PSI - Issue 47

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 47 (2023) 469–477

© 2023 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 IGF27 chairpersons Abstract The present study investigates the crack-induced degradation of vibration characteristics in FRP-strengthened reinforced concrete elements. Specifically, an innovative numerical method, based on the combination of an inter-element fracture approach and an embedded truss model, has been implemented into a 2D finite element framework to evaluate the progressive variation of the static and dynamic properties as the damage level increases. The obtained results have been compared with those obtained from the structural analysis performed on a reinforced concrete beam without the FRP system (denoted as control beam). The comparison highlights the reliability of the proposed model in determining both static response, in terms of the load-deflection curve, and dynamic response, in terms of degradation of natural vibration frequencies, for progressive damage levels. Moreover, the “Modal Assurance Criterion” (MAC) has been evaluated as an indicator to compute the correlation between the modal shapes in the damaged configurations and the undamaged ones. © 2023 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 IGF27 chairpersons Keywords: Structural health monitoring; FRP-strengthened structures; model-based damage detection; modal properties; cohesive zone model. 27th International Conference on Fracture and Structural Integrity (IGF27) A numerical study on the crack-induced dynamic characteristic degradation of FRP-plated RC structural components Umberto De Maio a , Daniele Gaetano a , Fabrizio Greco a* , Paolo Lonetti a , Raimondo Luciano b , Paolo Nevone Blasi a , Andrea Pranno a a Department of Civil Engineering, University of Calabria, Via P. Bucci Cubo 39B, Rende 87036, Italy b Department of Engineering, Parthenope University of Naples, Centro Direzionale Isola C4, Napoli 80133, Italy

* Corresponding author. Tel.: +39 0984-496916. E-mail address: fabrizio.greco@unical.it

2452-3216 © 2023 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 IGF27 chairpersons

2452-3216 © 2023 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 IGF27 chairpersons 10.1016/j.prostr.2023.07.077