Identification of an equivalent viscous damping function depending on engineering demand parameters - Laboratoire de mécanique et technologie Accéder directement au contenu
Article Dans Une Revue Engineering Structures Année : 2019

Identification of an equivalent viscous damping function depending on engineering demand parameters

Résumé

When performing a nonlinear time-history analysis of a reinforced concrete structure, it is necessary for the used structural model to dissipate the correct amount of energy. For the sake of computational efficiency, viscous damping models are still commonly used to account, partially or not, for non-viscous dissipations (e.g. friction between the crack surfaces, bond slip at the steel-concrete interface). In order to improve the physical relevance of such a substitution, an evolving equivalent viscous damping ratio estimated for a simply supported reinforced concrete beam is proposed in this paper. This work takes place in the scope of a moderate seismicity context for which steel yielding is not expected. The results are not directly identified from experimental results but rather from numerical simulations carried out thanks to an equivalent single-degree-of-freedom model, itself calibrated by means of quasi-static experiments. To begin with, the experimental setup used to calibrate the single-degree-of-freedom model and the equivalent viscous damping ratio assessment method are presented. Then, the single-degree-of-freedom model and the identification procedure are exposed. The resulting outputs are presented and commented. Finally, numerical experiments are performed in order to obtain equivalent viscous damping ratio values corresponding to a given maximum time-history curvature and a curvature demand.
Fichier principal
Vignette du fichier
S0141029618305121.pdf (3.08 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02079797 , version 1 (22-10-2021)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

T. Heitz, Cédric Giry, B. Richard, F. Ragueneau. Identification of an equivalent viscous damping function depending on engineering demand parameters. Engineering Structures, 2019, 188, pp.637-649. ⟨10.1016/j.engstruct.2019.03.058⟩. ⟨hal-02079797⟩
111 Consultations
223 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More