巨型成對單斜支撐鋼結構體系設計研究
干鋼1，沈金1，童根樹1,2
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干鋼1，沈金1，童根樹1,2(1 浙江大學建筑設計研究院， 杭州 310028; 2 浙江大學建筑工程學院， 杭州 310058)［摘要］介紹了一幢采用巨型單斜支撐的超高層鋼結構的結構體系及其特點。兩片單斜支撐之間設有一跨和三跨無支撐跨。分析結果表明，成對的單斜支撐能夠承受豎向重力荷載，巨型單斜支撐節(jié)點處的樓層梁內(nèi)有較大的壓力和拉力。在水平力作用下，無支撐跨起著類似于彎曲型耗能連梁的作用，是這種結構體系具有優(yōu)越的抗震性能的保證。另外，還介紹了該結構的設計要點。［關鍵詞］巨型單斜支撐； 鋼結構； 高層建筑； 抗震設計中圖分類號：TU973.1+3 文獻標識碼：A 文章編號：1002-848X(2013)15-0015-04Study on design of binate diagonal mega-bracing system for a high-rise steel buildingGan gang1, Shen Jin1, Tong Genshu1,2(1 Architecture Design and Research Institute of Zhejiang University, Hangzhou 310028, China; 2 Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China)Abstract: The structural system and its characteristics of a high-rise steel building are introduced. The building adopted a binate diagonal mega-bracing system in which two pieces of vertical trusses are in one vertical plane, between them there are one or three spans in which no bracing members are used. Analysis results revealed that this system may carry gravitational loads, and the beams at the bracing joints carry large axial forces which need to be taken care of in the design. Under earthquake action, the unbraced spans take the role of energy-dissipating members as in the EBF(Ecentricity bracing frame) system with long link beams. The beams in the unbraced spans need to design with reference to the requirements on EBF. Other design details are also provided.Keywords: Mega-bracing; steel structure; high-rise building; seismic design作者簡介：干鋼，博士，研究員，一級注冊結構工程師，院總工，Email:gang@zuadr.com。參考文獻［1］GB 50011—2001 建筑抗震設計規(guī)范［S］. 北京；中國建筑工業(yè)出版社，2008.［2］建設部建質(zhì)［2010］109號，超限高層建筑工程抗震設防專項審查技術要點［S］. 2010.［3］JGJ 99—98 高層民用建筑鋼結構技術規(guī)程［S］. 北京；中國建筑工業(yè)出版社，1998.
