JP2002220929A - Reinforcing apparatus and reinforcing method of concrete barlike apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing apparatus of a concrete bar-like structure that can easily prevent deformation of a concrete bar-like structure and a reinforcing method. SOLUTION: The apparatus is made up of a plurality of corner pieces 31 which are engaged to the surface of a column 20 and a plurality of tightening members 32 which are arranged along the surface 22 of the column 20 to combine the corner pieces together. The tension created by these tightening members 32 is regarded to cause the corner pieces 31 to compress the column 20 against its axis line direction in the orthogonal direction in a reinforcing apparatus of a concrete rhabdo-structure, the reinforcing apparatus 30 of the concrete bar-form-structure is positioned between the tightening members 32 and the column 20 and equipped with reinforcing members 40 to refrain expansion of the column 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing device and a reinforcing method for a concrete rod-shaped structure, and can be used for reinforcing columns and beams of a reinforced concrete building.

[0002]

2. Description of the Related Art Conventionally, reinforced concrete structures have been widely used in the fields of construction and civil engineering. For example, in a building such as a building or a structure such as a bridge, many rod-shaped columns and beams are formed, and since these columns and beams are rod-shaped, they are subjected to bending force and shear force in each direction. Especially, the pillars are also receiving axial force at the same time.

[0003] In such columns and beams, if the axial force becomes excessive due to an earthquake or the like, a part of the columns in the axial direction may expand over the entire circumference and collapse. Also, if the bending force is excessive, expansion may occur on the side where compression due to bending occurs, leading to crushing, and tearing may occur on the opposite side due to tension. Further, when the shearing force becomes excessive, cracks may be generated in an oblique direction with respect to the axial direction, which may cause shear failure.

[0004] Therefore, the present applicant has previously proposed a reinforcing device and a reinforcing method for a concrete rod-shaped structure (Japanese Patent Laid-Open Publication No. HEI 2 (1994) -209686).
000-34842). According to this proposal,
A plurality of engaging members are engaged with the surface of a pillar or a beam as a concrete rod-shaped structure, and each engaging member is connected to each other by a plurality of tightening members, and is engaged by a tensile force applied to these tightening members. When the member compresses the column or beam in a direction orthogonal to the axial direction, the maximum allowable axial force and the maximum allowable bending force are improved, cracks are suppressed, and reinforcement can be reliably performed.

[0005]

However, when an axial force or bending force acting on a column or a beam is excessively large due to an earthquake or the like and the column is going to be deformed, the engaging member on the surface of the structure is engaged. Although the deformed portion is restrained by the engaging member to suppress the deformation, the remaining portion may not be sufficiently suppressed from being deformed.

An object of the present invention is to provide a reinforcing device and a reinforcing method for a concrete rod-like structure capable of easily suppressing deformation of the concrete rod-like structure.

[0007]

Means for Solving the Problems In order to achieve the above object, a reinforcing device and a reinforcing method for a concrete rod-like structure according to the present invention employ the following constitutions. The reinforcing device for a concrete rod-shaped structure according to claim 1, wherein the plurality of engaging members are engaged with a surface of the concrete rod-shaped structure, and each of the engaging members is disposed along a surface of the structure. And a plurality of tightening members for connecting the plurality of tightening members, and the engaging member is capable of compressing the structure in a direction orthogonal to an axial direction thereof by a tensile force applied to these tightening members. The reinforcing device according to the above, further comprising a reinforcing member interposed in a gap between the tightening member and the structure to suppress expansion of the structure. Here, the concrete rod-shaped structures are not limited to columns and beams, but include diagonal braces and the like.

According to the present invention, since the reinforcing member is interposed in the gap between the tightening member and the structure, when an excessive axial force or bending force is generated in the structure due to an earthquake or the like, the tightening member is used. Since the supported reinforcing member presses the surface of the structure, it is possible to suppress the structure from being deformed and the surface from expanding, and the deformation of the structure can be easily suppressed. Further, since the structure can be reinforced only by interposing the reinforcing member in the gap between the tightening member and the structure, for example,
Reinforcement can be performed easily and inexpensively as compared with the case where the number of engagement members is increased.

The reinforcing device for a concrete rod-shaped structure according to claim 2 is the reinforcing device for a concrete rod-shaped structure according to claim 1, wherein the reinforcing member is provided on a surface of the tightening member and a surface of the structure. It is characterized by being abutted. According to the present invention, since the reinforcing member is brought into contact with the surface of the tightening member and the surface of the structure, at the same time as the deformation of the structure starts, the surface of the structure is pressed by the reinforcing member, and the structure is deformed. Thus, the surface can be prevented from expanding, and the deformation of the structure can be reliably suppressed.

