CEE 6521
HW #7 Torsion Homework
Due Friday, Nov. 1
Detail all shear/torsion reinforcement. Use # 4 closed two-leg stirrups for combined shear+torsion
reinforcement and use extra #4 bars for longitudinal torsion reinforcement.
fc = 4,000 psi
fy = 60,000 ps
CEE 6521, Shear HW #5 Strut & Tie
Due Friday, October 11
1. Using design the RC deep beam shown below. Use Grade 60 #7 bars as the main flexural
reinforcement and #3 bars as the skin reinforcement. = 0.75.
fc = 4,000 psi. fy= 60,000 psi b = 18 inch.
Pu= 4
CEE 6521, Homework #11, Shearwall & Coupling Beam
Due Dec. 6
1)
Design the first story of the 8-ft long shearwalls below using uniformly spaced vertical
and horizontal reinforcement. Use two layers, one on each side of each wall. ( suggest
#5 vertical and
CEE 6521, Homework, Slender column
Due Monday Nov. 25
Use moment magnifier technique to determine slender column effects. Is the column adequate?
fc = 4000 psi
fy = 60,000 psi
cover = 1 inch
#3 ties
beam b = 20
Beam reinforced with 4 #10 top and bottom. C
CEE 6521
Homework #8
Column Interaction
due Monday, Nov 11
Draw the column interaction diagrams for bending about the y axes for the following cases. Plot
Pn v. Mn and Plot Pu v. Mu. Use d of 2.5 inches for all cases. Bars are equally spaced. For
verifica
2
number of stirrups: nbars 8
v 0.75
fy 60ksi
Area of #5 rebar: As5 0.31in
Nu 50kip
2
Av nbars As5 2.48 in
Vn Av fy Nu 198.8 kip
Vu v Vn 149.1 kip
1 (rough joint)
ORIGIN 1
nbars 4
2
As4 0.2in
fy 60ksi
jd 20in
2
Av nbars As4 0.8 in
0.75
Pu1 216kip
Pn1
Pu1
288 kip
Pu2 108kip
Pn2
Pu2
144 kip
Fs Av fy 48 kip
force in each stirrup
Pn1
2
ns_req1
# of stirrups to resist Pn1
Reaction at support
Pn1
Rn
Moment at mids