Performance of Seismic Isolated Buildings Due to 2005 West off Fukuoka Earthquake in Japan

Abstract eng:
Offshore in the sea of Genkai, west of Fukuoka Prefecture, the earthquake of magnitude 7.0 on the Richter scale occurred around 10:53 on March 20th, 2005. A seismic intensity VI (JMA) was observed partially of Fukuoka City and Saga Prefecture due to this earthquake. Damage occurred in a lot of houses on the Genkai Island near the epicenter, and the damage of cracking of the building, and the crack of the glass, etc. occurred also in the Fukuoka urban area. After the earthquake generated this area in 1898, 107 years ago, there is no occurrence of an earthquake, and Fukuoka was called a city where an earthquake does not occur. But in Japan there is no area which an earthquake does not occur. Japanese long history is marked by disastrous earthquakes. Seismic Isolation System has the ability to mitigate against earthquakes. From the many recent earthquakes in Japan, people have become aware of the benefits of the Seismic Isolation System. 13 seismic isolated buildings have built in the Fukuoka city. Remarkable performance has been shown during this earthquake. It is confirmed that positive behaviors were shown by seismograph records also in the seismic isolated building located near the fault. In this paper presents the response behavior of the Seismic Isolated buildings due to the earthquake.

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