Theoretical and numerical analysis of reinforced concrete beams with confinement reinforcement

Delalibera, Rodrigo Gustavo; Giongo, José Samuel

doi:10.1590/s1983-41952008000100002

Cited by 10 publications

(7 citation statements)

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“…Overall, it was indicated that the increase in the ratio of longitudinal reinforcements would increase the displacement ductility index, allowing the occurrence of a higher ultimate in the beam [8]. Several other findings were also developed on the installation of short stirrups as confinements [19]. Specifically, Jeffery and Hadi reported that helical reinforcements had higher effectiveness compared to short stirrups to improve the flexural capacity and displacement ductility index of the confined concrete [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Behavior of over Reinforced Concrete Beams Bolted with Compression Steel Plate: Part I

2020

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The purpose of this paper is to investigate the flexural behavior of over-reinforced concrete beam enhancement by bolted-compression steel plate (BCSP) with normal reinforced concrete beams under laboratory experimental condition. Three beams developed with steel plates were tested until they failed in compression compared with one beam without a steel plate. The thicknesses of the steel plates used were 6 mm, 10 mm, and 15 mm. The beams were simply supported and loaded monotonically with two-point loads. Load-deflection behaviors of the beams were observed, analyzed, and evaluated in terms of spall-off concrete loading, peak loading, displacement at mid-span, flexural stiffness (service and post-peak), and energy dissipation. The outcome of the experiment shows that the use of a steel plate can improve the failure modes of the beams and also increases the peak load and flexural stiffness. The steel development beams dissipated much higher energies with an increase in plate thicknesses than the conventional beam.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Behavior of over Reinforced Concrete Beams Bolted with Compression Steel Plate: Part I

2020

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“…ANSYS modeling of RC beam behaviour with stress contour plot and crack pattern have been investigated by Barbosa and Gabriel (1998), Sugianto and Taufik (2008) and Tjitradi et al (2017). Delalibera et al (2008) and Wolanski (2004) have conducted theorytical and numerical analysis of RC beam behavior.…”

Section: Introductionmentioning

confidence: 99%

ANSYS Numerical Modeling of Confined Deep Beam with High Strength Concrete

Taufik¹,

Anggarini²,

Setiawan³

2020

International Journal of Structural Glass and Advanced Material

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In the numerical modeling presented, the deep beam is accounted for by means of a three dimensional FEA ANSYS 13.0 approach, in which the structure is modeled with load-displacement-based solid finite elements, whereas the internal work structure interacted by high strength concrete and reinforcement in full scale. Most deep beam collapse is dominated by the shear brittle collapse. Recently, confinement is the most effective way to improve the ductility of the reinforced concrete, whereas required to anticipate the occurrence of direct crack on the beam caused by quite large shear forces. Numerical models of deep beam with high strength concrete is done gradually by giving a variation of concrete strength, confinement and stirrup spacing. The two point load are applied with the ultimate load on all models. Then, analyzing of the deep beam is to be done with and without side reinforcement and also an analysis of the crack pattern of the beam to calculate the brittle area under the ratio of crack volume occurred. Concrete is modeled by SOLID65 and steel reinforcement using SOLID45 element. The collapses occurred are all ultimate flexural compressive collapse on the loading plate area, due to brittle shear collapse. The condition occurred on deep beam first crack was already considered a collapse, the density of reinforcement and the additional distance comprehensive reinforcement bar is most effective in terms of adding high ductility of high strength concrete beams. By using the stirrup reinforcement with confinement mode can significantly enhance the resistance of ultimate capacity, cracking ratio and reduced deflection.

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“…Based on this, further investigation is needed on the behavior of confined normal strength concrete (NSC), high strength concrete (HSC), and pre-stressed beams [20,21]. Also, few studies have reviewed and reported on the installation of short stirrup confinement in the compression zone [22,23]. Moreover, there are studies on the improvement of beam capacity using a system consisting of two or three layers, referred to as a hybrid system.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Numerical Study on the Flexural Performance of Over-Reinforced Concrete Beam Strengthening with Bolted-Compression Steel Plates: Part II

et al. 2019

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This study presents an experimental investigation and finite element modelling (FEM) of the behavior of over-reinforced simply-supported beams developed under compression with a bolt-compression steel plate (BCSP) system. This study aims to avoid brittle failure in the compression zone by improving the strength, strain, and energy absorption (EA) of the over-reinforced beam. The experimental program consists of a control beam (CB) and three BCSP beams. With a fixed steel plate length of 1100 mm, the thicknesses of the steel plates vary at the top section. The adopted plate thicknesses were 6 mm, 10 mm, and 15 mm, denoted as BCSP-6, BCSP-10, and BCSP-15, respectively. The bolt arrangement was used to implement the bonding behavior between the concrete and the steel plate when casting. These plates were tested under flexural-static loading (four-point bending). The load-deflection and EA of the beams were determined experimentally. It was observed that the load capacity of the BCSP beams was improved by an increase in plate thickness. The increase in load capacity ranged from 73.7% to 149% of the load capacity of the control beam. The EA was improved up to about 247.5% in comparison with the control beam. There was also an improvement in the crack patterns and failure modes. It was concluded that the developed system has a great effect on the parameters studied. Moreover, the prediction of the concrete failure characteristics by the FE models, using the ABAQUS software package, was comparable with the values determined via the experimental procedures. Hence, the FE models were proven to accurately predict the concrete failure characteristics.

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Theoretical and numerical analysis of reinforced concrete beams with confinement reinforcement

Cited by 10 publications

References 1 publication

Experimental Study on the Flexural Behavior of over Reinforced Concrete Beams Bolted with Compression Steel Plate: Part I

Experimental Study on the Flexural Behavior of over Reinforced Concrete Beams Bolted with Compression Steel Plate: Part I

ANSYS Numerical Modeling of Confined Deep Beam with High Strength Concrete

An Experimental and Numerical Study on the Flexural Performance of Over-Reinforced Concrete Beam Strengthening with Bolted-Compression Steel Plates: Part II

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