Shear strength of Round Section
Shear strength of Round Section
(OP)
How would everyone calculate the effective shear area of a concrete beam with a circular cross section?
Normally, with a rectangular section the shear resistance is a function of bw*d.
However, with a round section bw is harder to figure out. For now I am assuming an equivalent square section, with an effective bw=0.8*Diameter , and with the top of the equivalent rectangular section at the top of the circular section. Then I am assuming that d = 0.8*Diameter as well.
Is this right?
Normally, with a rectangular section the shear resistance is a function of bw*d.
However, with a round section bw is harder to figure out. For now I am assuming an equivalent square section, with an effective bw=0.8*Diameter , and with the top of the equivalent rectangular section at the top of the circular section. Then I am assuming that d = 0.8*Diameter as well.
Is this right?






RE: Shear strength of Round Section
RE: Shear strength of Round Section
RE: Shear strength of Round Section
RE: Shear strength of Round Section
D need not be less than the distance from the extreme compression fiber to the centroid of the longitudinal tension reinforcement.
RE: Shear strength of Round Section
For shear of circular concrete members, ACI 11.3.3 says "the area used to compute Vc shall be taken as the product of the diameter and effective depth of the concrete section. It shall be permitted to take the effective depth as 0.8 times the diameter of the concrete section."
The commentary says "Shear tests of members with circular sections indicate that the effective area can be taken as the gross area of the section or as an equivalent rectangular area."