The status quo and future development trend of steel structure building
(Zhejiang Shuren University, Hangzhou 310015, China)
Abstract: With the continuous improvement of people's quality of life and the increasing population, the demand for housing is increasing, which promotes the rapid development of the construction industry. Steel structure construction is a new type of building based on the development needs of modern architecture. Because of its many advantages, it has been widely used and has broad development prospects. Therefore, it is very important to discuss the development trend of steel structure construction. The article starts from the development status of China's steel structure construction, and looks forward to the current situation and future development trend of steel structure construction in terms of the application scope, advantages and disadvantages, development measures and development trends of steel structure construction.
Key words: steel structure construction; development status; application range; advantages and disadvantages; measures; development trend
At present, due to many reasons, the development of China's steel structure is still subject to some restrictions, but with the development of social economy, the development trend of steel structure must be rising. With the wide application of steel structure construction, the defects in the development of China's steel structure construction have gradually exposed, which has brought serious adverse effects to the development of China's steel structure. Therefore, the article analyzes and discusses the development status of steel structure in China, the application scope of steel structure, the advantages and disadvantages of steel structure, the measures to promote the development of steel structure and the development trend of steel structure.
1. Development status of China's steel structure construction
The development of China's steel structure is later than that of developed countries, and the application of steel structure is lagging behind with developed countries. Because the construction cost of steel structure is slightly higher than that of concrete building, and the steel structure itself has certain defects, which limits the development and application of steel building construction to a certain extent, China's steel structure is mainly used for large high-rise buildings. And in public buildings, less used in small residential buildings.
With the rapid development of the economy of Fengshihui, the market demand for steel structure buildings is also increasing. Especially in recent years, China's steel structure has been rapidly developed and actively applied. Many large-scale buildings have been built in first-tier cities in China. The steel building structure, the most typical of which is the Bird's Nest Stadium in Beijing. According to relevant statistics, the application ratio of China's steel structure construction still has a significant gap with the developed countries, but the upside is large. It is expected that the steel structure output will increase rapidly in the next few years. For the time being, China's steel structure buildings are still mainly used in large-scale high-rise buildings and public buildings. The south of public buildings will not be affected by real estate regulation, and the price of steel structure will not fluctuate greatly, which makes steel Structural production enterprises and steel structure construction enterprises will benefit from further promoting the development of steel structure construction.
2. Steel structure construction application range
2.1 Large-span structure building
The span of the building structure is closely related to its own weight. The larger the span, the greater the proportion of the self-weight in the load. Since the span of the building structure is difficult to change, it can only be started from the weight of the building structure, by reducing the building structure. By weight, you can get better economic results. The steel structure has many advantages such as high strength and light structure, so it is very suitable for use in large-span buildings. Common long-span steel structures include bridges, stadiums, convention centers, and large warehouses. The structural system of large-span steel structures includes frames, grids, arches, composite structures and suspension cables. At present, China's completed large-span steel structure buildings include the Beijing Bird's Nest Gymnasium, the Xiangxi Aizhai Bridge, the Great Hall of the People, and the National Grand Theatre.
2.2 Industrial plant
As the name suggests, industrial plants are mainly used for industrial production activities. Compared with ordinary buildings, industrial plants are taller and wider, and there are usually large cranes in industrial plants. The steel structure has high building strength, good toughness and plasticity. Compared with concrete structure, the steel structure has better expansion and height in width and width, so it is very suitable for industrial plants. In recent years, steel structures have been widely used in industrial plants. China has built steel structure factory buildings such as Wuhan Iron and Steel Company Plant and FAW Volkswagen Company Plant.
2.3 high-rise buildings
The high-rise structure mainly refers to a structure with a high height and a small planar size, and a tower structure has a power transmission tower, a television tower, a signal tower, a drilling tower, and the like. Because the steel structure has the advantages of convenient construction, good economy and strong wind load resistance, it is very suitable for high-rise buildings. At present, China's already completed steel structure towering buildings include the Shanghai Oriental Pearl TV Tower and the Beijing Environmental Meteorological Monitoring Tower.
