PSI - Issue 62

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 ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 62 (2024) 955–962

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) SHM-based digital twin calibration of a post-tensioned reinforced concrete bridge with vertically prestressed internal joints Francesco Mariani a *, Giuseppe Galassi Sconocchia b , Andrea Meoni a , Laura Ierimonti a , Matteo Castellani a , Elisa Tomassini a , Ilaria Venanzi a , Filippo Ubertini a a University of Perugia, Via G. Duranti 93, Perugia 06125, Italy b Anas spa, Via O. Tramontani 52, Perugia 06135, Italy Abstract Post-tensioned concrete box-girder bridges exhibit complex time-varying behavior due to factors like creep, shrinkage, and steel relaxation. Predicting these phenomena accurately at the design phase is a difficult task, often leading to underestimation of their impact. Particularly in bridges constructed using a balanced cantilever scheme and cast-in-place concrete, the aging process and the timing of load application can influence the time-dependent behavior of the structure. The combination of these effects can result in significant vertical displacements and serviceability issues that necessitate careful consideration. The Italian Bridge Guidelines introduced specific evaluations for post-tensioned concrete bridges, which often require the support of FE models for accurate safety evaluation. The paper reports the investigations carried out on a very challenging post-tensioned concrete box girder bridge with vertically prestressed internal joints. The main objective is to calibrate a predictive FE model of the bridge by integrating information from design reports and drawings, static and dynamic non-destructive experimental tests as well as onsite inspections and digital surveys to characterize the presence of defects. The data obtained from the test campaign are utilized to build an accurate model, which is further calibrated to become an actual digital twin of the real structure employing ambient vibration tests (AVT) to identify the dynamic behavior of the structure. The digital twin thus obtained will serve as a tool for performing reliability analyses and predicting future serviceability or collapse issues. © 2024 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 Scientific Board Members Keywords: post tensioned bridges; digital twin; structural health monitoring; concrete creep; Operational Modal Analysis; numerical simulations. II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) SHM-based digital twin calibration of a post-tensioned reinforced concrete bridge with vertically prestressed internal joints Francesco Mariani a *, Giuseppe Galassi Sconocchia b , Andrea Meoni a , Laura Ierimonti a , Matteo Castellani a , Elisa Tomassini a , Ilaria Venanzi a , Filippo Ubertini a a University of Perugia, Via G. Duranti 93, Perugia 06125, Italy b Anas spa, Via O. Tramontani 52, Perugia 06135, Italy Abstract Post-tensioned concrete box-girder bridges exhibit complex time-varying behavior due to factors like creep, shrinkage, and steel relaxation. Predicting these phenomena accurately at the design phase is a difficult task, often leading to underestimation of their impact. Particularly in bridges constructed using a balanced cantilever scheme and cast-in-place concrete, the aging process and the timing of load application can influence the time-dependent behavior of the structure. The combination of these effects can result in significant vertical displacements and serviceability issues that necessitate careful consideration. The Italian Bridge Guidelines introduced specific evaluations for post-tensioned concrete bridges, which often require the support of FE models for accurate safety evaluation. The paper reports the investigations carried out on a very challenging post-tensioned concrete box girder bridge with vertically prestressed internal joints. The main objective is to calibrate a predictive FE model of the bridge by integrating information from design reports and drawings, static and dynamic non-destructive experimental tests as well as onsite inspections and digital surveys to characterize the presence of defects. The data obtained from the test campaign are utilized to build an accurate model, which is further calibrated to become an actual digital twin of the real structure employing ambient vibration tests (AVT) to identify the dynamic behavior of the structure. The digital twin thus obtained will serve as a tool for performing reliability analyses and predicting future serviceability or collapse issues. © 2024 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 Scientific Board Members Keywords: post tensioned bridges; digital twin; structural health monitoring; concrete creep; Operational Modal Analysis; numerical simulations. © 2024 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 Scientific Board Members

* Corresponding author. Tel.: +39 3275490524. E-mail address: francesco.mariani6@studenti.unipg.it * Corresponding author. Tel.: +39 3275490524. E-mail address: francesco.mariani6@studenti.unipg.it

2452-3216 © 2024 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 Scientific Board Member s 2452-3216 © 2024 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 Scientific Board Member s

2452-3216 © 2024 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 Scientific Board Members 10.1016/j.prostr.2024.09.128