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| Titel |
A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches |
| VerfasserIn |
P. Favier, D. Bertrand, N. Eckert, M. Naaim |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 3 ; Nr. 14, no. 3 (2014-03-27), S.689-704 |
| Datensatznummer |
250118341
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| Publikation (Nr.) |
 copernicus.org/nhess-14-689-2014.pdf |
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| Zusammenfassung |
| 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. |
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