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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
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- 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.24 No.6
- 발행연도
- 2019.1
- 수록면
- 527 - 539 (13page)
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In this paper, the fracture characteristics of concrete specimens with different notch depths under three-point flexural loads are studied by finite element and fracture mechanics methods. Firstly, the concrete beams (the size is 700×100×150 mm) with different notch depths (a=30 mm, 45 mm, 60 mm and 75 mm respectively) are tested to study the influence of notch depths on the mechanical properties of concrete. Subsequently, the concrete beams with notch depth of 60 mm are loaded at different loading rates to study the influence of loading rates on the fracture characteristics, and digital image correlation (DIC) is used to monitor the strain nephogram at different loading rates. The test results show that the flexural characteristics of the beams are influenced by notch depths, and the bearing capacity and ductility of the concrete decrease with the increase of notch depths. Moreover, the peak load of concrete beam gradually increases with the increase of loading rate. Then, the fracture energy of the beams is accurately calculated by tail-modeling method and the bilinear softening constitutive model of fracture behavior is determined by using the modified fracture energy. Finally, the bilinear softening constitutive function is embedded into the finite element (FE) model for numerical simulation. Through the comparison of the test results and finite element analysis, the bilinear softening model determined by the tail-modeling method can be used to predict the fracture behavior of concrete beams under different notch depths and loading rates.
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참고문헌 (38)
참고문헌 신청
Abbass, W. / 2013 / Bond behaviour of high-strength concrete flexural member under low cyclic fatigue loading / Fatig. Fract. Eng. Mater. Struct 36(7):602~613
Ali-Ahmad, M. / 2006 / Experimental investigation and fracture analysis of debonding between concrete and FRP sheets / J. Eng. Mech 132(9):914~923
Bažant, Z.P. / 1997 / Fracture and Size Effect in Concrete and Other Quasi-Brittle Materials / CRC Press LLC
Carloni, C. / 2010 / Direct determination of cohesive stress transfer during debonding of FRP from concrete / Compos. Struct 93(1):184~192
Carloni, C. / 2013 / Investigation of sub-critical fatigue crack growth in FRP/concrete cohesive interface using digital image analysis / Compos Part B-Eng 51:35~43
Ali-Ahmad, M. / 2006 / Experimental investigation and fracture analysis of debonding between concrete and FRP sheets / J. Eng. Mech 132(9):914~923
Bažant, Z.P. / 1997 / Fracture and Size Effect in Concrete and Other Quasi-Brittle Materials / CRC Press LLC
Carloni, C. / 2010 / Direct determination of cohesive stress transfer during debonding of FRP from concrete / Compos. Struct 93(1):184~192
Carloni, C. / 2013 / Investigation of sub-critical fatigue crack growth in FRP/concrete cohesive interface using digital image analysis / Compos Part B-Eng 51:35~43
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