Fibre Reinforced Cementitious Matrix (FRCM) composites are becoming increasingly popular for strengthening masonry structures for which the compatibility of the inorganic matrix with the chemical and physical properties of the support makes it advantageous to adopt such systems. However, despite the large use of FRCMs for strengthening applications, the characterization and modelling of the mechanical response in tension of these systems is an open issue. In fact, the constitutive tensile law of the composite shows to be affected by different variables, such as the clamping system adopted during tensile test, the gauge length used for recording strains, the monitoring of the number of yarns and the planarity of the textile within the composite thickness. In addition to these uncertainties, which influence the experimental tensile characterization, few information is available on the constitutive law that rules the fibre-matrix interface, which is essential for evaluating the load transfer during the post-crack stage of the composite, as already shown in the literature. For these reasons, the studies that provide indications on analytical or numerical modeling of the tensile behaviour of FRCM materials are still limited. This study presents the results of a series of FE numerical simulations, aimed at evaluating the tensile behaviour of FRCM composites. The elaborations are carried out through an appropriate definition of the sliding laws between the components (fibres and mortar) and a parametric analysis is performed by varying the type of fibre, the mechanical characteristics of the mortar and the interface bond law. The purpose of the study is to provide indications on the modeling of the tensile behaviour of FRCMs, with particular regards to the evaluation of the fibre-matrix interface behaviour. The numerical results are validated through comparison with some experimental data selected from those involving the use of natural fibres as reinforcement (for example basalt fibres). The performed analyses allow evaluating the influence of the selected parameters and obtaining a qualitative comparison on the mechanical performances of different types of reinforcement in terms of maximum tensile strength and ultimate strain.

Giovanni Minafò, Maria Concetta Oddo, Alessia Monaco, Jennifer D'Anna, Calogero Cucchiara, Lidia La Mendola (2019). A numerical study on the effect of the interface material model on the tensile behaviour of FRCM strips. In Atti del XVIII CONVEGNO ANIDIS, "L'INGEGNERIA SISMICA IN ITALIA".

A numerical study on the effect of the interface material model on the tensile behaviour of FRCM strips

Giovanni Minafò;Maria Concetta Oddo;Jennifer D'Anna;Calogero Cucchiara;Lidia La Mendola
2019-01-01

Abstract

Fibre Reinforced Cementitious Matrix (FRCM) composites are becoming increasingly popular for strengthening masonry structures for which the compatibility of the inorganic matrix with the chemical and physical properties of the support makes it advantageous to adopt such systems. However, despite the large use of FRCMs for strengthening applications, the characterization and modelling of the mechanical response in tension of these systems is an open issue. In fact, the constitutive tensile law of the composite shows to be affected by different variables, such as the clamping system adopted during tensile test, the gauge length used for recording strains, the monitoring of the number of yarns and the planarity of the textile within the composite thickness. In addition to these uncertainties, which influence the experimental tensile characterization, few information is available on the constitutive law that rules the fibre-matrix interface, which is essential for evaluating the load transfer during the post-crack stage of the composite, as already shown in the literature. For these reasons, the studies that provide indications on analytical or numerical modeling of the tensile behaviour of FRCM materials are still limited. This study presents the results of a series of FE numerical simulations, aimed at evaluating the tensile behaviour of FRCM composites. The elaborations are carried out through an appropriate definition of the sliding laws between the components (fibres and mortar) and a parametric analysis is performed by varying the type of fibre, the mechanical characteristics of the mortar and the interface bond law. The purpose of the study is to provide indications on the modeling of the tensile behaviour of FRCMs, with particular regards to the evaluation of the fibre-matrix interface behaviour. The numerical results are validated through comparison with some experimental data selected from those involving the use of natural fibres as reinforcement (for example basalt fibres). The performed analyses allow evaluating the influence of the selected parameters and obtaining a qualitative comparison on the mechanical performances of different types of reinforcement in terms of maximum tensile strength and ultimate strain.
Settore ICAR/09 - Tecnica Delle Costruzioni
Giovanni Minafò, Maria Concetta Oddo, Alessia Monaco, Jennifer D'Anna, Calogero Cucchiara, Lidia La Mendola (2019). A numerical study on the effect of the interface material model on the tensile behaviour of FRCM strips. In Atti del XVIII CONVEGNO ANIDIS, "L'INGEGNERIA SISMICA IN ITALIA".
File in questo prodotto:
File Dimensione Formato  
ANIDIS-2019_Minafòetal_1.pdf

Solo gestori archvio

Tipologia: Pre-print
Dimensione 870.93 kB
Formato Adobe PDF
870.93 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/412812
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact