Research of RC columns strengthened by carbon FRP under loading

Blikharskyy, Yaroslav; Khmil, Roman; Blikharskyy, Zinoviy

doi:10.1051/matecconf/201817404017

Cited by 27 publications

(6 citation statements)

References 6 publications

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“…Traditional method of strengthening, using reinforced concrete jacketing, is needed longterm assembling, significant increasing dimensions and bigger self-weight [Krainskyi P. et al 2018a.]. Strengthening with CFRP has good adhesion and collaboration between main and adding elements but materials are faster jacketing [Blikharskyy Y. et al 2018], with values close to strengthening with RC [Krainskyi P. et al 2018b.]. Resistance to corrosion, high tensile strength, low weight, easiness and rapidity of application are such characteristics that have contributed to the spread of the strengthening technique characterized by bonding of carbon fibers reinforced polymer (CFRP).…”

Section: Introductionmentioning

confidence: 99%

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Vegera

Khmil

Vashkevych

et al. 2019

Quality Production Improvement - QPI

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Main parameters, which characterize shear strength, are crack distribution, width of diagonal crack opening and angle of inclined crack. There are in this article, comparison crack resistant of testing reinforced concrete (RC) beams on the shear with such variable parameters like presence or absence internal reinforcement, different shear span, and presence or absence external composite reinforcement. Shear span (relative span to effective depth ratio) was acquired the following values: a/d=2, 1.5, 1. For internal reinforcement, rebar’s A240C with diameter 8 mm and steps 100 mm was chosen. The composite FRCM system was like external reinforcement with three stripe of composite fabric with width 70 mm and step 100 mm. Eight RC beams were tested. After testing, we discovered that the most influenced on the serviceability capacity was shear span. Internal transverse reinforcing increased shear strength on the same level and it was independent from shear span and other factors. Only quantity of reinforcing determine level of increasing shear capacity. FRCM system is efficient strengthening system, which significant increase shear crack resistant for RC beams. External FRCM reinforcing increase shear crack resistance on the same percentage and independent from presence or absence internal reinforcement.

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Section: Introductionmentioning

confidence: 99%

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Vegera

Khmil

Vashkevych

et al. 2019

Quality Production Improvement - QPI

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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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“…In particular the investigations of special mineral additives like zeolite should be noted, which improve durability and corrosion resistance of cements for concrete (Sobol et al, 2014). Many factors cause necessity for the repairing or strengthening (Blikharskyy et al, 2018;Khmil et al, 2018;Krainskyi et al, 2018a;Abu-Tair et al, 1996;Vegera at al., 2018) buildings and constructions. Often it is damages (Kos et al, 2017) or corrosion (Selejdak et al, 2018;Lipiński, 2017;Pliszka and Radek, 2017) of construction obtained during its lifetime from negative environment influence.…”

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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Research of RC columns strengthened by carbon FRP under loading

Cited by 27 publications

References 6 publications

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

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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