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Communication Dans Un Congrès Année : 2016

Reinforcement of a cracked steel plate using CFRP bonding

Résumé

Old steel bridges made in mild steel or wrought iron were assembled by riveting, an assembly technique which is no longer used today. This one induces stress concentration, residual stresses creation and leads to fatigue prone details in such bridges. Cracking that propagates from a rivet hole, hidden by rivet head, is the typical phenomenon of fatigue damage of riveted members. Thus, especially because of increase traffic, fatigue is among the major issues for old steel highway and railway bridges (over 100 years old). Moreover, these structures are often considered as historical ones and modifications of the original element must be limited. For all these reasons, CFRP composites seem to be a good solution that could lead to fatigue life increase. Fibre-reinforced polymer (FRP) has been widely used to strengthen concrete structures and has a great potential to strengthen steel structures. However, limited amount of research has been done on the application of these materials to old steel materials. This paper deals with the study of cracked steel elements and their reinforcement by adhesively bonded carbon fiber-reinforced polymer (CFRP) under fatigue loading. Studied specimens have typical dimensions encountered in old steelriveted joints. A real crack is propagated at the edge of the hole under fatigue loading and composites materials are then bonded taking into consideration the size of the rivet head. Several different CFRP systems were tested and their efficiency compared. Test results, theoretical and modeling considerations of the different studied configurations are presented in this paper
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Dates et versions

hal-01488281 , version 1 (13-03-2017)

Identifiants

  • HAL Id : hal-01488281 , version 1

Citer

Emilie Lepretre, Sylvain Chataigner, Lamine Dieng, Laurent Gaillet. Reinforcement of a cracked steel plate using CFRP bonding. MCD2016, 8th Rilem International Conference on Mechanisms of Cracking and Debonding in Pavements, Jun 2016, Nantes, France. 7p. ⟨hal-01488281⟩
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