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

Problem with RC slab bending moments

Problem with RC slab bending moments

Problem with RC slab bending moments

I don't have much experience using FEA for floor slabs and I can't figure out what I'm doing wrong. I've been trying to work out example problem 3 on page 105 in this document:http://etd.gatech.edu/theses/available/etd-07182005-45247/unrestricted/deaton_james_b_200508_mast.pdf. The total factored load comes out to about 232 psf.Based on that I loaded each of the 5657 nodes with 226 lbs. When I run the stiffness analysis, I get very low moments (Mxx and Myy) according to the finite element contours, nothing greater than 50 kip-in/in. I've tried all sorts of different support conditions but It doesn't help much. I've
attached the macro I used to create the slab, including the rigid bodys,columns and loads, I use GTSTrudl 27. Any help would be greatly appreciated.

RE: Problem with RC slab bending moments

not familiar with the actual data entry required by the code, but am a bit concerned with loading "each" element with 226 lbs/ft2, rather than the load magniture for a given element


RE: Problem with RC slab bending moments

Thanks for you respondse hacksaw,
I finally figured out what I was doing wrong.

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


White Paper - Implementing a Multi-Domain System
IoT systems are multi-domain designs that often require AMS, Digital, RF, photonics and MEMS elements within the system. Tanner EDA provides an integrated, top-down design flow for IoT design that supports all these design domains. Learn more about key solutions that the Tanner design flow offers for successful IoT system design and verification. 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