sashwa
Pixie Cat Crunchin' n Foldin'
Premium,Mod
join:2001-01-29
Alcatraz
clubs:  | Bay Bridge cable .....
A cable has broken loose on the eastern span of the Bay Bridge, striking several cars. The damage is in the area of the newly installed S-Curve.
»cbs5.com/ |
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PrntRhd
join:2004-11-03
Fairfield, CA
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1 edit | Glad I am off this week and don't have to commute to SF.
That is half of the "repair" that was put on over Labor Day holiday. I recognized the part when I saw it on the TV news feed. |
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sashwa
Pixie Cat Crunchin' n Foldin'
Premium,Mod
join:2001-01-29
Alcatraz
clubs: | So far no injuries reported except for being shaken up. The one car I saw on the news is a mess and it's amazing that the occupants weren't hurt. |
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
·Comcast Formerly ..
1 edit | reply to sashwa
One injury from broken windshield glass, said to be not serious.
I am more concerned about the bridge staying open, the cracked structural piece they found on Labor Day was NOT replaced, they put this "splint" around the cracked area, now that part broke and we are back to the original problem at a minimum.
The problem area is not in the S-Curve area section itself, it is in the truss section before the S-Curve. |
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sashwa
Pixie Cat Crunchin' n Foldin'
Premium,Mod
join:2001-01-29
Alcatraz
clubs: | Thanks for the clarification.
I wonder if the high winds had anything to do with it snapping? |
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
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4 edits | No, I think it was simply a failed fix, they put that splint onto the cracked area, pulled the cable tight, and the tensioned cable was supposed to take some of the load off the weakened area to prevent the cracked part from opening up. The splint part was not strong enough and blew apart. The cable you see on the TV pics is the cable that was pulling the splint to take the load, the metal piece you see is a section of beam that was half of the splint.
Poor engineering on someone's part. They said no one had tried this repair on a bridge before back when they installed it.
The original part that is cracked is shaped like the end of a dog's bone with a huge link pin in the end that connects to a similar link. |
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
·Comcast Formerly ..
| reply to sashwa
And the other shoe just dropped, the BAY BRIDGE WILL BE CLOSED for at least 24 hours:
"officials are shutting down the San Francisco-Oakland Bay Bridge in both directions Tuesday night to assess possible structural damage after repair work made to the bridge last month came loose. California Highway Patrol Officer Peter Van Eckhardt said the bridge will be closed for at least 24 hours." |
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shinjuru
Premium,Mod
join:2000-10-29
California | reply to sashwa
Well, as tough as this will be on commuters in/out of the city, the old cliche is appropriate here.
Better safe than sorry. |
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GemSnake
Premium
join:2000-10-19
3rd layer
clubs: | reply to sashwa
Gonna call in tomorrow. No way in hell I'll be doing that commute. |
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
·Comcast Formerly ..
2 edits | reply to sashwa
You cannot imagine the forces acting on those eyebars, the Bay Bridge is unbelievably heavy and the eyebars are there to distribute loads on the main truss sections to keep them from changing shape and collapsing under regular load conditions. That type of single eyebar failure dropped a whole bridge in an incident in December 1967 over the Ohio River between W Virginia and Ohio killing 46 persons. Just do a search for "Silver Bridge Collapse". Edit, not exactly the same as the Bay Bridge but the cracks in the Bay Bridge eyebar pin area is the same type of failure.
»www.open2.net/sciencetechnologyn···ree.html |
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Jtmo
Premium
join:2001-05-20
Novato, CA
·Comcast
| reply to sashwa
Bay bridge is falling down, my fair lady.......
They better hurry up before 4000+ people fall into the bay someday soon.
The last time I felt this way about an poorly engineered roadway was back in 1989, I got off the Cypress, took the surface road down by the steel mill. The design to me said unsafe, 30 minutes later, EQ and the whole thing pancaked just like I always feared. |
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Wily_One
Premium
join:2002-11-24
San Jose, CA | reply to sashwa
Wow, I did not hear about this before now. I'm glad I don't have to cross the bay! |
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
·Comcast Formerly ..
2 edits | reply to sashwa
Wikipedia is already running updated information on the problem in the history of the bridge:
»en.wikipedia.org/wiki/San_Franci···y_Bridge
"Engineers have known the cantilever section would likely fail in a major quake for at least 30 years"
An anonymous quote but it is true. |
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Gbcue
E.I.T.
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join:2001-09-30
Santa Rosa, CA
clubs:
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| said by PrntRhd  :Wikipedia is already running updated information on the problem in the history of the bridge: » en.wikipedia.org/wiki/San_Franci···y_Bridge"Engineers have known the cantilever section would likely fail in a major quake for at least 30 years" An anonymous quote but it is true. Time for infinite $ for civil engineering.
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PrntRhd
join:2004-11-03
Fairfield, CA
·Comcast
·Comcast Formerly ..
4 edits | No, time to get the span replaced. 20 years after Loma Prieta and still not fixed.
"Abolhassan Astaneh-Asl, a civil engineering professor at the University of California, Berkeley who has spent 20 years studying the Bay Bridge, called the initial crack a "warning sign" of potentially bigger safety issues with the bridge.
"The repair they were doing was really a Band-Aid," said Astaneh-Asl, who criticized Caltrans at the time for rushing to reopen the bridge. "The Band-Aid broke, in essence."
Astaneh-Asl said the failure of the repair job demonstrates the need for a longer-term solution. The span's age and design make it susceptible to collapse, especially if commercial tractor-trailers are allowed to continue using it, he said.
"I think Caltrans is putting public relations ahead of public safety," he said."
I was in South San Francisco in 1989 during the quake and we were fed a lot of information by CalTrans public relations after the Cypress Freeway collapse and during the initial SF I-280 repair:
"Double deck freeways are perfectly safe designs"
"The western approaches to the Bay Bridge held up perfectly in the quake, they are safe"
"No need to remove the Embarcadero freeway, it can be retrofitted"
After the 1989 deck collapse:
"The repair we did on the Bay Bridge is safe, motorists will not even know where the problem occurred" |
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GemSnake
Premium
join:2000-10-19
3rd layer
clubs:
| reply to sashwa
Re: Bay Bridge cable .....
That's one memorable vacations...
»www.nbcbayarea.com/news/local-be···ml?tsp=1
Evelyn Mau and her husband got a rough start to their Bay Area vacation. The couple, who had just flown in from Canada, had no idea what hit their rental car as they drove over the Bay Bridge during Tuesday's commute.
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"In a fight between you and the world, bet on the world." - Franz Kafka |
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Boricua65
join:2002-01-26
Puerto Rico
| reply to PrntRhd
said by PrntRhd :No, time to get the span replaced. 20 years after Loma Prieta and still not fixed... The two Browns held up the Bay Bridge replacement along with some others that had to stick their nose in it, or else the bridge would've been done by now  .
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Illegal aliens have always been a problem in the United States. Ask any Indian. Robert Orben
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sapo
I eat meat
Premium
join:2002-09-16
Sacramento, CA | reply to Gbcue
Hopefully not public
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DO DO |
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