PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 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 37 (2022) 880–887

© 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 Pedro Miguel Guimaraes Pires Moreira The measurements were performed using IP cameras designed for video surveillance and security applications, capturing the bridge’s surface from above. Rather than preparing the surface with a custom speckle pattern, the DIC processing w as performed using the pattern appearing naturally due to the irregularities on the surface. A 2D DIC test was performed simultaneously with an industrial camera capturing the same section of the bridge from a horizontal position inside a lower floor of the same building. The results from the 3D and 2D tests were in close agreement with each other and with the expected displacement profile. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: digital image correlation; structural monitoring; bridge deflection Abstract Using computer vision methods for monitoring the behaviour of structures in urban environments, especially if it is intended to be a lo ter operation, requires the vision system and the prepara ion of the st ucture to be s t up with minimal disruption to th surroundings and he us of the structure itself. With t is concept n mind, 3D digital image correlation was use to evalua e deflection cause by a static load on a pedestrian bridge, using cameras installed by windows in different floors f an adjacent bui ding. The measurements were performed using IP cameras designed for video surveillance and security applications, capturing the bridge’s fac from abov . Rath r tha preparing the surface with a cust m sp ckle pattern, the DIC rocessing w as pe formed us n the pattern appe ring naturally due to the irregularities on the surface. A 2D DIC tes was p rformed simultaneously with an industrial c mera ca tu the s me secti n of th bridge from a orizontal position inside a low r loor of the sam b i ding. The res lts from th 3D and 2D est were in close agr ement with e ch other nd with the expected displacement profile. © 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 Pedro Miguel Guimara s Pires Moreira Keywords: digital image c rrelation; structural monitoring; bridge deflection ICSI 2021 The 4th International Conference on Structural Integrity Displacement monitoring of a pedestrian bridge using 3D digital image correlation Francisco Barros a *, Susana Aguiar a , Pedro J. Sousa a , António Cachaço a , Paulo J. Tavares a , Pedro M. G. P. Moreira a , D. Ranzal b , N. Cardoso b , N. Fernandes b , R. Fernandes b , R. Henriques b , P.M. Cruz b , A. Cannizzaro b a INEGI, Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering, Campus da FEUP, R. Dr. Roberto Frias 400, 4200-465 Porto, Portugal b Bosch Security Systems SA, EN109 – Zona Industrial de Ovar, 3880-728, Ovar, Portugal Abstract Using computer vision methods for monitoring the behaviour of structures in urban environments, especially if it is intended to be a long term operation, requires the vision system and the preparation of the structure to be set up with minimal disruption to the surroundings and the use of the structure itself. With this concept in mind, 3D digital image correlation was used to evaluate the deflection caused by a static load on a pedestrian bridge, using cameras installed by windows in different floors of an adjacent building. ICSI 2021 The 4th International Conference on Structural Integrity Displacement monitoring of a pedestrian bridge using 3D digital image correlation Francisco Barros a *, Susana Aguiar a , Pedro J. Sousa a , António Cachaço a , Paulo J. Tavares a , Pedro M. G. P. Moreira a , D. Ranzal b , N. Cardoso b , N. Fernandes b , R. Fernandes b , R. Henriques b , P.M. Cruz b , A. Cannizzaro b a INEGI, Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering, Campus da FEUP, R. Dr. Roberto Frias 400, 4200-465 Porto, Portug l b Bosch Security Systems SA, EN109 – Zona Industrial de Ovar, 3880-728, Ovar, Portugal

* Corresponding author. E-mail address: fbarros@inegi.up.pt * Corresponding author. E-mail address: fbarros@inegi.up.pt

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 Pedro Miguel Guimaraes Pires Moreira 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 Pedro Miguel Guimara s Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.02.022