The isolation system literally "isolates" the structure from the strong earthquake motions and avoids the devastating damage of the structure. One of the early applications of the isolation system is for the South Rangitikei railway viaduct in New Zealand, and it has been widely adopted to Japanese railways, roads and buildings since the 1995 Hyogo-ken Nanbu earthquake. In this report, the fundamental features of the isolation systems and design issues are introduced.
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