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problem description
title="dynamic frame analysis" nodes=8 elements=9 analysis=spectral
analysis parameters
beta=0.25 gamma=0.5 alpha=0.0
start=0.0 stop=40.0 step=0.2
nodes=[3,8] dofs=[Tx] mass-mode=lumped
nodes
1 x=0 y=0 constraint=fixed
2 x=360 y=0
3 x=0 y=180 constraint=free
4 x=360
5 x=0 y=300 force=f1
6 x=360
7 x=0 y=420 force=f1
8 x=360
beam elements
1 nodes=[1,3] material=wall_bottom
2 nodes=[3,5] material=wall_top
3 nodes=[5,7]
4 nodes=[7,8] material=floor_top load=top_wt
5 nodes=[5,6] material=floor_bottom load=bottom_wt
6 nodes=[3,4] load=bottom_wt
7 nodes=[8,6] material=wall_top
8 nodes=[6,4]
9 nodes=[4,2] material=wall_bottom
material properties
wall_bottom A=13.2 Ix=249 E=30e6 rho=0.0049
wall_top A=6.2 Ix=107 E=30e6 rho=0.0104
floor_top A=12.3 Ix=133 E=30e6 rho=0.01315
floor_bottom A=24.7 Ix=237 E=30e6 rho=0.0136
distributed loads
top_wt direction=perpendicular values=(1,-62.5) (2,-62.5)
bottom_wt direction=perpendicular values=(1,-130) (2,-130)
forces
f1 Sfx=1.25/4*pow(6.0,4.0)/pow(w,5.0)*9*exp(-1.25*pow(6.0/w, 4.0))
constraints
fixed Tx=c Ty=c Rz=c
free Tx=u Ty=u Rz=u
end
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