JP2004092102A - Joint structure of reinforced concrete member, attachment used for the joint structure, and replacement reinforcing bar - Google Patents

Abstract

The present invention relates to a reinforced concrete structural member, which is deformed by a force acting on the reinforced concrete member to cause damage to the concrete reinforcing bar. The deformation is absorbed by extending the reinforced concrete separately from the reinforced concrete to prevent the concrete from being damaged. In addition, the maintenance and repair work can be easily performed, the life of the building structure can be extended, and even if the building is damaged by an earthquake or the like, it can be easily restored.
In a reinforced concrete member joining structure for joining a reinforced concrete member (a reinforced concrete column or the like) 1 to a fixing portion, an upper main reinforcing bar in a reinforced concrete column and a lower main reinforcing bar in a fixing portion oppose each other. Attachments 6 and 7 are fixed to the lower end and the upper end, respectively, and both ends of the replacement reinforcing bar 8 are detachably attached to the attachments 6 and 7, respectively. The replacement reinforcing bar 8 is attached by the protective cover 11 so as not to adhere to the surrounding concrete, and can be deformed without causing concrete damage.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, a joint structure between a reinforced concrete member such as a column or a beam in a reinforced concrete structure and a fixing portion, such as a joint structure in which a reinforced concrete column in a building structure is erected on a foundation portion. It relates to the attachments used and the replacement bars.
[0002]
[Prior art]
In recent years, the spread of architectural structures such as condominiums has been remarkable, and at the same time, the life span of rebuilding due to their aging, effective countermeasures against earthquakes, and the like have become problems, and are being studied from various viewpoints. In terms of the strength of building structures, in addition to materials and strength issues such as pillars and beams, it is essential to consider material-level joining, member-level joining, and structural-level joining. Often governs the performance of building structures.
[0003]
Among these, the joining at the structure level includes connection between structural members such as columns and beams, or joining between the structural members and the fixing portion. In this specification, the fixing unit refers to a foundation, ground, or the like. FIG. 7A shows an example of a joining structure for joining a conventional reinforced concrete column to a fixing portion. The reinforced concrete column 35 is reinforced by a reinforcing bar composed of a plurality of main bars (column main bars) 36 extending vertically and a band bar (bar wound in a horizontal plane) 37. In such a conventional reinforced concrete pillar 35, the main reinforcement 36 extends from the pillar 35 to the fixing part 38 and is buried in the concrete 39 cast in the fixing part 38.
[0004]
[Problems to be solved by the invention]
By the way, reinforced concrete members such as columns and beams in a reinforced concrete structure are composite members of concrete and rebar. The rebar mainly exhibits its toughness against tensile force, and concrete supports compressive force.
[0005]
However, for example, in the case of a pillar 35 of a building structure standing on the anchoring portion 38, when a horizontal force is applied due to an earthquake or other various causes, as shown in FIG. The bending moment and the shearing force are concentrated on the portion 40, and the portion 40 is easily damaged.
[0006]
Conventionally, damage to this part has a considerable effect on the reduction in the strength and rigidity of the entire building structure, and requires extensive repair work and, in some cases, rebuilding of this part.
[0007]
An object of the present invention is to solve such a conventional problem. Along with the deterioration of a reinforced concrete structure, a bending moment or a shear force is repeatedly applied to a joint, or the joint is concentrated by an earthquake or the like. It is an object of the present invention to realize a joint structure of reinforced concrete that can be easily maintained and repaired even if a member end is damaged as a result of a bending moment or a shearing force applied thereto. The `` joining portion '' between the reinforced concrete member and the anchoring portion such as the foundation usually refers to a boundary portion between the reinforced concrete member and the anchoring portion, but the joining portion of the present invention refers to a portion of the joining structure of the reinforced concrete member described later. Shall say.
[0008]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a joint structure of a reinforced concrete member for joining a reinforced concrete member to a fixing portion, wherein a connection between the main reinforcement in the reinforced concrete member and the main reinforcement in the fixing portion is provided. A joint structure for a reinforced concrete member, wherein a replacement reinforcing bar is detachably provided.
[0009]
Attachments are fixed to respective opposite ends of the main reinforcing bars in the reinforced concrete member and the main reinforcing bars in the fixing portion, and both ends of the replacement reinforcing bar are detachably attached to the attachment. It may be.
