| This paper expounded the necessity and importance of structural calculation of gutter-connected greenhouse. It is based on the research of the development lever of greenhouse overseas and the present situation that gutter-connected greenhouse is developing in China. According to the mechanics theory and constructional standards, The half structure calculation model of a gutter-connected greenhouse under wind loading and snow loading was developed, and loading combination was considered. After elastic & plastic calculating on Frame Structure, its elastic & plastic limit stress and stability coefficient of frame column as well as stability coefficient of frame were gotten with the finite-element method and with constructional standards. Four types of greenhouse have been calculated by the means above. Its structure was improved in terms of the danger zone of frame gotten with calculation. The result indicates that the structure of this greenhouse is rational, and has fine mechanics properties. In the end, this paper also has given an error analysis on several common girders under vertical and horizontal bend, the analysis based on two means: one is LISI-IEN, a finite-element method software, the other is stability formula of the constructional standards. A new coefficient is put forward to modify the standards formula. |
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