A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Natural Hazards and Earth System Sciences Année : 2014

A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches

Résumé

Snow avalanches are a threat to many kinds of elements (human beings, communication axes, structures, etc.) in mountain regions. For risk evaluation, the vulnerability assessment of civil engineering structures such as buildings and dwellings exposed to avalanches still needs to be improved. This paper presents an approach to determine the fragility curves associated with reinforced concrete (RC) structures loaded by typical avalanche pressures and provides quantitative results for different geometrical configurations. First, several mechanical limit states of the RC wall are defined using classical engineering approaches (Eurocode 2), and the pressure of structure collapse is calculated from the usual yield line theory. Next, the fragility curve is evaluated as a function of avalanche loading using a Monte Carlo approach, and sensitivity studies (Sobol indices) are conducted to estimate the respective weight of the RC wall model inputs. Finally, fragility curves and relevant indicators such a their mean and fragility range are proposed for the different structure boundary conditions analyzed. The influence of the input distributions on the fragility curves is investigated. This shows the wider fragility range and/or the slight shift in the median that has to be considered when a possible slight change in mean/standard deviation/inter-variable correlation and/or the non-Gaussian nature of the input distributions is accounted for.
Fichier principal
Vignette du fichier
gr2014-pub00043711.pdf (1.82 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01122179 , version 1 (03-03-2015)

Identifiants

Citer

P. Favier, D. Bertrand, Nicolas Eckert, Mohamed Naaim. A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches. Natural Hazards and Earth System Sciences, 2014, 14 (3), pp.689-704. ⟨10.5194/nhess-14-689-2014⟩. ⟨hal-01122179⟩
142 Consultations
146 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More