[0010]
The replacement reinforcing bar is provided in a groove formed on an outer surface of the reinforced concrete member, and a cover plate is mounted on an outer surface of a portion of the reinforced concrete member to which the replacement reinforcing bar is attached, and the cover plate is a mortar. Alternatively, it may be configured to be fixed with concrete.
[0011]
The present invention is an attachment and a replacement reinforcing bar for connecting a main bar in the reinforced concrete member and a main bar in the fixing unit in a joint structure of a reinforced concrete member for connecting a reinforced concrete member to a fixing unit to solve the above problem, The attachment is fixed to opposing ends of a main reinforcing bar in the reinforced concrete member and a main reinforcing bar in the anchoring portion, and the replacement reinforcing bar is attached to the attachment at both ends thereof. Attachment and replacement rebar are provided.
[0012]
The attachment has a box shape in which one surface is opened and a U-shaped hole is formed at the bottom, and the replacement reinforcing bar includes a reinforcing bar main body and upper and lower heads, and the reinforcing bar main body includes the U-shaped hole. , And the head is inserted into the attachment.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments relating to a joint structure of a reinforced concrete member according to the present invention, and an attachment and a replacement reinforcing bar used in the joint structure will be described below based on examples with reference to the drawings.
[0014]
FIG. 1 is a diagram illustrating an outline of a joint structure of a reinforced concrete member according to the present invention, using a joint structure 3 that joins a reinforced concrete column 1 as an example of a reinforced concrete member to a fixing unit 2 so as to stand up. The reinforced concrete column 1 is reinforced with main reinforcing bars 4 and band reinforcing bars (not shown) in the same manner as ordinary reinforced concrete columns.
[0015]
In this joint structure 3 of reinforced concrete members, an attachment 6 is fixed to a lower end of a main reinforcing bar (referred to as “upper main reinforcing bar”) 4 buried in the reinforced concrete column 1, and a main reinforcing bar buried in the anchoring portion 3 (this is called “upper main reinforcing bar”). Attachment 7 is fixed to the upper end of lower main bar 5). A replacement reinforcing bar 8 is detachably mounted between the two attachments 6 and 7.
[0016]
The attachments 6 and 7 and the replacement rebar 8 may have various structures, respectively. In the example of FIG. 1, the attachments 6 and 7 are substantially box-shaped, while the heads 9 are arranged above and below the replacement rebar 8. The head 9 is inserted into and attached to the attachments 6 and 7 from the side, and is detachable.
[0017]
According to the joint structure 3 of the reinforced concrete member having such a structure, the replacement reinforcing bar 8 becomes fatigued due to the repeated bending moment or shear force acting on the joint structure 3 in which the column 1 is joined to the anchoring portion 2. If the replacement bar 8 is damaged, it can be replaced relatively easily with another new replacement bar 8. Therefore, the joint structure 3 of the reinforced concrete member can maintain a predetermined joint strength even if it is used for many years, and the building structure can be continuously used.
[0018]
(Example)
2 to 6 are diagrams showing the configuration of the embodiment according to the present invention. FIG. 2 shows the structure of the attachments 6, 7 and the replacement reinforcing bar 8 used in the joint structure 3 of the reinforced concrete member according to the present invention. FIG. FIG. 2A shows the replacement reinforcing bar 8 and its AA sectional view. This replacement reinforcing bar 8 is formed of a reinforcing bar main body 10 and upper and lower heads 9.
[0019]
The reinforcing bar main body 10 may have the same cross-sectional structure, thickness and material as the main reinforcing bars 4 and 5 used for the reinforced concrete columns 1 and the anchoring portion 2 of the building structure, or may have a different cross-sectional structure, thickness or material. . The upper and lower heads 9 are formed in a rectangular piece shape having a larger cross-sectional area than the reinforcing bar main body 10, and are formed integrally with the reinforcing bar main body 10.
[0020]
Although not shown, the reinforcing bar main body 10 may be configured by welding the reinforcing bar main body 10 and the upper and lower heads 9 separately to each other, or by forming a male screw on the upper and lower sides of the reinforcing bar main body 10, and forming the upper and lower heads. A female screw may be formed in 9, and the upper and lower heads may be screwed to the rebar main body 10. Also in this case, it is preferable that the threaded portion is welded to prevent loosening.
