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Florida university bridge collapses

Started by pyewacket, March 15, 2018, 01:21:54 PM

ItsOver

Quote from: Jojo on March 16, 2018, 12:32:39 AM
Someone had to have known.  Bridges are very carefully designed...
Oh?

Faulty Design Led to Minnesota Bridge Collapse, Inquiry Finds
http://www.nytimes.com/2008/01/15/washington/15bridge.html

How could the most "modern" suspension bridge, with the most advanced design, suffer catastrophic failure in a relatively light wind?
https://www.wsdot.wa.gov/TNBhistory/Machine/machine3.htm

Reviewing the collapse and subsequent investigation in his 2012 book To Forgive Design, engineering historian Henry Petroski finds it "a cautionary tale for engineers of every kind". As a result of the thoroughness of the investigation, the cause of the disaster was precisely and indisputably found to be "a design that inadvertently made inspection all but impossible and failure all but inevitable. If ever a design was to blame for a failure, this was it"
https://en.wikipedia.org/wiki/Silver_Bridge

albrecht

Quote from: ItsOver on March 16, 2018, 09:42:18 AM
Oh?

Faulty Design Led to Minnesota Bridge Collapse, Inquiry Finds
http://www.nytimes.com/2008/01/15/washington/15bridge.html

How could the most "modern" suspension bridge, with the most advanced design, suffer catastrophic failure in a relatively light wind?
https://www.wsdot.wa.gov/TNBhistory/Machine/machine3.htm

Reviewing the collapse and subsequent investigation in his 2012 book To Forgive Design, engineering historian Henry Petroski finds it "a cautionary tale for engineers of every kind". As a result of the thoroughness of the investigation, the cause of the disaster was precisely and indisputably found to be "a design that inadvertently made inspection all but impossible and failure all but inevitable. If ever a design was to blame for a failure, this was it"
https://en.wikipedia.org/wiki/Silver_Bridge
How come I run across bridges and dams build by some rancher, in some cases likely illegally and without government environmental studies, that last even after place abandoned but the fancy ones always seem to be over budget and have "issues." Remember this one? An interesting engineering study actually.
https://en.wikipedia.org/wiki/Millennium_Bridge,_London

"bridge's movements were caused by a 'positive feedback' phenomenon, known as synchronous lateral excitation. The natural sway motion of people walking caused small sideways oscillations in the bridge, which in turn caused people on the bridge to sway in step, increasing the amplitude of the bridge oscillations and continually reinforcing the effect. On the day of opening, the bridge was crossed by 90,000 people, with up to 2,000 on the bridge at any one time. Resonant vibrational modes due to vertical loads (such as trains, traffic, pedestrians) and wind loads are well understood in bridge design. In the case of the Millennium Bridge, because the lateral motion caused the pedestrians loading the bridge to directly participate with the bridge, the vibrational modes had not been anticipated by the designers. The crucial point is that when the bridge lurches to one side, the pedestrians must adjust to keep from falling over, and they all do this at exactly the same time. Hence, the situation is similar to soldiers marching in lockstep, but horizontal instead of vertical.
The risks of lateral vibration problems in lightweight bridges are well known. Any bridge with lateral frequency modes of less than 1.3 Hz, and sufficiently low mass, could witness the same phenomenon with sufficient pedestrian loading. The greater the number of people, the greater the amplitude of the vibrations. For example, Albert Bridge in London has a sign dating from 1873 warning marching ranks of soldiers to break step while crossing"

Gd5150

Quote from: ItsOver on March 16, 2018, 09:42:18 AM

How could the most "modern" suspension bridge, with the most advanced design, suffer catastrophic failure in a relatively light wind?




ItsOver

Quote from: albrecht on March 16, 2018, 10:06:53 AM
How come I run across bridges and dams build by some rancher, in some cases likely illegally and without government environmental studies, that last even after place abandoned but the fancy ones always seem to be over budget and have "issues." ...

