Engineering professor says the Baltimore Bridge collapse left him in 'shock'
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- Опубликовано: 25 мар 2024
- The first thought that popped in Dr. Andrew Sen's mind when he saw this video of the bridge collapse in Baltimore was “shock.”
The devastating incident left the Marquette University Assistant Professor nearly speechless.
"To see such a large piece of infrastructure collapse in less than ten seconds…I mean that was scary in a sense,” Dr. Sen explained.
The collapsed Key Bridge is called a truss. Which is something Dr. Sen teaches his Marquette engineering students about.
"We design structures for extreme loads. So, we expect the unexpected in some sense.,” he explained.
However, the bridge could not handle the impact from the over 900-foot cargo ship.
"There are very few bridges in the world where they can withstand a direct hit from an ocean ferrying cargo ship. That's just an incredible amount of load,” Dr. Sen explained.
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I'm 55 been master boilermaker for 30 years I've been across America your bridges are a mess rusting pieces of scrap iron
That professor looks more like a student😅
No bridge is engineered to take a direct hit from a fully-loaded, nearly 1000' container ship moving at 10 mph. Why would you then assume that every large ship passing under the bridge would "be ok" under its own power 100% of the time for decades and decades? What were the reasons for NOT requiring tug escorts for ships over a certain size? Whatever they were, it seems that the argument for not requiring tugs was wrong.
@@jamesmorton4976NOT TOO BRIGHT, ARE YOU?
@jamesmorton4976What?!?! 😂😂😂
A major bridge with nothing protecting the piers despite the risk of collision from marine traffic? In regions where ice flows may impact a bridge during spring breakup piers are protected with rip rap. Essentially a tiny island is formed by dumping rock and soil. This is the cheapest material and the easiest to place. The cost of this protection relative to the cost of the bridge is not considerable. If a pier is surrounded by a coffer dam soil can be dredged from the river bed and pumped into place forming an island.
This is what happens when empires reach too far. They rot internally. Rome was no different. Our leaders have other grandiose priorities in places like Israel, Ukraine and Taiwan. Things like infrastructure, healthy food and viable elections are not on the agenda.
Yes exactly. The problem is the U.S. government would rather spend money on wars and bailing out Wall Street than upgrading our infrastructure. U.S. gets a D- every year from civil engineers. It's the priorities that are the problem and it's getting worse.
it did have dolphins and other large concrete protective pillars but another engineering expert said that when built in the early '70s, they were not now adequate for the size and tonnage of today's cargo ships
Corruption, lack of vision, we learned very little from the attacks on this country. Adding large stones around the piers of this bridge makes too much common sense, the problem comes when everyone with equipment fights for the contract by sueing the hell out of the city and can hold up progress for years. Time to cut beauracry.
absolutely right
I am not an civil engineer but why the bridge that handles container ship has such a low and flimsy piles?
because no one expected a crash of a gigantic ship like that
Fresh civil engineering grad here.
Essentially the problem lies with harbor operations, not the bridge itself. The bridge is a typical truss bridge supported by two columns, nothing out of the ordinary. The real issue is that we have the massive ships traversing through critical infrastructure such as the bridge with no guidance or failsafe.
There’s a consensus that there isn’t any bridge on earth that can withstand a 133,000 ton ship traveling at 8 knots. That force would wipe any pillar out. A continuous truss bridge is typically supported by 2 or so columns that run along either side of the bridge’s span with a steel truss on top to stabilize. Long story short, trusses are meant to stabilize, but when they lose a key column like what happened here, the truss is free to rotate and it will collapse in seconds. Every truss bridge will act in this manner. That’s why in the video, once the the column was wiped out, the bridge and it’s truss rotated before collapsing into the water
@@munks4548Good luck trying to talk sense into the confidently uninformed. At 130,000 tons, that ship may have outweighed the bridge. 8 knots (9.2 mph) doesn't sound like a lot of speed, but if that ship went head on to a beach at that speed, it would have made it quite a way above sea level before it stopped. I'm surprised the bridge fell downward instead of away from the impact.
@@munks4548In Philadelphia there is a similar construction and age bridge, the Betsy Ross bridge. And on thing it has that this one did not is a big coffer island and huge concrete dolphins to protect the water supports from ship impact. They added them during its improvements about 10 years ago even though the ships that travel this section of the river are not as big as the ones in Baltimore harbor.
