Re: [Phys-l] Why soldiers break step on small bridges, and not so small.

[alex brown <aesbrown77@yahoo.co.uk>]

As an aside... There was serious problems with the Millenium Bridge when first built.  When the number of people on it reached a critical number the bridge oscillated quite alarmingly... Details found here

http://www.arup.com/millenniumbridge/



--- On Fri, 29/7/11, Bernard Cleyet <bernardcleyet@redshift.com> wrote:

From: Bernard Cleyet <bernardcleyet@redshift.com>
Subject: Re: [Phys-l] Why soldiers break step on small bridges, and not so small.
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Date: Friday, 29 July, 2011, 6:21

while searching I found this Ceylon:

http://www.physicsforums.com/showthread.php?t=100679


If the above doesn't work for "you", I'll copy and send.

bc 



On 2011, Jul 26, , at 20:53, William Robertson wrote:

> Just providing info. I wasn't trying to say that the Mythbusters did  
> anything conclusive. They used reasonably solid bridges and small  
> robot "soldiers" for their test. I would say, though, that they made a  
> good case that any average bridge in place at that time (not a  
> swinging foot bridge) would be hard pressed to go into normal mode  
> vibration as a result of marching soldiers.
>
> Bill
>
>
> On Jul 26, 2011, at 9:29 PM, Bernard Cleyet wrote:
>
> > Not worth much  (Using the word "flimsy" makes it un-falsefiable.)

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