Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Seismic Response on Thin Shell as Structural Foundation

기초구조물로서 얇은 쉘 구조물의 지진응답

  • Yee Hooi Min (Faculty of Civil Engineering, UniversitiTeknologi MARA) ;
  • Azizah Abdul Nassir (Faculty of Civil Engineering, UniversitiTeknologi MARA) ;
  • Kim Jae Yeol (Hyupsung university)
  • 이휘민 ;
  • 아지자 압둘 나살 ;
  • 김재열 (협성대학교 건축공학과)
  • Received : 2024.02.06
  • Accepted : 2024.06.05
  • Published : 2024.06.15
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Abstract

This study aims to investigate the seismic response of a large span thin shell structures and assess their displacement under seismic loads. The study employs finite element analysis to model a thin shell structure subjected to seismic excitation. The analysis includes eigenvalue analysis and time history analysis to evaluate the natural frequencies and displacement response of the structure under seismic loads. The findings show that the seismic response of the large span thin shell structure is highly dependent on the frequency content of the seismic excitation. The eigenvalue analysis reveals that the tenth mode of vibration of the structure corresponds to a large-span mode. The time history analysis further demonstrates, with 5% damping, that the displacement response of the structure at the critical node number 4920 increases with increasing seismic intensity, reaching a maximum displacement of 49.87mm at 3.615 seconds. Nevertheless, the maximum displacement is well below the allowable limit of the thin shell. The results of this study provide insight into the behaviour of complex large span thin shell structures as elevated foundations for buildings under seismic excitation, based on the displacement contours on different modes of eigenvalues. The findings suggest that the displacement response of the structure is significant for this new application of thin shell, and it is recommended to enhance the critical displacement area in the next design phase to align with the findings of this study to resist the seismic impact.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(RS-2024-00339490).

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