Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The steel structure has the advantages of good mechanical properties, high degree of industrialization and environmental protection. These advantages are particularly prominent in the construction of high-rise buildings, large space facilities, commercial facilities, factories and warehouses, and complete equipment structures. Although the difference between the steel structure and the concrete structure is about 5% to 10% of the total project investment, the steel structure has better comprehensive economic and social benefits. At present, the application and development of steel structure in the field of construction has entered a golden period. Due to the strong promotion of the prefabricated steel structure policy, the practical needs of the industrialization reform of the construction market and the direct driving force to solve the problem of steel overcapacity, the development space of steel structure buildings is becoming more and more broad.
Policy support, industrialization demand, and the increase in steel production have greatly promoted the development of steel structure buildings. Steel structure has a series of advantages such as superior structural performance, meeting building needs, high degree of industrialization, green materials and environmental protection, and should focus on the application of steel structure in the field that can play the advantages of steel structure; Compared with concrete structure, steel structure has better comprehensive economic and social benefits; The formulation and revision of relevant standards for steel structures have provided standardized guidance for structural design and made important contributions to the popularization of steel structures. The rods can be made of a variety of materials, mainly steel pipes or profiles. The space frame structure has replaced the reinforced concrete structure in many occasions because of its factory production, site installation, convenient construction, labor saving and other advantages.
The vigorous development of the space frame structure is due to its series of advantages. The first is that the space frame can play a spatial role, because all the rods can participate in the work and have good mechanical performance, its stiffness and integrity are better than the general plane structure, and can effectively withstand a variety of asymmetric loads, concentrated loads and dynamic loads. The overall force of all the bars in the space frame also shows its excellent anti-seismic characteristics under earthquake action. Secondly, the production and installation of the space frame structure is more convenient. Rods and nodes can be produced in the factory, so that the on-site workload is reduced to a low level, and at the same time, there is no need for complex technology, which is easy to carry out customized industrial construction of the space frame.
Because the construction of the space frame structure is more complex than the general plane structure, because it can not play a spatial role before being assembled into a whole, the space frame structure has been gradually promoted in the large-span stadium, and a variety of installation methods have been used in the construction, and a series of installation technologies with Chinese characteristics have been created. For example, Shanghai Stadium local assembly, overall lifting, high-altitude displacement installation methods, in the 1970s, there were divided production, high-altitude slip assembly, local assembly, overall lifting and other installation methods. The improvement and innovation of these methods have played a strong role in promoting the further application of the space frame on the large and medium span roof.
