Prefabrication of Framework Structure Houses
The prefabrication of framework structure houses mainly involves two construction methods: prefabricated framework and assembled monolithic framework.
Prefabricated Framework
In the prefabricated framework construction method, beams, columns, and floor slabs are all prefabricated components. These prefabricated components are produced in a factory according to design requirements in a standardized manner, ensuring high precision and quality stability. At the construction site, these prefabricated beams, columns, and floor slabs are assembled and connected through welding to ultimately form an integrated framework structure. The advantages of this construction method lie in the fact that since most components are prefabricated in the factory, the amount of wet work on-site is reduced, significantly shortening the construction period. Meanwhile, factory production facilitates quality control of components and minimizes quality fluctuations caused by on-site construction condition limitations. Moreover, on-site welding and assembly are relatively simple, imposing relatively low technical requirements on workers and facilitating construction organization. However, the quality of welding connections has a significant impact on the overall structural stability. If the welding process is subpar, there may be weld quality defects, affecting structural safety. Additionally, the overall integrity and seismic performance of the prefabricated framework are relatively weak. Under the action of natural disasters such as earthquakes, structural deformation and damage may be more pronounced.
Assembled Monolithic Framework
The assembled monolithic framework involves first installing the prefabricated beams, columns, and slabs in place on-site. During the installation process, it is necessary to ensure accurate positioning and firm connections of the components. After installation, concrete is poured later at the upper part of the beams and at the beam-column joints. The role of the later-poured concrete is to integrate the various prefabricated components into a whole, enhancing the overall integrity and seismic performance of the structure. This construction method combines the advantages of prefabricated components and the overall integrity of cast-in-place concrete. On one hand, the use of prefabricated components can shorten part of the construction period and reduce on-site pollution. On the other hand, the later-poured concrete ensures the overall integrity of the structure, enabling it to perform better under load-bearing and earthquake-resistant conditions. However, the construction process of the assembled monolithic framework is relatively complex, imposing high requirements on on-site construction management and technology. Quality control of the later-poured concrete is also crucial, as it is necessary to ensure that indicators such as concrete strength and compactness meet design requirements; otherwise, the overall performance of the structure will be affected.
