One-Story Prefabricated Panel House Structure

The one-story prefabricated panel house structure is constructed mainly using prefabricated panels, mostly in a brick-and-concrete structure, with relatively low overall stiffness.

Structural Form and Component Characteristics

The structural form of one-story prefabricated panel houses is primarily brick-and-concrete. The floor slabs are made of prefabricated concrete panels, and the walls are mostly load-bearing brick walls. Prefabricated panels are cement components manufactured in factories. During production, a wooden model is first nailed together, then steel bars are arranged and cement is poured to form the panels, which come in solid and hollow types. This structural form was relatively common in early buildings due to its relatively simple construction and lower cost.

Performance Characteristics

Prefabricated panels are usually produced in a standardized manner, which enables faster construction speeds and allows for the completion of house construction within a relatively short period. However, they also have some performance deficiencies. At the connections, there may be weak points between the prefabricated panels, which can affect the overall structural stiffness and seismic performance. Meanwhile, existing prefabricated panel houses generally have weak seismic resistance. In the event of natural disasters such as earthquakes, the safety of the houses is difficult to fully guarantee. Additionally, their sound insulation and thermal insulation effects are poor, resulting in low living comfort. Moreover, their service life is approximately 30 - 50 years, and as time goes by, various aging problems may occur in the houses.

Governance and Renovation Policies

The 2026 policy emphasizes that the governance and renovation of prefabricated panel houses should be the main approach, and only buildings that meet the criteria for dangerous houses should be demolished. According to the Standard for Dangerous House Appraisal (JGJ 125 - 2016), houses are classified into four grades: A, B, C, and D. Among them, Grade C houses have some load-bearing structures that do not meet safety requirements and are partially dangerous. For such houses, measures such as repair and reinforcement, reconstruction, or renovation, as well as original-site reconstruction, can be taken. Grade D houses have severely damaged load-bearing structures and are overall dangerous. For such houses, they should be demolished as much as possible to safeguard the lives and property of residents.