75504 Magazine of Civil Engineering Magazine of Civil Engineering 2712-8172 10 10.34910/MCE.142.10 Monitoring and reliability assessment of a caisson gate frame in operational conditions Monitoring and reliability assessment of a caisson gate frame in operational conditions 0000-0001-8650-2375 55101174500 Sharapov Dmitry sharapov.dm@gmail.com 0000-0002-6877-8420 57204916380 B-6662-2019 Kozinetc Galina galina4410@yandex.ru Kozinetc Pavel pavelkozinetc@yandex.ru Peter the Great St. Petersburg Polytechnic University Peter the Great Saint Petersburg Polytechnic University 06 04 2026 19 2 142 14210 14210

The article explores the comprehensive stress-strain state, reliability assessment, and monitoring of the caisson frame of the S-1 Ship Passage Structure, part of the St. Petersburg Flood Protection Complex. The relevance of this study lies in the uniqueness of the structure, which is unique in the country in terms of its length, as well as the complex and dynamic operating conditions in the Neva Bay. The structure is subject to a variety of factors, including variable hydrostatic pressure, ice loads, and temperature deformations, which shape the stress and strain patterns in the load-bearing elements. Particular attention is paid to the presence of initial residual deformations in the frame, recorded during in-kind inspection, which impact the performance of the structure. The study methodology is based on the finite element method. A detailed finite element model was developed that takes into account the actual geometry of the structure, the physical and mechanical properties of the materials, and the actual initial deformations. A series of calculations was conducted for a set of key operational scenarios: the caisson gate in wet and dry dock, initial moment of movement, and various temperature conditions. For each case, stresses, displacements, and reactions in the support hinge were analyzed. The calculation results showed that local and overall stresses in the frame do not exceed permissible values. Similarly, forces in the support hinge remain below the ultimate load-bearing capacity. However, deformation analysis revealed large deflections, which may be due to installation errors. Large deflections are observed in areas 45-95 meters from the support hinge. Based on the analysis of stress and deformation fields, critical areas of the structure most susceptible to loads and deformations were identified. Recommendations for the placement of vibration, deformation, and strain gauge sensors within the monitoring system were developed for these areas.

 Caisson gate stress-strain state FEM structural monitoring reliability protective structure complex residual deformations control and measuring apparatus References Ryabchuk, D., Zhamoida, V., Orlova, M., Sergeev, A., Bublichenko, J., Bublichenko, A., Sukhacheva, L. Neva Bay: A Technogenic Lagoon of the Eastern Gulf of Finland (Baltic Sea). The Diversity of Russian Estuaries and Lagoons Exposed to Human Influence. Estuaries of the World. Springer. Cham, 2017. Pp. 191–221. DOI: 10.1007/978-3-319-43392-9_7 Prishchepenko, D.V., Ryabchuk, D.V., Zhamoida, V.A., Sergeev, A.Y., Leontev, F.A., Grigoriev, A.G., Neevin, I.A., Budanov, L.M., Kovaleva, O.A. Main trends and results of 300-years anthropogenic impact on the geological environment and ecosystem of the Eastern Gulf of Finland. Continental Shelf Research. 2023. 