论文部分内容阅读
对开洞高层建筑刚性模型进行了风洞测压试验。基于试验结果,分析了立面和洞口表面的风压分布规律,研究了洞口表面脉动风压的功率谱。结果表明:当洞口轴线方向与来流方向一致时,迎风面洞口附近区域的平均风压系数总体上比立面不开洞时减小,少数测点的平均风压系数增大,脉动风压系数变化较小;背风面平均风压系数总体上比立面不开洞时减小,但洞口附近局部平均风压系数增大可达40%,脉动风压系数的变化规律与平均风压系数类似;侧风面平均风压系数和脉动风压系数比立面不开洞时均有不同程度的减小;洞口内部为负风压,脉动风压的功率谱与一般高层建筑侧风面气流分离区域脉动风压的功率谱有明显差异。最后,给出了设置两个洞口时,立面极值风压系数的影响系数以及洞口表面极值风压系数的分布图。
Wind tunnel pressure test was carried out on the rigid model of high-rise building. Based on the test results, the distribution of wind pressure on the surface and the hole surface is analyzed, and the power spectrum of fluctuating wind pressure on the surface of the hole is studied. The results show that when the direction of the axis of the hole coincides with the direction of the incoming flow, the average wind pressure coefficient in the vicinity of the windward surface hole decreases as compared with that in the case of the unapertured hole. The average wind pressure coefficient of a few measuring points increases. The average wind pressure coefficient of the leeward surface decreases less than that of the unaffected surface, but the local average wind pressure coefficient increases up to 40% in the vicinity of the hole. The variation law of fluctuating wind pressure coefficient and the average wind pressure coefficient The average wind pressure coefficient and the fluctuating wind pressure coefficient of the crosswind surface are all reduced to some extent when compared with the case of the unaffected facade; the negative pressure and the pulsating wind pressure inside the hole are similar to those of the general high-rise building side wind flow The power spectrum of pulsatile wind pressure in the separation area is obviously different. Finally, the influence coefficient of the wind pressure coefficient of the extreme surface elevation and the distribution of the wind pressure coefficient of the extreme surface of the hole are given when the two holes are set up.