A reinforced concrete beam is subjected to a factored moment M_u. If the beam is designed as 'tension-controlled' according to ACI 318, what is the minimum net tensile strain epsilon_t in the extreme tension steel at the nominal strength?

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Civil Engineering QUESTION #6624

Question 1

A reinforced concrete beam is subjected to a factored moment $M_u$. If the beam is designed as 'tension-controlled' according to ACI 318, what is the minimum net tensile strain $\epsilon_t$ in the extreme tension steel at the nominal strength?

0.002
0.003
0.004
0.005✔️

Correct Answer Explanation

According to ACI 318, a section is tension-controlled if the net tensile strain in the extreme tension steel is equal to or greater than 0.005 when the concrete in compression reaches its assumed strain limit of 0.003.

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