Tornado Missile Impact
Tornado Missile Impact
(OP)
The structural team I work for is currently assessing a structure for tornado loading. Since most civil code have little or no information on tornadoes other than hazard maps we are using the US NRC Reg Guide 1.76 Design-Basis Tornado and Tornado Missiles for Nuclear Power Plants. Regarding the tornado missile there are three classes of missiles - Schedule 40 Pipe, Automobile and Solid Steel Sphere. The relevant automobile is 5m/2m/1.3m, weighting 1.8 tons and flying with 41 m/s. I want some recommendations or methodology how to transfer this information to a simple and robust design data - a transient load-time function or a pseudo-static force.






RE: Tornado Missile Impact
RE: Tornado Missile Impact
Also for buildings you could consider ICC 500 (go to the ICC website for the link).
http://www.fema.gov/media-library/assets/documents...
Also - for a typical building I'm not sure using nuclear criteria is warranted.
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RE: Tornado Missile Impact
On the other hand, if you are actually designing a shelter, then the place to look might be FEMA: http://www.fema.gov/pdf/plan/prevent/rms/453/fema4...
US Amry Corps of Engineers would be another place to look
TTFN

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RE: Tornado Missile Impact
Faith is taking the first step even when you can't see the whole staircase. -MLK
RE: Tornado Missile Impact
I believe most of the FEMA wood 2x4 data on different wall assemblies was derived from actual asembly testing rather than pure theory. I don't know how much testing has been done on other types of projectiles.
RE: Tornado Missile Impact
TTFN

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RE: Tornado Missile Impact
RE: Tornado Missile Impact
It is a companion to the over-all structural concept regarding a different scale of conceptual loads/failures.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.