WRS-BTU Seismic Isolator Performances

  • Renato Brancati
  • Giandomenico Di Massa
  • Stefano Pagano
  • Ernesto Rocca
  • Salvatore Strano
Conference paper

Abstract

This paper describes an experimental investigation conducted on WRS-BTU seismic isolators that are constituted by a wire rope spring coupled with a ball transfer unit. The device can be considered rigid along the vertical direction while the horizontal stiffness can be independently chosen to shift the natural period away from the period range having the most of earthquake energy. Two kinds of tests were carried out: the first ones regard the isolator characterization; then, to evaluate the isolation efficiency, a small laboratory structure was equipped with four isolators and several tests on a shake-table were performed.

Keywords

Ball transfer unit Hysteresis Nonlinear dynamics Seismic isolators Shake-table tests Wire rope springs 

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Renato Brancati
    • 1
  • Giandomenico Di Massa
    • 1
  • Stefano Pagano
    • 1
  • Ernesto Rocca
    • 1
  • Salvatore Strano
    • 1
  1. 1.Dipartimento di Ingegneria IndustrialeUniversità degli Studi di Napoli Federico IINaplesItaly

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