Flexural performance of self-compacted perforated concrete beams under repeated loading

Gohar, Samar; Afefy, Hamdy M.; Kassem, Nesreen M.; Taher, Salah El‐Din F.

doi:10.1016/j.engstruct.2017.04.031

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…Providing multiple web opening in RC beams have been studied recently considering different shapes such as circular, oval, square and rectangle and hexagonal. It was found that reinforcement configuration around the openings and the opening size are the governing factor on the ultimate capacity of such perforated beams [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Arched Self-Compacted Perforated Reinforced Concrete Beams

Kassem

Taher

Afefy

et al. 2022

International Journal of Advances in Structural and Geotechnica

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Providing web openings in reinforced concrete (RC) beams facilitates passing the pipes and ducts of utility services as well as it has a good-looking appearance when arranged in regular module. The current paper presents both experimental and numerical investigations on the overall structural performance of two-hinged perforated self-compacted RC arched beams. Three main factors were studied; namely, the percentage of mass loss (9% 16% and 29%) due to the provided perforations, the effect of the curvature ratio and the perforations shape (circular, oval, and square). Therefore, three perforation sizes were studied having perforation diameter to the beam total depth ratio (D/t) of 0.33, 0.50, and 0.67. Accordingly, five perforated arched beams, one solid reference arched beam and one solid straight beam were prepared and configured then tested under concentrated loading till complete collapse. Besides, numerical validation using ABAQUS program has been conducted on the perforated arched beams. It was found that the ached beam showed remarkable ultimate capacity compared to that of straight beam; however the strength gain due to arching effect reduce significantly based on the perforation size and shape. Furthermore, the obtained responses along with the mode of failure from the experimental test were compared with the predicted ones from the numerical simulation. Comparison showed good agreement between the displayed mode of failure, ultimate capacity and the developed mid-span deflection obtained from both numerical simulation and the experimental tests.

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Section: Introductionmentioning

confidence: 99%

Behavior of Arched Self-Compacted Perforated Reinforced Concrete Beams

Kassem

Taher

Afefy

et al. 2022

International Journal of Advances in Structural and Geotechnica

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“…In the period from 2008 to 2020, most of the experimental tests were based on the comparison of test results of the beams made of SCC and conventional vibrated concrete (VC), as well as on comparisons with recommendations defined by regulations for structures made of VC [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…Experimental examination of the ultimate bearing capacity and ultimate serviceability of beams of different cross sections made of SCC exposed to bending and shear has been presented in a large number of scientific publications [16][17][18][19]22,24,[27][28][29][30][31]. Almost identical characteristics of the beams made of vibrated and SCC exposed to short-term static load were observed, and the SCC beams showed equal or lower ultimate shear and flexural strength than VC test members.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Continuous Beams Made of Self-Compacting Concrete (SCC)—Experimental and Numerical Analysis

et al. 2020

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Self-compacting concrete (SCC) is a type of concrete that is placed in the formwork under its own weight. Although there are many studies showing the behavior of SCC beams, most relate to the behavior of simple supported beams. Unlike those, this is a study of continuous beams made of SCC aimed to analyze their flexural performance as well as to confirm the possibility of using nonlinear finite element analysis (FEA) in the design of such structural elements. An experimental study of three two-span continuous beams of a total length of 3400 mm, with the span between supports of 1600 mm, with 150/200 mm cross section made of SCC exposed to short-term loading, was carried out. The parameter that varied is the percentage of tensile reinforcement, with values of 0.65, 0.86 and 0.94 being selected. As all analyzed beams have shown a satisfactory load-bearing capacity and stiffness, the research confirmed the possibility of using SCC in continuous beams in civil engineering practice. Using Abaqus/Standard software, a nonlinear numerical model is proposed, which is validated and verified against experimental research, as there is only a 5% difference in the numerically calculated ultimate load compared to the experimentally measured values.

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