OpenSees Command for the Domain Reduction Method

The syntax of the DRM command is :

pattern PBowlLoading loadpattrnTag? -pbele PBElmentFile? -acce acceFile? -disp dispFile? -dt dt? \(<\)-factor factor?\(>\) -xp +X? -xm -X? -yp -Y? -ym -Y? -zp +Z? -zm -Z?

where pattern and PBowlLoading are key words. loadpattrnTag? is the tag for this loadPattern. A user needs to supply an element file, acceleration file, displacement file following the identifiers -pbele, -acce and -disp, respectively. dt? is the time increment in the input data and is a parameter following identifier -dt. factor? is an optional parameter for scaling the equivalent forces. If not supplied, a default value 1.0 will be used. In particular, the interior boundary of the boundary layer is input by a set of coordinates, i.e. +X, -X, +Y, -Y, +Z and -Z, as shown in Figure 1.

[PBDefinition] Sketch showing coordinates of the interior boundary.