The advantages and conditions of steel warehouse building
The "bulk density to strength ratio" of steel is generally smaller than that of wood, concrete and masonry, so steel structure is relatively light, 30%-50% lighter than reinforced concrete structure; in addition, steel structure has a small cross-section, which can be compared with reinforced concrete structure. Increase the effective area of the building by about 8%. The Songhua River Steel Truss Bridge, the Yellow River Bridge, and the Shanghai International Hotel built in the early twentieth century adopted steel structures; after the founding of the People’s Republic of China, the development of steel structures for civil high-rise buildings in my country further accelerated. Central Beijing occupies six buildings: Jingguang Center (208 meters high), Jingcheng Building (182 meters high), China World Tower (155.2 meters high), Changfu Palace Hotel (90.9 meters high), Shangri-La Hotel (82.7 meters high) , Industrial and Commercial Bank of China (48.3 meters high), and the National Grand Theater project under construction. Hundreds of airports across the country will be designed with steel structures to speed up construction and increase space. It can be seen that a high-speed economy needs steel structures.
Policies and technical conditions are already in place. At the beginning of this year, the Ministry of Construction and the State Administration of Metallurgical Industry jointly organized the Construction Steel Technology Coordination Group to formulate the "Tenth Five-Year Plan for the National Construction Steel Structure Industry and the Outline of the 2015 Development Plan." The outline clearly states: steel structure has a series of advantages such as high strength, light weight, good seismic performance, fast construction speed, low foundation cost, small footprint, high degree of industrialization, and beautiful appearance. In addition, steel structure buildings also have good The sense of space can be designed into a large number of open offices surrounding the sky garden, central patio and reasonable elevator design to achieve the lowest energy consumption. Therefore, the steel structure is also an environmentally friendly and energy-saving building structure. Compared with the concrete structure, it is an environmentally friendly and reusable structure that is easy to industrialize, and steel structures are widely used in housing construction in developed countries. Financial Street is the most modern neighborhood in Beijing. In view of the above-mentioned advantages of steel structure housing, as the only high-end apartment on Financial Street at present, in order to create a more comfortable sense of space and save energy, Jinchen Apartment is designed with a steel structure. High-grade housing, and was rated as the first residential steel structure system demonstration project of the Ministry of Construction in Beijing after the announcement of the outline. It is also the only small high-rise steel structure residential project in Beijing.
The increase in steel products and construction steel varieties has laid a good foundation for the development of steel structures. my country’s steel output exceeded 100 million tons in 1996, and it has become a major steel country in the world. As the country pays close attention to the progress of metallurgical science and technology in the 21st century and improves the technical level and assembly level of my country’s iron and steel industry, my country is expected to become the world’s largest country by 2020. Power of steel. H-beams that could not be produced for a long time in the past can now be produced in Maanshan Iron & Steel, Laiwu Steel and Anshan No. 1 Steel Rolling Plant. The maximum cross-section of H-beam has reached 700mm, and the annual production capacity can reach 1.4 million tons. The current annual production capacity of colored steel plates for light steel structures has reached 700-900,000 tons, and the annual production capacity of cold-formed steel is about 1.2 million tons. This laid the foundation for the development of steel structure buildings. The development goal of the construction steel structure during the "Tenth Five-Year Plan" period is to strive to achieve 3% of the total steel production in the country every year. The development goal of building steel structures in 2015 is to strive for the annual steel consumption of building steel structures nationwide to reach 6% of the total steel. It can be seen that the development of my country's construction steel structure will reach a new level. Efficient welding process and the application of new welding and cutting equipment. Such as the double-sided forming single-wire and multi-wire submerged arc welding of various reverse backing methods, the double-sided double-wire rapid welding production line of gantry I-beam, various CNC flame machines and laser cutting machines, for efficient production and production of steel structures High-quality products create good conditions. The use of high-efficiency welding materials, such as gas shielded welding and self-shielded flux-cored welding wires and various high-efficiency welding rods, will account for about 40% of the total output of welding materials by 2005; friction-type strong bolts and the use of automatic torque control methods, as well as anti-corrosion, The development of new technologies such as fire protection and new materials have created good conditions for the in-depth development of steel structure engineering.
steel warehouse building