Behaviour of RC Beams with Strengthened Web Openings under Vertical Loads

Hamad, Sarah A.; Shakir, Qasim M.

doi:10.1088/1757-899x/1094/1/012062

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…2012 [35] studied theoretically, the elastic response for slender rectangular pocket and spandrel beams. Hamad and Shakir, 2021 [36], studied experimentally the behavior of self-compacting reinforced concrete beams with in-plane loaded openings that were strengthened by several techniques. The recorded enhancement in capacity ranged in 8-21%.…”

Section: Figure 1 Some Joints Configurations In Two Crossed Precast B...mentioning

confidence: 99%

Enhancement of the behaviour of reinforced concrete dapped end beams including single-pocket loaded by a vertical concentrated force

Shakir

Hamad

2023

Eng. rev. (Online)

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In precast building construction, some beams are designed to support one or several concentrated loads resulting from the reactions of the attached cross beams. Consequently, the pocket beams without or with dapped ends may represent one of the innovative solutions to constitute the joints between the two attached members. In the present research work, the behaviour of dapped end beams that included rectangular opening loaded with in-plane force, have been investigated. Several detailing have been proposed, in addition the vertical stirrups, to improve the strength of the opening region including the use of steel fibre concrete (SFC),Configuration of the inclined crossed bars, jacketing with steel plates and the composite section technique with two arrangements of the reinforcement of the dapped end . Ten specimens have been tested under gradually increased vertical static loading. The tested specimens are categorized into two sets based on the configuration of dapped end reinforcement. Two variable have been considered which are the strengthening configuration of the opening region and the configuration of the dapped end reinforcement. The response has been discussed in terms several indicators including, the cracking and failure loads, maximum deflection, mode of failure, load-deflection curves, crack patterns, crack width, to recognize the optimum strengthening proposal of the opening. Results revealed that using the inclined steel bars (modified arrangement) yield better response than the conventional (standard) reinforcement (vertical stirrups) within the dapped end. For beams with pockets strengthened with crossed inclined bars, failure load enhanced in range of (8.5-11%) whereas the enhancement was in ranged in (8-10%) for the steel SFC method. Moreover, an improvement by about (11-13%) in load capacity increased when the jacketing with steel plates was applied. The maximum improvement was obtained when using the embedded rolled section within the opening with values of (21-23%).

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Section: Figure 1 Some Joints Configurations In Two Crossed Precast B...mentioning

confidence: 99%

Enhancement of the behaviour of reinforced concrete dapped end beams including single-pocket loaded by a vertical concentrated force

Shakir

Hamad

2023

Eng. rev. (Online)

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“…Many studies proved that the incorporation of steel fibers in concrete resulted in significant improvement in the general performance of the structural members in terms of reducing rate of cracking and deformation [8]. Consequently, steel fibers have been included in beams, slab, corbel, around web openings, dapped end [9][10][11][12]. In deep beam, steel fiber have been used to improve the shear strength [13][14].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Model of Reinforced Concrete Deep Beams With Curved Hybridization

Shakir

Hannon

2023

Jurnal Teknologi

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In the present study, a new model of hybrid deep beams has been proposed and discussed. Six specimens are tested experimentally with two types of loading which are one-point and two-point loading and two hybridization models for concrete section. It is aimed from this study to search for the optimum distribution of the concrete types of the hybrid deep beams such that the lowest cost and weight to be reached with keeping the capacity without significant reduction. All specimens had the same dimensions, overall span of 1700 mm, 180 mm wide and 450 mm overall depth and the same steel reinforcement details. Results showed an increase in the capacity in the horizontal and the arched hybrid model by 27.6% and 39%, respectively, with one-point system. Moreover, toughness, enhanced by 44% and 131% for the two models respectively whereas, stiffness enhanced by 6.5% and 34.2% respectively and ductility enhanced by 0% and 31.2% respectively. For tests under two point loads, capacity enhanced by 34% and 36.9%, respectively, Toughness increased by 188% and 301% respectively. Stiffness enhanced by 7.5% and 29.4% respectively. Ductility enhanced by 40.3% and 95.1% respectively.

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Innovative Model of Precast RC Curved Hybrid Deep Beams Composed Partially with High-Performance Concrete

Shakir,

Hannon

2024

Arab J Sci Eng

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Behaviour of RC Beams with Strengthened Web Openings under Vertical Loads

Cited by 6 publications

References 4 publications

Enhancement of the behaviour of reinforced concrete dapped end beams including single-pocket loaded by a vertical concentrated force

Enhancement of the behaviour of reinforced concrete dapped end beams including single-pocket loaded by a vertical concentrated force

A Novel Hybrid Model of Reinforced Concrete Deep Beams With Curved Hybridization

Innovative Model of Precast RC Curved Hybrid Deep Beams Composed Partially with High-Performance Concrete

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