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《Earthquake Engineering and Engineering Vibration》 2004-01
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Experimental seismic study of concrete structures with base and roof isolation systems

HAN Chuan-feng~(1),LI Chun-xiang~(2),ZHANG Qun-hui~3(1.Institute of Development and Management of Urban Infrastructure, Tongji University, Shanghai 200092,China; 2.School of Civil Engineering and Mechanics, Shanghai Jiaotong University, Shanghai 200030,.China; 3.Jining Institute of Building Design and Research,Jining 272125,China)  
A comparative study has been carried out on the control performances of the base isolation and the proposed roof isolation with resort to a seismic simulator (i.e. shaking table) with the size 4.0m×4.0m in plane. The whole experiment in this study includes three three-story concrete frame structure models with no isolation, base isolation, and roof isolation, respectively. The roof isolation consists of the slab and the laminated rubber bearings (LRB) that support it. Three types of seismic ground motions, namely the El Centro 1940 N-S ground motions, the simulated Shandong artificial ground motions (SDW), and the simulated Shanghai artificial ground motions (SHW) are applied to the shaking table. The control performances of the base isolation and the roof isolation are first evaluated by assessing the dynamic characteristics of three three-story models under the white noise ground motion excitations. The experimental results show that, the base isolation and the roof isolation are all capable of reducing the displacement and acceleration responses (including the interstory drifts) of structures significantly, but the former can render better effectiveness with respect to the latter. Nevertheless, the proposed roof isolation has the potential to become an attractive way to mitigate the earthquake damage to low- and medium-rise buildings due to its easier manufacturing in comparison to the base isolation.
【Fund】: 山东省科学技术发展计划项目(1995-80-1)
【CateGory Index】: TU317
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