An alternative to traditional concrete buildings, steel structure buildings have excellent performance

Compared with traditional concrete building forms, steel structure buildings have three characteristics of 'high, large and light

In addition, the steel structure has the following superior performance characteristics:

1. The steel structure is light in weight

2. The occupied area is small and the space utilization rate is high

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3. Good ductility and excellent seismic performance

4. High construction efficiency, which can be increased by 3 times.

5. Energy saving and environmental protection, which can effectively reduce the amount of construction waste, The steel is 100% recyclable, in line with the concept of sustainable development.

Therefore, it is generally believed that steel structure buildings will be an alternative to traditional concrete buildings.

Non-residential steel structure buildings

It is still expected to achieve a growth rate not lower than GDP in the future

According to the different scales of steel structure engineering projects in my country in 2018 According to the analysis of the proportion of building types, in the downstream demand for steel structures, commercial real estate accounts for 35%, venues for 23%, and workshops for 18%, while residential buildings account for only about 5% of the entire steel structure project, schools and hospitals, etc. The field is only 1%, and the proportion of schools, hospitals and residential fields is still relatively low. It is conservatively expected that the proportion in 2020 will be basically similar to that in 2019.

Professionals believe that the use of steel structures in commercial real estate and venues is relatively mature at present, and residential, schools and hospitals may become the next 'main battlefield' for the development of steel structures.

The steel structure in the residential sector is expected to contribute to the output of the industry

According to the 'Opinions on Vigorously Developing Steel Structure Buildings (Draft for Comments)' and various recent industry policies, it can be seen that at present The prefabricated buildings vigorously promoted by the Ministry of Housing and Urban-Rural Development actually mainly refer to prefabricated houses, that is, to increase the proportion of prefabricated houses in newly built houses.

At present, the acceptance of steel structures by ordinary people is low, so the penetration rate of steel structure residential buildings is only about 3%. There are two main reasons:

1. Ordinary people do not have enough knowledge about the performance and advantages of steel structure houses, and there are still some misunderstandings

The designers of traditional Chinese architectural design institutes lack in-depth understanding of many characteristics of steel structure houses, and it is easy to Based on the concept of traditional concrete houses, simply replacing reinforced concrete members with steel members makes the advantages of steel structure houses not fully exerted.

However, designers have an intuitive misunderstanding of the fire resistance and anti-corrosion performance of steel structure houses. They often reject the steel structure house plan at the stage of determining the house plan, and prefer to choose the traditional concrete house plan. Conservative.

2. Insufficient understanding of the comprehensive benefits of steel structure residential buildings

Consumers and developers are more willing to accept lower-cost traditional concrete and brick-concrete residential buildings. The comprehensive cost of the life cycle, including design cost, procurement cost, labor cost, capital turnover, effective area utilization rate, environmental and ecological benefits and other cost elements, lacks rational analysis and understanding, which greatly limits the market promotion of steel structure housing.

Bridging steel structure housing ushered in a rising period

Entering 2019, policies related to steel structure housing have been strengthened, and policy inclination is a major change at the industry level.

Steel structure prefabricated buildings have the advantages of superior seismic performance, convenient construction, flexible layout, light weight and high strength, and green environmental protection. Under the superposition of multiple favorable policies, prefabricated steel structure buildings will usher in a new opportunity for development.

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