地域典型强风作用下异型建筑风荷载分布研究  

Study of Wind Load Distribution in Special-shaped Buildings Under Typical Strong Wind

作　　者：王辉明[1] 王祥林 王诗怡 WANG Huiming;WANG Xianglin;WANG Shiyi(College of Civil Engineering and Architecture,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830046

出　　处：《河南科技大学学报（自然科学版）》2022年第1期57-63,M0005,M0006,共9页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51568062,11362022)。

摘　　要：为了更加了解异型建筑表面风荷载分布规律和提高建筑抗风能力,采用计算流体动力学(CFD)方法,结合乌鲁木齐地区风环境特征,以异型建筑新疆大剧院为例,根据英联邦航空咨询研究会(CAARC)高层建筑标准模型的风洞试验和数值模拟对比,选择出最符合流场真实情况的可实现(Realizable)k-ε湍流模型,研究了不同风向角下异型建筑表面的风荷载分布规律。研究结果表明:在采用Realizable k-ε湍流模型的数值模拟下,新疆大剧院周围流场符合钝体绕流现象;在45°、90°和135°风向角下,因内外壳截面变化造成了建筑壁面体型系数的复杂分布;根据规范要求提出了新疆大剧院分区风荷载体型系数的建议值,可为类似异型建筑的风荷载取值和抗风设计提供参考。To better understand the distribution law of wind load on the surface of the special-shaped building and improve the wind resistance ability of the building,this paper adopted the computational fluid dynamics(CFD)method,combined with the wind environment characteristics in Urumqi,and taked special-shaped building Xinjiang grand theater as an example.Based on wind tunnel tests and numerical simulations of the commonwealth aviation advisory research conference(CAARC)standard model for tall buildings,a realizable k-εturbulence model fitting the real situation of the flow field was selected.The distribution law of wind load on the surface of a special-shaped building under different wind direction angles was studied.The results show that the flow field around the Xinjiang grand theatre is accordant to the phenomenon of flow around a dull body.Under the wind direction angles of 45°,90°and 135°,the complex distribution of the shape coefficient of the building wall is caused by the cross-section variation of the internal and external shell.According to the requirements of the specification,the suggested values of the sectional wind load coefficient for Xinjiang grand theatre are proposed,which can provide a reference for the wind-load value and wind resistance design of similar special-shaped buildings.

关 键 词：异型建筑 数值模拟 风荷载分布 体型系数 

分 类 号：TU312.1[建筑科学—结构工程]