123 Effect of response reduction of base-isolated structure by variable hydraulic damper

Abstract

Semi-active control using a variable damper stabilizes building responses in an earthquake better than the conventional passive control. This paper used variable hydraulic damper. The servo valve of variable hydraulic damper controls the oil flow between two rooms of the cylinder divided by the piston. As the first step of the research, in order to evaluate the performance expected from the theoretical study, a dynamic loading test was conducted. Next, authors conducted experiment by the base-isolated specimen of two-degree-of-freedom structure. Finally, the damping performance and control characteristics of variable hydraulic damper were verified.