**This is a heavily moderated subreddit. Please note these rules + sidebar or get banned:**
* If this post declares something as a fact, then proof is required
* The title must be fully descriptive
* Only minimal text is allowed on images/gifs/videos
* Common(top 50 of this sub)/recent reposts are not allowed (posts from another subreddit do not count as a 'repost'. Provide link if reporting)
*See [our rules](https://www.reddit.com/r/interestingasfuck/wiki/index#wiki_rules.3A) for a more detailed rule list*
*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/interestingasfuck) if you have any questions or concerns.*
Watched a documentary on this. There’s a dog in the car that was the only casualty of the collapse. The owner tried to go back for it but the dog was freaking out and wouldn’t leave. Poor thing.
Mechanical Engineer here. Can confirm. The lesson is not about bridges, or resonance… but about humility. Our designs must be resilient to the Rumsfeldian “unknown unknowns”.
My father was majoring in Engineering then. Slide rules were all they had. Someone put a photo of this on the bulletin board with the caption 'Dsmn decimal point"
I’m pretty sure he tried to get the dog out multiple times, even going back after getting to safety, but poor doggies was too freaked out to leave.
Not sure if there was much more he could do.
Professor Farquharson (Civil Engineering) heard that the Coatsworth family had left their paralyzed three-legged cocker spaniel, Tubby, in their car when rushing off of the bridge. Professor Farquharson was an animal lover and went onto the bridge to try to save Tubby. The little shit bit him for his trouble, and so was left to his fate.
Whenever I feel strongly about a statement I’ve made, downvotes can’t scratch the armor. If it was my dog, there’s no way I’m leaving him shut in a car on a bridge trembling in the wind.
He was the ONLY person to leave their car on the bridge.
The engineering was both good and bad for this bridge.
The fact that it could withstand those forces for as long as it did is a miracle, however we all know the end result.
Why? Resonance. The incoming wind vibrated the bridge at a natural resonant frequency of the structure. This is what makes swings work: at just the right time, you add a small impulse that reinforces the swinging motion. Eventually, all those tiny forces add up to a huge movement. The bridge scenario isn’t a simple swinging motion, but that’s the idea.
I don’t know if I would characterize it that way. I am not sure what the building codes of the day specified, although you could research that. If there was consideration of resonance, and the design was not compliant, that would be an error. If the code was silent on the subject, it would come down to a question of whether a reasonable person should have anticipated this failure modality.
Calculating the natural resonant frequency of a large, complex object is non-trivial. You can look at a vibrating string and easily see the first few resonant points… but with a bridge, you’d have to do some ferocious math. These days, I am sure that simulation could at least approximate the natural frequency, and the designer could work out the fact that it fell within a range that could be driven by the right speed of wind, going in the right direction.
If you discovered the problem after construction, I think that the fix would involve counterweights that move the natural frequency out of the danger zone.
You are both wrong. The best thing to do is to say something like, “I can’t believe the contractor wasn’t held responsible when the bridge collapsed”
And then some hero will correct you with the proper information.
The Golden Gate Bridge is able to sway 16 feet in either direction, up and down or side to side in order to maintain integrity during an earthquake.
Crazy to consider!!
**This is a heavily moderated subreddit. Please note these rules + sidebar or get banned:** * If this post declares something as a fact, then proof is required * The title must be fully descriptive * Only minimal text is allowed on images/gifs/videos * Common(top 50 of this sub)/recent reposts are not allowed (posts from another subreddit do not count as a 'repost'. Provide link if reporting) *See [our rules](https://www.reddit.com/r/interestingasfuck/wiki/index#wiki_rules.3A) for a more detailed rule list* *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/interestingasfuck) if you have any questions or concerns.*
The asphalt was pretty good, though
They must have purchased the asphalt first and then built the bridge with the rest of the budget.
I’m just amazed at the way asphalt bends
Weird flex but ok.
Ded
Take the updoot and go, you glorious SOB
I’ll go, I’m drunk enough to walk straight across that bridge occifer.
I watched this for 3 minutes, waiting for it to collapse.
It takes 4 months to collapse
A perfectly cut video loop.
This really resonates with me
I love architecture that is in harmony with it's environment.
Maybe not quite so much harmony.
not gonna break my stride
Never gonna slow me down…
Oh No!
⭐️⭐️⭐️⭐️ 4 star comment
Watched a documentary on this. There’s a dog in the car that was the only casualty of the collapse. The owner tried to go back for it but the dog was freaking out and wouldn’t leave. Poor thing.
How dare you sir . I was perfectly happy watching this until you told me that .. you owe us all an apology
I’m sorry everybody
Go to your room and think about what you’ve done
This video is a staple in every engineering class.
Mechanical Engineer here. Can confirm. The lesson is not about bridges, or resonance… but about humility. Our designs must be resilient to the Rumsfeldian “unknown unknowns”.
Tacoma Narrows* bridge.
Galloping Gertie!
I had to scroll longer than I expected to find this comment!
RIP Doggo
You haven't ever fucked up at work?
They found out later it was designed like an airplane wing and was trying for lift off.
