Question $2$

The T$-$section shown below is required to carry an ultimate moment of $175kNm.$ Calculate the area of steel required given $f_{ck}=30$MPa concrete and $f_{yk}=450$MPa reinforcement. Use the conservative and exact approaches if the neutral axis is located in the web.

Assume:

${}_{cc}=0\mathrm{.}67$ as the factor that allows for long$-$term effects and the difference between the bending strength and the cylinder crushing strength of the concrete;

${}_c=1\mathrm{.}5$ as the material factor of safety for concrete; and

${}_s=1\mathrm{.}15$ as the material factor of safety for steel. use Eurocode $2.$

CEE$5211$

rigure L: I$-$beam