• 한국안전학회지
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• 제34권5호
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• pp.72-77
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• 2019

Vinyl house consists of main rafter, lateral member, clamps and polyethylene film. Many vinyl houses are used to grow fruits, flowers and vegetables in the countryside. Due to climate change, vinyl houses are often destroyed by strong winds or typhoons in summer. Many farmers suffer great economic damage from the collapse of vinyl houses. So it is very important to build a safe vinyl house and find a method to withstand this heavy wind load. In this study, a structural analysis was performed on four types of vinyl houses(10-single-4, 10-single-6, 10-single-7, 10-single-10). In addition, axial force and flexural moment are obtained from the structural analysis of four types of vinyl house. For these four types of vinyl house, structural safety was reviewed by obtaining the combined stress ratio by the strength design method. This structural review showed that the specifications for the vinyl house proposed in the design are not safe. Especially, the result of structural analysis for four types of vinyl house showed that the vinyl house structure constructed as a standard was a very dangerous structure. Therefore, it is necessary to devise diverse methods in order to make vinyl houses structurally safe for heavy wind load in the future. Also a variety of manual development is needed to prevent the collapse of vinyl houses at heavy wind load.

• 한국안전학회지
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• 제34권2호
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• pp.34-39
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• 2019

Vinyl house consists of main rafter, lateral member, clamps and polyethylene film. Many vinyl houses are used in the countryside to grow vegetables. These vinyl houses have occasionally been collapsed due to heavy snowfall in winter. Many farmers get a lot of economical damages, if vinyl houses are collapsed. So it is most important to built a safe vinyl house that can withstand heavy snowfall. In this study, a structural analysis was performed on three types of vinyl houses(07-single-01, 10-single-04, 12-single-01). In addition, the structural analysis of the three types of vinyl houses provided axial forces, flexural moment, and combined stress. For these three types of vinyl houses, structural safety was reviewed by obtaining the combined stress ratio by the strength design method. This structural review showed that the specifications for the vinyl house proposed in the design are not safe. Especially, the result of increasing the design snow load by 15 percent and 30 percent showed that the vinyl house structure constructed as a standard for vinyl house was a more dangerous structure. Therefore, it is necessary to revise regulations such as increasing the thickness of rafters or widening the gap in order to make vinyl houses structurally safe for heavy snowfall in the future, and to devise diverse methods to make vinyl houses that are structurally safe.

• 한국농공학회지
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• 제29권4호
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• pp.117-123
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• 1987

This study was conducted to develop an automatic insulation system to reduce the heat loss through the wall of greenhouses during the nighttime in winter. A double covered model vinyl house was constructed, and blowers were used to fill or remove styrene pellets automatically the inside of the double-wall of the double covered vinyl house. The effects of insulation of the double covered vinyl house insulated with the styrene pellets were analyzed by comparing with the single covered vinyl house. The results obtained from this study can be summarized as follows : 1. The optimum thickness of the double-wall of the double covered vinyl house was found to be 5 to 10 cm. 2.When the outside temperature varied in the range of -8.3 to -1.5$^{\circ}C$ during the nighttime, the inside temperature of the double covered vinyl house insulated with the styrene pellets showed 7.7 to 11.7$^{\circ}C$ and the inside temperature of the single covered vinyl house showed -5.8 to 2.3$^{\circ}C$. Therefore, the effects of insulation of the double covered vinyl house insulated with the styrene pellets were confirmed to be excellent. 3. Also, the excessive increase of the inside temperature in the vinyl house was prevented by the shading effect of the double covered vinyl house insulated with the styrene pellets during the daytime. 4. When the outside temperature varied in the range of 17.7 to 30.0$^{\circ}C$ during the daytime, it was possible to keep the inside temperature at 30${\pm}$4$^{\circ}C$ in the double covered vinyl house by operating the insulation system. 5. The transmissivity of the double covered vinyl house with the styrene pellets removed was 52.4 % on the average.

• 농촌의학ㆍ지역보건
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• 제19권1호
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• pp.25-29
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• 1994

In order to find out the effects of vinyl house body, the author compared the physical and laboratory examinations between 96 cases of vinyl house farmers and 96 cases of land farmers who lived in 3 Gun's in Kyoungnam Province from July, 1st through September, 30, 1993. The examination included blood pressure, CBC, urinalysis, and blood chemistry. Systolic blood pressure and alkaline phosphates levels were lower in vinyl house farmers than in land farmers. But white blood cell counts were higher in vinyl house farmers and the other results were not different between two groups. It suggests that the environment of vinyl house - small, poorly ventilating, hot and humid environment - affected human body, then those facts should be considered during construction of vinyl houses.

• 한국잠사곤충학회지
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• 제16권2호
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• pp.141-146
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• 1974

