×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

RISA 3D - Hard Panels

RISA 3D - Hard Panels

RISA 3D - Hard Panels

(OP)
Hello,

In many cases the widths of walls do not comply with the NDS' width aspect ratio. I believe RISA 3D has the capability of customizing properties of materials for design. That being the case I want to use products such as Simpson Wood Strong-Wall, Steel Strong-Wall, or Hardy Panels in my RISA model.

Do I find the mechanical properties of the Simpson or Hardy Frame panels and insert them in the "Materials" properties?

OR

Is there a way to insert in spreadsheet style all of the allowable values for resisting lateral loads of these products? (the same way as for Wood Panel Shear Walls or Holdowns all ready in the RISA software).

Thank you for your time engineers!

RE: RISA 3D - Hard Panels

The options for these types of products are limited:

Option #1: Use some customized plate / shell elements with non-isotropic properties to mimic the various stiffnesses of the product.... This is actually how RISA-3D internally handles wood shear walls. Using some properties for axial compression of the wall, others for shear. However, I don't believe they allow the users to manually create non-isotropic plate elements. Honestly, even if they did, this is a pretty complex modeling effort. Even power users could easily make mistakes.

Option #2: Use RISA's pre-built wall elements with various studs and shear panels and such. Unfortunately, this won't work because RISA will automatically de-rate the stiffness of panels that violate the NDS aspect ratio limits.

Option #3: Probably the only one that will work. Use a frame element to mimic the strong wall. This requires converting the wall stiffness into a moment of inertia, cross sectional area and shear area factor. But, that's pretty much the only way I can see to do it.

Note: It is possible (though probably unlikely) that RISA could add a feature for this type of wall in the future. I know the development staff is up to the task. The main problem (as I see it) is that they don't have any engineers left who were around when they originally developed the wood walls. Therefore, I'm not sure I trust them to understand how to modify the existing elements to work properly for these products.

RE: RISA 3D - Hard Panels

(OP)
Thank you @JoshPlum

It is a shame that the option is not available.Hope they can figure that out.

I will try your third suggestion for the mean being.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close