Behavior of Ductile Beam with Addition Confinement in Compression Zone

Priastiwi, Yulita Arni; Imran, Iswandi; Nuroji,; Hidayat, Arif

doi:10.1016/j.proeng.2014.12.172

Cited by 21 publications

(6 citation statements)

References 2 publications

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“…20 More recently, a study on the effects of confinements in the form of links and longitudinal rebars in the compression zone was carried out on two sets of RC beams where the first set was of dimensions 175 mm (width) × 300 mm (depth) × 2400 mm (length) while the other was of 150 mm (width) × 300 mm (depth) × 2400 mm (length). 13 The confinements used were of 8 mm diameter with 50 mm and 100 mm pitches. The control beams did not have any confinement reinforcements.…”

Section: 19mentioning

confidence: 99%

Behaviour of Over-reinforced Concrete Beams with Double Helix and Double Square Confinements Related to Ultimate Bending and Shear Strength

Tee¹,

Al-Sanjery²,

Chiang³

2018

JPS

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Section: 19mentioning

confidence: 99%

Behaviour of Over-reinforced Concrete Beams with Double Helix and Double Square Confinements Related to Ultimate Bending and Shear Strength

Tee¹,

Al-Sanjery²,

Chiang³

2018

JPS

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“…To change the failure mode of concrete from brittle to ductile failure for over-reinforced concrete beams, there are different techniques used in previous studies to improve the ductility of concrete in the compression zone, such as using a steel plate bolted with a compression zone of concrete (Alasadi, Shafigh & Ibrahim, 2020), addition confinement in the compression zone (Priastiwi, Imran, Nuroji & Hidayat, 2014;Tee, Al-Sanjery & Chiang, 2017), a block or precast block can be cast in compression zone (Liu & Wu, 2007;Wu, 2008), and using ductile materials, this can do by replacing the concrete in the compression zone with a layer of material that has both high strength and ductility.…”

Section: Introductionmentioning

confidence: 99%

Stress–strain relationship of ductile materials and flexural behavior of ductile over-reinforced concrete beams

DUHAIM¹,

MASHREI²

2022

srees

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This paper aimed to investigate the effect of using ductile materials in the compression zone on the flexural performance of over-reinforced concrete beams. In order to avoid brittle compression failure, partial replacement of concrete with ductile materials layer in the compression zone was used. Four over-reinforced concrete beams of size 120 × 180 × 1,300 mm were cast and tested under three-point loading conditions. The steel fibers reinforced concrete (SFRC), slurry infiltrated fiber concrete (SIFCON), and ultra-high performance fiber reinforced concrete (UHPFRC) were used as ductile materials. The flexural capacity of the beams, failure modes, crack patterns, load-deflection relationships, ductility index, and toughness were investigated. The results showed that using ductile materials in the compression zone is an effective technique to increase the ultimate load, ductility, and toughness by up to 52.46, 84.78 and 279.93%, respectively, compared to the reference beam. In addition, the failure mode changed from brittle to ductile failure. Noting that the use of SFRC layer enhanced the ductility of over-reinforced concrete beams more than using UHPFRC and SIFCON layers. Also, one of the main advantages of this technique is led to increase the tensile reinforcement ratio up to 8.548% without needing the compressive reinforcement. Thus, ductile composite beams with a high flexural capacity were generated using an economical amount of ductile materials.

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“…Te results showed that the ductility of RC beams could be improved by using rectangular tension bars to constrain the compression zone, and the spiral constraint was more efective than the rectangular constraint. Priastiwi et al [20] set additional constraint stirrups in the compression zone of concrete beams, which improved fexural bearing capacity and ductility signifcantly compared with the control beams. Te method of adding the UHPC layer in the compression zone of over-reinforced beams has not been reported in the current research.…”

Section: Introductionmentioning

confidence: 99%

Flexural Reinforcement of Over-Reinforced Beam by Ultrahigh Performance Concrete Layer

Yang

Yao

Liu

2022

Mathematical Problems in Engineering

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In order to improve the failure state of over-reinforced beams and enhance their ductility, an innovative reinforcement method was proposed by adding an ultrahigh performance concrete (UHPC) layer on the top surface of the over-reinforced beam to take advantage of the high compressive strength of UHPC. The numerical simulation method was used to carry out the research. The validity of the finite element model was verified by comparing it with the experimental results, and the effectiveness of the new reinforcement method was verified by comparing it with the calculation results after adding the UHPC layer. Then, a detailed parameter study was carried out, including the thickness of the UHPC layer, the cross-section area of longitudinal tension rebar, and concrete strength. The load-deflection curve, flexural bearing capacity, and deflection ductility coefficient were studied. The results show that the bearing capacity of the UHPC-reinforced over-reinforced beams is significantly increased by 88.1%. And the stiffness and ductility of the beams are also significantly increased, with the ductility coefficient reaching 23.85. In addition, flexural bearing capacity increases with the thickness of the UHPC layer and sectional area of longitudinal tension rebar. Finally, a prediction model for the flexural bearing capacity of UHPC layer-reinforced over-reinforced beams is proposed, which further verifies the effectiveness of this method.

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Behavior of Ductile Beam with Addition Confinement in Compression Zone

Cited by 21 publications

References 2 publications

Behaviour of Over-reinforced Concrete Beams with Double Helix and Double Square Confinements Related to Ultimate Bending and Shear Strength

Behaviour of Over-reinforced Concrete Beams with Double Helix and Double Square Confinements Related to Ultimate Bending and Shear Strength

Stress–strain relationship of ductile materials and flexural behavior of ductile over-reinforced concrete beams

Flexural Reinforcement of Over-Reinforced Beam by Ultrahigh Performance Concrete Layer

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