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Test Methods for Evaluation of Slip-Resistance Force of Clamp for Plastic Greenhouse

플라스틱 온실 죔쇠의 미끄럼 저항력 평가를 위한 실험 방법

Man-Kwon Choi1†
,
Ho-Sung Song2†
,
Myeong-Whan Cho1
,
In-Ho Yu1
,
Young-An Shin1
,
Seong-Yoon Lim2
,
Hee-Ryong Ryu1†
최 만권1†
,
송 호성2†
,
조 명환1
,
유 인호1
,
신 영안1
,
임 성윤2
,
류 희룡1†
1Protected Horticulture Research Institute, NIHHS, RDA, Haman 52054, Korea
2Department of Agricultural Engineering, NAS, RDA, Wanju 55365, Korea
1농촌진흥청 국립원예특작과학원 시설원예연구소
2농촌진흥청 국립농업과학원 농업공학부
†These authors equally contributed to this work.
*baradori@korea.kr
30 July 2016. pp. 193-199
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Abstract

The research discussed experimental results on slip resistance force of rafter-purlin connection of plastic greenhouse and suggested a test method for evaluating slip resistance performance of the connection. Slip resistance forces were measured by four kinds of constraint conditions for specimens, for example, fixing or rolling the end of specimen. According to tests, it is noticed that constraint condition is able to significantly affect the slip resistance force. From a post-hoc comparison result, slip resistance force of test under fixing ends condition was larger than those under the other three constraint conditions. But the slip resistance force results in the fixing ends condition had greater measure of dispersion and three times of standard deviation than those from other constraint conditions. Based on the results obtained, effect of constraint condition for specimen on the slip test should be studied to enhance reliability of evaluation test of the slip resistance performance.

Keywords
cross connection
purlin
rafter
slip test
vinyl house

본 연구에서는 플라스틱 온실에서 사용하는 죔쇠의 성능 평가 시 시험편 끝단의 구속조건이 미끄럼 저항력에 미치는 영향을 분석하기 위해 시험편 구속조건을 실험변수로 판형죔쇠의 미끄럼 저항력을 측정하였다.

각 구속조건별로 측정한 미끄럼 저항력의 평균값은 서까래 고정-고정단이 가장 컸으며, 내재해형 죔쇠의 평가 기준 값과 비교한 결과에서도 서까래 고정-고정단의 경우에만 기준을 만족하는 것으로 나타났다. 그러나 서까래 고정-고정단 구속조건은 다른 구속조건들에 비해 산포도가 상대적으로 크게 나타나 신뢰성이 떨어지는 결과를 보였다. 또한, 일원분산 분석결과에서도 서까래 고정-고정단은 다른 구속조건들과 비교해 미끄럼 저항력이 유의한 차이를 보였다. 따라서 시험편 구속조건이 미끄럼 저항력 평가에 영향을 미친다고 판단하며 연구자 및 기술자들이 죔쇠의 미끄럼 저항력을 측정할 때에는 시험편의 구속조건이 결과값의 신뢰성에 미치는 영향을 면밀히 검토해야 할 것으로 판단된다.

키워드
교차 접합
도리
미끄럼 시험
비닐하우스
서까래
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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 : 25
  • No :3
  • Pages :193-199
  • Received Date : 2016-08-24
  • Revised Date : 2016-09-22
  • Accepted Date : 2016-09-22
  • DOI :https://doi.org/10.12791/KSBEC.2016.25.3.193
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