A steel frame reinforced concrete building completed in 1965 was seismically retrofitted using seismic isolation braces with amplification mechanism. The building was sub [...]

The 2011 off the Pacific coast of Tohoku, Japan, earthquake caused significant damage, not only due to tsunamis but also due to strong motions. The damage to housing may [...]

In Hokkaido and around that, many earthquakes occurred. Just within the past 15 years, a number of earthquakes with a Magnitude of 7 or higher have occurred, such as the [...]

This study was carried out to research seismic design, taking into consideration the local site characteristics. While in previous studies, acceleration response spectra [...]

About 8 months after the October 23rd, 2004, Mid-Niigata Earthquake, the middle reach of the Uono River was flooded in a heavy rain. The flood-ravaged zone was immediatel [...]

Dwellings collapsed and water, gas and electricity supplies were cut by a powerful earthquake of M=6.7 on July 17th, 2007, which also caused a small radiation leak and fi [...]

Site amplification factors at subsurface layers are often used as one of the parameters for estimation of strong ground motion. The site amplification factors influence s [...]

The October 23rd, 2004, Mid Niigata prefecture earthquake attacked the Chuetsu area in central Japan, causing serious damage to major traffic arteries located in a mounta [...]