ABSTRACT
This paper presents a new type base isolation system, i.e., Slide-limited friction base isolation system (S-LF). Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motions is investigated by using Fourier-Galerkin-Newton method with Floquet theory. Dynamic response of S-LF subjected to earthquake ground motions is calculated with a high order precise direct integration method, and the numerical results are presented in maximum acceleration response spectra of superstructure and maximum sliding displacement response spectrum form. By comparison of isolating effects of S-LF, Pure-friction base isolation system (P-F) and Resilient-friction base isolation system (R-FBI), it shows that the isolating property of S-LF is superior to P-F and R-FBI. Finally through analyzing an engineering example, it is observed that the distribution of the maximum shear between floors and absolute acceleration of S-LF to earthquake ground motion are very different from that of traditional structures.
