Determine the transverse reinforcement index, Ktr, for a rectangular beam with b = 16 in. and d = 24 in., four epoxy-coated No. 9 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 12 in. along the span. Assume 4,000-psi normal-weight concrete and a clear cover of 2 in.

In a pull-out test, a concrete cylinder containing the bar is placed on a stiff plate and a jack is used to pull the bar out of the cylinder.

Which type of reinforcement is frequently used in bridge decks?

A rectangular beam with cross section b = 16 in., h = 26 in., and d = 23.5 in. supports a total factored uniform load of 1.10 kips/ft, including its own dead load. The beam is simply supported with a 24-ft span. It is reinforced with five No. 5 Grade 60 bars, three of which are cutoff between midspan and the support and two of which extend 10 in. past the centers of the supports. The concrete strength is 3,000 psi (normal weight). The beam has Grade 60 No. 3 stirrups satisfying ACI 318-14 Sections 9.7.6.2.2 and 9.6.3.3. The strength of the five bars is φMn = 156 kip-ft, and the strength of the remaining two bars is φMn = 64.29 kip-ft. If the distance from the support to the theoretical cutoff point is 6.793 ft, determine the distance from the support to the actual cutoff point (i.e. use ACI 318-14 Section 9.7.3.3).

Determine the epoxy modification factor, ψe, for a rectangular beam with b = 17 in. and d = 20 in., five galvanized No. 9 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 8 in. along the span. Assume 6,000-psi normal-weight concrete and a clear cover of 2 in.

A simply-supported beam has a 4 kip/ft uniformly-distributed load over the entire 8-ft span. What is the magnitude of the shear force at midspan?

The ACI Code uses the concept of development length instead of _______, because the actual bond stress varies along the length of a reinforcing bar.

Determine the epoxy modification factor, ψe, for a rectangular beam with b = 16 in. and d = 22 in., five epoxy-coated No. 9 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 6 in. along the span. Assume 7,000-psi normal-weight concrete and a clear cover of 2 in.

Determine the lightweight modification factor, λ, for a rectangular beam with b = 17 in. and d = 24 in., three galvanized No. 9 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 8 in. along the span. Assume 7,000-psi lightweight concrete and a clear cover of 2 in.

Determine the casting-position modification factor, ψt, for a rectangular beam with b = 17 in. and d = 23 in., four galvanized No. 7 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 8 in. along the span. Assume 8,000-psi normal-weight concrete and a clear cover of 1.75 in.