The effect of non-uniform steel bar corrosion on pre-stressed RC members subjected to hysteretic load at the mid-span: experimental study and three-dimensional FEM modeling

Biswas, Rajib Kumar; Iwanami, Mitsuyasu; Chijiwa, Nobuhiro; Saito, Takahiro

doi:10.1007/s43452-023-00705-8

Cited by 5 publications

(5 citation statements)

References 37 publications

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“…RC structural members are expected to efficiently transfer the loads over the expected service life of the structure. Nevertheless, due to several reasons, which include faults in the design section, changes in building occupancy, deleterious agents that lead to rebar corrosion, low-quality materials, and changes in natural conditions, the structural members may not be expected to last the full life cycle [1][2][3][4][5][6][7][8][9]. Therefore, strengthening such structural members is often necessary with minimal functional hindrances and at minimum cost [10].…”

Section: Introductionmentioning

confidence: 99%

“…No Strengthening; 2 Tension Side; 3 Concrete Crushing;4 Rebar Failure; 5 Two Sides;6 Normal Concrete Crushing;7 UHPC Crushing;8 Flexural Crack;9 Compression Side;10 Water Jetting;11 Three Sides;12 Two Points.…”

mentioning

confidence: 99%

“…No Strengthening; 2 Two Sides; 3 Three Sides; 4 Shear;5 Flexure-Shear; 6 Flexure;7 Tension Side; 8 Concrete Chipping;9 One Side; 10 Two Points;11 One Point.…”

mentioning

confidence: 99%

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Flexural and Shear Strengthening of Reinforced-Concrete Beams with Ultra-High-Performance Concrete (UHPC)

Ahmed,

Biswas,

Sen

et al. 2024

Construction Materials

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Ultra-high-performance concrete (UHPC) is considered to be a promising material for the strengthening of damaged reinforced concrete (RC) members due to its high mechanical strength and low permeability. However, its high material cost, limited code provisions, and scattered material properties limit its wide application. There is a great need to review existing articles and create a database to assist different technical committees for future code provisions on UHPC. This study presents a comprehensive overview focusing on the effect of the UHPC layer on the flexural and shear strengthening of RC beams. From this review, it was evident that (1) different retrofitting configurations have a remarkable effect on the cracking moment compared to the maximum moment in the case of flexural strengthening; (2) the ratios of the shear span and UHPC layer thickness have a notable effect on shear strengthening and the failure mode; and (3) different bonding techniques have insignificant effects on shear strengthening but a positive impact on flexural strengthening. Overall, it can be concluded that three-side strengthening has a higher increment range for flexural (maximum, 81%–120%; cracking, 300%–500%) and shear (maximum, 51%–80%; cracking, 121%–180%) strengthening. From this literature review, an experimental database was established, and different failure modes were identified. Finally, this research highlights current issues with UHPC and recommends some future works.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Flexural and Shear Strengthening of Reinforced-Concrete Beams with Ultra-High-Performance Concrete (UHPC)

Ahmed,

Biswas,

Sen

et al. 2024

Construction Materials

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“…It can be noted that, in the bridge structure, reinforcement in the tension zone is more corrosion prone, since reinforcing bars in the compression zone are covered with the bridge slab and not exposed to the environment. Finally, to predict the flexural response of severely corroded RC beams retrofitted with UHPC layer, a simplified numerical model was presented following the previously developed FE model by the authors [27]. Experimental results from this study were used to validate the FE model.…”

Section: Introductionmentioning

confidence: 99%

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

Biswas,

Saito,

Misawa

et al. 2023

Preprint

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Corrosion of reinforcement bars in reinforced concrete (RC) structures is considered a major concern. This study examines the flexural response of severely corroded RC beams retrofitted with ultra-high performance fiber reinforced concrete (UHPC) layer. UHPC layers were attached to the concrete substrate in four different configurations to investigate whether they could strengthen severely corroded RC beams. To represent carbonation-induced uniform corrosion, artificial corrosion was adopted in this study by replacing the deformed bars with plain bars and reducing the cross-sectional area. The plain steel bars represented about 38% of rebar corrosion. Obtained results revealed that UHPC layers can remarkably enhance the structural performance when it comes to serviceability and ultimate limit state. The test results also revealed that RC beams retrofitted with the UHPC layer might be unable to improve the displacement capacity of the corroded RC beam owing to bond deterioration between the concrete and embedded rebars and reduced cross-sectional area. Finally, a simplified numerical model was developed in this study and validated with the experimental results.

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“…However, in real structures, not every part of the structure deteriorates even though it is of the same member and under the same condition [15,50,[66][67][68][69]. Similarly, sections of the members and reinforcing bars corrode unevenly [51,70].…”

Section: Introductionmentioning

confidence: 99%

An Assessment of the Structural Performance of Rebar-Corroded Reinforced Concrete Beam Members

Kim,

Yang,

Noguchi

et al. 2023

Applied Sciences

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This paper aims to determine the effects of local corrosion at three different corrosion areas, the (1) entire area, (2) the constant moment area, and (3) the constant shear area, on the flexural performance of RC beams. To analyze this, an experimental study was carried out to prepare two series of RC beams (200 × 300 × 2800 mm) created with three different degrees of corrosion, inducing local rebar corrosion. Furthermore, two series of experimental tests were conducted under different loading types: monotonic and cyclic loading. It was observed that the strength capacity reduction grew in the RC specimens with induced corrosion in the order of the (1) entire area > (2) the constant moment area > (3) the constant shear area, as the average corrosion rate increased. Our test results further showed that the yield and ultimate strength were kept nearly equivalent to the uncorroded RC specimen, with average corrosion rates of 10% and 15%, respectively. Over these corrosion rates, the yield strength and ultimate strength dropped significantly. Compared to the test results under a monotonic loading condition, the structural capacity under a cyclic loading condition decreased, with a more pronounced tendency for each corrosion case as the corrosion rate increased. Longitudinal cracks developed throughout and adjacent to the corrosion areas as the corrosion rate increased. Thus, we can infer that strength reductions may be strongly influenced by these longitudinal cracks.

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The effect of non-uniform steel bar corrosion on pre-stressed RC members subjected to hysteretic load at the mid-span: experimental study and three-dimensional FEM modeling

Cited by 5 publications

References 37 publications

Flexural and Shear Strengthening of Reinforced-Concrete Beams with Ultra-High-Performance Concrete (UHPC)

Flexural and Shear Strengthening of Reinforced-Concrete Beams with Ultra-High-Performance Concrete (UHPC)

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

An Assessment of the Structural Performance of Rebar-Corroded Reinforced Concrete Beam Members

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