Development of an interface numerical model for C-FRPs applied on flat and curved masonry pillars

Milani, Gabriele, Fagone, Mario, Rotunno, Tommaso, Grande, Ernesto and Bertolesi, Elisa ORCID: https://orcid.org/0000-0003-3258-0743 2020. Development of an interface numerical model for C-FRPs applied on flat and curved masonry pillars. Composite Structures 241 , 112074. 10.1016/j.compstruct.2020.112074

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Abstract

A novel interface numerical model for the incremental analysis of the debonding phenomenon of Carbon Fiber Reinforced Polymer (C-FRP) reinforcements externally applied on flat and curved masonry pillars is presented. The interface tangential stress-slip behavior is suitably described by a exponential function, that accounts for the ductility and residual strength variation due to the presence of interfacial normal stresses, according to a frictional-cohesive relationship. Such dependence is particularly important when dealing with C-FRP reinforcements applied to masonry curved structures (i.e. arches and vaults). The smooth interface relationship here adopted allows to deal with a boundary value problem for a system of second order differential equations, representing a standard delamination problem, without singularities. Consequently, an easy and robust numerical solution algorithm based on a standard finite differences approach can be adopted. The model is validated against some experimental and numerical results obtained previously by the authors and concerning shear-lap bond tests of flat and curved masonry pillars reinforced by C-FRP sheets. The obtained results underline an excellent robustness and reliability of the experimental global and local behavior.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0263-8223
Date of Acceptance:	14 February 2020
Last Modified:	14 Dec 2023 11:45
URI:	https://orca.cardiff.ac.uk/id/eprint/164058

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