Question
Download Solution PDFAssuming the stress block diagram of the rectangular concrete beam section as per IS 456 - 2000, the depth of the centre of compressive force measured from the neutral axis is given by: (Assuming Xu as the depth of neutral axis from top compression fiber)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Stress and Strain Diagram of a Singly Reinforced Beam in Limit State Method:
Where Xu = Actual depth of neutral axis
fck = Characteristic compressive strength of concrete
fy = Yield stress of steel
Design compressive strength of concrete = 0.45 fck
Maximum compressive force resisted by concrete, C = 0.36 fck.b.xu
The centroid of the compressive force is at a distance of 0.42Xu from the extreme compression fiber.
So the distance of CG from the neutral axis = xu – 0.42xu = 0.58 xu
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