Under the hypothesis of perfect adhesion, corroborated by the use of highly resistant glues, delamination of FRP-reinforced masonry pillars turns out to be governed exclusively by the nonlinear behavior of the quasi-brittle, heterogeneous support. However, at a structural level, delamination response can be described effectively also by concentrating all the sources of dissipation and non-linearity at the masonry-FRP interface, and assuming the support to behave elastically. In this paper, a detailed and critical comparison between two different fully three-dimensional Finite Element models is developed: the first is a model in which only the masonry is damageable whilst the FRP reinforcement adheres perfectly to the support, whereas in the second a cohesive, zero-thickness interface between the FRP and the support is considered, whilst masonry behaves as a linear elastic material. The overall response during delamination and local traction distributions at the interface are critically investigated, varying the FRP reinforcement width.

Finite element model for FRP-from-masonry delamination: three-dimensional effects and interface traction assessment

MILANI, GABRIELE;FEDELE, ROBERTO
2011

Abstract

Under the hypothesis of perfect adhesion, corroborated by the use of highly resistant glues, delamination of FRP-reinforced masonry pillars turns out to be governed exclusively by the nonlinear behavior of the quasi-brittle, heterogeneous support. However, at a structural level, delamination response can be described effectively also by concentrating all the sources of dissipation and non-linearity at the masonry-FRP interface, and assuming the support to behave elastically. In this paper, a detailed and critical comparison between two different fully three-dimensional Finite Element models is developed: the first is a model in which only the masonry is damageable whilst the FRP reinforcement adheres perfectly to the support, whereas in the second a cohesive, zero-thickness interface between the FRP and the support is considered, whilst masonry behaves as a linear elastic material. The overall response during delamination and local traction distributions at the interface are critically investigated, varying the FRP reinforcement width.
Proceedings ICCS16, 16th International Conference on Composite Structures ICCS 16
Masonry; FRP reinforcement; 3D damage modeling; Heterogeneous approach; Interface model
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/612901
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