510 耐震システム用コロイダルダンパーに関する実験的研究

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This work presents an experimental study of a colloidal damper for anti-seismic systems. Concretely, a test rig reproducing at reduced scale a building structure seismically isolated was designed and manufactured. Such vertical structure was placed on the table of a roller guide-way that allowed sinusoidal excitation of the structure in horizontal direction, in the frequency range of 1-20 Hz, by using a low-power shaker. During the performed dynamical tests the seismic isolation was achieved by using three different types of absorbers: oil damper, air damper and colloidal damper. These absorbers were placed on the lateral face of the guide-way or directly at the bottom of the structure to attenuate its vibrations excited in horizontal direction. Dynamical performances of these absorbers were compared with the case without seismic isolation. When absorbers were placed on the lateral face of the guide-way, the best seismic isolation was provided by the proposed colloidal damper. However, in the case when absorbers were placed directly at the bottom of the structure, the external force working on the colloidal damper's piston was not large enough to produce the required pressurization level (10MPa) of the tested colloid. In such circumstances, an adjoining building structure, consisted of two towers (A and B) connected by the tested absorber (seismic control device) was redesigned and manufactured. By adjusting the variable mass of the tower B against the fixed mass of the tower A the external force working on the colloidal damper's piston was increased to achieve the required pressurization of the colloid and the optimal tuning of the system.
一般社団法人日本機械学会の論文
2009-08-03

510 耐震システム用コロイダルダンパーに関する実験的研究

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