Guangzhou Steel teach you: prestressed steel structure
As a low-carbon green green building, steel structure construction should to build capital-saving, environment-friendly society to play a greater role. Judging from the current situation, China's proportion of steel structure construction remains low, less than 9 percent, far short of the 30% level of developed countries. In addition, there are more than 70 million seats bridge, steel bridge less than 2 percent, while Japan, the United States was 40 percent. Thus, the material is not the root cause of the development of the steel structure of the constraints. It appears a large number of steel structure construction Water Cube, and the Shanghai World Expo, but also fully proved that China's steel structure manufacturing and construction skills to achieve world-class standards. Therefore, to change the traditional concept of construction, steel structure built to further improve people's living functions, should be to promote the development of a viable steel construction of the road. Guangzhou Steel
In recent years, due to the many large-scale public construction we have chosen steel structure, the steel structure built in the country's influence growing. However, since the relevant specifications of steel construction, design specifications is not perfect, steel structure residence has not yet developed. In addition, the construction of a number of built strong visual impact, ruined a lot of steel to society a misconception that the steel structure is ruined steel. So, how to develop the construction of the steel structure, in order to reduce the excessive use of steel it?
Development of prestressing steel structure should be able to be a choice. The so-called prestressed steel structure, is that people consciously steel structure bearing system introduced to counteract anthropogenic stress load stress, adjustment of internal forces peak, enhanced rigidity structure and stability, improving the structure and other properties to create a new system using prestressed skills. Its main features are: ① full and repeated use of elastic strength steel magnitude, thereby enhancing the structure bearing capacity. ② improved stress state structure, to save steel. From the current situation, the prestressing steel construction can save 30% .③ progressive structure rigidity and stability, improving the structure of the various properties.
Prestressed steel structure can produce enormous economic benefits, can save a lot of steel, reduce the overall cost. Many factors economy and structural system of prestressed steel structure, Tendon Disposition program and technology, nature and intensity of the load, structure and node configuration, installation method and materials prices and so on. Under normal conditions, the prestressed steel structure than the non-selection of a single prestressed steel structure Tension can save 10% to 20% of the steel, the steel can save 20% to 40% of the times when tension while prestressing innovation system construction and nonprestressed traditional structure is more to save steel several times or more. In short, the potential of construction material strength, the higher the selection of prestressed economic benefits. For example, in the vicinity of the central axis solid web beam section contains a lot of strength potential. Selection of prestressed year after its economic lattice beam is much higher. Guangzhou Steel
Prestressed steel structure frivolous, easy to control, the whole structure can reduce the amount of steel. We must pay attention to optimize the design questions, including grid, force uniform, mesh size, daily temperature changes, optimizing the design to be taken into account. In addition, there are questions, structure sensitivity, fatigue wind, need special attention. Currently, the construction of prestressed steel structure built mainly representative Hunan Changde Stadium (120 m × 80 m), Zhejiang Huanglong Stadium, Guiyang Sports Centre (span 200 meters, the largest cantilevered 49 meters), the National Indoor Stadium, Beijing University Badminton Hall et al., in the construction of the Yellow River Hukou Museum, Ordos Dongsheng stadium, Liaocheng, Shandong Stadium. Among them, 12,000 tons of steel Dongsheng stadium, steel construction area of 40,000 square meters, 300 kilograms per square meter of steel. Steel too, after prestressing steel construction cable work, it should significantly reduce the amount of steel. General should be 15 kg to 200 kg per square meter, the Water Cube is 240 kilograms per square meter, Beigong badminton hall is 62 kilograms per square meter.
Practice has proved that the prestressed steel structure is safe, lightweight, efficient, domestic and foreign construction unit, peer recognition. Guangzhou Steel
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