5 ms·
I visited a couple of DCs in Tokyo, and the tours systematically feature a look at the anti-seismic system. It's actually pretty unimpressive : basically the se
by laurentl 9y ago
I visited a couple of DCs in Tokyo, and the tours systematically feature a look at the anti-seismic system. It's actually pretty unimpressive : basically the seismic-protected part of the building is mounted on big rubber dampers, with some huge pistons thrown in for active attenuation. In taller buildings (I visited a DC with around 20 stories IIRC) the stories are not rigidly connected together, so that instead of swaying (and possibly toppling) during an earthquake, the building just kind of wobbles.
Very effective though, as the video shows. My visits were post-2011, and each DC had a record of the building's movement during the big earthquake; max amplitude on the seismic-protected part was a couple of centimeters, vs 50 cms or more for the rest of the building.
- cryptonector 9y agoUnimpressive?! Well, I am quite impressed.
- laurentl 9y agoJust to clarify: I meant that the equipment itself is unimpressive (mundane would be a better term I guess) but the results are definitely impressive :D
- finid 9y agoVery impressive, actually. More impressive are the guys walking around during all that swaying as if they were on coffee brake.
- walrus01 9y agowhole building isolation/damper system vs no dampening comparison: https://www.youtube.com/watch?v=kzVvd4Dk6sw https://www.youtube.com/watch?v=kzVvd4Dk6sw
- factsaresacred 9y agoThis is another neat demo: https://www.youtube.com/watch?v=xp2pGxFzrzI https://www.youtube.com/watch?v=xp2pGxFzrzI
- sinap 9y ago> In taller buildings (I visited a DC with around 20 stories IIRC) the stories are not rigidly connected together, so that instead of swaying (and possibly toppling) during an earthquake, the building just kind of wobbles. This is the reason why Japanese pagodas have survived for so long. https://youtu.be/0tFWn_e71qc?t=2m45s https://youtu.be/0tFWn_e71qc?t=2m45s
- prewett 9y agoIt's not a DC, but Taipei 101 has a mass damper, and there's a video of it swaying during an earthquake. Really impressive how much that things moves! https://www.youtube.com/watch?v=NYSgd1XSZXc https://www.youtube.com/watch?v=NYSgd1XSZXc
- deleted 9y ago[deleted]