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Re: Extreme Value Analysis - - (was Definition of "Service" Loads)

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I realize that if you have two such unusual simultaneous events to deal with, 
 without knowing anything about them individually.

But in most cases you can find the work done for one or the other. Combining 
 them is a lot easier so long as you know what you're doing.

Also, there are data available from NOAA, USACE, state govts, etc to allow 
you to do analyses of highly localized events.

Think about the locations indicated in ASCE 7 for local wind effects, fur 
example. With a sufficient body of data you can determine the 50, 100, 300, 
 700 year etc. return period analyses yourself.

The data coupled with the powerful software tools now available would allow 
 a design engineer to do what once would have required an academic specialist. 

William L. Polhemus, Jr. P.E.


> On Jun 12, 2014, at 7:32 PM, Daryl Richardson <h.d.richardson(--nospam--at)> 
> wrote: 
> Bill,,
> This is an excellent suggestion!!
> I have thought of this before but never put it in perspective as clearly 
> as you just have done. 
> A couple of possible combinations that come to mind include:
> 1.) Earthquake followed by tsunami such as happened in Japan in 2011.
> 2.) Fire followed by wind regarding free-standing firewalls.
> This would seem to be a suitable topic for your ASCE 7.  It would also 
> make a good refference book subject if such refferences don't already 
> exist. Good thinking, Bill
> Daryl
> _______________________________________________________________

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