Earthquake protector

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Earthquake protector is a type of base isolation intended for protection of building and non-building structures against potentially damaging lateral impact of strong earthquakes [1].

18-story model on earthquake protectors: shake-table test at UCSD outdoor facility.

Heavy damping mechanism sometimes incorporated in vibration control technologies and, particularly, in base isolation devices, may be considered a valuable source of suppressing vibrations thus enhancing a building's seismic performance. However, for the very pliant systems such as base isolated structures, with a relatively low bearing stiffness but with an high damping, the so-called "damping force" may turn out the main pushing force at a strong earthquake [2]. This finding created a theoretical ground in earthquake engineering for a damping-disengaged base isolation technology called Earthquake protector [3].

Earthquake protector: shake-table demo.

A shake-table video of concurrent shake-table experiments with two identical and kinematically equivalent to their 12-story prototype building models is presented at [4]. The right model is resting on Earthquake Protectors, while the left one, caught at the time of its crash, is fixed to the shake-table platen.

Analytical software[edit]

Analytical software called EPET or Earthquake Performance Evaluation Tool enables concurrent virtual experiments on the same building models with any sliding type of base isolation, including Earthquake protector, and without.

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See also[edit]

References[edit]

  1. Valentin Shustov (2010), "Testing of a New Line of Seismic Base Isolators," https://nees.org/resources/770
  2. Base Isolation: Promise, Design & Performance
  3. SGER: Testing of a New Line of Seismic Base Isolators
  4. Earthquake Protector: Shake Table Crash Testing