Size effect for high-strength concrete cylinders subjected to axial impact

Krauthammer, Theodor; Elfahal, M.M.; Lim, Jung Yul; Ohno, Tomonori; Beppu, Masatoshi; Markeset, Gro

doi:10.1016/s0734-743x(02)00166-5

Cited by 87 publications

(23 citation statements)

References 3 publications

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“…[15] However, Elfahal et al disagreed with Bindiganavile's claim [16]. It can be seen that the related references [12][13][14][15][16] only contributed to the dynamic compression strength. To the best of our knowledge, the size effect of dynamic tensile strength or fracture toughness has been reported very scarcely in literature.…”

Section: Introductionmentioning

confidence: 99%

“…Applying the recently proposed dynamic quantized fracture mechanics Pugno studied dynamic crack propagation in a sense of root mean square of stress intensity factors considering the effect of both space and time [11]. Elfahal et al studied the size effect on the dynamic compression strength of concrete using the dropweight method, they noted the influence of loading rate to the size effect [12][13][14]. Bindiganavile et al, targeted at Elfahal's work, proposed a dynamic impact factor, which was claimed to "eliminate any rate-effects and thus allow for a true determination of the size effect."…”

Section: Introductionmentioning

confidence: 99%

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Rock Dynamic Fracture Toughness Tested with Holed-Cracked Flattened Brazilian Discs Diametrically Impacted by SHPB and its Size Effect

2009

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Dynamic fracture initiation toughness of marble was tested using two types of the holed-cracked flattened Brazilian disc (HCFBD) specimens, which were diametrically impacted at the flat end of the disc by the split Hopkinson pressure bar (SHPB) of 100 mm diameter. One type of the discs is geometrically similar with different outside diameter of 42 mm, 80 mm, 122 mm and 155 mm respectively, and with crack length being half the diameter; another type of the discs has identical 80 mm diameter and different crack length. Issues associated with determination of the stress wave loading by the SHPB system and the crack initiation time in the disc specimen were resolved using strain gage technique. The stress waves recorded on the bars and the disc failure patterns are shown and explained. The tested dynamic fracture toughness increases obviously with increasing diameter for the geometrically similar HCFBD specimens. It changes moderately for the one-size specimens of identical diameter and different crack length. The size effect of rock dynamic fracture toughness is mainly caused by the fracture process zone length l and fracture incubation time τ, the latter being an additional influencing factor for the dynamic loading as compared with the counterpart static situation. Hence a method is proposed to determine a unique value for the dynamic fracture initiation toughness, the approach takes average of the local distribution and time history for dynamic stress intensity factor in the spatial-temporal domain, which is defined by l and τ jointly. In this way the dynamic size effect is minimized.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rock Dynamic Fracture Toughness Tested with Holed-Cracked Flattened Brazilian Discs Diametrically Impacted by SHPB and its Size Effect

2009

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“…The results revealed the existence of a significant size effect, which was approximately described by the size effect law proposed by Bažant. Krauthammer et al [8] investigated numerically and experimentally the size effect phenomenon of high strength concrete (HSC) for a cylindrical specimens that subject to axial load impact. Results from their tests and simulations showed the existence of a size effect in NSC cylinders under impact loading.…”

Section: Review On Size Effect Of Concrete Structural Elementmentioning

confidence: 99%

Size Effect Study of Sawdust Ash-Concrete under Compressive Load

Marthong¹

2012

IOSRJMCE

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“…Furthermore, there are serious questions about using scaling laws to study breaching and other severe structural responses. A recent study showed that size effects are coupled with loading rate effects to significantly influence material behavior [44][45][46][47], and these findings need to be incorporated into advanced computational tools and design recommendations.…”

Section: Experimental Analysis and Assessmentmentioning

confidence: 99%

A comprehensive R&D Approach for Critical Infrastructure Protection

Krauthammer

2007

Sens Imaging

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This paper provides background on requirements, capabilities and research recommendations for protecting critical infrastructure systems. These activities are needed to develop much more effective solutions to problems that can be currently addressed primarily with conservative, and/or empirical approaches. The expected contributions will have a profound effect on national and international defense and security. Although essential work must be conducted in several important areas, this paper is primarily focused on scientific and technical issues.

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Size effect for high-strength concrete cylinders subjected to axial impact

Cited by 87 publications

References 3 publications

Rock Dynamic Fracture Toughness Tested with Holed-Cracked Flattened Brazilian Discs Diametrically Impacted by SHPB and its Size Effect

Rock Dynamic Fracture Toughness Tested with Holed-Cracked Flattened Brazilian Discs Diametrically Impacted by SHPB and its Size Effect

Size Effect Study of Sawdust Ash-Concrete under Compressive Load

A comprehensive R&D Approach for Critical Infrastructure Protection

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