基于大涡模拟的超高层双塔建筑风荷载特性研究  

STUDY OF WIND LOAD CHARACTERISTICS OF TWIN-TOWER BUILDING BASED ON LARGE EDDY SIMULATION

作　　者：肖正直[1] 李彦琪 黄诚为 胡李俐[1,2] 孙毅[3] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]华西师范大学基建处,四川南充637009 [3]重庆科技学院建筑工程学院,重庆401331

出　　处：《工业建筑》2016年第10期72-78,82,共8页Industrial Construction

基　　金：国家自然科学基金项目(51308568);重庆市教委科学技术研究项目(KJ1401331);教育部中央高校基本科研业务费专项资金资助项目(CDJZR12200061;CDJZR12200017)

摘　　要：随着建筑技术和建筑材料的不断发展,出现了越来越多的超高层建筑,其中有些是双塔形式的建筑。风荷载是这类结构重要的控制荷载,双塔建筑之间风荷载的干扰作用复杂,GB 50009—2012《建筑结构荷载规范》没有作出明确的规定。要对建筑进行精细化分析,必须详细了解其风荷载特性。基于风洞试验和数值风洞模拟,对双塔建筑的风荷载特性进行研究。利用谐波合成法得到数值风洞的入口脉动风速,基于大涡模拟得到双塔建筑的阻力系数、升力系数、风荷载功率谱及双塔之间的干扰作用,并将计算结果与刚性模型测压试验的结果进行对比,各工况结果吻合良好。In recent years,with the continuous development of construction technology and building materials,there were more and more high-rise buildings,some of which were in the form of twin tower building. Wind load was the important control load of such sort of structure. The effect of wind load between the twin tower buildings was complicated,and Load Code for the Design of Building Structures（ GB 50009—2012） had no explicit provision yet.To make a meticulous analysis of the buildings,it is necessary to understand the characteristics of wind load in detail.Based on wind tunnel test and numerical simulation,it was studied the characteristics of wind load of the twin tower buildings. The harmonic synthesis method was used to obtain pulsating inlet wind speed of numerical wind tunnel;interference effects between twin towers,the resistance coefficient,the lift coefficient and wind load spectrum were got based on large eddy simulation. And the calculation results and the rigidity model manometric test results were compared,the results of all cases were in good agreement.

关 键 词：双塔建筑 大涡模拟 风洞试验 阻力系数 风荷载功率谱 

分 类 号：TU973.213[建筑科学—结构工程]