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RE: Blast Resistant Design

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A quality response, Sprague. Appreciated !!

Syed Faiz Ahmad; MEngg, MASCE

Senior Structural Engineer

Saudi Oger Ltd

Riyadh, Saudi Arabia

>From: "Sprague, Harold O."
>Reply-To:
>To: "'seaint(--nospam--at)seaint.org'"
>Subject: RE: Blast Resistant Design
>Date: Mon, 30 Sep 2002 09:52:52 -0500
>
>Blast design is an endeavor all into itself. The learning curve is long and
>steep. Blast load resistance is a function of the initiating blast event.
>Vapor cloud blast loading is often considered in petro-chemical types of
>blasts. TNT equivalent blast loading is what is commonly used in
>anti-terrorist and military applications. I have a couple of "handbooks"
>that are each 6 inches thick just on the TNT type of blast loading.
>Bandwidth does not allow digesting 12 inches of material to a posting on
>this list.
>
>Steel structures in particular have not been studied as deeply as they
>should be in regard to blast loading. AISC has a blast committee that is
>just getting started. Blast loads don't lend themselves to easy
>quantification. Flexural response is different than the shear responses.
>There are some very sophisticated programs that can predict over pressure,
>but the response is a different story. There are many computer programs
>that are used to predict overpressure and structural response. Some are
>pretty good, some are pretty bad. Often, the time-history blast over
>pressures are extracted from a hydrocode type of program, and put into a
>nonlinear analysis program. Often, prototypes are constructed, tested first
>with static loads, and then with dynamic testing.
>
>I would suggest that you hire a blast consultant. I have seen some major
>errors by "less seasoned" blast engineering efforts. Consider attending the
>SAVIAC symposium http://www.saviac.org/upcoming_events.htm. If you do want
>to hire a consultant, let me know. I could give you a list of names.
>
>You can start by contacting Dr. Sam Kiger at the Civil Engineering
>Department of the University of Missouri - Columbia.
>
>Regards,
>Harold O. Sprague
>
> > -----Original Message-----
> > From: dileep Kulkarni [SMTP:dileep_kulkarni(--nospam--at)hotmail.com]
> > Sent: Sunday, September 29, 2002 11:10 AM
> > To: seaint(--nospam--at)seaint.org
> > Subject: Blast Resistant Design
> >
> > Hi,
> > I am designing a steel structure mounted on a ship. This may be
> > subjected
> > to, amongst other loads, blast loading. I do have a rough idea how to go
> > about it. However, since I am doing it for the first time, I want make
> > sure
> > I am doing it right. Can any one give me brief design steps and some
> > inportant conepts regarding blast loading, analysis & design.
> >
> > Cheers,
> >
> > Dileep Kulkarni
> >
>
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