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2017 Vol.26, Issue 4 Preview Page
Effect of the Member Joint on Structural Performance of an Arch-type Multi-span Greenhouse: A Full-scale Experimental and Numerical Study

부재 접합부가 아치형 연동온실의 구조 성능에 미치는 영향: 실대형 실험적 및 해석적 연구

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 2017. pp. 402-410
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Abstract

The effect of the steel pipe member joint on the design performance of a plastic multi-span greenhouse was analysed through the comparing full-scale experiment and numerical analysis. The design performance of the greenhouse is generally evaluated through numerical analysis, but it is rare to consider the characteristics of the connections or joints of the members. In this study, the effect of the column-gutter beam-rafter-wind break wall joint on the design performance of the whole structure of a plastic multi-span greenhouse was analysed. The numerical results with assuming that the member joint are rigid condition were compared with the full-scale load test results using member joints used in the field. The stiffness of the entire structure was compared using the load-displacement relationship and the change of the load sharing ratio that the main members such as column, rafters, and wind break wall was analysed. The results of the load test were about 40% larger than the numerical result and the member stress was more than twice as large as those of the loaded columns. In order to increase the reliability of the design performance of the greenhouse, it is necessary to develop a numerical analysis model which can consider the characteristics of various joints.

Keywords
connection
finite element analysis
fracture
load test
load sharing ratio

본 연구에서는 실대형 실험과 구조해석을 통하여 현장 에서 사용되는 기둥-서까래-도리, 기둥-도리-방풍벽 접합 부를 적용한 강관 골조 플라스틱 연동온실의 정적 구조 성능을 분석하였다.

실대형 재하실험 결과는 접합부를 강접합으로 가정한 구조해석 결과와 비교하여 구조물의 횡방향 강성과 각 부재의 하중분담률에서 많은 차이를 보였다. 동고 높이 에서 측정한 수평변위는 실험과 구조해석의 차이가 40% 이었고 수직변위는 89%의 차이를 보였다. S3 부재의 발 생응력을 기준으로 한 각 부재별 하중분담률을 비교한 결과 실험과 구조해석에서 두 배 이상의 차이를 보이는 부재가 있었으며, 하부측벽이음(S2), 기둥 상부(S7) 등 주요 부재의 실험결과가 구조해석의 하중분담률을 재현 하지 않았다.

현장에서 사용하는 접합부가 충분한 강성을 확보하지 않음으로써 구조물에 작용하는 외력을 각 부재에 적절하 게 전달하지 못했으며 이로 인해 구조물의 강성이 저하 되는 현상이 나타났다. 설계 단계에서 일반적으로 구조 해석에 의해 결정되는 구조성능의 신뢰도는 접합부의 특 성을 보다 면밀하게 고려했는지 여부에 따라 좌우 될 수 있다. 따라서 온실 구조 성능에 대한 신뢰성을 높이 기 위해서는 온실에 사용되는 다양한 접합부를 고려할 수 있는 구조해석 기술의 개발이 필요하며 설계 기준에 서 상세 설계 방법을 보다 명확히 규정해야 할 것으로 판단된다.

키워드
연결부
유한요소해석
파괴
하중 분담률
하중 실험
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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 : 26
  • No :4
  • Pages :402-410
  • Received Date : 2017-09-21
  • Revised Date : 2017-10-11
  • Accepted Date : 2017-10-21
  • DOI :https://doi.org/10.12791/KSBEC.2017.26.4.402
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