The prefabricated prestressed concrete assembled integral frame structure system, hereafter referred to as the “SCOPE system,” represents an innovative frame structure technology. It utilizes either cast-in-place or prefabricated reinforced concrete columns, combined with prefabricated prestressed concrete beams and slabs. These elements—beams, slabs, columns, and nodes—are integrated through reinforced concrete post-pouring, creating a unified whole. This system aligns with the trend toward construction industrialization and supports the principles of a conservation-oriented society. Notably, it was recognized as one of the “10 new technologies” promoted by the Ministry of Housing and Urban-Rural Development during China’s 12th Five-Year Plan.
In practical engineering applications, the SCOPE system manifests in three primary structural forms:
- A fully assembled frame structure using prefabricated columns, prestressed concrete composite beams, and slabs.
- A semi-assembled frame structure, featuring cast-in-place columns combined with precast prestressed concrete composite beams and slabs.
- A system employing only precast prestressed concrete composite panels, adaptable for various building types.
This system offers significant advantages over conventional frame structures, summarized as follows:
1. By employing prestressed high-strength steel bars and high-strength concrete, the cross-sections of beams and slabs can be significantly reduced. Beam heights can be as low as 1/15 of the span, and slab thicknesses down to 1/40 of the span. This reduces the building’s self-weight and lowers the steel content in beams and slabs by 20–30%. Compared to cast-in-place structures, costs can be reduced by over 10%.
2. The use of prestressing technology in prefabricated slabs greatly enhances crack resistance, effectively addressing the common issue of cracking in cast-in-place floor slabs. Additionally, beams and slabs manufactured mechanically in factories benefit from better quality control, resulting in superior appearance and durability.
3. On-site construction of beams and slabs eliminates the need for formwork (industrialized construction), and the spacing between support poles under the slabs can be extended to 2.0–2.5 meters. This reduces the use of turnover materials by more than 80% compared to cast-in-place methods.
4. Beam and slab components are prefabricated off-site and installed directly, streamlining construction and reducing the main structure’s construction period by over 30%.
5. Neither beams nor slabs require painting, minimizing wet work on site. This not only supports environmental protection but also reduces noise pollution and promotes a cleaner, more civilized construction environment.
Unlike typical prefabricated components, the size of the prefabricated panels in this system is not constrained by modular dimensions, allowing flexible division according to design requirements and offering strong adaptability.
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