Papers Published

  1. Gavin, Henri and Thurston, Julie and Minowa, Chicahiro and Fujitani, Hideo, Effects of damper force ranges and ground motion pulse periods on the performance of semi-active isolation systems, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 454 (2003), pp. 79 - 85 .
    (last updated on 2007/04/09)

    Abstract:
    A large-scale base-isolated steel structural frame was tested at the shaking table laboratory of the National Research Institute for Earth Sciences and Disaster Prevention. These collaborative experiments featured auto-adaptive media and devices to enhance the performance of passive base isolation systems. The planning of these experiments involved determining appropriate device control methods, the development of a controllable damping device with fail-safe characteristics, and the evaluation of the performance of the controlled isolation system subjected to strong ground motion with pronounced near-field effects. The results of the planning study and their large-scale experimental confirmation provide guidelines for the development and implementation of auto-adaptive damping devices for full scale structures.

    Keywords:
    Control systems;Steel structures;Mathematical models;Computer simulation;