Fracture testing of concrete and rock materials

Abstract This paper describes new testing devices in order to measure experimentally the mode-I (direct tensile test), mode-II (direct shear test) and mode-III (direct torsion test) fracture resistance of concrete and rock materials. The proposed testing arrangements are very simple, practical and reliable as well as rigorous from a mechanics point of view. They can be used as routine tests. They provide simple means for evaluating the strength properties of engineering materials under various conditions of loading (temperature, high confining pressure, immersed conditions, etc.) and even in hostile environments. In addition, the versatility of these new types of experimental set-up allows a a ready evaluation of the dilatancy effects on the fracture strengths of concrete and rock materials.

[1]  P. J. F. Wright,et al.  Comments on an indirect tensile test on concrete cylinders , 1955 .

[2]  Hiromichi Yoshikawa,et al.  Analytical Model for Shear Slip of Cracked Concrete , 1989 .

[3]  J. Bernaix.  New laboratory methods of studying the mechanical properties of rocks , 1969 .

[4]  Michael P. Collins,et al.  Predicting Torsional Response of Thin-Walled Open RC Members , 1981 .

[5]  B. Barr,et al.  A TOUGHNESS INDEX TO MEASURE THE ENERGY ABSORPTION OF FIBRE REINFORCED CONCRETE , 1982 .

[6]  Alan H. Mattock.  Cyclic Shear Transfer and Type of Interface , 1981 .

[7]  Steve Millard,et al.  Shear transfer in cracked reinforced concrete , 1985 .

[8]  G. Everling.  Comments upon the definition of shear strength , 1964 .

[9]  Z. Bažant,et al.  ROUGH CRACKS IN REINFORCED CONCRETE , 1980 .

[10]  Zdeněk P. Bažant,et al.  Slip-Dilatancy Model for Cracked Reinforced Concrete , 1980 .

[11]  M. Mellor,et al.  Uniaxial testing in rock mechanics laboratories , 1970 .

[12]  Steve Millard,et al.  Shear transfer across cracks in reinforced concrete due to aggregate interlock and to dowel action , 1984 .

[13]  Nick Barton,et al.  The shear strength of rock and rock joints , 1976 .

[14]  Dusan Krsmanovic,et al.  Shear Strength of Rock Masses And Possibilities of Its Reproduction On Models , 1966 .

[15]  M Truchon,et al.  Fatigue Crack Path Behavior Under Polymodal Fatigue , 1985 .

[16]  B. A. Chappell.  Structural response and rock bolting of a rock mass , 1987 .

[17]  Youjiang Wang,et al.  Toughness determination for fibre reinforced concrete , 1989 .

[18]  Halvard W. Birkeland,et al.  Connections in Precast Concrete Construction , 1966 .

[19]  F. Patton.  Multiple Modes of Shear Failure In Rock , 1966 .

[20]  S. Melin.  When does a crack grow under mode II conditions? , 1986, International Journal of Fracture.