Vulnerability assessment of reinforced concret structures submitted to out-of-plane loadings: application to a protective structure impacted by snow avalanches
Résumé
In the global warming context, more and more people are threathen by natural hazards. This paper focuses on the physical vulnerability assessment of RC (reinforced concrete) structures loaded by pressure distributions coming from snow avalanche flows. Risk analysis is a relevant tool to reduce the exposure of elements at risk and thus protect people against snow avalanches. In this framework, both the natural hazard and the vulnerability of the exposed elements at risk have to be describe. Therefore, the mechanical response of a typical RC structure subjected to out-of-plane dynamic loading has been modeled and analysed. The studied structure is a RC wall with a L-like shape. Experimental pushover tests have been performed and consisted in applying a uniform pressure distribution until the total collapse of the wall. A 2D Finite Element Model (FEM) has been developed to simulate the mechanical response of the structure under quasi-static and dynamic loadings, and simulations have been compared to experimental data. The transient loading of the snow avalanche is taken into account and several simulation campaigns are used for deriving the vulnerability of the RC wall as a function of the loading magnitude.
Domaines
Sciences de l'environnement
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