- 摘 要
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(1 清華大學土木工程系,清華大學結構工程與振動教育部重點實驗室,北京 100084;2 中國電子工程設計院,北京 100840)
[摘要]以一個實際高層框架-多子筒核心筒混合結構為例,通過靜力彈塑性計算和彈塑性動力時程計算,分析了在地震作用下框架-核心筒結構體系的受力特點,討論了該結構體系的合理破壞模式,提出將控制概念引入結構設計中,有目的地引導作為主要抗側力體系的核心筒的屈服機制和破壞模式,同時對外框架進行合理的設計使其具有足夠的承載力和延性,可以使框架-核心筒結構具備多道抗震防線,提高其抗震性能。結果表明:經(jīng)過合理設計,框架-核心筒結構可以具備三道抗震防線:連梁、子筒(或墻肢)、框架,并且結構同時具有足夠的耗能能力,能形成合理的破壞模式,提高抗震性能。
[關鍵詞]框架-核心筒結構;破壞模式;抗震性能;抗震防線
Seismic performances and failure mode analysis of hybrid frame-core tube structures
Miao Zhiwei1, Ye Lieping1, Wu Yaohui2, Ma Qianli1, Lou Yu2, Lu Xinzheng1(1 Department of Civil Engineering, Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 China Electronics Engineering Design Institute, Beijing 100840, China)
Abstract:A practical frame-core tube hybrid structure is analyzed with Pushover method and dynamic time-history analysis respectively as an example.
The seismic behaviors are analyzed and the rational failure mode of frame-core tube structure system is discussed. And it is proposed that by controlling the yielding mechanism and failure mode of the core tube based on the idea of the capacity design method and making sure the outer frame has sufficient loading carrying capacity and ductility at the same time, the seismic performance of the frame-core tube structure will be improved and multiple seismic fortification lines can be established. The analytical results show that the reasonably designed frame-core tube structure can form effective dual seismic resistant system which has three seismic fortification lines: coupling beams, sub-tubes and outer frame. Besides, the structure system has adequate energy dissipation ability and can achieve the rational failure mode.
Keywords:Frame-core tube structure; failure mode; seismic performance; seismic fortification lines
*國家十一五科技支撐計劃(2006BAJ03A02)。
作者簡介:繆志偉,博士研究生,Email:miaozhiwei00@mails.tsing-hua.edu.cn。
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