Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems
Aim of the paper is to present a one dimensional simple model for the study of the bond behavior of Fabric Reinforced Cementitious Matrix (FRCM) strengthening systems externally applied to structural substrates. The equilibrium of an infinitesimal portion of the reinforcement and the mortar layers c...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2018-12-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2232 |
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| author | Ernesto Grande Maura Imbimbo Sonia Marfia Elio Sacco |
| author_facet | Ernesto Grande Maura Imbimbo Sonia Marfia Elio Sacco |
| author_sort | Ernesto Grande |
| collection | DOAJ |
| description | Aim of the paper is to present a one dimensional simple model for the study of the bond behavior of Fabric Reinforced Cementitious Matrix (FRCM) strengthening systems externally applied to structural substrates. The equilibrium of an infinitesimal portion of the reinforcement and the mortar layers composing the strengthening systems allows to derive the governing equations. An analytical solution is determined solving the system of differential equations. In particular, in the first part of the paper a nonlinear shear-stress slip law characterized by a brittle post-peak behavior with a residual shear strength in the post peak phase is introduced for either the lower reinforcement-mortar interface (approach 1) or both the lower and the upper interface (approach 2). In the latter approach, a calibration of the shear strength of the upper interface is proposed in order to implicitly account for the effect of the damage of the mortar on the bond behavior. In the second part of the paper it is presented the solution of the problem in the case of softening behavior by approximating the shear-stress slip law throughout a step function. Comparisons with experimental data, available in literature, are presented in order to assess the reliability of the proposed approach. |
| format | Article |
| id | doaj-art-c595f78a8ef846a98f159e4e1695ac37 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-c595f78a8ef846a98f159e4e1695ac372025-01-03T00:40:26ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932018-12-011347Numerical simulation of the de-bonding phenomenon of FRCM strengthening systemsErnesto Grande0Maura ImbimboSonia MarfiaElio SaccoUniversity Guglielmo MarconiAim of the paper is to present a one dimensional simple model for the study of the bond behavior of Fabric Reinforced Cementitious Matrix (FRCM) strengthening systems externally applied to structural substrates. The equilibrium of an infinitesimal portion of the reinforcement and the mortar layers composing the strengthening systems allows to derive the governing equations. An analytical solution is determined solving the system of differential equations. In particular, in the first part of the paper a nonlinear shear-stress slip law characterized by a brittle post-peak behavior with a residual shear strength in the post peak phase is introduced for either the lower reinforcement-mortar interface (approach 1) or both the lower and the upper interface (approach 2). In the latter approach, a calibration of the shear strength of the upper interface is proposed in order to implicitly account for the effect of the damage of the mortar on the bond behavior. In the second part of the paper it is presented the solution of the problem in the case of softening behavior by approximating the shear-stress slip law throughout a step function. Comparisons with experimental data, available in literature, are presented in order to assess the reliability of the proposed approach.https://www.fracturae.com/index.php/fis/article/view/2232FRCMDe-bondingAnalytical modelInterface |
| spellingShingle | Ernesto Grande Maura Imbimbo Sonia Marfia Elio Sacco Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems Fracture and Structural Integrity FRCM De-bonding Analytical model Interface |
| title | Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems |
| title_full | Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems |
| title_fullStr | Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems |
| title_full_unstemmed | Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems |
| title_short | Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems |
| title_sort | numerical simulation of the de bonding phenomenon of frcm strengthening systems |
| topic | FRCM De-bonding Analytical model Interface |
| url | https://www.fracturae.com/index.php/fis/article/view/2232 |
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