An experimental study on seismic isolation using a leverage-type stiffness controllable system

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The technique of semi-active isolation with variable-stiffness property has been proven theoretically to be an effective means for seismic protection of equipment or structural systems. To demonstrate the feasibility of this technique, a shaking table test is conducted in this study. The seismic response of a novel isolation system called the leverage-type stiffness controllable isolation system (LSCIS) controlled by a newly developed controller called the least input energy method (LIEC) and some traditional control laws are investigated. The LSCIS is able to vary its isolation stiffness in real time by adjusting the position of the pivot point on its lever arm. The LIEC controller, which is designed particularly for variable stiffness systems, reduces the transmitted seismic motion of the LSCIS by minimizing the input seismic energy of the system. As demonstrated by the test, the acceleration response and seismic input energy of the LSCIS can be significantly reduced by properly adjusting the isolation stiffness which is controlled by the LIEC controller. As compared to traditional control strategies, the LIEC is able to achieve the best acceleration reduction rate for the LSCIS, and meanwhile requires the least demands on control energy and control force.

Original languageEnglish
Title of host publication5th International Conference on Advances in Experimental Structural Engineering, AESE 2013
PublisherEUCENTRE
ISBN (Electronic)9780000000002
Publication statusPublished - 2013 Jan 1
Event5th International Conference on Advances in Experimental Structural Engineering, AESE 2013 - Taipei, Taiwan
Duration: 2013 Nov 82013 Nov 9

Publication series

NameInternational Conference on Advances in Experimental Structural Engineering
Volume2013-November
ISSN (Electronic)2522-2503

Other

Other5th International Conference on Advances in Experimental Structural Engineering, AESE 2013
CountryTaiwan
CityTaipei
Period13-11-0813-11-09

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

Fingerprint Dive into the research topics of 'An experimental study on seismic isolation using a leverage-type stiffness controllable system'. Together they form a unique fingerprint.

Cite this