Structural assessment of the coupled influence of corrosion damage and seismic force on the cyclic behaviour of RC columns

Biswas, Rajib Kumar; Iwanami, Mitsuyasu; Chijiwa, Nobuhiro; Nakayama, Kazuhide

doi:10.1016/j.conbuildmat.2021.124706

Cited by 23 publications

(5 citation statements)

References 34 publications

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“…The FE analysis was carried out in the LINK 3 software. The reliability of the software can be verified elsewhere [34][35][36][37][38]. Rebar corrosion and bond loss between rebar and nearby concrete were modeled with reduced rebar area and corrosion-induced cracking.…”

Section: Comparison Of Experimental Study and Fe Analysismentioning

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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Section: Comparison Of Experimental Study and Fe Analysismentioning

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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show abstract

“…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%

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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“…A building may partially or completely collapse if the RC column fails or was not intended to withstand the appropriate load capacity. Several causes contribute to the worsening of load-displacement behavior in RC concrete columns, like preloading, design or construction flaws, alterations to the system's structure, deterioration brought on by prolonged exposure to harsh conditions or by accidental overuse, design code modifications, failure to implement a preventative maintenance plan, stress deformation due to earthquakes and exposure to extreme temperatures (17)(18)(19)(20). Aspect ratio is also one of the influence factors for the load-carrying capacity of existing structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Fiber Reinforced Polymer Retrofitted Short Reinforced Concrete Circular Columns under Concentric Compressive Load

Parghi,

Patel,

Lunagaria

2024

IJE

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The presents study numerically investigates the fiber-reinforced polymer (FRP) retrofitted shortdamaged reinforced concrete (RC) columns subjected to axial compression load. The main parameter considered to evaluate the effectiveness of FRP retrofitting on circular columns with different aspect ratios, concrete grade, and FRP material. To simulate the behaviour of a short RC column under a uniaxial compression load, a finite element model of the column was developed. The model was then modified to simulate the various level of damage to the column and the behaviour of the column under uniaxial load. The effectiveness of FRP retrofit was studied comparing the behaviour of the retrofitted column to the damaged column. For M20 concrete column retrofitted with carbon fiber reinforced polymer (CFRP) showed a higher strength (2 to 3 times) than glass fiber reinforced polymer (GFRP) retrofitted columns. For M30 concrete, the range is quite similar (1.5 -2.3 times more). The effectiveness of both FRPs retrofitted columns increases with increasing aspect ratio from 2 and 3, but slightly decreases for an aspect ratio of 4 compared to the damaged specimen. The maximum effectiveness achieved for CFRP retrofitted columns is of 19.45% and for GFRP retrofitted column is of 10.71%, and the other grade of concrete (M30) followed a similar trend. The load-bearing capacity of columns has no significant effect by the increase in aspect ratio from 2 to 4.

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Structural assessment of the coupled influence of corrosion damage and seismic force on the cyclic behaviour of RC columns

Cited by 23 publications

References 34 publications

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

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

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

Numerical Investigation of Fiber Reinforced Polymer Retrofitted Short Reinforced Concrete Circular Columns under Concentric Compressive Load

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