Investigation of Pile Behaviour according to Interface Properties - Comparison between Pile Model Test Using Close Range Photogrammetry and Numerical Analysis

Jung-Min Lee; Yong-Joo Lee

doi:10.7843/kgs.2014.30.9.29

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2014 Vol.30, Issue 9 Preview Page Next Page

Investigation of Pile Behaviour according to Interface Properties - Comparison between Pile Model Test Using Close Range Photogrammetry and Numerical Analysis 경계면 물성치에 따른 말뚝 거동 분석 - 근거리 사진계측을 이용한 모형시험과 수치해석 비교

30 September 2014. pp. 29-39

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Abstract

In this study, model pile-load test with numerical analysis was carried out to compare and analyze pile behaviour according to interface properties. In the model test, Close Range Photogrammetry (CRP) was chosen to measure the ground deformation. In addition, model steel and concrete piles were used. Based on the model pile test, interface elements around the model pile were used to simulate the slip effect. Interface properties were adopted as interface reduction factor Rinter. Interface reduction factor, Rinter plays a key role in the interface properties. Through this study, it was found that the model ground behaviour measured by CRP corresponded well to the one predicted by the numerical analysis. And, the interface strength reduction factor, Rinter value of the steel pile was higher than that of the concrete pile.

Keywords

Interface properties

Model Pile-Load test

Pile numerical analysis

Interface strength reduction factor Rinter

Close range photogrammetry

본 연구는 지반과 말뚝 사이의 경계면 물성치에 따른 말뚝의 거동을 파악하기 위하여, 말뚝 모형시험 결과와 유한요소해석 결과를 이용하여 비교･분석하였다. 모형시험은 말뚝이 침하함에 따른 주변 지반의 거동을 파악하기 위하여 근거리 사진계측 기법을 적용하였으며, 강재와 콘크리트로 제작 된 각각의 말뚝으로 시험을 수행하였다. 수치해석은 모형시험을 근거로 모델링 하였으며, 지반과 말뚝 사이의 미끄러짐을 모사하기 위하여 경계면 요소를 이용하였다. 또한 경계면 강도감소계수 Rinter를 이용하여 경계면 요소의 물성치를 나타내었으며, 이 값을 바꿔가며 모형시험 결과와 비교하였다. 본 연구를 통해 근거리 사진계측 기법과 수치해석 결과가 어느 정도 잘 일치하는 것을 확인 할 수 있었다. 또한, 말뚝의 재료에 따른 경계면 강도감소계수 Rinter 값이 말뚝 거동에 영향을 주는 것을 확인하였다.

References

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 30
No :9
Pages :29-39
Received Date : 2014-07-11
Revised Date : 2014-09-16
Accepted Date : 2014-09-17
DOI :https://doi.org/10.7843/kgs.2014.30.9.29

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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