실내 vinyl house내에서 간이 공동사육을 위한 치잠기 특수사육의 가능성 여부를 구명하고자 실내 vinyl house육과 보습방건지육, 보통육을 비교시험을 한 결과는 다음과 같다. 1. 실내 vinyl house육은 보통육 및 방건지육에 비하여 온습도를 합리적으로 조절할 수 있었으며 모든 작업도 편리하였다. 2. 경과일시수는 실내 vinyl house육구와 보습방건지육에는 같았고 보통육구는 실험구에 비하여 춘잠치잠기에 5시간 추잠 치잠기에 6시간 길었다. 3. 감잠비율에 있어서는 춘추 공히 실내vinyl house육구와 보습방건지육구간에는 큰 차이는 없었지만 실내 vinyl house육구에서 감잠수가 약간 적었고 보통육구에서 높은 경향이었다. 4. 각견비율은 춘추 공히 유의성은 없었지만 특수육의 경우 상견비율이 높았고 보통육의 경우 중하견비율이 높은 경향이었다. 5. 대4령 기잠 1만두 수견량은 춘추잠기 공히 실내 vinyl house육구가 높은 경향이었다. 6. 견층비율은 춘추 공히 유의성은 없었지만 보통육구에 비하여 방건지육구와 실내 vinyl house 육구가 높은 경향이었다. 7. 상기의 시험결과를 종합 검사하면 실내 vinyl house육구는 대조구에 비하여 1일 3회 급상으로도 좋은 성적을 얻었으므로 간이 공동사육을 위한 치잠기특수사육장으로서 적합하다고 사료된다.

• 동국한의학연구소논문집
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• 제5권
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• pp.273-280
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• 1996

This study is to know the relation between the symptom of Vinyl House disease and seo-byung of oriental medical. The results are summarised as follows, 1. One of the pathogenic factors of Vinyl house disease is the environtal of high temperature and humidity,that is coincident with seo-byung's pathogenic factors. 2. The most common symptoms of Vinyl house disease are heaedache, sweating, dizziness, weightloss, fatigue, nausea, vomiting, numbed limb, breathless etc. that are included in seo-byung's symptoms. 3. Vinyl house disease belong to the category of the seo-byung of oriental medical. In concrete term, Vinyl house disease is come under chronic seo-byung or symptomic seo-byung.

• 한국농촌건축학회논문집
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• 제18권3호
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• pp.35-42
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• 2016

For the reason of economy, farmers and structural engineers prefer the vinyl house frame members that have the lightest cross sections. Therefore, in order to reach this aim, rod bracing system is the best method for multiple vinyl house frames. In this study, wire rods (tension members) are used to be bracing members in multiple vinyl house frames. The effects of additional wire rods in the frames are investigated by the variations of the bending moments, axial forces, displacements and combined stresses in the main frames that are reinforced by different shapes of rod bracing system. Vinyl house frames are usually made by steel pipe members and collapsed by the excessive wind and snow loads. Two kinds of bracing models are used for wind and snow loads separately in this study. The effective bracing models for each load are finally figured out.

• 한국축산시설환경학회지
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• 제5권2호
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• pp.87-92
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• 1999

Three types of commercial broiler farms were surveyed to evaluate the effects of housing and production systems on environment and performances in broiler production. Environment condition of broiler house was better in windowless type than vinyl house. Ammonia, carbon dioxide and dust in vinyl house was 28ppm, 2,000ppm, 50.5CPM, respectively. Mortality was higher in vinyl house than that of widowless broiler house. Body weights at the age of 39 days were 1,551g, 1,607g and 1,620g of vinly house, open-sided broiler house and windowless broiler house, respectively. The incidence of abnormal carcass from the vinyl house was higher than those of the others.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.69-72
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• 2002

The objectives of this study are to analysis structural characteristics of small scale vinyl house and to develope structural analysis program for optimum design. The variation of maximum section forces along the structural characteristics, location and number of purlin was analyzed in vinyl house. It was concluded that the developed structural analysis program could be used usefully for optimum design of small scale vinyl house.

• Current Research on Agriculture and Life Sciences
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• 제2권
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• pp.91-97
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• 1984

본(本) 연구(硏究)는 실험용(實驗用)의 소형(小型) 비닐하우스를 제작(製作)하여 이중(二重) 비닐하우스의 보온효과(保溫效果)를 단일(單一)비닐하우스와 비교(比較)함으로서, 무가온(無加溫) 비닐하우스에 대(對)한 보온성(保溫性)을 향상(向上)시킬 수 있는 피복방법(被覆方法)의 개발(開發)에 관(關)한 기초자료(基礎資料)를 제공(提供)하기 위(爲)하여 수행(遂行)되었으며, 얻어진 결과(結果)는 다음과 같이 요약(要約)할 수 있다. 1. 외기온(外氣溫)이 $-1.0^{\circ}C{\sim}7.5^{\circ}C$, 일사량(日射量)의 최대치(最大値)가 $1.02MJ/m^2$인 측량기간중(測量期間中)에 있어서, 이중(二重)비닐하우스의 내부온도(內部溫度)는 단일(單一)비닐하우스보다 1일(日) 평균(平均) $1.2^{\circ}C$ 높았다. 2. 측정기간중(測定期間中)의 평균치(平均値)에 대(對)하여, 이중(二重)비닐하우스의 내부온도(內部溫度)는 단일(單一)비닐하우스보다 주간(晝間)에는 $2.3^{\circ}C$, 야간(夜間)에는 $1.2^{\circ}C$높았다. 3. 실험용(實驗用) 비닐하우스에 대(對)하여, 비닐하우스 내부온도(內部溫度)는 외기온(外氣溫)과 (식(式)1)~(식(式)6), 일사량(日射量)과 (식(式)7)~(식(式)10)의 관계(關係)를 가지고 있었다. 4. 외기온(外氣溫)을 기준(基準)으로 한 이중(二重) 비닐하우스에 보온효과(保溫效果)는 단일(單一) 비닐하우스에 비(比)하여, 주간(晝間)에는 1.20배(倍), 야간(夜間)에는 1.76배(倍)로 나타나, 야간(夜間)이 주간(晝間)보다 높았다.