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Tuned Mass Damper of Taipei 101

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Re: Tuned Mass Damper of Taipei 101

#81

Post by dwringer »

samstave wrote: post #27
chiph wrote: post #6

The shape/design was copied by the Westworld designers for the quantum supercomputer "Rehoboam" in season 3. https://www.youtube.com/watch?v=TgBtBkW0u8Y Also - given the large motion of the damper in today's earthquake, why weren't more people freaking out? I'm also curious about how much the dampers (shock absorbers) heated up from restraining the movement of the ball.

This engineering idea/concept/design is WAY older than "westworld" Look at japanese engineering that implemented the same concept for their castles... WAY THE HECK earlier...

Although it's in passive voice and thus not always taught or preferred, " was copied by " means that came first, not .

Re: Tuned Mass Damper of Taipei 101

#82

Post by toast0 »

phkahler wrote: post #77

>> As one of the tallest structures in the world, located only 660 feet from a major fault line... I don't care what kind of fancy mass damper you've got, this just seems like a bad idea. The same building would be safer somewhere else. Why do humans insist of trying to defy nature?

It's better to knowingly build next to a major fault line than to build next to a major fault line discovered after you built.

There's also the issue that tallest structures really need to be placed in areas of extreme density in order to attract the usage they need to be economically viable. Our ancestors didn't tend to plan cities around suitable geography for buildings these tall, but we'd have trouble convincing people to move to a planned city with better geography.

Re: Tuned Mass Damper of Taipei 101

#83

Post by max51 »

strainer wrote: post #66
max51 wrote: post #36

Passive mass dampers are used for wind, not earthquakes. their performance for earthquake is so bad that researchers don't even bother studying it. If you use google scholars, the only results you get are researchers mentioning in their intro that passive systems don't work for seismic and then they propose an active (ei. with motors, pumps, etc.) system or a semi-active system (ef. fluid dampers with electronically…

How about the mass dampers in thousand year old Japanese pagoda architecture ? https://www.electronicsweekly.com/blogs/engineer-in-wonderla...

same thing, they take too long to start working. without active sensors/valves, they are useless for seismic and no one yet has been whiling to take the risk on active system. I'm sure we'll see them eventually, it's just not worth the risk for now.

Re: Tuned Mass Damper of Taipei 101

#84

Post by strainer »

max51 wrote: post #83
strainer wrote: post #66

Earlier quoted context omitted.

How about the mass dampers in thousand year old Japanese pagoda architecture ? https://www.electronicsweekly.com/blogs/engineer-in-wonderla...

same thing, they take too long to start working. without active sensors/valves, they are useless for seismic and no one yet has been whiling to take the risk on active system. I'm sure we'll see them eventually, it's just not worth the risk for now.

In the article I linked, a paper is discussed "‘Earthquake response of ancient five-story pagoda structure of Horyu-Ji temple in Japan‘"

Re: Tuned Mass Damper of Taipei 101

#85

Post by samstave »

samstave wrote: post #59
HyperSane wrote: post #33

Earlier quoted context omitted.

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 doo…

so fn funny ; people downvote this, LPT - but YSK bikes these days are in the $15,000 range...

Mine is $8k and its the low med range of bike...

So seriously - if you are spending on your kicks like that, make friends with a bellhop so you dont go through the agony of having a bike stolen from you.

If youre in the bay area... MikesBikes is your friend

Re: Tuned Mass Damper of Taipei 101

#86

Post by Taniwha »

graderjs wrote: post #40
bhrgunatha wrote: post #32

Earlier quoted context omitted.

Are you misremembering the 6.4 from 2018 in Hualien? There were no 7+ magnitude quakes in recent years. [1] The closest is 2016 at 7.1 which took out some undersea internet cables the caused a reduction in spam worldwide of 50%. [2] [1] https://en.wikipedia.org/wiki/Taiwan_earthquakes [2] https://en.wikipedia.org/wiki/2006_Hengchun_earthquakes

No there was definitely a 7 a few years back, I didn't say it was in Hualien. Do I really need to check this, for your convincing, can't you just believe me? alright I checked: this is weird, but can't remember this one being a 6. Anyway, it was 7 on the Taiwan intensity scale. Maybe that's where I got it from? https://scweb.cwb.gov.tw/en-us/earthquake/details/EE20190418... https://en.wikipedia.org/wiki/2019_Hualien_…

Remember that Taiwan and the USGS report on different scales

Re: Tuned Mass Damper of Taipei 101

#87

Post by HyperSane »

samstave wrote: post #85
samstave wrote: post #59

Earlier quoted context omitted.

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 doo…

so fn funny ; people downvote this, LPT - but YSK bikes these days are in the $15,000 range... Mine is $8k and its the low med range of bike... So seriously - if you are spending on your kicks like that, make friends with a bellhop so you dont go through the agony of having a bike stolen from you. If youre in the bay area... MikesBikes is your friend

Sir, this is a Wendy's

Re: Tuned Mass Damper of Taipei 101

#88

Post by ungamedplayer »

graderjs wrote: post #71
ungamedplayer wrote: post #55

Earlier quoted context omitted.

I know how you feel.

Well you don't know how I feel at all, but thanks for saying that as I think you were either: joking a little bit (a play on words, as in: "You don't know how I feel, please...", "I know how you feel" sympathetic , so it's kind of funny), or also showing support, because you can relate to people being fake and trying to tell you what you can and can't feel, which is total bullshit. When of course nobody else can tell…

It was the first.

But, today i learned I can abuse someone by telling them how they feel.. New worlds of opportunity have opened up.

Re: Tuned Mass Damper of Taipei 101

#89

Post by max51 »

strainer wrote: post #84
max51 wrote: post #83

Earlier quoted context omitted.

same thing, they take too long to start working. without active sensors/valves, they are useless for seismic and no one yet has been whiling to take the risk on active system. I'm sure we'll see them eventually, it's just not worth the risk for now.

In the article I linked, a paper is discussed "‘Earthquake response of ancient five-story pagoda structure of Horyu-Ji temple in Japan‘"

They vaguely list it as a contribution but they have nothing to back it up.

On the other hand, you have scientists who ran computer simulations and shaking table experiments proving that passive damper do almost nothing during a seismic event.

As I said before, the reason they rarely get mentioned by actual engineers/scientist in this domain who can back up their claims is that we've known for decades that they are literally useless for seismic. We're at the point where you don't even need to quote sources on your peer-reviewed article to say in your intro that they don't work for this use case.

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