Problem $1.$

Consider the four$-$story office building with story height of $12\text{'}$ and plan shown below, located on soil type C in Santa Monica, California. The floor and roof loads are $100$ psf and $80$ psf $,$ respectively.

Consider the different options listed below and compare the seismic design base shear for each building frame used as a lateral load$-$resisting system in the longitudinal direction:

a$)$ Special reinforced concrete shear walls

b$)$ Steel eccentrically braced frames

c$)$ Intermediate reinforced masonry shear walls

Estimate the lateral seismic force induced at the top floor of this four$-$story building when concrete shear walls are used $($option a$).$ How would this force change for a thirty$-$story building?

Make assumptions, as needed.

$1$