Steel structure with wide prospects into a rapid development period
Construction steel structure with steel plate and hot-rolling refers to the cold bending or welding profiles, a by fittings can bear load, the transmission structure form loads. As a relatively new kind of industry, since beginning at the end of the 1980s, steel structures in the construction field can be widely used. After the 1990s, with the development of economy and steel industry technology and more productive, high-rise buildings, stadiums, airport terminal etc increase gradually, steel structure building into a rapid development.
At present there is no uniform steel structure industry classification standards,According to the classification usually,Generally believed that steel structure industry include space steel structure, high-rise heavy steel structure, and light steel structure, the residence with steel structure, steel and concrete composite structure five biggests domain.
Compared with traditional building,steel structure buildings have a lot of advantages,such as: high strength, light weight, good seismic performance,short construction period, high degree industrialization, little environmental pollution, and so on.As the steel structure building many merits, at present developed countries steel structure steel quantity of buildings with the proportion of the total, are commonly to 40%, and in the United States project construction, steel structure 51%, concrete structure of 49%, about 70 percent of the houses and layer 2 and under construction, all use light steel frame system. In Europe, America, Japan, Korea, China Taiwan, steel structure building already account for the total amount above 40% of the total steel quantity.
At present our country steel structure of annual crude steel production is about 4%, total construction steel structure steel quantity of buildings around 10%, compared with foreign countries is still a big development space. According to "steel structure industry," 11th five-year plan "development planning proposal, the goal, the 2010 steel structure production plans to reach the national steel production, so far, 10% of realization on schedule" 11th five-year "plan target is difficult. On the one hand reason is overheated steel production in recent years, resulting in steel structure rate is low; On the other hand, and China’s large steel structure company partial less, industry development is slow about. We suppose in 2015 national crude steel production reaches 7 million tons of crude steel, steel structure, if this target yield 8% is achieved, the next few years steel structure yield compound growth will reach about 16 percent.
Judging from the industry competitive pattern, light steel areas with low barriers to entry, the whole country at present relatively fierce qualified steel structure enterprise more than 3,000 home, basic have light steel construction ability; But chongqing steel and space steel areas due to technology and construction the demand is higher, industry concentration threshold higher, industry competition, main competitor relatively tame on industry around before 10 enterprise.
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