Iterative Perturbation Methods for Isolation Structure Dynamic Model Responses Calculation with Non-classical Damping and Its Correlation Analysis

摘要

In this paper, on the base of considering building base isolation system stiffness distribution characteristics, the iterative perturbation methods for isolation structure dynamic calculation with non-classical damping are established systematically by using the upper and lower structure stiffness ratio as perturbation parameters. Theoretical derivation and examples show that the method can clearly realize effective separation between the super structure and isolation layer damping ratio and coupling among all variables. The calculation process is simple, stable and fast convergence. The calculated results are also accurate. At the same time, this paper also compares the method proposed in this paper with the classical damping method and analyses the influence of basic damping and the super structure damping on isolation structure dynamic response.