核筒悬挂建筑结构体系的顺风向风致响应分析  

THE ANALYSIS OF ALONG-WIND-INDUCED RESPONSES OF CORE-TUBE SUSPENDED BUILDING STRUCTURE

作　　者：蔡文华[1,2] 张继文[1] 涂永明[1,3] 梁书亭[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096 [2]盐城工学院土木学院,盐城224003 [3]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《工程力学》2011年第6期103-109,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50808039);江苏省自然科学基金项目(BK2008148;BK2009138);教育部博士点基金新教师项目(20070286095);华南理工大学亚热带建筑科学国家重点实验室开放研究项目(2008KB24)

摘　　要：核筒悬挂建筑结构是一种新型的高层建筑结构体系,其风致响应的研究很少。模拟了B类地貌下的风速时程,并转化为作用在结构上的风荷载时程;利用有限元软件ANSYS建立了结构计算模型,进行了结构水平顺风向风振响应分析,并与悬挂非减振结构进行比较,给出了阻尼器参数优化结果。分析结果表明,在水平顺风向风荷载作用下,核筒悬挂减振结构与非减振结构相比顶部位移、加速度均有所下降。阻尼器刚度的合理选择,不仅可使核筒顶部的位移响应减小,还可有效地控制悬挂楼层层间相对位移;而阻尼器阻尼系数取一个较大值(如1×108N.s/m)就可达到较好的控制效果。核筒悬挂减振结构具有良好的应用前景,该文的研究工作为这种新型结构体系的实用抗风设计提供参考。The Core-tube suspended structure is a novel kind of high-rise structural systems,while its wind-induced responses have not been studied systematically.The wind speed time-history in B class landscape is simulated.And then the wind speed time-history is transformed into wind load time-history acting on the building structure.The calculation model of a vibration-absorption suspended building is built with the finite element method software ANSYS.Then the wind-induced responses are calculated,which are compared with those of ordinary suspended structures.Consequently,the optimized values of parameters for damper connections are discussed.The results show that the displacement and acceleration responses of the top core-tube of a vibration-absorption suspended building under an along-wind load are less than those of an ordinary suspended building.The appropriate damper stiffness can not only reduce the displacement of the top core-tube,but also control the inter-story displacements of suspended floors effectively.And that an improved dynamic control of responses of a suspending building can be achieved with a relatively large damping coefficient,for instance,1×108N？s/m.The core-tube suspended structures have a good application prospect,and the present work may provide a wind-resistant design reference for this kind of structures.

关 键 词：悬挂结构 风速模拟 风致响应 阻尼器 参数优化 

分 类 号：TU311.3[建筑科学—结构工程]