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Re: pier design[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: pier design
- From: BVeit <BVeit(--nospam--at)aol.com>
- Date: Fri, 6 Mar 1998 12:22:02 EST
In a message dated 98-03-05 21:07:12 EST, arvelw(--nospam--at)netplus.net writes in response to Martha Alic's pier design question: << Also check out Bowle Fifth Edition of his text. It is usually straight forward and has alternative methods. >> I use Bowles also. Because of the way he sets his method up, if you model the pier using springs with stiffnesses based on the soil stiffness and the area of the pile, you can get answers identical to Bowles. I use Visual Analysis, but I'm sure any package would work. It is a good way to go because you can model constraint (say through a collar) with a stiffer spring. It shows you the moment and shear throughout the pier, just as Bowles does. This method also allows some flexibility for stratified soils. The only problem with it: It's like pulling teeth to get a soils engineer to give a realistic soil elasticity modulus (aka spring constant.) Short of an actual pile test, I don't know how to estimate one either, so the modulus numbers tend to be the loosest part of the whole process. Can anyone comment on how L-Pile gets around this difficulty? Doesn't the finite difference method used in L-pile do basically the same thing as Bowles?
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