Membrane structure landscape Process planning documents shall be prepared for the fabrication of membrane structures, which shall include: inspection of membrane materials, inspection of equipment and measuring tools, confirmation of cutting films, cutting methods, pre adjustment of stretching elongation, manufacturing quality standards, procedures and inspection methods, packaging and transportation. Data inspection of membrane structure Before the fabrication of membrane structure, it is necessary to inspect the membrane data and accessories used according to the planning and process requirements. The inspection target shall include the following data and parts: membrane materials, cables, hardware, sewing lines. The inspection contents shall include: appearance inspection, dimension inspection and material property inspection. Inspection method: check the warranty and data performance table provided by the supplier; Sampling re inspection shall be carried out by batch. For the re inspection of mechanical properties of membrane materials, one group of three test pieces shall be sampled for each roll of membrane materials and each re inspection item.
The production batch number, factory certificate and relevant re inspection qualification statement of the membrane material shall be verified before cutting the membrane and node fabrication. The main body of the same monomer membrane structure should use the membrane materials produced in the same batch number. The cutting plan provided by the cutting planning software shall be adjusted according to the results of the material property test after being approved by the planning. When cutting the film, avoid weaving scars, yarn knots and other defects of the original film. Folding and zigzagging are not allowed during cutting operation.
Membrane structure is a spatial structure system, which is different from general steel, wood, brick and reinforced concrete structures. It is a new structure system after grid structure, thin shell and suspension structure. In the past three decades, engineers have fully realized the effects and advantages of prestressed cables in structural systems, and various new cable and membrane structural systems have been studied and applied. According to the structure and stress characteristics of membrane structures, membrane structures can be divided into tensile membrane structures, inflatable membrane structures and frame membrane structures.
Tension membrane structure Tension membrane structure is to apply certain pretension stress to the membrane material through the boundary conditions. The membrane is both the protective body of the building and the effect of resisting external loads as a structure. Therefore, under certain initial conditions, the confirmation of its shape A series of complex problems, such as stress distribution and deformation in the membrane under the effect of external load, and how to use two-dimensional membrane data to simulate three-dimensional space surface, need to be confirmed by calculation. The development of tensioned membrane structures cannot be separated from the progress of computer technology and the proposal of new algorithms.
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