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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.12 No.7
- 발행연도
- 2018.11
- 수록면
- 1,007 - 1,026 (20page)
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This paper presents an experimental investigation on the stress–strain behavior and the damage mechanism of polypropylene fiber reinforced concrete (PFRC) under monotonic and cyclic compression. Fifty-four specimens for different fiber volume fractions and aspect ratios were tested. Acoustic emission (AE) technique was used to monitor the damage progression. The damage mechanism of concrete was analyzed based on the AE parametric analysis. The results show that the incorporation of polypropylene fiber (PF) has a positive effect on the monotonic and cyclic behaviors of concrete, especially for the post-cracking branch. The toughness and ultimate strain are enhanced and the performance degradation in terms of elastic stiffness and strength is alleviated by the addition of PF. However, PF has little influences on the plastic strain, and the damage process of concrete is mainly driven by the envelope strain. The effect of fiber volume fraction on the cyclic behavior of concrete shows more pronounced than that of aspect ratio. In addition, it is found from AE results that the damage, closely related to AE events, has a quick evolution just after the peak stress, with the AE hits having a concentrated release. The total amount of AE hits increases with increasing fiber volume fraction due to fiber pullout and sliding, while the concrete with fiber aspect ratio of 280 reaches the largest amount. Meanwhile, as substantiated by AE, the failure of PFRC shows an obvious shear mode, with shear cracks dominating the damage progression. Finally, a damage elasto-plastic model is developed to predict the monotonic and cyclic responses of PFRC and the prediction yields a fairly close estimation with experimental results.
목차
Abstract
1 Background
2 Experimental Program
3 Results and Discussion
4 Damage
5 Constitutive Model for PFRC
6 Conclusions
References
참고문헌 (62)
참고문헌 신청
Abbasnia, R., & Ziaadiny, H. (2010). Behavior of concrete prisms confined with FRP composites under axial cyclic compression. Engineering Structures, 32(3), 648?655.
Aggelis, D. G., Soulioti, D. V., Sapouridis, N., Barkoula, N. M., Paipetis, A. S., & Matikas, T. E. (2011). Acoustic emission characterization of the fracture process in fibre reinforced concrete. Construction and Building Materials, 25(11), 4126?4131.
Akca, K. P., Cakir, O., & Ipek, M. (2015). Properties of polypropylene fiber reinforced concrete using recycled aggregates. Construction and Building Materials, 98, 620?630.
Alhozaimy, A. M., Soroushia, P., & Mirza, F. (1996). Mechanical properties of polypropylene fiber reinforced concrete and the effects of Pozzolanic materials. Cement and Concrete Composites, 18(2), 85?92.
Aslani, F., & Nejadi, S. (2013). Self-compacting concrete incorporating steel and polypropylene fibers: Compressive and tensile strengths, moduli of elasticity and rupture, compressive stress?strain curve, and energy dissipated under compression. Composites: Part B, 53, 121?133.
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UCI(KEPA) : I410-ECN-0101-2019-532-000216626