×
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

STAAD Base plate with hole using FEM strange results

STAAD Base plate with hole using FEM strange results

RE: STAAD Base plate with hole using FEM strange results

Hi,

can you explain why are you using 0.4*60MPa as your modulus of subgrade reaction, are you not mixing up strength and stiffness?

When you say (in point 1) that it is not capturing a real behaviour, can you explain in what way?

RE: STAAD Base plate with hole using FEM strange results

(OP)
I just assumed 0.4*60 as the bearing capacity of my concrete and that is strength.

Because the baseplate is sitting on concrete pier.

I am also not sure.

But I understand your point. If it is a soil then value of K would have to be Subgrade modulus / allowable displacement multiplied by influence area. But for this case can you correct me?

Because, if i run the analysis and take a look at support reactions it is not realistic. 2nd, the displacement if i animate, it is really not true.

But I cannot think of another way and what is i am missing.

It should'nt behave like that.

Actually this is my first time to do base plate on top of concrete pier. I just want to observe the extent of hole and see how it reacts with the stresses. Though I am confident that it shouldnt be an issue because it is outside the bearing area. But i just want to make sure and prove it.

what is your idea?

Regards,
E104909

 

RE: STAAD Base plate with hole using FEM strange results

I am not sure if it matters in why your results seem to be wrong, but Young's modulus of concrete is probably of the order tof 20,000N/mm2 .

I have no access to STAAD, so if you could post a sketch of your detail as well as screenshoot of your results where you can explain why are they wrong it would help.
 

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!


Resources