(1 湖南大学土木工程学院，长沙 410082； 2 广州大学工程抗震研究中心，广州 510405)
［摘要］采用弹塑性时程分析法研究高层隔震建筑的抗震性能。对20层的框架、框-结构的抗震和隔震效果进行了对比分析，结果表明，抗震结构只能减小层间位移，其上部结构的地震反应加速度远大于隔震结构的。大震时，抗震结构的非结构构件损坏，内部设备倾倒，易造成次生灾害；大震后结构受损。应用隔震技术后，高层建筑在大震时，上部结构仍处在弹性状态，可以有效维持结构的功能，减少大震后对受损建筑的维修工作。隔震后的结构加速度响应显著降低，有利于保持建筑使用功能和提高地震时人员的舒适度。在目前对结构的地震反应仍然有很多不明确因素的状态下，采用隔震措施是一种有效防止结构受损的手段。
［关键词］基础隔震；高层建筑；隔震性能
Study on dynamic characteristics of base isolated high-ise building
Su Jian1, Wenliuhan·Heisha2, Zhou Fulin1, 2(1 College of Civil Engineering, Hunan University, Changsha 410082, China；2 Earthquake Engineering Research and Testing Center, Guangzhou University, Guangzhou 510405, China)
Abstract:The earthquake response analysis of high-ise building is carried out using elastic-lastic time history analysis method. Four 20-tory buildings of reinforced concrete frame structure, frame-hear wall structure, base isolated reinforced concrete frame structure and base isolated frame-hear wall structure, are respectively considered. It is verified that the maximum story drift of the seismic design structures decreases whereas the maximum acceleration response of seismic design structures is larger than that of the isolated structures. The seismic design buildings sustain plastic damage. The nonstructural components and equipments in these buildings are injured under severe earthquake. However, the superstructure of base isolated building remains elastic state and can still be used after earthquake. The acceleration response of the isolated building is reduced remarkablely. It is advantage to maintain function and keep people comfortable. Although there are many uncertain factors affecting the response of the structure under earthquake, base isolation is one of the best ways to prevent high-ise buildings from earthquake damage.
Keywords:base isolated structure; high-ise building; dynamic characteristics
国家自然科学基金重大研究计划“重大工程的动力灾变”重点项目“重大工程结构地震损
伤破坏的控制原理与方法”(90815027)。
作者简介：苏键，博士研究生，Email:sjbox@21cn.com。
参考文献
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［2］周福霖.工程结构减震控制［M］.北京：地震出版社，1997.
［3］CECS126:2001叠层橡胶支座隔震设计规程［S］. 北京：中国工程建设标准化协会，2001.