Earthquake-Resistant Prefabricated Assembled House

Earthquake-resistant prefabricated assembled houses, through structural optimization and industrial production, possess high seismic performance, capable of withstanding magnitude 8 earthquakes (with a designed seismic fortification intensity of 7 degrees), with no damage to the main structure under strong earthquakes.

1. Structural Design: Core of Full-Frame Shear Wall System

Earthquake-resistant prefabricated assembled houses generally adopt a "full-frame shear wall" design. Taking prefabricated concrete houses as an example, their structural system is built with a skeleton constructed from Φ10-Φ14 national standard threaded steel bars, combined with C35 concrete poured as a whole, forming a high-strength load-bearing frame. The wall thickness ranges from 150-200mm, and the floor slab thickness reaches 120mm, with each module weighing over 20 tons. By increasing the structural cross-sectional dimensions and reinforcement ratio, the lateral force resistance capacity is significantly enhanced. The shear walls and frames work in synergy to effectively disperse seismic energy, preventing damage caused by localized stress concentrations.

2. Seismic Performance: Verified by Professional Testing

Tested by authoritative institutions, such houses can withstand magnitude 8 earthquakes (equivalent to the intensity of the Wenchuan earthquake), corresponding to a designed seismic fortification intensity of 7 degrees. In simulated strong earthquake tests, wall crack widths are strictly controlled within 0.2mm, with no damage to the main structure, indicating excellent ductility and energy dissipation capabilities. The modular design further enhances the overall structural integrity, with components connected via high-strength bolts or welding, ensuring uniform energy dispersion during seismic wave transmission and preventing collapse due to connection node failures.

3. Industrial Production: Enhancing Construction Efficiency and Quality Stability

Prefabricated assembled houses are produced through standardized factory manufacturing of building components (such as wall panels, floor slabs, and frame modules), which are then assembled on-site. The main types include:

• Panel-based Assembly: Using prefabricated wall panels and floor slabs as core components, assembled through wet connections (such as concrete pouring) or dry connections (such as bolt fixation);
• Box-based Assembly: Prefabricating functional units like bathrooms and kitchens into independent "boxes" for on-site assembly into a complete building;
• Frame-based Assembly: Utilizing prefabricated frame columns and beams as the main structure, paired with lightweight partition panels, achieving a 50%-70% increase in construction speed compared to traditional buildings.

Modular buildings, as a more integrated form, further reduce on-site wet operations through standardized interface designs, minimizing human construction errors' impact on seismic performance and ensuring structural stability.

4. Summary of Seismic Advantages

Earthquake-resistant prefabricated assembled houses achieve a dual improvement in seismic performance and construction efficiency through the application of high-strength materials, a full-frame shear wall system, modular connection technology, and industrial production quality control. Their design standards meet the requirements of high-intensity earthquake zones, making them suitable for residential buildings, schools, hospitals, and other structures with high safety demands.