Experimental Work on Shear Strengthening of Beams Using Post-Tensioned Metal Straps Wrapped Around Steel Plates Anchored to Normal Steel-Reinforced Concrete Beams

Abdullah, Wrya; Rafiq, Serwan

doi:10.1007/s40996-021-00729-1

Cited by 4 publications

(5 citation statements)

References 30 publications

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“…They found an improvement of 18.4 % and 29.3% in ductility. Others have worked on using MSTT to strengthen normal R.C beams in the shear [14,21], but while this paper focuses on flexural strengthening, they have not been regarded as the work is on the shear and not bending.…”

Section: Methodsmentioning

confidence: 99%

Reviewing The Effectiveness of Different Methods of Applying Post-Tensioned Metal Straps (PTMS) In Enhancing the Flexural Strength of Normal Concrete Beams After Strengthening

Rafiq,

Abdullah

2024

Emerg. Technol. Eng. J.

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Concrete's strength and deformability can be enhanced by adding external lateral confinement. Several materials and confinement techniques have been investigated throughout the development of confined concrete, including Post-Tensioned Metal Straps (PTMS). This study compares three methods of using PTMS to strengthen normal Reinforced Concrete (R.C) beams in bending. First, the method of completely wrapping the beams longitudinally with metal straps is assessed. Secondly, the application of lateral metal straps is examined. Finally, the method of combining metal straps with steel channels is investigated. The assessment criteria included price, effort required for application, applicability of the method, strength enhancement, and ductility of the enhancement. It is concluded that wrapping the beam longitudinally with metal straps is the most cost-effective and easiest method. However, the use of metal straps with steel channels offers greater applicability, strength, and ductility, as it can be applied to any concrete beam. Finally, it is demonstrated that ANSYS can accurately model beams strengthened with metal straps, as evidenced by the good match between the failure modes of beams tested experimentally and analytically.

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Section: Methodsmentioning

confidence: 99%

Reviewing The Effectiveness of Different Methods of Applying Post-Tensioned Metal Straps (PTMS) In Enhancing the Flexural Strength of Normal Concrete Beams After Strengthening

Rafiq,

Abdullah

2024

Emerg. Technol. Eng. J.

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“…The self-weight of the beams was examined, and the Poisson's ratio (v) for concrete was assumed to be 0.2 (Bangash, 1989). When a crack occurs, ABAQUS uses smeared cracks to execute constitutive calculations independently at each integration point of the finite element model, with the presence of cracks considered (Abdullah, 1993). Tension stiffening can be modeled numerically by varying the stiffness of reinforcing bars or increasing the stiffness of concrete such that it can carry the tensile force following cracks (Chaudhari and Chakrabarti, 2012).…”

Section: Finite Element Modellingmentioning

confidence: 99%

Numerical Study of Composite Concrete Castellated Double Channel Beams with Strengthening Techniques

Abbas,

Alshimmeri

2024

jcoeng

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Current numerical research was devoted to investigating the effect of castellated steel beams without and with strengthening. The composite concrete asymmetrical double hot rolled steel channels bolted back to back to obtain a built-up I-shape form are used in this study. The top half part of the steel is smaller than the bottom half part, and the two parts were connected by bolting and welding. The ABAQUS/2019 program employed the same length and conditions of loading for four models: The first model is the reference without castellated and strengthening; the second model was castellated without strengthened; the third model was castellated and strengthened with reactive powder concrete encased in the steel web, and the fourth model was castellated and strengthened with reactive powder concrete and lacing steel rebar's welded diagonally on two sides of the steel web. According to the Numerical results, there was an increase in ultimate load capacity compared to the reference model of about 22.74%, 51.65%, and 77.98% in the second, third, and fourth models, respectively; also, there is a reduction in deflection of 55.52%, 58.74, and 60.55% in the second, third, and fourth models, respectively, compared to the level deflection at ultimate load for the reference model, with an increase in stiffness and ductility. In comparison to the I section, the fabrication of a castellated steel beam from the double channel is more cost-effective in terms of cutting steel loss at the ends of the castellated beam, this is due to the feature of rotation and reflection of the steel channel section during cutting and forming to castellated shape.

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“…The literature has extensive experimental work on the use of post-tensioned metal straps (PTMS) in strengthening concrete specimens. After the original developers of the method, numerous researchers investigated the usage of metal straps in strengthening concrete members (Abdullah and Rafiq, 2021; Garcia et al, 2014; Imjai et al, 2018, 2020; Lopez et al, 2012; Helal et al, 2016a, 2016b; Thongphuue et al, 2019). From those researchers, only a few people worked on using PTMS for enhancing the shear strength of RC beams (Abdullah and Rafiq, 2021; Yang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Abdullah and Rafiq (2021) tested the effectiveness of PTMS, which were wrapped around steel plates fastened to the sidewalls of beams. To do this, they cast seven normally RC beams with measurements of 160 mm × 240 mm x 1050 mm which are width, depth, and length respectively.…”

Section: Introductionmentioning

confidence: 99%

“…After the original developers of the method, numerous researchers investigated the usage of metal straps in strengthening concrete members (Abdullah and Rafiq, 2021; Garcia et al, 2014; Imjai et al, 2018, 2020; Lopez et al, 2012; Helal et al, 2016a, 2016b; Thongphuue et al, 2019). From those researchers, only a few people worked on using PTMS for enhancing the shear strength of RC beams (Abdullah and Rafiq, 2021; Yang et al, 2019). Yang et al (2019) investigated the shear behavior of fire-damaged RC T-beams that are actively contained by prestressed steel straps (PSS).…”

Section: Introductionmentioning

confidence: 99%

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Shear strengthening of normal steel reinforced concrete beams using post-tensioned metal straps fully wrapped around the beams

Abdullah

2023

Advances in Structural Engineering

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Using post-tensioned metal straps (PTMS) as a method of strengthening reinforced concrete building members is relatively new, however, it has been tested mostly on small specimens. Therefore, this study is an attempt to show the effectiveness of PTMS fully wrapped around medium- scale steel reinforced concrete (RC) beams to enhance their shear strength. For this purpose, four normal RC beams are constructed without transverse reinforcement with dimensions of 160 mm × 240 mm x 1050 mm which are width, depth, and length respectively. To strengthen the beams, PTMS is wrapped fully around the beams at different locations with different strip numbers. It is found that if used properly, PTMS can effectively alter the type of failure of the beams from a brittle shear failure to a ductile bending failure. Additionally, the load-carrying capacity of the beam can increase by 143%, 170%, and 182% by using two, four, and six strips of PTMS respectively. Moreover, the deflection capacity increases by 643%, 557%, and 653% by using two, four, and six straps of PTMS. Finally, after using PTMS on the beam there is a reduction in the number of cracks and the location of their appearance will be localized in the center of the beam.

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Experimental Work on Shear Strengthening of Beams Using Post-Tensioned Metal Straps Wrapped Around Steel Plates Anchored to Normal Steel-Reinforced Concrete Beams

Cited by 4 publications

References 30 publications

Reviewing The Effectiveness of Different Methods of Applying Post-Tensioned Metal Straps (PTMS) In Enhancing the Flexural Strength of Normal Concrete Beams After Strengthening

Reviewing The Effectiveness of Different Methods of Applying Post-Tensioned Metal Straps (PTMS) In Enhancing the Flexural Strength of Normal Concrete Beams After Strengthening

Numerical Study of Composite Concrete Castellated Double Channel Beams with Strengthening Techniques

Shear strengthening of normal steel reinforced concrete beams using post-tensioned metal straps fully wrapped around the beams

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