simply supported beam is reinforced with 5-25mm at the bottom And 2-20mm at the top if the beam. Concrete covering to centroid of reinforcement is 70mm at the top and 64 mm at the bottom. The beam has a gross depth of

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A simply supported beam is reinforced with 5-25mm at the bottom And 2-20mm at the top if the beam. Concrete covering to centroid of reinforcement is 70mm at the top and 64 mm at the bottom. The beam has a gross depth of 450 mm and gross width of 300 mm. Fc’=28 mpa fy= 415 mpa. Assume bars are laid out in a single layer. 

calculate the following if the limiting tensile steel strain is 0.004 for ductile  failure:

a) depth if neutral axis from the extreme concrete compression fiber ( in mm, in whole number)

b) design strength of the beam section ( in kn•m , in whole number)

c) maximum service uniform live load over the entire span in Addition to a DL = 20 kn/m  ( including weight of the beam) if it has a span of 6 m ( in kn, in whole number) 

 

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