某方形截面超高层建筑风效应风洞试验与荷载规范对比研究

Abstract

以钦州北部湾中心主塔楼为研究对象，利用刚性模型测压风洞试验详细研究了该方形截面超高层建筑表面的极值风压分布特性、塔楼主体的风荷载以及风致加速度响应，并将试验结果与荷载规范进行了对比。结果表明：极值负压为幕墙设计的控制风压，荷载规范对建筑立面中心区域的极小风压系数的取值偏于不安全，对拐角区域的取值偏于保守；塔楼主体的基底弯矩等效静力风荷载由平均风荷载控制；风致加速度响应表现为明显的横风向效应。本文所获结论可为类似项目提供参考。 Based on the wind tunnel tests of rigid model of the major tower of Beibu Gulf Center in Qinzhou, characteristics of the extreme wind pressures, overall wind loads acting on the square super high-rise building and wind-induced acceleration responses have been investigated in detail. The test results show that the extreme negative pressures are the controlled pressures for the curtain wall design; the suggested values in the Code are unsafe at the center of the building while conservative at the corner of the building. The equivalent static wind loads of the base moment are controlled by the mean wind loads. The wind induced accelerations present obvious across wind effects. The results obtained from this paper could be referred to similar projects.