Shear Behavior of Reinforced Concrete Beams without Transverse Reinforcement Based on Critical Shear Displacement

AbstractThis paper presents a new concept to evaluate the shear capacity of reinforced concrete beams without shear reinforcement having flexural shear failure. Based on experimental observations, it is proposed that the opening of the critical inclined crack can be considered as the lower bound for the shear capacity of a structural member. It is also proposed that the unstable opening of the critical inclined crack is triggered when the shear displacement in an existing flexural crack reaches a critical value Δcr. Thus the critical shear displacement is used as a failure criterion, and based on that a new shear evaluation method is proposed. The method shows agreeable accuracy when compared with test results in literature.

[1]  Michael P. Collins,et al.  Where is Shear Reinforcement Required? Review of Research Results and Design Procedures , 2008 .

[2]  J. Walraven.  Fundamental Analysis of Aggregate Interlock , 1981 .

[3]  Richard N. White,et al.  Shear-Critical Cracking in Slender Reinforced Concrete Beams , 1999 .

[4]  Zdeněk P. Bažant,et al.  Stability of parallel cracks in solids reinforced by bars , 1980 .

[5]  A. Hillerborg,et al.  Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements , 1976 .

[6]  F. Vecchio,et al.  THE MODIFIED COMPRESSION FIELD THEORY FOR REINFORCED CONCRETE ELEMENTS SUBJECTED TO SHEAR , 1986 .

[7]  Aurelio Muttoni,et al.  Analysis of shear-transfer actions on one-way RC members based on measured cracking pattern and failure kinematics , 2013 .

[8]  J. Walraven,et al.  Die Tragfähigkeit von Betondruckstreben in Fachwerkmodellen am Beispiel von gedrungenen Balken. , 1989 .

[9]  Nguyen Viet Tue,et al.  A new approach to shear design of slender reinforced concrete members without transverse reinforcement , 2016 .

[10]  P E Regan.  RESEARCH ON SHEAR: A BENEFIT TO HUMANITY OR A WASTE OF TIME? , 1993 .

[11]  Zdenek P. Bazant,et al.  Size effect on diagonal shear failure of beams without stirrups , 1991 .

[12]  Evan C. Bentz,et al.  ACI-DAfStb Database of Shear Tests on Slender Reinforced Concrete Beams without Stirrups , 2013 .

[13]  Karl-Heinz Reineck,et al.  Ultimate shear force of structural concrete members Without Transverse Reinforcement Derived From a Mechanical Model (SP-885) , 1991 .

[14]  Antoni Cladera,et al.  Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads , 2014, Frontiers of Structural and Civil Engineering.

[15]  F. Vecchio,et al.  Simplified Modified Compression Field Theory for Calculating Shear Strength of Reinforced Concrete Elements , 2006 .

[16]  Aurelio Muttoni,et al.  Shear Strength of Members without Transverse Reinforcement as Function of Critical Shear Crack Width , 2008 .

[17]  Daniel A. Kuchma,et al.  How Safe Are Our Large, Lightly Reinforced Concrete Beams, Slabs, and Footings? , 1999 .

[18]  Robert J. Frosch,et al.  CONCRETE SHEAR STRENGTH: ANOTHER PERSPECTIVE , 2003 .

[19]  Gert König,et al.  Model uncertainties of design equations for the shear capacity of concrete members without shear reinforcement , 1995 .

[20]  P. S. Chana,et al.  INVESTIGATION OF THE MECHANISM OF SHEAR FAILURE OF REINFORCED CONCRETE BEAMS , 1987 .

[21]  G. N. J. Kani,et al.  HOW SAFE ARE OUR LARGE REINFORCED CONCRETE BEAMS , 1967 .

[22]  James K. Wight,et al.  Strain-Based Shear Strength Model for Slender Beams without Web Reinforcement , 2006 .

[23]  null null,et al.  Recent Approaches to Shear Design of Structural Concrete , 1998 .

[24]  Krishna Naraine,et al.  Model for Cyclic Compressive Behavior of Brick Masonry , 1991 .