Flexural behavior of rebar truss stiffened cold-formed U-shaped steel-concrete composite beams

Liu, Jiepeng; Zhao, Yi; Chen, Yohchia Frank; Xu, Sheng; Yang, Yalian

doi:10.1016/j.jcsr.2018.08.011

Cited by 43 publications

(9 citation statements)

References 14 publications

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“…It has good bending bearing capacity and ductility, as well as good construction convenience, fire resistance and economic performance. Liu Jiepeng et al (2018, 2019), Zhao Yi et al (2019), Xiao et al (2005) et al proposed the design method of shear connection, bearing capacity and stiffness of UCB through a series of experimental research and theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

Negative bending capacity of web-embedded U-shaped steel-concrete composite beams

Yang

Nie

et al. 2023

Advances in Structural Engineering

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This paper discusses the negative bending behavior of a new type of web-embedded U-shaped steel-concrete composite beams (WUSCBs). Considering the effective width of the concrete slab, a negative bending moment test was performed on eight WUSCB specimens. The web-embedded shear connector in the WUSCB has been shown to have good shear connection performance and maintain the overall function of the WUSCB. The failure process of the specimen was categorized by the cracking, yielding, and buckling loads which correspond to 0.29 Pu, 0.79 Pu, and 0.90 Pu, respectively. Negative bending failure was observed in the WUSCB, evidenced by the steel plate yielding and concrete slab cracking. The WUSCB was found to have good ductility and deformability under negative bending. A finite element model was established to verify with the experimental results. The calculation method for negative bending capacity is proposed; and the calculation results are in good agreement with the test results.

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Section: Introductionmentioning

confidence: 99%

Negative bending capacity of web-embedded U-shaped steel-concrete composite beams

Yang

Nie

et al. 2023

Advances in Structural Engineering

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“…Based on the results of the parametric study, an analytical formula for calculating the force transfer capacity of the shear connector was developed. For the varus-type top flange USCCB, Zhou's research group investigated the flexural behavior [21,22], shear behavior [23], and torsional behavior [24] of a novel cold-formed U-shaped steel-concrete composite beam constituted using a truss-type and inverted U-shaped reinforcement bar system.…”

Section: Introductionmentioning

confidence: 99%

Analysis of flexural capacity of a novel straight-side U-shaped steel-encased concrete composite beam

Yan

Zhang

Jin

et al. 2021

Engineering Structures

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This paper proposes a novel straight-side U-shaped steel-encased concrete composite beam (SUSCCB). The SUSCCB is constituted by encasing the top sections of the U-shaped steel plates directly into the concrete flange, with the composite action generated through perfobond connections consisting of reinforcement bars transversely passing through perforations in the encased top sections of the steel plates. It is engineered to overcome the shortcomings of the existing varus or valgus U-shaped steel-encased concrete composite beams (USCCB), for which the installation of shear connectors can be complex and costly to achieve because of the numerous required welds. The main objective of this paper is to study the flexural behavior of the proposed SUSCCB and develop a method for calculating its flexural capacity. A finite element model (FEM) is developed and validated against available USCCB experimental results. After, the validated FEM is used to conduct a parametric study of the SUSCCB. The flexural behavior is assessed from the strain distribution, stress analysis, and load-deflection curves. Results show that the flexural performance of the SUSCCB is superior to that of a traditional USCCB, and that its flexural capacity can be calculated through the simplified plastic theory. Lastly, the analytical flexural capacity of the SUSCCB is derived. The analytical values show close agreement with results from the numerical simulations.

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“…us, several forms of shear connectors have been reported for enhancing the flexural behavior or eliminating the constitution difficulty of composite beams [14][15][16][17][18][19][20][21][22]. Park et al [14,15] used diagonal rebars and welded rebar connections to strengthen the beam-column joints.…”

Section: Introductionmentioning

confidence: 99%

“…Ductile failure mode and high strength were observed with all specimens, and the depth of U-shaped girder was found to be the most sensitive affecting parameter on the flexural behavior of the composite beams. Zhou et al [20] and Liu et al [21] discussed the flexural behavior of the rebar truss stiffened cold-formed U-shaped steel-concrete composite beams, in which the interface between the concrete slab and U-shaped girder was enhanced with inverted U-shaped rebars. rough experimental results, the midspan deflection of the composite beams can reach up to L 0 / 20, reflecting a good deformability.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Performance of U‐Shaped Steel‐Encased Concrete Composite Beam‐Girder Joints

Wang

et al. 2021

Advances in Civil Engineering

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This paper proposes a novel U-shaped steel-encased concrete composite beam-girder joint (referred to herein as the novel composite beam-girder joint), in which the U-shaped beams at two sides (L and R) are inserted into a shaped sleeve, and the U-shaped girder and two U-shaped beams are connected by the shaped sleeve through welding. Compared with the traditional beam-girder joints, the novel composite beam-girder joints take advantage of easy construction, light weight, and short construction period. The failure patterns, load-strain and load-deflection curves, and strain distributions of the novel composite beam-girder joints were investigated through the static loading tests on two full-scale specimens, denoted as GBJ1 and GBJ2. The two specimens were varied in beam section reinforcements. Specimen GBJ2 was equipped with 3Ф16 additional bars in the U-shaped beams based on Specimen GBJ1. Test results show that the two specimens failed as the through arc cracks developed at the concrete slab interfaces. The additional bars can increase the bearing capacity slightly but will also increase the stress concentration on the bottom flange of the shaped sleeve, leading to the decrease of ductility for Specimen GBJ2. The slab effect is considered in the test and can thus reflect the actual stress state of the beam-girder joints well. This study can provide a reference for the design and application of beam-girder joints.

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Flexural behavior of rebar truss stiffened cold-formed U-shaped steel-concrete composite beams

Cited by 43 publications

References 14 publications

Negative bending capacity of web-embedded U-shaped steel-concrete composite beams

Negative bending capacity of web-embedded U-shaped steel-concrete composite beams

Analysis of flexural capacity of a novel straight-side U-shaped steel-encased concrete composite beam

Experimental Study on Mechanical Performance of U‐Shaped Steel‐Encased Concrete Composite Beam‐Girder Joints

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