Return to index: [Subject] [Thread] [Date] [Author]

Re: Seismic loads, Mexican Code vs. UBC

[Subject Prev][Subject Next][Thread Prev][Thread Next]
According to the MOC-93, a seismic zone A represents a low-seismicity
region, and soil type III is a soft soil with deep deposits. Of course there
are some parameters that precisely define all these concepts, but in summary
the acceleration design spectra as a fraction of the gravity acceleration in
your specific case is as follows:

For T=0, a=0.05
For 0.6<T<2.9 sec, a=0.20
For T>2.9 sec, a=0.58/T

With this information you can easily find a correlation with UBC or any
other source. Best regards,

Javier Encinas
ASDIP Structural Software
-----Original Message-----
From: Tom.Hunt(--nospam--at)fluor.com <Tom.Hunt(--nospam--at)fluor.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Wednesday, April 05, 2000 6:16 PM
Subject: Re: Seismic loads, Mexican Code vs. UBC


>
>
>Gunnar,
>
>Seismic design in Mexico can be a little tricky.  They have a Federal code
>(Reglamento de Construcciones para el
>Distrito Federal, RCDF) but it technically only applies to the government
area
>in and around Mexico City.  For areas outside of Mexico City your
>best choice is the CFE code (Comision Federal de Electricidad) which is an
>industrial code that covers all of Mexico.
>
>It has been a while since I used either of these but I seem to remember
that
>after the 1985 Mexico City Earthquake, their designs are nearly
>kept in the elastic range.
>
>You may also find some good information in the US Army/Navy/Air Force
Seismic
>Design Manual No. 5-809-10.
>
>Thomas Hunt, S.E.
>
>
>
>
>
>"Gunnar Hafsteinn Isleifsson" <gunnarhi(--nospam--at)post4.tele.dk> on 04/04/2000
03:54:57 PM
>
>Please respond to seaint(--nospam--at)seaint.org
>
>To:   <seaint(--nospam--at)seaint.org>
>cc:
>
>Subject:  Seismic loads, Mexican Code vs. UBC
>
>
>A colleague of mine has been asked to evaluate seismic loads on a structure
>(steel silo, supported by a steel frame) where the design criteria is given
as
>follows:
>
>Design acceleration according to Mexican Code M.O.C-93: Zone A
>Horizontal Vo for "terreno typo III": 7.8 cm/s
>
>This is the only information we have been able to obtain as of now.
>Does anyone on the list know if this can be converted to an equivalent UBC
zone
>classification (UBC94 or UBC97)?
>
>Thank you
>
>Gunnar Hafsteinn Isleifsson
>Denmark
>
>
>
>
>
>
>
>
>