Evaluation of Seismic Isolation Schemes for a Historic Building

by Navin Amin, Chief; Structural Engineer,
Anoop Mokha, Chief; Structural Engineer,
Hamid Fatehi, Chief; Structural Engineer,
Peter Lee, Chief; Structural Engineer,

Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation


The U.S. Court of Appeals Ninth District building originally completed in 1905 with an expansion in 1933, suffered damage during the 1989 Loma Prieta earthquake. The building is currently being seismically retrofitted using seismic isolation along with additional shear wall strengthening. This paper presents a comprehensive approach adopted for evaluation of different isolation systems in the context of the entire project. Furthermore, the application of selected isolation system is also discussed.

Subject Headings: Seismic tests | Seismic effects | Base isolation | Historic buildings | Earthquake resistant structures | Shear walls | Building codes | Shear resistance | California | United States

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