Shear strength and behaviour of high strength fibrous reinforced concrete deep beams (HSFRCDB)‎ with shear reinforcement

Abstract EN

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 (pify), ranging from 0.

4 to 3.

63MPa and vertical and horizontal (combination) stirrup nominal strength (pvify), ranging from 2.

57 to 8.

07MPa in addition to one beam without stirrups.

Test results indicate that horizontal stirrups have 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, CO V and conservative predictions.