A rectangular concrete beam is 12 in. wide and has an effective depth (d) of 18 in. Compression steel is located 2.5 in. from the compression face of the beam and is two No. 8 bars. Calculate the design moment capacity of the beam, for f'c = 4,000 psi and fy = 60,000 psi. Solve for the following tension reinforcement amounts: a Three No. 10 bars in one layer b Four No. 10 bars in two layers (Two No. 10 bars in each layer) c Six No. 9 bars in two layers (Three No. 9 bars in each layer)
A rectangular concrete beam is 12 in. wide and has an effective depth (d) of 18 in. Compression steel is located 2.5 in. from the compression face of the beam and is two No. 8 bars. Calculate the design moment capacity of the beam, for f'c = 4,000 psi and fy = 60,000 psi. Solve for the following tension reinforcement amounts: a Three No. 10 bars in one layer b Four No. 10 bars in two layers (Two No. 10 bars in each layer) c Six No. 9 bars in two layers (Three No. 9 bars in each layer)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A rectangular concrete beam is 12 in. wide and has an effective depth (d) of 18 in. Compression steel
is located 2.5 in. from the compression face of the beam and is two No. 8 bars. Calculate the design
moment capacity of the beam, for f'c = 4,000 psi and fy = 60,000 psi. Solve for the following tension
reinforcement amounts:
a
b
C
Three No. 10 bars in one layer
Four No. 10 bars in two layers (Two No. 10 bars in each layer)
Six No. 9 bars in two layers (Three No. 9 bars in each layer)
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Step 1: Introduce the given data
VIEWStep 2: Case-1 - Determine Neutral Axis
VIEWSolution
VIEWStep 3: Case-1- Check whether the steel yields or not
VIEWStep 4: Case-1 Re-compute the depth of Neutral Axis
VIEWStep 5: Case-1 - Compute design moment strength
VIEWStep 6: Case-2 - Determine Neutral Axis
VIEWStep 7: Case-2- Check whether the steel yields or not
VIEWStep 8: Case-2 Determine the Design moment strength
VIEWStep 9: Case-3 - Determine Neutral Axis
VIEWStep 10: Case-3 Determine the Design moment strength
VIEW
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