Numerical assessment of bond-slip relationships for naturally corroded plain reinforcement bars in concrete beams

Yu, Xiaotong; Robuschi, Samanta; Fernandez, Ignasi; Lundgren, Karin

doi:10.1016/j.engstruct.2021.112309

Cited by 16 publications

(5 citation statements)

References 20 publications

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“…Further, Equations ( 5)-( 9) are used in the calculations. The column constraints correspond to (2) shown in Figure 1a, where the bottom support node is rigidly fixed, and the top one is hinge fixed. The rebars of the column are symmetrical; longitudinal rebars 4d28 are located in the corners of the section, and stirrups d10 have a spacing of 0.25 along the height of the column.…”

Section: The Case Of Lcbc Made For a Reinforced Concrete Column With ...mentioning

confidence: 99%

“…The experiment involved accelerated electrochemical corrosion induced by direct current. In [2], the effect of the bond between rebars and concrete on the load-bearing capacity of beam structures is studied if rebars are corrosion-damaged. It is emphasized that the anchorage of rebars in concrete is the determining factor in case of corrosion damage of reinforced concrete beams.…”

Section: Introductionmentioning

confidence: 99%

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The Bearing Capacity of Compressed Corrosion-Damaged Reinforced Concrete Elements under Lateral Pulse Loading

Tamrazyan

2023

Buildings

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This article addresses the relevant problem of the stress–strain behavior of compressed reinforced concrete columns under lateral pulse loading. A simplified engineering method of analyzing the limit value of lateral pulse loading P, depending on longitudinal force N acting on the column, is developed. The proposed method involves the construction of the P-N curve that has three portions. Portion 1 describes the plastic deformation of concrete and rebars of that part of the structure that is mostly in bending. Portion 2 describes the state of the column that can trigger the brittle failure of the concrete along the normal section, and Portion 3 describes the high compression of the column that predominantly triggers its shear failure. For Portions 1 and 2, analytical relationships are obtained using equilibrium equations. Corrosive damage is taken into account in the analytical model as a reduction in the strength and deformability characteristics of the material. A conventional local corrosion spot can be considered; it can be located both in and outside of the area of action of lateral pulse loading. The results obtained using the proposed model were compared with the results of numerical studies and a full-scale experiment. As a result of testing the developed engineering technique, it was found that it provides a safety margin for corrosion-damaged elements of 0.20–0.8 of the ultimate value of horizontal impulse at operational values of compressive force. The spot corrosion damage considered in the paper leads to a 10–60% strength reduction in compressed columns, depending on their location.

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Section: The Case Of Lcbc Made For a Reinforced Concrete Column With ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Bearing Capacity of Compressed Corrosion-Damaged Reinforced Concrete Elements under Lateral Pulse Loading

Tamrazyan

2023

Buildings

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“…The regression coefficients ranged between 0.74 [26] and 0.97 [27]. Furthermore, many studies were dedicated to investigating the effect of corrosion on the bond between the concrete and the steel [21,[28][29][30][31][32] and its effect on the structural behaviour of corroded beams in bending. Bond deterioration and cover cracking affect the stress transfer between the steel and the concrete, which in turn is manifested by increased deflections, fewer and wider bending cracks for corroded beams failing in flexure [17,26].…”

Section: List Of Symbolsmentioning

confidence: 99%

Effect of pre-existing longitudinal and transverse corrosion cracks on the flexural behaviour of corroded RC beams

Nasser

Verstrynge

2022

Construction and Building Materials

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“…Generally, the corrosion of steel will decrease the service life of RC structures and result in significant economic losses. The consequent impact of reinforcement corrosion includes the loss of bond between reinforcement and concrete, cracking of the concrete cover, and a decrease in the cross-sectional area of the steel [ 3 , 4 ]. The cost of corrosion damage is rapidly increasing (it has been estimated to be between 3 and 4% of GDP) [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

A Laboratory and Field Assessment of the Performance of Rebar Coatings

Al‐Dulaijan

2023

Materials

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Deteriorating concrete structures are repaired to restore their load-carrying capacity and enhance their appearance. As part of the repair procedure, the corroded reinforcing steel bars are cleaned by sandblasting, and a protective coating is applied to protect them from further corrosion. Generally, a zin-rich epoxy coating is used for this purpose. However, there have been concerns about the performance of this type of coating in protecting the steel due to the formation of galvanic corrosion, thus necessitating the need for developing a durable steel coating. In this study, the performance of two types of steel coatings, namely a zinc-rich epoxy and cement-based epoxy resin coating, was investigated. The performance of the selected coatings was evaluated by conducting both laboratory and field experiments. In the field studies, the concrete specimens were exposed to a marine exposure site for more than five years. The salt spray and accelerated reinforcement corrosion studies indicated that the performance of the cement-based epoxy coating was better than the zinc-rich epoxy coating. However, there was no visible difference between the performance of the investigated coatings in the reinforced concrete slab specimens placed in the field. It is suggested to use cement-based epoxy coatings as steel primers based on the field and laboratory data developed in this study.

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Numerical assessment of bond-slip relationships for naturally corroded plain reinforcement bars in concrete beams

Cited by 16 publications

References 20 publications

The Bearing Capacity of Compressed Corrosion-Damaged Reinforced Concrete Elements under Lateral Pulse Loading

The Bearing Capacity of Compressed Corrosion-Damaged Reinforced Concrete Elements under Lateral Pulse Loading

Effect of pre-existing longitudinal and transverse corrosion cracks on the flexural behaviour of corroded RC beams

A Laboratory and Field Assessment of the Performance of Rebar Coatings

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