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Mathematical Problems in Engineering
Volume 2016 (2016), Article ID 7031712, 16 pages
Research Article

Seismic Performance Evaluations of Mega-Sub Isolation System

1Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
2Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510405, China

Received 4 January 2016; Revised 4 May 2016; Accepted 12 May 2016

Academic Editor: Oleg V. Gendelman

Copyright © 2016 Xiangxiu Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents mega-sub isolation system. Shaking table test of the mega-sub isolation system is carried out in this paper. Three test models have been developed. One is called aseismic model, in which all the substructures are fixedly connected with the megastructures. The second one is known as isolated model, where the substructures are connected with the megastructures with isolators, and the last one is called the lower substructure consolidated (LSC) model, in which all the substructures except for the substructures at the lowest level, in other words, substructures at the second mega floor, are isolated from the megastructures. Nonlinear dynamic time analysis of the test models is conducted by SAP2000. Acceleration responses of the megastructure, story drift responses of the megastructure and the substructure, and the deformations of the isolation layer are compared between experimental and numerical simulation results. The results show that the experimental results and numerical simulation results agree well with each other, and the isolated model and LSC model perform better than the counterpart aseismic model. The structures with isolation devices can reduce the structural responses effectively and are much safer than the structure without isolation devices.