Influence of Damages in the Compressed Zone on Bearing Capacity of Reinforced Concrete Beams

Lobodanov, Maksym; Vegera, Pavlo; Khmil, Roman; Blikharskyy, Zinoviy

doi:10.1007/978-3-030-57340-9_32

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…Defects occur in all structures during operation, and reduce the bearing capacity of RC structures. Most common are concrete defects in reinforced concrete beams [4] or columns [5]. The defects described in these works lead to a significant decrease in the bearing capacity of such structures.…”

Section: Analysis Of Previous Researchmentioning

confidence: 99%

A Calculation Model for Determining the Bearing Capacity of Strengthened Reinforced Concrete Beams on the Shear

et al. 2023

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This article presents research on the bearing capacity and methods of calculating reinforced concrete beams on the shear without internal shear reinforcement, which are strengthened with a composite FRCM system. The test samples were divided into two series: the first series—control, in which the variable parameter was the shear span (a/d = 2, a/d = 1.5, and a/d = 1); and the second series—reinforced by the FRCM system, without load, and strengthened at different load levels. The method of calculating experimental beams was tested according to the current code and data from the fib report. In this article, recommendations for determining the angle of inclined struts θ, the coefficient of the concrete shear strength CRd,c, and the coefficient of the load level at which strengthening is performed are proposed. The calculation with the these recommendations showed a good convergence of experimental and theoretical data in the 16–29% range, which is a much higher convergence than the calculation without these recommendations.

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Section: Analysis Of Previous Researchmentioning

confidence: 99%

A Calculation Model for Determining the Bearing Capacity of Strengthened Reinforced Concrete Beams on the Shear

et al. 2023

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“…The article (Vegera et al, 2021) reports the improved and verified procedure for calculating reinforced concrete beams affected by damage to stretched reinforcement when loaded. The proposed calculation provides a new approach that makes it possible to determine the residual bearing capacity of structures more accurately and increases the safety of their operation.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The proposed calculation provides a new approach that makes it possible to determine the residual bearing capacity of structures more accurately and increases the safety of their operation. Author (Lobodanov et al, 2021) presents the results of reinforced concrete beams damaged at the compressed fiber. That provides an overview of the influence of different types of damages in the compressed zone on the bearing capacity of reinforced concrete beams.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of defective reinforced concrete beams with obtained damage of compressed area of concrete

Blikharskyy

Lobodanov

Vegera

2022

Production Engineering Archives

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In the building industry, it is a frequent cause of damage to elements at different stages: during transportation, operation, installation, etc. Since replacing an element is not always possible due to various circumstances, it entails significant financial losses, logistics, and others. For this reason, the expediency of studying the effect of damage on the bearing capacity of reinforced concrete elements is growing. This effect is dependent on its type and has significant variability. In the case of the combination of the defect and damage in reinforced concrete elements, the complexity of the research of this element increases significantly. In this article is discussed: a review of damaged reinforced concrete elements; researching the influence of the damage and additional factors on the element; developed testing methodology for bending reinforced concrete elements with damage to concrete in a compressed zone with insufficient reinforcement, when performing damage to the action of the load and during the action of the load, is presented; the influence on the deformability and bearing capacity of the variability of damage on the sample with insufficient reinforcement is reflected, taking into account the factor of change in the load at which the damage is performed; a comparison is made of the dependence of the change in the actual height of the compressed zone on the change in the load on the elements; implementation of conclusions on the result of the study.

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“…Structural characteristics such as the growth of concrete cracks and the rate of dete-rioration of bending strength are considered a stochastic process for modeling distribution throughout the lifetime of operation. On the other hand, it is necessary to take into consideration the occurrence and development of defects in the concrete of the structure [29], which also reduces the bearing capacity of structures and can be critical.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development methodology of determinating residual carrying capacity of reinforced concrete beams with damages tensile reinforcement which occurred during loading

Vegera

Vashkevych

Blikharskyy

et al. 2021

EEJET

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This paper reports the improved and verified procedure for calculating reinforced concrete beams affected by damage to stretched reinforcement when loaded. The main results from testing the reinforced concrete beams with damage in the stretched zone in the form of one hole in the reinforcement in the middle of the beam are given. The variable parameter of the study was the level of load resulting in the damage. It acquired values of 0, 30 %, 50 %, 70 % of the bearing capacity of control undamaged samples. Overall, the results of testing 12 samples are given. A new procedure has been proposed for taking into consideration changes in the mechanical characteristics of stretched reinforcement arising from its damage. This makes it possible to more accurately establish the bearing capacity of reinforced concrete bended elements affected by damage to their reinforcement during operation. The analysis of the calculation, compared with experimental quantities, led to a conclusion that the strain model could determine when the bearing capacity of reinforced concrete beams without damage and with damage to working reinforcement is exhausted. Based on the improved algorithm, the principle of using a strain model was proposed to establish when the bearing capacity of damaged samples, taking into consideration the effect of the load level, is exhausted. The theoretical estimation, considering when the bearing capacity is exhausted, showed results that are 3...21 % less than the experimental values, which ensures reliability of calculation of such structures. The proposed calculation provides a new approach to determining the bearing capacity of reinforced concrete beams damaged during operation. That, in turn, makes it possible to more accurately determine the residual bearing capacity of structures and increases the safety of their operation.

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Influence of Damages in the Compressed Zone on Bearing Capacity of Reinforced Concrete Beams

Cited by 10 publications

References 25 publications

A Calculation Model for Determining the Bearing Capacity of Strengthened Reinforced Concrete Beams on the Shear

A Calculation Model for Determining the Bearing Capacity of Strengthened Reinforced Concrete Beams on the Shear

Investigation of defective reinforced concrete beams with obtained damage of compressed area of concrete

Development methodology of determinating residual carrying capacity of reinforced concrete beams with damages tensile reinforcement which occurred during loading

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