JP2019044568A - Bar arrangement structure of reinforcement concrete structure - Google Patents

Abstract

To provide a bar arrangement structure capable of constructing a reinforcement concrete structure having an excellent earthquake performance.SOLUTION: A bar arrangement structure comprises: a main reinforcement body arranged so that M (M≥3) first main reinforcement bars extending in an axis direction form a space in M-prismatic shape extending in an axis direction and form M-gon in a virtual surface orthogonal with the axis direction; a plurality of adjacent inner side shearing reinforcement bars arranged to face an adjacent region interposed with the first main reinforcement bars adjacent each other from inner side of the space and to connect them; a plurality of outer shearing reinforcement bars arranged to face the adjacent region from outer side of the space and to connect from outside the adjacent first main reinforcement bars; and a plurality of second main reinforcement bars mounted on at least one of the inner shearing reinforcement bars and the outer shearing reinforcement bars and extending in the axis direction in the adjacent region enclosed by the first main reinforcement bars, the inner shearing reinforcement bars and the outer shearing reinforcement bars.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reinforcement structure of a reinforced concrete structure.

  In a reinforced concrete column or beam, for example, as described in Patent Document 1, a plurality of main bars extending in the axial direction are arranged. Then, shear reinforcement bars such as a striation and a rib are arranged in a direction perpendicular to the axial direction so as to cover the outside of the main bars. Furthermore, an intermediate shear reinforcement is arranged inside the shear reinforcement.

JP, 2009-144344, A

  In the conventional reinforced concrete structure, the shear reinforcing bars are arranged in a hoop or spiral shape with respect to the main bars. Then, the end portions are bent and fixed by engaging the end portions. When a large seismic load acts on a reinforced concrete structure adopting such a fixing method, it is difficult to effectively suppress the buckling of the main bars. Therefore, it is desirable to provide a bar arrangement structure suitable for obtaining a reinforced concrete structure having higher seismic resistance.

  This invention is made in view of the said subject, and it aims at providing the bar arrangement structure which makes it possible to build the reinforced concrete structure which has the outstanding seismic performance.

  One aspect of the present invention is a reinforcement structure of a reinforced concrete structure, wherein M axially extending first main bars (M ≧ 3) form an M square in a virtual plane orthogonal to the axial direction And an adjacent region between the main bars disposed so as to form an axially extending M-shaped prismatic space and a first main bar adjacent to each other from the inside of the space, 1) A plurality of inner shear reinforcement bars connecting the main bars, a plurality of outer shear reinforcement bars arranged so as to face the adjacent region from the outside of the space, and connecting the adjacent first main bars from the outside, A plurality of second main bars extending axially in the adjacent region surrounded by the inner shear reinforcement and the outer shear reinforcement and attached to at least one of the inner shear reinforcement and the outer shear reinforcement It is characterized by To have.

  In the present invention configured as described above, the first main muscle and the second main muscle are arranged as main muscles. The first main reinforcement forms an M-shaped square in a virtual plane orthogonal to the axial direction and is arranged to form an axially extending M-shaped prismatic space. Then, the inner shear reinforcement bars and the outer shear reinforcement bars are disposed so as to sandwich the adjacent regions sandwiched by the adjacent first main bars from the inside and the outside of the space, respectively, and connect the adjacent first main bars . For this reason, the buckling of the first main bar can be effectively suppressed.

  Also, the second main reinforcement is axially extended in the adjacent region surrounded by the first main reinforcement, the inner shear reinforcement and the outer shear reinforcement, and is attached to at least one of the inner shear reinforcement and the outer shear reinforcement. ing. Therefore, the shear reinforcement bars integrated with the first main bars and having high rigidity provide great resistance to the buckling of the second main bars, and the buckling of the second main bars can be effectively suppressed.

It is a figure which shows 1st Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view of the bar arrangement structure after execution of the process shown in the (a) column of FIG. It is a side view of the bar arrangement structure after execution of the process shown in the (a) column of FIG. It is a figure which shows the rebar structure after execution of the process shown to (b) column of FIG. 1, and is a figure which shows the attachment state of the brace in a rebar structure. It is a top view of the bar arrangement structure after execution of the process shown in the (c) column of FIG. It is a sectional side view of the bar arrangement structure after execution of the process shown in the (c) column of FIG. It is a figure which shows 2nd Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a figure which shows 3rd Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 4th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a side view of the bar arrangement structure shown to FIG. 6A. It is a top view which shows 5th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 6th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 7th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 8th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 9th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 10th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a top view which shows 11th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. It is a figure which shows 12th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. FIG. 11 is a plan view of a rebar structure after execution of the step shown in column (c) of FIG. 10. It is a sectional side view of the bar arrangement structure after execution of the process shown in the (c) column of FIG. It is a figure which shows 13th Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention.

  FIG. 1 is a view showing a first embodiment of a reinforcement structure of a reinforced concrete structure according to the present invention, showing a state in the middle of assembling of the reinforcement structure used for constructing a columnar reinforced concrete structure having a rectangular cross section. ing. As shown in FIG. 1, the reinforcement structure 2 has the vertical direction Z as an axial direction, and four angle steels 3A to 3D extended in the axial direction Z, a plurality of reinforcement bars 4 and an axial direction Z The plurality of reinforcing bars 5 extended to the side and the plurality of braces 71 are provided.

  Each of the angle steels 3A to 3D corresponds to an example of the "first main bar" of the present invention, and is obtained by connecting two steel pieces orthogonally in an imaginary plane orthogonal to the axial direction Z, For example, a steel plate bent at 90 ° can be used. As shown in FIG. 1, the angle steels 3A to 3D are quadrangular (rectangular) in the same imaginary plane (XY plane in FIG. 1) with the ridge line portions (portions connecting steel pieces) directed outward. And a rectangular prism-shaped space SP extending in the axial direction Z. In order to distinguish and explain these four angle steels 3A to 3D, in this specification, the angle steels 3A to 3D are respectively referred to as "first angle steel", "second angle steel", "third angle steel" and "third angle steel". It is called "4 angle steel". A plurality of locking members 40 are fixed by welding or the like along the axial direction Z to the outer peripheral surface of the steel piece constituting each angle steel 3A to 3D, thereby being integrated with the angle steel 3 and will be described next. The tightening member 41 can be locked. In the present embodiment, each locking member 40 is adopted as having a hollow tube structure, but as described below, as long as the locking member 41 can be locked, its shape and structure Etc. is optional.

  2A is a plan view of the rebar structure after execution of the process shown in FIG. 1A, and FIG. 2B is a side view of the rebar structure after execution of the process shown in FIG. is there. The rebar 4 is an adjacent area AR sandwiched between the first angle steel 3A and the second angle steel 3B, an adjacent area AR interposed between the second angle steel 3B and the third angle steel 3C, a third angle steel 3C and a third angle steel In each of the adjacent area AR sandwiched by the four angle steels 3D and the adjacent area AR sandwiched by the fourth angle steel 3D and the first angle steel 3A, a plurality of adjacent areas AR are viewed from the outside of the space SP. They are disposed at substantially equal intervals, and correspond to an example of the “outer shear reinforcement bar” of the present invention.

  Each strip 4 has substantially the same length as the separation distance between the pair of locking members 40 and 40, the tightening member 41, and the pair of locking members 40 fixed to each of the adjacent angle steels 3 and 3. And a hollow tube 42. The tightening member 41 is composed of a PC steel rod 411 and nuts 412 screwed to both ends of the PC steel rod 411. The PC steel rod 411 is used to lock one of the locking member 40, the hollow tube 42 and the other. It extends between the adjacent angle steels, for example, the first angle steel 3A and the second angle steel 3B while penetrating the inside of the member 40, and both ends of the PC steel rod 411 are attached to the locking member 40 by the nuts 412. It is locked to apply tension between the angle steels 3A and 3B. By this tension force, the pair of locking members 40, 40 and the hollow tube 42 are integrated by the angle steels 3A, 3B. Further, other adjacent angle steels are also integrated in the same manner as described above. Thus, as shown in the column (b) of FIG. 1, the PC both ends of the tightening member 41 penetrating the inside of the hollow tube 42 are engaged with the locking members 40 integrated with the adjacent angle steels 3 and 3 respectively. The flanges 3 and 3 adjacent to each other are stopped and integrated by the tension force of the tightening member 41 with the pair of locking members 40 and 40 and the hollow tube 42 interposed therebetween. As a result, buckling of the angle steels 3A to 3D due to seismic load can be effectively suppressed. In addition, in this specification, the structure comprised in this way by four angle steels 3A-3D is called "the main reinforcement 6".