A reinforcing device for a concrete rod-shaped structure according to a third aspect is the reinforcing device for a concrete rod-shaped structure according to the first or second aspect, wherein the reinforcing member is provided substantially at the center between the engaging members. It is characterized by being arranged. According to the present invention, since the reinforcing member is arranged substantially at the center of each of the engaging members, a portion of the surface of the structure that is most likely to expand, that is, a substantially central portion of the engaging members can be reinforced. Therefore, the deformation of the structure can be effectively suppressed.

A reinforcing device for a concrete rod-shaped structure according to a fourth aspect is the reinforcing device for a concrete rod-shaped structure according to any one of the first to third aspects, wherein the reinforcing member is provided between the engaging members. It is characterized in that a plurality are arranged between them. According to this invention, since a plurality of reinforcing members are arranged between the engaging members, the number of reinforcing members can be adjusted and arranged according to the degree of need for reinforcement on the surface of the structure. In addition, the deformation of the structure can be effectively suppressed.

According to a fifth aspect of the present invention, there is provided a reinforcing device for a concrete rod-shaped structure according to any one of the first to fourth aspects, wherein the reinforcing device is arranged in an axial direction of the structure. It is characterized in that a plurality are arranged. According to the present invention, since a plurality of reinforcing devices are arranged in the axial direction of the structure, deformation can be suppressed over a part or the whole of the structure.

The reinforcing device for a concrete rod-shaped structure according to claim 6 is the reinforcing device for a concrete rod-shaped structure according to any one of claims 1 to 5, wherein the reinforcing member is arranged in the axial direction of the structure. It is characterized by being continuous with an adjacent reinforcing member. According to the present invention, since the reinforcing member is made continuous with the reinforcing member adjacent in the axial direction of the structure, the position of the reinforcing member is shifted in the axial direction of the structure when there is shaking or vibration due to an earthquake or the like. Therefore, the deformation of the structure can be surely suppressed.

According to a seventh aspect of the present invention, there is provided a reinforcing device for a concrete rod-shaped structure according to any one of the first to sixth aspects, wherein the reinforcing member has a taper on one surface. It is a flat plate, and the thickness of both ends is different. According to the present invention, by inserting the reinforcing member into the gap between the tightening member and the structure from the thinner part to the thicker part of the both ends, the reinforcing member completely fills the gap. Since the space is filled and completely contacted with the surface of the tightening member and the surface of the structure, the deformation of the structure can be surely suppressed.

According to an eighth aspect of the present invention, there is provided a reinforcing device for a concrete rod-shaped structure according to any one of the first to seventh aspects, wherein the reinforcing member is engaged with the tightening member. It is characterized by having a locking portion. According to the present invention, since the reinforcing member is provided with the locking portion for locking to the tightening member, the reinforcing member can be easily held in the gap between the tightening member and the structure, and the installation work of the reinforcing member can be performed. Work efficiency can be improved.

According to a ninth aspect of the present invention, there is provided a reinforcing method for reinforcing a concrete rod-shaped structure using the reinforcing device according to any one of the first to eighth aspects. A plurality of the engaging members are engaged with the surface of the structure, and the engaging members are connected by the tightening members, and a tensile force is applied to the tightening members to apply the tensile force to the structure by the engaging members. After being compressed in a direction orthogonal to the axial direction, the reinforcing member is inserted into a gap between the tightening member and the structure. According to the present invention, similarly to the first aspect, the deformation of the structure can be easily suppressed. In addition, reinforcement can be performed easily and at low cost as compared with the case where the number of engagement members is increased.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall side view of a pillar 20 as a concrete rod-shaped structure according to an embodiment of the present invention.

The pillar 20 is a concrete quadrangular pillar-shaped body provided inside the reinforced concrete building 10 and formed on the floor 11 to support the floor 12 on the upper floor side. The reinforcement member is connected to the reinforcement members in the upper and lower floors 11 and 12, the lower foundation 13, and the upper beams 14. In this embodiment, the pillars 20 are provided on the first floor as shown in the figure, but the present invention may be applied to pillars provided on two or more floors or underground. Pillar 2
In FIG. 0, a plurality of reinforcing devices 30 surrounding four circumferences in the axial direction are arranged in a plurality of stages at regular intervals with a vertical interval. The spacing between the reinforcing devices 30 is not particularly limited, and may be appropriately determined in the implementation.

