Must ban bridges on college campuses immediately!
- Thread starter Supersubes
- Start date
I saw that you know what we need.
We need building codes. Something that builders/engineers would have to follow WITHOUT fail. Then these kind of things would NEVER happen. Hire some inspectors to keep them honest. Oh boy we just made a huge leap in society, we are so advanced now. sarcasm off.
We need building codes. Something that builders/engineers would have to follow WITHOUT fail. Then these kind of things would NEVER happen. Hire some inspectors to keep them honest. Oh boy we just made a huge leap in society, we are so advanced now. sarcasm off.
Assault bridges are not meant for civilians and should be restricted. There is no Constitutional right to own assault bridges.
Low bidder job or high bidder with payola.
Low bidder job or high bidder with payola.
Exactly. Someone diluted the concrete. You know, like so many SE Asian White Elephants I've seen on my travels. Amazing.
Add Script Safe and then most sites nag warnings about ad blockers don't show up.
(It is a bit of a pain as almost every site you use, you will have to when you go there for the first time see what scripts you will and will not allow).
It also protects you from a lot of other nasties, so worth the trouble.
First-of-its-kind pedestrian bridge “swings” into place. “FIU is about building bridges and student safety. This project accomplishes our mission beautifully,” -President Mark B. Rosenberg. http://bit.ly/2IihmUm #worldsahead
Damn, they are going to be eating those words.
Damn, they are going to be eating those words.
The funny thing on that job is that it was, in fact, set up like an assault bridge! Built on-site (campus land) near the road and pivoted onto concrete pylons over the weekend. All set up to be pre-fab and fast to put up! They should have just bought an old Bailey!
My first thought... poor concrete... full of talc and done under graft and low standards. Like everything in a S**thole! And, well, it is Miami!
Can't wait to hear the engineering post-mortem on this one!
Cheers,
Sirhr
From the Article/Press Release on the opening of the bridge:
The 174-foot, 950-ton section of the bridge was built adjacent to Southwest Eight Street using Accelerated Bridge Construction (ABC) methods, which are being advanced at FIU’s Accelerated Bridge Construction University Transportation Center (ABC-UTC). This method of construction reduces potential risks to workers, commuters and pedestrians and minimizes traffic interruptions. The main span of the FIU-Sweetwater UniversityCity Bridge was installed in a few hours with limited disruption to traffic over this weekend.
“This project is an outstanding example of the ABC method,” said chair of FIU’s Civil & Environmental Engineering Department and director of FIU’s ABC-UTC Atorod Azizinamini, who is one of the world’s leading experts on Accelerated Bridge Construction. “Building the major element of the bridge – its main span superstructure – outside of the traveled way and away from busy Eighth Street is a milestone.”
^^^ So Akbar Azizclockbomminijijad.... Were you using actual concrete? Or was this the new green "Mud and wattle" method perfected in Middle Eastern s**tholes... Or did you just build a little one in Lego and decide Insallah, this will work fine!
In addition... news is saying that when they put the bridge in place, it was spanning 8 lanes plus... with no support column in the center....
Boowah ha ha hahah ah hah aa......
Sirhr
The 174-foot, 950-ton section of the bridge was built adjacent to Southwest Eight Street using Accelerated Bridge Construction (ABC) methods, which are being advanced at FIU’s Accelerated Bridge Construction University Transportation Center (ABC-UTC). This method of construction reduces potential risks to workers, commuters and pedestrians and minimizes traffic interruptions. The main span of the FIU-Sweetwater UniversityCity Bridge was installed in a few hours with limited disruption to traffic over this weekend.
“This project is an outstanding example of the ABC method,” said chair of FIU’s Civil & Environmental Engineering Department and director of FIU’s ABC-UTC Atorod Azizinamini, who is one of the world’s leading experts on Accelerated Bridge Construction. “Building the major element of the bridge – its main span superstructure – outside of the traveled way and away from busy Eighth Street is a milestone.”
^^^ So Akbar Azizclockbomminijijad.... Were you using actual concrete? Or was this the new green "Mud and wattle" method perfected in Middle Eastern s**tholes... Or did you just build a little one in Lego and decide Insallah, this will work fine!
In addition... news is saying that when they put the bridge in place, it was spanning 8 lanes plus... with no support column in the center....
Boowah ha ha hahah ah hah aa......
Sirhr
Wow, I was gonna say the company that designed and or built it has probably closed its doors and headed for Cuba by now.
