THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD

Huang Yang; Wang Qizhi; Xu Jin

doi:10.13204/j.gyjz200808015

Volume 38 Issue 8

Dec. 2014

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Huang Yang, Wang Qizhi, Xu Jin. THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(8): 54-58. doi: 10.13204/j.gyjz200808015

Citation:

Huang Yang, Wang Qizhi, Xu Jin. THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(8): 54-58. doi: 10.13204/j.gyjz200808015

Huang Yang, Wang Qizhi, Xu Jin. THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(8): 54-58. doi: 10.13204/j.gyjz200808015

Citation:

Huang Yang, Wang Qizhi, Xu Jin. THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(8): 54-58. doi: 10.13204/j.gyjz200808015

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THE SIZE EFFECT LAW OF FRACTURE TOUGHNESS FOR CONCRETE OBTAINED FROM RILEM METHOD

doi: 10.13204/j.gyjz200808015

1.
1. Dept.of Civil Eng.and Applied Mechanics,Sichuan University Chengdu 610065;
2.
2. Dept.of Water Resource,Sichuan University Chengdu 610065

Received Date: 2007-11-14
Publish Date: 2008-08-20

Abstract

Abstract

Geometrically similar three-point bending beams with straight-through crack were prepared for concrete of two compositions.Through MTS 815 material test machine,mechanical parameters of two concretes were tested,and load vs.LPD(load point displacement) curves and load vs.CMOD(crack mouth opening displacement) curves of entire process were recorded for three-point bending specimens.There is a distinct size effect for fracture toughness K_(IC) calculated with maximum load and initial crack length.To cope with this problem,using the size-effect method recommended by RILEM(Runion Internationale des Laboratoires et Experts des Matriaux),the material true fracture toughness and effective length of the fracture process zone were obtained.The size effect law of fracture toughness for the two concrete materials is thus determined respectively.Fracture toughness and fracture process zone length can be seen from this formula for large-sized specimens of the same material.It can also be used to predict the fracture toughness for geometrically similar specimens to be tested in laboratory.
- concrete,
- three-point bending beam,
- fracture toughness,
- fracture process zone,
- size effect law

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References(14)

References

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