Concrete-Reinforced Prefabricated Panel House
A concrete-reinforced prefabricated panel house is a type of building constructed primarily using prefabricated panels. These panels are cement components prefabricated in factories, formed by nailing wooden models, arranging steel bars, and pouring cement. They come in two types: solid and hollow.
Origin and Historical Applications: This building form originated in the early 20th century and was widely used in residential construction in China before 1985. This construction method had the advantages of fast construction speed and relatively low cost at the time, meeting the demand for a large number of housing units.
Existing Issues: Existing prefabricated panel houses generally have some notable problems. Weak earthquake resistance is a prominent issue. Due to limitations in early design and construction standards, their structures have poor resistance when facing natural disasters such as earthquakes, making them prone to damage or even collapse. Poor sound and thermal insulation is also a common problem. The connections between prefabricated panels are not tight enough, allowing sound and heat to transfer easily, affecting the comfort of living. Additionally, their service life is approximately 30-50 years, and as time passes, the structure and performance of the house gradually decline.
Policy Orientation: In view of the above issues, some regions have initiated demolition work. However, since 2022, China has implemented a policy of urban renewal, which has changed the approach to handling prefabricated panel houses. The focus is now on repair and renovation, with only buildings that meet the criteria for dangerous structures being demolished. This policy aims to conserve resources and enhance the usability of houses while ensuring the safety of residents.
New Components and Standards: In the field of prefabricated construction, many new components and standard designs have emerged. For example, prefabricated reinforced concrete floor connection structures and truss-reinforced concrete composite panels have significantly improved performance and can better meet the needs of modern construction. At the same time, relevant production processes show that an innovative diagonal bracing steel structure, tested by the National Earthquake Research Institute, has more than five times the earthquake resistance of conventional buildings, providing new ideas and technical support for improving building earthquake resistance.
