Prob. 3.5-5. A 15-in.-diameter, reinforced-concrete column has six 9/8-in.-diameter steel reinforcing rods uniformly spaced around a circle. E, = 3 x 10³ ksi and E, = 30 x 10³ ksi. (a) Determine the axial stress in the concrete and the axial stress in the steel under an axial load P = 150 kips. (Note: Treat the six reinforcing bars as a single element, and treat the concrete as a second element. Use the net area of concrete.) (b) How much does the column shorten under the 150-kip load? d = 15 in. P = 150 kips P3.5-5 L = 8 ft
Prob. 3.5-5. A 15-in.-diameter, reinforced-concrete column has six 9/8-in.-diameter steel reinforcing rods uniformly spaced around a circle. E, = 3 x 10³ ksi and E, = 30 x 10³ ksi. (a) Determine the axial stress in the concrete and the axial stress in the steel under an axial load P = 150 kips. (Note: Treat the six reinforcing bars as a single element, and treat the concrete as a second element. Use the net area of concrete.) (b) How much does the column shorten under the 150-kip load? d = 15 in. P = 150 kips P3.5-5 L = 8 ft
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Prob. 3.5-5. A 15-in.-diameter, reinforced-concrete column
has six 9/8-in.-diameter steel reinforcing rods uniformly
spaced around a circle. E, = 3 x 10³ ksi and E, = 30 × 10³
ksi. (a) Determine the axial stress in the concrete and the
axial stress in the steel under an axial load P = 150 kips.
(Note: Treat the six reinforcing bars as a single element, and
treat the concrete as a second element. Use the net area of
concrete.) (b) How much does the column shorten under
the 150-kip load?
d = 15 in.
P = 150 kips
P3.5-5
L = 8 ft
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