Comments on: 728 ton pendulum http://blog.longnow.org/2008/06/25/728-ton-pendulum/ The Official Weblog of The Long Now Foundation and Friends Wed, 08 Feb 2012 11:43:00 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Asnperswazin http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-22559 Asnperswazin Sat, 15 Oct 2011 00:45:00 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-22559 How did they even get that big thing up there. How did they even get that big thing up there.

]]> By: BREINS http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-21858 BREINS Fri, 05 Nov 2010 08:41:08 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-21858 Hello Wayne,<br><br>If the building is somehow horizontally displaced to certain extent at its top and released freely to move then it will definitely vibrate. But the displacement is to be applied to the building's structural system. <br><br>Tuned Mass Dampers, TMD, are the suspended system inside the building's structural system. In earthquakes, TMD starts swinging because it simply won't be participating in building's motion due to its own Inertia. Not due to direct application of any external forces.<br><br>Just forcing TMD to swing won't set up whole building in motion as you said mainly because it's just a suspended system; thus no inertial forces would be produced in building's structural system. <br><br>To know further on Earthquake Forces and Building Dynamics you can visit <a href="http://buildingresearch.com.np/services/erd/erd2.php" rel="nofollow">http://buildingresearch.com.np/services/erd/erd2.php</a> Hello Wayne,

If the building is somehow horizontally displaced to certain extent at its top and released freely to move then it will definitely vibrate. But the displacement is to be applied to the building's structural system.

Tuned Mass Dampers, TMD, are the suspended system inside the building's structural system. In earthquakes, TMD starts swinging because it simply won't be participating in building's motion due to its own Inertia. Not due to direct application of any external forces.

Just forcing TMD to swing won't set up whole building in motion as you said mainly because it's just a suspended system; thus no inertial forces would be produced in building's structural system.

To know further on Earthquake Forces and Building Dynamics you can visit http://buildingresearch.com.np/services/erd/erd2.php

]]> By: 728 Ton Pendulum | in-the-news.net http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-12607 728 Ton Pendulum | in-the-news.net Fri, 08 Jan 2010 02:23:39 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-12607 [...] egsnyder This is an awesome idea actualized in a Taipei building. This HUGE pendulum is used as an earthquake damper in a very tall building. blog.longnow.org [...] [...] egsnyder This is an awesome idea actualized in a Taipei building. This HUGE pendulum is used as an earthquake damper in a very tall building. blog.longnow.org [...]

]]> By: cool http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-8467 cool Wed, 28 Oct 2009 02:13:27 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-8467 really seeing this i was amazed.seeing the way the engineers have put their mind into the making of this huge pendulum i got a sense of respect for them as by making this they will save HUMAN LIFE.......................THANK you TO ALL THOSE WHO HAVE BUILD THIS "life saving structure." really seeing this i was amazed.seeing the way the engineers have put their mind into the making of this huge pendulum i got a sense of respect for them as by making this they will save HUMAN LIFE…………………..THANK you TO ALL THOSE WHO HAVE BUILD THIS “life saving structure.”

]]> By: Daily Log August 25, 2008 : Aragon Physics http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-5272 Daily Log August 25, 2008 : Aragon Physics Mon, 25 Aug 2008 16:31:19 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-5272 [...] object can be used to stabilize a skyscraper during an earthquake.  Check out the following link: http://blog.longnow.org/2008/06/25/728-ton-pendulum (period 1 missed this, so ask me to see this tomorrow in period [...] [...] object can be used to stabilize a skyscraper during an earthquake.  Check out the following link: http://blog.longnow.org/2008/06/25/728-ton-pendulum (period 1 missed this, so ask me to see this tomorrow in period [...]

]]> By: What will Those Crazy Structural Engineers Think of Next? « Construction Knowledge http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4859 What will Those Crazy Structural Engineers Think of Next? « Construction Knowledge Sat, 19 Jul 2008 13:52:24 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4859 [...] For whom the bell tolls [Image: Diagram of Taipei 101's earthquake ball via the Long Now Foundation]. [...] [...] For whom the bell tolls [Image: Diagram of Taipei 101's earthquake ball via the Long Now Foundation]. [...]

]]> By: Wayne http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4789 Wayne Sat, 05 Jul 2008 02:13:58 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4789 So, if a couple people started pushing on the ball when there was no earthquake and got it swinging pretty hard, could they bring the building down as if there was an earthquake with no dampener? So, if a couple people started pushing on the ball when there was no earthquake and got it swinging pretty hard, could they bring the building down as if there was an earthquake with no dampener?

]]> By: Mike Adkinson http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4770 Mike Adkinson Wed, 02 Jul 2008 20:02:55 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4770 aren't dampers often used in the base of the buildings? Michael Adkinson aren’t dampers often used in the base of the buildings? Michael Adkinson

]]> By: Ben Koshkin http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4769 Ben Koshkin Wed, 02 Jul 2008 20:00:50 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4769 this would make a magnificent bell. - benjamin koshkin this would make a magnificent bell. – benjamin koshkin

]]> By: John http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4760 John Mon, 30 Jun 2008 18:19:24 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4760 Why not? If you're that high up the tower to start with the odds of you making it out alive if the ball fails are pretty slim. Might as well stay and watch the ball swing. Why not? If you’re that high up the tower to start with the odds of you making it out alive if the ball fails are pretty slim. Might as well stay and watch the ball swing.

]]> By: Sebastian http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4758 Sebastian Mon, 30 Jun 2008 08:52:52 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4758 You have to love China, "Holy crap we're having an earthquake. We better go and film how the mass damper is reacting to this!" You have to love China, “Holy crap we’re having an earthquake. We better go and film how the mass damper is reacting to this!”

]]> By: Hono Lulu http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4755 Hono Lulu Sat, 28 Jun 2008 06:36:29 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4755 Yeah, i've seen that before on some other blog. it's really amazing. wait... i found the link: http://deputy-dog.com/2008/06/22/in-action-a-skyscrapers-amazing-728-ton-stabilising-ball/ Yeah, i’ve seen that before on some other blog. it’s really amazing. wait… i found the link:

http://deputy-dog.com/2008/06/22/in-action-a-skyscrapers-amazing-728-ton-stabilising-ball/

]]> By: Jim http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4753 Jim Fri, 27 Jun 2008 21:42:28 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4753 "it pretty much does what you do with your own weight when you are standing on a stool changing that light bulb and it starts to sway." If you're up that high, stop standing on a stool and get a ladder. “it pretty much does what you do with your own weight when you are standing on a stool changing that light bulb and it starts to sway.”

If you’re up that high, stop standing on a stool and get a ladder.

]]> By: Gigi http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4750 Gigi Fri, 27 Jun 2008 17:39:28 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4750 Intriguing. Very well done article, highly informative. The video could be better, but it's amazing as it is. Does the Sears tower in Chicago have a pendulum? My aunt worked there years ago, she said she could often feel the building swaying. Intriguing. Very well done article, highly informative. The video could be better, but it’s amazing as it is. Does the Sears tower in Chicago have a pendulum? My aunt worked there years ago, she said she could often feel the building swaying.

]]> By: paresh http://blog.longnow.org/2008/06/25/728-ton-pendulum/comment-page-1/#comment-4747 paresh Fri, 27 Jun 2008 13:15:35 +0000 http://blog.longnow.org/2008/06/25/728-ton-pendulum/#comment-4747 nice post, it is very issential to fight natural impacts. nice post, it is very issential to fight natural impacts.

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