开洞高层建筑风荷载的试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (11) : 63-67.

论文

开洞高层建筑风荷载的试验研究

李永贵1,2, 李秋胜2,3, 戴益民1

作者信息 +

Experimental Investigation of Wind Loads on Tall buildings with Openings

LI Yong-gui1,2 LI Qiu-sheng2,3, DAI Yi-min1

Author information +

文章历史 +

摘要

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，研究了设置洞口对高层建筑风荷载的影响。结果表明：立面开洞后，基底风荷载减小；单设上洞口和单设下洞口对减小顺风向平均基底剪力的效果比较接近，但上部开洞对减小顺风向平均基底弯矩和横风向根方差基底弯矩更为有利；拟合得到了顺风向平均基底弯矩系数和横风向根方差基底弯矩系数的相对值随开洞率变化的计算公式。设置洞口后，层风力的分布规律与未开洞时有很大差异，在抗风设计时应引起重视。

Abstract

Wind pressure measurements of tall buildings with openings were carried out in a Boundary Layer Wind Tunnel. Based on the test results, the influence of the openings on the wind loads on the tall buildings was investigated. The results indicate that the openings can reduce the base wind loads on the buildings. The reduction of along-wind mean base shear for the case when the openings are on upper parts is very close to that when the openings are located on the lower parts. But the former case is more favorable for decreasing the along-wind mean base moment and the across-wind RMS base moment. Empirical formulas for calculating the relative value of the along-wind mean base moment coefficient and the across-wind RMS base moment coefficient are proposed. The distributions of wind force at each floor on the tall buildings with openings are quite different to those without opening, which deserves special attention in wind-resist design of tall buildings with openings.

导出引用

李永贵1,2, 李秋胜2,3, 戴益民1. 开洞高层建筑风荷载的试验研究[J]. 振动与冲击, 2015, 34(11): 63-67

LI Yong-gui1,2 LI Qiu-sheng2,3, DAI Yi-min1. Experimental Investigation of Wind Loads on Tall buildings with Openings[J]. Journal of Vibration and Shock, 2015, 34(11): 63-67

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