Evaluation of Bearing Capacities of Large Size Non-welded Composite Piles by 3-Dimensional Numerical Analysis

doi:2011.25.6.35

J. Ocean Eng. Technol. > Volume 25(6); 2011 > Article

J. Ocean Eng. Technol. 2011;25(6):35-41.
DOI: https://doi.org/10.5574/KSOE.2011.25.6.035

Park Jae-Hyun,Kim Sung-Ryul,Le Chi-Hung,Chung Moon-Kyung

Geotech. Eng'g Research Div. SOC Research Inst. KICT,Dept. of Civil Eng. Dong-A University,Dept. of Civil Eng. Dong-A University,Geotech. Eng'g Research Div. SOC Research Inst. KICT

3차원 수치해석을 이용한 대구경 무용접 복합말뚝의 지지거동 분석

박재현,김성렬,정문경

한국건설기술연구원 SOC 성능연구소 Geo-인프라 연구실,동아대학교 공과대학 토목공학과,동아대학교 공과대학 토목공학과,한국건설기술연구원 SOC 성능연구소 Geo-인프라 연구실

Keywords: Large size PHC pile, Non-welded composite pile, Finite element analysis, Bearing capacity, Pile load test

핵심용어: 대구경 PHC 말뚝, 무용접 복합말뚝, 유한요소해석, 지지력, 말뚝재하실험

Abstract

Recently, as large structures, which should support large design loads have been constructed, the study on the large diameter composite pile becomes necessary. The large diameter composite pile has the diameter over 700mm and consists of two parts of the upper steel pipe pile and the lower PHC pile by a mechanical joint. In this research, to analyze the bearing capacity and the material strength of the composite pile, three dimensional numerical analyses were performed. First, the numerical modeling method was verified by comparing the calculated load-movement curves of the pile with those of the field pile load tests. Then, a total of twelve analyses were performed by varying pile diameter and loading direction for three pile types of PHC, steel pipe and composite piles. The results showed that the vertical and the horizontal load-movement curves of the composite pile were identical with those of the steel pipe pile and the horizontal material strength of the composite pile was 60-80% larger than that of the PHC pile.