Prefabricated reinforced concrete structural column for prefabricated buildings

Abstract

The invention aims at improving a prefabricated reinforced concrete column for prefabricated buildings and discloses a prefabricated reinforced concrete structural column for prefabricated buildings. The prefabricated reinforced concrete structural column is characterized in that a longitudinal part which belongs to a joint of a column body and a beam, is located in a reinforced concrete and is subjected to a force is still a reinforced concrete column body; the longitudinal part of the joint of the column body is not provided with a reinforce concrete later casting section and is a whole prefabricated column; outer thread is arranged on at least one part which belongs to an extended connection rebar and stretches out from a side surface of the column body; and at least one end of the longitudinal part of the column body is provided with a section steel joint and a connection rebar, wherein the section steel joint and the connection rebar stretch out from a end surface. Therefore, the prefabricated reinforced concrete column has the advantages that the prefabricated reinforced concrete column can utilize the existing reinforced concrete column design software to carry out graphing; through the connection of a column body and a beam rebar and the fast connection based on sleeve screw thread and chemical bonding, the vertical connection between column bodies is realized; through sleeve chemical slip-casting connection, fast connection between prefabricated building rebars is realized so that a prefabricated building assembling speed is greatly improved and a large amount of labor is saved; a joint of a column body and a beam is not provided with a reinforce concrete later casting section so that joint reinforce concrete strength can reach or exceed strength of a cast-in-situ reinforced concrete column structure; and through sleeve connection, the joint is reinforced thereby becoming a strong joint having seismic resistance.

Description

technical field [0001] The present invention is a further improvement and perfection of the prefabricated reinforced concrete column for buildings in the applicant's prior patent application 201010120198.9, especially relates to a prefabricated reinforced concrete structural column for prefabricated buildings that can realize rapid installation and construction without changing the original building design . Background technique [0002] The applicant first applied for the patent 201010120198.9 "Connection joints between prefabricated reinforced concrete columns and beams", and proposed a prefabricated reinforced concrete column with joints connected to beams. Axial steel pipes (stiff steel columns) are arranged inside, steel pipes and beams have steel joints radially protruding from the side of the column, the core and the connecting steel bars connecting the structural steel bars of the beams, and uncast concrete sections are left at the joints of the beams , after on-sit...

AI Technical Summary

Problems solved by technology

However, there are still three deficiencies in practical application: first, there is post-cast concrete at the joints of the columns and beams. The column calculation software cannot be used, and this part needs to be calculated separately, which increases the difficulty of column design and brings certain restrictions to the promotion of prefabricated buildings; and due to the existence of post-casting sections of concrete (prefabricated incomplete pouring), due to shrinkage differences, there may be The compressive strength of the concrete at the upper and lower points of the column is not the same; the second is that the connecting steel bars connecting the connecting nodes and the upper and lower structural steel bars of the beam need to be welded one by one when connecting with the beam, and according to the architectural design code, the single-sided welding length needs to reach 10D , the double-sided welding needs to reach 5D, and there are many connecting steel bars, which makes the welding workload of steel bar connection huge, and with the continuous increase of labor costs, the contradiction of welding labor costs is more prominent, and the assembly construction is not fast, plus Welding is an aerial operation, which is affected by operating conditions and human factors. If the welding quality is guaranteed to be consistent, there will be hidden dangers in the quality; third, there is a post-casting section at the connection node, and the strength of the prefabricated reinforced concrete column cannot be fully exerted before the pouring. It makes the assembly can not be carried out continuously, and also causes the construction to slow down, and loses the fast function of the prefabricated building part

The disadvantages of this node system are: there is still a post-cast belt at the node of the prefabricated column, and it needs to be assembled with the beam on site and poured concrete, which also has the disadvantage of post-cast; Insufficient performance; the general bending anchor connection adopted between the three beams and the column reinforcement lacks additional connections, and the connection nodes are weak links with poor vibration resistance; the four structures cannot be connected quickly, so the defects in the prior art have not been effectively solved overcome, there is still room for improvement

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