A review on stability of polyhouse structures

Abstract

Naturally ventilated polyhouse is popular all over the world for growing high value cropssuch as capsicum, tomato, lettuce, herbs etc. and these polyhouses are available in different designs as per different climatic conditions. Structure failure is the major problem faced by farmers throughout the world. The several studies carried out throughout the world shows that the single design of polyhouse cannot be adopted throughout the country due to different agro-climatic conditions.As per differentstudies, polyhousestability designs are analyzed for dead load, live load, snow load, wind load and load combination and Loads were calculated by adoptingdifferent National Standards. Moreover, Truss members, columns and foundation stability analysis is carried out by considering dead loads, live loads and wind loads in most of the studies. Support reactions arealso calculated on truss joints and column joints. The optimum design of any polyhouse generally depends on its structural design, specific mechanical and physical properties of the individual structural components i.e., foundation, hoops, lateral support, polygrip, assembly and end frame. From all the studies it is reported that in most parts of the world, wind is the major force responsible for the failure of any polyhouse structure.

Advances in methodologies to assess wind actions in plastic-covered greenhouses

“…The use of plastic film as a covering material for greenhouses, along with a light structural system, results in a light and flexible construction, whose leading cause of structural damage has been adverse climate actions, such as intense winds (Bronkhorst et al, 2017;Kwon et al, 2016;Moriyama et al, 2008;Singh et al, 2021;Uematsu and Takahashi, 2020;Wang et al, 2021;Yun et al, 2014a). The wind is considered one of the root causes of accidents in greenhouses.…”