Partial Collapse of Building Under Construction
Partial Collapse of Building Under Construction
(OP)
Two people were critically injured in a partial building collapse of a building under construction in suburban Chicago Illinois on Monday afternoon, December 28, 2020, Westmont village officials said. A spokesperson for the village said around 12:30 p.m. there was a partial collapse at a new multi-use condominium building under construction at the intersection of Cass Avenue and Quincy Street.
Quincy Station
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Quincy Station
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RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
John R. Baker, P.E. (ret)
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RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
Precast is great in concept, at least.
The robustness of the connections is what gives me the most heartburn.
My strong hunch is that partial collapses during construction occur with precast structures (like the one in this post) far more than cast-in-place concrete or structural steel erection.
Can't prove it, that's just my sparse data set in the framework of my biases.
Aside: Does anyone know of a national database - say from OSHA or similar - which tabulates and logs these events, and makes available to the public?
OSHA has a lot of very good after-incident detailed reports, but I have not seen a comprehensive database.
RE: Partial Collapse of Building Under Construction
If done right, precast is great... attractive finish, and can be economical... I've done numerous precast buildings, including those in seismic areas.
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
I haven't dug into it myself, but I did find this:
https://enforcedata.dol.gov/views/data_summary.php
RE: Partial Collapse of Building Under Construction
any suggestions why the column would be split? I cannot think of any, not with the large wide precast beam over.
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
Maybe torsion from the beam cause a pry-out type failure of whatever dowel type fastener they had into the top of the column? That's my best guess. You'd think there'd be enough ties near the top of the column to prevent that however.
RE: Partial Collapse of Building Under Construction
Don't feel bad... I couldn't think of a good reason, either...
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
Maybe that is what has made the crack on the right pillar or the pillar has not been completely dry inside, due to the water inside the pillar, the water has frozen and expanded until it cracked.
BR A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
Then my guess is only that on the left side in the yellow circle, water has been accumulated between the elements and then frozen and expanded so that the roof beam has been pushed to the right.
Best Regards A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik
RE: Partial Collapse of Building Under Construction
RE: Partial Collapse of Building Under Construction
on line with search engine
https://www.osha.gov/data
same data in flat file form
https://enforcedata.dol.gov/views/data_summary.php
This search will pull a list of fatality accidents involving collapses, most are either building or excavation collapses. The list is shorter than I expected, perhaps many collapses do not result in fatalities?
https://www.osha.gov/pls/imis/AccidentSearch.searc...=
Fred
RE: Partial Collapse of Building Under Construction
This comment could be applied to almost any domain, like, "If flown right, the 737 Max has no problems." But most construction failures are a combination of designer and contractor frailties, and lack of anticipating what might go wrong when humans and randomness are involved.
Possibly a better question is, how likely is this system to exhibit construction problems (like partial or complete collapse) as compared to other structural systems.
Some designs seem to demand CJP welds on intersecting thick steel plates, but I avoid them because of the inherent problems, and the lower probability that the final construction will perform like my FEA; so instead, I bias my designs toward PJPs on thin steel plates.
RE: Partial Collapse of Building Under Construction
Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?
-Dik