Cavity floor assembled by adopting haunched beam

Abstract

The invention provides a cavity floor assembled by adopting a haunched beam. The floor comprises a prefabricated column, a prefabricated convex beam, the haunched beam, cavity plate components, a vertical combination ribbed beam, regeneration transverse rib rebars and joining seams; the floor is characterized in that rebars are reserved at the two ends of the prefabricated column; reserved threaded rebars or prestress rebars are reserved at the two ends of the prefabricated convex beam; the prefabricated convex beam is a hollow beam; two or more holes for vertical combination ribbed beam rebars penetrate through are reserved in the prefabricated convex beam, so that the vertical combination ribbed beam of a continuous plate strip is formed; the haunched beam is arranged on the combinationportion of the prefabricated column and the prefabricated convex beam; each cavity plate component is composed of a vertical reinforced concrete ribbed beam, a horizontal reinforced concrete ribbed beam, a cavity body and a lower flange slab; the cavity plate components are arranged on the edges of the prefabricated convex beam; the depths of the joining seams of the cavity plate components are smaller than or equal to 50 mm.

Description

[0001] The invention relates to a prefabricated building system technology, in particular to a cavity floor slab technology assembled by adding haunch beams. Background technique [0002] In order to adjust the structure of the construction industry, improve the quality of construction, speed up construction, achieve energy conservation and environmental protection, and reduce project costs, the state has proposed to vigorously promote prefabricated buildings and specified specific implementation plans; It is widely used in wall structure, steel structure and steel-concrete composite structure system, which clarifies the structural system and application field of my country's prefabricated building; however, the prefabricated building floor with long-span horizontal structure has just started, and the common laminated floor is used , The lack of establishment of the technical system leads to high cost and ungroundedness, which restricts the development of the prefabricated constr...

AI Technical Summary

Problems solved by technology

In order to promote the healthy development of housing industrialization in our country, recently, the inventor participated in the largest-scale "fabricated large-span steel structure space without secondary beam" chaired by Tongji University, the School of Civil Engineering and Architecture of Central South University, and the National Tianjin Fire Research Institute in his own production base. cavity floor slab full-scale test", "fabricated large-span non-exposed beam reinforced concrete structure full-scale test", "fire-fighting and smoke exhaust test using prefabricated cavity floor slab" to test the innovativeness, advancement and rationality of the inventor's existing technology performance and safety; the test adopts the multi-span load compression full-scale test of the continuous strip and the full-scale test of the ultimate load loading of the prefabricated floor slab. Surrounding cantilever 1.6m, side length 11.6m, compression area 134.56m 2 , The dynamic load is 2KN, and the actual load is 22KN; the limit crack national standard is 1.5mm, and the actual crack is only 0.5mm; the limit deflection calculated according to the national standard is 168mm, and the actual deflection is 39mm; the prefabricated building has no exposed beam in the reinforced concrete structure through the test Or the safety of steel structures without secondary beams; the test verified that the one-way stressed floor components are changed into two-way stressed floors, and the single simply supported floor components are changed into continuous slab structures; the large-span Floor components combined with joint cracking, fire protection, sound insulation, perennial maintenance, assembly technology and other issues, especially the cost of prefabricated buildings has been reduced by 20%; the full-scale test of the structure has laid a solid foundation for further innovation of prefabricated buildings; however, the test Reveal the law of the internal force distribution of the prefabricated building structure, and under the premise of ensuring the safety requirements of the prefabricated building structure, there is still a lot of room for optimization in the prefabricated building technology

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