摘要
为了探讨较大长宽比的超高层框-筒结构加强层数量的确定以及加强层构件的布置,并得到既满足结构需要,又能尽量降低加强层引起的结构竖向刚度和内力突变所带来的不利影响的加强层设置方案,以青岛海天中心T2塔楼作为研究对象,基于ETABS软件建立三维结构模型进行分析。在对比了按照传统原则设置的加强层方案和改进方案后,提出了基于该结构的一种较大长宽比超高层框筒结构加强层的设置原则:在刚度较小的方向上布置伸臂桁架和腰桁架,在刚度较大的方向上不布置伸臂桁架,只在两端跨内布置腰桁架,这样既能满足结构对侧移和层间位移角的需求,又能使层间位移角突变和内力突变降低,同时减小加强层处两个主轴方向的刚度差异,对结构最有利。
In order to explore the determination of the number of strengthened stories and the arrangement of strengthened story components for super high-rise frame-tube structures with large aspect ratios,and to obtain a strengthened story layout plan that can meet the structural needs while minimizing the adverse effects of vertical stiffness and internal force mutations caused by the strengthened story,the T2 tower of Qingdao Haitian Center is taken as the research object,and a three-dimensional structural model is established based on ETABS software for analysis.After comparing the traditional scheme of arranging strengthened stories with improved schemes,a setting principle of strengthened story of super high-rise frame-tube structure with large aspect ratio based on this structure is proposed.The outrigger trusses and waist trusses are arranged in the direction with low stiffness,while the outrigger trusses are not arranged in the direction with high stiffness,and waist trusses are only set within the end spans.This approach not only can meet the structural demands of lateral displacement and inter-story drift,but also can reduce the abrupt change of inter-story drift and internal force.At the same time,the stiffness difference between the two main axes at the strengthened story is reduced,which is most beneficial to the structure.
作者
杨俊芬
杨巽
郭凯源
杨想兵
YANG Junfen;YANG Xun;GUO Kaiyuan;YANG Xiangbing(College of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;China Construction Design International Co.,Ltd.,Shenzhen 518000,China)
出处
《建筑钢结构进展》
北大核心
2025年第4期100-108,117,共10页
Progress in Steel Building Structures
基金
国家自然科学基金(52378188)。
关键词
大长宽比
超高层结构
框架核心筒结构
加强层
伸臂桁架
腰桁架
内力突变
large aspect ratio
super high-rise structure
frame-core tube structure
strengthened story
outrigger truss
waist truss
sudden change of internal force
