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 language | English |
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Pages (from-to) | 3881-3904 |
Number of pages | 24 |
Journal | Bulletin of Earthquake Engineering |
Volume | 21 |
Issue number | 8 |
Early online date | 25 Jul 2022 |
DOIs | |
Publication status | Published - 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