Wind Resistance of Prefabricated Houses

Prefabricated houses have strong wind resistance capabilities and can withstand typhoons of magnitude 12 (wind speeds of 32.7-36.9 m/s). Their wind resistance performance is primarily achieved through three aspects: structural design, material strength, and connection methods, as analyzed in detail below:

1. Structural Design: Full-frame Shear Wall System Provides Core Support
Prefabricated concrete houses adopt a 'full-frame shear wall' design, constructing a skeleton with national standard threaded steel bars to form a three-dimensional load-bearing system. This structure effectively disperses the horizontal thrust generated by wind loads, avoiding local stress concentration. For example, wall thicknesses reach 150-200 mm, and floor slab thicknesses are 120 mm, significantly exceeding those of ordinary brick-concrete structures and greatly enhancing overall rigidity. Similar designs are used in prefabricated concrete houses in rural areas of Henan, which have been practically verified to withstand typhoons of magnitude 12, demonstrating the reliability of this structure under extreme weather conditions.

2. Material Strength: High-grade Concrete and Steel Bars Work Together
The main body of prefabricated houses is cast as a whole using C35 concrete, with a compressive strength of 35 MPa, much higher than that of ordinary concrete (C20-C30). Combined with national standard threaded steel bars (HRB400 grade), a reinforced concrete composite structure is formed, ensuring both the shear resistance of the walls and avoiding brittle failure through the ductility of the steel bars. Each module weighs over 20 tons, further reducing wind-induced vibrations and ensuring the stability of the house in strong winds.

3. Connection Methods: Prestressed Bolts Ensure Reliable Fixation Between Modules
Modules are connected using prestressed bolts, which apply pre-tensioning forces through high-strength bolts, keeping the connection nodes in an elastic compression state. Professional agency tests show that under typhoons of magnitude 12, there is no loosening of the bolt connections, effectively preventing module separation. The roof waterproofing membrane is fixed with special pressure strips and employs hot-melt welding technology to ensure it is not lifted off in strong winds, preventing structural damage caused by rainwater leakage.

Practical Application Cases Support Wind Resistance Performance
Prefabricated concrete houses widely used in rural areas of Henan have withstood multiple typhoons of magnitude 12 in coastal regions prone to typhoons, without experiencing structural damage or connection failures. Testing data on prefabricated concrete houses also indicates that their wind resistance capabilities meet the design requirements for typhoons of magnitude 12 specified in the 'Building Structural Load Code' (GB 50009), ensuring safe use under extreme weather conditions.