...
The
...
majority
...
of
...
...
for
...
a
...
massive
...
foundation
...
block
...
would
...
be
...
from
...
radial
...
or
...
geometric
...
damping
...
provided
...
by
...
the
...
surrounding
...
soil.
...
The
...
effect
...
of
...
material
...
damping
...
within
...
the
...
foundation
...
block
...
itself
...
would
...
likely
...
be
...
much
...
smaller
...
than
...
that
...
of
...
geometric
...
damping.
...
When
...
modeling
...
soil-structure
...
interaction
...
with
...
a
...
single
...
...
object,
...
the
...
damping
...
assigned
...
on
...
the
...
Linear
...
Link/Support
...
Directional
...
Properties
...
menu
...
should
...
represent
...
radial
...
damping,
...
as
...
described
...
in
...
Wilson
...
2004,
...
and
...
given
...
in
...
units
...
of
...
Force-Sec/Length
...
(Force/Velocity).
...
The
...
...
damping
...
value
...
specified
...
through
...
Analysis
...
Case
...
Data
...
>
...
Linear
...
Modal
...
History
...
should
...
represent
...
the
...
material
...
or
...
structural
...
damping
...
inherent
...
to
...
the
...
foundation
...
system
...
itself.
...
References
- Wilson,
...
- E.
...
- L.
...
- (2004).
...
- Static
...
- and
...
- Dynamic
...
- Analysis
...
- of
...
- Structures
...
- (4th
...
- ed.,
...
- pp.
...
- 197).
...
- Berkeley,
...
- CA:
...
- Computers
...
- and
...
- Structures,
...
- Inc.
...
Available
...
- for
...
- purchase
...
- on
...
- the Products >
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...
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