Is Prefabricated Panel House Safe in Earthquakes?
Prefabricated panel houses have relatively low earthquake safety. The specific reasons are as follows:
Low structural strength and poor earthquake resistance: Prefabricated panel houses are assembled from individual prefabricated panels. This structure inherently lacks robustness and toughness. Most prefabricated panels adopt a hollow design, and the quantity and distribution of steel bars are not as scientifically reasonable as those in cast-in-place houses. The overall structure is like a fragile skeleton. When encountering an earthquake disaster, its structural strength is difficult to withstand the impact of the earthquake. Even slight vibrations can cause the joints between the floor panels to loosen. Over time, cracks in the house will continuously increase and expand. In severe cases, the entire building may even collapse suddenly. For example, in some earthquake-prone areas, some prefabricated panel houses have suffered severe structural damage after earthquakes due to this structural characteristic.
Lower earthquake resistance than theoretical values: According to the "Code for Seismic Design of Buildings", the seismic intensity of earthquake-resistant houses is generally 6 - 7 degrees, and theoretically, they can withstand earthquakes of magnitude 6 - 7. However, there is no guarantee when facing earthquakes of magnitude 8 or above. The earthquake resistance of prefabricated panel houses is even worse. The connection methods between the prefabricated panels are easily damaged under external forces such as earthquakes, causing the prefabricated panels to fall off or the overall structure to become unbalanced. Especially for some old prefabricated panel buildings constructed a long time ago with aging materials and poor construction quality, their earthquake resistance may only reach the standard for earthquakes of magnitude 4 - 5. When an earthquake strikes, the safety of these houses will be greatly threatened.
Insufficient overall preventive measures: Prefabricated panel houses mainly rely on cement for construction. Although a certain amount of steel bars are added, their overall earthquake resistance cannot be compared with that of modern buildings. Modern buildings adopt various seismic technologies and measures during the design and construction process to improve the seismic performance of the houses. However, due to the structural characteristics and construction methods of prefabricated panel houses, when facing natural disasters such as earthquakes or floods, the safety preventive measures are clearly insufficient, making it difficult to effectively protect the lives of the occupants.
