Question No$.4$:

A secondary school is located in an open area in Dubai. The building is made of reinforced

concrete. The lateral$-$load$-$resisting system in the N$-$S direction comprises of a number of special

RC moment resisting frames and shear walls $($dual syatem$),$ while the lateral loads are resisted in

the E$-$W direction by special RC moment resisting frames, as shown in Figure $4.$ The following

information about the building is available:

$-$ The building consists of a ground story and five typical stories

$-$ The story height is $4\mathrm{.}2$ m except for the ground story, which is $5\mathrm{.}8$ m high.

$-$ Total permanent load $($self weight and superimposed load$)$ can be assumed equal to $9\mathrm{.}5$ kN$/$m$2$

Live load is $3\mathrm{.}0$ kN$/$m$2$ for all stories except for the roof which has a live load of $1\mathrm{.}5$ kN$/$m$2.$

$-$ A water tank, which has a total weight of $1900$ kN$,$ is installed on the roof

$-$ Soil type: Stiff soil

$-$ Material Properties: Concrete: f $=40$ MPa, Reinforcement: fy $=420$ MPa

The following are required for questions $1$ to $10$:

i$.$ Use the ASCE $7$ Equivalent Lateral Force Procedure to determine the following:

a$.$ Total seismic base shear, V$,$ of the building.

b$.$ The distribution of seismic forces along the height of the building.

c$.$ The distribution of story shear along the height of the building.

d$.$ Maximum overturning moment at foundation.

iii. Use the ASCE $7$ Analytical Procedure to determine the following:

a$.$ Maximum wind forces and their distribution on the building.

b$.$ Total base shear, V$,$ due to wind.

c$.$ Maximum overturning moment due to wind at foundation.

$($Calculate the wind forces from external pressure only, and assume that the building is enclosed$)$

iv$.$ Select the maximum base shear and overturning moment that govern the design from

earthquake and wind loads. Figure $4$