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Experimental and numerical study of shear interface response of hybrid thin CFRP–concrete slabs Mahboob, Amir Gil Espert, Lluís Bernat Masó, Ernest Eskenati, Amir Reza Universitat Politècnica de Catalunya. Doctorat en Anàlisi Estructural Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria Universitat Politècnica de Catalunya. LITEM - Laboratori per a la Innovació Tecnològica d'Estructures i Materials Àrees temàtiques de la UPC::Enginyeria dels materials::Materials compostos Carbon fiber-reinforced plastics CFRP Shear connection Hybrid slabs Experimental Numerical Plàstics reforçats amb fibra de carboni Hybrid slabs made of carbon-fiber-reinforced polymer (CFRP) and concrete provide a solution that takes advantage of the strength properties of both materials. The performance of the system strongly depends on the CFRP–concrete interaction. This study investigates the shear behavior in the interface of the two materials. Eight full-scale experiments were carried out to characterize the interface shear response of these hybrid elements using different connection solutions. An untreated surface is compared to a surface with aggregates, with a novel system comprising a flexible, straight glass fiber mesh and an inclined glass fiber mesh. The experimental results show that the fabric connection improves the friction between materials and is responsible for the pseudo-plastic performance of the specimens. The inclined mesh produces a more uniform tightening effect compared to the straight mesh. In simulations via the finite element method, we used an adjusted frictional model to reproduce the experiments. The authors gratefully acknowledge the financial support from the Ministry of Science, Innovation and Universities of the Spanish Government (MCIU), the State Agency of Research (AEI), and the ERDF (European Regional Development Fund) through the project SEVERUS (Multilevel evaluation of seismic vulnerability and risk mitigation of masonry buildings in resilient historical urban centers, ref. num. RTI2018-099589-B-I00). Moreover, we acknowledge partial financial support from the AZVI, S.A. company through the COMPOSITO project. Peer Reviewed Postprint (published version) 2021-09-09 Article Mahboob, A. [et al.]. Experimental and numerical study of shear interface response of hybrid thin CFRP–concrete slabs. "Materials", 9 Setembre 2021, vol. 14, núm. 18, p. 5184:1-5184:16. 1996-1944 https://hdl.handle.net/2117/355858 10.3390/ma14185184 eng https://www.mdpi.com/1996-1944/14/18/5184 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099589-B-I00/ES/EVALUACION MULTINIVEL DE LA VULNERABILIDADD SISMICA Y MITIGACION DE RIESGO DE EDIFICIOS DE OBRA DE FABRICA EN CENTROS URBANOS HISTORICOS RESILIENTES/ http://creativecommons.org/licenses/by/3.0/es/ Open Access Attribution 3.0 Spain application/pdf Multidisciplinary Digital Publishing Institute (MDPI)