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2025 Vol.15, Issue 2

Scientific Paper

Seismic analysis evaluation of IER-Type retaining walls under road embankment conditions considering Korea’s maximum credible earthquake

국내 발생 최대지진을 고려한 도로 성토 조건에서의 IER 지주식 흙막이 내진해석 평가

ITae Oh1
,
Minsu Seo2
,
SuWon Son3*
오 이태1
,
서 민수2
,
손 수원3*
1Ph.D. Candidate, Dept. of Civil Eng. Kyungnam University
2Research Prof., Dept. of Civil Eng. Dong-Eui University (Ph.D.)
3Assistant Prof., Dept. of Architectural and Civil Eng. Kyungil University (Ph.D.)
1경남대학교 재난안전건설학과 박사수료
2동의대학교 토목공학과 연구교수(박사)
3경일대학교 건축토목공학과 조교수(박사)
*Corresponding Author
31 December 2025. pp. 207-224
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Abstract

This study investigates the seismic stability of retaining systems used in embankment construction, with a particular focus on a comparative evaluation of the Inclined Earth Retaining (IER) method and conventional H-pile retaining walls. Numerical analyses were performed using FLAC2D, incorporating nonlinear soil behavior and interface elements to realistically simulate soil-structure interaction. Ground motion records from the 2016 Gyeongju earthquake were applied to evaluate dynamic responses under embankment heights of 3 m, 5 m, and 7 m. The analysis results show that although the IER system exhibited relatively higher amplification ratios of internal forces under seismic loading, it consistently resulted in the smallest absolute lateral displacements and internal force demands across all analyzed conditions. In contrast, the H-pile retaining system demonstrated significant structural stress responses, even when the pile spacing was reduced. These findings indicate that the IER method provides superior seismic performance and structural efficiency, particularly under higher embankment conditions. The results of this study offer practical insights for the selection and seismic design of retaining wall systems in earthwork engineering.

Keywords
Inclined earth retaining (IER)
Seismic analysis
Road embankment
Residual displacement
Internal force
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Information
  • Publisher :KOREAN ASPHALT INSTITUTE
  • Publisher(Ko) :한국아스팔트학회
  • Journal Title :Journal of the Korean Asphalt Institute
  • Journal Title(Ko) :한국아스팔트학회지
  • Volume : 15
  • No :2
  • Pages :207-224
  • Received Date : 2025-12-01
  • Revised Date : 2025-12-05
  • Accepted Date : 2025-12-05
  • DOI :https://doi.org/10.22702/jkai.2025.15.2.16
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