JPS61200231A - Skeletal construction of rc structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to an RC system whose framework is a reinforcing bar assembly consisting of column assembly reinforcing bars and beam assembly reinforcing bars using large-diameter threaded reinforcing bars as column main reinforcements. Concerning methods of constructing frameworks for structures.

A method for constructing SRC structures using large-diameter threaded reinforcing bars as beam main reinforcements was previously proposed in Japanese Patent Application No. 57-96777 and Japanese Patent Application No. 57-213190. In addition, main bars made of large-diameter threaded reinforcing bars and shear reinforcing bars wrapped and fixed around them (when assembling the star body, the main bars to be connected can be assembled in such a way that the thread phases of the main bars match in advance. A method for assembling a reinforcing bar end assembly is proposed in Tokucho No. 60-2541.The present invention
By applying this reinforcing bar assembly method, we have devised a new and useful method for constructing frames for RC structures.

[Conventional technology]

A method of constructing a frame for an RC structure using vertical beam reinforcing bars using large-diameter threaded reinforcing bars as the main reinforcing bars and assembled reinforcing bars for company use is already known.

However, in this construction method, the column main reinforcement and beam main reinforcement are assembled in a non-rotatable state, and their screw thread phases do not match, so lock nuts, the most common means of connecting large diameter threaded reinforcement, are used. A major drawback is that joints cannot be used to connect column reinforcements or beam reinforcements. In addition, the short threaded reinforcing bars for connecting beam main bars are held in a rotatable state in the rectangular steel plate frame welded to the column and beam joints of the company-use assembly reinforcing bars, and the company-use assembly reinforcing bars are erected in a predetermined position. After installation, the beam-side assembled reinforcing bars can be lifted between these company-use assembled reinforcing bars using a crane, etc., and both ends of the beam-side assembled reinforcing bars can be connected to the threaded reinforcing bars for connecting the beam main bars using lock nut joints, etc. Because of this, there are a large number of connections between the beam main reinforcements, and the beam main reinforcements have to be connected while the vertical reinforcement bars are suspended and supported, leaving room for improvement in construction efficiency. be.

In addition, as seen in the architectural magazine "Architectural Technology July 1979 issue," the reinforcing bar assembly, which is made by holding the beam-side assembled reinforcing bars on company-use assembled reinforcing bars, is assembled into the ground, and the column main bars are connected with lock nut joints. However, a construction method is also known in which the main beam reinforcements are connected at the center of the span. However, with this construction method, when joining the next reinforcing bar assembly above the previously erected reinforcing bar assembly, it is necessary to rotate the column main reinforcement to match the thread phase of the upper and lower column main reinforcement. Because of this, the rebar assembly for the company is not a complete rebar assembly, and is in a semi-pre-assembled state in which the main rebar and the rectangular steel plate frame of the column and beam joint can freely rotate. Therefore, during construction, it is necessary to secure each column main reinforcement and the steel plate frame at the column and beam joints, which poses a problem in work efficiency on site.

Moreover, since the main reinforcement and the steel plate frame can rotate freely relative to each other, so to speak, they are in a semi-assembled state, so the rigidity of the assembled reinforcing bars for the company is poor, and therefore it is difficult to fabricate a reinforcing bar assembly with the vertical length of a multi-story frame. However, the disadvantage is that erection cannot be carried out efficiently.

[Problem that the invention seeks to solve]

In view of the above-mentioned conventional drawbacks, the present invention improves the rigidity of the assembled reinforcing bars by fixing the main column reinforcement and the steel plate frame of the column-beam joint in advance, thereby assembling the reinforcing bars of vertical length over multiple levels. At the same time, it is possible to connect the upper and lower column main reinforcements using a lock nut joint, and there is no need to fix the column main reinforcements and the steel plate frame at the column and beam joints. The number of connections between the beam main reinforcements is small, and the unstable work of connecting the beam main reinforcements while the beam side assembled reinforcing bars are suspended and supported by a crane, etc. can be eliminated, thereby significantly improving work efficiency. [Another means to solve the problem] In order to solve the above problem, the method for constructing a frame for an RC structure according to the present invention is to install large-diameter screw joints in a steel plate frame in which notches for inserting beam main reinforcements are formed. A main reinforcing bar made of reinforcing bars is fixed, and a hoop reinforcing bar is wound and fixed around the column main reinforcing steel plate frame, and the beam side assembly reinforcing bars are held in a state where the beam main reinforcing bars fit into the notches. A plurality of reinforcing bar front assemblies are prepared in such a manner that the threads of the column main reinforcements of the reinforcing bar front assemblies to be vertically connected are completely screwed in advance, and the column main reinforcements of the vertically adjacent reinforcing bar front assemblies are The structure is characterized in that they are connected to each other by lock nut joints, and the beam main reinforcements of horizontally adjacent reinforcing bar end assemblies are connected to each other at the center of the span by appropriate means.

〔Example〕 Embodiments of the present invention will be described below based on the drawings.