  FIG. 3A is a view showing the rebar structure after execution of the process shown in column (b) of FIG. 1, and is a view showing a bracing attachment state in the rebar structure. FIG. 3B is a plan view of the rebar structure after execution of the step shown in column (c) of FIG. 1, and FIG. 3C is a side of the rebar structure after execution of the step shown in column (c) of FIG. FIG. The bracing 71 made of steel is disposed inside the above-mentioned space SP, and the angle steels 3 and 3 adjacent to each other are connected by bolts 72 to increase the seismic resistance. More specifically, the bracing 71 is disposed to face the adjacent area AR from the inside of the space SP, and the flanges 3 and 3 adjacent to each other are connected by the bolt 72 to increase the seismic resistance. Thus, in the present embodiment, the brace 71 corresponds to an example of the “inner shear reinforcement bar” of the present invention.

  Each adjacent area AR is surrounded by adjacent angle steels 3 and 3, strip 4 and bracing 71 adjacent to each other, and functions as an arrangement area of a plurality of reinforcing bars 5. In the adjacent area AR, a plurality of reinforcing bars 5 are extended in the axial direction Z, which corresponds to an example of the “second main bar” in the present invention. That is, as shown in column (c) of FIG. 1 and FIGS. 3B and 3C, a plurality of reinforcing bars 5 are inserted between the strip 4 and the brace 71 and attached to the strip 4 and the brace 71. The reinforcement bars 4 and the braces 71 not only function as shear reinforcement bars, but also are integrated with the angle steels 3A to 3D as described above to have high rigidity, and act as a large resistance when the reinforcing bars 5 are buckled. And the buckling of the reinforcing bar 5 can be effectively suppressed.

  As described above, in the present embodiment, two main bars (= Y-shaped steel 3A to 3D + reinforcement 5) are provided, but the Y-shaped steels 3A to 3D are firmly connected by the rebar 4 and the bracing 71, Since reinforcing bars 5 are attached to the reinforcing bars 4 and the braces 71 integrally connected to the angle steels 3A to 3D, the strength of the reinforcing bar structure 2 is enhanced to construct a reinforced concrete structure having excellent seismic performance. It has become possible.

  Further, a plurality of through holes 421 communicating the inside of the hollow tube 42 with the outside of the hollow tube 42 are provided in the tube wall of each hollow tube 42. Therefore, when the concrete is cast, the concrete flows smoothly into the hollow tube 42 through the through hole 421 and is filled. As a result, a good reinforced concrete structure is obtained.

  FIG. 4 is a view showing a second embodiment of the rebar structure of the reinforced concrete structure according to the present invention, and shows the rebar structure after the execution of the process shown in the (b) column of FIG. The second embodiment is largely different from the first embodiment in that the crossing angle θ of the strut 71 is different in the height direction. That is, since the vibration mode differs in each part in the axial direction as the reinforced concrete structure becomes longer, the durability against vibration can be enhanced by making the crossing angle of the brace 71 different according to the vibration mode. More specifically, the crossing angle θ2 of the brace 71 at the center in the height direction is smaller than the crossing angle θ1 of the brace 71 at the upper end and the lower end. This can improve the vibration resistance of the reinforced concrete structure.

