4.8.3. Multi-Support Excitation PatternΒΆ

pattern('MultipleSupport', patternTag)

The Multi-Support pattern allows similar or different prescribed ground motions to be input at various supports in the structure. In OpenSees, the prescribed motion is applied using single-point constraints, the single-point constraints taking their constraint value from user created ground motions.

patternTag (int) integer tag identifying pattern


  1. The results for the responses at the nodes are the ABSOLUTE values, and not relative values as in the case of a UniformExciatation.
  2. The non-homogeneous single point constraints require an appropriate choice of constraint handler.