Shrinkage and fatigue of cement-based bonded overlays: About its modelling

Title: Shrinkage and fatigue of cement-based bonded overlays: About its modelling
Author(s): J. L. Granju
Paper category : conference
Book title: International RILEM TC 193-RLS Workshop on Bonded Concrete Overlays
Editor(s): J.L. Granju and J. Silfwerbrand
Print-ISBN: None
e-ISBN: 2912143837
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 49 - 55
Total Pages: 7
Nb references: 9
Language: English

Abstract: To be relevant with in-situ behaviour, experiment and calculation about thin bonded overlays must take into account the effects of the shrinkage straining of the overlay and of a fatigue loading. Shrinkage induces built-in stresses at the origin of earlier cracking. Fatigue damages the interlocking in the cracks and at the interface. It is by this way that it acts to propagate cracks and debonding at constant maximum load level. Moreover, the interlocking contribution of a fibre reinforcement being less damaged than the one of the cementitious matrix, fatigue enhances the beneficial effect of fibre reinforcement of the overlay. This paper proposes a tentative method to take into account, in a simple way, the coupled effects of shrinkage and fatigue. It must be considered as a base for discussion about the problem of fatigue modelling, notably when accompanied by shrinkage.

Online publication: 2004-12-20
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143624.007