Steel construction: looking for "just be" a breakthrough
Recently, the vice president of the China Iron and Steel Industry Association, Wang Qi announced a set of data, the construction of China's steel construction in the country as a whole, the proportion is less than 10%, while the proportion of the United States and other developed countries has reached more than 40%. For deep dilemma overcapacity and steel industry in terms of profit, the status of the low proportion of steel construction means there are thousands of tons of steel needs to be developed, and now to the time of the shot.
Arcade prospects
In recent years, the steel industry suffering from oversupply, excess production capacity bitter. In order to survive and develop, in addition to the elimination of backward production capacity, lowering the efficiency of work to do outside, the steel industry is an urgent need to develop a new growth point of the mall.
The steel structure steel will undoubtedly help alleviate the "Steel demand" sluggish. Data show that in 2012 China's annual output of about 35 million tons of steel, steel accounts for about 5 percent of steel production in the proportion of the year, but the latest data show that less than 10%, which indicates that the steel has infinite steel mall developer value.
"Foshan Steel production is mainly constructed of steel structures, and has many advantages compared to other structures." Associate Professor, Department of Civil Engineering, North China University jade star told the author, first, high-strength steel, plastic patience is good, with a strong seismic performance, capacity and ductility under dynamic loading, if to enhance the rational use of the available area of construction; secondly, light weight steel construction, site construction speed, can shorten the construction period; ultimately, the precise dimensions of steel components, easy to identify standard Standard, enabling the construction of large-scale construction, industry, quality is also easy to manipulate.
Deputy director of the China International Engineering consulting firm Development 陈子琦 metallurgy and building materials, said that the construction industry itself is a high energy-consuming industries, while steel has energy saving features.
The measure, if the industrial production of construction steel in our way of popularity, construction waste will decrease by approximately 83%, the data loss is reduced by approximately 60%, 60% increase in the recoverable data, the construction of energy-saving more than 50%.
Because of the many advantages of steel obtained the policy level support. State Council "to resolve the serious problem of excess production capacity guidance" focuses on efforts to develop the domestic market, the implementation of the use of steel in construction field. "Green construction moves plan" put forward to implement and suitable for industrial production of prefabricated concrete, steel and other construction system.
According to industry estimates, the "Twelve Five", China's steel amounted to about 50 million tons of steel; to "45" at the end of steel construction steel consumption may increase to 70 million tons. If we add synergistic force policy and industry experts expect steel consumption of steel will be exceeded 1 million tons.
Difficult to implement the use of
It is understood that the high level of domestic as well as the construction of large-span steel structure has been fully implemented, the Bird's Nest, Water Cube, the National Theatre is a masterpiece of steel, such as airport construction projects, major sports venues, such as high-end industrial plants, the use of steel structure is preferred. Overall, however, the use of steel in our implementation is not smooth, the proportion of the construction is far behind the developed countries, there are many reasons.
First, the cost of doubt end shopping disorder caused. Seiko Steel Group Chairman Fang Chaoyang said "Steel construction with traditional concrete construction cost of high-end products has come near, but relative to the more low-rise, multi-layered construction is still slightly higher than ordinary. High sensitivity for low prices shopping malls, the capital of doubt still affect their use of steel construction enthusiasm. "
Secondly, the production of steel companies can restrict. China's annual New Area infinity, and the current low steel construction standardized rates, the extent of use of the mall-style production orders for steel construction and mode of operation will be affected. Meanwhile, the lack of standardization is low resulting in supporting parts must technical standards, may be "inferior materials" and other questions.
Eventually, the idea of using steel has yet to be established. "For a long time, the construction of reinforced concrete structures using ingrained thinking, people do not understand steel, and some even feel the steel subject to rust out." Jade star believes that the concept of curing resulted in the current use of the owners, the adoption of planning, developers habits are more inclined concrete, and let the construction workers engaged in concrete work fine instead of steel work is also very difficult.
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