$1.$ Task

Investigate the load process of a rectangular reinforced concrete cross$-$section having height h $=.....\mathrm{.}720......$ mm$,$ width b $=..\mathrm{.}450.........$ mm$,$ main longitudinal reinforcements A$)622............,$ B$)1222............,$ and C$)212..........$ ribbed, $......$ B$500$B $.........$ steel grade, applied diameter of stirrups $...10.........$ mm based on the ideal cross$-$sectional properties of the cross$-$section. The concrete strength class of the structure can be determined on the basis of the lowest strength grade recommended for the $......$ XC$2.................$ exposure $($environmental$)$ class, in which concrete the maximum grain size of the aggregate is dmax $=.....\mathrm{.}24.......$ mm$,$ the applied type of cement is $......$CEM $32,5$ R$...................,$ and the designed consistency is $...$ F$3...........,$ while design life time is $50$ years! The results obtained in each case must be determined by $6$ related pairs of values of the Moment$-$Curvature diagram of the cross section. The intermediate state must be represented at least $1$ point located at any point of the diagram between the II$.$ and III. state of stresses! Plots the $3$ different M$-$ curves determined by $6$ pairs of values for each of the three cases on an EXCEL X$-$Y diagram! $($ CASE A$,$B$,$C i need working for both cracked and uncracked for each case. Use eurocode in the design$)$