreme local pressure) were examined. wind tunnel experiments were conducted to measure the wind pressures on building models with different heights and recessed corners of different ratios. At a wind direction of a = 0° (i.e., wind blowing on the front of a building), corner modifications effectively reduced wind forces in all cases. Specifically, small corner modification ratios reduced wind forces more effectively than their larger counterparts. However, corner modifications resulted in extreme local pressure on building surfaces. In addition, for small corner modification ratios, the probability of extreme local pressure occurring at a = 0° was high. This probability was also high for large corner modification ratios at a = 15° (i.e., wind blowing slightly obliquely on the front of a building) because wind blowing obliquely creates substantial vortex shedding on one side surface and extreme negative pressure over one building side surface. Results of computational fluid dynamic modeling were adopted to determine details of the aerodynamic characteristics of tall buildings with corner modifications.

关键词： tall building aerodynamic modification local pressure extreme local wind loads proper orthogonal decomposition computational fluid dynamics

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