  FIG. 5 is a view showing a third embodiment of the rebar structure of the reinforced concrete structure according to the present invention, and shows the rebar structure after execution of the process shown in the (b) column of FIG. This third embodiment is largely different from the second embodiment in that a plurality of angle steels 3A to 3D are connected by the joint metal fitting 8. The other configuration is the same as that of the second embodiment. The same reference numerals are given to the same configuration and the description of the configuration is omitted. In the embodiment shown in FIG. 5, although the end faces of the axially adjacent angle steels 3 are connected in a butt state, the end portions may be connected in an overlapping manner. .

  In the first to third embodiments described above, the present invention is applied to a column reinforcing bar structure used to construct a column-shaped reinforced concrete structure having a rectangular cross section, but it has a rectangular cross section. The present invention can be applied to a beam reinforcement structure used to construct a beam-like reinforced concrete structure. Further, the present invention can be applied to a reinforcement structure used to construct a reinforced concrete structure having a column portion and a beam portion (fourth embodiment). In the following, the fourth embodiment of the present invention will be described with reference to FIGS. 6A and 6B, focusing on the differences from the first embodiment, and mounting of the braces 71 and the reinforcing bars 5 performed in the same manner as the first embodiment. The illustration and the description thereof will be omitted (the same applies to the fifth to eleventh embodiments described later).

  FIG. 6A is a plan view showing a fourth embodiment of a rebar structure of a reinforced concrete structure according to the present invention, and FIG. 6B is a side view of the rebar structure shown in FIG. 6A. In these drawings, the rebar structure is shown after performing substantially the same process as the process shown in column (a) of FIG. 1 (this point will be described later with reference to FIG. 7A, FIG. 7B, FIG. 7C, FIG. 7D, FIG. 8A, FIG. 8B and FIG. The bar arrangement structure 2 is obtained by connecting a column bar arrangement structure 21 having the above-described column bar arrangement structure and a beam rebar structure 22 having the above-mentioned beam arrangement structure. The column reinforcement structure 21 has the same arrangement structure as that of the first embodiment. That is, the column reinforcing member structure 21 is arranged so as to form a quadrangle (rectangle) in a virtual plane perpendicular to the axial direction (vertical direction Z) with the ridge line portion directed inward. It is composed of orthogonal angle steels 3A to 3D, a plurality of strip bars 4 and a reinforcing bar 5. On the other hand, the beam reinforcement structure 22 has the same arrangement structure as that of the first embodiment except that the axial direction is different and that a rib is used as a shear reinforcement. That is, the beam reinforcing structure 22 is disposed in a rectangular shape so as to form a quadrilateral in a virtual plane perpendicular to the axial direction (horizontal direction X) with the ridge line portion directed outward, that is, in a rectangular shape It comprises the orthogonally shaped angle steels 3A to 3D, a plurality of ribs 4A, and a reinforcing bar (not shown). In the present embodiment, the end portions of the angle steels 3A and 3B of the beam reinforcement structure 22 on the column reinforcement structure 21 side are connected by the welds 9 to the angle steel 3A of the column reinforcement structure 21 At the same time, the end portion of the beam reinforcement structure 22 at the side of the column reinforcement 21 of the angle steel 3C, 3D is connected to the angle reinforcement steel 3D of the column reinforcement 21 by the welds 9, The bar arrangement structure 22 is connected to the column bar arrangement 21. In addition, although the main reinforcement is configured using the beam reinforcement structure 22 of all sizes similarly to the first embodiment, in the beam reinforcement structure 22, the angle steel located at the upper side is used. The main muscle may be configured using a smaller size than that located below. Also, the structure of the rib 4A is identical to that of the band muscle 4 and the rib 4A is substantially identical to that of the band muscle 4.

  By having the bar arrangement 2 (= column bar structure 21 + beam beam bar 22 + welding portion 9) configured as described above, the same function and effect as the above-described embodiment can be obtained. That is, it is possible to increase the strength of the reinforcement structure 2 and construct a reinforced concrete structure having excellent seismic performance. In addition, at the time of casting concrete, the concrete can be made to flow smoothly and be filled inside the hollow pipe 42 through the through hole 421 provided in the hollow pipe 42, and a good reinforced concrete structure is obtained. Be

  In the fourth embodiment, the present invention is applied to the bar arrangement 2 in which one beam bar arrangement 22 is connected to the column bar arrangement 21. The number of connections and connection modes of the beam reinforcing bar structure 22 to the structure 21 are not limited to the above, and can be applied to the reinforcing bar structure 2 as shown in FIGS. 7A to 7D, for example. (Fifth to eighth embodiments). The reference numerals 23 to 25 in FIGS. 7A to 7D indicate beam reinforcing structures, and the beam reinforcing structures 23 to 25 are also configured the same as the beam reinforcing structure 22 described above. There is.

