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2018 Vol.27, Issue 4 Preview Page
Evaluation of Steel-Pipe Connections in Plastic Greenhouse Using Bending Test

플라스틱 온실의 강관 이음부 휨성능 분석

Man-Kwon Choi1
,
Hee-Ryong Ryu1*
,
Myeong-Whan Cho1
,
In-Ho Yu1
최 만권1
,
류 희룡1*
,
조 명환1
,
유 인호1
1Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration, Haman, 52054, Rep. of Korea
1농촌진흥청·국립원예특작과학원·시설원예연구소
*Corresponding author: baradori@korea.kr
30 November 2018. pp. 391-399
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Abstract

In this paper, experimental study performed on steel-pipe connections for structural members of a greenhouse is presented. By those experiments performed, bending moment, deformation and stress distribution of specimens were investigated under four point bending test. The bending performance according to connection method using pin and the stretching is also investigated. The results of bending performance of the no connection specimen were compared to those of other connection specimens. The pin and stretching connection specimens showed lower banding performance than the no connection specimen. The stretching connection method was relatively higher bending performance than the pin connection specimens. According to the results, we proposed the connection method with good bending performance that can be applied to steel-pipe connection in greenhouse.

Keywords
4 point bending test
bending moment
joint
vinyl-house

본 연구에서는 현장에서 사용되는 온실 강관의 이음 방 법에 대해 휨성능을 평가하고 그 결과를 바탕으로 가장 휨성능이 우수한 이음 방법을 알아보았다. 실험 결과, 모 든 실험체는 이음이 없는 실험체 보다 휨성능이 작았다. 그러나 모든 실험체의 최대 휨모멘트는 이음이 없는 실 험체 소성모멘트의 1.07~1.3정도로 나타났다. 또한 연결 방법에 따른 결과는 연결핀 보다 인발 실험체가 상대적 으로 큰 휨성능을 보였다. 현장 이음 방법의 파괴 모드는 연결핀과 강관 끝부분의 응력집중에 의한 국부좌굴이 지 배적이었다. 현장시공 시 강관을 절단 후 연결할 경우, 이음 없이 사용하는 것이 가장 우수한 휨성능을 발휘하 지만 부득이 강관을 절단할 경우는 연결핀보다는 인발 강관에 직결나사로 고정한 이음 방법(SPJ-F)으로 시공하 는 것이 유리할 것으로 판단된다.

키워드
4점 굽힘시험
비닐하우스
접합부
휨모멘트
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 27
  • No :4
  • Pages :391-399
  • Received Date : 2018-10-02
  • Revised Date : 2018-10-22
  • Accepted Date : 2018-10-23
  • DOI :https://doi.org/10.12791/KSBEC.2018.27.4.391
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