Follow these guidelines to model anchors with displacements in CAESAR II:
-
Enter only displacements for the node.
-
Do not specify restraints or anchors at the node to be displaced.
-
For anchors with displacements, ensure that all six degrees-of-freedom at the node are defined.
Degrees-of-freedom not defined (left blank) in any displacement vector are presumed to be free in all load cases.
You can define up to nine different displacement vectors.
Non-zero displacements are usually part of the thermal expansion effects. They should be added into any analysis case containing the corresponding thermal, such as W+P1+T1+D1. We recommend load cases that do this automatically.
The translations and/or rotations for any nodal degree of freedom that has displacements specified in any displacement vector are zero for the following load cases:
-
Those that do not contain a vector as part of the load case identification
-
Those where the specified non-zero value for load cases containing the vector is part of the load case identification
For example, defined displacements are used if the load case is W+P1+T1+D1 (OPE), and those displacements are held to zero if the load case is W+P1 (SUS).
After a degree-of-freedom is fixed in one displacement vector, it cannot be free in another displacement vector at the same node.
The default value for a blank displacement box is zero.
The figure below shows an anchor with predefined displacements.