RESEARCH ARTICLE
Dynamic Reliability Analysis of Mega-Sub Isolation System Under Random Ground Motion
Xiangxiu Li*, Xiaojun Li, Aiwen Liu, Qiumei He
Article Information
Identifiers and Pagination:
Year: 2017Volume: 11
First Page: 822
Last Page: 829
Publisher ID: TOCIEJ-11-822
DOI: 10.2174/1874149501711010822
Article History:
Received Date: 06/07/2017Revision Received Date: 06/09/2017
Acceptance Date: 29/9/2017
Electronic publication date: 31/10/2017
Collection year: 2017
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Introduction:
The equation of motion of the mega-sub isolation system is derived in the present study. Then, the parameter optimization of the mega-sub isolation system is studied to illustrate the effects of the damping and stiffness of the isolation devices on the reliability of the system.
Methods:
Moreover, based on the first passage mechanism, the calculation procedure of the dynamic reliability of the system is presented. In this procedure, the story drift of the structure is used as the evaluation.
Results and Conclusion:
Numerical example shows that when the damping ratio of the isolation device is given, the overall reliability of the structure increases at first then decreases with increased frequency ratio, when the frequency ratio is constant, the overall reliability of the structure increases with increased damping ratio. In addition, compared to the aseismic system, the overall reliability of the mega-sub isolation system is significantly improved.