Dynamic compressive behavior of concrete confined with unidirectional natural flax FRP based on SHPB tests

Bai, Yu-Lei; Zhou, Yan; Jia, Junfeng; Ozbakkaloglu, Togay; Liu, Yue

doi:10.1016/j.compstruct.2020.113233

Cited by 65 publications

(19 citation statements)

References 58 publications

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“…The reason for the different failure modes could be the smaller confinement stiffness of JFRP than that in this paper, or that the confinement effect in JFRP-wrapped concrete is not as significant as that in JFRP tube-encased concrete used in this paper. For the studies on the compressive behavior of concrete filled with flax FRP tube cylinders, e.g., Bai et al [ 40 ], their failure modes were similar to that of JFRP-confined RAC in this paper.…”

Section: Test Results and Discussionmentioning

confidence: 52%

“…For the weak confinement, the axial stress–strain curves generally consist of two ascending stages followed by one descending stage, and the compressive strength would be reached before the rupture of the jacket. The weak confinement could also be sufficient confinement as long as the axial stress at UP point was larger than the compressive strength of unconfined concrete [ 40 ]. Thus, based on the criteria of confinement level discussed here, it can be concluded that the confinement of JFRP on the RAC and SFRAC was effective, as shown in Figure 7 .…”

Section: Test Results and Discussionmentioning

confidence: 99%

“…Most existing peak axial stress equations were based on the estimated the lateral confining pressure of FRP,

. Most research on FRP-confined concrete has demonstrated that the confinement stiffness of the FRP jacket affects both the strength and the ultimate axial strain of FRP-confined concrete [ 40 ]. It is interesting to note that the confinement stiffness of the FRP jacket also affects the type of stress–strain behavior [ 42 ].…”

Section: Theoretical Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Jute Fiber-Reinforced Polymer Tube-Confined Sisal Fiber-Reinforced Recycled Aggregate Concrete Waste

Gao

Huang

et al. 2022

Polymers

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In this study, the compressive performance of sisal fiber-reinforced recycled aggregate concrete (SFRAC) composite, confined with jute fiber-reinforced polymer (JFRP) tube (the structure was termed as JFRP–SFRAC) was assessed. A total of 36 cylindrical specimens were tested under uniaxial compression. Three major experimental variables were investigated: (1) the compressive strength of concrete core (i.e., 25.0 MPa and 32.5 MPa), (2) jute fiber orientation angle with respect to the hoop direction of a JFRP tube (i.e., β = 0°, 30° and 45°), and (3) the reinforcement of sisal fiber (i.e., 0% and 0.3% by mass of cement). This study revealed that the prefabricated JFRP tube resulted in a significant enhancement of the compressive strength and deformation ability of RAC and SFRAC. The enhancements in strength and ultimate strain of the composite columns were more pronounced for concrete with a higher strength. The strength and ultimate strain of JFRP-confined specimens decreased with an increase in fiber orientation angle β from 0° to 45°. The sisal fiber reinforcement effectively improved the integrity of the RAC and reduced the propagation of cracks in RAC. The stress–strain behaviors of JFRP–RAC and JFRP–SFRAC were predicted by the Lam and Teng’s model with the revised ultimate condition equations.

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Section: Test Results and Discussionmentioning

confidence: 52%

Section: Test Results and Discussionmentioning

confidence: 99%

“…Most existing peak axial stress equations were based on the estimated the lateral confining pressure of FRP,

Section: Theoretical Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Jute Fiber-Reinforced Polymer Tube-Confined Sisal Fiber-Reinforced Recycled Aggregate Concrete Waste

Gao

Huang

et al. 2022

Polymers

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show abstract

“…The macroscopic failure pattern is controlled by its internal mesoscopic structures, such as microcracks, pores, interbeds, joint, and flaws, [35][36][37][38]. Unlike previous studies, since sinusoidal signals may be more representative of stress waves generated during blasting or earthquakes than uniaxial and triaxial loading of rocks [24], in order to better simulate the stress perturbation effects during open-air slope mining, this paper fatigue loads granite containing natural fractures, and cyclic stresses are applied in a sinusoidal pattern. The macroscopic stress-strain curves show that the initial damage degree (i.e., natural fracture volume) has a significant effect on fatigue strength and deformation.…”

