The use of compression reinforcement permits the use of more tension reinforcement to increase the strength of a given beam section while keeping the section tension-controlled.

Determine the transverse reinforcement index, Ktr, for a rectangular beam with b = 17 in. and d = 24 in., three uncoated No. 8 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 3 Grade 40 stirrups located every 6 in. along the span. Assume 4,000-psi normal-weight concrete and a clear cover of 1.75 in.

A continuous beam’s flexural reinforcement must extend at least _____ from the point where it is no longer needed to resist tension. Assume f’c = 4,000 psi, fyt = 40,000 psi, d = 23 in., w = 13.5 in., and t = 6 in. There are five No. 7 longitudinal tension bars and No. 5 stirrups at 6 in. o.c.

When a reinforcing bar is loaded in _______, the diameter of the bar decreases slightly, due to Poisson’s ratio.

If φVc = 34 kip and Vu = 68 kip, are stirrups required?

The shear failure of a slender beam without stirrups is sudden and dramatic.

A concrete floor system with a ratio of the longer to the shorter span length that is less than 2 is usually considered a two-way system.

Assuming Vs exceeds 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b1 = 37 in., b2 = 12 in., d1 = 6 in., and d2 = 33 in. There are three No. 8 longitudinal tension bars and No. 4 stirrups at 10 in. o.c.

Bond stress values do not vary from point to point between cracks.

In designing for shear, one must ensure that the shear strength equals or exceeds the flexural strength at all points in the beam.