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(華東建筑設(shè)計研究院有限公司, 上海 200002)
摘要: 武漢綠地中心主塔樓結(jié)構(gòu)高度 475m,采用了 12 根巨柱+核心筒+9 道環(huán)帶桁架+3 道伸臂桁架+角部巨柱間支撐的抗側(cè)力體系. 環(huán)帶桁架的弦桿在平面上緊貼弧形的建筑邊界布置,在立面上隨建筑的形體也有一定角度的傾斜;同時,相鄰設(shè)備層之間的樓層次結(jié)構(gòu)重力柱也支承于環(huán)帶桁架上,使其成為中國目前 400m 以上級超高層建筑中首個兼作次結(jié)構(gòu)轉(zhuǎn)換桁架的空間異形環(huán)帶桁架結(jié)構(gòu). 通過分別建立 ETABS 桿系模型與 ANSYS 整體板殼有限元模型,研究了重力柱作用下空間異形環(huán)帶桁架在豎向荷載下的受力特點以及相應(yīng)的結(jié)構(gòu)設(shè)計對策;基于空間向量理論并結(jié)合建筑需求,研究并建立了空間異形環(huán)帶桁架的定位設(shè)計方法;針對重力柱與環(huán)帶桁架連接關(guān)鍵節(jié)點,開展了節(jié)點構(gòu)造設(shè)計,并進行了節(jié)點有限元分析;采用拆除構(gòu)件法對環(huán)桁架進行了抗連續(xù)倒塌分析,以確保結(jié)構(gòu)有合理的冗余度. 目前項目主體結(jié)構(gòu)已經(jīng)封頂,證明了上述分析、研究及設(shè)計對策保障了異形環(huán)帶桁架及整個結(jié)構(gòu)的安全性.
關(guān)鍵詞: 超高層結(jié)構(gòu); 異形環(huán)帶桁架; 定位設(shè)計; 節(jié)點設(shè)計; 抗連續(xù)倒塌分析
中圖分類號:TU973+.1 文獻標志碼:A 文章編號:1002?848X(2022)10?0061?06
DOI:10. 19701 / j.jzjg.HDY2202
Design research on irregular belt truss of Wuhan Greenland Center main tower
JI Jun, ZHOU Jianlong, HUANG Liang, LU Daoyuan
(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)
Abstract: The height of Wuhan Greenland Center main tower is 475m. Its lateral force resistance system is 12 megacolumns + core tube + 9 belt trusses + 3 outriggers + braces between mega columns in the corner. The truss chords of belttruss are arranged closely to the arc?shaped building boundary on the plane, and the facade is also inclined at a certainangle with the shape of the building; meanwhile, gravity columns of the substructure between adjacent equipment floors arealso supported by the belt truss, which makes it be the first irregular spatial belt truss structure as a secondary structureconversion truss in the current super high?rise buildings above 400m in China. By establishing the ETABS rod system modeland the ANSYS integral plate and shell finite element model respectively, the force characteristics of the irregular spatialbelt truss under vertical load from the gravity columns and the corresponding structural design countermeasures wereresearched. Based on the space vector theory and combined with architectural requirements, the positioning design methodof irregular spatial belt truss was established. For the key the connection joint between gravity column and belt truss, thespecial joint structure design was carried out and the finite element analysis of the joint was also carried out. Preventingprogressive collapse analysis of the belt truss was performed carried out by using the method of dismantling components toensure reasonable redundancy in the structure. At present, the main structure of the project has been capped, which provesthat the above analysis, research and design countermeasures ensure the safety of the irregular belt truss and the wholestructure.
Keywords:super high?rise structure; irregular belt truss; force analysis; positioning design; joint deign; preventingprogressive collapse analysis
∗“上 海 超 高 層 建 筑 設(shè) 計 工 程 技 術(shù) 研 究 中 心” 建 設(shè) 項 目 ( 14DZ2252800 ), 上 海 市 青 年 科 技 啟 明 星 計 劃 資 助 項 目(19QB1400600),上海市社會發(fā)展科技攻關(guān)項目(21DZ1204603).
第一作者:季俊,博士,高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事超高層及復(fù)雜結(jié)構(gòu)設(shè)計研究,Email: jj14490@ ecadi.com.
[引用本文] 季俊,周建龍,黃良,等. 武漢綠地中心主塔樓異形環(huán)帶桁架設(shè)計研究[ J]. 建筑結(jié)構(gòu),2022,52(10):61?66,20. JI Jun,ZHOU Jianlong,HUANG Liang,et al. Design research on irregular belt truss of Wuhan Greenland Centermain tower[J]. Building Structure,2022,52(10):61?66,20.
