- 摘 要
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（山鼎設計股份有限公司， 成都 610021）
［摘要］中交國際中心結構總高度213-1m，為超B級框架-核心筒結構，其頂部塔冠為觀光平臺，高度42-8m，采用鋼框架支撐結構，并通過底部轉換桁架與下部鋼筋混凝土主體結構相連。由于上部結構形式與下部主體結構差異較大，鞭梢效應較明顯。采用反應譜分析法、時程分析法以及樓面譜法3種方法對塔冠地震作用放大系數進行估算，得到單獨分析塔冠時的地震力放大系數為2-0。此外采用MIDAS，3D3S兩種軟件對塔冠結構進行了彈性對比分析，并對重要節(jié)點進行了實體有限元分析，保證了結構在大震下的傳力安全，所采用的分析方法可為同類結構的設計提供參考。
［關鍵詞］框架-核心筒結構; 塔冠； 鞭梢效應； 節(jié)點有限元
中圖分類號：TU318-2文獻標識碼：A文章編號：1002-848X(2017)23-0016-06
Structural design of tower crown of CCCC International Center
Zhao Panyu, Liu Bin, Zeng Jinghao, Yang Cheng
(Cendes Design Co.， Ltd.， Chengdu 610021， China)
Abstract:The total structural height of CCCC International Center is 213-1m and it is a frame-corewall structure which exceeds B-level height requirement in code, and the top tower crown is used for sightseeing which is 42-8m high. The steel frame bracing structure is applied to the tower crown and it is connected to the lower reinforced concrete main structure by the bottom transfer truss. The upper structural form is largely different from lower main structure, so the whipping effect is obvious. The seismic action amplification coefficient was estimated by response spectrum analysis method, time-history analysis method and floor spectrum method, and the seismic force amplification coefficient was 2-0 when the crown tower was analyzed separately. In addition, MIDAS and 3D3S softwares were used to carry out elastic analysis on crown structure respectively, and nodal finite element analysis was applied to analyze some important nodes, the safety of force transmission under rare earthquake was ensured. The analytical method can be used to provide reference for similar structure design.
Keywords:frame-corewall structure; tower crown; whipping effect; nodal finite element
作者簡介：趙攀宇，本科，一級注冊結構工程師，注冊土木工程師（巖土），Email:panyu.zhao@cendes-arch.com。
