Closed Book Exam.

Question No$.1$: $(50\%)$

Figure $1$ shows the structural layout of a building. All structural elements are cast$-$in$-$place. For the beam on Axis $($B$),$ it is required to:

a$-$ Design the critical section for shear at support $\text{'}i\text{'}$ using $$100-$shaped stirrups. Neglect the column width in your caleulation. $2br$

b$-$ Re$-$design the critical section for shear at support $\text{'}i\text{'}$ using #$8$ stimups with eight branches. Neglect the $)=120,LL=(10$ column width in your calculation. $8$

c$-$ Draw a clear cross section of the beam showing all

$\text{'}$m$)$

reinforcement details.

d$-$ Comment on the final design of the two design cases in $($a$)$ and $($b$)$; i$.$e$.$ which case produces smallest spacing.

Given Data:

Given loads are unfactored loads $(kN$&$k\frac{N}{m})$ and do not include the beam self weight.

Figure $1$

Slab thickness $(t_s)=80mm$

Beam depth $($d$)=500mm$ Beam height $(h)=560mm,$ Beam width $(b_w)=400mm$

$f_c=28$MPa,$f_y=420$MPa, Flexural reinforcement $8$#$25$