×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

RISA Foundation - apply multiple loads to single spread footing

RISA Foundation - apply multiple loads to single spread footing

RISA Foundation - apply multiple loads to single spread footing

(OP)
I have a vertical tank on a circular base plate four anchor bolts. I modeled the tank in RISA 3D with 4 pins (each representing one anchor bolt) and as such have four nodes where I have reactions.

When I bring this over to RISA-Foundation, I would like to size a single spread footing to handle these loads. If I apply a single spread footing to a node that is in the middle of the four nodes, the point loads are not applied at the top of the spread footing.

What is the best way to model a spread footing with multiple loads like this?

My current method is to model things differently - instead of modelling where I have 4 pins, I just included a single fixed boundary point in the middle of the bolt circle, and use those results for my spread footing design. This does work, but I wanted to reach out to see if there are other ways that people suggest going about this.

RE: RISA Foundation - apply multiple loads to single spread footing

This is a little late, but since it sounds like you may do something like this frequently, here is my response.

When analyzing multiple points from 3D in Foundation, I would not use the spread footing function. Instead, I would draw in a slab element in Foundation. If this is sitting on piers on top of the footing, you can then draw a pier at each support point to fully capture reactions as they are generated from 3D forces.

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


Resources

White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now

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