the effect of siesmic shaking on the supports of skyscrapers

[erikws]

I am doing a science fair project on the effect of siesmic shaking on the supports of skyscrapers. I heard that skyscrapers nowadays have mechanisms underneath that make them sway during an earthquake. In my project, I was hoping of building miniature models of these mechanisms but I would be greatful if you could tell me what these mechanisms are called so I can continue my reasearch. I searched everywhere but I just can't seem to find it.

[deleted-71827]

Hi!
I found some great websites that explain, as well as help you to visualize what to build for your model. Refer to the section, "Where to build" in the following link (about halfway down the page)
http://www.nasa.gov/worldbook/earthquake_worldbook.html
Skyscrapers must be firmly anchored to the ground in order to resist earthquakes. Some skyscrapers actually use large steel blocks on their top floors in order to minimize the swaying as well during an earthquake (and wind loading during severe storms) since it adds more weight to provide stability and balance. Here are some additional links:
http://www.allaboutskyscrapers.com/skys ... uction.htm
http://www.propertycommunity.com/emergi ... raper.html --> this talks about the design of Taipei 101, an earthquake-resistant skyscraper, the tallest in the world!
Hope this helps, and best of luck!