Section: Discussionmentioning

confidence: 98%

“…Zhang et al [23] performed rock damage model process analysis (RFPA) simulations and count fractal analysis to investigate the effect of interfracture density on the shear fracture and fractal properties of rock bridges in jointed rocky slopes. Bai et al [24] presented an experimental study of the dynamic compressive behavior of concrete confined with unidirectional natural flax fiberreinforced polymers (FFRPs) under axial impact loading. A new dynamic strength model was also proposed to predict the dynamic compressive strength of FFRP-confined concrete in the studied strain rate range.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Fracture and Energy Evolution Characterization of Naturally Fractured Granite Subjected to Multilevel Cyclic Loads

Guo

Wang

2021

Geofluids

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Naturally fractured rock mass is susceptible to stress disturbance and could result in the stimulation of natural fractures and even serious geological hazards. In this work, multilevel uniaxial fatigue loading experiments were carried out to reveal the fracture and energy evolution of naturally fractured granite using stress-strain descriptions and energy evolution analysis. Results reveal the influence of natural fracture on mechanical properties of granite, regarding the fatigue lifetime, fatigue deformation characteristics, fatigue damage, energy evolution, and fatigue failure pattern. Volumetric and shear processes caused by the sliding and shearing along the natural fracture control the whole failure process. The energy dissipation and release characteristics are strongly impacted by natural fractures. The elastic energy and dissipated energy both decrease with increasing natural fracture volume, growth of the dissipated energy becomes faster for rock near to failure. It is proved that the dissipated energy is mainly used to activate the preexisting natural fractures.

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Dynamic compressive behaviors of polyethylene terephthalate fiber reinforced recycled aggregate concrete

Yan,

Bai,

Chen

2024

Structural Concrete

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Polyethylene terephthalate (PET) fibers are green, environmentally friendly materials. They mainly come from recycled plastic bottles and other products. The addition of PET fibers to recycled aggregate concrete (RAC) has the potential to reduce concrete damage and increase specimen toughness. In this study, the influences of recycled coarse aggregate (RCA) replacement ratio and fiber volume ratio on the impact response of PET fiber reinforced RAC at various strain rates were experimentally investigated. It was found that the compressive strength, critical strain, and toughness grew with the increasing strain rate, followed by the aggravation of the concrete damage. Owing to the strain rate effect, the failure mode of concrete specimen at a high strain rate was different from that under a quasi‐static loading. This led to the reduction of differences in the dynamic compressive strength between the natural and recycled aggregate concrete at a high strain rate. Although the replacement of natural coarse aggregates with RCAs resulted in the decrease in the dynamic compressive strength, it increased the critical strain of the specimen. To reduce the brittleness of concrete materials, flexible fibers, PET fibers were added into the concrete matrix. It was found that the addition of PET fibers increased the critical strain and significantly reduced concrete damage. The empirical equations were proposed to describe the rate‐dependent dynamic compressive strength, critical strain, and toughness based on experimental data.

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Dynamic compressive behavior of concrete confined with unidirectional natural flax FRP based on SHPB tests

Cited by 65 publications

References 58 publications

Jute Fiber-Reinforced Polymer Tube-Confined Sisal Fiber-Reinforced Recycled Aggregate Concrete Waste

Jute Fiber-Reinforced Polymer Tube-Confined Sisal Fiber-Reinforced Recycled Aggregate Concrete Waste

Dynamic Fracture and Energy Evolution Characterization of Naturally Fractured Granite Subjected to Multilevel Cyclic Loads

Dynamic compressive behaviors of polyethylene terephthalate fiber reinforced recycled aggregate concrete

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