Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Multi-Parameter Seismic Demand Model for Non-Seismic Designed Reinforced Concrete Pier Walls

비내진 철근콘크리트 벽식 교각의 다변수 지진응답 예측 모델 개발

  • Lee, Gun Chan (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Kim, Ji Hyeon (Track & Civil Infrastructure Division, Korea Railroad Research Institute) ;
  • Jeon, Jong-Su (Department of Civil and Environmental Engineering, Hanyang University)
  • 이건찬 (한양대학교 건설환경공학과) ;
  • 김지현 (한국철도기술연구원 첨단궤도토목본부) ;
  • 전종수 (한양대학교 건설환경공학과)
  • Received : 2025.09.16
  • Accepted : 2025.09.27
  • Published : 2025.11.01
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Abstract

Non-seismic-designed reinforced concrete (RC) pier walls often include lap splices in potential plastic hinge regions. This study develops an analytical model to capture the post-yield load-deformation response of lap-spliced RC pier walls subjected to earthquake loading. The parameters of the model were calibrated using experimental results, and linear regression was conducted to propose predictive equations for these parameters. The accuracy of the model was validated by comparing it to the load-deformation responses of specimens not included in the calibration database. Subsequently, the developed model was applied to probabilistic bridge models supported by RC pier walls. A multi-parameter seismic demand model was constructed, taking into account geometric, material, and structural uncertainties, using Lasso regression. This model achieved R2 values of 0.73 for in-plane loading and 0.75 for out-of-plane loading. The improvements in performance metrics and the results of the sensitivity analysis emphasize the need to develop a multi-parameter seismic demand model to ensure more reliable seismic demand predictions.

Keywords

Acknowledgement

본 연구는 한국철도기술연구원 기본사업(철도교통의 지진재해에 대한 리질리언스 기반 예방 복구지원 기술 개발, PK2502A2)의 연구비 지원으로 수행되었습니다.

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