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Seismic Isolation in Earthquake -
Resistant Structural Design for Resilient Cities

Figure 1. The use of additional dampers in the seismic isolator system
(Photo: Maurer Söhne)
Although the concept of seismic isolation emerged more than 100 years ago,
important research studies date back to the 1970s: In an experiment conducted
by Eidinger and Kelly (1978) to determine the suitability of rubber isolators for
earthquake protection of structures where full-scale seismic isolator structures
were used; the behavior of structures subject to investigation under the
earthquake records of El Centro 1940, Taft 1950, Parkfield 1966 and Pacoima
Dam 1971, the stability of rubber isolators under major deformation and the
effects of adding large damping to the insulation system were examined and it
was revealed that base overturning moment was reduced by 1/10 compared to
the non-isolator case. First period information about the rules for the design of
buildings, bridges and nuclear power plants with seismic isolators are available
in the article of Blakeley et al. (1979). Experimental performances of lead-core
rubber isolators, initial use of these isolators in a building and three bridges
in New Zealand, and the rules for the design of lead-cores were addressed
by Robinson (1982). The history of seismic isolation covering the period up
to the beginning of the 1990s, the first period applications worldwide and
the behavior of some seismic isolated structures under real earthquakes were
summarized by Buckle and Mayes (1990).
Recent research studies on seismic isolation can be considered as studies
carried out in the last 2 decades: Alhan and Gavin (2004) examined a prototype
building model with seismic isolation with an L-shaped plan as an example in
a study where they evaluated linear and non-linear seismic isolation system
parameters. In a study conducted by Lin (2007), the accuracy of the damping

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