Analytical design models for geotechnical seismic isolation systems

Hing-Ho Tsang (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
22 Downloads (Pure)

Abstract

Geotechnical Seismic Isolation (GSI) can be defined as a new category of seismic isolation techniques that involve the dynamic interaction between the structural system and geo-materials. Whilst the mechanism of various GSI systems and their performance have already been demonstrated through different research methods, there is a missing link between fundamental research and engineering practice. This paper aims to initiate the development in this direction. A new suite of equivalent-linear foundation stiffness and damping models under the same framework is proposed for four GSI configurations, one of which is a novel combination of two existing ones. The exact solutions for the equivalent dynamic properties of flexible-base systems have also been derived that explicitly include the foundation inertia and the strain-dependent equivalent damping of foundation materials, which are both significant for GSI systems. The application of the proposed analytical design models has been illustrated through response history analyses and a detailed hand-calculation design procedure has also been outlined and demonstrated.

Original languageEnglish
Pages (from-to)3881-3904
Number of pages24
JournalBulletin of Earthquake Engineering
Volume21
Issue number8
Early online date25 Jul 2022
DOIs
Publication statusPublished - Jun 2023

Keywords

  • Design procedure
  • Equivalent-linear
  • Flexible-base period
  • Foundation damping
  • Geotechnical seismic isolation
  • Soil–structure interaction

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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