Structural Monitoring and Maintenance

  • 제10권3호
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  • Pages.243-260
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  • 2023
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  • 2288-6605(pISSN)
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  • 2288-6613(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic fragility analysis of base isolation reinforced concrete structure building considering performance - a case study for Indonesia

  • Faiz Sulthan (Implementation Unit for Building Materials and Structures, Directorate General of Human Settlements, Ministry of Public Works and Housing) ;
  • Matsutaro Seki (Building Research Institute 1 Tatehara)
  • 투고 : 2023.08.17
  • 심사 : 2023.09.23
  • 발행 : 2023.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Indonesia has had seismic codes for earthquake-resistant structures designs since 1970 and has been updated five times to the latest in 2019. In updating the Indonesian seismic codes, seismic hazard maps for design also update, and there are changes to the Peak Ground Acceleration (PGA). Indonesian seismic design uses the concept of building performance levels consisting of Immediate occupancy (IO), Life Safety (LS), and Collapse Prevention (CP). Related to this performance level, cases still found that buildings were damaged more than their performance targets after the earthquake. Based on the above issues, this study aims to analyze the performance of base isolation design on existing target buildings and analyze the seismic fragility for a case study in Indonesia. The target building is a prototype design 8-story medium-rise residential building using the reinforced concrete moment frame structure. Seismic fragility analysis uses Incremental Dynamic Analysis (IDA) with Nonlinear Time History Analysis (NLTHA) and eleven selected ground motions based on soil classification, magnitude, fault distance, and earthquake source mechanism. The comparison result of IDA shows a trend of significant performance improvement, with the same performance level target and risk category, the base isolation structure can be used at 1.46-3.20 times higher PGA than the fixed base structure. Then the fragility analysis results show that the fixed base structure has a safety margin of 30% and a base isolation structure of 62.5% from the PGA design. This result is useful for assessing existing buildings or considering a new building's performance.

키워드

과제정보

Thanks to the Building Research Institute, Ministry of Land Infrastructure and Transport (MLIT), Japan, this study can be carried out thanks to the help where the first author conducted his research.

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