Effectivenes of Strengthening Loaded RC Beams with FRCM System

Blikharskyy, Zinoviy; Brózda, Kinga; Selejdak, Jacek

doi:10.2478/ace-2018-0025

Cited by 19 publications

(9 citation statements)

References 7 publications

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“…2. Its regression equation and correlation coefficient r is presented at (5). (5) Rotary bending fatigue strength high-purity structural steel melted in electric arc furnace after hardened with austenitized at temperature 880 0 C and tempered at 200°C as relationship α taking into account the distance between the impurities present in the tested steel d ̅ and the arithmetic mean distance between non-metallic inclusion λ is presented at Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The dynamic progress in manufacturing technology and available research methods recorded in recent years, along with the constantly growing demand for machines and technical devices characterized by high reliability, constitute the premise for conducting research on fatigue strength of construction materials [1][2][3][4][5][6]. Industrially produced steels contain in their chemical composition, in addition to alloying additives (which include Si, Mn, Cr, Mo, V, W, B and others), blends and impurities (such as S, P, O i inne) and other impurities introduced into the alloy as a result of Technological process (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…1 Rotational bending fatigue strength of hardened and tempered steel at 200°C as a function of diameter and distance between inclusions zgo (200) = 2311.8 • α + 153.69, r=0.9566(4) Rotary bending fatigue strength high-purity structural steel melted in electric arc furnace after hardened with austenitized at temperature 880 0 C and tempered at 200°C as a relationship α taking into account the distance between the impurities present in the tested steel d ̅ and the arithmetic mean distance between non-metallic inclusion λ is presented at Fig.2. Its regression equation and correlation coefficient r is presented at(5).…”

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confidence: 99%

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Influence of Impurity Morphology on the Fatigue Strength of High-Purity Structural Steel Melted in an Electric Furnace

Lipiński¹

2023

Manufacturing Technology

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A modern user requires low operating costs, but also reliability from machines and technical devices. Reliability during the service life depends on the quality of construction solutions, but also largely on the quality, properties and adaptation to the working conditions used in the construction of construction materials. During the operation of technical objects, their a highly predictable wear occurs. The problem is the phenomena of premature wear and damage of elements. The causes of failure of technical facilities are usually complex and depend on many factors. They can include the human factor and the one related to the quality, selection, production and technological processes of the materials used in the construction of the facility. In real technical facilities, many premature failures are caused by material fatigue, which is related to the imperfection of the material and the morphology of non-metallic inclusions. The paper presents the change in fatigue strength for rotational bending of highpurity structural steel. In order to diversify the matrix of inclusions, the steel was hardened and tempered at temperatures from 200C to 600C. The influence of impurity diameter and arithmetic average impurities space on the fatigue strength of industrially produced steel was investigated.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Influence of Impurity Morphology on the Fatigue Strength of High-Purity Structural Steel Melted in an Electric Furnace

Lipiński¹

2023

Manufacturing Technology

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“…Analyses of the causes of the premature failure of machine parts often indicate that material fatigue was the cause [ 15 , 16 , 17 ]. The properties of the material are due to its microstructure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Non-Metallic Inclusions on Bending Fatigue Strength of High-Quality Carbon Constructional Steel Heated in an Industrial Electric Arc Furnace

Lipiński

2022

Materials

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Non-metallic inclusions are one of the many factors influencing the strength of materials operating under variable loads. Their influence on the strength of the material depends not only on the morphology of the impurities themselves, but it is also closely related to the microstructure of the material. This microstructure is the matrix for non-metallic inclusions. This article discusses the results of a study investigating the effect of non-metallic inclusions on the fatigue strength of structural steel during rotary bending. The study was performed at 12 heats produced in an industrial plant’s 140-ton electric furnaces. Six heats were desulphurised, and six were refined with argon. This paper presents the bending fatigue strength of steel hardened and tempered at different temperatures, subject to the relative volume of inclusions. This paper also presents the dimensional structure of non-metallic inclusions divided by different two technologies. The research shows that the main fraction of non-metallic inclusions is Al2O3; the most numerous were impurities with a diameter of less than 2 µm; argon refining does not affect the proportion of non-metallic inclusions of large dimensions (with a diameter of over 15 µm); the influence of non-metallic inclusions on the strength of the steel is also related to the microstructure of the steel constituting the matrix of inclusions.

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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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Effectivenes of Strengthening Loaded RC Beams with FRCM System

Cited by 19 publications

References 7 publications

Influence of Impurity Morphology on the Fatigue Strength of High-Purity Structural Steel Melted in an Electric Furnace

Influence of Impurity Morphology on the Fatigue Strength of High-Purity Structural Steel Melted in an Electric Furnace

Influence of Non-Metallic Inclusions on Bending Fatigue Strength of High-Quality Carbon Constructional Steel Heated in an Industrial Electric Arc Furnace

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

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