AARoads Forum

National Boards => Bridges => Topic started by: Alps on March 15, 2018, 05:38:23 PM

Title: Miami bridge collapse
Post by: Alps on March 15, 2018, 05:38:23 PM
http://www.miamiherald.com/news/local/community/miami-dade/west-miami-dade/article205316174.html


This was supposed to be a two span cable stayed bridge. One span was erected and left in place without cable supports or the second, counterbalancing span. Now it collapsed. I'm no structural engineer, but I'm not surprised that the pier collapsed with loading completely different than it was designed for. Any other thoughts?
Title: Re: Miami bridge collapse
Post by: Duke87 on March 15, 2018, 11:48:29 PM
Reminds me of an oft-repeated line from a crotchety old engineering professor where I went to school who refused to ever give partial credit on any homework or exam questions.

"You build bridge, bridge fall down, no partial credit!"
Title: Re: Miami bridge collapse
Post by: bing101 on March 16, 2018, 12:00:03 PM
http://www.latimes.com/nation/la-na-florida-bridge-collapse-20180316-story.html
Update 6 people dead at bridge collapse.
Title: Re: Miami bridge collapse
Post by: bing101 on March 18, 2018, 08:32:29 PM
https://www.npr.org/sections/thetwo-way/2018/03/18/594666683/all-victims-recovered-in-miami-bridge-collapse-police-say

Here is an update
Title: Re: Miami bridge collapse
Post by: DJStephens on March 24, 2018, 11:12:35 PM
Some reports stated a "stress" test was being conducted on the structure when it failed.  Perhaps that was post-tensioning?  One has to wonder the wisdom of conducting such as test on the structure over live traffic.   Did work on a project that involved post-tensioning, but it was a segmental design, with all segments in place between piers.   Likely some BSCE's here can more accurately comment, did take determinate and indeterminate structural design, but did not finish the degree, and found indeterminate to be a bear.   
Title: Re: Miami bridge collapse
Post by: roadman on May 23, 2018, 12:09:50 PM
Preliminary NTSB report on the collapse:  https://www.ntsb.gov/investigations/AccidentReports/Pages/HWY18MH009-prelim-.aspx
Title: Re: Miami bridge collapse
Post by: J N Winkler on May 23, 2018, 01:05:04 PM
"All aspects of the collapse remain under investigation":  this sounds to me like green-eyeshade study of the plans and erection procedure has turned up no obvious design errors or a priori reasons to expect the collapse to occur.
Title: Re: Miami bridge collapse
Post by: roadman65 on July 19, 2018, 11:56:58 PM
Lets hope the same mistake is not made in Orlando.  A pedestrian overpass was just built on US 17 & 92 and SR 50 east of I-4 last weekend.  Its not open yet but motorists on Colonial Drive have to pass beneath it.
Title: Re: Miami bridge collapse
Post by: bing101 on September 19, 2018, 06:36:43 PM
https://patch.com/florida/palmettobay-cutler/fiu-bridge-collapse-osha-fines-5-companies-safety-violations


Update 5 companies are fined for safety violations that lead to the bridge collapse.
Title: Re: Miami bridge collapse
Post by: sparker on September 21, 2018, 01:23:36 AM
https://patch.com/florida/palmettobay-cutler/fiu-bridge-collapse-osha-fines-5-companies-safety-violations


Update 5 companies are fined for safety violations that lead to the bridge collapse.

Great!  $17.33K mean fine per company; essentially a slap on the wrist.  What's that, a whopping 3 months' salary for the person who died in the collapse?  Let's just hope the courts see fit to apportion the fine to the degree of culpability for the firms involved.  I predict a considerably larger amount will cross the table once the lawsuits commence.   Of course, these firms will appeal the fine and stall any civil action as long as possible -- citing the appeal process, of course.  Betcha these firms won't part with a penny for 5 years or more! :banghead: