Connecting node of assembled whole thick prefabricated slab unit and slab unit thereof

Abstract

The invention discloses a connecting node of an assembled whole thick prefabricated slab. Connecting steel bars are reserved on the connecting surface of a prefabricated slab unit in the mode, the exposed parts of the connecting steel bars are ' '-shaped, and the exposed parts and the connecting surface form a closed polygon. In the connecting mode for the prefabricated slab unit and a beam or a wall, the connecting steel bars of the prefabricated slab unit are inserted with steel bars configured for the beam or the wall together at the connecting positions in a penetrating mode. Viewing from the cross section of the whole connecting node, the connecting steel bars and the steel bars configured for the beam or the wall form a single closed stirrup or a composite stirrup, and longitudinal bolt steel bars penetrate into the inner corner position of the single closed stirrup or the composite stirrup. The connecting node of the whole thick prefabricated slab unit can achieve the equivalent performance as a prefabricated slab connecting nodes and a cast-in-place concrete structure while achieving higher prefabrication rate and assembly rate. The invention further provides the whole thick prefabricated slab unit for achieving the connecting mode.

Description

technical field [0001] The invention relates to a prefabricated assembled concrete structure, in particular to a connection node of an assembled prefabricated floor slab and a floor slab unit thereof. Background technique [0002] Since prefabricated buildings conform to the production mode of environmental protection and energy saving, the country has proposed the development goal of making prefabricated buildings account for 30% of new buildings in about 10 years. The specific notice of the special 2016 annual project declaration guide mentioned the research content of the project (excerpted relevant content): research on the new connection nodes of prefabricated concrete structures and their basic structural performance, research on the industrialization adaptability of concrete prefabricated structural systems in the 8-degree area, and put forward The new series of connection node forms meet the same performance requirements as cast-in-place structures. [0003] Assembl...

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Problems solved by technology

In this form, the compressive stress of the friction force comes from the post-tensioned prestressed steel strands on site. Because of the special requirements of the connection, the construction process of the prestressed steel strands is cumbersome and difficult. The technical requirements are very high; in addition, the prestressing purpose of the joint tension is for the connection, and additional stress is generated on the original assembled components, which not only increases the design difficulty but also affects the project cost; and when using the "IMS" system , prestressed friction joints not only need to meet the relevant regulations of reinforced concrete structures, but also meet the requirements of "Technical Regulations for Integral Prestressed Prefabricated Slab-Column Structures CECS52: 2010", which is only an association standard regulation, not a national standard. From On the other hand, it indirectly shows that there are some problems in the connection method of the "IMS" system, or at least it shows that it is not a perfect structural form, and it is an implementation technology that has not passed national approval; in application, it is difficult to construct on site—that is, it is not suitable for industrial construction and the cost is high. , The implementation of standards was hindered, resulting in not many applications in the past 20 or 30 years

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