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Analyse de la vulnérabilité sismique des structures à ossature en bois : essais expérimentaux, modélisation numérique, calculs parasismiques

Abstract : This research aims at a better understanding of the vulnerability of timber-frame buildings against earthquakes. The behavior of these structures under seismic loading relies on their joints with metal fasteners (nails, screws, 3 dimensionnal connections, etc.). The numerical modeling of such a structure is based on a multi-scale approach, which allows to take into account the local behaviors at the structural scale. Three scales are defined: Scale 1: joints, scale 2: structural elements (shear walls, floors, roofs), scale 3: buildings. At each scale, a behavior law (hysteretic with damage) is used. The calibrations or validations are based on experimental tests. Tests on joints with metal fasteners are used to calibrate the numerical model at scale 1. A detailed finite elements (FE) model of shear wall is developped and its predictions are confronted to quasi-static and dynamic experimental results for validation. A simplified FE model of shear wall (macro element) is used to generate a numerical model at the building scale. This macro element, calibrated on the detailed FE model, accurately reproduces the dynamic behavior of a shear wall despite its simplicity. The numerical model of timber-frame buildings will be used to study, locally and globally, their behavior against earthquake in order to propose construction details and design adapted to these structures in seismic areas.
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  • HAL Id : tel-01683157, version 1

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Clément Boudaud. Analyse de la vulnérabilité sismique des structures à ossature en bois : essais expérimentaux, modélisation numérique, calculs parasismiques. Génie civil. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENI108⟩. ⟨tel-01683157⟩

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