Earthquake Resilience of Rural Brick Prefabricated Panel Houses

Rural brick prefabricated panel houses generally perform poorly in earthquakes, with seismic resistance lower than that of reinforced cast-in-place houses.

Seismic Performance Characteristics

Prefabricated panel houses have poor overall integrity, with a structure similar to assembling building blocks. During an earthquake, the floor panels are prone to swaying left and right, and the gaps between panels gradually widen, ultimately leading to panel detachment and the collapse of the entire house. For example, during the magnitude 5.2 earthquake that struck Liuzhou, Guangxi, on May 18, 2026, prefabricated panel houses collapsed, while fully cast-in-place houses remained largely stable with no significant impact.

Influencing Factors

• Age Factor: Houses built before the 1980s have limited seismic resistance due to lower seismic standards at the time, typically capable of withstanding only up to a magnitude 6 earthquake at best. Over time, as the house structure ages, its seismic performance further declines.
• Structural Factor: Brick-concrete structures have relatively brittle walls that are prone to cracking under seismic forces, whereas frame structures perform better and can better withstand seismic forces. Additionally, the quality of foundation construction affects the house's seismic resistance; houses with deeper foundations or piles are less likely to collapse during shaking.
• Reinforcement Measures: Seismic performance can be improved by implementing reinforcement measures. For example, adding steel bars to walls, installing steel frames or pouring concrete within walls, laying steel mesh at joints, installing seismic isolation bearings, and applying high-ductility cement to walls can all enhance the house's overall integrity and seismic resistance.

Earthquake Safety Tips

• Choose Safe Locations: When shaking begins, prioritize moving away from exterior walls and avoid staying in open areas of the main hall. Immediately transfer to relatively safe locations such as the corners formed by load-bearing columns inside the house or the corners of load-bearing walls in the kitchen; for single-story houses, quickly hide under a sturdy solid wood dining table and protect your head and neck.
• Avoid Dangerous Areas: Steer clear of areas beneath roof prefabricated panels and under eaves corridors. Since the joints of prefabricated panels in self-built houses from earlier years are mostly unreinforced, they are prone to breaking and falling during strong earthquakes; eaves, canopies, and enclosing walls lack seismic structures and can collapse entirely during shaking, making these areas extremely dangerous.