Empty cavity board member used for assembled steel structure

Abstract

The invention provides an empty cavity board member used for an assembled steel structure. The empty cavity board member comprises a reinforced concrete longitudinal rib beam, a reinforced concrete transverse rib beam, a ribbed steel network, a surface exposed steel bar, a hanging ring, a lower flange plate and a two-end-head concrete downward concave part. The lower bottom surface of at least oneedge of longitudinal rib beam concrete in the reinforced concrete longitudinal rib beam concrete is provided with an L-shaped concrete bulge. A lower steel bar of the reinforced concrete transverse rib beam steel bar is exposed. The ribbed steel network is an expansive ribbed steel network or a scale ribbed steel network. A network body of the ribbed steel network is a ribbed metal net. The ribbed steel network is internally provided with a cold-dial net supporting body or a foamed cement block supporting body. The lower flange plate is composed of a metal net and concrete mortar. The two-end-head concrete downward concave part makes the height of a transverse reinforced concrete rib beam be lower than the heights of other transverse reinforced concrete rib beams.

Description

technical field [0001] The invention relates to a prefabricated building system technology, in particular to a cavity plate member technology for a prefabricated steel structure. Background technique [0002] The country vigorously promotes prefabricated buildings and clarifies the specific implementation plan; and requires them to be widely used in reinforced concrete frame structures, reinforced concrete frame shear wall structures, steel structures, and steel-concrete composite structural systems. System and application field; however, the prefabricated building floor with horizontal structure has just started, and the ordinary laminated floor is used, the technology has defects, the cost of prefabricated building is too high, and it is not grounded, which hinders the speed of national promotion of prefabricated building. [0003] Such as the inventor's ZL200410082381.9 "an empty stomach small ribbed floor" and ZL200820126232.1 "a cast-in-place steel concrete cavity floor...

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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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