High-rise Prefabricated Concrete House Structure

The high-rise prefabricated concrete house structure takes prefabricated reinforced concrete technology as its core, achieving efficient construction through factory prefabrication and on-site assembly. However, high-rise applications must strictly adhere to seismic and connection specifications.

1. Material and Strength Advantages

High-rise prefabricated concrete houses use C30-C40 grade concrete with embedded φ8-φ12 steel reinforcement mesh, achieving a compressive strength of 25-30 MPa, which is 1.5 times that of traditional brick-and-mortar structures. This high-strength material ensures structural stability under high-rise loads, while the uniform distribution of the steel mesh enhances crack resistance and extends the building's service life.

2. Modular Design and Connection Technology

Core components (such as walls, floors, beams, and columns) are cast in one piece using high-precision molds, integrating insulation layers, waterproofing layers, and pre-installed piping to reduce on-site construction steps. Modules are connected using prestressed bolts and welded steel plates, forming an integrated framework that ensures clear load paths and avoids local stress concentrations. For example, the connection nodes between walls and floors require precise bolt pre-tension control to prevent loosening.

3. Seismic and Wind Resistance Performance

This structure has a wind resistance rating of Class 10 and a seismic design intensity of 7 degrees (equivalent to the destructive force of the Wenchuan earthquake), meeting the safety requirements for high-rise buildings. Its seismic performance relies on two key designs:

• Shear Wall System: Distributes seismic forces through vertical components to reduce structural deformation;
• Frame-Shear Wall Collaboration: The frame provides horizontal stiffness, while the shear walls enhance lateral resistance, working together to resist seismic waves.

4. Floor Structure Specification Restrictions

According to the Technical Specification for Concrete Structures of High-rise Buildings (JGJ 3-2002):

• For buildings taller than 50 meters, complex high-rise structures (such as frame-shear wall and tube structures) must adopt cast-in-place floor structures to ensure integrity;
• For frame-shear wall structures with seismic designs of 6-7 degrees, prefabricated integrated floors can be used, but a cast-in-place layer (thickness ≥ 50 mm) must be provided, meeting reinforcement ratio requirements (e.g., bidirectional reinforcement with a diameter ≥ 8 mm) to avoid connection failures between the floor and vertical components.

5. Application Scenarios and High-rise Restrictions

Concrete house modules can achieve flexible layouts through horizontal splicing and vertical stacking (up to 3 floors), suitable for rural self-built houses, commercial spaces, and cultural tourism projects. However, high-rise buildings (e.g., taller than 50 meters) must incorporate cast-in-place or prefabricated integrated floor technologies and strictly adhere to seismic and connection specifications. Otherwise, insufficient structural integrity may lead to safety hazards.

Summary: The high-rise prefabricated concrete house structure combines industrial production with modular assembly, balancing efficiency and performance. However, its high-rise applications must be guided by specifications, focusing on solving issues related to floor integrity, connection reliability, and seismic design.