Re: [Phys-l] Tacoma Narrows

[chuck britton <cvbritton@mac.com>]

Note that the KC disaster was COMPLETELY avoidable.
An economizing design change should have been caught and never allowed.
The simple Force Diagram analysis of this design change should be 
required for all architects.
The original design would have been quite sufficient to handle the 
dynamic load.

This is unlike the Tacoma Narrows bridge where the fault was 
unpredicted aerodynamic loading. The vortex shedding led to resonance 
that had never before been experienced to this degree, There was no 
use of 'substandard' steel that the yahoo article refers to (at least 
I have never heard of this being a problem).
.
At 7:05 AM -0700 9/9/11, Marc \"Zeke\" Kossover wrote:
> An even more deadly architectural disaster is the collapse of the 
> walkway in a Hyatt in Kansas City. The physics is easy to understand 
> even for high school students and makes an excellent problem when 
> studying tension. 
> http://en.wikipedia.org/wiki/Hyatt_Regency_walkway_collapse 
>
> Marc "Zeke" Kossover
>
> From: Anthony Lapinski <Anthony_Lapinski@pds.org>
> > To: phys-l@carnot.physics.buffalo.edu
> > Sent: Thursday, September 8, 2011 5:31 PM
> > Subject: [Phys-l] Tacoma Narrows
> >
> > is the lead story on Yahoo News right now:
> >
> > http://realestate.yahoo.com/promo/5-shocking-architectural-failures.html
> >
> > Interesting!
> >
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