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Experimental and analytical investigation on bond between Carbon-FRCM materials and masonry
Affiliation:1. Dipartimento di Costruzioni e Restauro, Università di Firenze, Piazza Brunelleschi 6, 50121 Firenze, Italy;2. Dipartimento di Ingegneria Civile, Università di Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy;3. Università eCampus, Via Isimbardi 10, 22060 Novedrate (CO), Italy;1. University of Padova, via Marzolo 9, Padova 35131, Italy;2. University of Hartford, 200 Bloomfield Avenue, West Hartford, CT 06117, USA;3. Missouri S&T, 1401 North Pine Street, Rolla, MO 65409, USA;1. Department of Civil Engineering, University of Patras, Patras, Greece;2. Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, USA;3. Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Bologna, Italy;4. Department of Civil, Architectural, and Environmental Engineering, University of Padova, Padova, Italy;1. University of Naples Federico II, Department of Structures for Eng. and Arch., Via Claudio 21, 80125 Naples, Italy;2. University Claude Bernard Lyon 1, Laboratory of Composite Materials for Construction (LMC2), Site Bohr, 82 Boulevard Niels Bohr, Campus de la DOUA, 69622 Villeurbanne Cedex, France;3. University of Sannio, Engineering Department, Piazza Roma 21, 82100 Benevento, Italy;4. Roma Tre University, Department of Engineering, Via Vito Volterra 62, 00146 Rome, Italy;5. Cracow University of Technology, Faculty of Civil Engineering Warszawska 24, 31-155 Cracow, Poland;6. University of Minho, Department of Civil Engineering, Azurém, 4800-058 Guimarães, Portugal;7. CERTIMAC c/o ENEA Tecnologie dei Materiali Faenza (TEMAF), Via Granarolo 62, 48018 Faenza, RA, Italy;8. University of Patras, Department of Civil Engineering, GR-26500 Patras, Greece;9. University of Padova, Via Marzolo 9, 35131 Padova, Italy;10. University “G. d’Annunzio” of Chieti-Pescara, Department of Engineering and Geology, Viale Pindaro 42, 65127 Pescara, Italy;1. Università Politecnica delle Marche, Engineering Faculty, Ancona, Italy;2. University of Miami, Dept. of Civil, Arch. & Environ. Engineering, Miami, USA
Abstract:Historical masonry constructions often need to be strengthened and upgraded to satisfy current seismic code requirements. Recently many interventions have been done bonding composite materials to the surface of existing masonry elements. The effectiveness of these interventions strongly depends on the bond between the strengthening material and the masonry and on the mechanical properties of the masonry substrate. In this paper the bond between fiber reinforced cementitious matrix (FRCM) materials made out of a Carbon net embedded in a cement based matrix and the masonry is experimentally and analytically investigated. Experimental results of double shear tests involving different bond lengths are presented. The results evidence that the debonding occurs at the fibers/matrix interface after a considerable fibers/matrix slip. They also confirms the effectiveness of the Carbon-FRCM materials as external reinforcements for masonry structures. The obtained experimental results are used to calibrate a local bond-slip relation that is essential in the modeling of the structural behavior of masonry elements strengthened with Carbon-FRCM.
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