A Study on a Simple Foundation Structure and a Wind-resistant Design of Plastic Greenhouses that Considers Location and Layout for Improving Wind-resistance.
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Accession number;00A0624852
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| Title;A Study on a Simple Foundation Structure and a Wind-resistant Design of Plastic Greenhouses that Considers Location and Layout for Improving Wind-resistance. |
| Author;
TOYODA HIROMICHI
(Minist. of Agric., For. and Fish., Natl. Res. Inst. of Agric. Eng.)
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Journal Title;Bulletin of the National Research Institute of Agricultural Engineering
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Journal Code:S0487A
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ISSN:0915-3306
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VOL.;NO.39;PAGE.121-160(2000)
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| Figure&Table&Reference;FIG.52, TBL.8, REF.75 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Horticultural greenhouses in Japan play an important role in the year-round stable supply of fresh vegetables, quality improvement of fruits, and labor-sharing, income stabilization of farm households. The distribution of such greenhouses has been steadily expanding despite the severe agricultural environment. Nevertheless, damage to greenhouses due to strong winds and heavy rainfall caused by typhoons increases each year due to their light-weight structure. Due to economic and farming restrictions, however, the sizes of structural materials used for columns, beams and the foundations cannot easily be increased to strengthen the greenhouses. Unfortunately, few studies have been conducted on the foundation, locations and layout of greenhouses, and even the structural standards of horticultural facilities do not provide specific descriptions about them. The author developed a foundation structure that does not use concrete and a greenhouse design method which considers the location and layout for purposes of desiguing low-cost and resource-saving horticultural plastic greenhouses while ensuring wind-residence. This paper describes the results. Focusing on the structural strength, location and layout, damage to greenhouses by typhoons was investigated in Chiba and Okinawa prefectures in terms of, 1) bending of the structural materials of the roofs of greenhouses on inclined grounds such as hillside slopes, 2) deformation of framework materials and surfacing of concrete foundations of greenhouses on flat grounds, and 3) pull-out of framework pipes in facilities near river embankments. In addition to these framework structure materials and foundations that need to be examined to identify the structural weakness of greenhouses, the author found that the characteristics and extent of damage varied due to differences in the locations of plastic greenhouses, and suggested that their location and layout should be considered.... (author abst.) |
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