ピエゾアクチュエータを用いた摩擦力制御形アクティブ・ブレースによる構造物の振動制御に関する基礎的研究

概要

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Active/passive mass dampers for buildings are mainly used to improve habitability or human comfort in the buildings in the event of strong winds, and energy dissipation devices are mainly used to enhance the safety of the buildings in the event of strong earthquakes. However very few systems are useful for both of these purposes. As a system which can serve both purposes, an active brace system was proposed, which is installed in stories of a building and can vary the friction force acting between the upper and lower floors of the story using piezoelectric actuators. Thus the active brace works as a friction controllable damper or a variable stiffness system for semiactive response control of the building. Excitation tests were carried out for a single-story building model with a mass of 1 150 kg supported by 4 columns. The active brace model equipped with two piezoelectric actuators produced a friction force of up to 2.5 kN. Through the test, it was shown that the response control by the active brace exhibited good performance throughout a wide range of excitation intensity.
1997-10-25