Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Nonlinear Modeling Parameters for Concrete Encased H-Shaped Steel Columns

H형강 매입형 합성기둥 비선형 모델링 파라미터 제안

  • Kim, Seung Hyun ( Department of Architectural Engineering, Hanyang University) ;
  • Yu, Eun Jong ( Department of Architectural Engineering, Hanyang University)
  • 김승현 (한양대학교 건축공학과) ;
  • 유은종 (한양대학교 건축공학과)
  • Received : 2025.03.27
  • Accepted : 2025.04.08
  • Published : 2025.07.01
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Abstract

Due to the limited experimental data on the seismic performance of concrete-encased steel columns, standardized guidelines for nonlinear modeling parameters and acceptance criteria have not yet been developed. This study utilized analytical and numerical methods to predict the nonlinear behavior of concrete-encased steel columns with H-shaped steel sections. The findings of this study have direct and practical implications for the design and evaluation of concrete-encased steel columns. For instance, for concrete-encased steel columns constructed with normal-strength concrete and subjected to low-to-moderate axial load ratios, the yield rotation angle can be determined through fiber-based section analysis and analytical equations, and the nonlinear modeling parameter can be evaluated based on section analysis and the proposed empirical equation. For concrete-encased steel columns with high-strength concrete or high axial load ratios, inconsistencies between section analyses and experimental results are observed. Accordingly, the nonlinear modeling parameter a can be evaluated using the proposed empirical equation. The empirical equation was conservatively developed based on the modeling parameter criteria for reinforced concrete columns in ASCE 41-13.

Keywords

Acknowledgement

본 논문은 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음 (과제번호 : RS-2021-KA163162).

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