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Section 5
5-353
General format:
⎧X ⎫ ⎧ ⎫
GRO
UND MOTION ⎨Y ⎬ ⎨ACCEL ⎬ f
3
PHASE f
4
⎩
Z
⎭ ⎩DISP
⎭
Enter the direction of the ground motion, the acceleration
magnitude, and the phase angle by which the motion in this
direction lags (in degrees). One Ground Motion command can be
entered for each global direction.
f
3
Ground acceleration in g’s or displacement in length units.
f
4
Phase angle in degrees