Bearing capacity of RC beams reinforced with high strength rebars and steel plate

Bobalo, Taras; Blikharskyy, Yaroslav; Вашкевич, Р. В.; Volynets, Myhailo

doi:10.1051/matecconf/201823002003

Cited by 25 publications

(6 citation statements)

References 9 publications

(5 reference statements)

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“…Thus, it was found that corrosion of reinforcement occurs in all cracks with an opening over 0.05 mm with the possibility of its amplification, when the opening width increases. By providing structural measures of crack resistance of reinforced concrete structures, it is possible to achieve a crack opening width of 0.05 mm directly before failure [ 18 ], which protects the metal from the inside from corrosion.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Corrosion Fatigue Damages of Rebars under Loading in Time

2021

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Nowadays, a relatively small number of studies concern the study of corrosion processes in reinforced concrete structures under load. Additionally, rather little research has been carried out concerning changes in the stress–strain state parameters of structures under the simultaneous action of aggressive environment and load. This issue requires additional experimental and theoretical investigation. Determination of mechanical properties, fatigue characteristics and susceptibility to corrosion cracking was performed on samples of reinforcing St3GPF steel. The chemical composition of steel was determined by structural analysis. The spectral method for the determination of alloying elements and impurities in steels is based on the excitation of iron atoms and admixtures by electric discharge, decomposition of radiation into a spectrum, followed by its registration on photoplate with the use of electrograph. Experimental tests of samples in an aggressive environment under the action of statically applied tensile force showed that corrosion damage has little effect on the strength characteristics. At the same time, the decrease in area reduction and the decrease in strain were recorded. Additionally, the action of cyclic loads in an aggressive environment leads to a significant reduction in the fatigue limit to values from 20 to 24% of the yield strength of the original samples, which is 2–3 times lower than the fatigue limit of undamaged samples.

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Section: Introduction and Literature Reviewmentioning

confidence: 99%

Corrosion Fatigue Damages of Rebars under Loading in Time

2021

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“…The RC constructions are mostly useful at the world [1][2][3][4][5]. However, there are some disadvantages of this constructions [6][7][8][9][10][11][12]. In this case, are a lot of researching for strengthening this constructions [13], also for improving shear strength.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Crack Resistance and Shear Strength of Single-Span Reinforced Concrete Beams Under a Concentrated Load at a/d = 1

Maksymovych

Krochak

Karkhut

et al. 2020

Lecture Notes in Civil Engineering

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At a stage following the crack development, a reinforced concrete beam has a complex structure that does not correspond to such simple systems as the truss, arch or strutted frame. Therefore, to establish a possible design model for calculating the shear strength, it is necessary to know not only the failure pattern, but also the order of crack nucleation and propagation in the loaded structures. The pattern of nucleation and propagation of diagonal cracks differs significantly from that of vertical cracks, which are the reason for the stretching stress or bending moment. Diagonal cracks can be far more dangerous, as the time interval between the crack nucleation and failure is considerably shorter than for pure bending. The paper discusses the experimental study of diagonal cross-sections of single-span reinforced concrete beams under a concentrated load for a/d = 1. The tested beams had identical characteristics and differed only in the type of transverse reinforcement. The analysis of the experimental data revealed the specifics of nucleation and propagation of diagonal cracks in the zone of impact of the shear force and bending moment. The dynamics of propagation and width of diagonal cracks opening was recorded depending on the load. The effect of different types of transverse reinforcement on the bearing capacity of the beams was established.

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“…This material has found its application in production and in a constructional engineering (Brózda et al, 2017;Mazur, 2016). In structural elements, subjected to compression with bending, compressive stresses are taken by concrete while tensile stresses are transmitted to the rebar (Bobalo et al, 2018;Krainskyi et al, 2018b). At the same time, concrete serves as protection of structures from corrosion and various damages.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of Reinforce Bars in RC Constructions

Blikharskyy

Selejdak

Blikharskyy

et al. 2019

System Safety: Human - Technical Facility - Environment

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In this article presented results of researching corrosion of steel bars in aggressive environment in time under loading. For researching were used special equipment. The experience and research works shown that steel bars in the crack cross-section area can be corrode. With increasing width of crack in re-bars and power of aggressive of environment increased the level of corrosion and decreased time of progress. The level of danger of corrosion in the crack in depend of specialty of steel bars. It is geometry parameters of steel bars and characteristic of corrosive behaviour. The general tendency of the influence of various defects on the strength of steels is widely studied experimentally and theoretically only for geometrically correct stress concentrators. For damages that are irregular in shape, such as corrosion ulcers, significantly less researching in each case must experiment to find their effect on the mechanical properties of steels. In this work the influence of simultaneous action of the aggressive environment and loading on strength of steel re-bars has been described.

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Bearing capacity of RC beams reinforced with high strength rebars and steel plate

Cited by 25 publications

References 9 publications

Corrosion Fatigue Damages of Rebars under Loading in Time

Corrosion Fatigue Damages of Rebars under Loading in Time

Experimental Study of Crack Resistance and Shear Strength of Single-Span Reinforced Concrete Beams Under a Concentrated Load at a/d = 1

Corrosion of Reinforce Bars in RC Constructions

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