FIG. 2 shows an overall plan view of the reinforcing device 30. The reinforcing device 30 includes a total of four corner pieces 31 as engagement members arranged corresponding to the respective corners 21 of the pillar 20, and each corner piece 31 horizontally arranged along the four circumferential surfaces 22 of the pillar 20. It comprises a total of four tightening members 32 connecting the two, and a reinforcing member 40 interposed substantially at the center of each corner piece 31 in the gap S between the tightening member 32 and the column 20.

FIGS. 3 and 4 show an enlarged side view and an enlarged cross-sectional view of the reinforcing device 30. FIG. The corner piece 31 is manufactured by casting with a metal material and includes two pieces 312 each having a substantially L-shaped cross section, and each piece 312 is orthogonal to the pillar 20 (two-dot chain line in the figure). It has an abutment surface 311 applied to the surface 22. In addition, the corner piece 31 may be manufactured by an arbitrary processing method such as forging or machining.

The one piece 312 of the corner piece 31 is provided with an insertion hole 313 penetrating the one piece 312, and the insertion hole 313 is larger than the insertion hole 313 at the end of the other piece 312. A seat 315 having a diameter dimension is provided. The other piece 312 is provided with a female screw 314 in a direction orthogonal to the insertion hole 313.

The tightening member 32 includes a bolt 321 inserted into the insertion hole 313 of the corner piece 31,
21 and a nut 322 screwed to the proximal end side. The bolt 321 is a so-called PC steel rod, and has a male screw 324 at its distal end and a male screw 3 at its proximal end.
25 are engraved. Further, a groove 323 is provided on the base end surface of the bolt 321, and a male screw 324 on the distal end side of the bolt 321 is rotated by locking a screwdriver or the like in this groove 323, and the female screw 314 of the corner piece 31
It can be easily screwed into the device.

The nut 322 is screwed into a male screw 325 on the base end side of the bolt 321, and is engaged with the bottom surface of the seating portion 315 of the corner piece 31. In addition, the seat hole 315 of the corner piece 31 has an insertion hole 3
A bolt cover 316 for concealing the bolt 13 is screwed so that the bolt 321 does not protrude from the insertion hole 313 even if the tip of the bolt 321 comes off the corner piece 31.

In the reinforcing device 30 as described above, the corner pieces 31 are arranged at each corner 21 of the column 20, and
After connecting the corner pieces 31 with the tightening members 32, a tensile force is applied to the bolts 321 of the tightening members 32 so that the reaction force is applied to the nuts 322 and the corner pieces 31.
And compresses the column 20 in a direction (horizontal direction) orthogonal to its axial direction (vertical direction).

FIG. 5 is a side view of the reinforcing member 40. The reinforcing member 40 is made of metal having a substantially L-shaped cross section, and has a main body 41 interposed in the gap S between the tightening member 32 and the column 20. And a locking portion 42 for locking. In addition,
The locking portion 42 is formed integrally with the main body 41, but may be formed separately, for example, may have a structure in which the main body 41 and the locking portion 42 are connected to each other by bolts. Also, the reinforcing member 40
Is not limited to metal, but may be formed of other materials such as wooden, hard rubber and the like.

The main body 41 is a flat rectangular plate and has a taper formed on the surface of the tightening member 32 so that the upper end in the height direction is thicker and the lower end is thinner. A contact surface 41 that is in contact with the surface 22 of the column 20
1, and a contact surface 412 that contacts the surface of the tightening member 32. In addition, the size of the main body 41 such as the width dimension and the length dimension may be arbitrarily determined.

The locking portion 42 is a flat plate, and the lower surface thereof is locked to the upper surface of the bolt 321 of the tightening member 32 so that the reinforcing member 40 does not drop.

Next, a method of reinforcing the column 20 using the reinforcing device 30 will be described. First, the corner pieces 31 are arranged at the respective corners 21 of the column 20, the bolts 321 of the tightening members 32 are inserted into the insertion holes 313 of the corner pieces 31, and the male screws 324 on the tip sides of the corner pieces 31 are inserted into the adjacent corner pieces 31. The corner piece 31 and the tightening member 32 are connected by screwing into the female screw 314 and screwing the nut 322 into the male screw 325 on the base end side. Next, a tension is applied to the tightening member 32 by rotating the nut 322 with a tool such as a jack.

