A warping model for reinforced concrete beams under multiaxial loading

Sophie Capdevielle (1) , Stéphane Grange (1, 2) , Frédéric Dufour (1, 2) , Cédric Desprez (3)

1 3SR - Laboratoire sols, solides, structures - risques [Grenoble]
2 RV - Risques, Vulnérabilité des structures et comportement mécanique des matériaux
3 IFSTTAR/MAST/SDOA - Sécurité et Durabilité des Ouvrages d'Art

The present research focuses on the numerical modelling of structures using the multiber beam element method. A formulation to account for shear warping is developed. The local warping degrees of freedom are computed along with the global beam degrees of freedom by satisfying the structure equilibrium. In the case of pure torsion, the evolution of the warping shape only depends on the concrete damage state. The comparison of numerical and experimental torque-twist curves ascertains the importance of including torsional warping in the formulation. Ongoing work tests the numerical behaviour of structural elements subject to transverse shear warping.

Mots clés: torsion; warping; concrete; damage; nonlinear analysis; finite elements; multifiber beams; nite elements; multiber beams

Domaines: Génie civil; Structures; Matériaux

Sophie Capdevielle, Stéphane Grange, Frédéric Dufour, Cédric Desprez. A warping model for reinforced concrete beams under multiaxial loading. 22e Congrès Français de Mécanique (CFM 2015), Aug 2015, Lyon, France. ⟨hal-01697666⟩