JPH08246552A - Structure of fastener and joint in x-type arrangement of reinforcements - Google Patents

Abstract

PURPOSE: To facilitate the accuracy management and work execution. CONSTITUTION: This is the structure of a fastener in X-type arrangement of reinforcements, where at least a part of the main rods 3 and 4 arranged in longitudinal direction of a beam 2 put up between the poles 1 of a building crosses each other in X shape along the vertical plane at the center in longitudinal direction of the beam 2, and both ends of each X-type reinforcing rod 4 arranged in parallel in the longitudinal direction of a beam are compressed and bonded by bolts and nuts through specified plates 7 for junction in the position of the connection 5 between a pole 1 and a beam 2. A fastening plate may be used in place of the plate 7 for junction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a fixing portion and a joint portion of so-called X-shaped bar arrangement arranged on a beam of a building.

[0002]

2. Description of the Related Art As a reinforcing bar structure of a main bar arranged in the longitudinal direction of a beam spanning between columns of a building, conventionally,
It was common for the mutual main bars to be arranged parallel to the longitudinal direction of the beam. On the other hand, in recent years, a so-called chiup frame has been widely adopted as a frame structure of high-rise buildings.

This frame structure is composed of an X-direction frame and a Y-direction frame which are respectively composed of columns and beams.
A tube-shaped (cylindrical) outer wall structure that constitutes an outer wall frame of a building is constructed, and only the outer wall structure bears a design load, seismic force, or the like. In such a frame type, the inside of the outer wall structure can be made pillarless and beamless, so that it is possible to obtain an interior space having a high degree of freedom in plan planning and excellent habitability.

In such a tube frame, in order to resist the seismic force, for example, in the entire outer wall structure, the seismic force is applied not only to the frames parallel to the force application direction but also to the frames orthogonal thereto. I am trying.
That is, when an X-direction seismic force is applied to a building, a part of the axial force generated in the X-direction frame parallel to it is transmitted to the orthogonal Y-direction frame so that both sides bear the axial force during the earthquake. It has become. In this way, in order to bear the seismic force in the entire outer wall structure and effectively transmit the stress from the parallel frame to the orthogonal frame, the column interval (span) of each frame is made smaller than the conventional general structure, Beam stiffness,
It is necessary to increase the strength to some extent.

Therefore, a so-called X-shaped bar arrangement as disclosed in JP-B-5-65662, JP-A-64-29558, JP-A-64-43636 or JP-B-6-6824 is used. Being developed. This X-shaped bar is, for example, as shown in FIG. 9 and FIG. 10, a main bar 5 arranged in the longitudinal direction of a beam spanned between columns of a building.
Of 0 and 51, the main bars 50 are ordinary reinforcing bars arranged in parallel, but the main bars 51 inside the beam intersect each other in the X shape along the vertical plane at the longitudinal center of the beam, and The end portion of the beam and the beam embedded in the joint portion has a bent portion 52 formed at the edge of the joint portion, and is arranged in parallel with the main bar 50 in the joint portion, and further, the other end edge in the joint portion. The main bar 51 is curved and arranged in a direction facing up and down by approximately 90 degrees with respect to the extending direction of the main bar 51.

As described above, by constructing a structure in which a part of the main reinforcements are crossed in an X shape at the central portion in the longitudinal direction of the beam, the toughness and strength of the beam are increased as compared with the reinforced concrete beam of the normal reinforcement. However, the reinforced concrete beam can have toughness and strength enough to be used as a short span beam.

[0007]

However, the above-mentioned conventional X-shaped bar arrangement joint is mainly connected by pressure welding at the intermediate portion of the member. However, the conventional X-shaped rebar has a drawback in that it has many bent portions and the arrangement is complicated as described above, and the workability at the site is not very good. Further, as shown in FIG. 10, the bent portion 52 of the X-shaped reinforcing bar must be arranged so as to be located at the end edge of the joint between the column and the beam, but the reinforcing bar contracts at the pressure contact position due to pressure contact. Therefore, the bent portion 5
It is difficult to adjust the position of 2. Further, in the X-shaped bar arrangement, since the left end and right end rebars intersect at the central part of the member, it is necessary to secure the position in the member, which causes a problem that the member width becomes large. SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the related art and to provide a structure of a fixing portion and a joint portion of an X-shaped bar arrangement that is easy to perform quality control and construction.

