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An Analytical Study on the Shape Development of U-shaped Steel Damper for Seismic Isolation System  

Quan, Chun-Ri (동경대학교 공학계 연구과 건축학부)
Oh, Sang-Hoon (부산대학교 건축공학과)
Lee, Sang-Ho (부산대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.22, no.1, 2010 , pp. 43-53 More about this Journal
Abstract
Seismic isolation is one of the most widely implemented and accepted seismic protection systems to limit or avoid damages from unforeseeable earthquakes. As an energy absorption device, however, the supplemental lead itself tends to pollute the environment. Consequently, it is predicted that the use of lead would be controlled. Considering the pollution caused by lead, several researchers are interested in the viability of using steel in place of lead. In this study, first, based on the results of a non-linear finite element analysis, the excellent deformation capacity of a very tough steel damper was demonstrated by comparing it with that of the SS400 damper and determining the effects of main parameters (the aspect ratio, thickness, and width) on the deformation capacity. Second, an optimum shape and design equation for a U-shaped damper with an opening based on stress distribution was suggested.
Keywords
seismic isolation system; high toughness steel; U-shaped steel damper; deformation capacity; stress distribution;
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