Probabilistic seismic response assessment of linear systems equipped with nonlinear viscous dampers

Enrico Tubaldi, Laura Ragni, Andrea Dall'Asta

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The paper aims at evaluating the influence of damper properties on the probabilistic seismic response of structural systems equipped with nonlinear viscous dampers. For this purpose, a linear single-degree-of-freedom system with an added linear or nonlinear viscous damper is considered, and the response statistics are evaluated for a set of natural records describing the ground motion uncertainty. A dimensional analysis of the seismic problem is carried out first to identify the minimum set of characteristic parameters describing the system and controlling the seismic response. An extensive parametric study is then performed to estimate the influence of the damper properties on the statistics of the main response quantities of interest (i.e. maximum displacements, accelerations and damper forces), for a wide range of values of the characteristic parameters. Finally, a set of case studies is investigated to show some interesting issues concerning the influence of the damper nonlinear behaviour on the evaluation of the system reliability and to highlight some limitations of current deterministic approaches neglecting the probabilistic properties of the response.

Original languageEnglish
Pages (from-to)101-120
Number of pages20
JournalEarthquake Engineering and Structural Dynamics
Volume44
Issue number1
Early online date18 Jul 2014
DOIs
Publication statusPublished - 31 Jan 2015

Keywords

  • nonlinear viscous dampers
  • performance-based engineering
  • probabilistic response
  • seismic risk

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