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human909 said:But reality doesn't seem to fit those drawings.
RandomTaskkk said:It doesn't make much sense that releasing compression from the strand would cause failure when the member is acting in compression anyways - technically you should be making the situation better (less compressive stress).
RandomTaskkk said:I'd thought about this, but (in my naivety) I find it hard to believe this was what caused failure. Surely you just need a teeny tiny bit more tension to back the nut off by hand. All you need to do is overcome the original pretension by a very small margin in order to free up the nut? .... But I could be wrong!
Ron said:there is some possible evidence of such an imbalance if you look at one of the photos of member 11 where the concrete had spalled along one side.
human909 said:There is a whole bunch of 'amateur' conjecturing and speculation going on in this thread but at least there is virtually instantaneous peer review. Plenty of new sign ups to this forum too (myself included) so who knows what credibility so many of these posts have. But that is the nature of community discussion and in the right contexts good conclusions can emerge.
In contrast Oliver McGee is an idiot, who reporters have no idea that they should ignore.
Ron said:there is some possible evidence of such an imbalance if you look at one of the photos of member 11 where the concrete had spalled along one side.
JAE said:I'm not sure "amateur" accurately characterizes those participating in this thread
dik said:There's probably a kazillion years of experience on Eng-tips.
TehMightyEngineer said:I wonder what would happen if eng-tips designed something collaboratively. Replacement bridge design anyone?
dik said:I noticed there was a lot of small particle debris, possibly from the concrete spalling from the chord members... I would not normally expect to find such relatively small parts. I've never encountered a failure so catastrophic and sudden.
hokie66 said:JAE,
That Oliver McGee character was on TV news, espousing that rubbish. I linked it in the first thread. He is some sort of professor at Texas Tech. He needs stopping.