多个主开洞的低矮建筑风压特性研究

Study on Wind Pressure Characteristics of Low-rise Buildings with Multiple Dominant Openings

研究多个主开洞的低矮建筑风压特性对于其抗风意义重大,但目前此类研究有限。依托CFD数值模拟计算平台,研究单面多个主开洞和多面多个主开洞的低矮建筑的风压分布特性。研究典型低矮建筑在单面多主开洞和多面多主开洞时,不同风速和风向角下的表面平均风压变化规律。分析得到多个开洞建筑的洞口位置、洞口数量和分布对平均风压系数的影响规律,发现单面多个主开洞和多面多个主开洞的低矮建筑的风压分布特性。对于多面多个主开洞建筑,发现并提出"通口效应"的存在。研究成果可为多个主开洞低矮房屋的抗风设计提供参考。

Wind pressure characteristics of low-rise buildings with multiple dominant openings is significant issues for wind-resisting design of low-rise buildings. However, the current studies on the issue are rather limited. Thus, based on CFD numerical simulation platform, wind pressure characteristics of low-rise buildings with multiple dominant openings on a single wall and multiple walls are studied here. Variation of mean wind pressure coefficients for multi-opening on two walls on a single wall and multiple walls at various wind angles are simulated. Through the anal- ysis of the simulation results, wind pressure characteristics of low-rise buildings with multiple dominant openings are found. The effects of multiple opening locations, numbers and distribu- tion on mean wind pressure coefficients are analyzed. For buildings with multiple dominant open- ings on multiple walls, ＂consistency effects＂ is firstly found and proposed. The research provides helpful results for the wind-resisting design of low-rise buildings with multiple dominant openlngs.