Steel Global Net

Abstract: This paper introduces a high-level, ultra-high-rise building structure, combined with the "R & D Center" super-tall steel structure all the production and installation of steel structures and major components up like cutting production, and other important aspect of the quality of control and material selection to provide some superficial views. The support system, energy dissipation devices, not on the article.
Key words: super high-rise building intelligent node domain, the composite beam
  I. Overview of foreign high-level steel construction in the 110 years of history, and in 1883 the first high-rise building a steel structure Chicago sprouted in the United States, to the land after World War II because of the rise and rapid population growth, and on the high-level and ultra-high-rise building on the structure of the system are maturing technology development and construction of the continuous improvement of technical level, high-level and the rapid development of super high-rise buildings. Reinforced concrete structures in the high-rise building because of the important pillars of the building area ratio increasing in the super-high-rise buildings by using reinforced concrete structure was challenged at the same time high-strength steel came into being in the super-high-rise buildings using some of Steel or Steel-wide study on the theory and design of the construction progress can be said to be synchronized.
The development of ultra-high-rise building reflects the level of developed countries in building technology, materials and comprehensive technical level, the building is a symbol of strong financial sector.
China's high-level and ultra-high-level steel construction since the reform and opening up 20 years of history, and in the design and construction of a lot of accumulated experience, our country has been prepared by the "Technical Specification Steel Tall Buildings"

Second, high-level and ultra-high-level structure for high-level and ultra-high-rise building division, building design specifications, seismic design of buildings, building fire protection design specifications do not have a uniform provisions, the general view that the construction of more than 24 m for the high-rise building with a total construction of more than 60m for the super high-rise buildings.
The structural design of speaking, the functions in accordance with the requirements of the construction, building height for different venues, as well as the proposed economic intensity earthquake-proof, reasonable, safe and reliable design principle, select the appropriate structure, is divided into six general categories: Frame system, shear wall structure, framework - shear wall structure, frame - tube structure, tube-in-tube structure, beam tube structure.
High-level and ultra-high-rise buildings in addition to structural design of reinforced concrete structures (codenamed rc), but also using steel reinforced concrete structure (code-named src), concrete-filled steel tube structure (code cfs), and Steel (s code or ss).
> Southeast of technology research and development centers, building height of 100 m, 8.4 m-net, the intensity of earthquake-proof 6, a framework - or shear wall box - tube structure more economically rational system, this structure of the shear wall system or cylinder is a good component of the anti-side, often bear the bulk of the wind load and seismic load side of the level, the overall stiffness, lateral small, and the glass walls meet the requirements of decoration.
Third, the selection of materials of steel structure has many advantages, but the disadvantage is that thermal conductivity, fire resistance of the poor. With the improvement of the metallurgical technology, fire-resistant steel for the successful research and production, the steel structure for the further development of the creation of the conditions.
Baosteel currently in production are b400rnq and b490rnq two models of fire-resistant steel, its physical and mechanical indicators, chemical properties and impact toughness and weldability, and to achieve structural steel requirements. When ordinary steel temperature reached 600 ℃, have completely lost their carrying capacity, Baoshan Iron and Steel production of these two varieties of steel reached 600 ℃ when its yield strength of 150 ~ 220 mpa. General high and ultra-high-rise building when using frames - cut, Box - tube structure of the economic statistics: Cost = Steel steel costs (approximately 40%) + fabrication and installation costs (about 30%) + fireproof coating costs (about 30 per cent), fire retardant paint proportion in the total Cost account for a large proportion. If the use of high-strength refractory steel Although prices rise slightly, but fire retardant coating prices decreased substantially, is expected to partially offset by the resulting increase in costs, but also the reliability and safety of a certain degree of protection. Source: www..co
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