Thereafter, the reinforcing member 40 is inserted into the gap S between the column 20 and the tightening member 32 from above the reinforcing device 30. Specifically, the main body 41 of the reinforcing member 40 is inserted into the gap between the tightening member 32 and the column 20 from the lower end, that is, the thinner portion to the upper end, that is, the thicker portion, of both ends in the height direction. Insert toward. Then, the gap S is gradually filled by the main body 41 of the reinforcing member 40. After that, when the gap S is completely filled, the contact surface 4 of the main body 41
11 is in contact with the surface 22 of the column 20, and the contact surface 412 is in contact with the surface of the tightening member 32.

Therefore, the present embodiment has the following effects. (1) Since the reinforcing member 40 is interposed in the gap S between the tightening member 32 and the column 20, the column 20 is supported by the tightening member 32 when an excessive axial force or bending force is generated in the column 20 due to an earthquake or the like. Since the reinforcing member 40 presses the surface 22 of the column 20, it is possible to prevent the column 20 from deforming and the surface 22 from expanding, and the deformation of the column 20 can be easily suppressed. Further, since the column 20 can be reinforced only by interposing the reinforcing member 40 in the gap S between the tightening member 32 and the column 20, it is easy and inexpensive as compared with, for example, increasing the number of corner pieces 31 to be installed. Can be reinforced.

(2) Since the reinforcing member 40 is brought into contact with the surface of the tightening member 32 and the surface 22 of the column 20, the deformation of the column 20 starts, and at the same time, the surface of the column 20 is pressed by the reinforcing member 40. The deformation of the column 20 due to the deformation of the surface 20 can be suppressed, and the deformation of the column 20 can be reliably suppressed.

(3) The reinforcing member 40 is connected to each corner piece 3
Since they are arranged substantially at the center of each other, the portion of the surface 22 of the pillar 20 that is most likely to expand, that is, the substantially central portion of the corner pieces 31 can be reinforced, so that the deformation of the pillar 20 is effectively suppressed. it can.

(4) Since a plurality of the reinforcing devices 30 are provided in the axial direction of the structure, deformation can be suppressed over a part or the whole of the column 20.

(5) The main body 41 of the reinforcing member 40 is inserted into the gap S between the tightening member 32 and the column 20 from the lower end, that is, the thinner portion to the upper end, that is, the thicker portion, of both ends. By doing so, the reinforcing member 40 completely fills the gap S, and the surface of the tightening member 32 and the column 20
Is completely in contact with the surface 22 of the column 20, so that the deformation of the column 20 can be reliably suppressed.

(6) Since the reinforcing member 40 is provided with the locking portion 42 for locking to the tightening member 32, the reinforcing member 40 can be easily held in the gap S between the tightening member 32 and the column 20. The work efficiency of the installation work of the reinforcing member 40 can be improved.

It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved. For example, in the present embodiment, the locking portion 42 is a flat plate material. However, the present invention is not limited to this. As shown in FIG.
It may be shaped like a letter so as to be more securely engaged.
Further, in the present embodiment, the reinforcing member 40 has a substantially L-shaped vertical cross section, but is not limited to this, and may have a triangular cross section as shown in FIG. 6 (B).

Further, in this embodiment, the engaging portion 42 is provided on the reinforcing member 40 so that the gap S between the tightening member 32 and the column 20 can be reduced.
However, the locking section 42 may not be provided, and the cross-sectional shape may be rectangular, circular, triangular, or any other shape as shown in FIGS.

In the present embodiment, the reinforcing member 40 is
In the gap S between the surface 22 of the column 20 and the tightening member 32 of the reinforcing device 30, the corner pieces 31 are arranged at substantially the center of the corner pieces 31, but the position and the number may be determined arbitrarily. May be arranged over other parts or all of the parts. Specifically, as shown in FIG. 8, a plurality of reinforcing members 40 may be arranged between the corner pieces 31. With this configuration, the number of the reinforcing members can be adjusted and arranged in accordance with the degree to which reinforcement is required on the surface 22 of the column 20, so that the deformation of the column 20 can be effectively suppressed.

As shown in FIG. 9, the reinforcing member 40 may be continuous with the reinforcing member 40 adjacent to the column 20 in the axial direction. In this manner, when there is shaking or vibration due to an earthquake or the like, the position of the reinforcing member 40 can be prevented from being shifted in the axial direction of the column 20, so that the deformation of the column 20 can be reliably suppressed. .

