About plasticDeformation recorder

[Najafi Yousef]

Dear Silvia

Would you please explain the below recorder and the format of its output;
recorder Element -file PDef.out -time -ele 1 plasticDeformation

Why I can’t find this recorder in ‘OpenSees Command Language Manual’?

Thanks before

[silvia]

i still have to figure out these recorders myself.

[Najafi Yousef]

Hi Silvia

I learn this recorder from Dr. Erol Kalkan and he learns it from Frank, but I am confused about its output now! Pleas clarify me.

Thanks before

[rjaeger]

Hi,

If you want to understand the output, go to the source code and see what is being output for the element you are referencing. Recorder commands are handled by the setResponse function in the element's .cpp file. You can browse through the elements here: http://opensees.berkeley.edu/cgi-bin/cv ... C/element/

As an example, if you are using the 2D force beam column, you should go to element/forcebeamcolumn/forcebeamcolumn2d.cpp. From here you should download the source file by clicking on download (the first in the list is the latest revision of the file).

Now if you search for setResponse, it takes you right to the recorder commands. From here, you can find the plasticDeformation trigger like this:

Code: Select all

// plastic rotation -
  } else if (strcmp(argv[0],"plasticRotation") == 0 || strcmp(argv[0],"plasticDeformation") == 0) {

    output.tag("ResponseType","epsP");
    output.tag("ResponseType","thetaP_1");
    output.tag("ResponseType","thetaP_2");

    theResponse =  new ElementResponse(this, 4, Vector(3));

Unfortunately, I am not familiar with the structural elements so I cannot interpret these variables.

Robbie