Effect of pre-damage on compressive properties of circular RC columns repaired with BFRP composites: Testing and modeling

Ma, Gao; Chen, Xiaohuang; Yan, Libo; Hwang, Hyeon‐Jong

doi:10.1016/j.compstruct.2020.112483

Cited by 19 publications

(1 citation statement)

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“…In addition, studies have also evaluated the effectiveness of FRP-confined concrete under different conditions in terms of compressive strength, strain change, initial elastic modulus, and strain hardening modulus. Tijani et al 13 , 14 found that the repairability of FRP-confined concrete decreased with the increase of the damage degree through FRP repairing experiments on initial damaged concrete. Ma et al 15 studied the effect of FRP-confined concrete columns' initial damage and believed that the damage degree had a negligible effect on the ultimate strength and a significant effect on the lateral and longitudinal strain.…”

Section: Introductionmentioning

confidence: 99%

Sulfate erosion investigation on FRP-confined concrete in cold region

Zou

2022

Sci Rep

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Fiber-reinforced polymer (FRP) confined concrete is regarded as an innovative and economical approach for structural repairation. Two typical materials [carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP)] are selected in this study to investigate the concrete strengthen effect in a severe environment. The resist ability of FRP-confined concrete is discussed when subjected to coupled erosion between sulfate erosion and freeze–thaw cycles. Electron microscopy examines concrete's surface and interior degradation during coupled erosion. The corrosion degree and principle of sodium sulfate are analyzed using pH, SEM electron microscope, and EDS energy spectrum. The axial compressive strength test is used to evaluate the reinforcement of the FRP-confined concrete column, and the stress–strain relationship for various FRP-confined techniques in a coupled erosion environment is obtained. The error analysis is performed to calibrate the experimental test result using four existed prediction models. All observations indicate that the deterioration process of FRP-confined concrete is complicated and dynamic under coupled effect. Sodium sulfate initially increases the initial strength of concrete. However, subsequent freeze–thaw cycles may aggravate concrete fractures, while sodium sulfate further degrades the strength of concrete through the cracking development. A precise numerical model is presented to simulate the stress–strain relationship, which is critical for the design and life cycle assessment of FRP-confined concrete.

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Section: Introductionmentioning

confidence: 99%