2.4 single or multi-storey residential
With the rapid growth of China's population, the demand for housing and housing is also increasing. Compared with other structures, single or multi-storey residential buildings with steel structure have better steel quality and convenient room layout changes. Advantage. At present, China's already completed single-story or multi-story steel structure houses include 8-story steel structure residential buildings of Changsha Yuanda Company and 8-storey steel structure residential buildings of Shanghai Beicai.
2.5 high-rise and super high-rise buildings
High-rise and super-tall buildings are very large due to excessive floor and high building height, so they are greatly affected by factors such as dead weight, seismic load and wind load. The steel structure has the advantages of high bearing capacity, light weight, etc., combined with short manufacturing time and convenient construction, it is very suitable for high-rise and super high-rise buildings. At present, China's already completed steel structure high-rise and super high-rise buildings include Shanghai Jinmao Tower, Shenzhen Baoan International Airport, Shenzhen Development Center, and Beijing International Trade Center.
3. Advantages and disadvantages of steel structure construction
3.1 Advantages of steel structure construction
First, the earthquake resistance is good and the weight is light. The steel structure is mainly made of high-strength steel. Compared with concrete, the weight of the steel is lighter, but the load-bearing capacity is strong, and the tensile and shear properties are also high with concrete, plus good toughness. Plasticity makes the seismic performance of steel structures also good.
Second, the construction period is short and the construction is convenient. The steel structure is simple and fast to manufacture. It only needs to be cut and welded in strict accordance with the requirements of the architectural design drawings. Then it is transported to the construction site by the transport vehicle. Finally, the relevant mechanical equipment is used to take the force of lifting and splicing to weld the steel into a whole. The degree of mechanization in the process is very high, which makes the construction period shorter and the construction is more convenient.
Third, the functional interval arrangement is more reasonable and convenient. Compared with concrete, the steel structure can be cut freely according to the design drawings, thus forming a completely new structure. The improvement of people's quality of life has become more and more demanding on the appearance and function of the building. The advantage of the functional arrangement of the steel structure is more reasonable and convenient, which effectively meets the needs of people for the appearance and function of the building.
Fourth, the economy is good. The steel structure is light in weight, convenient in transportation and lifting, saving time and reducing the corresponding cost. Since the steel structure has a small load on the building foundation due to its own weight, which reduces the construction cost of the building, the economic advantages of the steel building are obvious.
3.2 defects in steel building structure
First, the construction process is complicated. Steel structure construction has the defects of complicated construction procedures, mainly reflected in the welding of steel structures. Steel of steel structure construction all need to be welded. However, there are many factors affecting steel welding. If the steel is improperly welded, welding cracks may occur, which seriously affects the quality and safety of steel structure construction.
Second, the fire prevention capability is weak. The steel construction materials are mainly steel. Although these steels are fire-treated when they are made into steel structures, their fire resistance is still weak, which is not as good as the fire resistance of traditional concrete structures.
Third, the technology is not perfect. At present, although China's steel structure construction has been rapidly developed, there are still some deficiencies in the technical level, which are not perfect. Mainly reflected in the details of steel structure processing, such as the steel structure supporting connectors and maintenance materials are not complete, the performance is weak, which restricts the development of steel structure to a certain extent.
4. Measures to promote the development of China's steel structure
4.1 Strengthening policies and guiding government policy guidance is an important way to promote the development of steel structure construction
On the basis of fully understanding the development and application of China's steel structure construction, the government construction department in charge should strengthen policy guidance, scientifically formulate a unified steel structure construction development plan, and strictly implement it. Scientifically formulate and continually revise relevant technical standards and norms and regulations, so as to standardize the steel structure construction market, so that there are laws to follow and rules to follow. At the same time, the government should formulate relevant policies, actively encourage and vigorously support the development of steel structure construction.
