Buckling Behaviors of Tapered Piles

Joon-Kyu Lee; O-Il Kwon; Tae-Seok Jeong; Su-Han Park

doi:10.7843/kgs.2019.35.2.19

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2019 Vol.35, Issue 2 Preview Page Next Page

Research Article

Buckling Behaviors of Tapered Piles 테이퍼 말뚝의 좌굴 거동

28 February 2019. pp. 19-27

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Abstract

본 논문에서는 테이퍼 말뚝의 좌굴 거동을 평가할 수 있는 해석모델을 제안하였다. 말뚝의 변단면과 주면마찰, 지반의 비균질성을 고려하는 지반-말뚝 시스템의 좌굴을 지배하는 미분방정식을 유도하였다. 이 지배방정식을 Runge-Kutta 법을 이용하여 직접 수치 적분하였고, 미분방정식의 고유치인 좌굴하중은 Regula-Falsi 법을 이용하여 산정하였다. 원통형 말뚝에 대한 문헌값과 이 연구의 좌굴하중을 비교하여 연구의 타당성을 검증하였고, 지반-말뚝에 관련된 무차원변수가 좌굴하중, 좌굴모드, 좌굴응력에 미치는 영향을 분석하였다.

In this study, an analytical model is proposed to estimate the buckling responses of tapered piles. The governing differential equation of the soil-pile system considering the tapering and side friction of the pile and the soil nonhomogeneity is derived, which is numerically integrated by the Runge-Kutta method and then the eigenvalue of bucking load is determined by Regula-Falsi algorithm. For a cylindrical pile, the results obtained from this study are found to compare well with those reported in literature. Illustrative examples for buckling load and stress as well as buckled shape are provided to investigate the effects of dimensionless parameters related to the soil-pile system.

Keywords

Tapered pile

Side-friction

Buckling load

Buckled shape

Nonhomogeneity

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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 : 35
No :2
Pages :19-27
Received Date : 2018-12-11
Revised Date : 2018-02-21
Accepted Date : 2018-02-21
DOI :https://doi.org/10.7843/kgs.2019.35.2.19

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

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