Fig. 1 shows the entire reinforcing bar end assembly composed of a company-use assembly reinforcing bar A1 and a passenger-use assembly reinforcing bar A2. Column main reinforcements 3 made of large-diameter threaded reinforcing bars are fixed to the four corners of the rectangular steel plate frame 2 by welding, and hoop reinforcements 4 such as spiral reinforcements are wound around the main reinforcements 3 by means such as welding and bundling. The above-mentioned riding assembly reinforcing bars A2 are
A stirrup 6 such as a spiral reinforcement is wound around a beam main reinforcement 5 made of a large-diameter threaded reinforcing bar, and fixed by means such as welding or bundling. And beam side assembly reinforcement A
2 is two pairs of fixing nuts 7 that fit each beam main reinforcement 5 into the notch 1 and screw into the threaded joint of each beam main reinforcement 5 on the steel plate frame 2 of the company-use assembly reinforcing bar A. Both the front and back sides of the steel plate frame 2 are held in a sandwiched state.

The screw thread phases of the column main reinforcements 3 of the reinforcing bar front assemblies A to be vertically connected are matched in advance.

Company-use assembly reinforcing bar A1 where the screw thread phase between column main bars 3 has failed.
An example of the assembly method is as follows.

That is, as shown in FIG. 3(a), hoop reinforcements 4 are wound and fixed around the main column reinforcements 3, and the steel plate material of the steel plate frame 2 is welded and fixed to the predetermined position of the column main reinforcements 3. Company-use assembly reinforcing bar A
1, as well as the column main reinforcement 3 of the company assembly reinforcing bar A.
Next, the column main reinforcement 3 of the reinforcing bar tip assembly A to be connected upward is connected by a lock nut joint 8 consisting of a sleeve with a threaded hole and a pair of lock nuts that can come into contact with both end surfaces of the sleeve.

After that, as shown in FIG. 3(B), while maintaining the above-mentioned connected state, the hoop reinforcement 4 is wound and fixed, and the material steel plate of the steel plate frame 2 is welded and fixed, and the second company-use assembled reinforcing bar is assembled. A3, that is, the company-use assembly reinforcing bar A for the reinforcing bar tip assembly to be connected upward is produced.

Next, the connection by the lock nut joint 8 is released, and the first assembled reinforcing bar A is moved to another position, and as shown in FIG. 3(c), the second reinforcing bar A, Move the reinforcing bar AI to the position where the first assembly reinforcing bar AI was, connect the column main bar 3 of the reinforcing bar assembly A that should be connected above to the main bar 3 with a lodge nut joint 8, and then wrap the hoop bar 4. Fixation,
The material steel plate of the m-plate frame 2 is welded and fixed, and the third company-use assembly reinforcing bar A is produced.

Thereafter, similar steps are repeated to produce company-use assembly reinforcing bars A up to a desired floor.

After producing a desired number of reinforcing bar end assemblies A consisting of the company-use assembly reinforcing bars A1 and the passenger assembly reinforcing bars A2 produced by the method described above, these reinforcing bar end assemblies A are used to form the reinforcing bar assemblies A shown in FIG. 4(A). Construct the section as shown in . Fixing the column base is
For example, this is done by raising a column reinforcement 3a from an underground beam (not shown) and connecting the lower end of the column main reinforcement 3 to this using a lock nut or the like. The beam main reinforcements 5 of the horizontally adjacent reinforcing bar tip assemblies A are connected to each other at the center of the span.
This is done by an appropriate means such as a locknaft joint or a crimp joint.

After that, the second section is erected as shown in Figure 4 (b). Since the screw thread phases of the column main reinforcements 3 of the vertically adjacent reinforcing bar pre-assembled bodies A are matched in advance at the time of manufacturing the company-use assembled reinforcing bars A1, the upper and lower column main reinforcements 3 are connected to each other by the lock nut joint 8. It is desirable that the connection between the main reinforcement 3 and the columnar reinforcement 3a and the connection between the main reinforcements 3 be performed at a recursion point or a position near it. ) and column main reinforcement 3
After the beam main reinforcements 5 are connected to each other, the main beam reinforcements 5 are connected to each other at the center of the span by appropriate means such as a lock nut joint or a crimp joint.

Thereafter, similar steps are repeated to construct the framework of the RC structure.

In addition, the production of company-use assembly reinforcing bars AI, beam assembly reinforcing bars A2, and reinforcing bar tip assemblies is performed at the construction site, but company-use assembly reinforcing bars A
1 and the passenger assembly reinforcing bar A2 may be produced in a factory, and the two may be combined at the construction site. The rectangular steel plate frame 2 can be formed by forming four steel plates 2a into a rectangular shape via main column reinforcements 3, as shown in the figure, or by cutting a rectangular cylinder into rings, for example.
In some cases, the steel plates on the four sides are directly connected to form a rectangular shape, such as in the case of forming a rectangular shape. Furthermore, in the above embodiment, the column main reinforcement 3 was fixed to the steel plate frame 2 by welding, but as shown in FIG. Suy t・ which screws into the contradiction clause of
] The main column reinforcement 3 may be fixed to the steel plate frame 2 by tightening the steel plate frame 2, or by crimping the sleeve 9 welded to the four corners Q of the steel plate frame 2, as shown in FIG. The main reinforcing bars 3 may be constructed without being fixed to the steel plate frame 2.

