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Title |
Flexural Behavior of High-Performance Fiber-Reinforced Cement Composites Considering Strain Softening in Compression
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Authors |
조창근(Chang-Geun Cho) ; 권승희(Seung-Hee Kwon) ; 김형기(Hyeong-Ki Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.4.281 |
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Keywords |
고성능 섬유보강 시멘트 복합재료, 수치해석, 휨 거동, 변형연화, 과잉배근 high-performance fiber-reinforced cement composites, numerical analysis, flexural behavior, strain softening, excessive reinforcement |
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Abstract |
A numerical study was conducted to enhance understanding of the flexural behavior of high-performance fiber-reinforced cement composites (HPFRCC). Based on experimental results, a stress-strain model considering strain softening in compression was adopted. Subsequently, a nonlinear behavior analysis of a flexural beam was performed using this model. The analysis encompassed various reinforcement ratios and strength change conditions. The study confirmed that when HPFRCC has a compressive strength of 120 MPa or more, its structural behavior was not significantly influenced by its compressive strength. Furthermore, it was observed that strain softening in the compression of HPFRCC only occurred under over-reinforced conditions. In practice, this strain softening contributes minimally to the flexural failure behavior of HPFRCC.
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