[0021]
When used for the actual replacement bar 8, as shown in FIG. 2 (b) along with a cross-sectional view taken along the line BB, the bar body 10 of the replacement bar 8 is covered with a protective cover (or a protective cylinder) 11 for use. . The protective cover 11 is made of a corrosion-resistant plastic or metal material. Alternatively, a flat plate formed of these materials may be wound around the reinforcing bar main body 10, and the edges thereof may be thermally fused to each other to form a tubular shape and attached. When the reinforcing bar main body 10 and the upper and lower heads 9 are separate bodies, the head 9 may be attached after inserting the reinforcing bar main body 10 into the protective cover 11.
[0022]
One of the features of the replacement reinforcing bar 8 according to the present invention is that it is protected by the protective cover 11 and does not adhere to surrounding concrete or the like (such as pre-cast concrete 24 or mortar to be described later). Since it is possible to expand and contract independently, the concrete of the concrete member (the concrete column 1 in the embodiment) is less likely to be damaged.
[0023]
FIG. 2C is a perspective view of the attachment 6, and FIG. 2D is a diagram illustrating the front, side, and bottom of the attachment 6, respectively. The attachment 6 has a substantially box shape having a space therein, and includes left and right side walls 12, a rear wall 13, a top wall 14, and a bottom wall 15, and an opening 16 is formed in the front.
[0024]
The attachment 7 has exactly the same structure as the attachment 6, and since the attachment 6 is fixed to the lower end of the upper main reinforcement 4, the attachment 7 is in the state shown in FIG. 2 (c), but the attachment 7 is fixed to the upper end of the lower main reinforcement 5. 2C, the vertical direction is reversed (see FIG. 3A), and the top wall 14 is located below and the bottom wall 15 is located above.
[0025]
A female screw hole 17 is formed in the top wall 14 so that it can be screwed into a male screw 18 formed at the lower end of the upper main reinforcement 4 and the upper end of the lower main reinforcement 5. Although not shown, the upper main bar 4 or the lower main bar 5 may be fixed directly to the top wall 14 as a structure for fixing the upper main bar 4 or the lower main bar 5 to the top wall 14, or the upper main bar 4 and the attachment 6, and the lower main bar The attachment 4 and the attachment 7 may have an integral structure.
[0026]
A substantially U-shaped hole 19 is formed in the bottom wall 15 of the attachment 6, opening to the front side and having a slightly larger width than the reinforcing bar main body 10 of the replacement reinforcing bar 8. On the lower surface of the U-shaped hole 19, a guide edge 20 projecting downward is formed.
[0027]
FIG. 3 shows a structure in which the upper and lower main reinforcements 4 and 5 and the attachments 6 and 7 are fixed at the time of use, and shows a structure when the replacement rebar 8 covered with the protective cover 11 is set between the attachments 6 and 7. FIG. FIG. 3A is a perspective view showing a state in which upper and lower attachments 6 and 7 are screwed and fixed to upper and lower main reinforcements 4 and 5.
[0028]
FIG. 3B is a perspective view showing a state in which a replacement reinforcing bar 8 is mounted between the upper and lower attachments 6 and 7 fixed to the upper and lower main reinforcing bars 4 and 5, and FIG. FIG. FIG. 3D is a cross-sectional view taken along the line AA in FIG. The upper and lower heads 9 of the replacement rebar 8 are inserted into the upper and lower attachments 6 and 7 from the front opening 16, and the rebar main body 10 of the replacement rebar 8 is guided by the guide edge 20 and is inserted into the U-shaped hole 19. , The replacement reinforcing bar 8 is detachably mounted.
[0029]
4 to 6 show an embodiment of a joint structure of a reinforced concrete member according to the present invention using the attachment 6 and the replacement reinforcing bar 8 described above. The reinforced concrete column 1 of a building structure is fixed to a fixing portion (a base portion or the like). It is a figure explaining the joining structure of the reinforced concrete member for standing up to 2 and fixing. FIG. 4 is a cross-sectional view of the joint structure 21 of the reinforced concrete member in which the reinforced concrete column 1 stands upright on the anchoring portion 2. FIG. 5A is a cross-sectional view of FIG. 4, and FIG. This is shown in FIG. FIG. 6 is an enlarged view of a main part of FIG.
