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RE: Seismic Earth Pressures on Cantilever Retaining Walls

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There is an improved ( or amended ) version of the
Mononobe-Okabe method developed by the ATC
( I don't have the number right now, can provide it later).
At least this is a study from the 80's, and I think, it's a source
document for AASHTO guidelines.
Eurocode 8, is also very good in these matters.
HTH.
R. Labbé
-----Mensaje original-----
De: Nick Arenson <narenson(--nospam--at)olymandalay.com>
Para: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Fecha: Lunes, 29 de Octubre de 2001 01:31 p.m.
Asunto: Seismic Earth Pressures on Cantilever Retaining Walls


>What is the state of the practice regarding seismic pressures on cantilever
>retaining walls?  Mononobe-Okobe (1926) developed a method and it has been
>extended through the years.
>
>We've all realized that peak ground accelerations can be significant in
near
>fault areas.  The formulation of M-O sort of falls apart at high
>accelerations because (it appears to me at least) the underlying
assumptions
>can not deal with high accelerations (there is actually a combination of
>effects such as slope of backfill, friction angle, etc.,  that make the
>formulation break down).
>
>The Seed Whitman formulation (1970) seems to still apply (mainly because it
>is a vast simplification and the nasty formulation details go away).
>
>What are people using these days?
>
>Nick Arenson
>
>
>
>
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