Probabilistic seismic response assessment of linear systems equipped with nonlinear viscous dampers |
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| Authors: | Enrico Tubaldi Laura Ragni Andrea Dall'Asta |
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| Institution: | 1. School of Architecture and Design, University of Camerino, Ascoli Piceno (AP), Italy;2. Department of Civil and Building Engineering and Architecture, Polytecnic University of Marche, Ancona (AN), Italy |
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| 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. Copyright © 2014 John Wiley & Sons, Ltd. |
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| Keywords: | nonlinear viscous dampers probabilistic response performance‐based engineering seismic risk |
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