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［摘要］鄂爾多斯國(guó)泰商務(wù)廣場(chǎng)由6棟高層和3座大底盤(pán)裙房組成，其中兩棟為地上57層的超限鋼-混凝土混合結(jié)構(gòu)，結(jié)構(gòu)高度接近240m。工程采用了底部帶斜撐轉(zhuǎn)換的型鋼混凝土外框筒-鋼筋混凝土核心筒的結(jié)構(gòu)體系，未設(shè)置結(jié)構(gòu)加強(qiáng)層。介紹了工程的特點(diǎn)和結(jié)構(gòu)體系的選擇，針對(duì)結(jié)構(gòu)的超限情況提出相關(guān)的抗震措施。采用SATWE和ETABS有限元分析與設(shè)計(jì)軟件進(jìn)行了小震和中震的彈性計(jì)算，采用ABAQUS軟件進(jìn)行了大震動(dòng)力彈塑性時(shí)程分析進(jìn)行驗(yàn)證。重點(diǎn)介紹了斜撐轉(zhuǎn)換結(jié)構(gòu)的設(shè)計(jì)思路和計(jì)算方法，此外，設(shè)計(jì)還對(duì)轉(zhuǎn)換斜撐節(jié)點(diǎn)進(jìn)行了細(xì)致的有限元分析。分析結(jié)果顯示，工程各項(xiàng)計(jì)算指標(biāo)比較理想，整體設(shè)計(jì)滿足規(guī)范要求。
［關(guān)鍵詞］超限高層；混合結(jié)構(gòu)；轉(zhuǎn)換斜撐；彈塑性時(shí)程分析
中圖分類(lèi)號(hào)：TU973.121文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)09-0069-06
Design of out-of-codes high-rise buildings of Guo Tai Commercial Plaza in Ordos
Huang Guohui, Wang Zhigang, Yang Lei, Wei Liqiang(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:The Guo Tai Commercial Plaza in Ordos is composed of six tower buildings and three podiums, and two of the tower buildings are 240 meters high on the ground with 57 stories. The steel-concrete mixed structure is adopted which is composed of steel reinforced concrete outer tube and reinforced concrete core. There is no strengthening stories and transfer braces set in the lower level of outer tube. The feature and the selection of structural system are introduced. The ultra-limit design instructions are proposed for these out-of-codes high-rise buildings. ETABS and SATWE were used to analyze the structure performance under two different grades of earthquake, and also checked the structure performance under high earthquake grade using ABAQUS. It emphasizes on design idea and calculation method of transfer brace. The joint of transfer brace was analyzed carefully by using finite element method. Analysis results show that the solutions are feasible, and the overall design meets code requirements.
Keywords:out-of-codes high-rise building; mixed structure; transfer brace; elastic-plastic time history analysis
作者簡(jiǎn)介：黃國(guó)輝，高級(jí)工程師，Email:huanggh2009@126.com。
參考文獻(xiàn)
［1］沈蒲生. 帶加強(qiáng)層與錯(cuò)層高層結(jié)構(gòu)設(shè)計(jì)與施工［M］.北京：機(jī)械工業(yè)出版社,2009.
［2］JGJ3—2002高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］.北京：中國(guó)建筑工業(yè)出版社,2002.
［3］GB50011—2001建筑抗震設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社,2008.