I. The rapid growth of China's steel output has laid a good foundation for the steel structure industry. 1. Steel production China's steel output reached 349.4 million tons in 2005, accounting for 31.6% of the world's total output, exceeding the total of the United States, Russia, Japan and Korea. .
Steel structure accounts for about 5% of steel production, and the construction steel structure industry is one of the largest steel industries. 3% of steel production is construction steel structure, that is, more than 10 million tons.
The application of steel structures in large-scale landmark buildings has become fashionable, steel structures have been widely used, and the entire industry has shown a prosperous scene.
2. Market demand Newly built steel structure industry and civil buildings every year:
20 high-rise steel structures, 1.5 million square meters;
Heavy industrial plant, 10 million square meters;
1500 grids and net shells, 2.5 million square meters;
20 space truss buildings, 600,000 square meters;
10 million square meters of light steel door frame factory;
Corrugated arched steel roof covering 2.5 million square meters;
1 million square meters of steel structure residential;
300,000 tons of bridges; 1 million tons of containers;
1 million tons of towers; 100,000 tons of marine engineering; 2 million tons of steel for urban construction.
3. Development of steel structure industry In the early 1990s: more than 3 million square meters of steel structure houses, more than 1 million tons of steel structure processing, and more than 400 steel structure installation and installation enterprises.
In 2005: more than 28 million square meters per year of steel structure houses, more than 10 million tons of steel structure processing, and thousands of steel structure production and installation enterprises with market access conditions. There are tens of thousands of related enterprises and small enterprises that are not registered in the steel structure industry. Among them: about 50 of the annual output of 20,000 tons; the annual output of some enterprises is more than 100,000 tons. In China, it has undertaken a large number of steel structure fabrication and installation projects with complex structure, large scale and high difficulty, which indicates that China's steel structure industry has strong production capacity and high technical level.
The steel structure industry is estimated to have an annual output of about 14 million tons and an output value of more than 100 billion yuan. The processing capacity basically meets the needs of engineering construction and is still expanding.
Second, the steel structure has been recognized as a green environmentally friendly product, and the steel structure project has outstanding performance. 1) Heavy industrial plant;
2) Light steel gantry;
3) Multi-layer, high-rise steel structure;
4) Large span steel structure (grid frame, net shell, suspension cable, cable membrane, tensioned whole, diagonally pulled.......);
In the past ten years, progress has been made in the research and application of space structures, and a large number of spatial structures spanning more than 100 meters have appeared. The grid frame, the net shell, the pipe truss, the cable-membrane tension structure and the string-string beam structure have become the mainstream of the large-span space steel structure.
5) Steel structure house (frame, light steel keel);
6) Steel pipe structure;
7) Combined structure.
Third, there are problems (1) steel structure processing, installation quality needs to be further improved.
(2) Lack of professional and technical personnel in steel structure of SMEs.
(3) The market operation is not standardized, and bidding companies compete to reduce prices.
At present, the annual production capacity of domestic steel structure processing enterprises has reached more than 12 million tons, but the steel structure production capacity is much larger than the actual production. Many new enterprises and small enterprises have insufficient tasks and the production capacity cannot be utilized, resulting in a large gap between supply and demand. The chaos that leads to vicious competition in the market and mutual price reduction has reduced profits. This is also one of the difficulties faced by the current steel structure industry.
(4) Standards and application standards are missing and lagging.
(5) The threshold for enterprises to enter the steel structure industry is low.
(6) The promotion of steel structure housing is not enough and the development is not fast. The technical standards are lagging behind, and the design and construction are far from the requirements of standardization, industrialization, and assembly.
IV. Development goals of the “Eleventh Five-Year Plan†1) Domestic steel production will reach 450 million tons during the “11th Five-Year Plan†period.
Steel for steel structure in developed countries generally accounts for 10% of steel production. China currently only accounts for 5%, and there is still room for development. China Steel Structure Association's "Eleventh Five-Year Development Plan Proposal" proposed that steel used in the steel structure industry in 2010 will reach 10% of steel production, of which construction steel structure will reach 6%, about 21 to 27 million tons.
2) Achieve 50 special steel structure manufacturing enterprises, 200 at the first level, and 1000 at the second and third levels. The production and processing capacity is 3,000 to 40 million tons. Focus on the promotion of light steel structure, large-span space structure, high-rise steel structure, steel-concrete composite structure, steel structure residential.
Promoting steel-structured houses is one of the ways to industrialize residential construction. It is estimated that China's urbanization level will reach 40-50% in 2010, urban population will increase to more than 600 million, and new buildings of about 2 billion square meters will be added each year, such as 10 % adopts steel structure and consumes 12 million tons of steel. It is suggested that the industry should take the lead in setting up a steel structure residential promotion center, joint construction, design, construction, and supporting materials production units to carry out project pilots and gradually increase the proportion of steel structure housing.
3) Optimizing and perfecting the industrial chain is the only way to accelerate the development of the steel structure industry. It is necessary to further improve the design level of steel structure companies and increase investment in research and development.
Strengthen the detailed management of the steel structure and deepen the design of the steel structure. Through the setting and review of the detailed qualification of the steel structure, support enterprises with high technical quality and high social credibility, and eliminate inferior enterprises. Comprehensively improve the technical quality of the detailed steel structure market, maintain market order, and eliminate vicious competition.
