摘要
通过刚性模型同步测压风洞试验,研究周围建筑对Y形建筑风荷载和风效应的干扰影响,分析了全风向峰值正压系数、峰值负压系数、不同风向角下结构顶部加速度及其干扰因子等参数的变化规律。结果表明:干扰效应对全风向最大峰值负压系数影响程度要大于全风向最大峰值正压系数;干扰效应整体上会减少Y形截面超高层建筑全风向最大峰值正压值,增大全风向最大峰值负压绝对值,不利于工程设计,在实际工程时应引起重视;结构顶部最大峰值加速度受干扰效应影响会有所增加,最大峰值加速度为5.28 cm/s2,满足《高层建筑混凝土结构技术规程:JGJ 3—2010》对结构顶点最大加速度的限值要求。
The interference effect of surrounding buildings on the wind load and the wind-induced response for super high-rise buildings with Y-section were investigated by a series of synchronous pressure measurements.The variation of parameters such as peak positive pressure coefficient,peak negative pressure coefficient,acceleration at the top of the building with different wind direction angles,and the corresponding interference factors in all wind directions are obtained.The results show that the influence of the interference effect on the maximum peak negative pressure coefficient is greater than that of the maximum peak positive pressure coefficient;the interference effect will reduce the maximum peak positive pressure of the Y-section super high-rise building,while increase the minimum peak negative pressure,which is not conducive to engineering design,and it should be paid attention to in practical work;the maximum peak acceleration at the building top will increase due to the interference effect.The maximum peak acceleration value is 5.28 cm/s2,which meets the requirements of the specification.
作者
洪海波
余先锋
HONG Haibo;YU Xianfeng(China-Singapore Guangzhou Knowledge City Investment and Development Co.,Ltd.Guangzhou 510555,China;School of Civil Engineering and Transportation,South China University of Technology Guangzhou 510641,China)
出处
《广东土木与建筑》
2023年第4期56-59,64,共5页
Guangdong Architecture Civil Engineering
关键词
超高层建筑
Y形截面
干扰效应
风洞试验
super tall building
Y-shape section
interference effect
wind tunnel test
