Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Dynamic Response Characteristics of Isolation Layer and Superstructure Considering Long-period Ground Motions

장주기 지진동을 고려한 면진층과 상부구조물의 동적응답특성

  • Kim, Ju-Chan (Seismic Research and Test Center, Pusan National University) ;
  • Oh, Sang-Hoon (Dept. of Architectural Engineering, Pusan National University)
  • Received : 2023.04.24
  • Accepted : 2023.06.05
  • Published : 2023.06.30
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Abstract

Seismically isolated structures employ a structural system that incorporates an isolation layer within the building, effectively isolating the superstructure from ground motions. Typically positioned at the building's foundation, this isolation layer lengthens the structure's natural period, thereby reducing the acceleration response of the superstructure. However, concerns arise in seismically isolated structures regarding the potential for significant displacement of the isolation layer due to long-period ground motion. Furthermore, the amplification of the long-period component of ground motion by the isolation layer poses a risk of earthquake damage to both the superstructure and the non-structural components attached to it. Consequently, this study aims to examine the dynamic response characteristics of both the isolation layer and the superstructure through nonlinear time history analysis, taking into account the influence of long-period ground motions. The analysis model utilized in this study follows the energy-based seismic design method proposed by Akiyama (1985). The key variables considered in the analysis include the natural period of the isolation layer, the natural period of the superstructure, and the horizontal yield strength of the superstructure.

Keywords

Acknowledgement

이 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(2022R1A2C2007001).

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