Plain Pattern

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This commnand allows the user to construct a LoadPattern object. Each plain load pattern is associated with a TimeSeries object and can contain multiple NodalLoads, ElementalLoads and SP_Constrait objects. To construct a load pattern and populate it, the following command is used:

<uml> abstract class ElementLoad abstract class TimeSeries LoadPattern o- "one" TimeSeries LoadPattern o- ElementLoad LoadPattern o- NodalLoad LoadPattern o- SP_Constraint </uml>

The command to generate a multi-support excitation contains in { } the commands to generate all the ground motions and the single-point constraints in the pattern. The command is as follows:

pattern Plain $patternTag {

groundMotion...

imposedMotion...

...

}

NOTES:

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.

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$patternTag	unique tag among load patterns
groundMotion...	command to generate a ground motion
imposedMotion ...	command to generate an imposed motion

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Code Developed by: fmk