开洞超高层建筑的风致内压干扰效应

发布时间：2018-10-05 21:18

【摘要】：为研究超高层建筑风致内压的干扰效应,在不同干扰工况下对一典型开洞超高层建筑进行了内压风洞试验。分析了不同截面宽度、不同高度施扰建筑干扰下的平均与峰值内压干扰因子的分布规律,并通过功率谱分析,研究了有、无干扰建筑时脉动内压的能量分布。结果表明:有、无干扰下的超高层建筑风致内压近似服从高斯分布;串列布置时,随着施扰建筑与受扰建筑的截面宽度比的增大,内压干扰因子逐渐减小;在并列布置且侧面开洞时,平均与峰值内压均呈放大效应,且干扰因子随着宽度比的增大而随之增加,峰值内压干扰因子最大值为1.33,此时若并列间距较小时,旋涡脱落共振峰值消失,但Helmholtz共振峰值能量会被大幅提高;当串列布置且施扰建筑高度与开洞所在高度相近时,侧面开洞受扰建筑的峰值内压始终被放大,峰值内压干扰因子最大值为1.12。
[Abstract]:In order to study the interference effect of wind-induced internal pressure in super-high-rise building, the wind tunnel test was carried out on a typical open-hole super-high-rise building under different disturbance conditions. The distribution law of the interference factor of the average and peak internal pressure under the disturbance of different cross-section width and height is analyzed, and the energy distribution of the fluctuating internal pressure is studied with and without interference through power spectrum analysis. The results show that the wind-induced internal pressure of super-tall buildings without disturbance is approximately distributed from Gao Si, and the interference factor decreases gradually with the increase of cross-section width ratio between disturbed buildings and disturbed buildings. When the hole is arranged side by side, the average and peak internal pressure are magnified, and the interference factor increases with the increase of width ratio. The maximum value of the interference factor is 1.33, and if the parallel spacing is small, the maximum value of the interference factor is 1.33. The peak value of vortex shedding resonance disappears, but the peak energy of Helmholtz resonance will be greatly increased. When the height of the disturbed building is similar to the height of the hole, the peak internal pressure of the disturbed building is always amplified. The maximum interference factor of peak internal pressure is 1.12.
【作者单位】：华南理工大学亚热带建筑科学国家重点实验室;重庆交通大学山区桥梁与隧道工程国家重点实验室培育基地;
【基金】：国家自然科学基金项目(51408227) 中央高校基本科研业务费专项(2015ZM001)
【分类号】：TU973.213

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