General Situation of Industrialization Development of Steel Structure Buildings in China
China steel structure The development of building industrialization began in the 1950s. It was proposed to learn from the experience of the former Soviet Union and Eastern European countries, implement standardization, and China's industrialization and mechanized prefabricated components and prefabricated buildings.
From the 1960s to the 1980s, it was assembled in China steel structure During the period of continuous development of architecture, especially since the late 1970s, various prefabricated building systems have developed rapidly in China. For example, low carbon cold drawn steel wire prestressed concrete circular orifice plate is widely used in multi-storey residential buildings with brick concrete structure. The amount of steel used per square meter of floor is only 3-6kg, and no formwork is required for construction. The installation can be completed with simple equipment or even manual work, and the construction speed is fast.
At the same time, the production process of prestressed concrete round orifice plate is simple, and the production lines are all over the country. Since the late 1970s, in order to meet the development needs of high-rise residential construction in Beijing, the prefabricated large plate residential system has been introduced from Eastern Europe. The internal and external wall panels and floor slabs are prefabricated into concrete slabs in the prefabrication plant. Site assembly passed. Formwork and support are not required during construction. The construction speed was fast, which effectively solved the problem of high-rise residential construction at that time. In order to meet the needs of high-rise residential construction, a large number of high-rise residential buildings with 10-13 floors in Beijing used prefabricated large slab systems, some of which have even been applied to high-rise residential buildings with 18 floors. By 1986, the total area of prefabricated high-rise residential buildings in Beijing was nearly 700000 square meters.
In the construction of multi-storey office buildings, prefabricated frames are used steel structure System. The frame beam is precast basket beam, the column is cast-in-place column, and the floor slab is precast prestressed hollow slab. Precast concrete bent structure system was widely used in single-layer industrial plants at that time.
steel structure The members are precast concrete bent frame, precast prestressed concrete crane beam, precast post tensioned prestressed concrete roof truss and prestressed roof slab. According to relevant documents, by the end of the 1980s, there had been tens of thousands of concrete prefabrication plants in China, with an annual output of 25 million m3. During this period, these prefabricated component systems have been widely applied and recognized, and a large number of prefabricated components have been standardized and have a standard atlas.
steel structure The design unit selected according to the standard atlas in engineering design, the prefabricated component processing unit produced and processed according to the standard atlas, and the construction unit purchased according to the standard atlas.
