Effect of Cement Matrix’s Type on the Shear Performance of Lightly Reinforced Squat Shear Walls Subjected to Cyclic Loading

2013 ◽  
Vol 658 ◽  
pp. 42-45 ◽  
Author(s):  
Su Won Kang ◽  
Hyun Do Yun
Keyword(s):  
Reinforced Concrete ◽  
Shear Walls ◽  
Cement Composite ◽  
Shear Behavior ◽  
Fiber Reinforced Concrete ◽  
Cement Matrix ◽  
Concrete Wall ◽  
Brittle Behavior ◽  
Reinforced Concrete Wall ◽  
Displacement Reversals

This study was conducted to experimentally investigate the shear behavior of non-ductile squat shear walls with different cement matrixes such as normal concrete, fiber-reinforced concrete(FRC), and strain-hardening cement composite(SHCC). The cement matrix type’s effect in the lightly reinforced squat shear wall was evaluated through the testing of three one-third scale walls with a height-to-length ratio (hw/lw) of 0.55 under top displacement reversals. Experimental results show that the cement matrix type in the non-seismically detailed squat shear walls has a significant effect on the shear behavior and failure mode. Compared to reinforced FRC and SHCC shear walls, reinforced concrete wall exhibited brittle behavior. Reinforcing fibers in the FRC and SHCC mitigated the crack damage of wall and increase the shear strength.

Tests of Mechanical Characteristics of Steel Fiber Reinforced Concrete Wall-Beams Simply Supported

2012 ◽  
Vol 446-449 ◽  
pp. 3355-3359
Author(s):  
Su Qi ◽  
Song Bai Jiang ◽  
Nian Liu ◽  
Wei Wu
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Failure Load ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Concrete Wall ◽  
Simply Supported ◽  
Increase Rate ◽  
Reinforced Concrete Wall

The characteristics of crack load, failure load, crack and deflection of steel fiber reinforced concrete wall-beams simply supported have been studied though the tests of 12 steel fiber reinforced concrete wall-beams simply supported specimens. The upper steel of joists changing from tensile reinforcement to compressive reinforcement, neutral axis moving from joists to walls and phenomenon of stress redistribution in wall-beams with the increase of external load have been found; the optimum mixing amount of steel fiber has been determine and the increase rate of crack load and failure load comparing steel fiber reinforced concrete wall-beams simply supported with ordinary ones has been raised. It is good for the practical constructions application that steel fiber increases the ductility of simply supported wall-beams.

Experimental Research of Bending Capacity of Normal Section of Steel Fiber Reinforced Concrete Wall-Beams Simply Supported

2012 ◽  
Vol 193-194 ◽  
pp. 1365-1370
Author(s):  
Su Qi ◽  
Ye Zhang ◽  
Shu Hao Liu ◽  
Xiong Song
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Concrete Wall ◽  
Fiber Volume ◽  
Normal Section ◽  
Simply Supported ◽  
Reinforced Concrete Wall

Because the joists in the wall-beams are in eccentric tension during work and the concrete tensile strength is low, the bending capacity of normal section of wall-beams is not too large. Steel fibers mixed into the concrete, playing enhancement and crack-resistance roles would lead to changes in the nature of concrete materials so that it is impossible to fully use the existing research results of ordinary concrete wall-beams simply supported when studying bending behavior of normal section of steel fiber reinforced concrete wall-beams simply supported. Therefore, it is necessary to do pilot studies on bending behavior of normal section of steel fiber reinforced concrete wall-beams simply supported. Based on the vertical static load test of 12 steel fiber reinforced concrete wall-beams simply supported specimens under different fiber volume ratio conditions, the strains of steel and concrete, cracking load, failure load and development situation in the cracks were tested while working characteristics of steel fiber reinforced concrete wall-beams simply supported were studied. This paper discussed the effect of fiber volume ratio on cracking moment and ultimate moment of steel fiber reinforced concrete wall-beams simply supported, which shows that the optimum mixing amount of steel fiber is 1.2%. The conclusion is of great significance in both theory and engineering practice, and it helps to guide the application of practical engineering.

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