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08-01-2007, 10:20 PM
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Major props
Major props need to be given to the emergency services here. The police have the area sealed from the public. The streets all around all blocked to allow for emergency vehicles. Emergency rescue boats were in the water even though there is a big lock with the highest waterfall and elevation drop on the entire course of the river about 1/2 mile upstream.
By the time I got a call and went down (I live on the Mississippi 1/2 mile toward the city from the bridge) to see if I could help - approx 30 min from the time of the accident though I didn't know it at the time - all of the above was done. Thank god for the construction on that bridge or you would be looking at hundreds dead!!!!!          
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08-01-2007, 10:25 PM
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 But back to this topic...... Last edited by BuckeyeMike80; 08-01-2007 at 10:34 PM.
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08-01-2007, 10:51 PM
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To get this thread back on topic....
Twins-Royals game postponed due to bridge collapse Quote:
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08-01-2007, 11:03 PM
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Didn't something like this happen in Oklahoma a few years ago?
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08-01-2007, 11:10 PM
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08-01-2007, 11:11 PM
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08-01-2007, 11:14 PM
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 Go ding yourself.The last numbers I heard on the news were that there are 6 confirmed deaths and 20+ injured. Sad story. Now it is 7 reported deaths. Last edited by Buckeyedynasty; 08-02-2007 at 02:50 AM.
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08-02-2007, 07:42 AM
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The 89 page MNDOT report by UM CE department is here in PDF format. In 2005 MNDOT inspection reported the bridge to be structurally deficient. The bridge was effectively slated for future replacement. Basically, the problem can be stated thusly. The bridge was built to accept a lower flow of traffic than it was forced to accept. The acceptance criteria for the bridge load as constructed in 1967 assumed a constant load, rather than a real life periodic cyclic stress load. The load factor equations used in '67 would never be used today in making a new bridge - being very unconservative. Failure mode - I fully expect the failure mode to be one that is illustrated by a flexing stress model. That is, like a paper clip being bent to and fro by hand, the steel connectors and trusses in the bridge were being bent and relaxed through a range of motion - the amplitude of which depends on the mass of the passing traffic. Because of increased load that range of motion and magnitude of stress is greater than the '67 unconservative design assumed. Without sufficient redundancy the trusses and other structural members will eventually fail under the applied load. Like the paper clip illustration, at some point, the metal will begin to form minute cracks which then propagate, till there is catastrophic failure. Because of the lack of redundancy in the structure, once a major section fails the remainder cannot support the structural or passing load and the whole thing comes down like a house of cards. This was simply a case of an accident waiting to happen. Quote:
The original CNN report of this collapse is here.
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08-02-2007, 07:47 AM
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we have 7 employee's that work in St. Paul, and I know several more people in that area. I was able to get in contact with two of them last night who are ok, but I haven't heard about the others yet.
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08-02-2007, 10:58 AM
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fisher of men, oh wait that's christian not MuslinLast edited by CCI; 08-02-2007 at 11:12 AM.
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08-02-2007, 11:29 AM
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08-02-2007, 11:53 AM
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Just a few posts above yours. Webber Falls on the I-40, initiated by a barge collision, also believed to be promoted by structural deficiency (lack of redundancy). The original CNN report of this collapse is here.
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08-02-2007, 12:58 PM
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08-02-2007, 01:35 PM
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08-02-2007, 01:39 PM
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What the [censored] does that mean? "Maybe"
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