a. The beam of the cross section shown below has f'c = 3000 psi and f₁ = 60,000 psi. Neglect the tensile strain check and As,min check. Calculate Mr. b. Same cross section as part (a) but the steel is changed to four No. 10 bars. Calculate Mr. Calculate the percent increase in M, and As. c. Same cross section as part (a) but the depth d is increased to 28 in. Calculate Mr. Calculate the percent increase in M, and d. n d. Same cross section as part (a) but f'c is increased to 4000 psi. Calculate M. Calculate the percent increase in M, and f'c. n e. For the same cross section verify that the tension steel yields. S For 4#9, A = 4.00 in.² and for 4#10, A = 5.08 in.² S 16" 4-#9 24"
a. The beam of the cross section shown below has f'c = 3000 psi and f₁ = 60,000 psi. Neglect the tensile strain check and As,min check. Calculate Mr. b. Same cross section as part (a) but the steel is changed to four No. 10 bars. Calculate Mr. Calculate the percent increase in M, and As. c. Same cross section as part (a) but the depth d is increased to 28 in. Calculate Mr. Calculate the percent increase in M, and d. n d. Same cross section as part (a) but f'c is increased to 4000 psi. Calculate M. Calculate the percent increase in M, and f'c. n e. For the same cross section verify that the tension steel yields. S For 4#9, A = 4.00 in.² and for 4#10, A = 5.08 in.² S 16" 4-#9 24"
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:a. The beam of the cross section shown below has f'c = 3000 psi and f₁ = 60,000 psi.
Neglect the tensile strain check and As,min check. Calculate Mr.
b. Same cross section as part (a) but the steel is changed to four No. 10 bars.
Calculate Mr. Calculate the percent increase in M, and As.
c. Same cross section as part (a) but the depth d is increased to 28 in.
Calculate Mr. Calculate the percent increase in M, and d.
n
d. Same cross section as part (a) but f'c is increased to 4000 psi. Calculate M.
Calculate the percent increase in M, and f'c.
n
e. For the same cross section verify that the tension steel yields.
S
For 4#9, A = 4.00 in.² and for 4#10, A = 5.08 in.²
S
16"
4-#9
24"
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