Implications of the size effect method for analyzing the fracture of concrete

Gettu, Ravindra; Saldívar, Héctor; Kazemi, Mohammad Taghi

doi:10.1016/s0020-7683(97)00305-3

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…The Jenq and Shah model (JSM) [123][124][125][126] assumes the presence of a crack, as in the IFM, but the characteristic length is determined by imposing a critical crack opening, assumed as a material property. The crack opening displacement can be expressed as…”

Section: Critical Crack Opening Displacementmentioning

confidence: 99%

Size Effect Law and Critical Distance Theories to Predict the Nominal Strength of Quasibrittle Structures

Maimí¹,

González²,

Gascons³

et al. 2013

Applied Mechanics Reviews

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The design of structures with a nonuniform stress field is of great industrial interest. The ability of the size effect law and critical distance theories to predict the nominal strength of notched and open hole specimens is analyzed in the present paper. The results obtained with these methods are compared with the solution of the problem computed, taking into account the material cohesive law. A conclusion of this paper is that the role of the critical fracture energy in determining the structural strength is negligible, except in large cracked structures. For unnotched structures of any size and for small cracked structures, the key parameter is the initial part of the softening cohesive law. This allows us to define design charts that relate the structural strength to a specimen size normalized with respect to a material characteristic length.

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Section: Critical Crack Opening Displacementmentioning

confidence: 99%

Size Effect Law and Critical Distance Theories to Predict the Nominal Strength of Quasibrittle Structures

Maimí¹,

González²,

Gascons³

et al. 2013

Applied Mechanics Reviews

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“…Experiments involving size effect have been carried out on many materials, such as concrete (e.g. ), mortar (e.g. ), marble (e.g.…”

Section: Introductionmentioning

confidence: 99%

Failure and size effect for notched and unnotched concrete beams

Grégoire

Rojas-Solano

Pijaudier‐Cabot

2013

Num Anal Meth Geomechanics

120

109

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SUMMARYModelling failure in geomaterials, concrete or other quasi-brittle materials and proper accounting for size effect, geometry and boundary effects are still pending issues. Regularised failure models are capable of describing size effect on specimens with a specific geometry, but extrapolations to other geometries are rare, mostly because experimental data presenting size effect for different geometries and for the same material are lacking. Three-point bending fracture tests of geometrically similar notched and unnotched specimens are presented. The experimental results are compared with numerical simulations performed with an integral-type non-local model. Comparisons illustrate the shortcomings of this classical formulation, which fails to describe size effect over the investigated range of geometries and sizes. Finally, experimental results are also compared with the universal size effect law.

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“…al., 2015;. In their respective studies, Hilsdorf and Brameshuber (1991), Gettu et al (1998), Rao and Prasad (2002) reported that as the compressive strength of concrete increases, fracture energy of the concrete increases as well. Gettu et al (1998) observed that when the compressive strength was increased by 160%, the fracture energy increased by 12%.…”

Section: Fracture Mechanics In Concretementioning

confidence: 95%

“…In their respective studies, Hilsdorf and Brameshuber (1991), Gettu et al (1998), Rao and Prasad (2002) reported that as the compressive strength of concrete increases, fracture energy of the concrete increases as well. Gettu et al (1998) observed that when the compressive strength was increased by 160%, the fracture energy increased by 12%. Jensen and Hansen (2001) observed that the fracture energy level of the concrete was dependent on the type of aggregate used and that the fracture energy was independent of the compressive strength of the concrete up to the compressive strength of 50 MPa.…”

Section: Fracture Mechanics In Concretementioning

confidence: 98%

Determination of fracture toughness parameters of concrete using compact pressure test

Tunç¹

2017

Bitlis Eren University Journal of Science and Technology

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A B S T R A C TFractures start with the formation of cracks and occur as the cracks spread in building materials.This causes significant damage to the buildings. Fracture mechanics is a science that investigates crack behavior, crack analysis and what to do for prevention of cracks. In the present study, concrete fracture toughness parameters were investigated by compact pressure test. In this context, research and a series of experiments were conducted on fractures, types of fractures, fracture mechanics, and compact pressure test. In the present empirical study, 5 unnotched and 15 notched, a total of 20 samples were used. 40 mm notches were created on notched samples.Cube splitting experiments were conducted using 10 mm wide strips on unnotched samples. For Type-I, Type-II and Type-III that were used in the calculation of the fracture toughness parameters of the said samples, fracture loads, tensile values and fractured sample details are presented. Since the concrete is a semi-brittle material, compact pressure samples were analyzed according to the principles of linear elastic fracture mechanics. It was concluded that the standard deviation for the critical fracture parameter (KIc) of the sample, which was naturally more stable than the present study, was smaller and as the structure size increased, the fracture toughness value increased as well.

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Implications of the size effect method for analyzing the fracture of concrete

Cited by 16 publications

References 10 publications

Size Effect Law and Critical Distance Theories to Predict the Nominal Strength of Quasibrittle Structures

Size Effect Law and Critical Distance Theories to Predict the Nominal Strength of Quasibrittle Structures

Failure and size effect for notched and unnotched concrete beams

Determination of fracture toughness parameters of concrete using compact pressure test

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