But it’s an inside job at the university...oops!
I went to an engineering college for undergrad... a very good one, in fact.
But there were two buildings on campus that were tributes to NOT doing things 'inside.'
One was the Library building. Which was sinking into the soil at the rate of something like 1/4" a year. Because it was designed... without taking into account that it would be full of books. Which weigh a lot more than air or students sitting at desks. So it sat on foundations designed to carry a 'normal' building weight. When it was filled with tens-of-thousands of tons of paper....
The other one was even better.... the Science Center was bought as a design which was made to radiate maximum heat... because it was supposed to be built in Arizona or New Mexico. But the university down South never built the building and the architectural firm sold the plans to recoup its $$... as a 'turnkey' project that another university could simply site and build. Our trustees 'bit' on trying to save all kinds of architectural firm costs by buying a cut-rate set of finely-engineered plans. Building had lots of poured concrete, beams that were made to conduct heat to the outside. Windows that were 'opposite' passive solar. Overhangs that kept the sun out, even in winter. It was a brilliantly-engineered building that had everything designed to keep it cold in the desert and minimize air conditioning costs. Even the HVAC was outstanding for a desert climate. But it was BUILT in far upstate New York... in one of the coldest counties, in fact, in the lower 48! It did a great job of radiating maximum heat for sure! The engineers knew their stuff when it came to building hot-climate buildings! I don't remember being in a winter class in a room that was over 60 degrees... But the trustees did save some bucks... and the civil and architectural engineers... never spotted the oopsie.
So... lesson is that you DON'T trust your own academic weenies when "Those who can, do. Those who can't... teach engineering." You pay experts...
Cheers,
Sirhr
But there were two buildings on campus that were tributes to NOT doing things 'inside.'
One was the Library building. Which was sinking into the soil at the rate of something like 1/4" a year. Because it was designed... without taking into account that it would be full of books. Which weigh a lot more than air or students sitting at desks. So it sat on foundations designed to carry a 'normal' building weight. When it was filled with tens-of-thousands of tons of paper....
The other one was even better.... the Science Center was bought as a design which was made to radiate maximum heat... because it was supposed to be built in Arizona or New Mexico. But the university down South never built the building and the architectural firm sold the plans to recoup its $$... as a 'turnkey' project that another university could simply site and build. Our trustees 'bit' on trying to save all kinds of architectural firm costs by buying a cut-rate set of finely-engineered plans. Building had lots of poured concrete, beams that were made to conduct heat to the outside. Windows that were 'opposite' passive solar. Overhangs that kept the sun out, even in winter. It was a brilliantly-engineered building that had everything designed to keep it cold in the desert and minimize air conditioning costs. Even the HVAC was outstanding for a desert climate. But it was BUILT in far upstate New York... in one of the coldest counties, in fact, in the lower 48! It did a great job of radiating maximum heat for sure! The engineers knew their stuff when it came to building hot-climate buildings! I don't remember being in a winter class in a room that was over 60 degrees... But the trustees did save some bucks... and the civil and architectural engineers... never spotted the oopsie.
So... lesson is that you DON'T trust your own academic weenies when "Those who can, do. Those who can't... teach engineering." You pay experts...
Cheers,
Sirhr
Q
QuickNDirty
Guest
Holy hell the contractor has a history of bridges falling, and no one did nothing. The parallels with the Florida shooter are uncanny.
https://www.msn.com/en-us/news/us/f...ry-of-safety-complaints/ar-BBKhkeS?li=BBnbcA1
https://www.msn.com/en-us/news/us/f...ry-of-safety-complaints/ar-BBKhkeS?li=BBnbcA1
Meh, there are always a few punch list items at the completion of a job like this.....
Im sure they held 10 percent of contract until sign off.
At first glance my thought was post-tensioning failed. That or shitty concrete like the afore mentioned.
Both things could be true. The shitty concrete could have failed at where the the tension cable stays are embedded in the concrete. The cables would be pre tensioned on the side of road and post or re-tensioned after placement. They said they were stress testing the bridge at failure so this seems logical. They were testing and tensioning as needed. Just a guess.
They mentioned something to this effect on the "news" this morning.
Maybe even they were in the process of tightening when it shot shit.
R
The tension cables in the slab and overhead cover. They tighten and force the concrete into compression. Concrete is extremely strong in compression. The cables likely put the bridge in a slight upward arc causing weight applied to the bridge to force the concrete into even more compression. Concrete has little or no tensile strenght on its own. But the tension cables force it into compression.