[0008]

In order to achieve the above-mentioned object, in the invention according to claim 1 of the present application, at least one of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building. A structure of an anchor portion of an X-shaped bar arrangement in which the portions intersect each other in the X-shape along the vertical plane at the central portion in the longitudinal direction of the beam, and the X-shaped reinforcing bars arranged in parallel in the longitudinal direction of the beam. Both end portions of the column are crimped and joined by bolts and nuts through a predetermined joining plate at the positions of the joints of the pillar and the beam.

Further, in order to achieve the above object, in the invention according to claim 2 of the present application, at least a part of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building are mutually beamed. The structure of the fixing part of the X-shaped bar arrangement that intersects in the X shape along the vertical plane at the central part of the longitudinal direction of each of the X-shaped rebars arranged in parallel in the longitudinal direction of the beam. It is characterized in that the fixing is performed by attaching a predetermined fixing plate at the position of the connecting portion of the pillar and the beam.

Further, in order to achieve the above object, in the invention according to claim 3 of the present application, at least a part of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building are mutually connected. A structure of a joint portion of an X-shaped bar arranged in a central portion in the longitudinal direction along a vertical plane in an X-shape, wherein each of the reinforcing bars constituting the X-shaped reinforcing bar is approximately in the central portion in the longitudinal direction of the beam. The end portions are overlapped with each other, and spiral reinforcing bars are wound around the outer periphery of the lap joint portion for reinforcement.

In order to achieve the above object, in the invention according to claim 4 of the present application, at least some of the main bars arranged in the longitudinal direction of the beams bridged between the columns of the building are mutually beamed. Is a structure of a joint portion of an X-shaped bar arranged in a central portion in the longitudinal direction of the beam along a vertical plane in an X-shape, and each reinforcing bar constitutes an X-shaped reinforcing bar at a substantially central portion in the longitudinal direction of the beam. It is characterized in that the end portions of are overlapped with each other and the lap joint portion is fixed with a predetermined clip. In addition, in the pair of the lap joints of the X-shaped reinforcing bars in the upper and lower two stages, X
It is desirable that the stacking positions of the reinforcing bars be vertically symmetrical.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention, in which 1 is a pillar of a building and 2 is a beam.

A predetermined number of main reinforcements are vertically arranged on the beam 2 spanning between the columns 1, and the main reinforcements 3 and 3 arranged at both ends in the beam width direction are parallel to the longitudinal direction of the beam. It is arranged. On the other hand, the main bars 4, 4 arranged at the center of the beam width direction
Is formed as an X-shaped rebar.

That is, in this embodiment, as shown in FIG.
The pair of beam main bars 4 constituting the type reinforcing bar are extended to intersect each other in the X-shape along the vertical plane at the longitudinal center of the beam 2, and at both ends of the beam main bar 4, the column 1 and the beam 2 are provided. Bent portions 6 are formed at the end edges of the joint portion 5, are bent so as to be parallel to the longitudinal direction of the beam 2, and are further extended in the joint portion 5 in parallel with each other. X type rebar is constructed.

In the joint portion 5, however, as shown in FIG. 3, the end of the beam main bar 4 extending from the beam 2 on the left side of the column 1 and the beam 2 on the right side of the column are extended. The end portions of the main beam reinforcement 4 thus formed are arranged so as to overlap each other in a horizontal plane. In the present embodiment, the end portions of each of these four beam main bars 4 are connected to the left and right 2 in FIG.
It is sandwiched by the joining plates 7 arranged above and below in some places, and at the positions of the mounting holes formed in the joining plates 7 above and below the bolts 8 and the nuts 9, each of the four beam main bars 4
The end portions of are joined by crimping.

In the present embodiment having such a structure,
When crimping and joining the ends of each of the four beam main bars 4 with the upper and lower joining plates 7 with the bolts 8 and the nuts 9, the end positions of the beam main bars 4 are set in the longitudinal direction of the beam 2 (left and right in FIG. 3). Since it is possible to adjust the movement along the direction), it is possible to absorb the construction error in advance and accurately arrange the bent portion 6 at the end edge position of the joint portion 5 of the column 1 and the beam 2, thus facilitating accuracy control. Becomes Further, since it is a mechanical joint, construction accuracy is improved.