  In the fourth to eighth embodiments, the beam reinforcement structures 22 to 25 are directly connected to the column reinforcement structures 21 by welding the angle steels 3 to each other. For example, as shown in FIGS. 8A and 8B, the first auxiliary steel pieces 10 are attached to the angle steels 3 adjacent to each other in the column rebar structure 21, and the second auxiliary steel pieces are further attached to the first auxiliary steel pieces 10. After mounting 11, the angle steels 3 of the beam reinforcing structure 22 to 25 may be fixed to the second auxiliary steel piece 11 (ninth and tenth embodiments). As described above, the beam reinforcement structures 22 to 25 may be indirectly connected to the column reinforcement structure 21 via the first auxiliary steel piece 10 and the second auxiliary steel piece 11. In addition, about connection and fixation of those, connection means, such as a volt | bolt 12 and welding, can be used, for example.

  Furthermore, in order to reinforce the first main reinforcement in the column reinforcement 21 and / or the beam reinforcement 22-25, in addition to the brace 71, for example, as shown in FIG. Another bracing 73 may be provided between the angle steels 3 facing each other in a vertical imaginary plane (the plane in the same figure) (an eleventh embodiment). In addition, the code | symbol 94 in FIG. 9 is an engagement metal fitting for fixing the brace 73, and is being fixed to the angle steel 3 by welding etc. FIG.

  By the way, in the above embodiment, although the strip 4 and the rib 4A are constituted by the tightening member 41 and the hollow tube 42, the strip 4 and the rib 4A are extended in the orthogonal direction orthogonal to the axial direction Z. A rigid connecting member made of metal such as a steel plate or a steel rod may be used (12th embodiment). The twelfth embodiment of the present invention will be described below with reference to FIGS. 10, 11A and 11B.

  FIG. 10 is a view showing a twelfth embodiment of a rebar arrangement structure of a reinforced concrete structure according to the present invention. 11A is a plan view of the rebar structure after execution of the process shown in column (c) of FIG. 10, and FIG. 11B is a side view of the rebar structure after execution of the process shown in column (c) of FIG. FIG. A great difference between this twelfth embodiment and the first embodiment is that a belt-like steel plate 4B is used as the "outside shear reinforcement bar" of the present invention, and the other configuration is basically the same as the first embodiment. is there. In the rebar structure 2 in the twelfth embodiment, as shown in FIG. 10, the angle-shaped steels 3A to 3D are in the same virtual plane with the ridge line parts (parts connecting the steel pieces) directed outward. It is arranged to form a square (rectangular) and to form a square columnar space SP extending in the axial direction Z. Further, as shown in column (a) of FIG. 10, the steel plate 4B is sandwiched between the adjacent area AR sandwiched between the first angle steel 3A and the second angle steel 3B, the second angle steel 3B and the third angle steel 3C. In each of the adjacent areas AR sandwiched between the third adjacent angle steel 3C and the fourth angle steel 3D and the adjacent areas AR interposed between the fourth angle steel 3D and the first angle steel 3A, the adjacent areas AR A plurality of pieces are arranged at substantially equal intervals so as to be exposed from the outside of the space SP, and corresponds to an example of the “outside shear reinforcement bar” of the present invention.

