Seismic isolators of variable stiffness for earthquakes with strong long-period components

Lyan-Ywan Lu, I. Ling Yeh

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

3 Citations (Scopus)

Abstract

In order to mitigate the excessive isolator displacement that is usually induced by a near-fault earthquake, two new types of seismic isolators with variable stiffness (SIVS) are introduced and investigated experimentally in this study. By properly choosing the geometric parameters of the two SIVS isolators, the isolation stiffness of the isolators becomes a function of the isolator displacement, rather than a fixed value. The geometries of both isolators are defined by using six-order polynomials, so that the stiffness of the isolators has a softening behavior followed by a hardening behavior when the isolator displacement increases. The softening and hardening behaviors aim to reduce the structural acceleration and isolator drift, respectively. In order to verify the feasibility and effectiveness of the proposed SIVS isolators, a shaking table test was conducted on the prototypes of both SIVS isolators. The test results are highlighted and alsocompared with the theoretical ones in this paper.

Original languageEnglish
Title of host publicationProceedings of the 2009 Structures Congress - Don't Mess with Structural Engineers
Subtitle of host publicationExpanding Our Role
Pages841-849
Number of pages9
DOIs
Publication statusPublished - 2009 Sep 14
Event2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role - Austin, TX, United States
Duration: 2009 Apr 302009 May 2

Publication series

NameProceedings of the 2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role

Other

Other2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role
CountryUnited States
CityAustin, TX
Period09-04-3009-05-02

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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