Behavior of high strength self compacted concrete deep beams with web openings

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

doi:10.1016/j.heliyon.2019.e01524

Cited by 24 publications

(12 citation statements)

References 15 publications

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“…The finite element model was able to predict the experimental behavior. Hassan et al [2] studied self-compacted high-strength concrete deep beams with opening. They conducted experimental tests to study the effect of location, size, and shape of opening.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of reinforced concrete deep beam with large opening

Ismail

Issa

Elbadry

2021

Beni-Suef Univ J Basic Appl Sci

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Background A series of nonlinear finite element (FE) analyses was performed to evaluate the different design approaches available in the literature for design of reinforced concrete deep beam with large opening. Three finite element models were developed and analyzed using the computer software ATENA. The three FE models of the deep beams were made for details based on three different design approaches: (Kong, F.K. and Sharp, G.R., Magazine of Concrete Res_30:89-95, 1978), (Mansur, M. A., Design of reinforced concrete beams with web openings, 2006), and Strut and Tie method (STM) as per ACI 318-14 (ACI318 Committee, Building Code Requirements for Structural Concrete (ACI318-14), 2014). Results from the FE analyses were compared with the three approaches to evaluate the effect of different reinforcement details on the structural behavior of transfer deep beam with large opening. Results The service load deflection is the same for the three models. The stiffnesses of the designs of (Mansur, M. A., Design of reinforced concrete beams with web openings, 2006) and STM reduce at a load higher than the ultimate design load while the (Kong, F.K. and Sharp, G.R., Magazine of Concrete Res_30:89-95, 1978) reduces stiffness at a load close to the ultimate design load. The deep beam designed according to (Mansur, M. A., Design of reinforced concrete beams with web openings, 2006) model starts cracking at load higher than the beam designed according to (Kong, F.K. and Sharp, G.R., Magazine of Concrete Res_30:89-95, 1978) method. The deep beam detailed according to (Kong, F.K. and Sharp, G.R., Magazine of Concrete Res_30:89-95, 1978) and (Mansur, M. A., Design of reinforced concrete beams with web openings, 2006) failed due to extensive shear cracks. The specimen detailed according to STM restores its capacity after initial failure. The three models satisfy the deflection limit. Conclusion It is found that the three design approaches give sufficient ultimate load capacity. The amount of reinforcement given by both (Mansur, M. A., Design of reinforced concrete beams with web openings, 2006) and (Kong, F.K. and Sharp, G.R., Magazine of Concrete Res_30:89-95, 1978) is the same. The reinforcement used by the STM method is higher than the other two methods. Additional reinforcement is needed to limit the crack widths. (Mansur, M. A., Design of reinforced concrete beams with web openings, (2006)) method gives lesser steel reinforcement requirement and higher failure load compared to the other two methods.

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Section: Introductionmentioning

confidence: 99%

“…They conducted experimental tests to study the effect of location, size, and shape of opening. Hassan et al [2] commented on crack patterns, absorbed energy, and deflection. Yang et al [3] analytically and experimentally evaluated the influence of web openings in reinforced concrete deep beams.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of reinforced concrete deep beam with large opening

Ismail

Issa

Elbadry

2021

Beni-Suef Univ J Basic Appl Sci

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“…Nowadays, self-compacted concrete (SCC) is known to be a commonly used building material that has been developed to satisfy the engineer's demand for more workable concrete. SCC is used to promote and ensure proper filing and good structural efficiency for extremely congested reinforced structural members or thin members [19][20][21][22][23]. Geogrid makes it easier to build because it can be installed under any climatic conditions and enables an inappropriate soil to be better prepared for construction requirements, thereby, making it more valuable [1,5].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Creating openings in the shear RC deep beams is frequently required to pass the utility services. Numerous studies have been conducted on the behavior of RC deep beams with openings [5][6][7][8][9][10][11][12][13][14]. The openings reduce the shear capacity of RC deep beams and this reduction depend on the degree of interruption of the opening to the load path from the load point to the support point.…”

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confidence: 99%

Behavior of Concrete Deep Beam Reinforced with Inclined Web Reinforcement around Different Opening Shapes

Abdel-Kareem

El-Azab

2019

AIR

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The objective of this paper is to experimentally and analytically estimate the influence of inclined reinforcement placed above and below web openings having different shapes in reinforced concrete (RC) deep beam. Twenty RC deep beams had the same overall geometric dimensions were tested under two-point top loading. Test variables included amount of inclined reinforcement, opening shape (circular, square, rectangular and relatively new type rectangular with fillet edges) and shear span-to-depth ratio. The relationship between the amount of inclined reinforcement and the opening size was expressed as the effective inclined reinforcement factor. As this factor was increased, the behavior of tested beams improved, where the crack width and its development decreased, and the ultimate load increased. The improvement rate of ultimate load with increasing effective inclined reinforcement for beams with rectangular openings having fillet edges was higher than that with sharp edges. Beams with opening having square, circular, or rectangular with fillet edges shapes and having effective inclined reinforcement ratio above 0.085 and 0.091 under shear span-to-depth ratio 1.0 and 0.6, respectively had higher ultimate load than that of corresponding solid beams. The effect of inclined reinforcement on enhancing the behavior of deep beam with opening increased as the shear span-to-depth ratio decreased. The ultimate load of tested beams was estimated using upper-bound analysis of the plasticity theory and compared with the test results. It is shown that the prediction has a consistent agreement with the experimental results.

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Behavior of high strength self compacted concrete deep beams with web openings

Cited by 24 publications

References 15 publications

Finite element analysis of reinforced concrete deep beam with large opening

Finite element analysis of reinforced concrete deep beam with large opening

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

Behavior of Concrete Deep Beam Reinforced with Inclined Web Reinforcement around Different Opening Shapes

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