My first question would be was the bridge anchored to the columns/piers or was it on skid/slip/expansion plates. I am no Engineer but there is a smoking gun here somewhere.
The library fiasco sounds like where I went to grad school at UMASS Amherst...every other floor was empty for the same reason
So story now is the the bridge was undergoing a stress test and final cable tightening. Great i am all for that. Why the hell were the lanes open then.
Anyone who wants to understand concrete and compression can look at hover dam and see it is arched into the water. Millions of tons of water compressing the concrete into the canyon walls.
Anyone who wants to understand concrete and compression can look at hover dam and see it is arched into the water. Millions of tons of water compressing the concrete into the canyon walls.
Good video I don't agree with it all but its sound thinking. The video of it falling that I saw it did not look like it cracked in the middle. I think the bridge was specifically designed to make that span without temp support in the middle. Material failure is big possibility they could have been Chinese steel cables. Bad concrete is a strong possibility too. Even bad workman ship is possible. If its bad engineering they all should be shot. A lot of people have to look at those plans. That would be a monumental eff up.
FSI, I see what you did there.
Bridges generally are a monument of some sort. And this one is monumentally F'ed Up!
Bridges generally are a monument of some sort. And this one is monumentally F'ed Up!
^^^ But the whole point of the 'exercise' was these special new A-rab engineered bridges that can get put up without disrupting traffic or causing inconvenience. ABC... Accelerated Bridge Construction. Build on the ground. Drop in place (literally, apparently) and be done in an afternoon. The whole University Engineering direction/specialty was in these things... to make a showcase. For professor Fabio.
I'm all for efficiency and lack of disruption... and the concept is appealing. But it has to come with some pretty damn rock-solid engineering and testing! How many of these were tested out on a giant field somewhere.... with nothing under them? How many times did full-size mock-ups get built and then destructive-tested... before declaring this to be a workable concept. To assemble with Mrs. Plusbottom and her minivan underneath?
Or did they just computer model it? And who made the computer model? Because, well, things in computer models are only as good as the programming.
We don't need to mock up every 'traditional' bridge. Because we have thousands of years experience... building bridges the traditional way. But this is a radical departure. Which is good. If it works. But radical departures come with risks. So either we test radical before deploying... or settle for the fact that you may be sitting in your car one moment listening to Freebird... and be a 6 inch pancake the next. Well, 7 inch pancake if you bought a Volvo. I hear they have some nifty safety features.
I'm amazed that they haven't found a tlattened Tercel with 9 Cubans in it... just 'sayin. Bring a sponge.
Cheers,
Sirhr
P.S. And what's with the need for all the cadaver dogs? I don't need a Belgian Malinoise who can sense a dead truffle 9 feet down and through 8 layers of plastic... to know that right next to whatever is left of the drivers-side-door on that 6-inch-thick electric-blue former Pontiac Aztek with the mag wheels and the contrasting fender flares... is a cadaver. I guess everyone just wants a chance to play... even the K-9's.
I'm all for efficiency and lack of disruption... and the concept is appealing. But it has to come with some pretty damn rock-solid engineering and testing! How many of these were tested out on a giant field somewhere.... with nothing under them? How many times did full-size mock-ups get built and then destructive-tested... before declaring this to be a workable concept. To assemble with Mrs. Plusbottom and her minivan underneath?
Or did they just computer model it? And who made the computer model? Because, well, things in computer models are only as good as the programming.
We don't need to mock up every 'traditional' bridge. Because we have thousands of years experience... building bridges the traditional way. But this is a radical departure. Which is good. If it works. But radical departures come with risks. So either we test radical before deploying... or settle for the fact that you may be sitting in your car one moment listening to Freebird... and be a 6 inch pancake the next. Well, 7 inch pancake if you bought a Volvo. I hear they have some nifty safety features.
I'm amazed that they haven't found a tlattened Tercel with 9 Cubans in it... just 'sayin. Bring a sponge.
Cheers,
Sirhr
P.S. And what's with the need for all the cadaver dogs? I don't need a Belgian Malinoise who can sense a dead truffle 9 feet down and through 8 layers of plastic... to know that right next to whatever is left of the drivers-side-door on that 6-inch-thick electric-blue former Pontiac Aztek with the mag wheels and the contrasting fender flares... is a cadaver. I guess everyone just wants a chance to play... even the K-9's.
Similar threads
