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dik said:Were you able to determine if the failure occurred at the ends of the web members or at the panel point?
winelandv said:A defense of the design:
To the structurals here, who hasn't, at the behest of an architect, worked their tail off to make something superflous work? Is that not part of our job? Ok, so the "cable stays" really aren't. So?
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Like this ones:drawoh said:Okay, I am mechanical, not civil or structural. If management is determined to make it cool, ask for a budget. Maybe you will get a big one! I perceive rule 2 as an artistic issue, but maybe there is a structural component too.
I also thought about this. Specially since in the transit video it seems like 2 of the 4 support points were between the nodes instead of directly underneath the nodes and there were no load distributing elements between the bridge deck and the supports that moved the bridge into place. However, even if that was a screwup and the concrete on the deck was cracked as a consequence (which may be what that engineer's voicemail message was about), the bottom deck only would have tension forces going through it once the bridge was placed in it's final position, which (I guess) would mean that the concrete would not be taking much stress. The bottom slab is in tension so the steel tendons would be doing all the work. So a crack on the bottom deck should not have been an issue, right?... Unless perhaps, if the crack was not between two nodes but rather quite close to one of the nodes where the diagonal elements meet.LittleInch said:I've also been wondering if the bottom slab got damaged/ cracked during the lift due to reverse of anticipated loads / sheer.
Ron said:There did not seem to be much, if any, lateral mild steel reinforcement across this interface.