Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Is there any FEA software capable of applying parabolic loads without me making linear approximation 1

Status
Not open for further replies.
ITsSB

ITsSB

Structural
May 6, 2022
30
I have an RC Pipe and I want to apply parabolic loads to its base and see its response. So far I have been told to approximate it with equivalent trapezoidal loads. My problem is the slope of the curve changes rapidly(narrow curve)that I would need too many approximations. So, is there any FEA software to apply a parabolic load as it is (or takes less effort to make decent approximation) or any other suggestion is welcomed.
Standard_Installations_qvkqp7.png
 
Replies continue below

Recommended for you

Sort by date Sort by votes
I would probably calculate node loads in a spreadsheet, then apply the loads as node loads.

I won't comment on the strange loading :)


Doug Jenkins
Interactive Design Services
 
Upvote 0 Downvote
Strand7 will let you input any load according to whatever function you like, e.g. parabolic, sinusoidal, exponential, whatever
 
Upvote 0 Downvote
I agree with @IDS, put as much as nodes you can, the greater the number the more accurate your prabolic distribution will be. Calculate the load on each node in an excel sheet then transfer it to the software. I use SAP2000 usally. you can export or import data from excel sheet.
 
Upvote 0 Downvote
How do you plan on building your model? The answer may depend on what elements you use but ultimately the loads will probably be applied on nodes.
 
Upvote 0 Downvote
@bugbus I tried to model the cross section of the pipe as a beam element but I couldn't apply the parabolic load. Do I just write the equation of the function on beam attributes? what parameters does the function use or can you redirect me to some good tutorial.
 
Upvote 0 Downvote
Not many of the FEA programs geared towards the Structural Engineering market (to my knowledge) can do parabolic loads.

I've typically done one of two things:
a) Piecewise linearly varying distributed loads, breaking the load into a different load ever 10% of the member length. That gives a pretty good representation of a parabolic load.

b) Or, just add joint loads along the length of the member and vary those loads.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Serhiy2
  • Question
Is there such a requirement as minimum length for groove welds? 1
Replies
3
Views
3K
Lomarandil
Lomarandil
Aytacoglu
  • Question
Temporary Propping - Factor of Safety for Loads
Replies
8
Views
3K
phuduhudu
phuduhudu
m_ridzon
  • Question
What is Significance of 33Hz in Seismic?
Replies
4
Views
1K
JoshPlumSE
JoshPlumSE
Greenalleycat
  • Locked
  • Question
Reduced loads on retaining wall in front of rock 1
Replies
10
Views
197
Greenalleycat
Greenalleycat
reverbz
  • Locked
  • Question
Leveling a shearwall without uplift 1
Replies
4
Views
90
lexpatrie
lexpatrie

Part and Inventory Search

Sponsor

Back
Top Bottom