Next, FIGS. 4 to 6 show a second embodiment of the present invention, in which the same components as those of the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted. Also in this embodiment, as in the first embodiment, each beam main bar 4 has a pair of bent portions 6 formed at the end edges of the joint portion 5, and the beam 2 is cut along the vertical plane at the center in the longitudinal direction of the beam 2. The beam main bars 4 are arranged so as to intersect each other in a letter shape, and the end portions of the beam main bars 4 are overlapped with each other in the horizontal plane in the joint portion 5.

In this embodiment, however, the fixing plates 10 are fixed to the ends of the four main beam bars 4 of each of the beams,
In FIG. 6, fixing is performed at two positions on the left and right. The fixing plate 10 may be a known off-the-shelf product. Also in this embodiment, the same operational effects as those of the first embodiment can be obtained.

Next, FIG. 7 shows a third embodiment of the present invention. In this embodiment, a pair of beam main bars 4 and 4 as X-shaped rebars are connected to each other at a central portion in the longitudinal direction of the beam 2. An example of providing and joining is shown.

That is, in this embodiment, the ends of a pair of beam main bars 4 and 4 constituting the X-shaped reinforcing bar are overlapped with each other at a substantially central portion in the longitudinal direction of the beam 2 to form a lap joint section 20. A predetermined spiral reinforcing bar 21 is wound around the outer periphery of the lap joint portion 20 of the main bar 4 to reinforce it.

In the present embodiment, since the joint between the pair of beam main bars 4 and 4 is the lap joint portion 20, the beam main bar 4 is joined at the time of joining.
Since the end position of the beam can be adjusted along the length direction of the beam main bar 4, the bending portion 6 is accurately arranged at the end edge position of the joint of the column 1 and the beam 2 by absorbing a construction error in advance. Therefore, the quality control becomes easy. Further, by reinforcing the lap joint portion 20 with the spiral reinforcing bar 21, there is an effect of preventing adhesion cracking of the concrete in the vicinity of the lap joint portion 20 after the concrete is poured and hardened.

Next, FIG. 8 shows a fourth embodiment of the present invention. In this embodiment as well, a pair of beam main bars 4 and 4 as X-shaped rebars are connected to each other at the longitudinal center of the beam 2. An example of providing and joining is shown.

That is, also in this embodiment, the pair of beam main bars 4 and 4 constituting the X-shaped reinforcing bar are formed at the substantially central portion in the longitudinal direction of the beam 2.
The end portions of are overlapped with each other to form a lap joint portion 20, and the overlapped portion of the pair of beam main bars 4 in the lap joint portion 20 is fixed with predetermined clips 23 at two ends in the longitudinal direction of the reinforcing bar. It is a thing.

As the clip 23, a known off-the-shelf product may be used, and an appropriate one may be used as long as the overlapping portion of the beam main bar 4 can be clamped and fixed. Further, as shown in FIG. 8, in the pair of lap joint portions 20 of the beam main bars 4 in the upper and lower two steps, the overlapping positions of the beam main bars 4 are vertically symmetrical.

In this embodiment, as in the third embodiment,
Since the position of the end portion of the beam main bar 4 can be adjusted along the length direction of the beam main bar 4, the bending error 6 can be accurately absorbed by preliminarily absorbing the construction error and the edge of the joint between the column 1 and the beam 2. It can be placed in a position, and quality control becomes easy. Further, as described above, the pair of lap joint portions 20 of the upper and lower beam main bars 4 are provided.
By making the overlapping positions of the beam main bars 4 symmetrical with each other in the vertical direction, the eccentricities in the lap joint portion 20 can be offset each other, and the eccentricity can be eliminated as a whole.

In each of the above-mentioned embodiments, the number of beam main bars arranged is arbitrary and can be changed appropriately according to design conditions. Various modifications are possible without departing from the gist of the present invention. Needless to say.

