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Figure 4. a) Pendulum-spring base isolation: pivoted upright-pendulum encapsulated by a steel coil
spring acting in shear. b) Scaled sketch of novel sliding element without continuous energy dissipation.
Three levers in contact with the upper sliding plate by roller bearings. Note the bolt connection to the
lower sliding plate moving axially in a slit of the lever. c) Plan view of base isolated building with al-
ternative arrangements of three TLCGD. Eight novel sliding elements are indicated by circle. (Adapted
from Khalid (2010)).
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