The Research Of The Base Design Thoery And Nodes Construction Of The Tensioned Cable-membrane Greenhouse

In recent years the heavy snow and freezing disaster has created a massive loss to our country's economy. The greenhouse and cash crop loss is the most serious, most of the greenhouse was dameged, it lead to crop failures. The backwardness of greenhouse in our country was exposed completely in the disaster. So the research of the new greenhouse is imperative. This paper will use the cable-membrane structure to the area of agriculture, it can improve the disadvantages:such as the low-intensity, the little-span, the low level of mechanization, and so on; has a special background of the new greenhouse research and development, at the same time it can solve in the cable-membrane structure development and the application basic question in our country. But there is no research in this aspect at present domestic, so this paper does some reseach about the tensioned cable-membrane greenhouse structure.In chapter 1, on the basis of plenty of relevant documents, this paper simple introduced the status of development of greenhouse and cable-membrane structure firstly, and then it also introduced the background and the forced characteristics of the tensioned cable-membrane greenhouse structure. Finally the main contents are pointed out.In chapter 2, introduced the form-finding theory of the tensioned cable-membrane greenhouse structure, and then use the 3D3S analyze a particular form, find out the affects of the cable pretension and boundary conditions to the structure.In chapter 3, on the basis of the analysis of the form-finding, considered the tension stiffness, pretension membrane, the pretension cable, and so on, find out the effects of these to the structure.In chapter 4, according to the existing cable-membrane structure theory, uing the 3D3S to simulation analysis,find out the practical patterning method for the tensioned cable-membrane greenhouse structure.In chapter 5, considering the node intensity, economics, difficulty in the construction, and so on, to improve the design method and put forward some parametric designs and Programs of the nodes.In chapter 6, summarize the work what have been done in this paper, and the recommendation and perspectives are put forward.