Data Assignment > Structural Boundary Conditions

 

Structural Boundary Conditions

Structural boundary conditions specify the way a structure is supported. The data items of the structural boundary condition are related to the constraining status of nodes at the boundaries. The status is defined for each nodal d.o.f., and is one of the following four.
 

free : free to move. In other words, no constraint is imposed.
 

  f ree with spring constant : partially constrained state like hinges with friction, elastic supports, etc. The degrees of constraint are represented by spring constants.
 

  fixed: No movement is allowed. The 0 displacement is prescribed. fixed with prescribed displacements : initial displacement, settlements, etc. The displacement is forced to be the prescribed value.

  In order to start assigning structural boundary conditions, choose "Structural Boundary" item in menu. "Struct Boundary" dialog appears, and current state of their assignment are displayed in the main window.