Experimental verification of polynomial friction pendulum isolators for near-fault seismic isolation

Lyan-Ywan Lu, J. Wang, S. W. Yeh

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

2 Citations (Scopus)

Abstract

In order to improve the performance of seismic isolated structures in near-fault areas, a new type of sliding isolation bearings called Polynomial Friction Pendulum Isolator (PFPI) is proposed in this study. Different from a conventional friction pendulum system (FPS), the geometry of the sliding surface of a PFPI isolator is defined by a sixth-order polynomial function. As a result, the stiffness of the PFPI 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 of the PFPI concept, an element test on prototype PFPI isolators and a shaking table test on a structure isolated by PFPI were all conducted. The result of the shaking table test demonstrates that when subjected to an earthquake with a long-period pulse component, the PFPI system is able to effectively suppress the maximum isolator drift, without causing the amplification of the structural acceleration.

Original languageEnglish
Title of host publicationProceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Pages1065-1071
Number of pages7
Publication statusPublished - 2008 Nov 12
Event4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction - Melbourne, VIC, Australia
Duration: 2007 Sep 262007 Sep 28

Publication series

NameProceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
Volume2

Other

Other4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction
CountryAustralia
CityMelbourne, VIC
Period07-09-2607-09-28

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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  • Cite this

    Lu, L-Y., Wang, J., & Yeh, S. W. (2008). Experimental verification of polynomial friction pendulum isolators for near-fault seismic isolation. In Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction (pp. 1065-1071). (Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction; Vol. 2).