Constraints commands

In OpenSees there are two types of constraints:

1. Single Point constraints which prescribe the movement (typically 0) of a single dof at a node. There are a number of commands for defining single-point coonstraints:
   • fix
   • fixX
   • fixY
   • fixZ
2. Multi-Point constraints which prescribe that the movement of certain dof at one node are defined by the movement of certain dof at another node. There again are a number of commands for defining multi-point constraints.
   • equalDOF
   • rigidDiaphragm
   • rigidLink