[0030]
As shown in FIG. 4, the upper main bar 4 and the lower main bar 5 are attached to the corner 22 of the column 1 and the midpoint 23 of the side of the column 1 with the attachments 6 and 7 screwed to the lower and upper ends thereof. It is arranged and buried in the pre-cast concrete 24 and the anchoring section 2. The state in which the upper main reinforcement 4 is buried in the pre-cast concrete 24 is clearly shown in FIG. In this embodiment, the positions where the upper main reinforcement 4 and the lower main reinforcement 5 are arranged are the corner 22 of the pillar 1 and the midpoint 23 of the side of the pillar 1 in this embodiment. Even if it is not, any other position may be used as long as it is around the column 1 (reinforced concrete member).
[0031]
As shown in FIGS. 5A and 5B, the replacement reinforcing bar 8 includes an upper main reinforcing bar 4 and a lower main point reinforcing bar 5 arranged at a corner 22 of the column 1 and a midpoint 23 of a side of the column 1. The upper main reinforcing bar 4 and the lower main reinforcing bar 5 are connected at these respective positions.
[0032]
As described above, the plurality of straps 25 are arranged at regular intervals in the vertical direction so as to surround the periphery of the plurality of upper main bars 4 arranged at the corners 22 of the pillar 1 and the midpoints 23 of the sides, It is buried in precast concrete 24. Note that, in addition to the upper main reinforcement 4 and the strip reinforcement 25, various types of reinforcement such as a shear reinforcement reinforcement and a core reinforcement are usually incorporated in the reinforced concrete column 1, but these reinforcements are not shown.
[0033]
In this embodiment, as shown in FIG. 4, apart from the replacement reinforcing bar 8, a plurality of adhesion assisting reinforcing bars 41 are vertically arranged in the vicinity of the replacement reinforcing bar 8. And is embedded in the pre-cast concrete 24. The upper end of the auxiliary adhesion stud 41 extends slightly above the replacement reinforcing bar 8 and is embedded in the precast concrete 24. The lower end is near the lower end of the concrete column member 21. The fixing unit 2 is arranged so as not to extend into the inside of the unit 2 but to extend slightly near the surface of the fixing unit 2.
[0034]
Since the adhesion assisting muscle 41 that does not extend to the inside of the fixing unit 2 is arranged in this way, when a force such as a bending moment or a shearing force is applied from the outside due to an earthquake or the like, the deformation due to the force is reduced by the adhesion assisting muscle. Near the lower end of 41, near the lower end of the joint structure 3 of the reinforced concrete columns 1, damage to the portion of the reinforced concrete column 1 above the joint structure 3 of the reinforced concrete members can be prevented.
[0035]
In the vertical region where the replacement reinforcing bar 8 is mounted, the cross section (eg, AA cross section in FIG. 4) is a cross section of the pre-cast concrete 24 (eg, CC cross section in FIG. 4. This cross section is The area is slightly smaller, and the outer surface is recessed inward by a thickness substantially equivalent to the thickness of a cover plate 26 described later.
[0036]
As shown in FIGS. 5 and 6, a concave groove 27 is formed on the outer surface of the precast concrete 24 at the corner 22 and the midpoint 23 of the side of the column 1 on which the replacement reinforcing bar 8 is mounted. . The cross-sectional area of the concave groove 27 is slightly larger than the area of the horizontal cross section of the attachment 6. In the concave groove 27, the respective attachments 6, 7 screwed to the upper main bar 4 and the lower main bar 5 are exposed such that the openings 16 thereof face outward.
[0037]
The replacement reinforcing bar 8 is mounted on the concrete column 1 in which the upper main bar 4 and the lower main bar 5 are buried in the pre-cast concrete 24 as described above. To install the replacement bar 8, the upper and lower heads 9 of the replacement bar 8 are inserted into the upper and lower attachments 6, 8 from the respective openings 16, and the reinforcing bar main body 10 of the replacement bar 8 is attached to the guide edge 20. It is performed by being guided and inserted into the U-shaped hole 19 and the concave groove 27.
[0038]
Then, the strap 25 is assembled so as to surround the plurality of replacement reinforcing bars 8 and the pre-cast concrete 24. Further, from the outside, the pair of left and right cover plates 26 are mounted so as to be fitted into the recessed portions having the small cross-sectional area of the column 1 so as to sandwich the column 1 from the left and right. The cover plate 26 has a concave horizontal sectional shape, and is formed in advance of a material such as reinforced concrete or steel.
[0039]
An inclined surface 28 is formed at the inner end of the cover plate 26, and when the pair of cover plates 26 is mounted, as shown in FIGS. An opening groove 29 is formed. In addition, as shown in FIG. 6A, an inclined surface 30 is formed on the edge of the pre-cast concrete corresponding to the widened opening groove 29, so that a mortar filling operation and the like described later can be performed. Easy to do.
