Abstract ▼

□ Purpose&Contents
This study developed a method for evaluating the wind power coefficient of a greenhouse with a width of 20m or more and a height of 10m or more using a numerical method, and at the same time analyzed the structural safety according to the snow load loading method in a wide gree

□ Purpose&Contents
This study developed a method for evaluating the wind power coefficient of a greenhouse with a width of 20m or more and a height of 10m or more using a numerical method, and at the same time analyzed the structural safety according to the snow load loading method in a wide greenhouse.
In addition, it aims to establish economical structural design data necessary for the development of a standard model for farm household distribution of four seasons houses over high temperatures through optimal design techniques for greenhouse standards and materials.
The research contents are as follows.
1. Establishment of four season house structural design standards
-A study on the wind power coefficient of the four-season house considering the rise ratio (roof height/width)
-A study on the method of loading snow loads in a wide greenhouse
2. Research on optimal design of cooling house structure
-Optimal design values for the shape of each greenhouse standard considering previous the research results

□ Results
1. Wind tunnel test and computational fluid analysis (CFD) were performed to find out the wind pressure coefficient for the four-season house in the long span. After verifying the CFD analysis model using the wind tunnel test results, various greenhouse shapes and wind pressure coefficients according to the rise ratio were presented.
- Analyzing 90 models and presenting wind pressure coefficient of four seasons house over long span
- Present wind pressure coefficient for each greenhouse roof shape (arch type, peach type, roof type)
1. Using the wind pressure coefficient, a high-temperature overcoming four-season house standard model with widths of 28m, 38m, and 48m was developed.
- Design wind speed and design snow depth: 30m/s and 40cm, 40m/s and 50cm
- Greenhouse width: 28m, 38m, 48m
- Greenhouse height: 5.5m, 6.5m
- Greenhouse optimal rise ratio (roof height/width): 0.3

□ Expected Contribution
○ Establishment of structural design standards that can design large greenhouses with a width of 20m or more and a height of 10m or more.
○ Present design data for standardization of materials and construction methods for all-seasonal houses to overcome high temperatures for domesticapplication and export to desert-type climate areas.
○ Contributing to the distribution of farm households and the creation of an export base through the development of disaster tolerance standards forinnovative cooling houses that overcome high temperatures.
○ Secure competitiveness by reducing the construction cost of an innovative greenhouse that overcomes the existing high temperature through optimal design

(출처 : SUMMARY 5p)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 국 문 요 약 문 ... 4
• Summary ... 5
• 목차 ... 6
• 제 1 장 연구 개발 과제의 개요 ... 8
• 제1절 연구 개발 목적 ... 8
• 제2절 연구 개발의 필요성 ... 8
• 제3절 연구 개발 범위 ... 9
• 제 2 장 연구 수행 내용 및 결과 ... 11
• 제1절 사계절 단동비닐하우스의 외압계수 산정 ... 11
• 제2절 장경간 단동온실의 적설하중 재하도 구명 ... 66
• 제3절 사계절하우스 구조해석 ... 67
• 제4절 농가보급형 사계절하우스 모델 ... 71
• 제 3 장 목표달성도 및 관련분야 기여도 ... 78
• 제1절 목표대비 달성도 ... 78
• 제2절 정량적 성과(논문게재, 특허출원, 기타)를 기술 ... 78
• 제 4 장 연구 결과의 활용 계획 ... 79
• 제 5 장 연구 개발 결과의 보안 등급 ... 80
• 제 6 장 연구시설·장비종합정보시스템에 등록한 연구시설·장비 현황 ... 81
• 제 7 장 연구개발과제의 대표적 연구실적 ... 82
• 제 8 장 기타사항 ... 83
• 제 9 장 참고문헌 ... 84
• 끝페이지 ... 85