One of the many wonders of bureaucracy.  When everyone is responsible, no one is responsible.

ItsOver

The only victim of the Tacoma Narrows Bridge collapse.

"Tubby" the dog fell into fame when Galloping Gertie collapsed on November 7, 1940. As the only victim of that great disaster, Tubby has earned a special place in the hearts of many. His death symbolizes the drama of that terrible day. All that is known about the unfortunate pooch is here. These few facts are a small but meaningful way to honor his unique place in history.

https://www.wsdot.wa.gov/TNBhistory/tubby.htm

"The WSTBA reimbursed Coatsworth for the loss of his car's "contents," which would have included Tubby, a total of $364.40. Coatsworth received a separate check for $450.00 for the value of the car."


Gd5150

Quote from: ItsOver on March 16, 2018, 10:23:56 AM
The only victim of the Tacoma Narrows Bridge collapse.

"Tubby" the dog fell into fame when Galloping Gertie collapsed on November 7, 1940. As the only victim of that great disaster, Tubby has earned a special place in the hearts of many. His death symbolizes the drama of that terrible day. All that is known about the unfortunate pooch is here. These few facts are a small but meaningful way to honor his unique place in history.

https://www.wsdot.wa.gov/TNBhistory/tubby.htm

"The WSTBA reimbursed Coatsworth for the loss of his car's "contents," which would have included Tubby, a total of $364.40. Coatsworth received a separate check for $450.00 for the value of the car."

I’ve given that dog Tubbys death much more thought over the years than if hundreds of people had died. All the ways he could’ve saved his dog. Why didn’t he just grab the damn dog and run. Leave a window open and run. Thinking of a dog going down with the car always bums me out.

ItsOver

Quote from: Gd5150 on March 16, 2018, 11:10:49 AM
I’ve given that dog Tubbys death much more thought over the years than if hundreds of people had died. All the ways he could’ve saved his dog. Why didn’t he just grab the damn dog and run. Leave a window open and run. Thinking of a dog going down with the car always bums me out.
Yeah, too bad it wasn't a cat, instead.  ;)

Gd5150

This fla bridge was designed to withstand a cat5 hurricane and last 100 years. It’s taken 5 years to build. That’s a year longer than it took to build the Golden Gate Bridge, and 5 times as long as it took to build the Empire State Building.

A testament to the Obama (TIGER) program which was responsible for construction of the bridge. Transportation Investment Generating Economic Recovery. How’s an overpriced walking bridge placed next to a perfectly fine crosswalk generate economic recovery?

But government run single payer healthcare will be great!

Gd5150

Quote from: ItsOver on March 16, 2018, 11:16:48 AM
Yeah, too bad it wasn't a cat, instead.  ;)

A cat would’ve survived ;). He’d have driven that damn car off the bridge himself. 😄


ItsOver

Quote from: Gd5150 on March 16, 2018, 11:20:45 AM
A cat would’ve survived ;). He’d have driven that damn car off the bridge himself. 😄


Ha, ha, ha!  I'd forgotten about that SNL routine.  I hope Toonces does better on bridges than he did with cliff-side roads.

http://youtu.be/5fvsItXYgzk

albrecht

Quote from: Gd5150 on March 16, 2018, 11:19:17 AM
This fla bridge was designed to withstand a cat5 hurricane and last 100 years. It’s taken 5 years to build. That’s a year longer than it took to build the Golden Gate Bridge, and 5 times as long as it took to build the Empire State Building.

A testament to the Obama (TIGER) program which was responsible for construction of the bridge. Transportation Investment Generating Economic Recovery. How’s an overpriced walking bridge placed next to a perfectly fine crosswalk generate economic recovery?

