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Theses

Modélisation numérique des phénomènes d'amortissement par dissipation d'énergie matérielle dans les structures de type portique en béton armé sous séisme.

Abstract : Recently developed deformation-based seismic design methods rely on the prediction of the evolution of local quantities in nonlinear seismic analyses. When one aims at meeting this challenge, modeling damping with viscous models lacks a physical background and is thus a weak point. This thesis deals with the development of a physical representation of the material energy dissipation sources in reinforced concrete (RC) frame structures elements. We have formulated and implemented in a finite element program both a new fiber beam element based on the Euler-Bernoulli kinematics enhanced with displacement jumps and a new concrete material law capable of representing the main material energy dissipation sources in a computationally efficient way. The material model has been developed in the framework given by thermodynamics with internal variables and a mixed finite element method was retained for the numerical implementation. The simulations performed with this fiber element show that other than material dissipation sources should be added in the modeling and that this new element is capable of simulating the time-history of a RC frame structure within a satisfying computation time.
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https://tel.archives-ouvertes.fr/tel-00477015
Contributor : Pierre Jehel Connect in order to contact the contributor
Submitted on : Tuesday, April 27, 2010 - 6:15:18 PM
Last modification on : Monday, February 15, 2021 - 10:41:47 AM
Long-term archiving on: : Tuesday, September 28, 2010 - 12:41:27 PM

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  • HAL Id : tel-00477015, version 1

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Pierre Jehel. Modélisation numérique des phénomènes d'amortissement par dissipation d'énergie matérielle dans les structures de type portique en béton armé sous séisme.. Matériaux. École normale supérieure de Cachan - ENS Cachan, 2009. Français. ⟨tel-00477015⟩

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