sp Command

This command is used to construct a single-point constraint object and add it to the enclosing LoadPattern.

sp $nodeTag $dofTag $dofValue

$nodeTag, integer, tag of node to which constraint is applied. $dofTag, integer, the degree-of-freedom at the node to which constraint is applied (1 through ndf) $dofValue, integer, reference constraint value.

Note

The $dofValue is a reference value, it is the time series that provides the load factor. The load factor times the reference value is the constraint that is actually applied to the node.