[0027]

The present invention is constructed as described above,
The invention described in claims 1 and 2 can exert the following effects. (1) When joining the ends of each X-shaped reinforcing bar, the end position of each X-shaped reinforcing bar can be moved and adjusted along the longitudinal direction of the beam, so that construction errors are absorbed in advance to ensure accurate bending. Since it can be arranged at the edge of the joint between the column and the beam, accuracy control becomes easy. (2) Since it is a mechanical joint, construction accuracy is improved. Also,
The invention described in claim 3 can exert the following effects. (1) Since the X-shaped reinforcing bar joint is a lap joint part, the end position of the reinforcing bar can be moved and adjusted along the length direction of the reinforcing bar during joining. Can be accurately placed at the edge of the joint between the column and the beam, which facilitates accuracy control. (2) By reinforcing the lap joint with spiral reinforcing bars, it is possible to prevent adhesion cracking of the concrete near the lap joint after the concrete has been poured and hardened. In addition, claim 4
The invention described in claim 5 can exert the following effects. (1) Since the X-shaped reinforcing bar joint is a lap joint part, the end position of the reinforcing bar can be moved and adjusted along the length direction of the reinforcing bar during joining. Can be accurately placed at the edge of the joint between the column and the beam, which facilitates accuracy control. (2) A pair of lap joints of X-shaped rebars with two upper and lower tiers are arranged so that the overlapping positions of the rebars are vertically symmetrical, so that the eccentricities in the lap joints cancel each other out, eliminating the eccentricity as a whole. You can

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a bar and beam arrangement state according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar.

FIG. 3 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar.

FIG. 4 is a conceptual diagram showing a bar and beam reinforcement state according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar.

FIG. 6 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar.

FIG. 7 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar according to a third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a joint portion of an X-shaped reinforcing bar according to a fourth embodiment of the present invention.

FIG. 9 is a conceptual diagram showing a configuration example of a conventional X-shaped bar arrangement.

FIG. 10 is a conceptual diagram showing a configuration example of a conventional X-shaped bar arrangement.

[Explanation of symbols]

 1 Column 2 Beam 3 Beam main bar 4 Beam main bar (X type rebar) 5 Joint part 6 Bending part 7 Bonding plate 8 Bolt 9 Nut 10 Fixing plate 20 Splice joint part 21 Spiral rebar 22 Lap joint part 23 Clip

Claims (5)

[Claims] 1. At least a part of main bars arranged in a longitudinal direction of a beam spanned between pillars of a building cross each other in an X-shape along a vertical plane at a central portion in the longitudinal direction of the beam. Naru X
A structure of a fixing part of a mold bar, wherein both ends of each X-shaped reinforcing bar arranged in parallel in the longitudinal direction of the beam are bolted at a position of the joint between the column and the beam through a predetermined joining plate. And the structure of the fixing portion of the X-shaped bar arrangement, which is formed by crimping and joining with a nut. 2. At least some of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building intersect each other in the X-shape along the vertical plane at the longitudinal central portion of the beam. Naru X
The structure of the fixing portion of the mold bar, wherein the fixing is performed by attaching a predetermined fixing plate at both ends of each X-shaped reinforcing bar arranged in parallel in the longitudinal direction of the beam at the positions of the joints of the pillar and the beam. The structure of the fixing part of the X-shaped bar arrangement characterized by the following. 3. At least some of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building intersect each other in the X-shape along the vertical plane at the longitudinal central portion of the beam. Naru X
In the structure of the joint portion of the type bar, the ends of the respective reinforcing bars constituting the X-shaped reinforcing bar are overlapped with each other at a substantially central portion in the longitudinal direction of the beam, and a spiral is formed on the outer periphery of the ends of the lap joint section. X characterized by winding and reinforcing reinforcing bar
Structure of joint part of type bar arrangement. 4. At least some of the main bars arranged in the longitudinal direction of the beam spanned between the columns of the building intersect each other in the X-shape along the vertical plane at the central portion in the longitudinal direction of the beam. Naru X
In the structure of the joint portion of the type bar, the end portions of the respective reinforcing bars constituting the X-shaped reinforcing bar are overlapped with each other at substantially the center in the longitudinal direction of the beam, and the lap joint section is fixed with a predetermined clip. The structure of the joint part of the X-shaped bar arrangement characterized by the following. 5. The structure of the joint portion of the X-shaped reinforcing bar according to claim 4, wherein the pair of the lap joint portions of the upper and lower two-stage X-shaped reinforcing bars are vertically symmetrical with respect to the overlapping position of the X-shaped reinforcing bars.