Size effect of concrete members applied with flexural compressive stresses

Kim, Jang-Ho Jay; Yi, Seong Tae; Kim, Jin Keun

doi:10.1023/b:frac.0000025300.66782.38

Cited by 23 publications

(10 citation statements)

References 20 publications

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“…As an application of MSEL, some researches (Kim et al, 1999(Kim et al, , 2000(Kim et al, , 2001(Kim et al, , 2004(Kim et al, , 2005Yi et al, 2002) have been performed on unnotched and notched cylindrical specimens subjected to uniaxial compressive force, axially loaded double cantilever beam (DCB), and C-shaped specimens subjected to flexural compression force. In Eq.…”

Section: Application Of Msel On Concrete Compressive Failurementioning

confidence: 99%

Effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete

Yang

Choi

2006

Nuclear Engineering and Design

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241

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Section: Application Of Msel On Concrete Compressive Failurementioning

confidence: 99%

Effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete

Yang

Choi

2006

Nuclear Engineering and Design

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241

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“…As an application of MSEL, some researches [15][16][17]23,24] have been performed on unnotched and notched cylindrical specimens subjected to uniaxial compressive force, axially loaded Double Cantilever Beam, and Cshaped specimens subjected to flexural compression force. Meanwhile, Yi et al [25] reported the research results on the effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete.…”

Section: Application Of Msel To Failures In Concretementioning

confidence: 99%

“…The test procedure on C-shaped concrete specimens subjected to axial load and bending moment was developed by the Portland Cement Association (PCA) [12,13] and at the time formed the basis of the rectangular stress block used in the ACI 318 Code [14]. In addition, the findings of Kim et al [15][16][17] have shown that under flexural compression loading the failure strengths decrease as the sizes (that is, size, length, and depth variations) of the concrete specimens increase. Given that the most widely used flexural member type is an RC beam, it is logical to extend the study of the flexural compressive strength size effect to flexural loaded RC beam members.…”

Section: Introductionmentioning

confidence: 99%

Effect of specimen size on flexural compressive strength of reinforced concrete members

Yi¹,

Kim²,

Kim³

et al. 2007

Cement and Concrete Composites

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“…σθ= Gθ fy (3) In Equation (2) and (3), p is the confining stress from steel tube to core concrete; σθ is the representative transverse stress of steel tube.…”

Section: Lateral Confining Stressmentioning

confidence: 99%

“…Bazant [2] put forward an analytical model of compressive strength of concrete related to component dimensions according to the internal buckling theory, to explain the mechanism of size effect on concrete strength under axial compression. Kim [3] built a half experience and half theory formula of compressive strength of concrete considering size effect based on a large number of test data. Noguchi [4] provided a calculation formula of compressive strength of concrete considering section size, and the strength varied with the change of concrete volume to behave its size effect.…”

Section: Introductionmentioning

confidence: 99%

Size Effect on Confining Force of Circular Concrete Filled in Steel Tube under Axial Compression

Liu¹,

Wang²,

Tang³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Abstract:Size effect is one of the principal mechanical properties of concrete under uniaxial compression. Size effect on compressive strength of concrete has been investigated and provided the corresponding rules of the size effect. However, size effect on confining action on concrete subjected from steel tube has been not sufficiently studied. To fill the gap, size effect on the confining stress of concrete filled in steel tubular under axial compression was discussed. 4 groups of circular short columns of concrete filled in steel tube were conducted under monotonic axial compression. The diameters of the specimens were 219mm, 426mm, 630mm, and 820mm respectively. The ratios of diameter to thickness of the specimens were 88. The grade of concrete was C30. Damage processes of the specimens with different sizes were described. The final failure modes of all specimens were shear failure. Based on the calculation method of steel tube stress derived by Gu's, horizontal and longitudinal strain of steel tube obtained from each measuring point on the specimen during the test was transformed into the corresponding horizontal and longitudinal stress on the surface of steel tube respectively. Then, the average of the steel stress of all measuring points arranged on one specimen was taken to behalf the stress of overall steel pipe in longitudinal and lateral directions. Therefore, the confining stress when the peak load was achieved was obtained based on the average lateral stress of the steel tube. The analysis results indicated that when the peak load was achieved, the ratio of the vertical stress to the yield strength of the steel tube was enlarged with the diameter of the specimen increased; the ratio of the transverse stress to the yield strength of the steel pipe decreased with increment of the diameter of the specimen; the confining force provided by steel tube to the core concrete also reduced with the enlargement of the size of the column. All the variation degree gradually slowed down when the size of the column enlarged. The confinement action to the concrete existed size effect. According to the test results, calculation model of confining force considering the

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Size effect of concrete members applied with flexural compressive stresses

Cited by 23 publications

References 20 publications

Effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete

Effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete

Effect of specimen size on flexural compressive strength of reinforced concrete members

Size Effect on Confining Force of Circular Concrete Filled in Steel Tube under Axial Compression

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