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Probabilistic estimate of seismic response design values of RC frames / D'Ambrisi, Angelo in Earthquake engineering structural dynamics, Vol. 38 N° 15 (Décembre 2009) 

Public ISBD [article]  in Earthquake engineering structural dynamics > Vol. 38 N° 15 (Décembre 2009) . - pp. 1709-1727 Titre : Probabilistic estimate of seismic response design values of RC frames Type de document : texte imprimé Auteurs : D'Ambrisi, Angelo, Auteur ; Mezzi, Marco, Auteur Article en page(s) : pp. 1709-1727 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Reinforced  concrete  frames;  Nonlinear  seismic  response;  Conservative  design  values;  Probabilistic  estimate Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Probabilistically controlled design values of the nonlinear seismic response of reinforced concrete frames are obtained using a method previously proposed by the authors. The method allows to calculate conservative design values characterized by a predefined non-exceedance probability, using a limited number of spectrum-fitting generated accelerograms. Herein the method is applied to elastic-strain hardening single degree of freedom systems representative of RC framed structures and is then assessed with reference to four reinforced concrete model frames designed according to EC8. The frames are characterized by different natural periods and aspect ratios. The results, compared with those obtained applying current EC8 recommendations, show the effectiveness of the proposed method. EC8 provides for design values of the seismic response of a structure with a nonlinear behavior computed as the mean value of the responses to seven accelerograms or as the maximum value of the responses to three accelerograms. These two criteria lead to design values characterized by very different and uncontrolled non-exceedance probability levels, while the proposed method allows the analyst to directly control the non-exceedance probability level of the calculated design values. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe [article] Probabilistic estimate of seismic response design values of RC frames [texte imprimé] / D'Ambrisi, Angelo, Auteur ; Mezzi, Marco, Auteur . - pp. 1709-1727. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N° 15 (Décembre 2009) . - pp. 1709-1727 Mots-clés : Reinforced  concrete  frames;  Nonlinear  seismic  response;  Conservative  design  values;  Probabilistic  estimate Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Probabilistically controlled design values of the nonlinear seismic response of reinforced concrete frames are obtained using a method previously proposed by the authors. The method allows to calculate conservative design values characterized by a predefined non-exceedance probability, using a limited number of spectrum-fitting generated accelerograms. Herein the method is applied to elastic-strain hardening single degree of freedom systems representative of RC framed structures and is then assessed with reference to four reinforced concrete model frames designed according to EC8. The frames are characterized by different natural periods and aspect ratios. The results, compared with those obtained applying current EC8 recommendations, show the effectiveness of the proposed method. EC8 provides for design values of the seismic response of a structure with a nonlinear behavior computed as the mean value of the responses to seven accelerograms or as the maximum value of the responses to three accelerograms. These two criteria lead to design values characterized by very different and uncontrolled non-exceedance probability levels, while the proposed method allows the analyst to directly control the non-exceedance probability level of the calculated design values. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe