PSI - Issue 73

ScienceDirect Structural Integrity Procedia 00 (2025) 000 – 000 Structural Integrity Procedia 00 (2025) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 73 (2025) 163–169

23rd International Conference on Modelling in Mechanics 2025 Application of computational interface damage model to a concrete FRP shear connector Roman Vodička a *, Eva Kormaníková a , Daniel Dubecký a a Institute of Structural Engineering and Transportation Structures, Faculty of Civil Engineering, Technical University of Koši ce, Vysokoškolská 4, 042 00 Košice, Slovakia Abstract The paper explores utilisation of fibre-reinforced polymer (FRP) composites in bridge construction. Key advantages of FRP as a construction material are highlighted in relation to conventionally used materials to evaluate its effectiveness in applications to different structures. The analysis of computations for varied geometrical parameter of a jigsaw puzzle type of a continuous shear connector is also provided. For the concrete-FRP shear connector interface, a cohesive bilinear interface damage model based on a variational formulation has been chosen and implemented. The implementation introduces an interface damage variable to cope with degradation of the connector. The model also ensures the load displacement relationship which locally provides a softening zone. During debonding, it may affect the smoothness and continuity of the computed structural response for analysed quantities such as stress and the interface damage variable. Assessments based on the presented results guarantee suitability of the computational variational model as a tool for predicting failure, having potential for application in material design, in design of 23rd International Conference on Modelling in Mechanics 2025 Application of computational interface damage model to a concrete FRP shear connector Roman Vodička a *, Eva Kormaníková a , Daniel Dubecký a a Institute of Structural Engineering and Transportation Structures, Faculty of Civil Engineering, Technical University of Koši ce, Vysokoškolská 4, 042 00 Košice, Slovakia Abstract The paper explores utilisation of fibre-reinforced polymer (FRP) composites in bridge construction. Key advantages of FRP as a construction material are highlighted in relation to conventionally used materials to evaluate its effectiveness in applications to different structures. The analysis of computations for varied geometrical parameter of a jigsaw puzzle type of a continuous shear connector is also provided. For the concrete-FRP shear connector interface, a cohesive bilinear interface damage model based on a variational formulation has been chosen and implemented. The implementation introduces an interface damage variable to cope with degradation of the connector. The model also ensures the load displacement relationship which locally provides a softening zone. During debonding, it may affect the smoothness and continuity of the computed structural response for analysed quantities such as stress and the interface damage variable. Assessments based on the presented results guarantee suitability of the computational variational model as a tool for predicting failure, having potential for application in material design, in design of specific construction details, and structural elements. © 202 5 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organisers Keywords: cohesive damage model, energy formulation, concrete, FRP composite, shear connector, interface 1. Introduction The fibre-reinforced polymer (FRP) composites play the significant role across various industries, particularly in construction and bridge engineering. Their growing use in structural applications, including repair and strengthening © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the event organizers specific construction details, and structural elements. © 202 5 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organisers Keywords: cohesive damage model, energy formulation, concrete, FRP composite, shear connector, interface 1. Introduction The fibre-reinforced polymer (FRP) composites play the significant role across various industries, particularly in construction and bridge engineering. Their growing use in structural applications, including repair and strengthening

* Roman Vodička . Tel.: +421-55-602-4388 E-mail address: roman.vodicka@tuke.sk * Roman Vodička . Tel.: +421-55-602-4388 E-mail address: roman.vodicka@tuke.sk

2452-3216 © 202 5 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organizers 2452-3216 © 202 5 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organizers

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the event organizers 10.1016/j.prostr.2025.10.025