Problem

A $3-$storey concrete special,moment resisting structure has the following properties:

Weight $of$ each storey:

Deck roof $=800kN$

$3^{rt}$ foor $=1600kN$

$2^{dx}$ floor $=2400kN$

$1frr=0$

$(1)$ Compute the period of vibration of the structure in seconds if it has a numerical coefficient of $C_1=0\mathrm{.}0731.$

a$)0\mathrm{.}529sec.$

c$)0\mathrm{.}604sec.$

b$)0\mathrm{.}313sec.$

d$)0\mathrm{.}477sec.$

$(2)$ Compute the shear at the base of the structure if the total lateral load on the deck roof is equal to $215\mathrm{.}38kN.$

a$)800kN$ :

c$)750kN$

b$)600kN$

d$)650kN$

$(3)$ Compute the strear farce on the $2$ mid fioor.

a$)567\mathrm{.}73kN$

c$)693\mathrm{.}85kN$

b$)660\mathrm{.}12kN$

d$)523\mathrm{.}07kN$