大跨巨型钢框架结构隔震设计与分析
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（1 中南建筑设计院股份有限公司，武汉 430071； 2 广州大学土木工程学院，广州 510006）［摘要］广东科学中心常设展厅E区为大跨巨型钢框架结构，采用隔震技术，柱底设置隔震支座。由于柱距较大，无法设置统一的隔震层，另外，因风载较大，抗风与隔震的矛盾难以解决。工程经过详细分析、试验，创造性地采用了无统一隔震层的隔震设计，并设计采用了小直径、大高度、大铅芯橡胶支座作为抗风装置。这种支座具有初始刚度大而屈服后水平有效刚度小的特点，有效地解决了抗风与隔震的矛盾。详细介绍了工程的隔震设计、隔震支座的选型、布置与连接，以及隔震结构分析与试验结果。［关键词］隔震；铅芯橡胶支座；隔震层；巨型结构；钢结构；振动台试验Design and analysis of the isolated bearing for long-span steel mega-frame structureLi Ting1, Li Hongsheng1, Sun Zhaomin1, Zhang Jichao2(1 Central-south Architectural Design Institute Co., Ltd., Wuhan 430071, China;2 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)Abstract:The structure of area E in the exhibition hall of Guangdong Science Center is designed as a long-span steel mega-frame, using seismic isolation technology, with isolation bearings being laid on the bottom of frame columns. As the column spacing is too long to set continuous isolation layers, due to higher wind load, the contradiction between wind resistance and seismic isolation is difficult to solve. After detailed research and test, the discontinuous isolation layers has been creatively adopted in isolation design, and a new smaller diameter and larger height rubber bearing with larger lead core has been used for resistance wind plant. The new bearing has large initial stiffness and little effective stiffness to solve the contradiction beween seismic isolation and wind resistance. Details of seismic isolation design including type selection, layout and connection of the isolation bearings are introduced.Keywords:seismic isolation; lead rubber bearing; isolation layer; mega-structure; steel structure; shaking table test*广东省科技计划项目(2004B10101048),(2005A11601014),(2006B37301009)；建设部科技计划项目(2005K148),(2006K301),(2007K309)。作者简介：李霆，教授级高工，总工程师， Email:lting@vip.sina.com。参考文献［1］李霆,李宏胜,尹优，等.广东科学中心大跨巨型钢框架结构设计［J］.建筑结构,2010，40(8).［2］周福霖 工程结构减震控制［M］. 北京: 地震出版社, 1997.［3］［新］SKINNER R I, ROBINSON W H，MCVERRY G H.工程隔震概论［M］.谢礼立, 周雍年, 赵兴权，译. 北京: 地震出版社, 1996.［4］唐家祥, 刘再华. 建筑结构基础隔震［M］. 武汉:华中理工大学出版社, 1993.［5］周云. 土木工程减灾防灾学［M］. 广州: 华南理工大学出版社, 2002.［6］王可怡, 陈大宾, 郭曼丽, 等. 隔震支座在钢结构施工过程中的变形与服役监测［J］. 建筑结构，2010，40(8).
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