Monolithic Prefabricated Earthquake-Resistant Housing

Monolithic prefabricated earthquake-resistant housing utilizes reinforced concrete prefabricated modules, offering high seismic performance, but requires tailored design based on the region.

Seismic Performance and Design Features

The core structure of monolithic prefabricated earthquake-resistant housing consists of reinforced concrete prefabricated modules. For example, prefabricated cement houses employ a "full-frame shear wall" design, using national standard threaded steel bars to form the framework, combined with C35 concrete for monolithic pouring. Each module can weigh over 20 tons, with wall thicknesses ranging from 150-200mm and floor slab thickness of 120mm, creating a high-strength, high-stiffness structural system. Tested by professional institutions, its designed seismic fortification intensity is 7 degrees, capable of withstanding magnitude 8 earthquakes, with wall crack widths controlled within 0.2mm and no damage to the main structure. This performance stems from the integrity of the modular design, effectively dispersing seismic energy through the synergy of steel bars and concrete, reducing the risk of localized damage.

Criticality of Modular Connections

The core technology of modular construction lies in assembly connections. If the splicing points are reasonably designed and properly handled (e.g., using high-strength bolts, welding, or grouting connections), structural integrity can be ensured, meeting building functional requirements. However, compared to cast-in-place houses, the seismic performance of prefabricated houses may be slightly weaker, particularly prone to stress concentration or deformation incompatibility at connections. For instance, insufficient steel bar anchoring or inadequate concrete pouring at joints may lead to connection failure during earthquakes, affecting overall stability. Therefore, in earthquake zones or high-intensity areas, special seismic analysis of connection joints is necessary, optimizing structural measures (e.g., adding energy dissipation devices, reinforcing joint reinforcement) and strictly adhering to seismic design code parameters.

Applicable Scenarios and Advantages

Monolithic prefabricated houses can meet conventional seismic requirements in non-earthquake zones, offering significant advantages:

• High Construction Efficiency: Modules are prefabricated in factories and assembled on-site, with a 100㎡ house requiring only 1 day for complete installation, reducing construction time by 90% compared to traditional methods;
• Low Cost: Industrial production reduces labor and material waste, lowering overall costs;
• Superior Environmental Performance: Construction waste is reduced by 90%, and modules are recyclable, aligning with green building trends.

Summary and Recommendations

Monolithic prefabricated earthquake-resistant housing achieves high seismic capacity through modular design and reinforced concrete integrity, but requires optimized connection joint design based on seismic risk levels. It can be prioritized for promotion in non-earthquake zones, while in earthquake zones, it should be combined with seismic fortification intensity, site conditions, and other factors, verified through structural calculations and tests to ensure safety. Additionally, construction quality control (e.g., module precision, connection density) is crucial for ensuring seismic performance and requires strict supervision.