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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.14 No.3
- 발행연도
- 2020.5
- 수록면
- 375 - 399 (25page)
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초록· 키워드
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The quantificational exploration of the propagation law of fracture process zone (FPZ) is of great importance to the research on concrete fracture. This paper performed fracture experiments on pre-cracked concrete beams under various loading rates. Digital image correlation (DIC) method was applied to obtain the whole field displacement of concrete in the fracture test. The crack opening displacement (COD) and the evolution of FPZ were determined based on the whole field displacement. The results show that the length of FPZ first increases and then decreases with the development of the effective crack length and the maximum length of FPZ is about 60 mm. It can be found that the length of FPZ corresponding to the peak load decreases with the increase of loading rates. Based on the fictitious crack model, a bilinear softening model was established. According to the proposed model, the mechanical behavior and the propagation law of FPZ were analyzed. The bilinear softening model can reflect the microcrack development and the aggregate interlocking in the FPZ.
목차
Abstract
1. Introduction
2. Test Program
3. Fracture Mechanical Properties of Concrete Under Three-Point Bending
4. Fracture Process Zone (FPZ)
5. FPZ Softening Model
6. Conclusions
References
참고문헌 (31)
참고문헌 신청
Chang-Soo Kim / 2018 / Numerical Investigation on Load-carrying Capacity of High-strength Concrete-encased Steel Angle Columns / International Journal of Concrete Structures and Materials 12(1):1~17
Ansari, F. / 1989 / Mechanism of microcrack formation in concrete / ACI Materials Journal 86:459~464
2018 / ASTM C33/C33M-18. (2018). Standard specification for concrete aggregates / ASTM International
Bazant, Z. P. / 1992 / Rate effects and load relaxation in static fracture of concrete / ACI Materials Journal 89(5):456~468
1990 / CEB-FIP model code
Ansari, F. / 1989 / Mechanism of microcrack formation in concrete / ACI Materials Journal 86:459~464
2018 / ASTM C33/C33M-18. (2018). Standard specification for concrete aggregates / ASTM International
Bazant, Z. P. / 1992 / Rate effects and load relaxation in static fracture of concrete / ACI Materials Journal 89(5):456~468
1990 / CEB-FIP model code
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UCI(KEPA) : I410-ECN-0101-2020-532-000682170