大高宽比巨型框架-核心筒结构的整体稳定性分析  

Overall stability analysis for the mega frame-core tube structure with high aspect ratio

作　　者：彭志桢[1] 吴小宾[1] 陈文明[1] 肖克艰[1] 冯中伟[1] 朱道清[1] PENG Zhizhen;WU Xiaobin;CHEN Wenming;XIAO Kejian;FENG Zhongwei;ZHU Daoqing(China Southwest Architectural Design and Research Institute Ltd.,Co.,Chengdu 610042,China)

机构地区：[1]中国建筑西南设计研究院有限公司,成都610042

出　　处：《建筑结构》2020年第21期26-30,18,共6页Building Structure

摘　　要：对一个高度为546m,高宽比为10的巨型框架-核心筒结构的整体稳定性进行了分析研究,推导了该结构修正后的刚重比。分析了各种因素如高宽比、楼层质量分布以及各构件(伸臂桁架、环形桁架、外框架梁、巨柱及核心筒、次框架、斜撑)等对巨型框架-核心筒结构的整体稳定性影响,并总结了这些因素的影响规律。结果表明,结构整体稳定性随着高宽比增大而降低,随着楼层质量分布系数减小而提高;外围设置巨型斜撑可有效提高结构整体稳定性。The overall stability for a mega frame-core tube structure with the height of 546 meters and aspect ratio of 10 was analyzed and researched.The revised rigidity-gravity ratio of the structure was derived.The influence of various factors such as aspect ratio,floor mass distribution,outrigger truss,belt truss,outer frame beam,mega-column,core tube,sub-frame,diagonal bracing on the stability of the mega frame-core tube structure were analyzed.The regular pattern of these factors were summarized.The results show that the overall stability of the structure decreases with the increase of the height width ratio,and increases with the decrease of the floor mass distribution coefficient;and the overall stability of the structure can be effectively improved by setting giant braces around the structure.

关 键 词：巨型框架结构 整体稳定性 刚重比 高宽比 屈曲分析 

分 类 号：TU318[建筑科学—结构工程]