PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 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 64 (2024) 228–237

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures The dynamic analysis of the Troja footbridge – the analysis of the possibility of the early warning before the collapse Pavel Ryjáček a, * , Vladimír Příbramský a , Alexey Tretyakov a , Tomáš Plachý a SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures The dynamic analysis of the Troja footbridge – the analysis of the possibility of the early warning before the collapse Pavel Ryjáček a, * , Vladimír Příbramský a , Alexey Tretyakov a , Tomáš Plachý a Abstract The subject of this paper is to summarize the results of the analysis of the Troja footbridge collapse. The analysis included the remains inspection, creation of the numerical models, and analysis of the measurement, done on the bridge. The analysis included the impact of variable influences, including the defect of the tendons. Based on variable methods, the conclusions are given, if the failure could have been detected by used methods. © 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: Bridge; Collapse, Modal analysis, Monitoring; Damage detection 1. The description of the bridge The footbridge from 1984 carried pedestrian traffic across the Vltava River in Prague. The superstructure consisted of a stressed ribbon bridge made up of prefabricated segments 3.80 m wide and 3.0 m long, supported by cables, see Fig. 1a. The internal supports consist of a wall pier used to support the cables. The abutments were monolithic and acted as anchor blocks. The length of the bridge was 261.10 m, while the spans were 85.50 m + 96.00 m + 67.50 m. On Saturday, 2 December 2017, the footbridge collapsed and four people were injured, see Fig. 1b. Abstract The subject of this paper is to summarize the results of the analysis of the Troja footbridge collapse. The analysis included the remains inspection, creation of the numerical models, and analysis of the measurement, done on the bridge. The analysis included the impact of variable influences, including the defect of the tendons. Based on variable methods, the conclusions are given, if the failure could have been detected by used methods. © 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: Bridge; Collapse, Modal analysis, Monitoring; Damage detection 1. The description of the bridge The footbridge from 1984 carried pedestrian traffic across the Vltava River in Prague. The superstructure consisted of a stressed ribbon bridge made up of prefabricated segments 3.80 m wide and 3.0 m long, supported by cables, see Fig. 1a. The internal supports consist of a wall pier used to support the cables. The abutments were monolithic and acted as anchor blocks. The length of the bridge was 261.10 m, while the spans were 85.50 m + 96.00 m + 67.50 m. On Saturday, 2 December 2017, the footbridge collapsed and four people were injured, see Fig. 1b. © 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 a Faculty of Civil Engineering, CTU in Prague, Thakurova 7, 16629 Prague, Czech Republic a Faculty of Civil Engineering, CTU in Prague, Thakurova 7, 16629 Prague, Czech Republic

* Corresponding author. Tel.: +420 602 250 860 E-mail address: pavel.ryjacek@fsv.cvut.cz * Corresponding author. Tel.: +420 602 250 860 E-mail address: pavel.ryjacek@fsv.cvut.cz

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

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