Experimental investigation of the structural behaviours of self-compacted reinforced concrete hollow beams with in-place circular openings

Hassan, Saif A.; Hemzah, Sadjad A.; Alyhya, Wajde S.

doi:10.1088/1757-899x/671/1/012117

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Hassan [33] and Hassan et al [34] experimentally investigated the behaviour of hollow RC beams with different locations of openings subjected to two concentrated loads and indicated that the opening locations highly affected both the ultimate failure loads and stiffnesses. The tested hollow beams possessed reduced stiffnesses and increased deflections.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…Many studies have considered various configurations of web openings in RC beams [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. However, other studies have investigated structural behaviours of RC beams with longitudinal openings [8][9][10][11][26][27][28][29][30][31][32][33][34][35][36][37][38][39], and these studies are related to the current study and can be divided into two big groups, i.e., experimental and numerical studies in a chronological order.…”

Section: Introductionmentioning

confidence: 99%

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Structural Efficiency of Hollow Reinforced Concrete Beams Subjected to Partial Uniformly Distributed Loading

et al. 2021

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Reinforced concrete (RC) beams containing a longitudinal cavity have become an innovative development and advantage for economic purposes of light-weight members without largely affecting their resistance against the applied loads. This type of openings can also be used for maintenance purposes and usage space of communication lines, pipelines, etc. RC beams are primarily loaded in the plane of the members, which are two-dimensional in a plane stress state and the dominant structural behaviours include bending, shear, or combination of both. In the present study, six numerical models of RC beams with and without openings were simulated by using commercial finite element software ANSYS to evaluate the structural behaviours of those beam models under the partial uniformly distributed load. Different parameters were assessed, including opening dimensions and shear reinforcement ratios. The obtained numerical results were analysed and verified and were found very close to those obtained from the experimental investigations in the literature. The increase of shear reinforcement ratio could enhance the flexural and shear capacities of the RC beams, and the results also showed that some models sustained flexural failure while the others sustained failure of combined bending and shear.

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Section: Experimental Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Efficiency of Hollow Reinforced Concrete Beams Subjected to Partial Uniformly Distributed Loading

et al. 2021

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“…There are also many other studies, most of which focus on shallow beams and study the shape, depth, and diameter of the cavities. And the extent of their influence on the shear behavior and flexural behavior of these bundles [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Therefore, there is a lack of studies for hollow deep beams in general, and there is no study in all the literature that investigated the effect of having longitudinal gaps with a slope in all types of RC beams in particular.…”

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Reinforced Concrete Deep Beams with Inclined Circular Holes

Abdulabbas¹,

Ismael²

2022

DJES

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The loads in the deep beams are transmitted diagonally from the load area to the support area by means of the strut and the tie. It is characterized by having a small span to depth ratio. which causes the distribution of stresses to be non-linear within the beam, which motivates researchers to study the effect of the placing of longitudinal hollows and the extent to which these holes affect the behavior and distribution of stresses for these types of beams. In addition to the advantages added by longitudinal hollow to the beam such as reducing weight and passing various electrical and mechanical services...etc. This study investigated the effect of making longitudinal circular holes (with a diameter of 50mm) with a slope on the structural behavior of three deep beams with a solid sample as a reference where the slope used was 0%, 4.3%, and 7.8%. The results showed that making holes reduces the load capacity of the deep beam, a decrease in the failure load was observed by 7.56%, 8.96%, and 11.2% for hollow beams with a slope of 0%, 4.3%, and 7.8%, respectively. Also, the appearance of flexural cracking increased by 2.66%, 2.66%, and 6.66%.and 2.14%, 3.52%, and 7.14%, respectively, for shear cracks. While the effect was small for the neutral axis location as well as for the vertical deflection.

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“…Openings in RC members are often provided for reasons like reducing self-weights, electrical supply lines, water and sewerage lines, computer networks, etc., [ 18 , 19 , 20 , 21 ]. Altun et al [ 22 ] tested nine RC beams with dimensions 200 mm × 200 mm × 3000 mm constructed with classic steel fiber reinforced concrete (CSRC).…”

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Large-Scale Hollow Section RC Beams and Strength Enhancement Using Carbon Fiber Reinforced Polymer (CFRP) Composites

et al. 2021

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An experimental program was conducted to ascertain the efficiency of Carbon Fiber Reinforced Polymer (CFRP) in enhancing the flexural response of hollow section reinforced concrete (RC) beams. Nine beams were tested under four-point bending in three groups. Beams were categorized to reflect the presence or configuration of the CFRP sheet. Each group consisted of three beams: one with a solid section, one with a square 50×50 mm × mm opening and 1 with 100×100 mm × mm opening. Beams in 1st group were tested in as-built conditions. Beams in the 2nd group were strengthened with a single CFRP sheet bonded to their bottom sides. Configuration of CFRP sheet was altered to U-shape applied to the tension side of 3rd group beams. The inclusion of openings, regardless of their size, did not result in degradation of ultimate load and corresponding deflections. However, cracking loads were found to decline as the opening size increased. Regardless of the opening size and CFRP configuration, ultimate loads of beams increased with the application of CFRP. However, this improvement was limited to the debonding and rupture of CFRP in group 2 and 3 beams, respectively. A comparison in the behavior of group 2 and 3 beams revealed that the application of the U-shape CFRP sheet yielded better flexural performance in comparison with the flat-CFRP sheet bonded to the bottom of beams. In the end, In order to further evaluate the economic and performance benefits of these beams, the cost-benefit analysis was also performed. The analysis showed that the feasibility of the hollow section RC beams is more than the solid section RC beams.

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Experimental investigation of the structural behaviours of self-compacted reinforced concrete hollow beams with in-place circular openings

Cited by 5 publications

References 2 publications

Structural Efficiency of Hollow Reinforced Concrete Beams Subjected to Partial Uniformly Distributed Loading

Structural Efficiency of Hollow Reinforced Concrete Beams Subjected to Partial Uniformly Distributed Loading

Structural Behavior of Reinforced Concrete Deep Beams with Inclined Circular Holes

Structural Behavior of Large-Scale Hollow Section RC Beams and Strength Enhancement Using Carbon Fiber Reinforced Polymer (CFRP) Composites

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