Rate-dependent compressive behavior of concrete confined with Large-Rupture-Strain (LRS) FRP

Zhou, Yan; Bai, Yu-Lei; Ozbakkaloglu, Togay; Gao, Wan-Yang; Zeng, Jun-Jie

doi:10.1016/j.compstruct.2021.114199

Cited by 40 publications

(3 citation statements)

References 46 publications

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“…In marine environments where high-strain impact loads are prevalent, comprehensive consideration of their dynamic effects on concrete structures is imperative. The dynamic splitting tensile properties play a pivotal role in particular [9][10][11]. Against this engineering backdrop, the development of concrete with the dynamic splitting properties holds great significance for advancing marine engineering.…”

Section: Introductionmentioning

confidence: 99%

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

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In marine structural engineering, the impact resistance of concrete holds high significance. The determination of whether the combined use of expansion agent (EA) and glass fiber (GF) has a synergistic effect on the impact resistance of seawater–sea-sand concrete (SSC) and plays a role in its performance and application. In this study, the dynamic Brazilian disc test at various strain rates was carried out with an SHPB device to investigate the effect of mixing 0% and 6% EA with 0% and 1% GF on the dynamic splitting tensile properties of SSC. The results show that strain rate effect on EA and GF-reinforced SSC during dynamic splitting tensile tests at higher strain rates, indicating strong strain rate sensitivity. The synergistic reinforcement of EA and GF consumed more energy under impact loading, thus maintaining the morphological integrity of concrete. However, the dynamic splitting tensile strength obtained in the Brazilian disc test had a significant overload effect which cannot be ignored. EA doped at 6% and GF doped at 1% showed a synergistic enhancement of SSC’s dynamic splitting tensile properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

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“…Among all the FRP bars, BFRP bars were used in this study because they are costeffective and result in low pollution during manufacture [38,39]. In this study, we focused on the combination of FRP bars and concrete prepared with seawater sea sand, and especially on the effect of rib geometry (RW, DW, and RH of the ribbed bars) and concrete strength on the bond behavior (failure modes of the bond interface, bond stress-slip curves, and bond indexes) of the bonds between fiber-wrapped ribbed BFRP bars and SSC.…”

Section: Introductionmentioning

confidence: 99%

Bond Performance between Fiber-Wrapped Ribbed Basalt Fiber-Reinforced Polymer Bars and Seawater Sea-Sand Concrete

Lin,

Weng,

Xiao

et al. 2023

Buildings

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The high corrosion resistance of fiber-reinforced polymers (FRPs) and related concrete structures means that they are suitable for application in the marine environment. Therefore, the replacement of steel bars with fiber-reinforced polymer (FRP) bars enhances corrosion resistance in seawater sea-sand concrete (SSC) structures. Geometric parameters significantly influence the performance of the bond between ribbed FRP bars and SSC, thereby affecting the mechanical properties of the concrete structures. In this study, the performance of the bond between ribbed (i.e., with fiber wrapping) basalt-fiber-reinforced polymer (BFRP) bars and SSC was investigated through pull-out tests that considered rib geometry and SSC strength. The results demonstrated that an increase in rib and dent widths reduced the bond stiffness, while an increase in rib height and SSC strength gradually increased the bond stiffness and strength. Additionally, the bond stiffness and bond strength were relatively low because the surface fiber bundles buffered the mechanical interlocking force between the BFRP ribs and the concrete, resulting in plastic bond failure during the loading process. Furthermore, the adhesion of the fiber bundles to the surface of the BFRP bars also influenced bond performance, with higher adhesion leading to greater bond stiffness and strength.

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“…The success of FRP confinement is mainly related to the excellent properties of FRP composites, including high tensile strength, corrosion resistance, lightweight, and easy application (Jiang and Teng, 2013;Bai et al, 2021). Extensive research on FRP-confined concrete columns has led to a good understanding of the axial compressive behavior and the related concrete confinement models (Xiao and Wu, 2000;Ilki et al, 2008;Yu et al, 2010a;Yu et al, 2010b;De Luca et al, 2010;Dai et al, 2011;Ozbakkaloglu et al, 2013;Zhou et al, 2016;Bai et al, 2017;Lin and Teng, 2017;Ouyang et al, 2017;Wang et al, 2017;Zeng et al, 2017;Zeng et al, 2018;Guo et al, 2019;Zeng et al, 2020a;Zeng et al, 2020b;Zeng et al, 2020c;Lin and Teng, 2020;Yan et al, 2021;Zeng et al, 2021). It is well known that the failure mode of FRP-confined concrete cylinders is usually dominated by the tensile rupture of the FRP jackets in the hoop direction.…”

Section: Introductionmentioning

confidence: 99%

Effective Strain of BFRP for Confined Heat-Damaged Concrete Cylinders

et al. 2021

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It is widely accepted that concrete columns confined with fiber-reinforced polymer (FRP) jackets exhibit significant increases in strength and ductility with reference to the unconfined case. Existing experimental studies have indicated that the hoop rupture strains measured in the FRP jackets are significantly lower than the material strain capacity determined by the flat coupon tensile tests. An FRP efficiency factor is then usually used to define the ratio of the average hoop rupture strain to the material strain capacity of the FRP jackets, which governs the lateral FRP confinement as well as the peak strength and ultimate strain of the FRP-confined concrete under axial compression. FRP jackets are also expected to be a promising solution to repair damaged RC columns after fire exposure. However, there is lacking research on the behavior of FRP-confined fire or heat-damaged concrete columns. In particular, the FRP efficiency factor of FRP-confined fire or heat-damaged concrete columns has not yet been established. The study presents the results of an experimental study aimed to investigate the effects of the historical high temperature and the layer of basalt FRP (BFRP) jackets on the efficiency factor of BFRP for the confined heat-damaged concrete cylinders. A sum of 51 standard concrete cylinders is prepared and tested under axial compression. The parameters varied between tests are the historical high temperature (200°C, 400°C, 600°C, or 800°C) that is used to produce the heat damage of concrete cylinders and the number of layers of BFRP jackets (2, 3, or 4). The test results have indicated that the efficiency factor of BFRP jackets increases with the historical high temperature but decreases slightly with the increase in the BFRP layers. A new temperature-dependent design equation for the BFRP efficiency factor of the confined heat-damaged concrete is proposed to consider the effects of the parameters mentioned above and can be used for practical design.

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Rate-dependent compressive behavior of concrete confined with Large-Rupture-Strain (LRS) FRP

Cited by 40 publications

References 46 publications

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Bond Performance between Fiber-Wrapped Ribbed Basalt Fiber-Reinforced Polymer Bars and Seawater Sea-Sand Concrete

Effective Strain of BFRP for Confined Heat-Damaged Concrete Cylinders

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