巨型型钢混凝土框架-核心筒超高层结构抗震性能与破坏模式分析  

Seismic performance and damage patterns of super high-rise mega SRC frame-core wall structure

作　　者：陈麟[1] 杨航[1] 吴珊瑚[1] 周云[1] 

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《建筑结构》2014年第2期25-31,共7页Building Structure

基　　金：广东省自然科学基金团队项目(8351009101000001);广州市珠江科技新星专项(2011J2200023)

摘　　要：巨型型钢混凝土(SRC)框架-核心筒结构是由巨型型钢混凝土框架、钢筋混凝土核心筒和伸臂桁架组成的一种具有多道抗震防线的超高层结构体系。以某超高层建筑为工程背景,建立有限元分析模型,通过反应谱分析、动力弹塑性时程分析和静力弹塑性分析,研究这种结构体系在地震作用下的变形、基底剪力及屈服破坏机制。分析结果表明:结构下部变形较大,反映出结构下部破坏比上部严重和核心筒破坏比框架严重这两种破坏趋势;结构呈现"连梁→墙肢→框架"的屈服机制,符合多道抗震防线的概念设计;结构的加强层、裙塔楼交接处以及结构底部容易首先破坏,设计中应当注意这些薄弱环节。Mega steel reinforced concrete （SRC） frame-core wall structure is a type of structural system for super high-rise buildings, consisting of mega SRC frame, reinforced concrete （RC） core wall and outrigger trusses. Finite element analysis model was constructed according to a super high-rise building. Response spectrum analysis, time history analysis and Pushover analysis were carried out to study the deformation, base shear forces and yield failure mechanism of this type of structural system when subjected to earthquake. The results show that the maximum deformation occurred in lower story which indicate the lower part of the structure was destroyed more seriously and the core wall was destroyed more seriously than frame. The structure presented yield sequence as coupling wall-beam to coupling wall-column to frame, corresponding to the seismic concept design of multi-line. The weak parts of the structure such as strengthened story, bottom story and intersection members between podium building and main building, should be paid much attention to during the design.

关 键 词：巨型框架-核心筒结构 型钢混凝土 抗震性能 屈服机制 

分 类 号：TU398.7[建筑科学—结构工程]