Experimental Investigation on Crack Initiation and Propagation Due to Corrosion of Reinforcement

Shakib, Sheikh; Morshed, Abu Zakir

doi:10.1520/acem20190161

Cited by 2 publications

(4 citation statements)

References 27 publications

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“…It consequence an initiation of crack at the cover surface and propagated inward. This phenomenon was observed experimentally by Shakib and Morshed (2019).…”

Section: Crack Initiation Mechanismsupporting

confidence: 64%

“…An expansive pressure employs and increases gradually as the corrosion progresses (Shakib and Morshed, 2019). This pressure consequences a tensile stress on the cover concrete.…”

Section: Model Verificationmentioning

confidence: 99%

“…Concrete is weak in tension which causes the initiation and propagation of cracks (Bhargava et al, 2006). The location of crack initiation depends on the cover thickness (Shakib and Morshed, 2019). In this research, mechanism of cracking was investigated through finite element modelling.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of Cover Concrete Cracking Due to Uniform Corrosion of Reinforcement

Shakib

Morshed

2021

J. of Eng. Sci.

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Cracking of cover concrete due to the corrosion of reinforcing steel is one of the main causes of deterioration in Reinforced Concrete (RC) structures. An outbound stress is developed in concrete surrounding the reinforcing steels due to the expansive corrosion products of reinforcement leading to cracking of the concrete cover. In this paper, the cracking pressure was simulated through a finite element modeling. The effect of geometrical and material parameters, i.e. concrete cover thickness, bar diameter, and concrete tensile strength, on the cracking pressure was also investigated. Abaqus 6.14 was used as modeling platform. The cracking pressure was found to dependent on the cover thickness and tensile strength of concrete. A higher pressure was required to initiate crack for a higher cover thicknesses and tensile strength. The cracking pressure was decreased with the increase in bar diameter. Finally the crack initiation and propagation has been simulated successfully for different arrangements of reinforcements. Journal of Engineering Science 12(1), 2021, 43-49

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“…It consequence an initiation of crack at the cover surface and propagated inward. This phenomenon was observed experimentally by Shakib and Morshed (2019).…”

Section: Crack Initiation Mechanismsupporting

confidence: 64%

“…An expansive pressure employs and increases gradually as the corrosion progresses (Shakib and Morshed, 2019). This pressure consequences a tensile stress on the cover concrete.…”

Section: Model Verificationmentioning

confidence: 99%

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Modeling of Cover Concrete Cracking Due to Uniform Corrosion of Reinforcement

Shakib

Morshed

2021

J. of Eng. Sci.

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“…However, these structures lose some strength due to their normal use over time (Neville, 2011). Adverse weathering conditions, such as corrosion of reinforcement due to salinity as well as carbon dioxide, deterioration of concrete due to sulphates and alkaline solutions, wear and abrasion due to tidal effect, successive freeze-thaw effect, etc., deteriorate the structures (Ba zant, 1979;Mundra et al, 2017;Neville, 2011;Shakib et al, 2020;Shakib and Morshed, 2019;Val et al, 2009). Higher temperature exposure due to fire is another cause to deteriorate the reinforced concrete (RC) structures (Mahmud et al, 2021).…”

mentioning

confidence: 99%

Simulation of reinforced concrete beam retrofitted with steel angles subjected to flexure

Shakib

Morshed

Kholil

et al. 2022

MMMS

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PurposeThe study focused on improving stiffness and premature failure, the weaknesses of the other retrofitting techniques and the retrofitted beam. A detailed study regarding the section properties and effective length of the angles was also carried out in this study.Design/methodology/approachIn this article, a comprehensive study was carried out using a finite element method to investigate the behavior and performance of steel angles as a retrofitting technique subjected to flexure. A model was developed in ABAQUS and validated with the available experimental works. The model was then applied to examine the beams retrofitted with the steel angles.FindingsFrom the investigation, the strengthening technique successfully enhanced the flexural capacity and stiffness of the beam. The stiffness of the retrofitted beam achieved more than 2.5 times of the controlled beam. The thickness and flange width of the angles improved both the load capacity and stiffness whereas, web width, having same flange width, improved the stiffness only. This study also illustrates that a premature failure can be minimized by maintaining L/S (length to span) ratio between 0.7 and 1.0 along with the welding to provide the connections between the angles and stirrups.Practical implicationsThe developed model and the findings can be used for designing the retrofitting technique for the damaged as well as beams to be increased their capacity.Originality/valueThe research focused on the implication of a new technique of retrofitting, steel angles to improve the stiffness of beam, which is one of the major drawbacks of traditional techniques. Moreover, the research aimed to improve premature failure by bonding the retrofitting materials with the stirrups of the mother beam through welding.

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Experimental Investigation on Crack Initiation and Propagation Due to Corrosion of Reinforcement

Cited by 2 publications

References 27 publications

Modeling of Cover Concrete Cracking Due to Uniform Corrosion of Reinforcement

Modeling of Cover Concrete Cracking Due to Uniform Corrosion of Reinforcement

Simulation of reinforced concrete beam retrofitted with steel angles subjected to flexure

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