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(華東建筑設(shè)計(jì)研究院有限公司, 上海 200002)
摘要: 武漢綠地中心主塔樓建筑高度 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,其中巨柱外框結(jié)構(gòu)是塔樓抗側(cè)力體系及重力體系的重要組成部分. 分析了塔樓體型在低區(qū)向外傾斜對(duì)巨柱設(shè)計(jì)的不利影響,給出了結(jié)構(gòu)加強(qiáng)對(duì)策;開展了巨柱屈曲分析,得到了巨柱的計(jì)算長度,基于巨柱性能目標(biāo)及計(jì)算長度進(jìn)行了巨柱構(gòu)件驗(yàn)算,驗(yàn)算結(jié)果可以滿足規(guī)范要求;計(jì)算了巨柱考慮高強(qiáng)混凝土爆裂的耐火極限時(shí)間,耐火極限在 7h 以上;論述了綜合考慮建筑利用率和結(jié)構(gòu)抗側(cè)效率最大化的巨柱定位設(shè)計(jì)方法;介紹了巨柱關(guān)鍵節(jié)點(diǎn)設(shè)計(jì)構(gòu)造,ANSYS 分析結(jié)果表明,關(guān)鍵節(jié)點(diǎn)的強(qiáng)度滿足要求;對(duì)罕遇地震作用下巨柱損傷進(jìn)行了動(dòng)力彈塑性時(shí)程分析,研究表明型鋼混凝土巨柱滿足 IO(立即入住)的性能目標(biāo). 目前項(xiàng)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(jì)對(duì)策保障了外框巨柱及整個(gè)結(jié)構(gòu)的安全性.
關(guān)鍵詞: 超高層結(jié)構(gòu); 外框巨柱; 定位設(shè)計(jì); 耐火極限; 節(jié)點(diǎn)構(gòu)造
中圖分類號(hào):TU973+.1 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)10?0056?05
DOI:10. 19701 / j.jzjg.HDY2249
Design research on outer mega column 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 mage columns in the corner, among them, the outerframe structure of the mega column is an important part of the lateral force resistance system and the gravity system of thetower. Adverse effect of outward inclination of the tower’ s shape in the low zone on the design of mega columns wasanalyzed, and then the structural strengthening countermeasures was given. Buckling analysis of the mega column wascarried out, calculated length of the mega columns was got. Based on performance objective and calculated length of megacolumns, checking calculation of mega columns was carried. The checking results meet the requirements of thespecification. Fire resistance limit time of the mega column considering the burst of high?strength concrete was calculated,resistance limit time is above 7h. The positioning design method of the mega column that comprehensively considers thebuilding utilization rate and the maximization of the lateral resistance efficiency of the structure was discussed. Design andconstruction of key joints of the mega column were introduced, ANSYS analysis results show that the strength of key jointsmeet the requirements. Dynamic elastic?plastic time?history analysis of the damage of mega column under rare earthquakewas carried out, the research shows that the mega columns meet the IO ( immediate occupancy) performance target. Atpresent, the main structure of the project has been capped, which proves that the above analysis, research and designcountermeasures ensure the safety of outer mega column and whole structure.
Keywords:super high?rise structure; outer mega column; positioning design; fire resistance; joint construction
∗“上 海 超 高 層 建 筑 設(shè) 計(jì) 工 程 技 術(shù) 研 究 中 心” 建 設(shè) 項(xiàng) 目 ( 14DZ2252800 ), 上 海 市 青 年 科 技 啟 明 星 計(jì) 劃 資 助 項(xiàng) 目(19QB1400600),華建集團(tuán)科研項(xiàng)目(19?1 類?0142?結(jié)).
第一作者:季俊,博士,高級(jí)工程師,一級(jí)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(jì)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外框巨柱設(shè)計(jì)研究[ J]. Building Structure,2022,52(10):56?60. JI Jun,ZHOU Jianlong,HUANG Liang,et al. Design research on outer mega column of Wuhan GreenlandCenter main tower[J]. 建筑結(jié)構(gòu),2022,52(10):56?60.
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