Problem 1.01 A simply supported beam sustains a total dead load of 24 kN/m and live load of 35 kN/m over a clear span of 6 m. The beam is 350 mm wide, 620 mm deep reinforced with 4- dia 25 mm bars at an effective depth of 550 mm. (a) Calculate the required spacing of 12 mm stirrups at the critical section for shear using fc - 21 MPa and fy= 275 MPa. (b) Locate the section from the left support where stirrups are no longer required.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Problem 1 (1.
A simply supported beam sustains a total dead load of 24 kN/m and live load of 35 kN/m over a clear span of 6 m. The beam is 350 mm wide, 620 mm deep reinforced with 4- dia 25 mm bars at an effective depth of 550 mm.
(a) Calculate the required spacing of 12 mm stirrups at the critical section for shear using f'c = 21 MPa and fy= 275 MPa.
(b) Locate the section from the left support where stirrups are no longer required.
Problem 21
A reinforced concrete beam has a width of 300mm and an effective depth of 600mm. Compressive reinforcement (if required will be placed at d'=60mm. f'c=27.5 MPa and fy=415 MPa. Use NSCP 2015. The beam is to support a factored
bending moment of 670 kN-m,
a) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is permitted to be 0.004
b) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is limited to 0.005
c) Determine the number of 28mm bars required as tension reinforcement if the reduction factor, -0.90
Transcribed Image Text:Problem 1 (1. A simply supported beam sustains a total dead load of 24 kN/m and live load of 35 kN/m over a clear span of 6 m. The beam is 350 mm wide, 620 mm deep reinforced with 4- dia 25 mm bars at an effective depth of 550 mm. (a) Calculate the required spacing of 12 mm stirrups at the critical section for shear using f'c = 21 MPa and fy= 275 MPa. (b) Locate the section from the left support where stirrups are no longer required. Problem 21 A reinforced concrete beam has a width of 300mm and an effective depth of 600mm. Compressive reinforcement (if required will be placed at d'=60mm. f'c=27.5 MPa and fy=415 MPa. Use NSCP 2015. The beam is to support a factored bending moment of 670 kN-m, a) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is permitted to be 0.004 b) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is limited to 0.005 c) Determine the number of 28mm bars required as tension reinforcement if the reduction factor, -0.90
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