Nottingham UK car park COLLAPSES
Nottingham UK car park COLLAPSES
(OP)
Nottingham car park COLLAPSES with vehicles left dangling 50ft off edge:
http://www.express.co.uk/news/uk/843248/nottingham...
Looks like some kind of edge cantilever-spandrel assembly didn't have adequate rebar development into the main slab.
http://www.express.co.uk/news/uk/843248/nottingham...
Looks like some kind of edge cantilever-spandrel assembly didn't have adequate rebar development into the main slab.
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RE: Nottingham UK car park COLLAPSES
Hypothesis: the structure has been weakened by numerous small impacts from vehicles nudging the wall cast upon the cantilevered section. It doesn't look like it is really designed to take that kind of impact, although it should be a reasonably forseeable event to accommodate within the design.
Of course I could be completely wrong.
RE: Nottingham UK car park COLLAPSES
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RE: Nottingham UK car park COLLAPSES
RE: Nottingham UK car park COLLAPSES
I'm not sure when that car park dates from (the 1970's?) but I could pretty much guarantee that vehicles of today are heavier than those which were commonplace at the time of construction.
Yes, the cantilevered slab looks very thin to these non-structural eyes.
RE: Nottingham UK car park COLLAPSES
Good video Link
Large Photos Link
RE: Nottingham UK car park COLLAPSES
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RE: Nottingham UK car park COLLAPSES
Past the spandrel girder in the cantilevered section, only a relatively thin slab was used, and as I pointed out above, not much reinforcement can be seen.
RE: Nottingham UK car park COLLAPSES
And no sign of any significant top slab steel to serve the cantilevered slab - unless the few bars sticking out on the right of this photo represent what was provided.
Either they were terribly detailed, installed or corroded directly off at the cantilever launch point:
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RE: Nottingham UK car park COLLAPSES
RE: Nottingham UK car park COLLAPSES
Bad batch of rebar? I don't think so. Whatever it is, probably just not enough of it, and now none left.
RE: Nottingham UK car park COLLAPSES
I think the remainder was re-anchored with more re-bar, maybe fiberglass, epoxied in place to avoid corrosion.
The highway dept just assumed that since the rust stains had been there for a long time that everything was stable.
http://photos.mycapture.com/STLT/237605/14274939E....
The photo is of the temp solution - counterbalancing the remaining sidewalk and closing off the opening.
RE: Nottingham UK car park COLLAPSES
We had a problem like that south of Winnipeg with repair using FRP reinforcing... and the crack developed at the end of the FRP material. Termination was all at the same location... no staggering of reinf. Was headed to court, but, don't know what happened.
Dik
RE: Nottingham UK car park COLLAPSES
Dan - Owner
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RE: Nottingham UK car park COLLAPSES
RE: Nottingham UK car park COLLAPSES
TTFN (ta ta for now)
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RE: Nottingham UK car park COLLAPSES
Dik
RE: Nottingham UK car park COLLAPSES
I agree it's about 9m to the bottom of the fractured slab, so 30' or so.
RE: Nottingham UK car park COLLAPSES
That said, however, a more complex version of that managed to stump a more than few students in freshman physics at my school.
TTFN (ta ta for now)
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RE: Nottingham UK car park COLLAPSES
RE: Nottingham UK car park COLLAPSES
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Nottingham UK car park COLLAPSES
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Nottingham UK car park COLLAPSES
I thought the same. Plus the way it cleaved away smoothly, suggesting a topping mix with small pea gravel aggregate, compared to the coarse break of full sized aggregate used during the original concreting around the columns & elsewhere. Efflorescence suggests there may have been a full depth cracks for some time. Make me wonder if the cantilevered section was a historic low spot and bird baths pooled along the wall when it rained.
RE: Nottingham UK car park COLLAPSES
RE: Nottingham UK car park COLLAPSES