The origin of the arched corrugated steel roof: In the 1940s, some American structural engineers were inspired by the structural shapes of plant skin textures in nature and began to seek to use extremely thin materials to pass through corrugated steel roofs. A method of stiffening to create a larger span structure. They used thin steel plates as materials, established a mechanical model, and theoretically analyzed a reasonable structural form. On the road to realizing this structure, structural engineers and machinists came together. The structural requirements guided the machinists to develop a unit that can produce corrugated thin-walled structures. This is the metal roof forming machine. In 1955, the United States used this type of roof for military purposes (fighter hangars, barracks, etc.). The low cost, miraculous construction speed and good construction effect make metal roofs attract more and more researchers and a wider range of users. This structure is developing rapidly, especially the introduction of computer numerical control, which makes the design and production of metal roof structures easier and faster. However, due to various reasons (such as economy, etc.), the scientific research and development and production of molding units with this structure are limited to a few large companies in the United States, Britain and other countries (such as MIC Company in the United States). Therefore, the international market with this structure is also monopolized by these companies. This is extremely detrimental to the development and further popularization of metal roofs. In the late 1980s, our country sent personnel to the United States for inspection, but it was very difficult to completely introduce foreign technology: first, the equipment cost was extremely expensive; second, foreign technology did not take into account my country's comprehensive technical level (such as materials, loads, etc. ). Moreover, foreign countries still have reservations about the key technologies of structural analysis.
The trend of domestic arched corrugated steel roofs: Since the first metal arched roof was built in my country in 1992 relying on American equipment and technology, this structure has appeared in our country for 20 years. However, because this structure has the characteristics of light weight, low material consumption (10~25kg/m2), fast construction speed (400~1000 m2/shift), low cost (excluding insulation 160~250 yuan/m2), high indoor headroom, With its advantages of large leaping ability, beautiful shape and excellent performance, it is very suitable for my country's national conditions. Therefore, in just ten years, it has firmly established itself in my country's construction market.