greenhouse are especially designed to provide suitable conditions which favour emergence and output of plants yearly . This is achieved through their alone structural characteristics which enable them to transmit out their specified functions . For a greenhouse to be termed as well - designed , it must satisfy key objectives such as modest construction and mathematical operation price , efficient mechanically skillful properties , efficient ventilation systems , low-down heat consumption , and allowance of high unaccented transmission .
Most live nursery may be approved as inadequate in terms of defy the design forces accord to EN 13031 and Eurocodes due to the fact that most of them are imported by European farmers from different countries such as Italy , the Netherlands , and Spain whose climatical and geomorphologic requirements are a petty different from those of European Union ( EU ) country . In other cases , the cultivators fabricate them on their own greenhouses . For all commercial-grade greenhouses , the major trouble is that the mood and terrain configurations have significant remainder amongst state ( which are also evident in dissimilar arena of the same country due to the rural geographical diversity ) ; hence , it is quite improbable that a glasshouse which was project to be used in a dissimilar country is acceptable for use in different region under the mentioned standards which regulate the installation and software of nursery in different regions . Thus , local engineers have to make change to the structural system to adapt to the special local geographic surround .
Previous studies by Kim et al . and Vázquez et al . showed that the design of greenhouse sword social organisation has several deficiencies . Kim et al . discussed the different wind loads that are auspicate base on different design codes worldwide , as well as the differences , uncertainness , and their effect on the safety of vaulted and hawk ceiling greenhouses . Vázquez et al . investigated the execution of distinctive cold - shape connections for a specific glasshouse and find that the design of the juncture was inefficient .
A new study combines wind and snow slews harmonize to European standard viands , rendering the govern onus combination for the ultimate point of accumulation state ( ULS ) figure of blade structure , which may lead to collapse . The newspaper also focuses on strengthening techniques such as capacity and safety improvement method due to poor initial design or the acceptance of design standards from different regions .
Traditionally , many nursery structures live natural disaster and various type of flop occur , which unremarkably do not ask departure of human life but meaning loss of money and wealth . Thus , to protect them from crash , appropriate repair and retrofitting technique are in need , but there is scattered noesis to date . The paper summarizes various core methods of repairing and retrofitting of such lightweight steel social system according to the code requirements . The appraisal and retrofitting of two types of existing nursery are also presented as causa study .
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