Shear behavior of basalt fiber reinforced polymer (FRP) and hybrid FRP rods as shear resistance members

Wang, Xin; Wang, Zihao; Wu, Zhishen; Cheng, Fang Chao

doi:10.1016/j.conbuildmat.2014.09.104

Cited by 55 publications

(19 citation statements)

References 14 publications

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“…FRP bars/rods are widely used as structural materials in civil engineering, such as for external and internal tendons in reinforced concrete beams and bridge decks [7][8][9][10]. For particular cases, such as bent FRP bars in external pre-stressed tendons, and conventional concrete beams with unbonded/bonded harped FRP internal reinforced tendons, which usually account for stress concentrations [6,[11][12][13], interface, resulting in damage and poor service life [28,30].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Creep Behaviors of Pultruded Unidirectional Carbon/Glass Fiber-Reinforced Hybrid Bars

et al. 2020

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Unidirectional pultruded glass/carbon hybrid fiber-reinforced polymer (HFRP) bars with a diameter of 19 mm have recently been developed for various structural applications. In this study, the creep behavior of HFRP bars caused by bending was experimentally evaluated under different conditions. Our creep study included freeze–thaw preconditioned and unconditioned HFRP bars. The rate of strain and deflection were monitored continuously for a duration of 5000 h. The bars were further tested for creep under the combined effects of mechanical loading and induced thermal cycles, while continuously monitoring the strain rate. Stress levels of 50% to 70% were selected for our creep study. The creep behavior of the bars was analyzed utilizing Findley’s power-law model. On the basis of the linear approximation of Findley’s power law, modulus reductions of approximately 21%, 19%, and 10.75% were calculated for combined freeze–thaw/creep-loaded, freeze–thaw pretreated, and unconditioned HFRP bars, respectively, over a service period of 50 y. The time-dependent deflection of HFRP bars was analyzed by coupling Findley’s power-law model with Euler Bernoulli’s beam theory. The creep deflection intensified by 26.6% and 11.1% for preconditioned and untreated bars, respectively, after a service period of 50 y. The microstructures of HFRP bars was also examined utilizing scanning electron microscopy.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Creep Behaviors of Pultruded Unidirectional Carbon/Glass Fiber-Reinforced Hybrid Bars

et al. 2020

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“…Experimental studies on the compression and bending mechanical properties of FIHPs, which were prepared by using a patented technology [20], short basalt fibers and epoxy resin, were also conducted. With the increasing application of short basalt fiber-reinforced epoxy resin composites (SBFRPs) in industry [21][22][23], the mechanical properties, such as the tensile, compressive, and shear strengths, of FIHP materials have been evaluated more frequently in experimental and theoretical studies, even through finite element analysis methods [24]. Therefore, experimental methods for evaluating the shear mechanics of SBFRPs and FIHPs have been developed in the previous research stage.…”

Section: Introductionmentioning

confidence: 99%

Effect of the length of basalt fibers on the shear mechanical properties of the core structure of biomimetic fully integrated honeycomb plates

Tuo

Chen

et al. 2020

Jnl of Sandwich Structures & Materials

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To promote the application of basalt fibers, this study investigated the effect of different fiber lengths (L f ) of short basalt fibers on the shear mechanical properties of biomimetic fully integrated honeycomb plates, which were manufactured with a short basalt fiberreinforced epoxy resin polymer composite, using a double shear experiment. The results showed that the fully integrated honeycomb plate with an L f of 6 mm had the best mechanical properties, and the shear modulus of the fully integrated honeycomb plate with an L f of 9 mm was close to that of the former. However, the shear strength and energy dissipation capacity of the 9 mm-fiber specimen were worse than those of the 6 mm-fiber specimen, and its energy dissipation capacity was even less than that of the fully integrated honeycomb plate with an L f of 3 mm. The intrinsic mechanism underlying this effect is that the thicknesses of the laminates and honeycomb walls of the fully integrated honeycomb plate are smaller than the lengths of the short fibers, and the corresponding structure is complicated. However, for short basalt fiberreinforced epoxy resin polymers, the larger the L f is, the faster the growth rate of

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“…[1][2][3][4] Having a high tensile strength, light weight, and noncorrosive characteristics, fiber-reinforcement polymer (FRP) reinforcement has presented itself as an excellent alternative to steel reinforcement, particularly, in structures subjected to aggressive environments, such as bridges exposed to deicing salt and marine structures. [5][6][7] FRP composite reinforcing materials consist of fiber reinforcement embedded in a resin matrix. The fibers provide the composite with its unique mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Guidelines for flexural design of FRP reinforced concrete beams

Jnaid¹

2020

Journal of Composite Materials

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This paper investigates the effects of different parameters on the live load carrying capacity of concrete beams reinforced with FRP bars. The author performed a parametric study utilizing an innovative numerical approach to inspect the effects of multiple variables such as reinforcement ratio, concrete compressive strength, span to depth ratio, FRP type, and bar diameter on load carrying capacity of FRP reinforced concrete beams. This study concluded that unless the span to height ratio is smaller than 8, tension-controlled sections are impractical as they do not meet code requirements for serviceability. In addition, it is recommended to use higher reinforcement ratios when using larger span to depth ratios and/or when using CFRP reinforcing bars. Moreover, larger number of bars with small diameter is more practical than fewer large diameter bars. Furthermore, this research suggests that increasing the concrete compressive strength is associated with a significant increase in the ultimate flexural capacity of FRP reinforced beams.

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Shear behavior of basalt fiber reinforced polymer (FRP) and hybrid FRP rods as shear resistance members

Cited by 55 publications

References 14 publications

Experimental Study on the Flexural Creep Behaviors of Pultruded Unidirectional Carbon/Glass Fiber-Reinforced Hybrid Bars

Experimental Study on the Flexural Creep Behaviors of Pultruded Unidirectional Carbon/Glass Fiber-Reinforced Hybrid Bars

Effect of the length of basalt fibers on the shear mechanical properties of the core structure of biomimetic fully integrated honeycomb plates

Guidelines for flexural design of FRP reinforced concrete beams

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