At midnight in Japan on Tuesday, July 14, one of the worst earthquakes in human history took place in Miki City.
But the massive quake — which measured a 7.5 on the Richter scale — only struck one building, a seven-story wooden structure exposed to a simulated earthquake inside a Japanese laboratory. Happily for the U.S. engineers who designed the building, it did not fall down.
The full-scale building sat on a metal shake table that rocked it violently back and forth.
The table, designed to hold up to 2.5 million pounds, reproduced forces based on those recorded at a 1994 earthquake at Northridge, Calif., but scaled up by 180 percent to simulate an earthquake so violent it would only occur on average once every 2,500 years.
Monday 20 July 2009
Huge Earthquake Strikes Single Building in 'Shake Test' - Science News | Science & Technology | Technology News - FOXNews.com
