Automated finite element updating using strain data for the lifetime reliability assessment of bridges

Nader M Okasha (1) , Dan M Frangopol (1) , André Orcesi (2)

1 Department of Civil & Environmental Engineering, Engineering Research Center for Advanced Technology for Large Structural Systems (ATLSS), Lehigh University
2 IFSTTAR/SOA - Département Structures et Ouvrages d'Art

The importance of improving the understanding of the performance of structures over their lifetime under uncertainty with information obtained from structural health monitoring (SHM) has been widely recognized. However, frameworks that efficiently integrate monitoring data into the life-cycle management of structures are yet to be developed. The objective of this paper is to propose and illustrate an approach for updating the lifetime reliability of aging bridges using monitored strain data obtained from crawl tests. It is proposed to use automated finite element model updating techniques as a tool for updating the resistance parameters of the structure. In this paper, the results from crawl tests are used to update the finite element model and, in turn, update the lifetime reliability. The original and updated lifetime reliabilities are computed using advanced computational tools. The approach is illustrated on an existing bridge.

Mots clés: PONT; DUREE DE VIE; FIABILITE; METHODE DES ELEMENTS FINIS

Domaines: Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

Nader M Okasha, Dan M Frangopol, André Orcesi. Automated finite element updating using strain data for the lifetime reliability assessment of bridges. Reliability Engineering and System Safety, 2012, 99, pp 139-150. ⟨10.1016/j.ress.2011.11.007⟩. ⟨hal-01063966⟩