Damping model-free analysis of a stochastic multi-scale frame element for earthquake engineering applications

Pierre Jehel (1, 2) , Hugues Vincent (2, 3) , Thomas Rodet (3)

1 MSSMat - Laboratoire de mécanique des sols, structures et matériaux
2 CEEM - Department of Civil Engineering and Engineering Mechanics
3 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie

The viscous damping forces commonly added in earthquake engineering applications lack a sound physical justification. Consequently, whether or not they accurately represent what they are added for is uncertain. In this paper, this latter source of uncertainty is removed, appealing to the concept of discrepancy forces, in the analysis of the capabilities of a nonlinear reinforced concrete frame elements to represent actual seismic behavior. Frame elements are modeled as fiber elements accommodating uniaxial concrete and steel behavior laws; two different nonlinear cyclic concrete behavior laws are considered: a stochastic multi-scale concrete model along with a more classical one. Concrete parameters are identified from experimental data using Bayesian inference technique. Finally, the capabilities of the two models to represent the actual response of a reinforced concrete frame element tested on a shaking table are compared in an objective way, that is without any side effect resulting from the action of uncertain damping forces.

Mots clés: Earthquake engineering; damping; stochastic multi-scale material model; frame structure; discrepancy forces; Bayesian inference

Domaines: Structures; Matériaux et structures en mécanique [physics.class-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des structures [physics.class-ph]

Pierre Jehel, Hugues Vincent, Thomas Rodet. Damping model-free analysis of a stochastic multi-scale frame element for earthquake engineering applications. International Conference on Computational Stochastic Mechanics (CSM-7), G. Deodatis and P. D. Spanos, Jun 2014, Santorini, Greece. ⟨10.3850/978-981-09-5348-5_033⟩. ⟨hal-01071341⟩