Search found 610 matches

by mhscott
Wed Aug 04, 2021 4:51 pm
Forum: OpenSees.exe Users
Topic: Modeling steel pipe as beam column
Replies: 1
Views: 17

Re: Modeling steel pipe as beam column

Welcome to OpenSees! First, read this: https://portwooddigital.com/2019/09/14/no-caps-when-you-spell-the-frameworks-name/ Next, you'll want to look at using fiber sections where you can define the section geometry with a circular patch. https://openseespydoc.readthedocs.io/en/latest/src/patch.html O...
by mhscott
Mon Aug 02, 2021 7:43 pm
Forum: OpenSeesPy
Topic: OpenSeesPy run for Mac OS M1
Replies: 3
Views: 61

Re: OpenSeesPy run for Mac OS M1

Search online for how to install a specific version of a Python package.
by mhscott
Sun Aug 01, 2021 8:29 pm
Forum: OpenSeesPy
Topic: OpenSeesPy run for Mac OS M1
Replies: 3
Views: 61

Re: OpenSeesPy run for Mac OS M1

I'm not so sure it will run on the M1 chip. You can try downgrading openseespy to see if that makes a difference.
by mhscott
Sat Jul 31, 2021 6:47 am
Forum: OpenSeesPy
Topic: WARNING FE_Element::setID() issue
Replies: 2
Views: 62

Re: WARNING FE_Element::setID() issue

Brick elements only work with ndm=3 and ndf=3. Try changing your model to ndf=3.
by mhscott
Fri Jul 30, 2021 1:47 pm
Forum: OpenSees.exe Users
Topic: Update parameter at every time step
Replies: 3
Views: 101

Re: Update parameter at every time step

Added the methods so that R or Reff can be treated as a parameter

https://github.com/OpenSees/OpenSees/pull/635/files
by mhscott
Thu Jul 29, 2021 11:42 am
Forum: OpenSees.exe Users
Topic: Modelling issue
Replies: 4
Views: 130

Re: Modelling issue

Thanks!

This looks like something you can do pretty easily in an input script and does not require implementation in the core OpenSees.
by mhscott
Thu Jul 29, 2021 8:24 am
Forum: OpenSees.exe Users
Topic: Modelling issue
Replies: 4
Views: 130

Re: Modelling issue

It kinda sounds like the soil column with dashpot approach to inputting a ground acceleration.

See Figure 4 of this paper (http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0001353) and the references therein. It's fairly common in earthquake SSI.
by mhscott
Thu Jul 29, 2021 6:57 am
Forum: OpenSees.exe Users
Topic: Modelling issue
Replies: 4
Views: 130

Re: Modelling issue

Interesting. Could you provide some figures describing the approach? The link is good, but a visual representation of the large mass method would help a lot.
by mhscott
Wed Jul 28, 2021 10:20 am
Forum: OpenSees.exe Users
Topic: Update parameter at every time step
Replies: 3
Views: 101

Re: Update parameter at every time step

You can use updateParameter inside the loop, but it looks like these functions aren't implemented for this element. I can add the functions and it will be available in the next release.
by mhscott
Wed Jul 28, 2021 10:14 am
Forum: OpenSeesPy
Topic: How to control displacement of multi-node?
Replies: 1
Views: 83

Re: How to control displacement of multi-node?

You can use sp constraints inside a load pattern: https://portwooddigital.com/2021/02/07/ ... d-control/
by mhscott
Sat Jul 10, 2021 5:41 am
Forum: OpenSeesPy
Topic: Consistent units issue
Replies: 1
Views: 165

Re: Consistent units issue

You have to ensure the units are consistent with your input. OpenSees does not convert units.
by mhscott
Fri Jul 09, 2021 8:29 am
Forum: OpenSeesPy
Topic: Trapezoidal load problem
Replies: 2
Views: 249

Re: Trapezoidal load problem

When I run the script, I get the correct reactions for triangular load on a cantilever
vertical reaction - 15
moment reaction - 50
by mhscott
Thu Jul 08, 2021 11:26 am
Forum: OpenSees.exe Users
Topic: expected integer but got "-dir"
Replies: 4
Views: 229

Re: expected integer but got "-dir"

OK, I think I know what you mean.

Put a statement at the end of your script, like puts "a". There's some kind of parsing error that's not obvious. It happens with other elements too.
by mhscott
Thu Jul 08, 2021 10:30 am
Forum: OpenSees.exe Users
Topic: expected integer but got "-dir"
Replies: 4
Views: 229

Re: expected integer but got "-dir"

I'm not sure what you mean that it works normally when "sourced"