SIIUATION $2(10\%$ each$)$

The reinforced concrete beam is loaded as shown. Assyme the section is uncracked. $n=10,P^{\text{'}}c=21$MPa

b

The moment of inertia of the uncracked section is

a$.3\mathrm{.}385{10}^9$

b$.3\mathrm{.}3417{10}^9$

c$.1\mathrm{.}8244{10}^9$

$m{m}^4.$

d$.4\mathrm{.}189{10}^9$

e$.3\mathrm{.}7092{10}^9$

The cracking moment in $KN.m$ is

$5$

c$.39\mathrm{.}557$

d$.42\mathrm{.}286$

e$.38\mathrm{.}472$

a$.36\mathrm{.}514$

b$.56\mathrm{.}051$

is $5\mathrm{.}50$

The bending stress in compression is

c$.5\mathrm{.}308$ MPa

d$.5\mathrm{.}558$ MPa

e$.3\mathrm{.}034$ MPa