OVERVIEW
Boundary conditions represent the status of connections between the structure and neighboring structures such as foundations. Boundary conditions are distinguished by nodal boundary conditions and element boundary conditions.
Nodal boundary conditions:
 The constraint for the degree of freedom
 Elastic boundary element (Spring support)
 Elastic link element (Elastic Link)
Element boundary conditions:
 Element end release
 Rigid end offset distance (Beam End Offset)
 Rigid link