Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Evaluation on compressive strength of steel-concrete composite piles using a large scaled UTM(Universal Test Machine)

대형 UTM을 이용한 강관합성 말뚝재료의 강도 특성 평가

  • Lee, Ju-Hyung (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kwon, Hyung-Min (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Jae-Hyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kwak, Ki-Seok (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Chung, Moon-Kyung (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 이주형 (한국건설기술연구원 지반연구실) ;
  • 권형민 (한국건설기술연구원 지반연구실) ;
  • 박재현 (한국건설기술연구원 지반연구실) ;
  • 곽기석 (한국건설기술연구원 지반연구실) ;
  • 정문경 (한국건설기술연구원 지반연구실)
  • Published : 2009.03.27
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Abstract

Various model piles with different sections such as reinforced concrete, steel, steel-concrete composite without rebar and steel-concrete composite with rebar were made, and vertical load test was conducted using a large scaled UTM(Universal Test Machine) to evaluate Young's modulus and ultimate load of the model piles. Based on the tests, ultimate load of steel-concrete composite pile is 31% greater than the sum of it of reinforced concrete pile and it of steel pile. This is caused that ultimate load and Young's modulus of inner concrete increase due to confining effect by outer steel casing. Variation of ultimate load is also insignificant depending on the ratio of length to diameter(L/D), therefore bucking has not an effect on change of ultimate load in case of the L/D below 10.

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