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RE: DYNAMIC ANALYSIS VS STATIC ANALYSIS

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Many of the municipalities in the New Madrid Seismic Zone area use the BOCA
code.  There were over 1000 earthquakes from 1811 to 1812 in New Madrid,
Missouri.  Three of these earthquakes were as large or larger than the 1906
San Francisco earthquake. The effected area ranged to Chicago, and the felt
area ranged to Boston.  (Re: The New Madrid Earthquakes by Penick)

The largest spectral accelerations (300% g, 0.2 second, 2% in 50 years and
100% g, 1.0 sec in 50 years) per the 2000 NEHRP maps are in the New Madrid
Seismic Zone. 

On the issue of the BOCA itself, I do not have a 99 BOCA.  I do have the
1996 which was derived from and allows use of the ASCE 7 in lieu of the BOCA
provisions.  The ASCE 7 evolved from the NEHRP.  The 1999 BOCA was derived
from the NEHRP.  I would go through the ASCE 7 and use the allowed
reductions.

Regards,
Harold Sprague
The Neenan Company


-----Original Message-----
From: Greg Smith [mailto:strusup(--nospam--at)gte.net]
Sent: Wednesday, October 20, 1999 8:52 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: DYNAMIC ANALYSIS VS STATIC ANALYSIS


Without getting into code particulars, the UBC is more often employed in
high seismic risk zones and the BOCA is more often for the lower risk zones.

Greg
-----Original Message-----
From: Arvind K. Bisarya <arvind_bisarya(--nospam--at)mk.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Cc: bisarya(--nospam--at)aol.com <bisarya(--nospam--at)aol.com>
Date: Tuesday, October 19, 1999 3:30 PM
Subject: DYNAMIC ANALYSIS VS STATIC ANALYSIS


>
>
>         I  KNOW  THAT  IT  IS  A  U. B. C.  COUNTRY, BUT SOMEONE  CAN
>HELP  ME OUT  ON  A QUESTION  ABOUT  BOCA99.
>
>        U.B.C.  SECTION  1631.5.4  PROVIDES  FOR  REDUCTION  OF  ELASTIC
>RESPONSE  PARAMETERS  FOR  DESIGN.  THERE  IS  NO  SUCH  PROVISION  IN
>BOCA  1999. DOES  ANY  BODY  KNOW  WHY??   DOES  THAT  MEAN  I  CAN  REDUCE
> THE  BASE  SHEAR  AS  MUCH  AS  I  WANT ,  IF  MY  PERIOD  IS  VERY  VERY
>LARGE  ???  OR  DO  I  STILL  HAVE  TO  DESIGN  FOR  STATIC  BASE  SHEAR.
>THANKS  VERY  VERY  MUCH  IN  ADVANCE.
>
>           BISARYA(--nospam--at)AOL.COM
>          ARVIND  BISARYA
>
>
>
>
>
>
>
>
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