勒泰中心折板鋼桁架屋蓋結(jié)構(gòu)設(shè)計
張偉育1，王洪軍1，黃聿瑩1，趙 偉2
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張偉育1，王洪軍1，黃聿瑩1，趙 偉2（1 華東建筑設(shè)計研究院有限公司，上海 200002；2 石家莊勒泰房地產(chǎn)開發(fā)有限公司，石家莊 050011）［摘要］石家莊勒泰中心空中廣場屋蓋采用不規(guī)則鋼結(jié)構(gòu)折板桁架，結(jié)構(gòu)承重柱位于裙房層5~7屋頂，復(fù)雜的結(jié)構(gòu)形狀和支承條件造成結(jié)構(gòu)受力很不均勻。介紹了結(jié)構(gòu)體系選型；對比了帶下部混凝土結(jié)構(gòu)和不帶下部混凝土結(jié)構(gòu)兩個模型對地震作用效應(yīng)計算的差別，說明了整體分析的必要性；風(fēng)致效應(yīng)直接讀取風(fēng)洞試驗計算結(jié)果進行應(yīng)力和位移驗算，對應(yīng)3種雪荷載分別采用三種性能控制水準；對結(jié)構(gòu)整體穩(wěn)定極限承載力和關(guān)鍵節(jié)點進行了有限元分析，確保結(jié)構(gòu)安全。［關(guān)鍵詞］折板結(jié)構(gòu)；整體穩(wěn)定；性能設(shè)計中圖分類號：TU398.7文獻標識碼：A文章編號：1002-848X(2012)05-0145-05Design on folded plate truss of roof structure of Lertai CenterZhang Weiyu1, Wang Hongjun1, Huang Yuying1, Zhao Wei2（1 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China；2 Shijiazhuang Lertai Real Estate Development Co., Ltd., Shijiazhuang 050011, China）Abstract: The roof structure of Lertai Center Sky Plaza adopts irregular steel folded plate trusses and the bearing columns sit on the fifth, sixth and seventh floors of the podium. Behaviours of the structure are unusual for the complex shape and supports. The selected structural system was introduced. The computational differences in the effects of earthquakes on the two models with and without the lower concrete structure were compared to illustrate the necessity of an overall analysis. The stress and displacement under the wind load were calculated by the results of the wind tunnel test. Three performance-based design standards were used under three snow load states. Overall stability limited resistance and key joints were analyzed by finite element software to ensure the safety of the structure.Keywords: folded structure; overall stability; performance-based design作者簡介：張偉育，高級工程師，Email：weiyu_zhang@ecadi.com。參考文獻［1］海諾·恩格爾.結(jié)構(gòu)體系與建筑造型［M.天津：天津大學(xué)出版社，2002.［2］石家莊勒泰中心空中廣場屋蓋結(jié)構(gòu)風(fēng)洞試驗研究報告［R］. 石家莊：石家莊鐵道學(xué)院，2011.［3］JGJ 7—2010 空間網(wǎng)格結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京：中國建筑工業(yè)出版社，2010.
