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The GSI framework synthesises a range of soil-foundation-based isolation mechanisms that have evolved through research and practice over several decades. While some practical implementations predate the formal introduction of the term, they exhibit mechanisms that are now classified within the GSI framework. Other initiatives have been explicitly developed under the GSI terminology and conceptual structure.
The GSI framework synthesises a range of soil-foundation-based isolation mechanisms that have evolved through research and practice over several decades. While some practical implementations predate the formal introduction of the term, they exhibit mechanisms that are now classified within the GSI framework. Other initiatives have been explicitly developed under the GSI terminology and conceptual structure.
The examples below illustrate pilot infrastructure applications, commercial deployment, community-based implementation, and field evidence relevant to GSI principles.
The examples below illustrate pilot infrastructure applications, commercial deployment, community-based implementation, and field evidence relevant to GSI principles.
Pilot Infrastructure Application
Pilot Infrastructure Application
Rion Antirion Bridge, Greece
Rion Antirion Bridge, Greece
The foundation design strategy incorporated mechanisms that were later systematised within the GSI framework. Although the terminology was not in use at the time, the project represents an early infrastructure-scale example of foundation-based seismic demand modification.
The foundation design strategy incorporated mechanisms that were later systematised within the GSI framework. Although the terminology was not in use at the time, the project represents an early infrastructure-scale example of foundation-based seismic demand modification.
Seismic energy dissipation was enabled through horizontal sliding at the interface between the raft foundation and a well-controlled gravel layer, consistent with the Capacity Design Principles, designed by Alain Pecker. The bridge was opened to traffic in 2004.
Pecker A (1998) Capacity Design Principles for Shallow Foundations in Seismic Areas, Keynote lecture, Proceedings XIth European Conference on Earthquake Engineering. Eds. Bisch, Labbé, & Pecker. Paris, France.
18th Mallet-Milne Lecture:
Pecker A (2023) Interrelationships between practice, standardisation and innovation in geotechnical earthquake engineering. Bull Earthquake Eng 21, 3091–3132, https://doi.org/10.1007/s10518-023-01669-z
Commercial Deployment
Commercial Deployment
Smart-G, Italy
Smart-G, Italy
The adoption of GSI concepts in an industrial context demonstrates the translational potential of foundation-based isolation strategies from research to practical implementation.
The adoption of GSI concepts in an industrial context demonstrates the translational potential of foundation-based isolation strategies from research to practical implementation.
Smart-G, an academic spin-off of the University of Napoli Federico II, directed by Professor Alessandro Flora, has developed and commercialised solutions explicitly framed within the GSI terminology and mechanism-based approach.
https://www.smart-g.eu/research/geotechnical-seismic-isolation/
The company holds an Italian patent related to GSI-based technology.
Community-Based Implementation
Community-Based Implementation
Rural Housing, Nepal
Rural Housing, Nepal
Following the 2015-2016 Nepal earthquakes, foundation-based seismic design strategies informed by the GSI framework were incorporated into community-oriented housing initiatives. These efforts demonstrated the applicability of GSI principles in resource-constrained environments and their relevance for resilient vernacular construction.
Following the 2015-2016 Nepal earthquakes, foundation-based seismic design strategies informed by the GSI framework were incorporated into community-oriented housing initiatives. These efforts demonstrated the applicability of GSI principles in resource-constrained environments and their relevance for resilient vernacular construction.
Design guidance was developed to support local implementation within prevailing construction practices, led by Dr. Shanker Dhakal, GHEaSES International Pvt. Ltd., Kathmandu
Group for Rural Infrastructure Development (GRID) Nepal (https://www.gridnepal.org.np/)
Field Observations & Evidence
Field Observations & Evidence
2011 Mw 9.0 Tōhoku Earthquake, Japan
2011 Mw 9.0 Tōhoku Earthquake, Japan
Post-earthquake field investigations provided empirical observations of foundation and retaining systems exhibiting performance characteristics consistent with GSI mechanisms.
Post-earthquake field investigations provided empirical observations of foundation and retaining systems exhibiting performance characteristics consistent with GSI mechanisms.
Tyre-based retaining wall systems demonstrated resilience under strong ground motion, offering insight into material-based energy dissipation.
Led by Professor Hemanta Hazarika, Kyushu University, Fukuoka, Japan
Supported by NIED, Giken Corporation & Japan Foundation Eng Co.
Damaged Concrete Sea Wall (left) vs Undamaged Tyre Retaining Wall (right) after the 2011 M9 Earthquake in Japan (Hazarika et al. 2023):
https://doi.org/10.1007/s10518-023-01690-2
These observations contribute to the broader evidence base supporting foundation-level seismic response modification.
Continued collaboration among researchers, engineers, industry stakeholders, and policymakers will further support the responsible translation of GSI principles into practice across diverse infrastructural and socio-economic contexts.
Continued collaboration among researchers, engineers, industry stakeholders, and policymakers will further support the responsible translation of GSI principles into practice across diverse infrastructural and socio-economic contexts.
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