Effect of longitudinal opening on the structural behavior of reinforced high-strength self-compacted concrete deep beams

el-kassas, Ahmed Ismail; Hassan, Hassan Mohammed; Arab, Mohamed A.

doi:10.1016/j.cscm.2020.e00348

Cited by 18 publications

(10 citation statements)

References 13 publications

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“…Moreover, these beams sustained reduced load carrying capacities and ductility index values. El-Kassas et al [35] experimentally examined the effect of longitudinal openings on the structural behaviours of RC deep beams by varying the location, size, and shape of openings. In general, the load capacity of the beams decreased due to the direct effects of openings.…”

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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“…The absorbed energy is the area below the load-deflection curve. The more increase in absorbed energy values refers to more slab ductile behavior [29][30][31]. In this research, the absorbed energy was calculated for the area under the curve till the ultimate load.…”

Section: Absorbed Energy/toughness Of the Tested Slabsmentioning

confidence: 99%

Flexural Behavior of High Strength Self-Compacted Concrete Slabs Containing Treated and Untreated Geogrid Reinforcement

Fares

Hassan

Arab

2020

Fibers

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Geogrid is as one of the component materials classified under the geosynthetics used for soil stabilizing and reinforcement. Due to its higher strength-to-weight ratio, ease of handling, and comparatively low costs, geogrid has been gradually explored for possible use in concrete reinforcement. This research aims to assess the feasibility of using geogrids as a possible reinforcement for high-strength self-compacted concrete slabs to provide additional tensile strength and ductility. To enhance the bond between geogrid layers and the cement matrix, two types of geogrid surface modification methods are introduced. Gluing sand to the geogrid surface as a physical surface modification method and immersion in polycarboxylate as a chemical surface modification method are investigated. The effect of geogrid type (uniaxial, biaxial and triaxial) and the number of layers is also introduced. The test results show that the chemical treatment increased the ultimate flexural loading capacity of the tested slab by about 8.5% for one geogrid layer and 13% for two geogrid layers compared to untreated specimens. This work was extended to add two geogrid layers in addition to the slab’s steel reinforcement. The results show that adding geogrid decreased the ultimate flexural loading capacity but significantly increased the slab ductility.

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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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Effect of longitudinal opening on the structural behavior of reinforced high-strength self-compacted concrete deep beams

Cited by 18 publications

References 13 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

Flexural Behavior of High Strength Self-Compacted Concrete Slabs Containing Treated and Untreated Geogrid Reinforcement

Structural Behavior of Reinforced Concrete Deep Beams with Inclined Circular Holes

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