Geology Reference
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Figure 4. a) Photograph of the experimental set-up; b) Photograph of the experimental set-up showing
the base connections
Figure 5. Matlab Simulink diagram for the FLC implementation in the experiments
building. The equation of motion for the elastic
superstructure is expressed in the following form
where
M
a
is the superstructure mass matrix,
C
a
and
K
a
are the superstructure damping and stiff-
ness matrices, respectively, in the fixed-base case,
and
R
is the matrix of earthquake influence coef-
ficients. Furthermore,
U
,
U
, and
U
represent
the floor acceleration, velocity, and displacement
vectors relative to the base, respectively.
U
b
is
(
)
M U C U K U
+
+
= −
M R U
+
U
a
a
a
a
g
b
(6)
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