ARCE $315$ HW #$4$

A three$-$story university building is shown in the diagram below. The building is located the urban center of Berkeley, CA$.$

The unit dead load at the building roof is $45$ psf; the unit dead load at each floor is $85$ psf$.$ The building lateral force resisting system is ordinary concentrically braced steel frame.

Problem $1$: Seismic Force Computation:

Calculate the seismic base shear coefficient, $C_s.$

Determine the story weight at each level and the sum of the story weights.

Calculate the base shear, $V.$

Determine the height of each story from the ground and compute the product of the height $x$ the story weight. Compute the sum of all weight $x$ height products. Determine the percentage of weight $x$ height relative to the total.

Determine the story force at each level, $F_x=(\%w\frac{h}{}wh)xV.$

$\backslash$table$[[$Story$,$Weight, $W_x(k),$Height, $H_x(ft),W_x^{**}{H}_x(k-ft),\%W_x^{**}{H}_x{W}_x^{**}{H}_x,F_x$