(1 华东建筑设计研究院有限公司  上海 200002； 2 同济大学  上海 200092)
［提要］  上海铁路南站是上海新建的重要交通枢纽，是第一座采用开敞式候车空间、采用圆形平面布置的火车站。环向布置的内、外两圈柱子支撑起总跨度275m的大空间，并保证了中心150m直径的候车区形成开阔的无柱空间。整个钢屋盖结构复杂，在设计中攻克了多道难关，针对其中钢屋盖整体稳定研究及三水准设防的抗震研究进行介绍。钢屋盖整体稳定包括两个层次：屋盖体系的几何非线性分析与单根主梁的双非线性分析。抗震研究除进行多遇地震下的谱分析及时程分析外，还进行了中震及罕遇地震下的时程分析。通过对不同地震作用提出不同设计要求的方法来实现三水准设防的抗震思想。
［关键词］  上海铁路南站  钢屋盖  整体稳定  抗震  时程分析
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