PSI - Issue 64

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 2101–2108

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Real-Time evaluation of bridge girder deflection under heavy vehicles Mariniello Giulio a, *, Coluccino Daniele a , Bilotta Antonio a and Asprone Domenico a a Department of Structures for Engineering and Architecture, University of Naples Federico II, Via Claudio, 21, 80125 Naples Abstract Modern Anomaly Detection techniques enable the detection of structure damage from data recorded by structural monitoring systems. One of the most significant quantities to be monitored is beam deflection, which, however, is difficult to measure directly. This research focuses on evaluating bridge girder deflection using laser sensors. The validation of the system is conducted on the lateral span of a prestressed precast concrete deck which is characterized by high stiffness and behaves displacements below the millimeter in operational conditions. Monitoring displacements in such a complex scenario is a challenging objective. The study demonstrates the effectiveness of measuring deflection with vertical sensors and, when necessary, with sub-vertical sensors in cases of obstacles. The results indicate a good correlation between the readings of the vertical and diagonal sensors, despite increased ambient noise in the diagonal measurements. © 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 SMAR 2024 Organizers Keywords: Structural Health Monitoring, Bridge Engineering, beam deflection. 1. Introduction Bridges have made significant contributions to social and economic development. However, they have also brought inevitable safety issues, such as material deterioration due to corrosion, structural damage [Scuro et al. (2018), Sun L. et al. (2020)]. These problems can arise from overloads, environmental erosion, and natural disasters, posing a risk to the safety of the structures [Brownjohn (2007), Al-Ali et al. (2024).] Service performance is attributed to structural response in terms of deflections, cracking, and anelastic deformations, so it is crucial to monitor certain © 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 SMAR 2024 Organizers

* Corresponding author. E-mail address: giulio.mariniello@unina.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 SMAR 2024 Organizers

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 SMAR 2024 Organizers 10.1016/j.prostr.2024.09.308