265. Article no. 105058. DOI: 10.1016/j.csr.2023.105058 Dolukhanov, P.M., Subetto, D.A., Arslanov, K.A., Davydova, N.N., Zaitseva, G.I., Djinoridze, E.N., Kuznetsov, D.D., Ludikova, A.V., Sapelko, T.V., Savelieva, L.A. The Baltic Sea and Ladoga Lake transgressions and early human migrations in North-western Russia. Quaternary International. 2009. 203(1–2). Pp. 33–51. DOI: 10.1016/j.quaint.2008.04.021 Andrén, T., Björck, S., Andrén, E., Conley, D., Zillén, L., Anjar, J. The Development of the Baltic Sea Basin During the Last 130 ka. The Baltic Sea Basin. Central and Eastern European Development Studies (CEEDES). Springer. Berlin, Heidelberg, 2011. Pp. 75–97. DOI: 10.1007/978-3-642-17220-5_4 Ludikova, A.V., Subetto, D.A., Kuznetsov, D.D., Orlov, A.V., Shatalova, A.E. New Diatom and Sedimentary Data Confirm the Existence of the Northern Paleo-Outlet from Lake Ladoga to the Baltic Sea. Quaternary. 2024. 7(3). Article no. 31. DOI: 10.3390/quat7030031 Chusov, A., Shilin, M., Gogoberidze, G., Bobylev, N., Ershova, A., Lednova, J. (2020). Long-term monitoring of the dredged material deposit sites in the Eastern Gulf of Finland. E3S Web of Conferences. 164. Article no. 01010. DOI: 10.1051/e3sconf/202016401010 Martyanov, S., Ryabchenko, V. Bottom sediment resuspension in the easternmost Gulf of Finland in the Baltic Sea: A case study based on three–dimensional modeling. Continental Shelf Research. 2016. 117. Pp. 126–137. DOI: 10.1016/j.csr.2016.02.011 Popov, S.K., Lobov, A.L. Hydrodynamic modeling of floods in Saint Petersburg considering the operating dam. Russian Meteorology and Hydrology. 2017. 42. Pp. 267–274. DOI: 10.3103/S1068373917040070 Sokolov, A., Chubarenko, B. Case-Study Modelling Analysis of Hydrodynamics in the Nearshore of the Baltic Sea Forced by Extreme Along-shore Wind in the Case of a Cross-shore Obstacle. Archives of Hydro-Engineering and Environmental Mechanics. 2018. 65(3). Pp. 163–176. DOI: 10.1515/heem-2018-0011 Ryabchenko, V., Dvornikov, A., Haapala, J., Myrberg, K. Modelling ice conditions in the easternmost Gulf of Finland in the Baltic Sea. Continental Shelf Research. 2010. 30(13). Pp. 1458–1471. DOI: 10.1016/j.csr.2010.05.006 Andreev, P.N., Dvornikov, A.Y., Ryabchenko, V.A., Tsepelev, V.Y., Smirnov, K.G. Simulation of storm surges in the Neva Bay on the basis of a three-dimensional model of circulation in the conditions of maneuvering by gates of the flood protection barrier. Fundamental and Applied Hydrophysics. 2013. 6 (4). Pp. 23–31. Kozinetc, G.L., Badenko, V.L., Sharapov, D.A., Shonina, E.V. Method of integrated consideration of factors for calculation of anchor system of pontoons. Magazine of Civil Engineering. 2024. 17(7). Article no. 13108. DOI: 10.34910/MCE.131.8 Kozinetc, G.L., Badenko, V.L., Sharapov, D.A., Shonina, E.V. Loads on hydraulic engineering and berthing structures of the coastal zone of the Neva Bay. Magazine of Civil Engineering. 2024. 17(8). Article no. 13206. DOI: 10.34910/MCE.132.6 Bolshev, A.S., Klimovich, V.I., Chernetsov, V.A. Issledovaniye i dorabotka plavuchego zatvora sudopropusknogo sooruzheniya S-1 Kompleksa zashchity Sankt-Peterburga ot navodneniy [Research and refinement of the floating gate of the S-1 navigation passage of the St. Petersburg Flood Protection Complex]. Izvestiya VNIIG im. B. Ye. Vedeneyeva. 