Seismic Base Isolation Analysis for the Control of Structural Nonlinear Vibration
نویسندگان
چکیده
In this paper, structural nonlinear vibration control using base isolation system is studied. A nonlinear structure model with base isolation devices is developed to analyze the control effect of base isolated structure. A bi-linear hysteresis model is incorporated into the structure to mimic nonlinear behaviors. Simulation is made on this nonlinear structure with base isolation system. It can be concluded from the simulation that for nonlinear structure with base isolation if linear structural parameters are used to calculate the related control parameters, the control effect may be worse than the case without control. Therefore, in order to design the based isolation device for nonlinear structure, nonlinear response is recommended to calculate the related control parameters. Moreover, an active control method based on the negative stiffness idea is proposed to control the nonlinear base isolated structure, which is verified by the simulation.
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