阵列式分布高层建筑群风致干扰效应研究  

Wind-induced interference effect of array distributed high-rise buildings

作　　者：严亚林 唐意 杨立国 Yan Yalin;Tang Yi;Yang Liguo(State Key Laboratory of Building Safety and Environment,Beijing 100013,China;China Academy of Building Research,Beijing 100013,China;CABR Technology Co.Ltd,Beijing 100013,China)

机构地区：[1]建筑安全与环境国家重点实验室,北京100013 [2]中国建筑科学研究院有限公司,北京100013 [3]建研科技股份有限公司,北京100013

出　　处：《建筑科学》2021年第11期48-54,共7页Building Science

基　　金：住房和城乡建设部课题(2021-K-028)。

摘　　要：基于实际超高层建筑群的风洞对比试验,研究了阵列式分布高层建筑群建筑主体结构轴向风荷载静力、动力干扰效应及围护结构干扰效应,并结合CFD计算结果及基底弯矩谱分析了干扰机理。研究表明:(1)阵列建筑群角部建筑平动方向平均风荷载不高于单体建筑,但平均扭矩会有较大幅度增加,且横风向振动可能加强;(2)临近角部的边缘建筑,由于前方来流加速,平均风荷载相对于单体建筑约增加20%;风速增加导致横风向功率谱谱峰向高频方向移动,对结构横风向均方根响应影响较大;(3)受遮挡效应影响,离角部相对较远的边缘建筑主体结构平均风荷载不超过单体建筑;(4)两侧建筑干扰引起边缘中部建筑前方来流风速增加,与单体建筑相比,边缘中部建筑的迎风面极值正压增加,侧面极值负压增加。Based on the wind tunnel comparative test of the actual super high-rise buildings, the static, dynamic and envelope interference effects of the main structure of the array high-rise buildings are studied, and the interference mechanism is analyzed by combining the CFD calculation results and the overturning moment spectrum. The results show that:(1) The average wind load in the translation direction of the corner building in the array is not higher than that of the isolated buildings, but the average torsion will increase considerably, and the cross-wind vibration may be strengthened.(2)For the edge buildings near the corner of the array, the average wind load increases by about 20% compared with the isolated building due to the increase of the forward inflow;the increase of wind speed causes the peak of the cross-wind power spectrum to move towards the high frequency direction, which has a great influence on the cross-wind RMS response of the structure.(3)Affected by the shelter effect, the average wind load of the main structure of the edge building which is relatively far from the corner building does not exceed that of the isolated building.(4)The disturbance of buildings on both sides leads to the increase of wind speed in front of buildings in the middle of the edge buildings. Compared with isolated building, the peak positive pressure on the windward side of buildings in the middle of the edge buildings increases, and the peak negative pressure on the side of buildings in the middle of the edge buildings increases.

关 键 词：风致响应 干扰效应 基底弯矩 横风向 干扰因子 

分 类 号：TU311.3[建筑科学—结构工程]