2012. Vol. 266. (rus) Bolshev, A.S., Klimovich, V.I., Petukhov, Ye.P., Chernetsov, V.A. Issledovaniya gidrodinamicheskikh vozdeystviy i dorabotka sistemy myagkoy posadki batoportov plavuchego zatvora S-1 Kompleksa zashchitnykh sooruzheniy Sankt-Peterburga ot navodneniy [Research of hydrodynamic effects and refinement of the soft landing system of the caisson gates of the S-1 floating gate of the St. Petersburg flood protection complex]. Izvestiya VNIIG im. B. Ye. Vedeneyeva, 2013. Vol. 268. Pp. 85-110. (rus) Mishchenko, S.M. Otsenka nadezhnosti plavuchego zatvora sudopropusknogo sooruzheniya v sostave kompleksa zashchity Sankt-Peterburga ot navodneniy [Assessment of the reliability of a floating gate of a navigation facility as part of the flood protection complex for St. Petersburg]. Izvestiya VNIIG im. B. Ye. Vedeneyeva. 1997. Vol. 233. (rus) Sharapov, D. Ice adhesion to hydrotechnical structures. E3S Web of Conferences. EDP Sciences: EDP Sciences, 2023. 03006. DOI 10.1051/e3sconf/202343103006. Sharapov, D. Ice adhesion to hydrotechnical structures. E3S Web of Conferences. 2023. 431. Article no. 03006. DOI: 10.1051/e3sconf/202343103006 Biplov A., Ashrut A., Niraj J., Kausal K.C. Analysis-and-optimization-of-hydraulic-gate. Kathmandu University, 2021. 22 p. Vasilevskiy, A.G. Sistema nablyudeniy za sostoyaniyem gidrotekhnicheskikh sooruzheniy kompleksa zashchitnykh sooruzheniy g. Sankt-Peterburga ot navodneniy [A system for monitoring the condition of hydraulic structures of the St. Petersburg flood protection complex]. Gidrotekhnika. 2010. Vol. 1. (rus) Chen, S., Xing, J., Yang, L., Zhang, H., Luan, Y., Chen, H., Liu, H. Numerical modelling of new flap-gate type breakwater in regular and solitary waves using one-fluid formulation. Ocean Engineering. 2021. Vol. 240. 109967. DOI: 10.1016/j.oceaneng.2021.109967. Esteban, M.D., Couñago, B., López-Gutiérrez, J.S., Negro, V., Vellisco, F. Gravity based support structures for offshore wind turbine generators: Review of the installation process. Ocean Engineering. 2015. Vol. 110. Part A. Pp. 281–291. DOI: 10.1016/j.oceaneng.2015.10.033. Kusakabe, O., Foundation studies with physical modeling. Soils and Foundations. 2024. 64(6). 101521. DOI: 10.1016/j.sandf.2024.101521. Daniel, R., Paulus, T. Chapter 3 - Structural Types of Hydraulic Gates. Lock Gates and Other Closures in Hydraulic Projects. Butterworth-Heinemann, 2019. Pp. 35–282. DOI: 10.1016/B978-0-12-809264-4.00003-3. Pan, S., Zhang, H., Geng, J., Zhao, X. Hydrodynamic behavior of an offshore OWC power station under dam-break flows: Numerical and experimental study. Journal of Fluids and Structures. 2025. 139. 104426. DOI: 10.1016/j.jfluidstructs.2025.104426. Brownjohn, J.M.W., Koo, K.-Y., Battista, N. 1 - Sensing solutions for assessing and monitoring of bridges. Sensor Technologies for Civil Infrastructures (Second Edition), Woodhead Publishing, 2022. Pp. 3–30. DOI: 10.1016/B978-0-08-102706-6.00006-4. Gordan, M., Sabbagh-Yazdi, S., Ismail, Z., Ghaedi, K., Carroll, P., McCrum, D., Samali, B. State-of-the-art review on advancements of data mining in structural health monitoring. Measurement. 2022. 193. 110939. DOI: 10.1016/j.measurement.2022.110939. Burrello, A., Zara, G., Benini, L., Brunelli, D., Macii, E., Poncino, M., Pagliari, D.J. Traffic Load Estimation from Structural Health Monitoring sensors using supervised learning. Sustainable Computing: Informatics and Systems. 2022. 35. 100704. DOI: 10.1016/j.suscom.2022.100704. Franklin, J.A. The monitoring of structures in rock. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. 1977. 14(4). Pp. 163–192. DOI: 10.1016/0148-9062(77)90947-0.