General > General Technical Chat

Structure collapse in an Israeli synagogue - work of resonance?

(1/2) > >>

Bud:
Looks like hundreds of people moving in unison may have created  favorable conditions for a resonance so the structure self-destructed?

Warning: graphics content
Scroll to 1:00

https://www.cnn.com/2021/05/16/middleeast/israel-bleacher-collapse/index.html

AntiProtonBoy:
I'm betting the structure was not properly rated to for the load. If there was resonance, I'd expect the whole structure sway, but I couldn't see anything like that.

AlbertL:
Might have been incorrect assembly; perhaps some bracing omitted?  The loading doesn't seem beyond what I'd expect bleachers to be designed for.

Stray Electron:

--- Quote from: AntiProtonBoy on May 17, 2021, 04:44:33 am ---I'm betting the structure was not properly rated to for the load. If there was resonance, I'd expect the whole structure sway, but I couldn't see anything like that.

--- End quote ---

  I watched the video over and over but I couldn't see any sign of the bleachers swaying but the entire crowd on it was swaying and it was so crowded that I couldn't see the bleachers themselves. I think that, based on the pictures alone, it's impossible to tell of the bleachers were swaying or not.

Gribo:
The builders used metal wire to attach the beams to each other, no screws, no nails, no brains either. Inspectors warned about this structure 2 weeks prior, and were ignored.

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod