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(1 華東建筑設(shè)計(jì)研究院有限公司  上海 200002； 2 同濟(jì)大學(xué)  上海 200092)
［提要］  上海鐵路南站是上海新建的重要交通樞紐，是第一座采用開(kāi)敞式候車(chē)空間、采用圓形平面布置的火車(chē)站。環(huán)向布置的內(nèi)、外兩圈柱子支撐起總跨度275m的大空間，并保證了中心150m直徑的候車(chē)區(qū)形成開(kāi)闊的無(wú)柱空間。整個(gè)鋼屋蓋結(jié)構(gòu)復(fù)雜，在設(shè)計(jì)中攻克了多道難關(guān)，針對(duì)其中鋼屋蓋整體穩(wěn)定研究及三水準(zhǔn)設(shè)防的抗震研究進(jìn)行介紹。鋼屋蓋整體穩(wěn)定包括兩個(gè)層次：屋蓋體系的幾何非線(xiàn)性分析與單根主梁的雙非線(xiàn)性分析?？拐鹧芯砍M(jìn)行多遇地震下的譜分析及時(shí)程分析外，還進(jìn)行了中震及罕遇地震下的時(shí)程分析。通過(guò)對(duì)不同地震作用提出不同設(shè)計(jì)要求的方法來(lái)實(shí)現(xiàn)三水準(zhǔn)設(shè)防的抗震思想。
［關(guān)鍵詞］  上海鐵路南站  鋼屋蓋  整體穩(wěn)定  抗震  時(shí)程分析
Aseismic Research and Globlal Stability of Roof Structure on Shanghai South Railway Station/Wang Dasui1,2,Zhou Jianlong1,Li Shi1,2,Shen Zuyan2,Luo Yongfeng2(1 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China; 2 College of Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract:Shanghai south railway station is a new important transportation center with an open waiting room and a circular layout. The inner and outer ring columns support a large space with a 275meter span total and a nocolumn area of 150meter diameter. The roof structure is very complex and many difficulties are solved in design. The global stability and aseismic analysis of the roof structure are introduced. The global stability analysis includes two parts: the whole roofs geometric nonlinear analysis and a single main beams geometric and material nonlinear analysis. The responses of the structure under frequent, moderate and rare earthquake are studied using spectrum analysis and timehistory analysis. Different requirements according to different earthquake levels are met to ensure its safety.
Keywords:steel roof; circular structure; design; global stability; aseismic analysis; timehistory analysis