4.2 Strengthen professional talent training
Steel structure construction is a technically demanding and complex structure, which puts higher requirements on steel structure construction personnel. In the past, China's building structure was dominated by concrete structures and masonry structures, while China's steel structure buildings developed late, so people's familiarity with traditional building structures is far better than steel structure buildings. This has led to the lack of familiarity and understanding of steel structures by professionals, and is not qualified for steel construction. In addition, at present, the teaching focus of major universities in China is still placed on concrete structures and masonry structures. The teaching content and courses of steel structures are few, and the knowledge of steel structure textbooks is old, lacking cutting-edge knowledge and technology, which in turn makes Chinese colleges and universities train The talent is not conducive to the development of steel structures. Therefore, it is very necessary to strengthen the cultivation of professional talents. Major universities in China should change their teaching concepts, attach importance to steel structure teaching, increase the length of steel structure teaching courses, introduce cutting-edge knowledge and technology into the content of teaching materials, and improve the understanding of steel structures by professionals to promote the development of steel structure in China.
4.3 Strengthening industry management
With the rapid development and wide application of steel structure construction, the steel structure market has been continuously expanded, and steel structure production and installation enterprises have emerged in large numbers. Currently, there are large-scale enterprises with strong strength in the steel structure market, and there are also many small private contractors. The workshop not only exacerbated the fierce competition in the market, but also made the steel structure industry level uneven. Therefore, the national government departments must pay attention to this situation and strengthen the management of the steel structure industry, so as to improve the overall level of the steel structure industry and ensure the healthy and orderly development of the industry.
5. Development trend of steel structure building
5.1 Diversification and standardization of materials
At present, the rapid development of the construction industry and the improvement of people's quality of life have become more and more demanding on the appearance and function of buildings. The steel of steel structure construction largely affects the development of steel structure construction. Therefore, in order to promote steel structure and building development, its development trend must also be toward the diversification and standardization of materials. At this stage, China has mastered most of the steel production technology, many types of steel can be produced independently, and the steel performance is not inferior to developed countries.
5.2 Specialization in design, production and construction +
With the development of science and technology, the production of steel structures has been realized in batches, which helps to promote the development of steel structures. At the same time, in order to better meet the development and application of steel structure, it is an inevitable trend to realize the specialization of steel structure design, production and construction. At present, some steel structure enterprises in China are strong in strength and large in scale. They have introduced international advanced technology and facilities, and have a production team with high professional level and mature technology. At the same time, various professional departments related to steel structure construction have been established. The development of China's steel structure has laid a solid foundation. It can be foreseen that in the near future, the social division of labor must be more and more refined, which requires steel structures to embark on a specialization path in order to obtain better development opportunities.
5.3 To green environmental protection and energy saving development
With the increasing energy and environmental crisis, the concept of green environmental protection and energy conservation is strongly advocated, people's quality of life is continuously improved, energy conservation and environmental protection awareness are constantly enhanced, and steel structure construction is bound to develop in the direction of green environmental protection and energy conservation. In this way, the sustainable development of steel structure construction is realized. Steel is the main material of steel structure construction, and it belongs to materials that can be recycled and reused. Moreover, the construction of steel structure will not cause pollution to the surrounding environment. It can be seen that the development trend of steel structure fully meets the requirements of environmental protection and energy conservation.
5.4 Development of industrialization of steel structure housing
Steel-framed homes are a major change in the construction and residential sectors. In the developed countries, steel structures have been widely used in various residential buildings, and due to various restrictions, the application of steel structures in China is not extensive, but it is obvious that steel houses will be widely used in China, and gradually Towards the direction of industrialization.
All in all, steel structure has many advantages. The wide application of steel structure construction is of great significance for China to achieve an environment-friendly and resource-saving society. Although the current development and application of steel structure in China due to various restrictions Compared with developed countries, there is still a certain gap, but it is believed that after unremitting efforts and active development and progress, China's steel structure will surely usher in rapid and sustainable development.