Flexural performance of prefabricated U-shaped UHPC permanent formwork–concrete composite beams reinforced with FRP bars

Ge, Wenjie; Zhang, Zhiwen; Ashour, Ashraf; Guan, Zhongwei; Jiang, Hongbo; Sun, Chuanzhi; Qiu, Linfeng; Shan, Yao; Cao, Dafu

doi:10.1007/s43452-023-00644-4

Cited by 5 publications

(1 citation statement)

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“…When this equation is met, the equivalent plastic strain ε pl of the FRP bars accumulatively reaches the equivalent plastic strain of initial damage, where ω D is the state variable; and η is the triaxial stress. η = 1/3 when the FRP bar is under uniaxial tension [24].…”

Section: Sscmentioning

confidence: 99%

Flexural Performance of Steel-Continuous-Fiber Composite Bar and Fiber-Reinforced Polymer Bar Hybrid-Reinforced Sustainable Sea-Sand Concrete Beams: Numerical and Theoretical Study

Wang,

Zhang,

Liu

2024

Sustainability

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To investigate the flexural performance of steel-continuous-fiber composite bar (SFCB) and fiber-reinforced polymer (FRP) bar hybrid-reinforced sea-sand concrete (SSC) beams, a total of 21 SSC beams were numerically studied. The concrete damaged plasticity model (CDPM) and FRP brittle damage model were adopted, and the bond-slip behavior between the reinforcement and concrete was considered. Parametric studies were conducted to study the effects of the SSC strength, sectional steel ratio of the SFCB, core steel bar yield strength of the SFCB, out-wrapped FRP elastic modulus of the SFCB, and the ultimate tensile strength of the SFCB on the flexural performance of the beams. The results indicate that increasing the SSC strength and out-wrapped FRP modulus enhanced the bearing capacity and stiffness but reduced the ductility, shifting failure from concrete crushing to FRP bar fracture. A higher SFCB sectional steel ratio markedly improved the flexural stiffness, transforming the load–deflection curve. Elevated core steel bar yield strength maintained the cracking load and deflection while increasing the yield and ultimate loads. For SFCB fracture, higher ultimate tensile strength in the out-wrapped FRP enhanced the ultimate load and deflection, but not in concrete crushing failure. In addition, three failure modes were defined based on the proper assumption, with the proposed bearing capacity formulas aligning well with the FE results.

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Section: Sscmentioning

confidence: 99%