4) In the field of steel structural fittings, materials and processing equipment, enterprises are encouraged to aim at the advanced level at home and abroad according to the development of the steel structure industry, develop new technologies, new processes and new materials, reduce costs and promote the development of the industry.
Steel structure accounts for about 5% of steel production, and the construction steel structure industry is one of the largest steel industries. 3% of steel production is construction steel structure, that is, more than 10 million tons.
The application of steel structures in large-scale landmark buildings has become fashionable, steel structures have been widely used, and the entire industry has shown a prosperous scene.
2. Market demand Newly built steel structure industry and civil buildings every year:
20 high-rise steel structures, 1.5 million square meters;
Heavy industrial plant, 10 million square meters;
1500 grids and net shells, 2.5 million square meters;
20 space truss buildings, 600,000 square meters;
10 million square meters of light steel door frame factory;
Corrugated arched steel roof covering 2.5 million square meters;
1 million square meters of steel structure residential;
300,000 tons of bridges; 1 million tons of containers;
1 million tons of towers; 100,000 tons of marine engineering; 2 million tons of steel for urban construction.
3. Development of steel structure industry In the early 1990s: more than 3 million square meters of steel structure houses, more than 1 million tons of steel structure processing, and more than 400 steel structure installation and installation enterprises.
In 2005: more than 28 million square meters per year of steel structure houses, more than 10 million tons of steel structure processing, and thousands of steel structure production and installation enterprises with market access conditions. There are tens of thousands of related enterprises and small enterprises that are not registered in the steel structure industry. Among them: about 50 of the annual output of 20,000 tons; the annual output of some enterprises is more than 100,000 tons. In China, it has undertaken a large number of steel structure fabrication and installation projects with complex structure, large scale and high difficulty, which indicates that China's steel structure industry has strong production capacity and high technical level.
The steel structure industry is estimated to have an annual output of about 14 million tons and an output value of more than 100 billion yuan. The processing capacity basically meets the needs of engineering construction and is still expanding.
Second, the steel structure has been recognized as a green environmentally friendly product, and the steel structure project has outstanding performance. 1) Heavy industrial plant;
2) Light steel gantry;
3) Multi-layer, high-rise steel structure;
4) Large span steel structure (grid frame, net shell, suspension cable, cable membrane, tensioned whole, diagonally pulled.......);
In the past ten years, progress has been made in the research and application of space structures, and a large number of spatial structures spanning more than 100 meters have appeared. The grid frame, the net shell, the pipe truss, the cable-membrane tension structure and the string-string beam structure have become the mainstream of the large-span space steel structure.
5) Steel structure house (frame, light steel keel);
6) Steel pipe structure;
7) Combined structure.
Third, there are problems (1) steel structure processing, installation quality needs to be further improved.
(2) Lack of professional and technical personnel in steel structure of SMEs.
(3) The market operation is not standardized, and bidding companies compete to reduce prices.
At present, the annual production capacity of domestic steel structure processing enterprises has reached more than 12 million tons, but the steel structure production capacity is much larger than the actual production. Many new enterprises and small enterprises have insufficient tasks and the production capacity cannot be utilized, resulting in a large gap between supply and demand. The chaos that leads to vicious competition in the market and mutual price reduction has reduced profits. This is also one of the difficulties faced by the current steel structure industry.
(4) Standards and application standards are missing and lagging.
(5) The threshold for enterprises to enter the steel structure industry is low.
(6) The promotion of steel structure housing is not enough and the development is not fast. The technical standards are lagging behind, and the design and construction are far from the requirements of standardization, industrialization, and assembly.
IV. Development goals of the “Eleventh Five-Year Plan†1) Domestic steel production will reach 450 million tons during the “11th Five-Year Plan†period.
Steel for steel structure in developed countries generally accounts for 10% of steel production. China currently only accounts for 5%, and there is still room for development. China Steel Structure Association's "Eleventh Five-Year Development Plan Proposal" proposed that steel used in the steel structure industry in 2010 will reach 10% of steel production, of which construction steel structure will reach 6%, about 21 to 27 million tons.
2) Achieve 50 special steel structure manufacturing enterprises, 200 at the first level, and 1000 at the second and third levels. The production and processing capacity is 3,000 to 40 million tons. Focus on the promotion of light steel structure, large-span space structure, high-rise steel structure, steel-concrete composite structure, steel structure residential.
Promoting steel-structured houses is one of the ways to industrialize residential construction. It is estimated that China's urbanization level will reach 40-50% in 2010, urban population will increase to more than 600 million, and new buildings of about 2 billion square meters will be added each year, such as 10 % adopts steel structure and consumes 12 million tons of steel. It is suggested that the industry should take the lead in setting up a steel structure residential promotion center, joint construction, design, construction, and supporting materials production units to carry out project pilots and gradually increase the proportion of steel structure housing.
3) Optimizing and perfecting the industrial chain is the only way to accelerate the development of the steel structure industry. It is necessary to further improve the design level of steel structure companies and increase investment in research and development.
Strengthen the detailed management of the steel structure and deepen the design of the steel structure. Through the setting and review of the detailed qualification of the steel structure, support enterprises with high technical quality and high social credibility, and eliminate inferior enterprises. Comprehensively improve the technical quality of the detailed steel structure market, maintain market order, and eliminate vicious competition.
4) In the field of steel structural fittings, materials and processing equipment, enterprises are encouraged to aim at the advanced level at home and abroad according to the development of the steel structure industry, develop new technologies, new processes and new materials, reduce costs and promote the development of the industry.
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