Procedure for determining the thermoelastic state of a reinforced concrete bridge beam strengthened with methyl methacrylate

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.238440

Keywords:

bridge reinforcement, reinforced concrete beam, methyl methacrylate reinforcement, temperature field

Abstract

This paper reports the analysis of methods for determining temperature stresses and deformations in bridge structures under the influence of climatic temperature changes in the environment.

A one-dimensional model has been applied to determine the temperature field and thermoelastic state in order to practically estimate the temperature fields and stresses of strengthened beams taking into consideration temperature changes in the environment.

The temperature field distribution has been determined in the vertical direction of a reinforced concrete beam depending on the thickness of the structural reinforcement with methyl methacrylate. It was established that there is a change in the temperature gradient in a contact between the reinforced concrete beam and reinforcement.

The distribution of temperature stresses in the vertical direction of a strengthened reinforced concrete beam has been defined, taking into consideration the thickness of the reinforcement with methyl methacrylate and the value of its elasticity module. It was established that the thickness of the reinforcement does not have a significant impact on increasing stresses while increasing the elasticity module of the structural reinforcement leads to an increase in temperature stresses. The difference in the derived stress values for a beam with methyl methacrylate reinforcement with a thickness of 10 mm and 20 mm, at elasticity module E=15,000 MPa, is up to 3 % at positive and negative temperatures.

It has been found that there is a change in the nature of the distribution of temperature stresses across the height of the beam at the contact surface of the reinforced concrete beam and methyl methacrylate reinforcement. The value of temperature stresses in the beam with methyl methacrylate reinforcement and exposed to the positive and negative ambient temperatures increases by three times.

It was established that the value of temperature stresses is affected by a difference in the temperature of the reinforced concrete beam and reinforcement, as well as the physical and mechanical parameters of the investigated structural materials of the beam and the structural reinforcement with methyl methacrylate

Author Biographies

Vitalii Kovalchuk, Lviv Branch of Dnipro National University of Railway Transport named after Academician V. Lazaryan

Doctor of Technical Sciences, Аssociate Professor

Department of Rolling Stock and Track

Yuliya Sobolevska, Lviv Branch of Dnipro National University of Railway Transport named after Academician V. Lazaryan

PhD, Аssociate Professor

Department of Fundamental Disciplines

Artur Onyshchenko, National Transport University

Doctor of Technical Sciences, Associate Professor

Department of Bridges and Tunnels

Olexandr Fedorenko, Kyivavtodor Municipal Corporation

Deputy General Director for Production Development

Oleksndr Tokin, National Transport University

PhD, Associate Professor

Department of Manufacturing, Repair and Materials Engineering

Andrii Pavliv, Lviv Polytechnic National University

Doctor of Architecture Sciences, Associate Professor

Department of Design and Architecture Fundamentals

Ivan Kravets, Lviv Branch of Dnipro National University of Railway Transport named after Academician V. Lazaryan

Assistant

Department of Fundamental Disciplines

Julia Lesiv, Lviv Branch of Dnipro National University of Railway Transport named after Academician V. Lazaryan

Head of Laboratory

Department of Rolling Stock and Track

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Published

2021-08-31

How to Cite

Kovalchuk, V., Sobolevska, Y., Onyshchenko, A., Fedorenko, O., Tokin, O., Pavliv, A., Kravets, I., & Lesiv, J. (2021). Procedure for determining the thermoelastic state of a reinforced concrete bridge beam strengthened with methyl methacrylate . Eastern-European Journal of Enterprise Technologies, 4(7(112), 26–33. https://doi.org/10.15587/1729-4061.2021.238440

Issue

Vol. 4 No. 7(112) (2021): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2021 Vitalii Kovalchuk, Yuliya Sobolevska, Artur Onyshchenko, Olexandr Fedorenko, Oleksndr Tokin, Andrii Pavliv, Ivan Kravets, Julia Lesiv

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