But government run single payer healthcare will be great!
These crazies are insidious. Our traffic situation is horrible but they are building bridges over the highway, rivers, and creeks for bikes. That nobody uses. Millions wasted, over budget, and rarely, if ever, used. But "green" and promotes bike riding instead of driving. And at least it hasn't fallen on people yet. City doesn't seem to get that when it is over 100 out people aren't going to bike to work, even if they like to bike. Spending is not going to make people Dutch (they went on fact-finding meetings there.) There is a thing called terrain, distances, and temperature differences.
http://www.kxan.com/news/local/austin/new-barton-creek-bike-and-pedestrian-bridge-at-mopac-opens_20180227104826825/994761675

Hog

Testing reveals thermite residue, molten bridge material was seen and documents being hidden within the bridge are now missing.

Canadian steel wouldn't do that, sounds like there was a deficit of rebar within the concrete.

peace
Hog.


whoozit

Quote from: Jojo on March 16, 2018, 12:32:39 AM
Someone had to have known.  Bridges are very carefully designed.  I don't feel sorry for them.
Oh Jojo.  Please do me the honor of marrying me so I can have the pleasure of divorcing you.

pyewacket

This is beyond the pale, if they actually made choices based on political correctness. Can anyone find other information to confirm this?

A Female-Led Construction Company Built The Florida Bridge That Collapsed

https://squawker.org/culture-wars/a-female-led-construction-company-built-the-florida-bridge-that-collapsed/



https://www.liveleak.com/view?t=CY6AI_1521201909

Source for the picture- you can enlarge it there.

ItsOver

Quote from: pyewacket on March 17, 2018, 08:09:36 AM
This is beyond the pale, if they actually made choices based on political correctness. Can anyone find other information to confirm this?

A Female-Led Construction Company Built The Florida Bridge That Collapsed

https://squawker.org/culture-wars/a-female-led-construction-company-built-the-florida-bridge-that-collapsed/



https://www.liveleak.com/view?t=CY6AI_1521201909

Source for the picture- you can enlarge it there.
It wouldn't surprise me, Pye.  The Feds and most state and local governments have minority-owned contracting requirements.

For example, from https://www.inc.com/guides/2010/05/minority-owned-business-certification.html

Many states and cities also have minority-owned business programs, which are often referred to as Minority Business Enterprise (MBE) programs. Maryland, for instance, has a legally mandated program that requires 25 percent of all government contracts to be filled by minority-owned businesses.

It's all part of the socialist agenda, to replace competency with Bravo Sierra.

Dr. MD MD

Quote from: pyewacket on March 17, 2018, 08:09:36 AM
This is beyond the pale, if they actually made choices based on political correctness. Can anyone find other information to confirm this?

A Female-Led Construction Company Built The Florida Bridge That Collapsed

https://squawker.org/culture-wars/a-female-led-construction-company-built-the-florida-bridge-that-collapsed/



https://www.liveleak.com/view?t=CY6AI_1521201909

Source for the picture- you can enlarge it there.

Way to go ladies!  :D

Now get back in that kitchen and bake me some fucking cookies! >:(

Uncle Duke

Quote from: ItsOver on March 17, 2018, 08:21:06 AM
It wouldn't surprise me, Pye.  The Feds and most state and local governments have minority-owned contracting requirements.

For example, from https://www.inc.com/guides/2010/05/minority-owned-business-certification.html

Many states and cities also have minority-owned business programs, which are often referred to as Minority Business Enterprise (MBE) programs. Maryland, for instance, has a legally mandated program that requires 25 percent of all government contracts to be filled by minority-owned businesses.

It's all part of the socialist agenda, to replace competency with Bravo Sierra.

That's why many of my former colleagues set up incorporated small business consulting firms with their wife/daughter named as CEO.  The trick was to keep the CEO from meeting with the customer.

