PSI - Issue 41

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

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

Procedia Structural Integrity 41 (2022) 618–630

© 2022 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 MedFract2Guest Editors. Abstract In this work, the effects of damage on the mechanical and vibrational response of reinforced concrete structures is investigated. The proposed model is based on a cohesive interface approach able to simulate the diffuse cracking behavior typical of reinforced concrete structures, in conjunction with an embedded truss model, able to simulate interaction phenomena between steel reinforcement and surrounding concrete. The mathematical model is developed to describe in a realistic way the crack pattern and its evolution and to determine the main factors that can influence the static and dynamic response of damaged reinforced concrete structures. Their static and dynamic properties were evaluated for increasing levels of damage after the removal of the load, starting from the load level at the first crack nucleation to the load level of incipient collapse. In order to verify the accuracy and reliability of the proposed computational model, the numerical results, obtained in terms of variations of the vibrational characteristics of the system will also be compared with experimental data reported in literature. Results show the applicability and reliability of damage identification procedures based on both mathematical models and experimental data for structural systems such as reinforced concrete beams common in girder bridges. © 2022 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 MedFract2Guest Editors. Keywords: Structural Health Monitoring; Reinforced Concrete Beams; Simulation-Based Damage Detection; Modal Properties; Diffuse Cracking; Cohesive Fracture. 2nd Mediterranean Conference on Fracture and Structural Integrity A Cohesive fracture approach for the nonlinear analysis of load induced degradation of vibration characteristics in RC beams Andrea Pranno a , Fabrizio Greco a, *, Paolo Lonetti a , Daniele Gaetano a , Claudio Le Piane b , Umberto De Maio a a Department of Civil Engineering, University of Calabria, Via P. Bucci Cubo 39B, Rende 87036, Italy b Provincial Administratio of Cosenza, Corso Telesio 17, 87100 Cosenza, Italy Abstract In this work, the effects of damage on the mechanical and vibrational response of reinforced concrete structures is i vestigated. T e proposed model is bas d on a cohesive inte face pproach able to simulate the diffuse racking behav or typical of reinforced concrete tructures, in conju ction with an embedded truss model, able to simulate interaction henomena betw en steel r infor em nt and surrounding concret . The mathematical mode is developed to des ribe in a realistic way the crack pattern and its evolutio a d to det rmine the main fa tors that can influence he static and dyn mic response of damaged rei forced c ncrete structur s. Their static d dynamic properties wer evalu ed for increas ng level of damage aft r the r moval of the load, starting from the load level at the first crack nucleation to the load level of incipient collaps . In rder to v rify the accuracy and reliability of the proposed compu ational model, th numerical r sults, obtained in t ms of variations of the vibration l characteristics of the system will lso b compared with xperimental ata r ported in literature. R sults show the pplicability and reliability of damag identification procedu es based on both mathematical models and experimental data for structural systems such s reinforced concrete beams common i girder bridges. © 2022 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 u der re ponsibility of MedFract2Guest Editors. K ywords: Str ctural Health Monitoring; Reinforced Concr te Beams; Simulation-Based Damage Detection; Modal Properties; Diffuse Cracking; Cohesive Fracture. 2nd Mediterranean Conference on Fracture and Structural Integrity A Cohesive fracture approach for the nonlinear analysis of load induced degradation of vibration characteristics in RC beams Andrea Pranno a , Fabrizio Greco a, *, Paolo Lonetti a , Daniele Gaetano a , Claudio Le Piane b , Umberto De Maio a a Department of Civil Engineering, University of Calabria, Via P. Bucci Cubo 39B, Rende 87036, Italy b Provincial Administration of Cosenza, Corso Telesio 17, 87100 Cosenza, Italy

* Corresponding author. Tel.: +390984496916. E-mail address: fabrizio.greco@unical.it * Corresponding author. Tel.: +390984496916. E-mail address: fabrizio.greco@unical.it

2452-3216 © 2022 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 MedFract2Guest Editors. 2452-3216 © 2022 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 u der responsibility of t MedFract2Guest Editors.

2452-3216 © 2022 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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.070