Eccentric rocking bearings with a designable friction property for seismic isolation

Experiment and analysis

Lyan-Ywan Lu, Chia Chiea Hsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The friction coefficient plays a critical role in a friction-type isolator, since it determines the transmitted seismic force and the energy dissipation capacity of the isolator, simultaneously. However, the choice of feasible sliding materials that possess appropriate friction coefficients is very limited, and this has restricted the development and applications of friction-type isolators. To overcome this, an isolator called the eccentric rocking bearing (ERB) with the property of designable friction is introduced in this study. By using an eccentric rolling mechanism, the ERB bearing is self-centering and its effective friction coefficient is adjustable by a geometric parameter that can be designed by engineers. The results of a shaking table test conducted on an ERB-isolated full-scale structure have confirmed the feasibility and efficiency of the ERB bearings for seismic isolation. Additionally, the high consistency between the simulated and experimental dynamic responses verifies the method developed to analyze the ERB.

Original languageEnglish
Pages (from-to)869-895
Number of pages27
JournalEarthquake Spectra
Volume29
Issue number3
DOIs
Publication statusPublished - 2013 Aug 1

Fingerprint

Bearings (structural)
seismic isolation
eccentrics
isolation
friction
Friction
isolators
coefficient of friction
experiment
Experiments
shaking table test
dynamic response
energy dissipation
shaking
sliding
analysis
engineers
Dynamic response
Energy dissipation
Engineers

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

Cite this

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abstract = "The friction coefficient plays a critical role in a friction-type isolator, since it determines the transmitted seismic force and the energy dissipation capacity of the isolator, simultaneously. However, the choice of feasible sliding materials that possess appropriate friction coefficients is very limited, and this has restricted the development and applications of friction-type isolators. To overcome this, an isolator called the eccentric rocking bearing (ERB) with the property of designable friction is introduced in this study. By using an eccentric rolling mechanism, the ERB bearing is self-centering and its effective friction coefficient is adjustable by a geometric parameter that can be designed by engineers. The results of a shaking table test conducted on an ERB-isolated full-scale structure have confirmed the feasibility and efficiency of the ERB bearings for seismic isolation. Additionally, the high consistency between the simulated and experimental dynamic responses verifies the method developed to analyze the ERB.",
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Eccentric rocking bearings with a designable friction property for seismic isolation : Experiment and analysis. / Lu, Lyan-Ywan; Hsu, Chia Chiea.

In: Earthquake Spectra, Vol. 29, No. 3, 01.08.2013, p. 869-895.

Research output: Contribution to journalArticle

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