Question

In limit state design of concrete for flexure, the area of stress block is taken as

• A. $0.530f_{ck}.X_u$
• B. $0.446f_{ck}.X_u$
• C. $0.420f_{ck}.X_u$
• D. $0.360f_{ck}.X_u$

Answer 1

The correct option is D $0.360f_{ck}.X_u$

d)
In limit state design of concrete the design strength of concrete is 0.446 $f_{ck}$ while the area of stress block is 0.36 $f_{ck}{X}_u$ Where $X_u$ is depth of neutral axis.