For the following description find:

The Base Shear Vb for the building

The building's fundamental period of oscillation

The force distribution up the building

Please follow the example problem in this module for the format of the solution information.

Building and Site description:

$8$ story Hospital $-$ floor to floor height $18\text{'}$ each story, floor weight $350$ k$,$ roof weight $250$ k$.$

Tillamook, Oregon

Site class D

Building Frame system with Special reinforced concrete shear walls$3$:$51bo.M$

INTRODUCTION: UNDERSTANDING LOADS

$35$

Table $1\mathrm{.}14$c Design Coefficients and Factors for Basic Seismic$-$Force$-$Resisting Systems

$\backslash$table$[[$Seismic$-$Force$-$Resisting System,R$,$System Height Limits $($ft$)],[3.$ Moment$-$resisting frame systems,,$\frac{A}{B},C,D,E,F,,,,],[$A$.$ Special steel moment frames,$8\mathrm{.}0,NL,NL,NL,NL,NL,,,,],[$B$.$ Special steel truss moment frames,$7\mathrm{.}0,NL,NL,160,100,NP,,,,],[$C$.$ Intermediate steel moment frames,$4\mathrm{.}5,NL,NL,{35}^b,N{P}^{b,c},N{P}^{b,c},,,,],[$D$.$ Ordinary steel moment frames,$3\mathrm{.}5,NL,NL,N{P}^{b,c},N{P}^{b,c},N{P}^{b,c},,,,],[$E$.$ Special reinforced concrete moment frames,$8\mathrm{.}0,NL,NL,NL,NL,NL,,,,],[$F$.$ Intermediate reinforced concrete moment frames,$5\mathrm{.}0,NL,NL,NP,NP,NP,,,,],[$G$.$ Ordinary reinforced concrete moment frames,$3\mathrm{.}0,NL,NP,NP,NP,NP,,,,],[$H$.$ Special composite moment frames,$8\mathrm{.}0,NL,NL,NL,NL,NL,,,,],[$I$.$ Intermediate composite moment frames,$5\mathrm{.}0,NL,NL,NP,NP,NP,,,,],[$J$.$ Composite partially restrained moment,$6\mathrm{.}0,160,160,100,NP,NP,,,,],[$K$.$ Ordinary composite moment frames,$3\mathrm{.}0,NL,NP,NP,NP,NP,,,,],[$L$.$ Masonry wall frames,$5\mathrm{.}5,NL,NL,160,160,100,,,,]]$

For SI: $1ft=304\mathrm{.}8mm,1l\frac{b}{f}{t}^2=0\mathrm{.}0479k\frac{N}{m^2}.$

Table $1\mathrm{.}14$d Design Coefficients and Factors for Basic Seismic$-$Force$-$Resisting Systems

$\backslash$table$[[$Seismic$-$Force$-$Resisting System,R$,$System Height Limits $($ft$)],[4.$ Dual systems with special moment frames,,$\frac{A}{B},C,D,E,F,],[\backslash$table$[[$A$.$ Steel eccentrically braced frames,$],[$moment$-$resisting connections, at$],[$columns away from links$]],8\mathrm{.}0,NL,NL,NL,NL,NL,],[\backslash$table$[[$B$.$ Steel eccentrically braced frames,$],[$non$-$moment$-$resisting, connections at$],[$columns away from links$]],7\mathrm{.}0,NL,NL,NL,NL,NL,],[$C$.$ Special steel concentrically braced frames,$8\mathrm{.}0,NL,NL,NL,NL,NL,],[$D$.$ Special reinforced concrete shear walls,$8\mathrm{.}0,NL,NL,NL,NL,NL,],[$E$.$ Ordinary reinforced concrete shear walls,$7\mathrm{.}0,NL,NL,NP,NP,N$