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Global interventions for seismic upgrading of substandard RC buildings / G. E. Thermou in Journal of structural engineering, Vol. 138 N° 3 (Mars 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 3 (Mars 2012) . - pp. 387-401 Titre : Global interventions for seismic upgrading of substandard RC buildings Type de document : texte imprimé Auteurs : G. E. Thermou, Auteur ; S. J. Pantazopoulou, Auteur ; Amr S. Elnashai, Auteur Année de publication : 2012 Article en page(s) : pp. 387-401 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Buildings  Rehabilitation  Reinforced  concrete  Seismic  design  Columns  Walls Résumé : A methodology is developed in this paper for the design and proportioning of interventions for seismic upgrading of substandard reinforced-concrete (RC) buildings. The retrofit approach is presented in the form of a simple design tool that aims toward both demand reduction and enhancement of force and deformation supply through controlled modification of stiffness along the height of the building. This objective is achieved by engineering the translational mode-shape of the structure, so as to optimize the distribution of interstory drift. Results from the proposed approach are summarized in a spectrum format in which demand, expressed in terms of interstory drift, is related to stiffness. Design charts, which relate the characteristics of commonly used global intervention procedures to influence drift demands, are developed to facilitate the retrofit design. The intervention procedures considered in this paper are reinforced-concrete jacketing, the addition of reinforced-concrete walls, and the addition of masonry infills. The proposed methodology is also amenable to adaptation to other strengthening methods, such as the addition of cross-bracing. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v138/i3/p387_s1?isAuthorized=no [article] Global interventions for seismic upgrading of substandard RC buildings [texte imprimé] / G. E. Thermou, Auteur ; S. J. Pantazopoulou, Auteur ; Amr S. Elnashai, Auteur . - 2012 . - pp. 387-401. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 3 (Mars 2012) . - pp. 387-401 Mots-clés : Buildings  Rehabilitation  Reinforced  concrete  Seismic  design  Columns  Walls Résumé : A methodology is developed in this paper for the design and proportioning of interventions for seismic upgrading of substandard reinforced-concrete (RC) buildings. The retrofit approach is presented in the form of a simple design tool that aims toward both demand reduction and enhancement of force and deformation supply through controlled modification of stiffness along the height of the building. This objective is achieved by engineering the translational mode-shape of the structure, so as to optimize the distribution of interstory drift. Results from the proposed approach are summarized in a spectrum format in which demand, expressed in terms of interstory drift, is related to stiffness. Design charts, which relate the characteristics of commonly used global intervention procedures to influence drift demands, are developed to facilitate the retrofit design. The intervention procedures considered in this paper are reinforced-concrete jacketing, the addition of reinforced-concrete walls, and the addition of masonry infills. The proposed methodology is also amenable to adaptation to other strengthening methods, such as the addition of cross-bracing. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v138/i3/p387_s1?isAuthorized=no