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Evaluation of Performance of the Teflon-Type Seismic Foundation Isolation System

테프론형 기초지진격리장치의 성능평가

  • Son, Su Won (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Kim, Eung Soo (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Na, Geon Ha (National Disaster Management Research Institute) ;
  • Kim, Jin Man (Department of Civil and Environmental Engineering, Pusan National University)
  • 손수원 (부산대학교 사회환경시스템공학과) ;
  • 김응수 (부산대학교 사회환경시스템공학과) ;
  • 나건하 (국립재난안전연구원) ;
  • 김진만 (부산대학교 사회환경시스템공학과)
  • Received : 2017.02.09
  • Accepted : 2017.04.07
  • Published : 2017.05.01

Abstract

Various seismic isolation methods are being applied to bridges and buildings to improve their seismic performance. Most seismic isolation systems are the structural seismic isolation systems. In this study, the seismic performance of geotechnical seismic isolation system capable of isolating the lower foundation of the bridge structure from ground was evaluated. The geotechnical seismic isolation system was built with teflon, and the model structure was made by adopting the similitude law. The response acceleration for sinusoidal waves of various amplitudes and frequencies and seismic waves were analyzed by performing 1-G shaking table experiments. Fixed foundation, Sliding foundation, and Rocking foundation were evaluated. The results of this study indicated that the Teflon-type seismic foundation isolation system is effective in reducing the acceleration transmitted to the superstructure subject to large input ground motion. Response spectrum of the Rocking and Sliding foundation structures moves to the long period, while that of Fixed foundation moves to short period.

Keywords

Seismic isolation system;Seismic performance;Bridge foundation;1-G shaking table;Sliding foundation;Rocking foundation

Acknowledgement

Supported by : 한국연구재단

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