改良型摩擦ダンパーと積層ゴム支承との組合せ方式免震構造の設計法

概要

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"Friction Damper" which had been previously developed for the Base Isolation System was improved by connecting a High-Damping type Multi-Rubber in series to the Friction Damper. The advantages of the improvement are; (1) to obtain specified reasonable initial equivalent stiffness expected to cut high frequencies as a filter for from weak to strong ground motions. (2) to add function consuming hysteresis energy even for small or moderate earthquakes. Then a dynamic verification test was conducted. The hysteresis curves obtained from the test matched exactly with the designed ones. As a result, any objective buildings using the optimum Base Isolation Systems can be designed. A model building was designed. For this building, eight "Improved Friction Dampers" arranged symmetrically and Multi-Rubber Bearings were adopted as the Base Isolation System. The System was examined to obtain a simple hysteresis model for the earthquake response analysis. The earthquake response analysis for our Base Isolation System with eccentricity of mass was carried out. In conclusion, the influence of eccentricity upon the maximum displacement response turned out to be relatively slight, because the maximum torsional response caused by eccentricity and the maximum horizontal response didn't occur at the same time. And the results satisfied the criteria.
一般社団法人日本建築学会の論文
1991-03-15