Sometimes Tags Don’t Matter

When building a model in OpenSees, you have to ensure that you have unique tags for your domain components (nodes, elements, patterns, time series, parameters, etc.), reliability components (random variables, limit state functions, etc.), and model building components (materials, sections, beam integrations, etc.). If you define a duplicate tag, you will get an error message. … Continue reading Sometimes Tags Don’t Matter →

OpenSees 12345

In the early 2000s, when the Tcl interpreter was taking shape for OpenSees, Frank used a dummy tag 123456789 to determine if a load pattern had already been defined while parsing the load and sp commands. Here is the 2001 source code for TclModelBuilder.cpp--clearly written by Frank because he does not capitalize anything when he … Continue reading OpenSees 12345 →