Numerical Study on the Effect of Steel Pipe Specification on Pile Behaviour

Jeong-Jun Park; Kwang-Wu Lee; Seung-Kyong You; Gigwon Hong

doi:10.7843/kgs.2017.33.5.37

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2017 Vol.33, Issue 5 Preview Page

Numerical Study on the Effect of Steel Pipe Specification on Pile Behaviour 강관말뚝의 제원이 말뚝거동에 미치는 영향에 관한 수치해석 연구

31 May 2017. pp. 37-44

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Abstract

In this study, three dimensional numerical analyses were carried out to predict axial (pullout and compressive) and lateral behavior of rock-socketed steel pipe pile varying diameter, wall thickness, and length. As a result of the pile pullout analyses, it was confirmed that the pullout displacement was inversely proportional to the pile diameter for given pile length, thickness, pullout load. Load-settlement relationship of the compressive pile analyses revealed that the effect of pile thickness on pile resistance was more significant than that of pile diameter. In addition, laterally loaded pile analyses showed that pile lateral resistance is influenced above all else by pile diameter. This study showed that it is necessary to conduct numerical analyses to identify the effects of pile diameter, wall thickness, and pile length on the steel pipe pile behavior as a preliminary pile design under specified loading conditions.

Keywords

Steel pipe pile

Pullout

Compressive load

Laterally load

Resistance effect

Numerical analysis

본 연구에서는 특정 암반에 근입된 강관말뚝의 거동특성을 분석하기 위하여, 강관말뚝의 직경, 두께 및 길이 조건에 따른 인발, 압축 및 수평재하 시의 시험결과 예측을 위한 3차원 수치해석 연구를 수행하였다. 먼저, 인발재하에 대한 거동특성을 분석한 결과, 동일한 말뚝길이 및 두께와 인발하중 크기를 기준으로 말뚝직경에 반비례하는 인발변위가 나타나는 것으로 확인되었다. 또한 압축재하에 따른 하중-침하 관계를 통하여, 말뚝 직경에 비하여 말뚝의 두께가 하중저항에 대한 효과에 더욱 큰 영향을 미치는 것으로 분석되었으며, 수평하중 재하에 따른 수평변위 관계를 바탕으 로 수평하중의 저항효과는 말뚝직경에 의한 영향이 큰 것으로 분석되었다. 따라서 강관말뚝을 이용하여 기초구조물 설계에 따른 재하시험을 위해서는 예비설계 단계에서 말뚝 조건이 거동특성에 미치는 영향을 분석할 필요가 있는 것으로 확인되었다.

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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 : 33
No :5
Pages :37-44
Received Date : 2016-05-17
Accepted Date : 2017-05-24
DOI :https://doi.org/10.7843/kgs.2017.33.5.37

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

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