Influence of Behavior Models on the Response of a Reinforced Concrete Frame: Multi-Fiber Approach

Authors: A. Kahil, A. Nekmouche, N. Khelil, I. Hamadou, M. Hamizi, Ne. Hannachi

Abstract:

The objective of this work is to study the influence of the nonlinear behavior models of the concrete (concrete_BAEL and concrete_UNI) as well as the confinement brought by the transverse reinforcement on the seismic response of reinforced concrete frame (RC/frame). These models as well as the confinement are integrated in the Cast3m finite element calculation code. The consideration of confinement (TAC, taking into account the confinement) provided by the transverse reinforcement and the non-consideration of confinement (without consideration of containment, WCC) in the presence and absence of a vertical load is studied. The application was made on a reinforced concrete frame (RC/frame) with 3 levels and 2 spans. The results show that on the one hand, the concrete_BAEL model slightly underestimates the resistance of the RC/frame in the plastic field, whereas the concrete_uni model presents the best results compared to the simplified model "concrete_BAEL", on the other hand, for the concrete-uni model, taking into account the confinement has no influence on the behavior of the RC/frame under imposed displacement up to a vertical load of 500 KN.

Keywords: Reinforced concrete, nonlinear calculation, behavior laws, fiber model confinement, numerical simulation.

Digital Object Identifier (DOI): doi.org/1

References:

[1] Arede, 1997, A. Arede, « Seismic assessment of reinforced concrete frame structures with a new flexibility based element », PhD Thesis, Universidade do Porto préparée au JRC Ispra, October 1997.
[2] Chung HS, Yang KH, Lee YH, Aun HC, 2002, «Stress-strain curve of laterally confined concrete. Eng. Struct ». 2002;24(9):1153-63
[3] D-Combescure, 2001, Rapport DM2S « Modélisation des structures de génie civil sous chargement sismique à l’aide de CASTEM 2000 », 122 pages, année 06/03/2001.
[4] Fardis, 1991, M. Fardis, «Member – type models for the non linear seismic response analysis of reinforced concrete structures » in Experimental and numerical methods in earthquake engineering, EURO Courses, Reliability and risk analysis, Volume 2, Ispra 1991.
[5] Panagiotis Kotronis, 2008, Panagiotis Kotronis « Stratégies de Modélisation de Structures en Béton Soumises à des Chargements Sévères. » Thèse de diplôme d’habilitation à diriger des recherches- Université Joseph Fourier en France année 2008.
[6] Règles Bael 91 révisées 99, Règles techniques de conception et de calcul des ouvrages et constructions en béton armé suivant la méthode des états limites, Afnor, Février 2000
[7] Stéphan Moulin, 2009, Stéphane Moulin document R3.08.08 code aster « Élément de poutre multifibre (droite) » Année 2009.
[8] Xuan Huy Nguyen, 2006, Xuân Huy Nguyen «Vulnérabilité des structures en béton armé à voiles porteurs: expérimentation et modélisation.» Thèse de doctorat-Institue national polytechnique de Grenoble en France année 2006.