PSI - Issue 81

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ScienceDirect

Procedia Structural Integrity 81 (2026) 255–259

© 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers Keywords: culvert pipe; strengthening; sleeving; reinforcing cage; experimental studies; deformations; load-bearing capacity. 1. Introduction Transport infrastructure is a fundamental component of the modern economy, as it ensures the continuous movement of transport flows and the stability of logistics networks (Postranskyy et al., 2020). Among the most widespread structures on highways are culvert pipes, which perform the key function of draining surface and groundwater and ensuring the durability of the roadway (Machelski, 2016; Parneta et al., 2024). A major segment of these structures is made of reinforced concrete, that is known as a material of high strength and durability (Dvorkin et al., 2021; Kovalchuk et al., 2022). However, long-term operation under the influence of various loads, constant temperature changes, and exposure to moisture deteriorates their physical properties and service life (Barr et al., 2005; Sydor et al., 2024). While operating, various damages occur in culverts, such as cracks, concrete destruction, reinforcement corrosion, and loss of the protective cover layer. These defects lead to a deterioration in load-bearing capacity and increase the risk of deformation and failure (Korniychuck et al., 2024; Zhang et al., 2020). As a consequence, the capacity and reliability of transport infrastructure decrease, which may lead to significant operational problems or even complete traffic disruption (Boikiv et al., 2023). The technical condition of concrete structures is influenced not only by service loads but also by a number of additional factors, including Abstract The results of experimental testing of a reinforced concrete culvert strengthened by a sleeving (lining) method with additional reinforcement of the inter-pipe space using a reinforcing steel cage are presented. An evaluation assessment of the stress – strain state was conducted under applied force introduction. Authors determined that the additional reinforcement enhances more optimized redistribution of stress levels between the internal liner and the external shell. As a result, stability and plasticity of the structure were enhanced. The load of the ultimate failure was 16.85kN. The upper limit of deformations at the beginning of cracking was 5.73 mm. The complete failure attained 6.72mm. The obtained results confirm the feasibility of using a reinforcing cage in the sleeving process as an effective means of increasing the load-bearing capacity and durability of reinforced concrete pipes, which is of practical significance for the rehabilitation and repair of road infrastructure. VIII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2025) Experimental Studies of the Influence of Reinforcement on the Deformability of Strengthened Reinforced Concrete Culvert Pipe Roman Rybak*, Vitalii Kovalchuk, Bohdan Parneta, Mariana Parneta Lviv Polytechnic National University, S. Bandery str. 12, Lviv, 79013, Ukraine

* Corresponding author. Tel. +380-96-212-6776 E-mail address: roman.t.rybak@lpnu.ua

2452-3216 © 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers 10.1016/j.prostr.2026.03.044