a rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. use concrete strength f's=21MPa and steel yield strength fy=415MPa for 20mm bars and fy=275MPa for 16mm bars. determine the depth of the uniform rectangular stress block on the beam section at ultimate stage when subject to positive bending.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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a rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. use concrete strength f's=21MPa and steel yield strength fy=415MPa for 20mm bars and fy=275MPa for 16mm bars. determine the depth of the uniform rectangular stress block on the beam section at ultimate stage when subject to positive bending.

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