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Estimation of error factors in concrete cable-stayed structures with sensitivity of creep / Jong-Bum Park in Journal of structural engineering, Vol. 137 N° 12 (Décembre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1451-1459 Titre : Estimation of error factors in concrete cable-stayed structures with sensitivity of creep Type de document : texte imprimé Auteurs : Jong-Bum Park, Auteur ; Jung Il Park, Auteur ; Jae-Yeol Cho, Auteur Année de publication : 2012 Article en page(s) : pp. 1451-1459 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Creep  Concrete  cable-stayed  bridge  Model  uncertainty  factor  Parameter  estimation Résumé : This study proposes a method for estimating the properties of concrete creep and the unstrained length of cable, by using measured displacements and cable tension forces, in a concrete cable-stayed structure over time. The method is proposed on the basis of minimizing the differences between the actual measured responses of the structure and the predicted values that were calculated by using finite element analysis. The creep model uncertainty factor was introduced to characterize the incompleteness or inadequacy of the deterministic formulas of a given model. This factor was selected as the sole parameter to be estimated from the parameters relevant to the creep model. The numerical examples used in this analysis revealed good feasibility of this methodology for parameter estimation. These examples also supported the importance of considering concrete creep properties as a structural error factor in concrete cable-stayed structures. The estimated concrete creep properties may be used to reduce the long-term error associated with concrete creep in concrete cable-stayed structures. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i12/p1451_s1?isAuthorized=no [article] Estimation of error factors in concrete cable-stayed structures with sensitivity of creep [texte imprimé] / Jong-Bum Park, Auteur ; Jung Il Park, Auteur ; Jae-Yeol Cho, Auteur . - 2012 . - pp. 1451-1459. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1451-1459 Mots-clés : Creep  Concrete  cable-stayed  bridge  Model  uncertainty  factor  Parameter  estimation Résumé : This study proposes a method for estimating the properties of concrete creep and the unstrained length of cable, by using measured displacements and cable tension forces, in a concrete cable-stayed structure over time. The method is proposed on the basis of minimizing the differences between the actual measured responses of the structure and the predicted values that were calculated by using finite element analysis. The creep model uncertainty factor was introduced to characterize the incompleteness or inadequacy of the deterministic formulas of a given model. This factor was selected as the sole parameter to be estimated from the parameters relevant to the creep model. The numerical examples used in this analysis revealed good feasibility of this methodology for parameter estimation. These examples also supported the importance of considering concrete creep properties as a structural error factor in concrete cable-stayed structures. The estimated concrete creep properties may be used to reduce the long-term error associated with concrete creep in concrete cable-stayed structures. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i12/p1451_s1?isAuthorized=no