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Default modeling procedures locate object boundary conditions along the centroid of the cross section. When a simply supported |
Default modeling procedures locate object boundary conditions along the centroid of the cross section. When a simply supported (pin-pin)
...
...
object
...
is
...
modeled
...
with
...
a
...
top-center
...
or
...
bottom-center
...
insertion
...
point
...
,
...
internal
...
...
are
...
generated
...
which
...
have
...
the
...
effect
...
of
...
a
...
vertical
...
offset.
...
A
...
kinematic
...
result
...
of
...
this
...
modeling
...
technique
...
is
...
the
...
generation
...
of
...
longitudinal
...
forces
...
which
...
act
...
on
...
an
...
arm
...
about
...
the
...
neutral
...
axis.
...
If
...
this
...
behavior
...
is
...
not
...
desired,
...
one
...
support
...
may
...
be
...
changed
...
from
...
a
...
pin
...
to
...
a
...
roller
...
condition
...
such
...
that
...
horizontal
...
reactions
...
are
...
released.
...
This
...
behavior
...
may
...
be
...
exhibited
...
when
...
...
...
are
...
supported
...
by
...
...
...
located
...
at
...
the
...
bottom
...
of
...
the
...
bridge
...
girders.
...
Presented in Figure 1 are visuals which depict how standard and offset objects:
- Are displayed in the software interface.
- Are kinematically related to the analytical model.
- Respond under flexural loading.
The images from Figure 1, as they appear in SAP2000, are given in Figure 2:
See Also
- Area-object offset article
Attachments
- SAP2000 V14.2.3 model (zipped SDB file)