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December 1999, Week 3

HP3000-L@RAVEN.UTC.EDU
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Subject:
Re: Bridges Collapsing
From:
Noel Demos <[log in to unmask]>
Reply To:
Noel Demos <[log in to unmask]>
Date:
Sat, 18 Dec 1999 13:08:20 -0500
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Steve Dirickson wrote:
>
> > > 2) There ARE documented cases of bridges failing when
> > harmonic vibration
> > > gets out of hand.
> >
> > If you're thinking of the Verazono (sp?) Narrows Bridge,
> > there's apparently more to it than simply harmonics.
> > There was a good writeup in Technology & Invention (?) about
> > 2 issues ago.
>
> Verrazano Narrows? It was certainly the longest suspension bridge in the
> world for a number of years, but I don't think it ever fell down. OTOH, our
> own "Galloping Gertie", a.k.a. the Tacoma Narrows Bridge, did its thing on
> 20 Nov 1940.
>
You are correct, Steve.

Nick D.

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