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Seismic isolation of buildings using devices based on sliding between surfaces with variable friction coefficient

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Abstract

Base isolators are effective tools that favor a high level of building performance under lateral load, providing protection to both structural and non-structural elements. In this context, this paper discusses the possibility of employing materials with different frictional properties to enhance the response of flat- and curved-surface base isolators. Two innovative devices, referred to as “BowTie” and “BowC”, are introduced and discussed in some detail. A series of non-linear time history analyses is then conducted using a customized computer program and considering a number of case study structures, designed applying a displacement-based approach. The results of the analyses are used to discuss the key differences between variable friction and constant friction sliding isolation devices. It is shown that the newly proposed isolators may represent an improvement on classic base isolation solutions, in light of their higher energy absorption capacity, which contributes to significantly enhancing their performance.

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Acknowledgements

Most of the material reported in this paper has been originally presented by Calvi et al. [7].

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Authors and Affiliations

  1. IUSS Pavia and Eucentre, Pavia, Italy

    Gian Michele Calvi

  2. Department of Civil and Environmental Engineering, University of Washington, Seattle, USA

    Paolo M. Calvi

  3. Studio Calvi, Pavia, Italy

    Matteo Moratti

Authors
  1. Gian Michele Calvi
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  2. Paolo M. Calvi
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  3. Matteo Moratti
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Corresponding author

Correspondence to Gian Michele Calvi.

Additional information

This paper was selected from GeoMEast 2017—Sustainable Civil Infrastructures: Innovative Infrastructure Geotechnology.

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Calvi, G.M., Calvi, P.M. & Moratti, M. Seismic isolation of buildings using devices based on sliding between surfaces with variable friction coefficient. Innov. Infrastruct. Solut. 2, 39 (2017). https://doi.org/10.1007/s41062-017-0081-8

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