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- Title
Assessing fragility of a reinforced concrete element to snow avalanches using a non-linear mass-spring model.
- Authors
Favier, Philomène; Bertrand, David; Eckert, Nicolas; Ousset, Isabelle; Naaim, Mohamed
- Abstract
This paper presents an assessment of the fragility of a Reinforced Concrete (RC) element subjected to avalanche loads within a reliability framework. In order to obtain accurate numerical results with supportable computation times, we propose a light and efficient Single-Degree-Of-Freedom (SDOF) numerical model for an RC element. The model represents the behavior of an RC wall, summing up the main physics involved. Non-linearity was taken into account by a moment-curvature approach, which describes the overall bending response until collapse. The SDOF model was validated by a finite element as well as yield line theory analyses. It was then embedded within a reliability framework to evaluate the failure probability as a function of avalanche pressure. Several reliability methods were implemented and compared, suggesting that non-parametric methods provide significant results at a moderate level of computational burden. The sensitivity to material properties, such as tensile and compressive strengths, steel reinforcement ratio, and wall geometry was also investigated. Finally, the obtained fragility curves were discussed with respect to the few proposals available in the snow avalanche engineering field. This systematic approach will prove useful in refining formal and practical risk assessments and could be applied to other phenomena that also lack fragility curves.
- Subjects
REINFORCED concrete; AVALANCHES; ENGINEERING
- Publication
Natural Hazards & Earth System Sciences Discussions, 2017, p1
- ISSN
2195-9269
- Publication type
Article
- DOI
10.5194/nhess-2017-347