コイルスプリングと粘弾性ダンパーを用いた建物防振構法

概要

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Vibration isolation systems for buildings using helical spring units and viscoelastic dampers with viscous liquids can reduce vibration and structure borne noise effectively in buildings near traffic facilities. To study the applicability of this system in seismic areas, especially Japan, the safety under strong earthquakes need to be confirmed. First, loading tests were carried out for spring units and dampers which are the elements of the vibration isolation system. The dependency of displacement of spring unit stiffness and the dependency of damping coefficient and stiffness of dampers on frequency were clarified. From these results, a spring model and a four-element model were developed to simulate the performance of the spring and damper units. Shaking table tests were next carried out using a model of an isolated-building. The experimental results were simulated very well by three-dimensional analysis of the developed models. Finally, response analyses were carried out for a real size isolated-building to confirm the behavior under earthquakes. From these results, the stability of the isolation system during strong earthquakes was confirmed, and the reduction of the response in the super structurre were observed.
社団法人日本建築学会の論文
2000-02-28