Structural Concrete - Hassoun

Problems 857
20.5 Design the transverse reinforcement for the beam of a special moment-resisting frame. The beam
is reinforced with five no. 8 bars and is 24 × 30 in. The load acting on the beam is W D = 3.0 kip/ft,
W L = 1.5 kip/ft, and clear span is 24 ft.
20.6 Design the reinforcement for a column on the first floor of a four-story building following the provisions
for special moment-resisting frame reinforcement. The column is 30 × 30 in. and 12 ft high. Nominal
flexural strength of the beam framing into the column M n = 650 Kip ⋅ ft.Theaxialloadactingonthe
second-floor column is P u = 1,920 Kip, axial load acting on the first floor is P u = 2000 Kip, and minimum
axial load in load combination is 1010 K. The shear force is V u = 120 Kip. Draw the detail of
reinforcement.
20.7 Design the reinforcement for a wall having a total height of 28 ft and span of 35 ft. The total gravity load
acting on the wall is 5,200 Kip, factored moment M u is 50,000 kip ⋅ ft, and base shear is V is 1,000 Kip.
Wall thickness is 20 in. and boundary elements are 25 × 25 in.