Displacement and Force Time Series using Plain Pattern

[JoseLeo]

The following are undocumented commands that may be very useful in a variety of problems and applications, which I have tested in transient analysis and worked fine:

#Displacement time Series alternative to Multisupport pattern
# applies displacement series SP constraint at node 20, dof 2 (free), factor 1.0
pattern Plain 1 "Series -dt $dT -filePath DispFile.txt" {
sp 20 2 1.0
}

#Force time Series loading at node
# applies force time series load at node 30, dof 2, factor 1.0
pattern Plain 2 "Series -dt $dT -filePath ForceFile.txt " {
load 30 0 1.0 0
}

[fmk]

the difference to multi-support is that you define multiple support motions inside a single load pattern, your approach would require a load pattern for each different ground motion.