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Seismic Upgrading of a Fire-Brigade Building by Base Isolation in Basel, Switzerland

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Abstract:

Recently, the main building of the professional fire brigade of the city and canton Basel-Stadt built in the year 1943 was placed on special seismic elastomeric bearings and sliding bearings. This is the first such seismic upgrading of an existing building, north of the European Alps. Compared to conventional strengthening, the building costs were significantly smaller, and no temporary transfer of the fire-brigade troops and operational facilities to an expensive provisional building was necessary. Moreover, the resulting seismic safety is considerably higher, and the vulnerability to a severe earthquake is essentially smaller than in the case of conventional strengthening. Therefore, softening instead of strengthening was a much better upgrading strategy.

Keywords: BASE ISOLATION; DAMPING; ELASTOMERIC BEARINGS; FREQUENCY SHIFT; SEISMIC UPGRADING OF BUILDINGS

Document Type: Research Article

DOI: http://dx.doi.org/10.2749/101686610792016880

Publication date: August 1, 2010

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    Structural Engineering International (SEI), the quarterly Journal of IABSE, published since 1991, is the leading international journal of structural engineering dealing with all types of structures and materials. SEI offers its readers a unique blend of short profiles on recent structures, and longer, in-depth technical articles on research, development, design, construction and maintenance. Articles are written by practicing engineers and academia from around the world and reflect the high standards of IABSE. IABSE Peer Review stamps are given to papers that have passed through a highly selective review process and demonstrate a significant contribution to the state of structural engineering knowledge.To recognise contributions of the highest quality, an Outstanding Paper Award is presented each year.

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