Saturday, February 20, 2010

Difference between earthquake resistance building and seismically isolated building

An earthquake resistance building is designed to bear and withstand earthquakes. Because of an earthquakes enormous energy as it reaches a building, damages to structure and personal property can be devastating, such as Haiti in January 12 of 2010. This is not the case when compared to a “seismically isolated building”. The structure does not collapse for a longer period of time, allowing residents to evacuate safely. Had residence in Haiti had more time to evacuate, perhaps the mortality rate would be much less then it was?

A “seismically isolated building” is designed by placing a special device call an isolator or damper to the foundation of the building. This results in the reduction of the earthquakes forces. These devices actually almost stop, or dampen completely, all side to side movement of a building during an earthquake. This stops the building from tearing apart and allows for people a safe passage when evacuating.

Here is the clip for the earthquake resistance building test in Japan.
Building on the left side is the one without earthquake resistance technology and on the right side of the building is the one with earthquake resistant technology. Please note the difference in side side movement of the non protected building compared to the building using earth quake resistant technology. Please turn off the volume because of the Japanese guy speaking on this clip!!






2 comments:

  1. Hey buddy when I worked for TRL structural engineers, one of the engineers worked on a lot of high rise towers. He had done a few in Vancouver so I would say he might now a thing or two about earthquake resistance technology. I know he would be more than happy to answer questions you might have.

    Contact him at jasonmiles@trleng.ca
    Tell him Curt sent ya!

    ReplyDelete
  2. Thanks Curt. I will send him a e-mail.

    ReplyDelete