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Effects of Crack Velocity on Fracture Resistance of Concrete
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 Title & Authors
Effects of Crack Velocity on Fracture Resistance of Concrete
Yon, Jung-Heum;
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 Abstract
Tests of concrete CLWL-DCB specimens had been conducted with displacement-controlled dynamic loading. The crack velocities for 381mm crack extension were 0.80 mm/sec ~ 215m/sec. The external work and the kinetic and strain energies were derived from the measured external load and load-point displacement. The fracture resistance of a running crack was calculated from the fitted curves of the fracture energy required for the tests. The standard error of the fracture energy was less than 3.2%. The increasing rate of the fracture resistance for 28 mm initial crack extension or micro-cracking was relatively small, and then the slope of the fracture resistance increased to the maximum value at 90∼145 mm crack extension depending on crack velocity. The maximum fracture resistance remained for 185 mm crack extension, and then the faster crack velocity showed the faster decreasing rate of the maximum fracture resistance. The maximum fracture resistance increased proportionally to the logarithm of the crack velocity from 142 N/m to 217 N/m when the crack velocity was faster than 0.273 m/sec. The maximum fracture resistance of the fastest tests was similar to the average fracture energy density of 215 N/m. To measure the fracture resistance of concrete, the stable crack extension should be larger than 90∼145 mm depending on crack velocity.
 Keywords
concrete;CLWL-DCB specimen;fracture behavior;crack velocity;fracture resistance;
 Language
Korean
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 References
1.
Yon, J.-H., Hawkins, N. M., and Kobayashi, A. S.'Strain-Rate Sensitivity of Concrete Mechanical Properties,' Materials Joural, ACI, Vol.89, No.2, 1992, pp. 146-153

2.
Mindess, S., and Shah, S. P. editors, Cement-Based Composites: Strain Rate Effects on Fracture, Materials Research Society, Pittsburgh, Pennsylvania, 1985, pp.270

3.
Yon, J.-H., Hawkins, N. M., and Kobayashi, A. S.,'Numerical Simulation of Mode I Dynamic Fracture of Concrete,' Journal of Engineering Mechanics, ASCE, Vol. 117, 1991, pp.1595-1610 crossref(new window)

4.
Yon, J.-H., Hawkins, N. M., and Kobayashi, A. S., 'Comparisons of Concrete Fracture Models,'Journal of Engineering Mechanics, ASCE, Vol. 123, No. 3, 1997, pp.196-203 crossref(new window)

5.
연정흠, '콘크리트 CLWL-DCB 시험편의 저항곡선,' 한국콘크리트학회 논문집, 14권,3호, 2002, pp. 357-364

6.
연정흠, '콘크리트 삼점휨 시험편의 성장하는 균열에 대한 저항곡선,' 한국콘크리트학회 논문집, 제13권, 6호, 2001, pp.568-574

7.
Clough, R. W., Dynamics of Structures, McGraw Hill, New York, 1975, pp.634

8.
Li, Z. 'Microcrack Characterization in Concrete under Uniaxial Tension,' Magazine of Concrete Research, Vol. 48, No. 176, 1996, pp.219-228 crossref(new window)

9.
Krstulovic-Opara, N. 'Fracture Process Zone Presence and Behavior in Mortar Specimens,' Materials journal, ACI, Vol.90, 1993, 618-626

10.
연정흠, '콘크리트 삼점휨 시험편의 동적 파괴거동,' 한국콘크리트학회 논문집,14권,5호, 2002, pp.689-697