Zerolength Element Recorder Question

[antiquewy]

Hi all,

I have encountered a problem about how to get the output for a zerolength element.

When I follow the example of Pinching4 material, which is a 2D case, I got the axial force in zerolength spring element by using the recorder command as:

recorder Element -file [list $output_dir/$filename_Force.out] -time -ele 1 glocalForce

But when I made a 3D structure model with elastic -beam column, rigid diaphragm and zerolength element spring, it does not work. The recorder command could not record any force in the file but the time step. The code is:

element zeroLength 83 83 100 -mat 6 -dir 1;
recorder Element -file $dataDir/Fspring.out -time -ele 83 globalForce;

By the way, the model itself is correct and the modal analysis and dynamic analysis can be done. I just wonder how can I get the force in the zerolength spring element?

I have tried localForce instead of globalForce, it does not work either. Maybe I can use other option such as nodal reaction? If so, does reaction force include inertial force?

Thanks very much.

[fmk]

zeroLength element only responds to "forces" .. don't know what the element was in the other example, but it probably wasn't a zeroLength element.

[silvia]

intersting that

glocalForce

gave you results....

[antiquewy]

Thanks fmk and silvia

I try the ''forces'' instead of ''globalForce'' and it works.

For silvia, I just paste a wrong word and it should be "globalForce", not "glocalForce". Nevertheless, I got output for 2D model by using "globalForce".

[silvia]

i think because in 2D it does not use the transformation information for coordinates, it does it automatically....