Pipe pile response in soil

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mlw
Posts: 49
Joined: Sun Feb 20, 2011 7:27 pm
Location: New Zealand

Pipe pile response in soil

Post by mlw » Mon Jun 11, 2012 3:01 pm

Hi all,

I have been comparing the OpenSees pile bending moments against case history data for seismic shaking table and centrifuge experiments. I have compared 4 case histories.
What I am finding is that OpenSees seems to underpredict pile bending moments of the thin walled pipe piles, but has no problem with thick walled pipe piles and solid piles.

I am using the elasticBeamColumn pile materaial, and have attached my pile to the surrounding soil elements by other elasticBeamColumnElements, similar to the pile and rigid-link combination employed in OpenSeesPL.

I have also been in contact with another postgrad student who is using OpenSees for his research, and he has found the same problem.

Has anyone else encountered this prolem - and how was it fixed?
Or could it be that the pile and rigid-link combination is not capturing the pile response during earthquake shaking?

mlw

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