Structural robustness analysis: From local to global damage
KAGHO GOUADJIO ; ORCESI ; CREMONA
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
KAGHO GOUADJIO ; ORCESI ; CREMONA
Résumé / Abstract
This paper proposes a reliability-based approach to quantify structural robustness of civil engineering infrastructures. As specified in the Eurocodes, robustness is meant to prevent disproportionate damage. A good robustness indicator should then quantify the impact of local damage on major structural consequences (global damage). In a context of multiple uncertainties associated with loads, material and structural properties, using a probabilistic approach is justified. In order to identify the most probable failure path (global damage) starting from the failure of one failure element (local damage), several types of failure path methodologies are used. The probabilistically most dominant failure paths are identified using inner and outer analyses. Based on the failure path with the highest probability of occurrence, several robustness indices can be built, by comparing the probability/risk of local damage occurrence with the probability/risk of having global damage. This approach is applied to two numerical examples. This paper compares the results obtained with each of the two analyses, in terms of efficiency and computational time.
