Document Type : Research Paper
Author
Civil Eng. Dept., Collage of Eng., University of Salahaddin-Arbil, Iraq.
Abstract
Abstract Twelve high strength fibrous reinforced concrete deep beams ( HSFRCDB ) were tested under two point loading . All the beams were reinforced with main steel reinforcement ratio ( p ) of about 2.4 percent to avoid flexural failure . The shear span - to - depth ratio ( a / d ) of the beams was about 2 and the volume fraction of the steel fibre was 0.5 percent . The beams were tested for different vertical stirrup nominal strength ( pfy ) , ranging from 0.15 to 4.44MPa , horizontal stirrup nominal strength ( Pfy ) , ranging from 0.4 to 3.63MPa and vertical and horizontal ( combination ) stirrup nominal strength ( pfy ) , ranging from 2.57 to 8.07MPa in addition to one beam without stirrups . Test results indicate that horizontal stirrups has little influence on the magnitude of the failure load . The test results of this investigation as well as those available in the literature ( 244 high and normal strength concrete deep beams with stirrups ) were compared with predictions based on the ( ACI , BS , Canadian and New Zealand Codes ) and works of other investigators ( Zustty , Siao and Sarsam ) and a Proposed Equation . The ACI , BS and Saio Equations are simultaneously conservative with relatively low COV values . The Proposed Equation has the lowest standard deviation , COV and conservative predictions .
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