Seismic Reinforcement of Prefabricated Structural Houses

There are various methods for seismic reinforcement of prefabricated structural houses, and an appropriate plan can be selected based on the actual situation of the house, as follows:

Foundation Reinforcement

Methods such as increasing the foundation size, deepening the foundation, and installing steel reinforcement meshes are employed to enhance the load-bearing capacity of the foundation. Additionally, reinforcing agents or foundation sealing materials can be added to improve the foundation's seismic resistance. For example, for houses with insufficient foundation bearing capacity, expanding the foundation base area allows for more uniform transfer of upper loads to the foundation, reducing the risk of uneven settlement.

Structural Reinforcement

• Reinforcement of Key Components: Steel beams, columns, and plates are installed at key locations such as walls, stairs, and roofs to increase the overall strength and stiffness of the house. Alternatively, reinforced concrete can be injected into the walls to enhance their seismic resistance.
• Steel Structure Reinforcement: The overall rigidity and ductility are enhanced by adding steel frames or reinforced concrete walls.
• Floor Reinforcement: Concrete is poured or steel reinforcement meshes are laid at the joints of prefabricated panels to improve the overall integrity of the floor and prevent damage due to weak joints during earthquakes.

Frame Reinforcement

Metal frames are installed on the exterior walls of the house to increase its overall strength and stability. Reinforcing agents or sealing materials can also be added to the frame structure to improve its seismic resistance.

Isolation Reinforcement

Isolation devices such as spring isolators and rubber isolators are incorporated into the foundation or structure of prefabricated panel houses. These devices effectively reduce the horizontal and vertical seismic forces generated by earthquakes, minimizing house vibrations and protecting the structural integrity from severe damage.

Other Reinforcement Methods

• Steel Bar Reinforcement: Key parts of the house, such as walls, stairs, and beams and columns, are reinforced by adding steel bars to enhance the overall strength and stability of the house.
• Increasing Floor Section Reinforcement: A reinforced concrete adhesive layer not less than 40 mm thick is added to the surface and bottom of the prefabricated floor to improve its load-bearing capacity.
• Bonding Reinforcement: Carbon fiber sheets are bonded to the tensioned parts of the prefabricated floor in the direction of the floor, with anchor points set at the top. Alternatively, steel plates are bonded to walls or floors to increase their load-bearing capacity and stability, suitable for situations where walls or floors have cracks or deformations.
• Grouting and Steel Mesh Reinforcement: Grouting is performed in the walls or foundations of buildings, or steel meshes are laid on walls or floors to increase their overall strength and stability, improve seismic performance, and prevent deformation or cracks in the buildings.
• Adding Support Reinforcement: The walls or roofs of prefabricated panel buildings are reinforced by adding supports to improve the load-bearing capacity and stability of the buildings.