Integrity of Prefabricated Panel Houses

The integrity of prefabricated panel houses is relatively poor, mainly reflected in loose structural connections, a lack of rigid frameworks, and weak seismic performance.

Loose Structural Connections, Inherent Deficiency in Integrity

Prefabricated panel houses are constructed using prefabricated panels as the main components. During production, wooden models are nailed together, steel bars are arranged, and cement is poured to form the panels. This construction method determines that there are inherent deficiencies in the integrity of these houses, much like building a house with building blocks. The prefabricated panels are stacked one on top of the other, and there is a lack of effective connection and integration among the components, failing to form a tightly integrated overall structure. The prefabricated panels are relatively independent of each other. When subjected to external forces, they are difficult to bear the load together, making them prone to local damage, which in turn affects the overall structural safety.

Lack of Rigid Framework, Stability Dependent on Foundation Conditions

There is only simple overlapping between the prefabricated panels and the walls, and simple filling between the panels themselves, without the installation of ring beams and structural columns. Ring beams and structural columns play a crucial role in building structures. They can enhance the overall rigidity and stability of the building, forming a rigid framework that effectively resists adverse factors such as foundation settlement and wall cracking. However, prefabricated panel houses lack these key structural elements. Without the support of a rigid framework, once the foundation settles slightly or the walls develop minor cracks, the prefabricated panels will shift and loosen, seriously affecting the overall stability of the house.

Weak Seismic Performance, High Risk of Collapse

When subjected to horizontal forces such as earthquakes and shaking, the floor slabs and walls of prefabricated panel houses can separate instantly. Due to their loose structural connections and a lack of effective seismic measures, under the action of an earthquake, the house does not gradually deteriorate but rather collapses suddenly, without any warning of cracks or time for deformation buffering. This sudden collapse poses a great threat to the lives of the occupants. Compared with buildings with good integrity and seismic performance, the survival rate of prefabricated panel houses in earthquakes and other disasters is much lower.