THE INVESTIGATION OF EFFECT OF STEEL FIBER ON THE
SHEAR BEHAVIOR OF SELF COMPACTING CONCRETE
BEAMS WITH NORMAL AND HIGH STRENGTH
33rd Our World in Concrete and Structures (OWICs) - 2008
H A Beygi*, Babol University of Technology, Iran
J Vaseghi Amiri, Babol University of Technology, Iran
A Rezai Moazen, Allameh Mohades Noori Higher Education Institute, Iran
N Ranjbar Malidareh, Babol University of Technology, Iran
M Harajpoor, Mazandaran University of Science and Technology, Iran
Steel Fiber with Low Strength, Shear Behavior, Self Compacting Concrete Beams with Normal and
In order to investigate the effect of steel fiber (with low strength) on the shear behavior of self compacting concrete beams, 12 specimens had been designed and tested, which 6 of them had the compressive strength of 30 MPa and 6 of them had the compressive strength of 60 MPa. In each group 3 beams with distances of 80mm and 3 beams with distances of 100mm used stirrups and also in each group the volume of fiber to the concrete with percentages of zero, 0.5 and 1 percent had been changed. All the beams with simple support were loaded by two concentrated load to the stage of failure. The amount of applied load, the deflection of mid span and all strains in different positions in different stages of loading have been measured and recorded. In this research corrugated fiber with low strength (220 MPa) had been used.
The results of investigation shows that not only we can replace fibers with parts of stirrups by saving their strength but also we can reach to more shear ductility. Also in order to increase cracking shear strength, the prevention of sudden cracking and increase of absorption of energy, it is more effective to increase steel fiber rather than to increase stirrups.