Full file at ... · Problem 2.56 t Repeat Prob. 2.27 using the spreadsheet for Chapter 2 Open the...
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Centroid of tension steel bars is located
at a distance from the bottom of the
beam of
[(4)(1.00 in2)(3 in)+ (2)(1.00 in2)(6 in)]/6 =
4 in., or one inch above the bottom layer.
Therefore d = 20 in.
The value of fs here is at the centroid of the tension steel bars. At the bottom layer of bars,
the distance from the neutral axis is one inch larger, so the stress in the bottom layer is
calculated using y = 12.33 in. instead of 11.23 in. The resulting value of fs = 14,037 psi.
Full file at https://testbanku.eu/Solution-Manual-for-Design-of-Reinforced-Concrete-9th-Edition-by-McCormac
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The value of fs here is at the centroid of the tension steel bars. At the bottom layer of bars,
the distance from the neutral axis is two inches larger, so the stress in the bottom layer is
calculated using y = 19.70 in. instead of 17.70 in. The resulting value of fs = 36,255 psi.
Full file at https://testbanku.eu/Solution-Manual-for-Design-of-Reinforced-Concrete-9th-Edition-by-McCormac
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4#8
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Problem 2.56 – Repeat Prob. 2.27 using the spreadsheet for Chapter 2
Open the Chap. 2 spreadsheet, and select the Rectangular Beam Moment Strength
Worksheet. Input the values for cells colored yellow.
Nominal Moment Strength Singly Reinforced Rectangular Beam
Units
f'c = 4000 psi
b = 16 in.
d = 26.25 in.
As = 6 in 2
fy = 60 ksi
a = 6.62 in.
Mn = 8258.8 in.-k
688.2 kip-ft
Mn = 619.4 kip-ft
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Problem 2.57 – Repeat Prob. 2.28 using the spreadsheet for Chapter 2
Open the Chap. 2 spreadsheet, and select the Rectangular Beam Moment Strength
Worksheet. Input the values for cells colored yellow.
Nominal Moment Strength Singly Reinforced Rectangular Beam
Units
f'c = 4000 psi
b = 16 in.
d = 25 in.
As = 5.06 in 2
fy = 60 ksi
a = 5.58 in.
Mn = 6742.8 in.-k
561.9 kip-ft
Mn = 505.7 kip-ft
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