超高層混合建筑結構豎向變形差計算分析
鄭七振，康偉，吳探，唐玉，王東
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(上海理工大學土木工程學系，上海 200093)［摘要］超高層建筑塔樓施工中存在的較大技術難點是結構豎向變形差的調整。以上海匯豐銀行大廈為背景，研究了在豎向重力荷載作用下，鋼-混凝土混合結構的外圍巨型柱與核心筒之間的豎向變形差。分析表明，整體結構模型與施工階段模型的分析結果存在著較大的差異，在實際運用中應采用考慮混凝土時變特性的施工階段模型；施工速率對結構豎向變形的影響不大，可以忽略不計；結構中剛度很大的桁架層對減小巨型柱與核心筒之間的豎向變形差作用顯著。最后根據仿真分析的結果，并考慮了施工中的標高補償之后，確定了符合實際施工情況的構件預拋高值。從而規(guī)避了施工質量風險，達到了設計預期要求。［關鍵詞］計算機仿真技術；超高層建筑；混合結構；變形差中圖分類號：TU398.7，TU973文獻標識碼：A文章編號：1002-848X(2011)08-0049-05Calculation and analysis on the different vertical deformation of super high\|rise hybrid building structuresZheng Qizhen, Kang Wei, Wu Tan, Tang Yu, Wang Dong(Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)Abstract:The different vertical deformation occurred in the construction of the super high-rise tower building is one of the most important technical problems. On the background of HSBC building in Shanghai, the different vertical deformation between peripheral mega-columns and the core-wall of the steel-concrete hybrid structure subjected to gravity loads was analyzed. The results show that the analysis results of the construction stage model are different from that of the monolithic structure model. As considering the concrete time-dependent property, the construction stage model is more suitable to be used in the practical application. The construction velocity, which has little influence on the vertical deformation, could be ignored. While the stiffness of truss stories is huge, and it has great effect on reducing the different vertical deformation of peripheral mega-column and core-wall. According to the results of the simulation analysis and considering the compensation of construction elevation, the value of member flip-height is finally determined. Thus the risk of the construction quality could be avoided and the expected design requirements are achieved.Keywords:computer simulation technology; super high-rise building; hybrid structure; different vertical deformation作者簡介：鄭七振，教授，碩士，Email：zhengqz1@163.com。參考文獻［1］郭彥林,劉學武,張慶林,等.復雜鋼結構施工力學問題的研究與應用［J］.施工技術，2006，35(12): 1-6.［2］周緒紅，黃湘湘，王毅紅，等. 鋼框架\|鋼筋混凝土核心筒體系豎向變形差異的計算［J］.建筑結構學報, 2005, 26(2): 66-73.［3］PARK H S. Optimal compensation of differential column shortening in high\|rise building［J］. The Structural Design of Tall and Special Buildings,2003(12): 49-66.［４］Council on Tall Buildings and Urban Habitat. Cast\|in\|place concrete in tall building design and construction［M］. New York: McGrow-Hill Inc,1992.［5］吳探，鄭七振，彭斌，等. 整體提升施工控制技術在紹興世貿中心的應用［J］.施工技術，2008，37(2)：57-59.［6］沈蒲生，方輝，夏心紅. 混凝土收縮徐變對高層混合結構的影響及對策［J］.湖南大學報：自然科學版, 2008, 35(1): 1-5.［7］Comite Euro\|International du Beton. CEB-FIP model code ［M］. London: Tomas Telford, 1993.［8］過鎮(zhèn)海.混凝土的強度和本構關系［M］.北京:中國建筑工業(yè)出版社，2004.［9］羅文斌，張保印.超高層建筑S+RC混合結構豎向變形差的工程對策［J］.建筑結構學報, 2000, 21(6): 68-73.［10］周緒紅，黃湘湘，王毅紅，等. 鋼框架\|鋼筋混凝土核心筒體系豎向變形差異補償對結構性能的影響［J］.土木工程學報, 2006, 39(4): 15-19.
