某科技园双塔楼非定常绕流大涡模拟  

Large eddy simulation of unsteady flow around twin tower buildings of a science and technology park

作　　者：郑德乾 黄轩 潘钧俊 孔晴晴 李亮[1] 唐意 ZHENG Deqian;HUANG Xuan;PAN Junjun;KONG Qingqing;LI Liang;TANG Yi(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China;China Construction Eighth Bureau General Contracting Construction Co.,Ltd.,Shanghai 201107,China;China Academy of Building Research Co.,Ltd.,Beijing 100013,China)

机构地区：[1]河南工业大学土木工程学院,郑州450001 [2]中国建筑第八工程局有限公司,上海200135 [3]中建八局总承包建设有限公司,上海201107 [4]中国建筑科学研究院有限公司,北京100013

出　　处：《建筑结构》2025年第5期101-106,132,共7页Building Structure

基　　金：国家自然科学基金项目(51408196)。

摘　　要：以某科技园双塔楼为对象,采用大涡模拟方法进行了紊流边界层风场内的非定常绕流数值模拟研究。通过单体高层建筑大涡模拟和试验结果的对比,验证了大涡模拟方法及参数设置的有效性,研究了来流指向建筑的0°风向角情况下,相邻建筑对塔楼结构表面平均和脉动风压分布的影响,结合结构周围的时均流场和瞬时涡结构,进行了双塔楼高层建筑风荷载相互干扰机理分析。结果表明:双塔楼建筑对风吸力的影响较大,下游建筑增大了上游建筑的风吸力,而上游建筑减弱了下游建筑的风吸力。当仅考虑单一塔楼时,其平均风速和脉动风速分布规律相似,但塔楼1的侧面分离区和尾流区相比下游塔楼2面积较大;当同时考虑双塔楼时,塔楼间的干扰效应使得尾流区风速场和涡相互作用增强,涡道更加明显;受到两塔楼狭管效应和遮挡效应影响,上游塔楼右侧面的风吸力增大,而下游塔楼侧面和背风面的风吸力明显减弱。Taking the twin tower buildings of a science and technology park as the object,the large eddy simulation method was used to numerically study the unsteady flow in the turbulent boundary layer wind field.The validity of the large eddy simulation method and parameter setting was verified by comparing the simulation results with the experimental results of a single high⁃rise building.The influence of adjacent buildings on the average and fluctuating wind pressure distribution on the surface of the tower structure was studied when the wind direction angle of the incoming flow is 0°to the building.Combined with the time⁃averaged flow field and the instantaneous vortex structure around the structure,the wind load interaction mechanism of the twin tower high⁃rise buildings was analyzed.The results show that the twin tower buildings has a great influence on the wind suction.The downstream building increases the wind suction of the upstream building,while the upstream building weakens the wind suction of the downstream building.When only a single tower is considered,the distribution of average wind speed and fluctuating wind speed is similar,but the side separation area and wake area of tower 1 are larger than those of downstream tower 2.When considering the twin tower buildings at the same time,the interference effect between the towers enhances the wind speed field and vortex interaction in the wake area,and the vortex channel is more obvious.Affected by the narrow tube effect and shielding effect of the twin tower buildings,the wind suction on the right side of the upstream tower increases,while the wind suction on the side and leeward side of the downstream tower decreases significantly.

关 键 词：塔楼 大涡模拟 风荷载 流场分析 干扰效应 

分 类 号：TU312.1[建筑科学—结构工程]