  Each steel plate 4B is fixed to one of the angle steels 3 and 3 whose one ends are adjacent to each other by a fastening member (not shown) such as a bolt or welding or by welding, and the other of the angle steels 3 and 3 whose other ends are adjacent It is fixed by fastening members (illustration omitted), such as a volt | bolt, and welding etc., and is united by double angle steel 3, 3 by this. Further, other adjacent angle steels are also integrated in the same manner as described above. Thus, as shown in column (b) of FIG. 10, the four angle steels 3 are integrated by the plurality of steel plates 4B to form the main reinforcement 6. As a result, buckling of the angle steels 3A to 3D due to seismic load can be effectively suppressed.

  Also in the twelfth embodiment, as in the first embodiment, the bracing 71 made of steel material is disposed inside the above-mentioned space SP, and the angle steels 3 and 3 adjacent to each other are connected by the bolts 72 for earthquake resistance I am strengthening the strength. More specifically, the bracing 71 is disposed to face the adjacent area AR from the inside of the space SP, and the flanges 3 and 3 adjacent to each other are connected by the bolt 72 to increase the seismic resistance. Thus, in the present embodiment, the brace 71 corresponds to an example of the “inner shear reinforcement bar” of the present invention.

  Each adjacent area AR is surrounded by adjacent angle steels 3 and 3, steel plate 4B and bracing 71 adjacent to each other, and a plurality of reinforcing bars 5 are disposed in each adjacent area AR. These reinforcing bars 5 correspond to an example of the “second main bar” of the present invention extended in the axial direction Z, and as shown in column (c) of FIG. 10, FIG. 11A and FIG. 11B, steel plate 4B And the brace 71, and attached to the steel plate 4B and the brace 71. The steel plate 4B and the brace 71 not only function as a shear reinforcement but also integrated with the angle steels 3A to 3D as described above to have high rigidity, and act as a large resistance when the reinforcing bar 5 is buckled. And the buckling of the reinforcing bars 5 can be effectively suppressed.

  As described above, in the present embodiment, two main bars (= Y-shaped steel 3A to 3D + reinforcement 5) are provided, but the Y-shaped steels 3A to 3D are firmly connected by the steel plate 4B and the brace 71 and Reinforcing bar 5 is attached to steel plate 4B and bracing 71 integrally connected to steels 3A to 3D, so it is possible to enhance the strength of arrangement structure 2 and construct a reinforced concrete structure having excellent seismic performance. It has become. In the twelfth embodiment, the steel plate 4B is used as a rigid connecting member made of metal, but in addition to this, a metal product such as a steel rod may be used, and this point is the same as in the modification described later. .

  The present invention is not limited to the above-described embodiment, and various modifications can be made other than the above without departing from the scope of the invention. For example, in the above embodiment, angle steels 3A to 3D are used as the "first main bar" of the present invention, but steel rods having a rectangular cross section in a virtual plane orthogonal to the axial direction may be used instead of angle steels. Good.

  Further, in the first to eleventh embodiments, although all of the strip 4 and the rib 4A have the tightening member 41 and the hollow tube 42, for example, one of the strip 4 and the rib 4A The part may be constituted only by the tightening member 41. Further, instead of the PC steel rod 411 constituting the tightening member 41, a threaded rebar, a steel wire or the like may be used. Furthermore, a part of the strip 4 and the rib 4A may be configured by the steel plate 4B.

  Further, in the above embodiment, the reinforcement structure used to construct a reinforced concrete structure having a rectangular cross section has been described, but the present invention is also applicable to reinforced concrete structures having other cross sectional shapes. It can apply. That is, in the case of a reinforced concrete structure having a cross section of M square (M ≧ 3), prepare M first main bars (angular steel, rectangular cross section steel bar, etc.) and place M square in a virtual plane orthogonal to the axial direction It may be arranged to form an M-shaped prism-like space SP extending in the axial direction Z as well as being formed.

  Moreover, in the said embodiment, although the steel plate member is made to cross and the brace 71 which has "X" shape by side view is used, for example, as shown to FIG. 11C, the brace 71 which arrange | positions the steel plate member in the non-cross state. The 13th embodiment may be used.

