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David
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Posted: Aug. 04 2007,2:29 pm |
Post # 1 |
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What if the construction work had two sets of workers working with jackhammers and the jackhammers created a harmonic effect? Coupled by the traffic created by the cars, trucks and bus.
The Millennium Bridge, London
The first pedestrian crossing of London’s Thames river in over one hundred years, the Millennium Bridge was conceived as part of the high-profile Millennium Project. Opened on the 10th of June 2000, it was closed again just three days later when it became apparent that the large numbers of people crossing it were causing the whole structure to sway nauseatingly…
The initially small natural vibrations of the bridge encouraged the pedestrians to walk in sync with the movement - which only served to amplify the effect. These vibrations began to occur when there were comparatively few people on the bridge, so by the time there were around 2,000 people on it at once, the wobbling had become pretty dramatic [Youtube link].
Lateral movement of this type in bridges was well known (most famously having caused the complete collapse [Youtube link] of the Tacoma Narrows bridge) - yet this driven harmonic motion caused by the movement of pedestrians remained unanticipated throughout the pre-construction analysis of the bridge.
The Millennium Bridge was closed from June 2000 until February 2002, and even though the problem has now been resolved, it will forever be known simply as The Wobbly Bridge.
You can't go forward looking back!  |
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GoFastRacer
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Posted: Aug. 06 2007,9:55 pm |
Post # 4 |
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They were saying today, they should have it ready to go by this time next year!.. I think the first place they need to inspect is the one that sits right next to the one that took a $shit!.. 
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GoFastRacer
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Posted: Aug. 08 2007,6:02 am |
Post # 6 |
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| Quote (David @ Aug. 07 2007,11:40 am) | | Â But I am not sure if they understand sense. |
That would asking quite a bit!.. 
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GoFastRacer
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Posted: Aug. 08 2007,8:50 pm |
Post # 8 |
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| Quote (Carrera Elite @ Aug. 08 2007,2:11 pm) | | Quote (David @ Aug. 07 2007,11:40 am) | | But I am not sure if they understand sense. |
They Don't......... It's the Goverment!!  Â Â  |
Ain't that the truth!..
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GoFastRacer
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Posted: Sep. 22 2008,6:08 am |
Post # 12 |
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| Quote (WATERDOG @ Sep. 21 2008,1:59 pm) | | Quote (Ziggy @ Sep. 21 2008,10:58 am) | | Amazes me they could replace it within a year when  you look at projects like the bridge by Hoover Dam taking several years. |
They don't have Cal-Trans. |
  
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GoFastRacer
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Posted: Sep. 23 2008,5:54 am |
Post # 14 |
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| Quote (DirtySquirty @ Sep. 22 2008,2:38 pm) | | Quote (GoFastRacer @ Sep. 22 2008,6:08 am) | | Quote (WATERDOG @ Sep. 21 2008,1:59 pm) | | Quote (Ziggy @ Sep. 21 2008,10:58 am) | | Amazes me they could replace it within a year when  you look at projects like the bridge by Hoover Dam taking several years. |
They don't have Cal-Trans. |
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Sadly, that may be the reason. Two guys workin and ten guys watchin. |
That's in they're contract ain't it!..
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WATERDOG
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Posted: Sep. 23 2008,7:58 am |
Post # 16 |
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| Quote (DirtySquirty @ Sep. 23 2008,7:11 am) | | Quote (GoFastRacer @ Sep. 23 2008,5:54 am) | | Quote (DirtySquirty @ Sep. 22 2008,2:38 pm) | | Quote (GoFastRacer @ Sep. 22 2008,6:08 am) | | Quote (WATERDOG @ Sep. 21 2008,1:59 pm) | | Quote (Ziggy @ Sep. 21 2008,10:58 am) | | Amazes me they could replace it within a year when  you look at projects like the bridge by Hoover Dam taking several years. |
They don't have Cal-Trans. |
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Sadly, that may be the reason. Two guys workin and ten guys watchin. |
That's in they're contract ain't it!.. Â |
It must be. That's really all you see with those guys. |
You'd think their arms would get tired holding a coffee cup for that many hours.
"Damn you sure know how to fock things up."-GFR
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11-24-2024 Three Word Post.....The Next Generation.... (Rep.#19,435) from: BigDog
