Design of passive systems for control of inelastic structures / Gian Paolo Cimellaro in Earthquake engineering structural dynamics, Vol. 38 N° 6 (Mai 2009)  

Public ISBD [article]  inEarthquake engineering structural dynamics > Vol. 38 N° 6 (Mai 2009) . - pp. 783-804 Titre : Design of passive systems for control of inelastic structures Type de document : texte imprimé Auteurs : Gian Paolo Cimellaro, Auteur ; Oren Lavan, Auteur ; Reinhorn, Andrei M., Auteur Article en page(s) : pp. 783-804 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : passive control  design  inelastic structures Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : A design strategy for control of buildings experiencing inelastic deformations during seismic response is formulated. The strategy is using weakened, and/or softened, elements in a structural system while adding passive energy dissipation devices (e.g. viscous fluid devices, etc.) in order to control simultaneously accelerations and deformations response during seismic events. A design methodology is developed to determine the locations and the magnitude of weakening and/or softening of structural elements and the added damping while insuring structural stability. A two-stage design procedure is suggested: (i) first using a nonlinear active control algorithm, to determine the new structural parameters while insuring stability, then (ii) determine the properties of equivalent structural parameters of passive system, which can be implemented by removing or weakening some structural elements, or connections, and by addition of energy dissipation systems. Passive dampers and weakened elements are designed using an optimization algorithm to obtain a response as close as possible to an actively controlled system. A case study of a five-story building subjected to El Centro ground motion, as well as to an ensemble of simulated ground motions, is presented to illustrate the procedure. The results show that following the design strategy, a control of both peak inter-story drifts and total accelerations can be obtained. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121502892/abstract [article] Design of passive systems for control of inelastic structures [texte imprimé] / Gian Paolo Cimellaro, Auteur ; Oren Lavan, Auteur ; Reinhorn, Andrei M., Auteur . - pp. 783-804. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N° 6 (Mai 2009) . - pp. 783-804 Mots-clés : passive control  design  inelastic structures Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : A design strategy for control of buildings experiencing inelastic deformations during seismic response is formulated. The strategy is using weakened, and/or softened, elements in a structural system while adding passive energy dissipation devices (e.g. viscous fluid devices, etc.) in order to control simultaneously accelerations and deformations response during seismic events. A design methodology is developed to determine the locations and the magnitude of weakening and/or softening of structural elements and the added damping while insuring structural stability. A two-stage design procedure is suggested: (i) first using a nonlinear active control algorithm, to determine the new structural parameters while insuring stability, then (ii) determine the properties of equivalent structural parameters of passive system, which can be implemented by removing or weakening some structural elements, or connections, and by addition of energy dissipation systems. Passive dampers and weakened elements are designed using an optimization algorithm to obtain a response as close as possible to an actively controlled system. A case study of a five-story building subjected to El Centro ground motion, as well as to an ensemble of simulated ground motions, is presented to illustrate the procedure. The results show that following the design strategy, a control of both peak inter-story drifts and total accelerations can be obtained. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121502892/abstract

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