Test on pure torsion behavior of channel steel reinforced concrete beams

Zhang, Xin; Xue, Jianyang; Rui, R.; Ma, Linlin

doi:10.1016/j.jobe.2021.102967

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…This mode of failure, as shown in Figure 5, began by developing inclined cracks in the side of beams with an angle of inclination of about 40°, which started from the bottom toward of top of specimens in one side and vice-versa in the other side. The developed crack patterns in the tested SCSSB specimens are approximately similar to those observed in previous studies considering the torsional behavior of traditional reinforced concrete beams, where the initial cracks were developed as inclined rings around the tested beams [28][29][30]. However, the presence of steel skin plate delayed the cracks from developing at the bottom or top face of the tested specimens at the first stages of the applied loading.…”

Section: Failure Modes and Torsional Strengthsupporting

confidence: 83%

Torsional Behavior of Steel-Concrete-Steel Sandwich Beams with Welded Stirrups as Shear Connectors

et al. 2023

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The structural performance of a steel-concrete-steel sandwich beam (SCSSB) with welded stirrups to the steel skin plates as shear connections exposed to a pure torsion load was studied in this paper. Eight SCSSB specimens were fabricated and tested under pure torsion. The effects of the compressive strength of the concrete core, 26 and 35 MPa, the thickness of the top and bottom steel skin plates, 2 and 4 mm, and the degree of shear interaction, which represents the number of beam stirrups, between the steel skin plates and the concrete core are 75, 100, and 125%. The experiment beams revealed a similar mode of failure for all SCSSB specimens regarding all considered variables, which started with inclined cracks along the specimens’ side faces and ended with local separation between one of the steel skin plates (top or bottom) and the concrete core. In addition, the experiment results showed an increase in the torsional strength with the increase in the shear connection ratio and the thickness of the steel skin plate, as well as with the increase in the strength of the concrete core. However, it was observed that the torsional ductility of the tested beams is proportional directly to the steel skin plate thickness and degree of interaction and inversely with the concrete compressive strength. The results showed that the use of steel skin plates with welded stirrups as a shear connection could reduce the negative effect of increasing the compressive strength of the concrete core on the torsional ductility of SCSSB. Doi: 10.28991/CEJ-2023-09-01-016 Full Text: PDF

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Section: Failure Modes and Torsional Strengthsupporting

confidence: 83%

Torsional Behavior of Steel-Concrete-Steel Sandwich Beams with Welded Stirrups as Shear Connectors

et al. 2023

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“…Furthermore, Kim et al [8] carried out experimental studies on reinforced concrete members, showing that pure torsional behavior is dependent on cross-sectional properties and the amount of torsional reinforcement. Later, Xin et al [9] declared that the torsional ductility of channel steel reinforced concrete beams is higher than that of reinforced concrete beams. In addition, Ren et al [10] investigated the effect of large-diameter stiffened steel tubes used in wind turbines under combined compression-bendingtorsion loads with experimental and the finite element method (FEM).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Steel I-Beams Strengthened Using CFRP and BFRP Sheets under Torsion

Aydın

2023

Advances in Civil Engineering

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Torsional demand acting on beams can significantly effect structural behavior and cause high-local stresses. The torsional resistance of beams can be potentially increased by using fiber-reinforced polymer (FRP) sheets. In this study, basalt (BFRP) and carbon (CFRP) fabrics with different layouts are used to strength the steel I-beams, and the enhancement in the torsional strength is investigated experimentally and numerically. First, 12 specimens are reinforced using BFRP and CFRP fabrics bonded to the web of steel I-beams in three different layouts to carry out the experimental study. In total, 14 specimens are tested under torsion including two reference beams. Second, a numerical model is developed to capture the torsional behavior of web-reinforced steel beams. After the numerical model is verified satisfactorily, a parametric study is conducted to evaluate the effect of FRP strengthening on steel beams for flange-only and full reinforcement alternatives. In the experiments, fully web-bonded FRP strengthening configuration achieved 18% and 14% increase in torsional capacities for BFRP and CFRP sheets compared to reference, respectively. In last, it is discovered by the parametric study that the full reinforcement using FRP on the web and flanges can achieve up to 43% increase.

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“…The torsional stiffness and strength are increased with the increase of the transverse torsional reinforcement. Xin et al [11] studied a composite section consisting of two steel channels positioned at the upper and lower layers of the beam and their web was parallel to the horizontal axis. After cracking, a sharp decrease in the torsional stiffness was observed [11].…”

Section: Introductionmentioning

confidence: 99%

“…Xin et al [11] studied a composite section consisting of two steel channels positioned at the upper and lower layers of the beam and their web was parallel to the horizontal axis. After cracking, a sharp decrease in the torsional stiffness was observed [11]. The torsional behavior is influenced by the concrete strength, shape of stirrups, and the angle of steel lacing which connects the two channels [11].…”

Section: Introductionmentioning

confidence: 99%

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Torsion Behavior of Recycled Aggregates Concrete Beams With Openings

Osman

Shawky

Abdalla

2022

Journal of International Society for Science and Engineering

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Due to the fast rise in material and transportation costs, the recycling of construction waste has become a critical operation in the construction industry. Therefore, the use of construction waste as coarse aggregate should be researched to ensure that the structural behavior of these structures does not differ from that of non-recycled (natural) coarse aggregate buildings (NCA). An experimental investigation was conducted in this study to explore the influence of recycled coarse aggregate (RCA) on reinforced concrete beams with opening and subjected to pure torsion. Six beams with identical cross-sectional dimensions of 150 x 350 mm and a total span of 1400 mm attached monolithically at the two ends by two cantilevers having 200 mm wide and 350 mm long are included in the investigation. The tested beams included two solid beams and four beams with 300 x 150 mm opening. The existence of opening and the ratio of RCA replacement were considered as the parameters in this investigation. From the results of this study, the crack patterns of RCA and NCA specimens were similar, and the increase of RCA replacement ratio led to a decrease in the cracking and ultimate capacities. The existence of an opening changed the failure mode from sudden torsional shear failure as in the reference specimen without opening to crushing of concrete and concrete cover separation. A comparison between the experimental outcomes, the ACI code, and the ECP-203 code was conducted, and showed a good agreement with the experimental results.

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Test on pure torsion behavior of channel steel reinforced concrete beams

Cited by 10 publications

References 24 publications

Torsional Behavior of Steel-Concrete-Steel Sandwich Beams with Welded Stirrups as Shear Connectors

Torsional Behavior of Steel-Concrete-Steel Sandwich Beams with Welded Stirrups as Shear Connectors

Investigation of Steel I-Beams Strengthened Using CFRP and BFRP Sheets under Torsion

Torsion Behavior of Recycled Aggregates Concrete Beams With Openings

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