@@rafaelrivera9346 To my knowledge there were dolphins around the support that was wiped out. These dolphins however are meant to deal with small boats. Calculations have indicated that a ship of that size and that speed would beach itself on a normal shoreline, so it made quick work of the small dolphin islands around the support. Unfortunately there was little preventing this disaster other than better harbor operations and/or tugboats to ensure the cargo ship makes it through unobstructed
There's no excuse for ignorance should not have happened in the first place
The structural engineers that have been interviewed on this subject almost always have a narrow focus on the structure of the bridge itself, and they all say, correctly, that a bridge structure cannot withstand such a load as being struck by a large ship. Then they completely ignore the problem of how the bridge can be protected so that it doesn't get struck by a ship at all. This bridge had no protective structures around the nain pylons at all. I would have liked Prof. Sen to say something about that.
You dont need a professor to know that any bridge would collapse if the support is hit by a huge ship like this. No one build bridges to withstand hits by container ships.
Like to know what Bridges Dr Sen says where they could withstand this cargo ship or greater?
Stop being jealous 😒
Nobody is discussing the fact that steel reinforced concrete exposed to seawater is subject to a shorter life span because the rebar within the concrete structure corrodes and swells up, cracking the concrete and creating a potential collapse.
A seaside condominium in Florida collapsed recently because of that same reason.
It is a domino structure bridge. One section down, the whole bridge collapse. Each part is holding each other, one missing it will drag the entire bridge down.
Not any bridge would collapse. They could have made it so that only part of the bridge were damaged. A total collapse of the entire bridge it not something many people would expect. It was badly designed.
I don’t get why everyone is so “confused”? Dude a big heavy large boat hit a dam bridge.
Because they would expect it to take out a section or two, not to collapse the entire bridge.
my concern how do captain see where he is gonna with all those containers in the way is blocking the view ?? where is the bridge on the boat ?? where was the tug boats ???
I also wondered why no tug boats?
Look at the ship. You can clearly see the bridge above the containers. Look for the white structure past the middle.
The physics is quite easy to understand; very large (size of Nimitz aircraft carrier) cargo ship (very heavy) hitting the bridge is much like a train at 30 mph hitting a car. The forward momentum of all that weight transfers that energy into the bridge support. That bridge support didn't have a chance. That was a very strong bridge, it still didn't stand a chance getting hit with that much weight. Having bridge dolphins would of helped protect the bridge, they would of helped absorb the impact. Bridge dolphins are a group of pilings driven deep around the bridge supports.
Finally a media outlet which does not blame the ship
It was the ships fault, the bridge didn't fall on it's own. Don't worry. Good ole Joe Biden will suck our tax money away to pay for rebuilding the Baltimore Bridge.
This ship was 985 feet long with 3 times the cargo of a 901 foot ship that hit our California Bay bridge in 2007 where the bumper that protects the footing tore into the ship's Hull and it started to leak fuel. that was a tiny fog induced glancing blow, The port near the Key bridge was recently updated to accept much larger ships. One report said it was going 7 MPH directly into the bridges footing or pier, I'm not sure what would happen if that kind of crash happen out here, and they also say our bridges are over engineered due to earthquakes, the fact it happen at 1:30am with MOSTLY bridge maintenance crew being the loss of life was a lucky break for the 34k people who use the bridge a day. Our bay bridge sees about 300k vehicles a day.
How does inspection help if the infrastructure overlooks or can’t handle rare incidents and missing safety features?
What were the American pilots of the ship doing at the time of the collision? It seems they are ill-trained to navigate the ship. BTW the bridge was also very fragile. The pillar structures were not correctly designed to withstand heavy collision from water sides. Was it a Chinese construction company that constructed the bridge?
It doesn’t take a Professor to understand what happened… ridiculous! I’m only an engineer and I could see that was going to happen.
I'm in engineering too and there's more mass in the container ship than that whole bridge and that collapse made perfect sense to me.
@@therealthreadkilla Exactly! Simple physics… 🤪
The engineering professor looks more like a high school kid. Of course he is surprised. He has never seen a cargo ship
@@saltyjo7514 I know! I had to do a double take?🤣 What scares me is that I’ve only got a Masters and I’m 53… Professor? Give me a break!🤣🤪
Worlds youngest professor aged 16. , well done.
