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DOI: 10.15862/18SATS425 (https://doi.org/10.15862/18SATS425)

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Rybakov S.V. Computational Justification of the Hybrid Bridge Superstructure Joint Design. Part 1. Russian Journal of Transport Engineering. 2025; 12(4). Available at: https://t-s.today/PDF/18SATS425.pdf (in Russian). DOI: 10.15862/18SATS425

Computational Justification of the Hybrid Bridge Superstructure Joint Design. Part 1

Rybakov Sergey Viktorovich
Russian University of Transport, Moscow, Russia
E-mail: Rybakov.sv@bk.ru
ORCID: https://orcid.org/0009-0000-0810-7994
RSCI: https://elibrary.ru/author_profile.asp?id=1178306

Abstract. This article presents the first part of a computational justification for the design of a joint between a monolithic reinforced concrete slab and the main beam of a polymer composite superstructure. The study included an analysis of the existing method for calculating joints in composite superstructures according to Section 9 of SP 35.13330.2011 «Bridges and Pipes», as well as numerical modeling using the finite element method. The anisotropy of the composite material’s properties is numerically accounted for by specifying its physical and mechanical properties, and structurally, through a mechanism for partially converting the concrete shear force relative to the main beam’s upper composite sheet into frictional force between the contacting surfaces of the washers and the main beam’s upper sheet, taking into account the stress state of flexible supports in concrete.

The strength of the bolted joint is limited by the ability of the polymer binder to withstand local compression from the pressure under the washers. Standard flat washers, when applied to a high-strength bolt body with the design pretension force, cause matrix failure along the hole edge. Therefore, a washer design was developed and numerically substantiated that more effectively redistributes normal forces across the contact surface with the composite. When designing the connecting unit, it was taken into account that longitudinal fibers interrupted by the hole are disabled. Based on the results of a study of the stress state in longitudinally compressed polymer composite materials in the area of stress concentrators in the form of round holes, recommendations were formulated for the design of the composite package composition, as well as for utilizing the stress redistribution effect when the hole is tightly filled with the bolt body.

Keywords: polymer composite materials; hybrid superstructures; connecting device; superstructure stop; polymer-composite bridges; composite application issues; superstructure made of polymer composite materials; computational justification; finite element modeling

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