Abstract
A new fail-safe braking device has been developed to protect seismically-isolated structures against ground motions caused by mega earthquakes. The purpose of the device is avoiding collision between superstructure and retaining wall in base isolation layer, and keeping superstructure within a minimum damage. A full-scale prototype fail-safe braking device was fabricated, and loading tests were carried out. Expected performance was exhibited in the test. Seismic response analysis was also conducted to confirm the effectiveness of the device.
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