Steel construction is a resource-saving building
National "Eleventh Five-Year Plan" resource conservation as a basic national policy, the development of circular economy, protect ecological environment and resource conservation to achieve sustainable development. As an important energy-saving architectural forms, steel construction resource consumption less per square meter, the amount of consumption of resources is about 800 ~ 1000kg, of which 50% is a renewable resource, the amount of consumption of resources and reinforced concrete structure per square meter in the 1700kg or more.
The amount of construction steel in China accounted for 30% of the amount of steel, the United States, Japan, 50% to 55%, the volume of China's construction steel steel steel accounted for 10%, and the United States reached 40% to 50% can be seen, the application of steel structure is quite common in developed countries. The Ministry of Construction, steel accounts for 60% of the entire amount of steel, 2010 steel, steel level of development in China with a certain gap.
Industrial upgrading of steel building and construction industry
"Housing industry" concept was first proposed by the German in 1910, nearly 100 years, many European countries a large number of construction steel, high-rise buildings, and gradually form a high steel structure industrial production and assembly level. After China's accession to the WTO, the construction industry is facing serious challenges with international standards, but the domestic construction industry is still labor-intensive industries and less efficient. Steel buildings are high-tech, high-efficiency products, steel construction, will effectively promote the construction of technological progress and the construction of industrial upgrading, conversion to technology-intensive industries, but also will drive the development of China's steel industry.
The comprehensive benefits of steel construction significantly steel construction is easy to realize the factory, large-scale production, short construction period than the traditional brick and concrete and reinforced concrete structure, the scene less labor, high labor productivity, and quality assurance Yi. Another prominent advantage of the steel construction is light weight, good ductility, excellent seismic performance for the countries of the earthquake disaster in China, can significantly reduce the losses caused by the earthquake. Steel buildings insulation performance is conducive to building energy efficiency, at the same time steel recyclable, in line with the central "vigorously develop the circular economy, the principle of building a conservation-oriented society". China's steel is an adequate supply of domestic steel, regardless of quality, price, or varieties, specifications to meet the steel building needs.
Developed countries after nearly a century of development, introduced in the construction of the steel construction process of the manufacturing sector, about to the whole structure is divided into several modules, arriving on-site assembly plant after processing. This mode of production not only quality assurance, and non-wet work in the construction process, less environmental pollution. The intensity ratio of the gravity of the steel structure is 3, the ratio of the strength of gravity is 14, therefore steel is the lightest structure, the structure of the smallest, and good ductility, good seismic performance. Steel buildings construction speed, space utilization, flexible interior layout is also very prominent, required for small construction site by the developers favor.
Steel costs account for the proportion of total project investment. Under normal circumstances, the cost of the project accounted for 60% of the total project investment structure accounted for about 25% of project cost, the steel superstructure costs accounted for 65% of the structure of costs, steel costs accounted for 45% of the cost of the steel superstructure, the actual steel costs accounted for only 4.4% of the total project investment. Compared with the reinforced concrete structure, steel structure can shorten the duration of 1/3 or even 1/2. Shorten the construction period, construction projects can be put to use in advance, the loan interest will be greatly reduced. Construction projects ahead of schedule put into use the gains significantly higher than the spread of steel than the reinforced concrete structure. With the development of China's steel structure design level, the production of steel construction industry, a gradual increase in volume level, the economic benefits will be further improved.