Why is he 12?
hahah -- that's exactly what I thought!!!
Young person that made it into their career field in the last decade. Boomers need to GTFO so the newer generation can take care of our infrastructure issues.
Have you ever watched Doogie Howser ?
haaaa
diversity rules
In other news, an engineering professor was fired for not knowing simple math.
The law of inertia was not violated here. This news article literally has nothing to do with the event in Baltimore.
@@robertslugg8361wtf are you talking about? The entire interview had to do with one subject: the bridge collapse in Baltimore. From the start of the video right up until the very end it was 100% Baltimore bridge collapse.
They showed pictures of the collapsed bridge, mentioned the bridge was in Baltimore… They never once talked about anything else other than the bridge in Baltimore. Literally every second of this video had to do with the bridge collapse in Baltimore and nothing else. How can you say it had nothing to do with the bridge in Baltimore? How could you have gotten anything else out of the video other than Baltimore bridge collapse?
@@rnr4204Not the 4 minutes they talked about irrelevant bridge maintenance?
@robertslugg8361 Yup. It was propaganda to fleece more money out of tax payers.
We should all get these RUclips engineers to build the world's strongest bridge. Apparently, the people commenting have the solution...
Like to know what Bridges Dr Sen says where they could withstand this load?
A ship like this should never loose power when leaving the port. Period. There should be extra generators running to prevent exactly this.
Finally a news outlet that blames the bridge
He's surprised it went down so quickly?!! 95,000 TONS that just kept moving!!! That's how!
I always thought whoever designed those low bridges on roads should be unlicensed. And DOT should close them immediately
Those low bridges were usually designed before trucks got to be so tall. That's why older cities like Chicago are FULL of low bridges. To raise those bridges up would mean raising an entire network of infrastructure, mostly rail lines. Stop blaming the bridge, blame the dumb driver that hits the bridge.
Note: I am guilty of hitting a low bridge due to not paying attention. It was MY fault and nobody elses.
also cargo is also over capacity...there are many many faults in the photos....i never seen cargo do 2 cargo ship full containers by doing a cost of 1 ship alone . Is this new norms for people working like this as we notice lately elsewhere in jobs people doing 5 employee jobs by cost one employee doing 5 hours ??
I would figure that a ship would have some warning device that could be heard/seen miles to alert those in the near vicinity,
that would still work with the power out. Inexcusable to not have warning device.
He's to young to remember the skyway bridge collapse when it was struck by a ship and it was in the middle of the night with fog and a guy turned around and drove back to the toll both and made them close the bridge because people were driving off the end many people died
The Sunshine skyway in Tampa 45 years ago?
Pretty spooky to imagine driving off a missing bridge section like that
And yet no one is saying " no bridge could have survived that ship hitting it" just pointing fingers and saying why did it fall!!
Like to know what Bridges Dr Sen says where they could withstand this load?
Concrete rebar rusts when exposed to seawater, and when it swells up, it cracks the concrete, providing a potential disaster.
I have it on Hollywood's authority that it takes super-powered mutants like Magneto to destroy bridges.
Is it possible to build super duper bumpers around the footings?
❤HE LOOKS SO YOUNG!!AND HE'S A PROFESSER!!
It’s pretty easy to be a professor. I was 23 when I became one. I was shocked at how easy it was.
@@jademuntz With a PhD too? 4yr bachelor's degree plus several years of graduate study, seems you'd have to be up around 25 to complete a bachelor's.
This prof could pass for 14.
not sure how many tonnage that ship is with cargo, but that bridge looks pretty slight in comparison
In this episode Gilligan IS the Professor.
That low railroad bridge on KK ave, I hit that once 🙈🙈🙈
I'm willing to bet that long ago "some damn engineer" recommended protective piles/caissons around those spindly bridge supports, yet he was ignored.
A mark against capitalistic drive to make profit, at expense of ‘doing a good job & using the better materials’. Same with the huge ships made to carry ever more cargo, grab the profits. Get the money at all cost, in the vein of Bankman-Fried, et al
@@bowerbird7463 My comment had nothing to do with capitalism and/or profits. I'm not positive, but it's reasonable to assume that the GOVERNMENT had control of the requirements of the contract and simply awarded it to a contractor, who was only obligated to build the bridge according to government plans and specs. My point was that the awarding authority (usually a government agency) should've foreseen the need for protective "bumpers" around the vulnerable bridge pier and should've put that into the contract requirements.
