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.

Probabilistic seismic response assessment of linear systems equipped with nonlinear viscous dampers / Tubaldi, Enrico; Ragni, Laura; Dall'Asta, Andrea. - In: EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS. - ISSN 0098-8847. - STAMPA. - 44:1(2015), pp. 101-120. [10.1002/eqe.2461]

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

RAGNI, LAURA
Membro del Collaboration Group
;
2015-01-01

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.
2015
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Descrizione: "This is the peer reviewed version of the following article: Tubaldi, E., Ragni, L. and Dall'Asta, A. (2014), Probabilistic seismic response assessment of linear systems equipped with nonlinear viscous dampers, Earthquake Engng Struct. Dyn., 44, 101– 120, doi: 10.1002/eqe.2461, which has been published in final form at https://doi.org/10.1002/eqe.2461. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited."
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11566/225408
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