Structural behaviour of pre-damaged RC columns immediate repaired employing pre-tensioned steel straps

Apandi, Nazirah Mohd; Ma, Chau-Khun; Awang, Abdullah Zawawi; Omar, Wahid

doi:10.1016/j.istruc.2021.08.039

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…The privilege of using finite element models is the skill to simulate various malfunctions in the structure, adapting the calculation results to genuine operating conditions. By the deviation of the calculated values real stresses, one can judge the damage degree to the bridge superstructures [12].…”

Section: Materials and Methods Of Researchmentioning

confidence: 99%

“…Experimental tests [12] in the repair of reinforced concrete columns with different levels of preliminary damage. The test results showed that the determination of bearing capacity, axial displacement, stiffness and plasticity of the repaired columns have a significant impact on the restorability of the confinement.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Development of safety methods on artificial structures of railway lines

Akbayeva

Muratbekova

Altayeva

et al. 2022

EEJET

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The numerous cases of deformation of technogenic objects in the transport industry under increasing axial loads and speeds of motion aggravate the need to solve the problems of early recognition of the nature and causes of deformations of structural elements. The need for this is due to the fact that destructions and accidents, resulting from deformation processes, cause enormous economic, social and environmental damage, incomparable with the funds spent on protective measures. The object of the study in the article is a railway trestle, consisting of two spans of a ribbed reinforced concrete beam. Determination of the residual resource in terms of bearing capacity and load-carrying capacity of the railway trestle is the main task. The authors have obtained bending deformations (stresses), frequencies of natural vibrations and operating modes of structures of railway trestle spans. The damage degree of the railway overpass spans structures may also be judged by the deviation of the calculated values of the amplitude-phase-frequency characteristics (AFFR) from the standard values. The peculiarity of this research is the fact, that the natural frequencies of railway overpass vibrations are determined either by «tails» of experimental vibrograms (oscillograms) after the load release from the span structure. During the express-diagnostics of railway overpasses, the relative deformations (stresses) of girder spans in the middle of the span, the first frequency (period) of natural vibrations of girder reinforced concrete spans of railway overpasses are used as parameters characterizing the technical condition of the spans. The results of tests and examinations of overpasses to ensure their safe operation have been given

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Section: Materials and Methods Of Researchmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development of safety methods on artificial structures of railway lines

Akbayeva

Muratbekova

Altayeva

et al. 2022

EEJET

View full text Add to dashboard Cite

show abstract

“…where, f'y is yield strength of corroded steel confinement. Combining both Eq (3) and Eq (4), confining pressure considering effect of corrosion, f'l can be calculated by Eq (5):…”

Section: Modification On Existing Confinement Modelsmentioning

confidence: 99%

“…Chin et al [4] reported that with application of SSTT, the confined concrete able to achieve ductile post-peak behavior. It was also proven that SSTT able to rehabilitate damaged concrete structures, returning to its original strength [5][6][7]. Mohd Apandi et al [7] proven the ability of SSTT to rehabilitate the strength and ductility of damaged concrete structure, delaying its damage by increasing the ultimate strain.…”

Section: Introductionmentioning

confidence: 99%

Corrosion effects on axial compressive behavior of steel strapping tensioning technique-confined concrete

Goh,

Ler,

Chin

et al. 2023

Res. Eng. Struct. Mat.

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This paper presents an experimental study on effect of corrosion on durability performance of circular Steel Strapping Tensioning Technique (SSTT)-confined concrete tested under uniaxial compression. A total of 13 specimens, including 11 confined specimens and 2 plain specimens were tested in this study. The main parameters were prestressing level and corrosion protection. Corrosion was simulated through impressed current accelerated corrosion technique. The experimental results indicated that influence of corrosion was insignificant on peak strength and slight reduction in deformation ability to corroded circular SSTT-confined concrete under low corrosion severity. It was observed that Zn-Al-Cd ingot and long-oil alkyd paint coating shows good protection ability, while 6061 aluminum alloy and 99.9% pure magnesium is not suitable to be used as corrosion protection system. Based on regression analysis, prediction models for peak stress and peak strain for circular corroded SSTT-confined concrete were proposed.

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Pullout Behaviour of Bars in Concrete Confined with Post-tensioned Steel Straps

Sulaiman

Chin

et al. 2021

Int J Civ Eng

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Structural behaviour of pre-damaged RC columns immediate repaired employing pre-tensioned steel straps

Cited by 6 publications

References 36 publications

Development of safety methods on artificial structures of railway lines

Development of safety methods on artificial structures of railway lines

Corrosion effects on axial compressive behavior of steel strapping tensioning technique-confined concrete

Pullout Behaviour of Bars in Concrete Confined with Post-tensioned Steel Straps

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