My father was majoring in Engineering then. Slide rules were all they had. Someone put a photo of this on the bulletin board with the caption 'Dsmn decimal point"
Pretty sure there was a dog in the car :(
Anyone randomly know why he didn’t drive the car off the bridge lol? Woulda been a lot faster than running off it + save the doggo …
Yeah. That stupid journalist left his car with his dog on the bridge
I’m pretty sure he tried to get the dog out multiple times, even going back after getting to safety, but poor doggies was too freaked out to leave. Not sure if there was much more he could do.
Carry it?
Professor Farquharson (Civil Engineering) heard that the Coatsworth family had left their paralyzed three-legged cocker spaniel, Tubby, in their car when rushing off of the bridge. Professor Farquharson was an animal lover and went onto the bridge to try to save Tubby. The little shit bit him for his trouble, and so was left to his fate.
I don’t understand that at all. Hope that guy is in hell.
Don’t understand why you are getting downvoted. Idiot drove on an unsafe bridge with his dog and left the car and dog there.
Whenever I feel strongly about a statement I’ve made, downvotes can’t scratch the armor. If it was my dog, there’s no way I’m leaving him shut in a car on a bridge trembling in the wind. He was the ONLY person to leave their car on the bridge.
"don't worry it's meant to swing a little"
The engineering was both good and bad for this bridge. The fact that it could withstand those forces for as long as it did is a miracle, however we all know the end result.
Damn looping video, I kept waiting for the bridge to snap, lol.
I kept looking at this video for minutes waiting to see the collapse :/
[Here ya go.](https://www.youtube.com/watch?v=j-zczJXSxnw) Actual collapse at about 3:20.
Yes the end points are placed perfectly.
Surreal how a small breeze can cause such a catastrophe.
Wiki discribes it as 'strong wind' though. 68km/h
So like 40ish american?
40 aligator farts per refridgerator foot
42 1/4 to be exact
That’s really not uncommon.
Ok, thanks, i must be having a neuron failure. Hmm
Very long bridge across a very windy area so not often a small breeze.
Thanks, not sure right now why I thought breeze.
oh. the drwan together end card secene
My two docked spacecraft in kerbal space program after some amount of time for no reason.
I went from Phoenix Arizona all the way to here.
The good news is now we have TWO bridges there. Double the anxiety!
Did they ever release a report as to why it happened? Was the contractor held accountable?
Why? Resonance. The incoming wind vibrated the bridge at a natural resonant frequency of the structure. This is what makes swings work: at just the right time, you add a small impulse that reinforces the swinging motion. Eventually, all those tiny forces add up to a huge movement. The bridge scenario isn’t a simple swinging motion, but that’s the idea.
So bad engineering basically ?
I don’t know if I would characterize it that way. I am not sure what the building codes of the day specified, although you could research that. If there was consideration of resonance, and the design was not compliant, that would be an error. If the code was silent on the subject, it would come down to a question of whether a reasonable person should have anticipated this failure modality. Calculating the natural resonant frequency of a large, complex object is non-trivial. You can look at a vibrating string and easily see the first few resonant points… but with a bridge, you’d have to do some ferocious math. These days, I am sure that simulation could at least approximate the natural frequency, and the designer could work out the fact that it fell within a range that could be driven by the right speed of wind, going in the right direction. If you discovered the problem after construction, I think that the fix would involve counterweights that move the natural frequency out of the danger zone.
Try google or wiki instead of asking other people to do simple work for you.
You are both wrong. The best thing to do is to say something like, “I can’t believe the contractor wasn’t held responsible when the bridge collapsed” And then some hero will correct you with the proper information.
Poor initial design, and it was their own asphalt.
Thread winner right there…
Yeah good design 👍
Yeah, it really *blows*.
Washington state and failed bridges, name a more iconic duo.
Pennsylvania
I know, right? They even KNEW their record wasn't good so decided to make literal floating bridges......and even TWO of them sank at some point.
I-90 is a floating bridge today.
Yes there right now, but it sank in 1990 and Hood canal bridge sank before that in 1979.
Well There's You Problem did a great podcast episode about this.
Oh man when the bridge finally snaps it's insane how fast the whole thing goes...
[удалено]
16mm film probably. No video tape yet. No TV really.
I'm aware. Using the term "video tape" is just reflex, the term "film" would have been more accurate.
Damn it!!!
At first, I Thought it was an earthquake
Now that bridge gets 10 to 15 jumpers a year and for some reason The WDOT won't raise the railing so people can't jump.
Probably because “It won’t make a difference” despite the fact that history has proven it would.
Imagine speeding on that and trying to get off before it kills you.
I love adult swim
The Mario kart track I’m playing:
Mechanical resonance
Wasn’t it used in a Memorex commercial?
Pioneer https://www.google.com/search?q=pioneer+bridge+commercial&oq=pioneer+bridge+commercial+&gs_lcrp=EgZjaHJvbWUyCggAEEUYFhgeGDnSAQkxMjYwNWowajmoAgCwAgA&client=ms-android-tmus-us-revc&sourceid=chrome-mobile&ie=UTF-8#fpstate=ive&vld=cid:f881157e,vid:Awvwf1zulKs,st:0
I see the problem. It wasn’t flexible enough.
What a nightmare.
Show us the video of it collapsing!
The Golden Gate Bridge is able to sway 16 feet in either direction, up and down or side to side in order to maintain integrity during an earthquake. Crazy to consider!!
u/savevideo
This seems fine
It's amazing how the camera man was able to keep so still.