Delaware River Bridge Closure
Delaware River Bridge Closure
(OP)
http://www.enr.com/blogs/11-mid-atlantic-monitor/p...
Looks like a deck truss. Must be continuous near this location for the top chord to fracture.
IC
Looks like a deck truss. Must be continuous near this location for the top chord to fracture.
IC





RE: Delaware River Bridge Closure
RE: Delaware River Bridge Closure
(TLDR) Karl Frank, professor emeritus UT Austin suggests fracture due to a bad plug weld on mis-drilled holes (during fabrication).
RE: Delaware River Bridge Closure
RE: Delaware River Bridge Closure
That said, Mr. Frank is a bolder man than I to come to that conclusion so quickly.
RE: Delaware River Bridge Closure
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RE: Delaware River Bridge Closure
Lomrandil - star for posting an article with a reasonable answer. Thanks!
Looks like the crack is offset from where the holes would theoretically be.
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RE: Delaware River Bridge Closure
RE: Delaware River Bridge Closure
That's amazing that the paint contractor hears a loud pop, the bridge shakes, then proceeds on as if nothing happens and either doesn't notify the resident engineer or the engineer doesn't move quick on it.
These structures have more redundancy than we give them credit for. But who knows what element is paying the price to keep it up.
RE: Delaware River Bridge Closure
Redundancy/continuity saved the bridge. Interesting, and counterintuitive to me, that the top chord on the other side went into compression.
RE: Delaware River Bridge Closure
RE: Delaware River Bridge Closure
I noticed they considered this a brittle fracture.
When you think about it, right now they have two - two span trusses instead of a 4 span truss.
RE: Delaware River Bridge Closure
Especially if the final fracture area was only a small portion of the total section (hence the energy/sound was less) -- I might not have thought too much of it if it wasn't related to the work I was doing (e.g painting).
RE: Delaware River Bridge Closure
http://www.burlingtoncountytimes.com/news/local/re...