Francis Scott Key bridge open on 23 March 1977.
Was the harbor master piloting this ship or was it the crew?
It would not be the harbour master that is not his or her role.
It had two local harbour pilots onboard.
He’s a child.
This has nothing to do with bridges in Wisconsin. I'm an engineer. This has everything to do with costs. Accidents happen and people get killed all the time. This was preventable, certainly up to the bridge...
the problem was not with the bridge nor the civil engineers but with the greedy shipping companies--overly large ship, small opening, no tugs attending, going too fast, and a ship with an ongoing fuel problem
The bridge that allow massive container ship with full load to pass through should not be that fragile..
Some of the bridges in US are too old and need to repair or rebuilt.
That guy is a professor? What is he 12?
there should of been barriers built on an angle to prstect the bridge pillers / stands holding the bridge up, after all at the time of the build th ships were much much smaller, this ship was at least 2X the size of a ship in 72 it might of been 3X the size of a ship in 72. so bigger ship more mass of wt as it hit the bridge piller / up right post to hold the bridge up,, nothing wrong with the bridge at all, what was wrong there was NO PROTECTION FOR THE BRIDGE PILLER / UP RIGHT POST...
But then maybe such huge ships, shouldn’t be designed, or keep well away from any bridge (which is impossible)!? Capitalistic greed for profit results in big ships & flimsy bridges
Looks like explosions at 3 possibly 4 areas on top of bridge
Here we go.........
The bridge that went nowhere was made out of American steel and it almost collapse at one time in the past😂
How about, more robust design?
And people drive over bridges everyday trusting that nothing bad will happen
"This is not going to happen everyday" This goes without saying doesn't it?
And that’s why that infrastructure act was important
Yeah whatever happened to built back better and infrastructure package yeah I guess that was written on a block of ice right
Is this Shaggy's little brother?
I mean how hard it is to measure all the bridges and provide that info to Cargo Trucking companies? They can even install sensors on bridges and trucks alerting the driver the truck will not pass under and they need to use an alternative route. We live in the age of technology but technology is mostly used for political propaganda and not where it is most needed.
Or drivers could put their damn "technology" down and pay attention to the road and the signs alerting them to a low bridge 🤨
@@johneckert1365 Firstly, not all bridges have signs. The signs on the bridge aren't always visible it's written on the bridge itself, so you can only see it when you are passing under it.
@@vkrgfan All low bridges are marked Honey 🍯
Domino structure design. 😅😅😅
Old infrastructures in the USA desperately need upgrading. Yes USA was way ahead for many decades but the new builds in other countries are much better. USA’s infrastructures are getting outdated.
Scary in a sense??
Ha haha! Kiss Missouri's wake we've been rebuilding and refurbishing all our bridges for at least 5 years now! We're always 10 steps ahead of everyone else!
Bean counters run the world. Coulda, shoulda had, tugs till past bridge, dolphins protecting bridge piers... but those cost money and we can't have that.
FRANCIS SCOTT KEY THE STAR SPANGLED BANNER NATIONAL ANTHEM SING IT WITH ME
Ha haha! Kiss Missouri's wake we've been rebuilding and refurbishing all our bridges for at least 5 years now! We're always 10 steps ahead of everyone else! 😂😂😂
@jamesmorton4976 because it's name is Springfield oughta be your first indicator! 🤣🤣🤣 Nah man, that's where the druggies go to blend in and sell or consume or both, then they realize if they leave that they won't be able to get drugs as easily! Also, the Mayor says he's an independent, but his policies are as bad as any blue run Municipality, if they tell you they're an independent in Missouri, it's because they don't want you to know they're a Democrat!
he provided absolutely No actual Engineering expertise, Very, very, Very politically correct answers; No engineering at all! A Bridge that collapses completely, after one single point of failure! Wow! and you think the design, had nothing to do with It! this structure was clearly in tension, and it snapped; having no redundant support, ideally we would have multiple support to counter the failure of one single Point!
Look around there’s more out than u know
Two things come to mind straight away: first off, that ship should have had a pilot on board who is intimately familiar with the port and in control of the ship until it is berthed, and should have known exactly the specifications of its length, width, height, weight etc. And secondly, our entire countries infrastructure is in dire need of being completely overhauled and having an influx of resources to rebuild and or replace the numerous bridges, tunnels, railways, freeways and roads. These are things that might happen if we had someone in office who gave a flying fugk about this nation. Hmm?? Just saying….🤨🙀🇺🇸🇺🇸⚓️⚓️💪👊
there was a pilot on board
The crew was from India
@@psysword Interesting conversations attract interesting people *and ...conversations.*
Echo-chambers silence all but the most holy, whom eventually self-suffocate from said lack of dialogue.
In YOUR CASE; Silence is golden, duct tape is silver.
The answer is obviously keep sending money to other countries
engineering Professor he looks like a first-year student🤣🤣🤣🤣🤣🤣🖕
I wonder if there is a few Ukrainians thinking Kerch Bridge looking at this.
Please don't talk of wanton destruction. Build.
That kid is no "professor". A professor is the highest faculty rank in a university and most of if them are in their late forties or fifties. That kid looks like a high school punk.
Maybe if the wealthy were paying their fair share of taxes we could support our infrastructure. Tax the obscenely wealthy corporations and their CEOs what they were in the 1950s and 1960s!
The mismanagement of our tax dollars is a bigger problem. They’re spending trillions on foreign aid when we have our own problems. Taxing corporations more will not remove the 35 trillion dollar sink our government is in.
That's part of the problem, but they don't want infrastructure in the US because they don't want labor to be too powerful. That's one big reason why they've let it rot. They are focused on overthrowing Vladimir Putin and destroying China.
The wealthy pay more than their share in taxes. If you want to go there. It more relevant to bring up the way our tax dollars are spent. like funding wars across the globe that have nothing to do with us or housing illegal immigrant giving them care instead of enforcing the laws that have been in place to have some control. This administration in particular spends our tax dollars on everything that has nothing to do with us as citizens. Our safety is of no concern to them. Not a bridge Not a dangerous person crossing our borders illegally to cause us harm. We are nothing but dollar signs and a vote to keep them in power. Well at least these swamp creatures never got my vote
I don't disagree with you but the bigger problem is priorities. U.S. government is borrowing money to fund wars and 'juice' the economy right now. It would not have been a huge cost to put in bulwarks of concrete or even cheaper material to protect the pylons. The bridge was basically naked and unprotected -- now it will be a huge expense to replace it.
U.S. is going to be spending a trillion a year just on interest very soon. The priorities are insane and they have nothing to do with building a future for Americans.
maybe if we quit funding other countries we could upgrade our infrastructure
Professor Zogbot remains conspicuously quiet about engineering anomalies of IX-XI. Zero integrity, zero honor, zero courage.
they knew exactly where to hit it. listenin to another child on the matter
well quit sending trillions of dollars over seas and use that to repair or build new ones
I say it was a terrible design!
Watch the collapse. Look how the far right section teeter tots on the pier. There should have been another support there, although it would not have prevented the center portion from collapsing. Barriers at water level around the main supports would have helped.
God bless those who died, and the one survivor. 🙏🙏🙏
There are no more accidents. Bad actors are involved in it. Black Swan.
Tammy Baldwin says that bridge was made out of American steel and destroyed by Muslim demolition men
Built by Democrat's, hence the issue.
If Japanese designed it then it would still be standing
The build started in 1975, open in 77. Gerald Ford a republican was in power.
Using a human tragedy for political stunts is not cool, not cool at all
A major bridge with nothing protecting the piers despite the risk of collision from marine traffic? In regions where ice flows may impact a bridge during spring breakup piers are protected with rip rap. Essentially a tiny island is formed by dumping rock and soil. This is the cheapest material and the easiest to place. The cost of this protection relative to the cost of the bridge is not considerable. If a pier is surrounded by a coffer dam soil can be dredged from the river bed and pumped into place forming an island.
Finally a media outlet which does not blame the ship
Uh, it is still the ships fault. The bridge did not collapse on its own.
@@ohsweetmystery The bridge would not have collapsed if it were build properly.
@@Manigo1743Bridges are not meant to participate in a demolition derby with an opponent far bigger than himself. That bridge did it's job for nearly 50 years just as it was intended to.