In fairness, however, the good number of female engineers I worked with over 35 years were no different than any other pigeon hole group you care to name; some were good, some were bad.  I will say the more successful female engineers tended to be less feminine, and were very aggressive. Probably a result of having to compete in a male dominated career field, over compensating to be taken seriously.

pyewacket

This guy can be kind of an ass, but he does put forth a plausible explanation.

https://www.youtube.com/watch?v=KtiTm2dKLgU

ItsOver

Quote from: Uncle Duke on March 17, 2018, 08:57:28 AM
That's why many of my former colleagues set up incorporated small business consulting firms with their wife/daughter named as CEO.  The trick was to keep the CEO from meeting with the customer.

In fairness, however, the good number of female engineers I worked with over 35 years were no different than any other pigeon hole group you care to name; some were good, some were bad.  I will say the more successful female engineers tended to be less feminine, and were very aggressive. Probably a result of having to compete in a male dominated career field, over compensating to be taken seriously.
Yeah, I saw it, too.  One of the many games you can play in the government contracting game.  To me, having these "pigeon hole" requirements are an insult to women, minorities, etc.  The best are the best, regardless of whether they're purple, green, like to pick daisies on Sunday, etc.  I could have given a damn less, as long as they were good at the job they were expected to do.  I know I sure as hell wouldn't pick a surgeon unless they we're damn good with the knife and/ or the robot they used.  If they wanted to paint their face pink and stand on their head on their time off, go for it.

Up All Night

As tragic as the failure and collapse of this pedestrian bridge is, it is an allegory for the Democratic Party.

ItsOver

Quote from: Up All Night on March 18, 2018, 10:11:50 AM
As tragic as the failure and collapse of this pedestrian bridge is, it is an allegory for the Democratic Party.
Too bad the Dems can't be cleaned-up and swept away after their many failures.

SredniVashtar

Quote from: Up All Night on March 18, 2018, 10:11:50 AM
As tragic as the failure and collapse of this pedestrian bridge is, it is an allegory for the Democratic Party.

You wouldn't know an allegory if it was served to you on a skewer, you clueless wanker.

Quote from: pyewacket on March 17, 2018, 09:57:02 AM
This guy can be kind of an ass, but he does put forth a plausible explanation.

https://www.youtube.com/watch?v=KtiTm2dKLgU

Thanks for posting.  Very interesting and yes - he does seem to be an ass  ;D


If the guy is correct, I can see how the original problem occurred.  What's mind boggling is the dicking around with remediation at high noon and the road underneath open.

Quote from: SredniVashtar on March 18, 2018, 10:37:38 AM
You wouldn't know an allegory if it was served to you on a skewer, you clueless wanker.

Great to see you, Shreddie!  :D I wonder when Yorkshire Pudding is going to grace us with his presence?  That wife of his must be using the whip.

SredniVashtar

Quote from: 21st Century Man on March 18, 2018, 03:44:50 PM
Great to see you, Shreddie!  :D I wonder when Yorkshire Pudding is going to grace us with his presence?  That wife of his must be using the whip.

Honestly, you lot. You piss and moan when he posts, and now when he's not around you get all misty-eyed. He's the grit in the oyster.

Dr. MD MD

Quote from: SredniVashtar on March 18, 2018, 04:18:04 PM
Honestly, you lot. You piss and moan when he posts, and now when he's not around you get all misty-eyed. He's the grit in the oyster.

No, it's just 21st. He's a "conservative" who gets blue when he doesn't have communists to yuck it up with. ;)

SredniVashtar

Quote from: Dr. MD MD on March 18, 2018, 04:19:46 PM
No, it's just 21st. He's a "conservative" who gets blue when he doesn't have communists to yuck it up with. ;)

I know you don't require anybody else to have a good time. Just a few AJ vids, a box of Kleenex and you're in hog heaven.

Dr. MD MD

Quote from: SredniVashtar on March 18, 2018, 04:25:47 PM
I know you don't require anybody else to have a good time. Just a few AJ vids, a box of Kleenex and you're in hog heaven.

When we invade your island of pedophiles my friends and I will use that box of Kleenex to wipe the tears of joy from our faces. ;)

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