[0040]
FIG. 6A shows a state in which a pair of cover plates 26 are mounted, and FIG. 6B shows a cross section taken along line AA. When the pair of cover plates 26 are mounted, a space 31 is formed between the precast concrete 24 and the cover plate 26 as shown in FIGS. 6 (a) and 6 (b). A mortar (or concrete) 33 is filled into the space 31, the concave groove 27, and the expanded open groove 29 from the opening 32 with the expanded open groove 29 and the inclined surface 30 thereabove. Set up.
[0041]
The state after the mortar 33 is cast is shown in FIG. 6C and FIG. The cover plate 26 is fixed to the column 1 by the mortar 33 by driving the mortar 33 into the open groove 29. In this case, since the expanded opening groove 29 is expanded in a tapered shape, the expanded inclined surface 30 has a larger contact area with the mortar 33, so that the pair of cover plates 26 is stronger. Is fixed to the column 1.
[0042]
A reinforcing fiber material 34 is further wound around the pair of cover plates 26 fixed in this manner and the outer periphery of the mortar 33 casting surface of the expanded opening groove 29 that is formed. The fiber reinforcement 34 protects the pillars 1 such as waterproof and moisture-proof, and may be coated with an adhesive on the outer surface of the cover plate 26 or the like from the outside and adhered while being wound, or may be a fiber reinforcement in advance. An adhesive may be applied to the inner surface of 34. In this manner, the joint structure 21 of the reinforced concrete member between the reinforced concrete column 1 and the anchoring portion 2 as shown in FIGS.
[0043]
According to the joint structure 21 of the reinforced concrete column 1 according to the present invention having the above-described configuration, the replacement reinforcing rod 8 is fatigued due to repeated bending moments and shearing forces acting on the joint structure 21, and the joint reinforcement 21 becomes larger due to an earthquake. Even if the replacement rebar 8 is damaged due to a bending moment or a shearing force, by replacing the replacement rebar 8 with a new one, it is possible to maintain a predetermined joint strength even when used for a long time, and to provide a long-lasting construction structure. Enables continuous use.
[0044]
When performing the replacement work of the replacement reinforcing bar 8, first, the reinforcing fiber material 34 is peeled off, the mortar 33 filled in the expanded opening groove 29 and the like is broken and removed, and the pair of cover plates 26 are removed. Further, the mortar 33 filled in the space 31 and the like is broken and removed. Then, the replacement bar 8 that has been damaged or fatigued is removed from the attachments 6, 7 or the inside of the groove 27 and replaced with a new replacement bar 8.
[0045]
As described above, the embodiments of the joint structure of the reinforced concrete member according to the present invention and the attachments and the replacement reinforcing bars used for the joint structure have been described based on the examples, but the present invention is limited to such examples. It goes without saying that there are various embodiments within the scope of the technical matters described in the claims.
[0046]
For example, the attachment and the replacement reinforcing bar have a structure in which opposing ends of respective main reinforcing bars are detachably connected to join a reinforced concrete structural member (a column, a beam, or the like) and a fixing member, or different reinforced concrete structural members. The attachment and the replacement reinforcing bar need not have the structure of the above embodiment. For example, a configuration may be employed in which the attachment and the replacement reinforcing bar can be joined by using fixing means such as a clamp, a clip, and a screw.
[0047]
Further, in the reinforced concrete structural members (columns, beams, etc.), the arrangement of the replacement reinforcing bars is not limited to the corners or the midpoints of the sides as in the embodiment, but is concentrated on the side surface which receives a large bending moment or shear force. The arrangement may be appropriately selected as necessary, such as arrangement. Alternatively, the mortar or concrete may be directly cast and covered without providing a protective cover.
[0048]
【The invention's effect】
According to the joint structure of the reinforced concrete member according to the present invention having the above-described configuration, and the attachment and the replacement reinforcing bar used for the joint structure, the following effects are obtained.
[0049]
(1) Even if the reinforced concrete structure is deteriorated and the joint is damaged as a result of repeated shearing force acting on the joint or intensive bending moment or shearing force due to an earthquake or the like, By attaching new replacement reinforcing bars to the attachment, maintenance and repair work can be easily performed, so that the life of the building structure in terms of structural strength can be extended, and damage due to earthquakes etc. can be reduced, making it easier. Can be recovered.
