Experimental and Numerical Analysis of a High-Rise Structure with a Dual FPS Isolation System

Abstract

Given the issues existing in the isolation technology of high-rise structures, this study displays a thorough examination ponder of three control strategies incorporating numerical and experimental investigation on high-rise structures, which include friction pendulum system (FPS) base isolation, the FPS inter-storey isolation, and the FPS dual isolation. Depending on the third-generation benchmark structure, a scaled 9-storey finite element model is designed, and the matching model of FPS is outlined and fabricated, as required by the geometric similarity criteria. Four typical ground motions and four types of peak ground acceleration (PGA) are considered to investigate the dynamic response of three control strategies. The findings demonstrate that the FPS dual isolation technology can viably smother that acceleration of the top layer of the high-rise structure, and the vibration reduction effect of the substructure will be additionally self-evident. For high-rise structures, the FPS dual isolation technology has a significant vibration decrease impact, not just during minor earthquakes but also even during vast earthquakes. The vibration reduction mechanism of FPS dual isolation technology combines tuned mass damper (TMD) and base isolation technology. Those inertial force drives of the superstructure suppress response from claiming substructure, and same time, substructure is the form of base isolation, which extends that structural period segregates the seismic vitality. The structural deformation can be spread between the lower isolation storey and the upper isolation storey, which effectively limits the floor displacement of the structure. The FPS dual isolation does not mainly reduce that essential mode response of the system and suppresses the response of the high-order mode, which will be the primary reason behind the tremendous vibration decreased impact of the long-period structure. Eventually, it is demonstrated that the finite element model can simulate the dynamic response of the FPS dual isolation system with acceptable accuracy and is suitable for further parametric analysis and comparison by comparing the numerical analysis with the experimental findings.