The shape of the reinforcing bar end assembly is not limited, and it is also possible to implement it as shown in FIGS. 7(B) and (C), for example.

Using large-diameter threaded reinforcing bars as the beam main reinforcements 5 and holding the steel plate 2a of the steel plate frame 2 from both the front and back sides with two pairs of fixing nuts 7 for each beam main reinforcement 5 as shown in FIG. Although this invention is very effective in preventing slippage with concrete, when applying the present invention to the upper part of a low-rise building or a high-rise building, it is difficult to use ordinary beam main reinforcements 5 because no large force is applied. Deformed reinforcing bars may also be used. In this case, it is sufficient to hold the main beam reinforcing bars 5 in the steel plate frame 2 to the extent that they can be prevented from falling off, and the beam main reinforcements 5 are fixed to the steel plate frame 2 by means such as binding. Although not shown, the present invention can also be applied to an RC structure with circular pillars. In this case, the steel plate frame 2 is made circular, and main lines 3 are placed at key points on its inner surface.
are fixed by the same means as described above. The means for fixing the main beam reinforcement 5 to the circular steel plate frame 2 is the same as when the steel plate frame 2 is square.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it has the following effects.

Since the main column reinforcement made of large-diameter threaded reinforcing bars and the steel plate frame of the column and beam joints are fixed, the rigidity of the assembled reinforcing bars for company use is high, and it is possible to assemble the reinforcing bars in length over multiple levels. The number of connecting parts is reduced by the fact that the passenger assembly reinforcing bars are held in the above-mentioned control board frame of the company assembly reinforcing bars, and the beam main reinforcements are connected at the center of the span. However, since the thread phases of the column main reinforcements of vertically adjacent reinforcing bar assemblies match, LockNand joints are the simplest and cheapest way to connect threaded reinforcing bars. It is possible to connect the upper and lower column main reinforcements, and it is also possible to perform on-site work at the column and beam joint to secure the column main reinforcements and the steel plate frame, and to connect the beam main reinforcements while suspending and supporting the passenger 5 assembly reinforcing bars with a crane, etc. There is no unstable work, and as a result, work efficiency can be improved.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the method for constructing a frame for an RC structure according to the present invention, and FIG. 1 is a perspective view of a reinforcing bar assembly, FIG. 2 is a plan view of the main part, and FIG. )(c) is an explanatory diagram of the procedure for manufacturing the assembly reinforcing bars for use in the company, and FIGS. 4(a) and 4(b) are explanatory diagrams of the procedure for constructing the frame. FIGS. 5 and 6 are sectional views of essential parts showing other embodiments of the present invention. FIGS. 7(a), 7(b), and 7(c) are schematic front views illustrating a reinforcing bar end assembly used in the present invention. A... Reinforcing bar tip assembly, A,... company-use assembled reinforcing bar, A2.
... Passenger assembly reinforcing bars 1, 1... Notch, 2... Steel plate frame, 3... Column main reinforcement, 4... Hoop reinforcement, 5... Beam main reinforcement, 7... Anchoring naso [8 ...Lock nut joint. Figure 4 (a) Figure 5 Figure 6

Claims (4)

[Claims] (1) Column main reinforcement made of large-diameter threaded reinforcing bars is fixed to a steel plate frame with a notch for inserting the beam main reinforcement, and hoop reinforcement is wound and fixed around the column main reinforcement. A plurality of reinforcing bar end assemblies in which assembled reinforcing bars for beams are held in a state where the beam main reinforcing bars are fitted into the notches are held in the above-mentioned rope plate frame, and the thread phase of the column main reinforcement of the reinforcing bar end assemblies to be vertically connected is determined. Column main bars in vertically adjacent reinforcing bar assemblies are connected to each other using lock nut joints, and beam main bars in horizontally adjacent reinforcing bar assemblies are connected to each other at the center of the span by appropriate means. A method for constructing a frame for an RC structure, which is characterized by connecting parts. (2) Large-diameter threaded reinforcing bars were used as the beam main reinforcements, and each beam main reinforcement was held in the steel plate frame on both sides of the steel plate frame by two pairs of fixing nuts screwed into the threaded joints of the beam main reinforcements. Claim No. (1) characterized in that the state is maintained.
A method for constructing a frame for an RC structure as described in section. (3) The method for constructing a frame for an RC structure according to claim (1) or (2), wherein the steel plate frame is rectangular. (4) The method for constructing a frame for an RC structure according to claim (1) or (2), wherein the steel plate frame is circular.