[0050]
(2) Since the replacement reinforcing bar according to the present invention does not adhere to the surrounding concrete or the like and can be extended separately from the concrete or the like, it is possible to suppress the occurrence of damage to the concrete.
[0051]
(3) In the joint structure of a reinforced concrete member according to the present invention, an auxiliary reinforcing bar is arranged along the replacement reinforcing bar separately from the replacement reinforcing bar. It is attached and the other end does not extend into the fixing part, but it extends near the surface of the fixing part (in the case of concrete column members, the lower end of the joint structure), so that shear force from the outside due to earthquake etc. When the force is applied, the deformation due to the force concentrates on the lower end of the reinforced concrete member and at the lower part of the replaceable joint structure, so that it is possible to prevent the main body side of the reinforced concrete member from being damaged.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an outline of a joint structure of a reinforced concrete member according to the present invention.
FIG. 2 is a diagram showing a configuration of an embodiment according to the present invention, and is a diagram illustrating a structure of an attachment and a replacement reinforcing bar used for a joint structure of a reinforced concrete member according to the present invention.
FIG. 3 is a diagram showing a structure for fixing a main bar and an attachment at the time of use, and showing a structure when a replacement reinforcing bar covered with a protective cover for the attachment is set.
FIG. 4 is an embodiment of a joint structure of a reinforced concrete member according to the present invention using an attachment and a replacement reinforcing bar, and is a cross-sectional view of a joint structure of a reinforced concrete member in which a pillar stands on a foundation.
5 shows a cross-sectional view of FIG. 4, FIG. 5 (a) shows an AA cross section, and FIG. 5 (b) shows a BB cross section.
FIG. 6 is an enlarged view of a main part of FIG. 4;
FIG. 7 is a diagram showing a conventional example.
[Explanation of symbols]
1, 35 Reinforced concrete pillar 2 Fixing part 3 Joining structure 4 Upper main reinforcement 5 Lower main reinforcement 6, 7 Attachment 8 Replacement reinforcement 9 Head 10 Replacement reinforcement main body 11 Protective cover 12 Left and right side walls 13 Back wall 14 Top wall 15 Bottom wall 16 Opening 17 Female screw hole 18 Male screw 19 U-shaped hole 20 Guide edge 21 Joint structure of reinforced concrete member 22 Column corner part 23 Midpoint part of column side 24 Precast concrete 25, 37 Strap 26 Cover plate 27 concave groove 28 inclined surface 29 at the inner end of the cover plate 29 expanded opening groove 30 inclined surface 31 space 32 opening 33 mortar 34 fiber reinforcement 36 main reinforcement 39, 40 concrete 41 adhesion assisting reinforcement

Claims (5)

A joint structure of a reinforced concrete member for joining a reinforced concrete member to a fixing portion, wherein a replacement reinforcing bar for connecting both is detachably provided between a main reinforcing bar in the reinforced concrete member and a main reinforcing bar in the fixing portion. Joint structure of reinforced concrete members. Attachments are fixed to respective opposite ends of the main reinforcing bars in the reinforced concrete member and the main reinforcing bars in the fixing section, and both ends of the replacement reinforcing bar are detachably attached to the attachment. The joint structure for a reinforced concrete member according to claim 1, wherein: The replacement reinforcing bar is provided in a groove formed on an outer surface of the reinforced concrete member, and a cover plate is mounted on an outer surface of a portion of the reinforced concrete member to which the replacement reinforcing bar is attached, and the cover plate is a mortar. The joint structure for a reinforced concrete member according to claim 1 or 2, wherein the joint structure is fixed with concrete. In a joint structure of a reinforced concrete member that joins a reinforced concrete member to a fixing portion, an attachment and a replacement reinforcing bar that connect a main reinforcement in the reinforced concrete member and a main reinforcement in the fixing portion,
The attachment is fixed to respective opposite ends of the main reinforcing bar in the reinforced concrete member and the main reinforcing bar in the fixing portion,
The attachment and the replacement reinforcing bar, wherein both ends of the replacement bar are attached to the attachment. The attachment has a box shape in which one surface is opened and a U-shaped hole is formed at the bottom, and the replacement reinforcing bar includes a reinforcing bar main body and upper and lower heads, and the reinforcing bar main body includes the U-shaped hole. The attachment and replacement bar according to claim 4, wherein the head is inserted into the attachment, and the head is inserted into the attachment.

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