From: "Gary Chock, S. E." <engineers(--nospam--at)martinbravochock.com>
Date: Thu, 13 May 1999 09:51:55 -0700
I believe that both of you may be somewhat off-track insofar as the
modeling for this type of analysis. Laterally loaded piles and caissons
behave in a nonlinear response, mostly governed by the soil effective
modulus which is dependent on displacement. This affects the resulting net
deflection, point of inflection, and moments in the pile/caisson. You
should probably consult with a geotechnical engineer on this problem;
specialized software has already been developed for this application, but
it requires both geotechnical expertise input and structural definition of
the cracking and plastic moment capacities of the pile/caisson. This is a
very much a procedure in pushover analysis, not elastic analysis.
At 11:21 AM 5/13/99 -0700, you wrote:
>I haven't used Risa 3d, but piles can be modeled using horiz springs spaced
>at say 1ft vertically with the spring stiff based on the the soil mod the
>geotech gives you (or should give you).
>Lanny J. Flynn, P.E., S.E.
>From: Mark D. Baker <shake4bake(--nospam--at)earthlink.net>
>To: seaoc <seaint(--nospam--at)seaint.org>
>Date: Thursday, May 13, 1999 11:10 AM
>Subject: fem & caissons
>>Has anyone had success trying to model an embedded pile subject to
>>lateral loads with Risa3d ? I know vertical load can be assessed for a
>>spread footing modelling plate/shell elements but I'd like to try it
>>with a round drilled, cast-in-place pile. Any body had success or
>>failure with this they would like to share?
Martin, Bravo, & Chock, Inc.
1132 Bishop Street, Suite 1550
Honolulu, HI 96813