×
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

StaadPro Buckling Analysis

StaadPro Buckling Analysis

StaadPro Buckling Analysis

(OP)

I need someone to show me the steps to perform buckling analysis in staadpro.
E.g: A steel strut 0.15m diameter and 12m long, built in rigidly at the bottom but completely unrestrained at the top. Ans = 89.4kN. Take E= 205GPa.
I have tried tirelessly but still cannot get the correct factor.
Please do help by sending me a stepwise description of the process and possibly a staadpro file containing the solution.
Thanks.
atika4ufolks@yahoo.com

RE: StaadPro Buckling Analysis

Sorry, I cannot halp you with STAADpro. In danger of being regarded as overly pessimistic, I would be very careful with doing buckling analysis with numerical methods. A buckling analysis is very dependent on geometry. And the real geometry (reality) is not perfect, whereas the numerical system assumes it is. (just try to model a perfect (100% straight) strut and one with a slight imperfection, you will see ahuge difference in buckling load) Of course you can include uncertainty factors, and with the right parameters and large safety factors you can calcualte a reasonable buckling load. I prefer hand calculations or non-linear buckling analysis.

RE: StaadPro Buckling Analysis

I can't help with STAADPro either, but a linear buckling analysis should give a result very close to the Euler buckling load, and to a non-linear buckling analysis.

Based on the information provided the numbers I get are:

Euler buckling load: 87.29 kN
Linear buckling analysis (1 segment): 87.95 kN
Linear buckling analysis (10 segments): 87.29 kN
Non-linear buckling analysis (10 segments): 87.47 kN

What buckling load are you getting from your STAADPro analysis?

Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/

RE: StaadPro Buckling Analysis

(OP)
Thanks everyone.. Sorted myself out already. I was modelling wrongly initially using staad plane instead of space. Got 87.29kN.
Thanks.

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