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Miami Beach, Champlain Towers South apartment building collapse 151

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Ugh. Looks like a bomb site
 
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Interestingly there was a Magnitude 3.9 ‘earthquake’ off the coast of Florida in the last week caused by Navy bombing exercises.

It seems like a stretch to relate the two, but could it be ruled out as a cause?

Can someone with local knowledge give an idea of the seismicity of that area and whether a M3.9 earthquake would be significant compared to what it would (should) have been designed for in 1981?
 
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There is a underground parking garage under the portion of the building that collapsed.
 
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Gusmurr, when this building was constructed, Miami did not require seismic design. It would have been designed for significant winds though.

I can’t see the military exercise being the culprit. If I were doing the investigation, I would think corrosion first. We will have to see as it plays out.

Prayers to anyone trapped in the rubble or injured in this.
 
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That's total and complete system collapse. You couldn't get it to pancake like that if you tried to demolish it.

Looks like panel construction - echoes of ronan point maybe?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
 
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Approximate area of collapse.
SSC_tcb2af.jpg
 
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Cool_Controls, we’re did you get the information that there is underground parking? With the buildings proximity to the Atlantic, that would be a very complex design and construction.
 
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Wow! And tragic to put it in a single word. My thoughts and prayers are with everyone effected.

Does anyone if this building was concrete or steal framed? Or know any specifics?
 
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"Complete collapse of a part of the building" is a better description than "partial collapse."

My glass has a v/c ratio of 0.5

Maybe the tyranny of Murphy is the penalty for hubris. -
 
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This might be important:

Article said:
Authorities have not yet determined what caused the building to collapse but confirmed that renovations had been underway on the roof
Click to expand...

Overloading leading to progressive collapse?
 
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I cannot tell from the photos. Does it look like post tensioned construction or conventional rebar? Is 1981 construction too early for post-tensioning?
 
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Current Google imagery shows construction in the adjacent lot:

Screenshot_2021-06-24_100733_kkp4sg.png
 
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01_zh8sfb.jpg


02_bwiouw.jpg


04_nsx9su.jpg


08_wttdy6.jpg


11_kyactf.jpg


13_twxrvc.jpg



Construction PE (KY)
Bridge Rehab, Coatings, Structural Repair
 
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Here is a view of the garage entrance that was mentioned above.

garage_emnhys.jpg


Construction PE (KY)
Bridge Rehab, Coatings, Structural Repair
 
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1_qucmzp.jpg
[pre][/pre]It looks like a pseudo pan joist system formed with insulation. I am not familiar with that technique. It looks cast-in-place. I cannot tell if the reinforcing is PT or conventional.
 
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Very odd for a 40 year old building to fail in a catastrophic way like that. Be interesting to see what the cause may be.

I can't see a re-roof causing this. From the video it looks like failure initiated at the base. It would take an awful lot of materials to add enough load to a column to fail it.

Being so close to the Atlantic it could be some sort of long term corrosion.

Or something nefarious in the parking garage.
 
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