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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.66 No.5
- 발행연도
- 2018.1
- 수록면
- 569 - 582 (14page)
이용수
초록· 키워드
오류제보하기
Effects of crack separation, bridge area, on the tensile behaviour of concrete are studied experimentally and numerically through the Brazilian tensile test. The physical data obtained from the Brazilian tests are used to calibrate the two-dimensional particle flow code based on discrete element method (DEM). Then some specially designed Brazilian disc specimens containing two parallel cracks are used to perform the physical tests in the laboratory and numerically simulated to make the suitable numerical models to be tested. The experimental and numerical results of the Brazilian disc specimens are compared to conclude the validity and applicability of these models used in this research. Validation of the simulated models can be easily checked with the results of Brazilian tests performed on non-persistent cracked physical models. The Brazilian discs used in this work have a diameter of 54 mm and contain two parallel centred cracks (90° to the horizontal) loaded indirectly under the compressive line loading. The lengths of cracks are considered as; 10 mm, 20 mm, 30 mm and 40 mm, respectively. The visually observed failure process gained through numerical Brazilian tests are found to be very similar to those obtained through the experimental tests. The fracture patterns demonstrated by DEM simulations are mostly affected by the crack separation but the tensile strength of bridge area is related to the fracture pattern and failure mechanism of the testing samples. It has also been shown that when the crack lengths are less than 30 mm, the tensile cracks may initiate from the cracks tips and propagate parallel to loading direction till coalesce with the other cracks tips while when the cracks lengths are more than 30 mm, these tensile cracks may propagate through the intact concrete itself rather than that of the bridge area.
목차
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참고문헌 (55)
참고문헌 신청
Al-Shayea, N.A. / 2005 / Crack propagation trajectories for rocks under mixed mo de I-II fracture / Eng. Geol. 81(1):84~97
Al-Shayea, N.A. / 2000 / Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limes tone roc k formation / Int. J. Rock Mech. Rock Eng. 37(4):629~643
Atkinson, C. / 1982 / Combined mode fracture via the cracked Brazilian disk / Int. J. Fract. 18(4):279~291
Awaji, H. / 1978 / Combined mode fracture toughness measurement by the disk test / J. Eng. Mater. Technol. 100(2):175~182
Ayatollahi, M.R. / 2008 / On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials / Eng. Fract. Mech. 75(16):4631~4641
Al-Shayea, N.A. / 2000 / Effects of confining pressure and temperature on mixed-mode (I-II) fracture toughness of a limes tone roc k formation / Int. J. Rock Mech. Rock Eng. 37(4):629~643
Atkinson, C. / 1982 / Combined mode fracture via the cracked Brazilian disk / Int. J. Fract. 18(4):279~291
Awaji, H. / 1978 / Combined mode fracture toughness measurement by the disk test / J. Eng. Mater. Technol. 100(2):175~182
Ayatollahi, M.R. / 2008 / On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials / Eng. Fract. Mech. 75(16):4631~4641
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