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Tuned Mass Damper of Taipei 101

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Re: Tuned Mass Damper of Taipei 101

#51

Earlier quoted context omitted.

Taiwan's weather bureau reports intensity in different regions and was reporting mostly 2 in Taipei (maybe at one point 3? esp. for New Taipei), that's what I'm talking about.

Yeah, so? It was a 6.9, that's what it was.

Not in Taipei, the subject of the article

Re: Tuned Mass Damper of Taipei 101

#53

Earlier quoted context omitted.

It was actually a 6.9 https://earthquake.usgs.gov/earthquakes/eventpage/us7000i90q...

Actually Taipei was only around 2. Magnitudes 6-7 were in the epicenter near Taitung, fairly far away - about 200-300km.

There seems to be a bit of confusion in this thread between differing seismic scales.

The Central Weather Bureau in Taiwan uses an intensity scale where a value of 2 means the event is noticeable by most people and 3 means some of those people are frightened.[0]

For example, here[1] is the recent report for this morning's "5-" event (#137), which I can assure you everybody in the office still felt in Taipei, where it was only a "2". This event also had a magnitude of 5.9 on the ML scale that is used internationally.[2]

[0] https://en.wikipedia.org/wiki/Central_Weather_Bureau_seismic...

[1] https://www.cwb.gov.tw/V8/E/E/EQ/EQ111137-0919-100745.html

[2] https://scweb.cwb.gov.tw/en-us/earthquake/details/EE20220919...

Re: Tuned Mass Damper of Taipei 101

#54
post #43

Earlier quoted context omitted.

Actually Taipei was only around 2. Magnitudes 6-7 were in the epicenter near Taitung, fairly far away - about 200-300km.

I don't think you'd even feel a magnitude 2 quake. Maybe it's different in such a tall building or maybe it was stronger in this area.

I felt it in taipei where it was 2-3. Some stuff in my apartment almost fell (paper bags though)

Re: Tuned Mass Damper of Taipei 101

#56

Earlier quoted context omitted.

Not in Taipei, the subject of the article

Quoted post unavailable.

The recorded magnitude of an earthquake depends on your distance from the epicentre. The farther away you are, the weaker an earthquake feels.

The recording of 6.9 was made hundreds of kilometres away from Taipei. What was felt at Taipei 101 was a much lower magnitude.

Re: Tuned Mass Damper of Taipei 101

#57

Footage of it in motion during today's 6.8 magnitude earthquake: https://www.youtube.com/watch?v=qnSh8C40i1s

It was actually a 6.9 https://earthquake.usgs.gov/earthquakes/eventpage/us7000i90q...

Taiwan uses Richter magnitude, USGS uses Moment magnitude.

6.8 and 6.9 are both right, just different unit.

Re: Tuned Mass Damper of Taipei 101

#58

Footage of it in motion during today's 6.8 magnitude earthquake: https://www.youtube.com/watch?v=qnSh8C40i1s

I can’t say that my first reaction to a major earthquake would be “let’s go up to the 89th floor and see what that 1.5 million pound ball is doing!”

It’s part of the observation deck at the top of Taipei 101, so if you’re already up there when an earthquake hits then “let’s go see what the ball is doing” is really your only option aside from sitting down and praying to the gods of civil engineering.

I’d always been irrationally afraid of going through an earthquake in a skyscraper when I lived in Japan, but then I had this exact experience in Taipei and it more or less cured that particular strain of anxiety.

Re: Tuned Mass Damper of Taipei 101

#59

Earlier quoted context omitted.

Quoted post unavailable.

The Millennium Tower piles do not rest on bedrock, it was supposed to use friction with the soil instead. This is cheaper and CAN work but it is far easier to get wrong than having the piles rest directly on bedrock.

yes thats exactly what I said.

EDIT:

Yo -- when I mentioned Pence and Montana... Iknow several people who owned places in the building, and drank next to Montana in the residents' bar with.... im very familiar with the building

And if you need a very secure location to lock your bike up in SF (which is a good idea) ring the security bell in the parking breezeway near the dumpster, the security guard will open the door - the lock your thing to the stand they have

(LPT: anytime youre in SF rather than use a bike rack outside (people steal your saddles)... drop$5 to check your bike in with a bellhop at a nice hotel.... and they will accomodate you for a week..

Re: Tuned Mass Damper of Taipei 101

#60
post #43

Earlier quoted context omitted.

Actually Taipei was only around 2. Magnitudes 6-7 were in the epicenter near Taitung, fairly far away - about 200-300km.

I don't think you'd even feel a magnitude 2 quake. Maybe it's different in such a tall building or maybe it was stronger in this area.

There was 2 quakes measured in taipei. The first one was 2, I didn’t feel it, was awake as it occured in the middle of the night and I was taking care of new born. The second was a 3 which I felt! Wife was scared, 4yo daughter didn’t notice it on the bed watching tv.
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