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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。
In order to study the interference effect of wind-induced internal pressure in super-tall buildings, the internal pressure wind tunnel test was conducted on a typical open-hole high-rise building under different interference conditions. The distribution law of average and peak internal pressure disturbance factors under different building widths and building heights with different heights is analyzed. The power distribution of pulsating internal pressure during building with and without disturbance is studied by power spectrum analysis. The results show that the wind-induced internal pressure of superstructures with and without interference obeys Gaussian distribution approximately. In tandem arrangement, the internal pressure disturbance factor decreases with the increase of the cross-sectional width ratio of the disturbed building and the disturbed building. When arranged side-by-side with side holes, the average and peak internal pressures show an amplification effect, and the interference factor increases as the width ratio increases. The maximum value of the peak internal pressure disturbance factor is 1.33. Hour, the peak value of vortex shedding disappears, but the Helmholtz resonance peak energy will be greatly increased. When the serial arrangement and the height of the disturbing building are close to the height of the opening hole, the peak internal pressure of the disturbed building in the side opening hole is always amplified. The maximum internal pressure disturbance factor is 1.12.