Experimental Study on Compressive Behavior of Concrete Cylinders Confined by a Novel Hybrid Fiber-Reinforced Polymer Spiral

Tang, Yu; Lu, Xiaowan; Wei, Yang; Hou, Shitong

doi:10.3390/polym14214750

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…The mathematical and statistical methods were used to assess the models proposed by previous researchers [22]. The assessment results confirmed the high accuracy of the Lam & Teng model [20,[22][23][24][25][26][27][28][29][30]. Few researchers have investigated the dynamic mechanical performance of concrete confined by FRP [31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 69%

Experimental Study on Dynamic Mechanical Performance of Post-Fire Concrete Confined by CFRP Sheets

Liu,

Huo,

Wang

et al. 2024

Materials

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Impact tests on post-fire concrete confined by Carbon Fiber-Reinforced Polymer/Plastic (CFRP) sheets were carried out by using Split Hopkinson Pressure Bar (SHPB) experimental setup in this paper, with emphasis on the effect of exposed temperatures, CFRP layers and impact velocities. Firstly, according to the measured stress-strain curves, the effects of experiment parameters on concrete dynamic mechanical performance such as compressive strength, ultimate strain and energy absorption are discussed in details. Additionally, temperature caused a softening effect on the compressive strength of concrete specimens, while CFRP confinement and strain rate play a hardening effect, which can lead to the increase in dynamic compressive strength by 1.8 to 3.6 times compared to static conditions. However, their hardening mechanisms and action stages are extremely different. Finally, nine widely accepted Dynamic Increase Factor (DIF) models considering strain rate effect were summarized, and a simplified model evaluating dynamic compressive strength of post-fire concrete confined by CFRP sheets was proposed, which can provide evidence for engineering emergency repair after fire accidents.

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Section: Introductionmentioning

confidence: 69%

Experimental Study on Dynamic Mechanical Performance of Post-Fire Concrete Confined by CFRP Sheets

Liu,

Huo,

Wang

et al. 2024

Materials

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“…It is recommended that in low-strength HFRC, the most effective factor for the enhancement of ductility is CFRP confinement. In another study, 27 non-confined and confined cylinders with spirals of a novel hybrid fiber-reinforced polymer (HFRP) were subjected to axial compressive loading [25]. Spiral types and spiral spacing were two variables in the study.…”

Section: Carbon-frpmentioning

confidence: 99%

“…fiber = 2.6 g/cm3 Density of Carbon fiber = 1.85 g/cm3 Tensile strength of Basalt fiber = 2250 MPa Tensile strength of Carbon fiber = 3000 MPa Elastic modulus of Basalt fiber = 90 GPa Elastic modulus of Carbon fiber = 210 Gpa Ultimate strain of HFRP spiral > ultimate strain of CFRP bar[25] …”

mentioning

confidence: 99%

Review and Assessment of Material, Method, and Predictive Modeling for Fiber-Reinforced Polymer (FRP) Partially Confined Concrete Columns

Ghani,

Ahmad,

Abraha

et al. 2024

Polymers

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The repairing and strengthening of concrete structures using external and internal partial confinements are inevitable in the construction industry due to the new standards and rapid developments. The conventional materials and methods of confinement are unable to meet modern safety and functional standards. The fiber-reinforced polymer (FRP) enhances the strength and ductility of deteriorating and new concrete columns by reducing lateral confinement pressure and resistance against seismic shocks. The precise methods of partial confinement are inevitable for effective FRP-concrete bonding, durability, and cost-effectiveness under different loading conditions and to cope with external environmental factors. Predictive modeling and simulation techniques are pivotal for the optimization of confinement materials and methods by investigating the FRP-concrete novel confinement configurations, stress–strain responses, and failure modes. The novel materials and methods for concrete columns’ partial confinement lack high compressive strength, ductility, chemical attack resistivity, and different fiber orientation impacts. This review provides an overview of recent confinement materials, novel methods, and advanced modeling and simulation techniques with a critical analysis of the research gaps for partial FRP confinement of concrete columns. The current challenges and future prospects are also presented.

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“…With the development of fibre-reinforced polymer (FRP), it was realised that FRP had excellent properties such as high strength, fatigue resistance, and corrosion resistance. In recent years, a lot of research results have been achieved on FRP instead of steel-tube-confined concrete, and the confined specimens all showed significant compressive performance enhancement [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Feng et al [ 22 ] proposed a concept in which a slender steel component was introduced into a mortar-filled FRP tube.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Axial Compression Behaviour of FRP-Confined Concrete-Core-Encased Rebar

Huang

et al. 2023

Polymers

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The axial compression behaviour of fibre-reinforced polymer (FRP)-confined concrete-core-encased rebar (FCCC-R) was investigated by performing monotonic axial compression tests on seven groups of FCCC-R specimens and three groups of pure rebar specimens. The research parameters considered were the FRP winding angle (0°, ±45°, and 90°), number of layers (2, 4, and 6 layers), and slenderness ratio of specimens (15.45, 20, and 22.73). The test results showed that FCCC-R’s axial compression behaviour improved significantly compared with pure rebar. The axial load–displacement curves of the FCCC-R specimens had a second ascending branch, and their carrying capacity and ductility were enhanced substantially. The best buckling behaviour was observed for the FRP winding angle of 90°. The capacity and ductility of the specimens were positively related to the number of FRP-wrapped layers and inversely related to the slenderness ratio of the specimens. A finite element model of FCCC-R was constructed and agreed well with the test results. The finite element model was used for parametric analysis to reveal the effect of the area ratio, FRP confinement length, internal bar eccentricity, and mortar strength on the axial compression behaviour of FCCC-R. The numerical results showed that the area ratio had the most significant impact on the axial compression behaviour of FCCC-R. The confinement length of the FRP pipe and internal bar eccentricity had similar effects on the axial compression behaviour of FCCC-R. Both of them had a significant impact on the second ascending branch, with the post-peak behaviour exhibiting minimal differences. The influence of mortar strength on the axial compression behaviour of FCCC-R was observed to be minimal.

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Experimental Study on Compressive Behavior of Concrete Cylinders Confined by a Novel Hybrid Fiber-Reinforced Polymer Spiral

Cited by 3 publications

References 34 publications

Experimental Study on Dynamic Mechanical Performance of Post-Fire Concrete Confined by CFRP Sheets

Experimental Study on Dynamic Mechanical Performance of Post-Fire Concrete Confined by CFRP Sheets

Review and Assessment of Material, Method, and Predictive Modeling for Fiber-Reinforced Polymer (FRP) Partially Confined Concrete Columns

Experimental and Numerical Investigation of Axial Compression Behaviour of FRP-Confined Concrete-Core-Encased Rebar

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