EVALUATION OF AMPLIFICATION CHARACTERISTICS AND DYNAMIC PROPERTIES OF SKYSCRAPERS BASED ON STRONG MOTION RECORDS

Abstract

The force-displacement and the damping-displacement relations of skyscrapers were evaluated from the recorded motions in 20 steel and 14 reinforced-concrete buildings during the main large earthquakes (The 2011 off the Pacific coast of Tohoku Earthquake (Mw9.0), The 1995 Southern Hyogo prefecture earthquake (Mw6.9), the South-east off Kii-peninsula earthquake 2004 (Mw7.5)). Regardless of the earthquakes, the regression curves of the relations to the reinforced-concrete buildings were able to express especially on the basis of the bilinear model of the single-degree-of-freedom system. On the other hand, the degree of the relations to the steel buildings was quite lower than the reinforced-concrete buildings.