May 15, 2013
|
RISA-3D,
Plates,
New,
Deflection
Below
is
a
model
of
a
flat
concrete
slab
made
of
plates.
In
order
to
ensure
adequate
serviceability
of
the
slab,
you
may
need
to
check
the
deflection
of
the
slab
between
columns.
However,
RISA-3D
only
reports
Member
and
Joint
Deflections.
There
is
no
such
thing
as
a
“Plate
Deflection”.
If
you
would
like
to
plot
the
deflection
between
columns
you
can
use
a
dummy
member.
Open
the
Section
Sets
spreadsheet
and
go
to
the
General
tab.
There
you
can
create
a
dummy
member
defined
as
a
rectangular
1”
x
1”
beam.
Next,
draw
the
dummy
member
in
your
model
along
the
line
which
you
would
like
the
deflection
plotted.
Because
this
member
has
such
a
small
area
and
moment
of
inertia
its
stiffness
will
have
a
negligible
impact
on
the
model’s
results.
Because
it
is
a
Physical
Member
it
will
automatically
connect
to
all
of
the
plate
corners
which
it
passes
(see
Plate-Member
Interaction)
Link:
Plate-Member
Interaction
After
solving
you
can
look
at
a
detail
report
for
the
member
to
see
a
detailed
deflection
diagram…
