Enter specified (forced) nodal displacements, or modify or delete previously
entered specified (forced) displacements.
From the Main
Menu select Load > Specified Displacements of Supports.
Select Static Loads
> Specified Displacements of Supports in the Menu tab of the Tree Menu.
Load
Case Name
Assign the load case
name. Click to the right to enter additional load cases,
and modify or delete existing load cases.
Load
Group Name
Select the desire Load
Group that will include the entered Specified Displacements of Supports
data. Select "Defualt", if a Group assignment is unnecessary.
Click to the right to add, modify or delete Load Groups.
Options
Add:
To enter new or additional specified displacements at selected nodes assigned
with constraints
Replace:
To replace previously entered specified displacements at selected nodes
assigned with constraints
Delete:
To delete previously entered specified displacements at selected nodes
assigned with constraints
Displacements
(Local Direction)
Enter specified displacements
with respect to the GCS or nodal local coordinate system.
If the nodal local coordinate
system has already been defined for specific nodes the data for the nodes
are entered with respect to the NCS.
Dx:
GCS or nodal local x-direction component of the specified displacement
Dy:
GCS or nodal local y-direction component of the specified displacement
Dz:
GCS or nodal local z-direction component of the specified displacement
Rx:
Specified rotation component about GCS or NCS X-axis
Ry:
Specified rotation component about GCS or NCS Y-axis
Rz:
Specified rotation component about GCS or NCS Z-axis
Note 1
The specified displacements are considered as load cases in MIDAS/Gen.
Thus, the specified displacements can be combined with other load cases.
Note the following when generating load combinations in a model applied
with specified displacements.
If specified displacements are assigned
to a node, the relevant degrees-of-freedom of the node are automatically
constrained.
The nodes assigned with
specified displacements behave like Support
even for other
load cases that do not contain
specified displacements.
In other words, the function
serves to define "Specified Displacements of Supports" in midas.
Note
2
When the specified displacements are entered
at the specific construction stage, the load case for the specified displacement
is assigned to CS : Dead load or CS :
Erection.
But the specified displacement is applied
based not on the CS : Dead load or CS : Erection, but on the CS : Summation.
For example, if the nodal displacements in the preceding stage are shown
in the table below and the user enter +0.1 as the specified displacement,
the specified displacement of 0.5 will be applied in order to obtain the
final displacement (Dead + Creep + Shrinkage + Tendon) of 0.1.
Load
Case Name
to the right to enter additional load cases,
and modify or delete existing load cases.