The Development of the Structural Form of Gas Station Canopy

Since Portland cement was invented in 1824, after half a century of research and development, it was not until the middle of the 19th century that concrete structures began to be applied. Because the quality of concrete and cement was relatively poor at that time, and the theory of design technology had not yet started, the development was relatively slow. At the end of the 19th century and the beginning of the 20th century, China began to build buildings with reinforced concrete structures, such as Shamian in Guangzhou and The Bund in Shanghai. However, when our country was first established, the steel output was very low, only 1.35 million tons per year. At that time, the construction of steel structures in China could only rely on the economic and technical assistance of the Soviet Union. It can be seen that the appearance of reinforced concrete structures in China was earlier than steel structures.

The structure of the gas station canopy in China was a reinforced concrete frame structure in the early days. Due to the poor crack resistance of the concrete structure and the limited height-span ratio, the construction area of the canopy at that time was mostly 100-200 square meters and the architectural appearance was monotonous and regular. With the continuous increase of China's steel production, it reached 100 million tons in 1997, which created favorable conditions for the development of China's steel structure. At this time, the flat space frame came into being, especially the successful research of welded hollow ball joints. Many small and medium-span flat space frames with welded ball joints appeared all over the country. At the same time, the use of bolted ball joints in steel structure space frames has also been promoted. . At this time, the flat space frame structure becomes a transitional form of the gas station canopy. Since China's light steel structure production process already has the characteristics of information management, integrated decoration, factory production, assembly construction and standardized design, and has greatly improved labor productivity, at the same time, the quality and safety technical standards of construction projects are in line with the current The standard requirements, and in the whole project operation to achieve energy saving, high efficiency, green environmental protection, to meet the requirements of the industrialization of new buildings, to create a broad space for the development of China's light steel structure. In addition, the thickness of the space frame structure is relatively large, and the open-air rods are easy to accumulate dust, rust and discoloration, etc., making the structure of the gas station canopy develop towards the light steel structure with solid belly H-shaped steel beams and steel columns. As far as the situation is concerned, most of the gas station canopies adopt the double-layer flat space frame structure.

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