FraMCoS 9 2016 Berkeley, California, USA

Probabilistic Fragility Analysis of the Cohesive Crack Models

The zero thickness, fracture mechanics inspired cohesive crack model has been widely used in its various formulations. The constitutive model being formulated in terms of about fourteen parameters, yet only few can be measured experimentally, and other must be estimated.…

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Year 2016
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Abstract

The zero thickness, fracture mechanics inspired cohesive crack model has been widely used in its various formulations. The constitutive model being formulated in terms of about fourteen parameters, yet only few can be measured experimentally, and other must be estimated. This paper performs a sensitivity analysis to assess the relative importance of each of the param- eters resulting in the model Tornado diagram. For the most sensitive parameters, uncertainty quan- tification is performed through Latin Hypercube Sampling to determine capacity and fragility curves. Finally, impact of correlation among the parameters is assessed. Thestudyisconductedbyperformingpushoveranalysisofasimpleinterfaceelementundermode I and II, and dynamic analysis of a dam with joint elements subjected to mixed-modefracture. Thisin- vestigation leads to a probabilistic-based safety assessment of structures which responses is primarily governed by cohesive cracking.