What are the advantages and disadvantages of cement building and steel structure building?

Advantages and disadvantages of steel structure building At present, the residential structure in China is still mainly brick-concrete structure and reinforced concrete frame structure, and the industrial system of steel structure residential building has just started in China. With the development of housing industrialization, many advantages of light steel structure housing provide a stage for light steel structure housing. 1. Steel with light weight and good seismic performance has ductility, which can better consume the energy brought by the earthquake, so it has good seismic performance and high structural safety. The material is an ideal elastomer with good uniformity and isotropy, which is most in line with the basic assumptions of general engineering mechanics. Light steel structure is light in weight, and the space utilization rate of light steel structure residence is high on the same building floor. In terms of space utilization. Steel structure has a small cross section, which can increase the effective building area by about 8% compared with reinforced concrete structure. The architectural style of steel structure is also more flexible and rich, and the indoor space can be divided into various schemes to meet the needs of different users. 2. The construction of steel structure members is convenient, the construction period is short, and it can be widely fabricated and installed on site. Due to the small amount of field work, little pollution to the surrounding environment and high degree of construction mechanization, the construction speed is accelerated. According to statistics, compared with concrete structure, steel structure can shorten the construction period 1/3 and save formwork materials. 3. The comprehensive cost is low, the dead weight is light, the basic cost is reduced, the overall material is reduced, the direct cost is reduced, and the construction period is short, so the indirect cost can be reduced, so the comprehensive cost is low. 4. The sustainable development of light steel structure has a high degree of industrialization, which is suitable for mass production in factories. It integrates advanced products such as energy saving, waterproof, thermal insulation, doors and windows, and applies them in a complete set, integrating design, production and construction to improve the level of residential industrialization. Steel can be recycled after being scrapped, and steel structure building is a green building, which is a new architectural form adapted to China's sustainable development strategy. However, at present, there are also some shortcomings in steel structure residence: although steel structure residence has many advantages, China is in the early stage of development and there are still many problems to be solved. In terms of seismic mechanical properties, pure steel structure is not suitable for high-rise residential buildings. Because of the same bearing capacity, its cross section is relatively small, its stiffness is relatively reduced, which will bring a sense of instability and require higher floors and supports. Light steel structure houses have certain requirements for architectural design and pipeline layout. Once the room type and architectural shape are determined, they cannot be rebuilt and repaired like traditional houses. Poor fire resistance and corrosion resistance. Due to the imperfect thermal insulation system, the cost is higher than that of concrete houses.