OT: Engineering question...
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- Old Ironsights
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OT: Engineering question...
Do you build a Brigde ofer a Canal, or a Canal over a River?
A: Both!
Water Bridge in Germany. Six years, 500 million Euros, 918 meters long. This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. It is located in the city of Magdeburg, near Berlin. The photo was taken on the day of inauguration.
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
Question #2:
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?
I'll leave the Answer to a "Eureka" moment...
A: Both!
Water Bridge in Germany. Six years, 500 million Euros, 918 meters long. This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. It is located in the city of Magdeburg, near Berlin. The photo was taken on the day of inauguration.
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
Question #2:
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?
I'll leave the Answer to a "Eureka" moment...
C2N14... because life is not energetic enough.
מנא, מנא, תקל, ופרסין Daniel 5:25-28... Got 7.62?
Not Depressed enough yet? Go read National Geographic, July 1976
Gott und Gewehr mit uns!
מנא, מנא, תקל, ופרסין Daniel 5:25-28... Got 7.62?
Not Depressed enough yet? Go read National Geographic, July 1976
Gott und Gewehr mit uns!
- Buck Elliott
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Re: OT: Engineering question...
Ships & barges displace their weight in water...
Regards
Buck
Life has a way of making the foreseeable that which never happens, and the unforeseeable, that which your life becomes...
Buck
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- Advanced Levergunner
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Re: OT: Engineering question...
I would like to see a picture from underneath.
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- Advanced Levergunner
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Re: OT: Engineering question...
Just the water.
Question, does a truck (enclosed van trailer) full of birds weigh the same when the birds are flying as when they are setting?
Question, does a truck (enclosed van trailer) full of birds weigh the same when the birds are flying as when they are setting?
Re: OT: Engineering question...
The design would have to withstand the additional weight as well (weight of water + ships and barge traffic).
Thanks,
Dave B.
Thanks,
Dave B.
- 44magHunter
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Re: OT: Engineering question...
It would have to be built to withstand the additional weight of barges.
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- Advanced Levergunner
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Re: OT: Engineering question...
That is cool. fantastic pic!
- AJMD429
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Re: OT: Engineering question...
I believe the 'additional weight' of the ship would push it into the water, and displace that weight of water, which since the ends are open and theoretically connected to large/infinite areas would move 'off' the bridge, there would be no additional weight, unless the boat were so deep it touched bottom.
The water would be EASY to support on a bridge in the sense that it would be the ultimate in evenly distributed loads, but potentially DIFFICULT in that it needs contained/can leak, and could develop resonance or simply waves which could place huge strains on the structure that would NOT be evenly distributed. Still, that much water sure as heck would weigh ALOT!
The water would be EASY to support on a bridge in the sense that it would be the ultimate in evenly distributed loads, but potentially DIFFICULT in that it needs contained/can leak, and could develop resonance or simply waves which could place huge strains on the structure that would NOT be evenly distributed. Still, that much water sure as heck would weigh ALOT!
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- Ysabel Kid
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Re: OT: Engineering question...
Just wait until some barge driver rams one of the supports, it'll be one for the ages.
Those people standing on the sides add more stress than the ferries passing thru the water.
Those people standing on the sides add more stress than the ferries passing thru the water.
Re: OT: Engineering question...
Back home in Illinois we called them aquaducts.
There was one in my home town of Ottawa where the Illinois-Michigan canal crossed over the Fox River.
The canal had been unused and drained before my time but the aquaduct stood, and may still.
Jack
There was one in my home town of Ottawa where the Illinois-Michigan canal crossed over the Fox River.
The canal had been unused and drained before my time but the aquaduct stood, and may still.
Jack
Re: OT: Engineering question...
Yeah.....but hows the fishing....
priorities boys!
priorities boys!
LETS GO SHOOT'N BOYS
- Old Ironsights
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Re: OT: Engineering question...
"Eureka Moment" was the clue.Dave B wrote:The design would have to withstand the additional weight as well (weight of water + ships and barge traffic).
Thanks,
Dave B.
As the others have said, anything placed in water displaces the water in direct proportion to their volume & mass.
C2N14... because life is not energetic enough.
מנא, מנא, תקל, ופרסין Daniel 5:25-28... Got 7.62?
Not Depressed enough yet? Go read National Geographic, July 1976
Gott und Gewehr mit uns!
מנא, מנא, תקל, ופרסין Daniel 5:25-28... Got 7.62?
Not Depressed enough yet? Go read National Geographic, July 1976
Gott und Gewehr mit uns!
Re: OT: Engineering question...
That's one of those "elevator" questions. You know the one, if I jump up at the right moment as the elevator crashes to the ground will I be okay. In theory, you could jump fast enough, but the top of the car would be crashing down, so... Splat!Chuck 100 yd wrote:Just the water.
Question, does a truck (enclosed van trailer) full of birds weigh the same when the birds are flying as when they are setting?
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"Go low, go slow and preferably in the dark" The old Sarge (he was maybe 24.
"Freedom is never more that a generation from extinction" Ronald Reagan
"Every man should have at least one good rifle and know how to use it" Dad
Re: OT: Engineering question...
There are several such aqueduct bridges in Europe. It is REALLY neat! Canal boats are neat! Great post!!!
Sincerely,
Hobie
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Hobie
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- Rimfire McNutjob
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Re: OT: Engineering question...
When I first saw the picture in the post I was guessing Dutch / Netherlands but the Germans are nuts too I suppose.
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Re: OT: Engineering question...
That's old technology. This British job, circa 1800, is a real canal aqueduct. It's still in service, for pleasure boaters.
Such a bridge has to be strong enough to handle water at its greatest expected depth. The boats might make a tiny change in that depth, but it is limited by the spillways at the nearest locks.
Such a bridge has to be strong enough to handle water at its greatest expected depth. The boats might make a tiny change in that depth, but it is limited by the spillways at the nearest locks.
Last edited by KWK on Wed Aug 05, 2009 6:45 pm, edited 1 time in total.
- gunslinger598
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- Buck Elliott
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Re: OT: Engineering question...
It would only need to bear the additional weight if there were locks at either end of the span, which enclosed the water passing over the lower canal.
Regards
Buck
Life has a way of making the foreseeable that which never happens, and the unforeseeable, that which your life becomes...
Buck
Life has a way of making the foreseeable that which never happens, and the unforeseeable, that which your life becomes...