Tornado Design Criteria
Tornado Design Criteria
(OP)
I was reading some design criteria for a structure and it stated that the structure for tornado design parameters:
It stated the following parameters:
Maximum Tangential Velocity of 200mph & Translational velocity of 50 mph.
Does anyone know how this relates to the standard wind design for structures such as you would see in IBC/ASCE7?
It also stated a pressure drop of 2 psi in 3 seconds.
I have never came across anything like this before, so I just thought I would see what any of you know about the subject.
Thanks
It stated the following parameters:
Maximum Tangential Velocity of 200mph & Translational velocity of 50 mph.
Does anyone know how this relates to the standard wind design for structures such as you would see in IBC/ASCE7?
It also stated a pressure drop of 2 psi in 3 seconds.
I have never came across anything like this before, so I just thought I would see what any of you know about the subject.
Thanks






RE: Tornado Design Criteria
RE: Tornado Design Criteria
Then the other magnitude would be the rate to which depression can be created by the tornado, generating then suction force.
From the first compounded velocity something can be made for everything, pressures and suctions, looking for the wind pressures effects beyond laminar flow. From the rate of generation of pressure drop, this can be passed to study additional suction loading in some kind of dynamic analysis. But it would be better to find the correlations you ask to avoid some pains.
RE: Tornado Design Criteria
Dik
RE: Tornado Design Criteria
To clarify what you are saying. A tornado with 200 mph wind speed (internal to the tornado) and to tornado itself is moving along the ground at 50mph?
I follow that reasoning.
RE: Tornado Design Criteria
RE: Tornado Design Criteria
BA
RE: Tornado Design Criteria
RE: Tornado Design Criteria
BA
RE: Tornado Design Criteria
http://cedb.asce.org/cgi/WWWdisplay.cgi?251300
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There is something to start with these, hope this helps.
RE: Tornado Design Criteria
RE: Tornado Design Criteria
RE: Tornado Design Criteria
To draw a parallel, it is akin to a storm surge for building destrction that is costly and impractical to design for.
It is a building, design for the appropriate requirement for the structure and recommend interior "safe cells"(reinforced concrete or CMU with a concrete roof and inward swinging doors) that are close of quick human protection. - They are commonly built in homes and used as storage area or closest in many geographic areas.
Dick
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.