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

• 作者: K.T.Tse Gang Hu Jie Song Hyo Seon Park Bubryur Kim
• 来源期刊: 建筑模拟（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Indoor/Outdoor Airflow and Air Quality
• 页码范围: 1109-1126
• 页数: 18页
• 语种: 英文

摘要

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 ofα = 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 atα = 0° was high. This probability was also high for large corner modification ratios atα = 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.