SITUATION $2(12\%$ each$)$

The width and overall depth of a reinforced concrete beam is $400$ mm and $700$ mm $,$

respectively. The effective depth is $630mm,f^{\text{'}}c=27\mathrm{.}6$MPa and fy $=414$MPa. If the beam is a

bajanced section

$6.$calculate the area of steel in the section in $m{m}^2.$ Ans.

$7.$Calculate the depth of compression block in the section at failure in mm $.$ Ans:

$8.$calculate the depth of the neutral axis in the section at failure in mm $.$ Ans.

$9.$calculate the ulimate moment capacity of the section in $kN.m.$ Ans.

$10.$if the given section is to support the maximum positive moment in a $5-m$ simply

supported beam loaded with uniformly distributed load $w_u$ over the entire length and a

concentrated load $P_u=10KN$ at midspan, calculate the maximum value of wu without

exceeding the capacity of the given section in $K\frac{N}{m}.$ Ans