multi-point constraint displacement controlled pushover

[mbazan]

I need to carry out a multi-point constraint displacement controlled pushover analysis (static).

I need to impose either displacement histories to a single node along different degrees of freedom, OR impose displacement histories to different nodes.

Does anyone have any experience or ideas on doing this type of analysis? Your comments are appreciated. Thanks.

Marlon Bazan

[silvia]

i think you can do it with the sp command in the load pattern.

[jwaugh]

Silvia has it. Here how I do it on a regular basis, I needed to apply a displacement history to different DOF on the same node.


set SeriesPath1 "Path Series -dt 1 -filePath Y_Displ.txt"
set SeriesPath2 "Path Series -dt 1 -filePath Z_Displ.txt"

pattern Plain 2 $SeriesPath1 {
sp 8 2 1
}

pattern Plain 3 $SeriesPath2 {
sp 8 3 1
}

I hope that helps, the two files contain the displacement steps, just remember you can't use the plain constraint handler.

[mbazan]

Thanks Jon and Silvia. The SP command worked just fine.

[jwaugh]

Silvia,

Does this question show up often enough to add a example of it? I wrote a quick example for mbazan, do you want it?

[silvia]

YES, that would be awesome!!!

[hrodrigues]

can anyone send me these example ?

[silvia]

Here is the link:

https://central.nees.org/?projid=401&ac ... 20Examples

[hrodrigues]

Silvia
Thanks for the fast answer.

You save my day!!

Thanks a lot
Hugo

[silvia]

you are welcome to contribute back to the community once you have something interesting!!

[hrodrigues]

i hope to do it soon.