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감쇠장치가 설치된 구조물의 등가감쇠비 산정

Determination of Equivalent Damping Ratio for Structure equipped with Dampers

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리모델링 연구소 (A Journal of the Seismic Retrofitting & Remodeling Research Center)
단국대학교 리모델링연구소 (Seismic Retrofitting & Remodeling Research Center)
초록

The purpose of this study is to propose the general method for evaluating the equivalent damping ratios of a structure with supplemental response control dampers. We define Lyapunov function of which derivative can be expressed in autoregressive form and evaluate the equivalent damping ratios by using Lyapunov function and its derivative. This Lyapunov function may be called as generalized structural energy. In this study, it is assumed that the response of a structure is stationary random process and control dampers do not affect the modal shapes of a structure, and the structure has proportional damping. Proposed method can be used to get the equivalent damping ratios of a structure with non-linear control dampers such as friction dampers as well as linear control dampers. To show the effectiveness of the proposed method, we evaluate the equivalent damping ratios of a structure with viscous dampers, AMDs, and friction dampers. The equivalent damping ratios from proposed method are compared to those from eigenvalue analysis for linear control dampers, and those from time history analysis for non-linear control dampers, respectively.

저자
  • 민경원(단국대 건축공학과 부교수) | Min, Kyung-Won
  • 이상현(서울대 공학연구소 객원연구원, 공학박사) | Lee, Sang-Hyun
  • 이영철(단국대 건축공학과 석사과정) | Lee, Yeong-Cheol