  Further, in the first to twelfth embodiments described above, the strip 4, the ribs 4A and the steel plate 4B are used as an example of the “outside shear reinforcement” of the present invention and the strut 71 is used as the “inner shear reinforcement of the present invention These relationships may be reversed. That is, you may use the stripe 71, the rib 4A, and the steel plate 4B as an example of the "inner side shear reinforcement" of this invention, and use the brace 71 as the "outside shear reinforcement" of this invention. Furthermore, in arranging each shear reinforcing bar, the strip 4, the rib 4A, the steel plate 4B, and the brace 71 may be mixed.

  Moreover, in the said embodiment, although the reinforcement 5 is attached to both an inner side shear reinforcement and an outer side shear reinforcement, you may comprise so that it may attach only to one of them.

  As described above, in the above-described embodiment, the angle steels 3A to 3D correspond to an example of the "first main bar" of the present invention, and the reinforcing bars 5 correspond to an example of the "second main bar" of the present invention. . Also, the square-pillar-shaped space SP corresponds to an example of the “M-square-pillar-shaped space” in the present invention. Also, for example, the horizontal direction orthogonal to the axial direction Z in the first embodiment corresponds to an example of the “orthogonal direction” in the present invention. Further, the direction of the intersection angle corresponds to an example of the “cross direction” in the present invention.

  The present invention can be applied to the overall arrangement of reinforced concrete structures.

2 ... Reinforcement structure 3 ... Yamagata steel (1st main bar)
3A ... 1st angle steel 3B ... 2nd angle steel 3C ... 3rd angle steel 3D ... 4th angle steel 4 ... band bar (shear reinforcement)
4A ... ribs (shear reinforcement)
4B ... Steel plate (rigid connection member made of metal)
5 Rebar (2nd main bar)
6 Main reinforcement body 21 Reinforcement structure for columns 22 to 25 Reinforcement structure for beams 71 Braces (shear reinforcing bars)
DESCRIPTION OF SYMBOLS 40 ... Locking member 41 ... Clamping member 42 ... Hollow pipe 411 ... PC steel rod 412 ... Nut 421 ... Through-hole X ... Horizontal direction (axial direction of beam)
Z ... vertical direction (axis direction of column)

Claims (4)

In order to form M square (M ≧ 3), M square (M を 3) in the imaginary plane orthogonal to the axial direction and M rectangular columnar space extending in the axial direction. , With the main muscle placed,
A plurality of inner shear reinforcement bars disposed so as to face from the inside of the space an adjacent area sandwiched between the first main bars adjacent to each other, and connecting the adjacent first main bars;
A plurality of outer shear reinforcement bars disposed so as to face the adjacent area from the outside of the space and connecting the adjacent first main bars from the outside;
The axial extension is provided in the adjacent area surrounded by the first main reinforcement, the inner shear reinforcement and the outer shear reinforcement, and is attached to at least one of the inner shear reinforcement and the outer shear reinforcement Reinforcing bar structure of a reinforced concrete structure, comprising: a plurality of second main bars; It is a reinforcement structure of the reinforced concrete structure according to claim 1,
One of the inner shear reinforcement bar and the outer shear reinforcement bar is a strip extending in an orthogonal direction orthogonal to the axial direction, and the other diagonally intersects the orthogonal direction and the axial direction Reinforcement structure of reinforced concrete structure which is a brace extending in the cross direction. It is a reinforcement structure of the reinforced concrete structure of Claim 2, Comprising:
The strip is a hollow extending in the orthogonal direction between a pair of locking members fixed to each of the first main bars adjacent in the orthogonal direction, and the pair of locking members A tube, and a tightening member which is engaged with the locking member at both ends thereof so as to penetrate the inside of the hollow tube so as to apply tension, and the first adjacent ones of the first adjacent ones are moved by the tension of the tension member. An arrangement structure of reinforced concrete structure in which the pair of locking members and the hollow pipe are integrated by sandwiching the main bars. It is a reinforcement structure of the reinforced concrete structure of Claim 2, Comprising:
The strip has a metal rigid connecting member extending in the orthogonal direction,
The reinforcement structure of the reinforced concrete structure where the both ends of the said rigid connection member are fixed to each of the adjacent said 1st main bars, and unify the said adjacent said 1st main bars.

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