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2025 Vol.26, Issue 11 Preview Page
Influence of Grain Size Distribution on the Dynamic Behavior of Pile Groups under Seismic Loading in Sandy Soils

지진하중을 받는 무리말뚝의 동적거동에 사질토의 입도분포가 미치는 영향

Kwangheui Park1
,
Kwangkuk Ahn2*
박 광희1
,
안 광국2*
1Project Manager, HJ shipbuilding & construction
2Professor, School of Civil Engineering, Chungbuk National University
*Corresponding Author
1 November 2025. pp. 19-26
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Abstract

Dynamic p–y curves, which are used to predict the dynamic behavior of piles, have mainly focused on the frequency characteristics of seismic waves and the relative density of soils. However, limited research has considered the influence of particle size and distribution, which are key factors affecting the dynamic properties of soils. In this study, 1g shaking table tests were performed on pile groups installed in sandy grounds with varying grain size distributions to examine their effect on the dynamic behavior of pile groups subjected to seismic loading. The results demonstrated that relative density and grain size distribution parameters, namely the uniformity coefficient and effective grain size significantly influence the dynamic p–y curves of the pile groups, as well as their maximum lateral displacement, bending moment and shear force.

Keywords
Grain size distribution
Sany soil
Dynamic p-y curve
Max. bending moment

말뚝의 동적 거동을 예측하기 위해 확인되는 말뚝의 동적 p-y 곡선은 주로 지진파의 주파수 특성 및 지반의 상대밀도에 초점을 두었을 뿐 지반의 동적특성에 영향을 미치는 지반을 구성하는 입자의 크기와 분포를 고려한 연구는 미비하다. 이에 본 연구에서는 지진하중을 받는 무리말뚝의 동적거동에 사질토의 입도분포가 미치는 영향을 확인하기 위해 입도분포가 다른 지반에 설치된 무리말뚝에 대하여 1g 진동모형실험을 수행하였다. 실험 결과 지반의 상대밀도 및 입도분포 특성인 균등계수, 유효입경이 무리말뚝의 동적 p-y 곡선 및 무리말뚝의 최대 수평변위, 휨모멘트, 전단력에 영향을 미치는 것으로 나타났다.

키워드
입도분포
사질토
동적 p-y 곡선
최대 휨모멘트
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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 26
  • No :11
  • Pages :19-26
  • Received Date : 2025-09-22
  • Revised Date : 2025-09-25
  • Accepted Date : 2025-10-19
  • DOI :https://doi.org/10.14481/jkges.2025.26.11.19
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