Time-domain analysis of frictional base isolation using geosynthetics

M. G. Arab, Edward Kavazanjian

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

4 Scopus citations

Abstract

The low interface shear strength of many geosynthetic interfaces offers the potential for cost effective seismic hazard mitigation by frictional base isolation. To facilitate engineering evaluation of performance, previous investigators have suggested values of equivalent linear stiffness and damping for use in frequency-domain seismic response analyses of geosynthetic base isolation systems. However, time-domain finite difference analyses using an elastic-perfectly plastic interface model indicate that frequency-domain analyses conducted using these equivalent linear parameters may significantly underestimate the seismic response of a frictional base isolated mass subject to earthquake-generated strong ground motions. Underestimation of the response is attributed to the use of damping values from uniform sinusoidal loading tests for the duration of the earthquake time history. Additional analyses are required to develop practical recommendations for use of frequency domain analysis in design of geosynthetic base isolation systems.

Original languageEnglish (US)
Title of host publication9th International Conference on Geosynthetics - Geosynthetics
Subtitle of host publicationAdvanced Solutions for a Challenging World, ICG 2010
PublisherBrazilian Chapter of the International Geosynthetics Society
Pages695-698
Number of pages4
ISBN (Print)9788563456007
StatePublished - Jan 1 2010
Event9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 - Guaruja, Brazil
Duration: May 23 2010May 27 2010

Publication series

Name9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010

Other

Other9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010
CountryBrazil
CityGuaruja
Period5/23/105/27/10

Keywords

  • Base isolation
  • Earthquake
  • Geosynthetics
  • Interface shear strength
  • Seismic
  • Time domain

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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