DOI QR코드

DOI QR Code

Design of sliding-type base isolators by the concept of equivalent damping

  • Yang, Yeong-Bin (Department of Civil Engineering, National Taiwan University) ;
  • Chen, Yi-Chang (Department of Civil Engineering, National Taiwan University)
  • 발행 : 1999.09.25

초록

One problem with base isolators of the sliding type is that their dynamic responses are nonlinear, which cannot be solved in an easy manner, as distinction must be made between the sliding and non-sliding phases. The lack of a simple method for analyzing structures installed with base isolators is one of the obstacles encountered in application of these devices. As an initial effort toward simplification of the analysis procedure for base-isolated structures, an approach will be proposed in this paper for computing the equivalent damping for the resilient-friction base isolators (R-FBI), based on the condition that the sum of the least squares of errors of the linearized response with reference to the original nonlinear one is a minimum. With the aid of equivalent damping, the original nonlinear system can be replaced by a linear one, which can then be solved by methods readily available. In this paper, equivalent damping curves are established for all ranges of the parameters that characterize the R-FBI for some design spectra.

키워드

참고문헌

  1. Chen, Y.C. (1997), "Analysis of base-isolated systems with sliding surfaces by equivalent linearization" , Master's thesis, Department of Civil Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
  2. Constantinou, M.C. and Tadjbakhsh, I.G. (1984), "The optimum design of a base isolation system with frictional elements", Earthquake Engineering and Structural Dynamics, 12, 203-214. https://doi.org/10.1002/eqe.4290120205
  3. Kaul, M.K. (1978), "Spectrum consistent time history generation", Journal of Engineering Mechanics Division, ASCE, 104(EM4), 781-788.
  4. Mostaghel, N. and Khodaverdian, M. (1987), "Dynamics of resilient-friction base isolator (R-FBI)", Earthquake Engineering and Structural Dynamics, 15, 379-390. https://doi.org/10.1002/eqe.4290150307
  5. Yang, Y.B., Lee, T.Y. and Tsai, I.C. (1990), "Response of multi degree of freedom structures with sliding supports", Earthquake Engineering and Structural Dynamics, 19, 739-752. https://doi.org/10.1002/eqe.4290190509

피인용 문헌

  1. Performance of structure–equipment systems with a novel roll-n-cage isolation bearing vol.87, pp.23-24, 2009, https://doi.org/10.1016/j.compstruc.2009.09.006