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Re: LPILE or Other (Laterally Loaded Pile Analysis)

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We have a program that calculates the pile head displacement and distributes
the load among the individual piles in a pile group foundation, based on the
Hrenikoff approach. This considers the soil-structure interaction and
therefore is a much better solution that the common P/n +- M/S. Piles can be
vertical or batter and pinned or fixed at top. Check our web site at
www.asdipsoft.com for more details and a demo download. Regards,

Javier Encinas
ASDIP Structural Software
----- Original Message -----
From: Reynold Franklin <rfranklin(--nospam--at)STUEVE.COM>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, March 13, 2002 10:34 AM
Subject: RE: LPILE or Other (Laterally Loaded Pile Analysis)


> Bill:
>
> Check this web site.
> http://www.engineering-architectural-design-software.com/
>
> There is another site which I saw recently in one of the magazines.
Turned
> the last two issues of all my magazines but no luck.  I have StaadPro 2000
> suit and one of its components in Staadetc is lateral loading on pile.
> Check that one too because I believe there is an option to rent it from
the
> manufacturer. I hope this helps.
>
> Reynold Franklin, Ph.D., P.E.
> Project Manager
> Stueve Construction Co.
> 2201 East Oak Street, Algona, IA 50511
> (515) 295-3110
>
>
> -----Original Message-----
> From: Bill Polhemus [mailto:bill(--nospam--at)polhemus.cc]
> Sent: Tuesday, March 12, 2002 11:52 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: LPILE or Other (Laterally Loaded Pile Analysis)
>
>
> That's an idea, but to tell you the truth I'd rather do this analysis
> myself. I don't mind having the geotech giving me the data needed in the
> report but I like doing the foundation design myself not having it done
for
> me.
>
> To tell the truth I have a nice "closed form solution" for doing a pretty
> close estimate of the pile head movement and (especially) the maximum
moment
> in the pile. It is based upon a paper that was presented a few years ago
at
> the Texas Section ASCE meeting, and I've received a copy of it from the
guys
> who put it together.
>
> Essentially, they took several hundred LPILE runs, and collated the data
> then did a very fancy curve fit. The result is a ponderous-looking
equation
> which nevertheless is easy to solve using e.g. Mathcad's ROOT function.
>
> But there are a few limitations on their method and the authors state that
> it is for "preliminary design" and should be followed-up with a more
> extensive analysis using LPILE or similar.
>
> One of the limitations is that it assumes a value for (50  (that's
> Epsilon-sub-50) of 0.01. The soil report I'm using recommends a value of
> 0.005. I'm not all that conversant as to how sensitive the analysis is to
a
> change in the value of (50  (Epsilon-sub-50), but I wanted to explore that
> for myself.
>
> It seems to me, btw, that since (50  (Epsilon-sub-50) is defined as "the
> strain at one-half the ultimate shear stress of the soil" that a value of
> 0.005 would indicate a STIFFER soil than that of 0.01 and thus any
analysis
> would be more conservative at the higher value, but I don't know the
> details.
>
>
>
> William L. Polhemus, Jr. P.E.
> Polhemus Engineering Company
> Katy, TX, USA
> Phone (281) 492-2251
> FAX (281) 492-8203
> email bill(--nospam--at)polhemus.cc
>
>  -----Original Message-----
> From: Scott Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu]
> Sent: Tuesday, March 12, 2002 10:35 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: LPILE or Other (Laterally Loaded Pile Analysis)
>
> Bill,
>
> Your other option is to hire a geotech company that has LPILE to run the
> analysis for you.  This can be an especially good option if you have
> already sub'd out for a geotech report (which you would need to do anyway
> to get the necessary soil information for input into LPILE).  Just have
> the geotech company provide the lateral analysis as part of their geotech
> services.
>
> HTH,
>
> Scott
> Ypsilanti, MI
>
>
> On Sun, 10 Mar 2002, Bill Polhemus wrote:
>
> > Does anyone know if the latest version of the LPILE (PLUS?) software is
> > available anywhere for rent? Once every blue moon I have a laterally
> loaded
> > pile problem to solve, but it isn't worth paying the $900 or so for this
> > software. Seems like LPILE would be a perfect candidate for rental.
> >
> > Otherwise, does anyone know of a similar program for prediction of
> response
> > of piles under lateral loading, available at low or no cost?
> >
> > Thanks.
> >
> >
> >
> > William L. Polhemus, Jr. P.E.
> > Polhemus Engineering Company
> > Katy, TX, USA
> > Phone (281) 492-2251
> > FAX (281) 492-8203
> > email bill(--nospam--at)polhemus.cc
> >
> >
> >
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