009 Longitudinal Reinforcement Design Beams Part3

For a given rectangular concrete beam, according to Eurocode 1992-1-1:

1. Derive the procedure of determining the required reinforcement. A concrete rectangular cross-section, 300×500, is made of C30/37 and reinforced by B500 steel. Assume the stirrup is T10 and the required nominal cover is 35mm:
2. If the available reinforcement is T20, how many reinforcements are required to withstand 250𝑘𝑁.𝑚 bending moment?
3. Determine the stress in reinforcements based on your design.

PS. Neglect the effect of compressive steel.

Dimensions are in mm. The cross-section is under a positive bending moment. The sketch is schematic and does not necessarily means that 4T20 is sufficient.

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