If the depth of actual neutral axis of a doubly reinforced beam
A)Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier
B)Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
C)Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously
D)All the above

Question

Quizplus · Accepted Answer

The statements accurately describe the behavior of a doubly reinforced beam under different conditions regarding the actual neutral axis and the critical neutral axis. When the actual neutral axis is deeper than the critical, concrete reaches its maximum stress first. If it's shallower, the tensile steel reaches its maximum stress first. When both are equal, both materials reach their maximum stresses simultaneously.

If the Depth of Actual Neutral Axis of a Doubly