Once Again, Texas
Once Again, Texas
(OP)
It's not too often I get to link to ESPN.
http://espn.go.com/dallas/story/_/id/10528972/crac...
http://espn.go.com/dallas/story/_/id/10528972/crac...
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Once Again, Texas
Cracks that wide would be due to settlement or some other unanticipated movement of the structure no?
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http://strasenphotography.photoshelter.com/gallery...
So you can get a sense on the construction materials used.
RE: Once Again, Texas
So if there were cracks on the mid-plaza area per the photo I attached then that would suggest a structural design issue vs. soil movement (Texas has expansive clays).
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RE: Once Again, Texas
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Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
RE: Once Again, Texas
http://www.pbk.com/?id=308&ft=Stadiums&gid...
I agree with the price tag.... but I don't live in TX so I'm probably not meant to get it.
RE: Once Again, Texas
Probably financed by a gift from some Texan oil tycoon
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http://www.nbcdfw.com/news/local/Eagle-Stadium-Con...
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“Know the rules well, so you can break them effectively.”
-Dalai Lama XIV
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http://msn.foxsports.com/other/story/texas-high-sc...
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http://www.dallasnews.com/news/metro/20140519-excl...
Maybe it was the perfect storm of poor design and shoddy construction.
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RE: Once Again, Texas
The photos I saw don't show cracks that wide.
The article mentions stirrups spaced too far apart. It will be interesting to read the report as I'm always curious about how engineers can get things wrong (lessons learned!).
RE: Once Again, Texas
The reported design overstress/overload of 10 or 20 percent is not be enough to cause that kind of cracking under self weight I think. Something else is seriously wrong with the materials or the construction. I take the "isolated" 70% overstress with a grain of salt at this point since the cracking is so widespread. FEA analysis can give wildly unrealistic "isolated" min/max results if that is what they are using.
I wonder how they made that crack map. Maybe a total station and an EI or two?
RE: Once Again, Texas
You may be seeing something different than that quote, but that is a very vague quote that could be interpreted a number of ways.
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I've mistakenly used the beam depth divided by 2 for maximum stirrup spacing, when it's supposed to be "d" divided by 2. I hope nothing will fall down because of it!
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Looks like a typical cast-in-place concrete skip-pan joist system. The multitude of cracks on the bottom of the slab don't imply a structural issue - this looks like shrinkage cracks or some kind of material failure.
RE: Once Again, Texas
The game of horseshoes is big in TX, so you'd think they wouldknow how to design and build a horseshoe shaped stadium! How hard is that?
Mike McCann
MMC Engineering
RE: Once Again, Texas
Skip joists are generally used for roofs not floors, especially floors that would require a 100 psf live load.
RE: Once Again, Texas
I agree that such widespread cracks don't look as much structural as they do a general material failure. If the slabs were under-reinforced, they are still one-way slabs and the cracks would show that. They are all criss-crossing, so maybe shrinkage or just poor curing? It gets hot in Texas, maybe they didn't keep it wet/cool enough?
Definitely keep us posted on any findings that come in!
RE: Once Again, Texas
http://www.businessinsider.com/high-school-footbal...
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But some of those cracks looked much larger than 0.02". Some appeared to be close to 3/8".
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http://www.dallasnews.com/news/community-news/alle...
And repairs beginning:
http://c2.allenisd.schoolwires.net/Page/382
RE: Once Again, Texas
http://www.allenisd.org/cms/lib/TX01001197/Centric...
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