To assign a support which can have a support
displacement imposed as a load, use the following procedure.
In
STAAD.Pro, a special support type is used for
supports that will have an imposed displacement as part of a load case. These
are called
enforced
supports.
Note: If no support displacements are defined for an enforced support,
then this support behaves as a fixed support (i.e., no translation or
rotation). Similarly, an enforced but support behaves like a corresponding
fixed but support if no support displacements are defined.
-
Select the nodes that will have the same support condition.
-
On the
Specifications ribbon tab, select the
tool
in the
Supports group.
-
Select one of the drop-down support types as follows:
Support condition… | Select
the following other support… |
---|
fixed in all degrees of freedom |
Enforced
|
released in one or more degrees of
freedom |
Custom Enforced
|
To impose a displacement on a joint with releases (e.g., a
pinned
support), you must use a custom enforced (i.e.,
ENFORCED BUT
) support type and define the released
degrees of freedom.
The
Create Supports dialog opens to the
corresponding tab.
- Optional:
For an enforced but support type, check the
Releases for this support type.
For example, to create a
pinned
type support, you would check the
MX,
MY, and
MZ release options.
-
Either:
To… | Do the following… |
---|
add the support type to the
model and assign to the current node selection |
click
Assign. |
add the support to the
model for later assignment |
click
Add. |
The dialog closes.
You must create a load case with support displacements defined at nodes
with enforced or enforced but support types assigned in order for this support
type to have an effect on your model beyond behaving as a corresponding fixed
or fixed but support.