Frame of Concrete Prefabricated Houses

The frame of a concrete prefabricated house is a structural system assembled with reinforced concrete beams, slabs, and columns as the load-bearing skeleton, combined with lightweight partition panels, and possesses various characteristics and advantages.

I. Frame Structure Basics and Prefabricated Construction Methods The frame structure consists of beams and columns forming a frame to bear the entire load of the building, with reinforced concrete beams, slabs, and columns as the load-bearing skeleton, combined with lightweight partition panels for assembly. In terms of construction methods, on-site pouring is generally more common for general frames. To accelerate project progress and save formwork and shoring, partial prefabrication (such as columns) and partial on-site pouring (such as beams), or on-site pouring of prefabricated column-beam joint connections can also be adopted. Cement houses (prefabricated reinforced concrete full-frame shear wall structure houses) adopt a factory prefabrication + on-site assembly model. In specialized production bases, core components such as walls, floor slabs, beams, and columns are poured and formed in one go using high-precision molds. Each module integrates multiple structures such as a steel reinforcement skeleton, insulation layer, waterproof layer, and pre-embedded pipelines, allowing for flexible combination like 'building blocks'.

II. Frame Characteristics

1. Load-Bearing and Stress: Residential frame structures are composed of load-bearing components such as beams, slabs, and columns. These components have relatively small cross-sections, resulting in lower load-bearing capacity and stiffness. Their stress characteristics are similar to those of vertical cantilever shear beams, with shear deformation being the primary mode. Inter-story displacement decreases as the floor level increases. In high-rise frames, significant horizontal forces are exerted in both the longitudinal and transverse directions. In such cases, the cast-in-place floor also acts as part of the beam to share the load.
2. Role of Walls: The walls in frame structures are infill walls that serve as enclosures and partitions. They generally do not bear loads and offer flexibility for renovation. Removing walls can alter the indoor space layout. The modules of cement houses are connected through pre-stressed bolts + welded steel plates to form an integral frame, with a wind resistance rating of Level 10 and a seismic fortification intensity of 7 degrees (equivalent to the destructive force of the Wenchuan earthquake).
3. Advantages: They provide flexible usage space for buildings; many components can be prefabricated in factories and assembled like building blocks, resulting in high construction efficiency; they have strong integrity and good seismic resistance. A single 30㎡ module of a cement house can be prefabricated in the factory in just 7 days. After being transported to the site, it can be installed by 3 workers with a crane in just 4 hours, and a 100㎡ house can be fully erected in just 2 days.