A doubly reinforced concrete beam has effective cover d' to the centre of compression reinforcement. xu is the depth of neutral axis, and d is the effective depth to the centre of tension reinforcement. What is the maximum strain in concrete at the level of compression reinforcement?

A doubly reinforced concrete beam has effective cover d' to the centre

1.	A doubly reinforced concrete beam has effective cover d' to the centre of compression reinforcement. xu is the depth of neutral axis, and d is the effective depth to the centre of tension reinforcement. What is the maximum strain in concrete at the level of compression reinforcement?
A.	0.0035 (1 - d'/d)
B.	0.0035(1 - d'/xu)
C.	0.002(1 - d'/xu)
D.	0.002(1 - d'/d)
Answer» C. 0.002(1 - d'/xu)

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A doubly reinforced concrete beam has effective cover d' to the centre of compression reinforcement. xu is the depth of neutral axis, and d is the effective depth to the centre of tension reinforcement. What is the maximum strain in concrete at the level of compression reinforcement?

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