Determining the effect of reinforcing a cement-concrete coating of bridges on the stressed-strained state of structures

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.251189

Keywords:

cement-concrete coating, roadbed, layered structures, composite materials, stressed-strained state

Abstract

This paper reports a study of the cement-concrete coating on bridges using FRP reinforcement. That has made it possible to design optimal structures by selecting the height for reinforcement arrangement in the layers of a roadbed in order to ensure strength characteristics.

An engineering method for calculating a hard roadbed with composite reinforcement has been devised, which makes it possible to take into consideration its work both in a joint package of the structure with a slab and separately – when it exfoliates from the slab of the bridge's span structure. Underlying this research are effort-determining methods, estimation dependences from the theory of bending layered structures, as well as dependences from elasticity theory to assess the strength of materials for a roadbed. The consideration of shear strains when designing slabs has helped establish that the deflections according to the devises method were 1.4 times larger than those in the classical approach.

The method was tested by a numerical experiment, which confirmed the need to use composite reinforcement in the upper layers of a road surface on bridges, which improves its durability by 1.2 times. The results of the numerical experiment indicate that the equivalent stresses in the lower layers of a free-moving roadbed were 2.91 MPa, and, when operating in a joint assembly with a slab, they took a negative value (–0.2 MPa).

Practical application of the devised calculation method makes it possible to determine the refined normal stresses in the layers of a roadbed, taking into consideration the characteristics of structure operation. Owing to this, additional opportunities open up for calculating the roadbeds of bridges whose design utilizes the most common types of span structures in the bridge industry.

Author Biographies

Igor Gameliak, National Transport University

Doctor of Technical Sciences, Professor

Department of Airports

Andrew Dmytrychenko, National Transport University

PhD, Associate Professor

Department of Transport Law and Logistics

Vitalii Tsybulskyi, National Transport University

PhD, Senior Lecturer

Department of Strength of Materials and Engineering Science

Anna Kharchenko, National Transport University

Doctor of Technical Sciences, Associate Professor

Department of Transport Construction and Property Management

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Published

2022-02-28

How to Cite

Gameliak, I., Dmytrychenko, A., Tsybulskyi, V., & Kharchenko, A. (2022). Determining the effect of reinforcing a cement-concrete coating of bridges on the stressed-strained state of structures . Eastern-European Journal of Enterprise Technologies, 1(7(115), 21–31. https://doi.org/10.15587/1729-4061.2022.251189

Issue

Vol. 1 No. 7(115) (2022): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2022 Igor Gameliak, Andrew Dmytrychenko, Vitalii Tsybulskyi, Anna Kharchenko

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