The isolated building is sliding to the end of travel at the end of the video, so it becomes vulnerable to collapse. Great in a controlled lab, where you have a sine wave, and you start off with a centered building, and with known limits as to how far your table will travel.
Second, in the real world, when the rolling waves hit, your base will slide against its stops with every rolling motion, causing massive impact damage as it hits the limits of travel.
1. The maximum displacement of building is calculated as per response spectra and isolators are designed to accommodate that into design.
2. Isolators are supplemented with dampers which reduces the max displacements.
3. Seismic isolation concept is not just for labs, it is being implemented everywhere in world, Japan being the country implementing this max. After 1994 Kobe Earthquake, 40 percent of new buildings in Japan is base isolated.
.. have you ever heard about safety coefficients???
thematrixboy82 2 years ago
The isolated building is sliding to the end of travel at the end of the video, so it becomes vulnerable to collapse. Great in a controlled lab, where you have a sine wave, and you start off with a centered building, and with known limits as to how far your table will travel.
Second, in the real world, when the rolling waves hit, your base will slide against its stops with every rolling motion, causing massive impact damage as it hits the limits of travel.
light4darkness 3 years ago
@light4darkness
To answer your confusions:
1. The maximum displacement of building is calculated as per response spectra and isolators are designed to accommodate that into design.
2. Isolators are supplemented with dampers which reduces the max displacements.
3. Seismic isolation concept is not just for labs, it is being implemented everywhere in world, Japan being the country implementing this max. After 1994 Kobe Earthquake, 40 percent of new buildings in Japan is base isolated.
maksins 1 year ago