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Re: Seismic on restrained retaining walls[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Seismic on restrained retaining walls
- From: Tarek Mokhtar <Tarekmokhtar(--nospam--at)earthlink.net>
- Date: Fri, 25 Apr 2008 13:11:01 -0700
Title: Re: Seismic on restrained retaining walls
And the rule of thumb shall be to keep all of our retaining walls 11'-11" or less in height.
On Thu, Mar 20, 2008 at 9:12 AM, Hugh Brooks <hbap(--nospam--at)aol.com> wrote:
The Mononobe-Okabe equations do not apply to restrained walls where activation movement is restricted.
For seismic lateral on restrained walls Retain Pro uses P = (soil density) x (k<sub h>) x (retained height)^2. Application is approx. 0.60 x (retained height). This is a slightly trapezoidal loading but with only slight error a uniform loading could be assumed. K<sub h> is the acceleration factor appropriate to the site.
See Kramer, Geotechnical Earthquake Engineering, Section 11.6.2.
Hugh Brooks, SE
Retain Pro Software
Tarek Mokhtar, SE
TMM Structural Engineers, Inc
31645 S. Coast Hwy
Laguna Beach, CA., 92651
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