Further, in the present embodiment, the corner piece 31 of the reinforcing device 30 is manufactured by any method such as forging, casting, or shaving, but in addition to these, FIG. 10 (A) and FIG. Like a corner piece 61 shown, a flat plate material may be formed by bending. Each corner piece 6
1 is a plane W shape, and the aforementioned corner piece 31
Similarly to the above, it has a pair of contact surfaces 611. The corner piece 61 includes a total of eight bolts 3 arranged in upper and lower two stages.
21 and nuts 322 screwed to both ends thereof.

In the present embodiment, the reinforcing device 30 is installed on the pillar 20 having a rectangular cross section. However, the reinforcing instrument 30 may be installed on a polygonal pillar having a triangular or pentagonal cross section. Also,
In the present embodiment, a plurality of the reinforcing devices 30 are arranged in the axial direction of the column 20, but the number of the reinforcing devices 30 may be singular.

Further, in the present embodiment, the contact surface 411 and the contact surface 412 of the reinforcing member 40 are brought into contact with the surface 22 of the column 20 and the surface of the tightening member 32. However, the present invention is not limited to this.
If the reinforcing member 40 is interposed in the gap S between the tightening member 32 and the column 20, the reinforcing member 40 may be brought into contact with only the column 20 or the tightening member 32.

In the present embodiment, the reinforcing member 40 is inserted into the gap S after the tensile force is applied to the tightening member 32. However, the present invention is not limited to this. The tension force may be applied to the tightening member 32 by rotating 322.

[0044]

According to the reinforcing device and the reinforcing method for a concrete rod-shaped structure of the present invention, the following effects can be obtained. Since a reinforcing member is interposed in the gap between the tightening member and the structure, when an excessive axial force or bending force is generated in the structure due to an earthquake or the like, the reinforcing member supported by the tightening member is used for the structure. Since the surface is pressed, it is possible to suppress the structure from being deformed and the surface from expanding, and the deformation of the structure can be easily suppressed. Further, since the structure can be reinforced only by interposing the reinforcing member in the gap between the tightening member and the structure, the reinforcement can be performed easily and inexpensively, for example, as compared with the case where the number of the engaging members is increased. .

[Brief description of the drawings]

FIG. 1 is an overall side view showing a concrete rod-shaped structure according to an embodiment of the present invention.

FIG. 2 is an overall plan view of the reinforcing device according to the embodiment.

FIG. 3 is an enlarged side view of the reinforcing device according to the embodiment.

FIG. 4 is an enlarged cross-sectional view of the reinforcing device according to the embodiment.

FIG. 5 is a side view of the reinforcing member according to the embodiment.

FIG. 6 is a side view showing a reinforcing member according to a modified example of the present invention (when the shape of the reinforcing member in a side view is different).

FIG. 7 is a plan view showing a reinforcing member according to a modification of the present invention (when the reinforcing members have different planar shapes).

FIG. 8 is an enlarged side view showing a reinforcing device according to a modified example (when a plurality of reinforcing members are arranged) of the present invention.

FIG. 9 is an enlarged side view showing a reinforcing device according to a modified example of the present invention (when the reinforcing member is continuous with a reinforcing member adjacent in the axial direction of the structure).

FIG. 10 is an overall side view and an overall plan view showing a reinforcing device according to a modified example of the present invention (when the planar shape of the engaging member is different).

[Explanation of symbols]

 Reference Signs List 20 pillar as concrete rod-shaped structure 22 surface of pillar 30 reinforcing device 31, 61 corner piece as engaging member 32 tightening member 40 reinforcing member 42 locking portion S gap between tightening member and structure

Claims (9)

[Claims] 1. A vehicle comprising: a plurality of engaging members engaged with a surface of a concrete rod-shaped structure; and a plurality of tightening members arranged along the surface of the structure and connecting the engaging members. A reinforcing member for a concrete rod-shaped structure, wherein the engaging member is capable of compressing the structure in a direction orthogonal to an axial direction thereof by a tensile force applied to the tightening members; A reinforcing device for a concrete rod-shaped structure, comprising a reinforcing member interposed in a gap between the structure and a structure for suppressing expansion of the structure. 2. The concrete rod-like structure according to claim 1, wherein the reinforcing member is in contact with a surface of the tightening member and a surface of the structure. A body stiffening device. 3. The concrete rod-shaped structure according to claim 1, wherein the reinforcing member is disposed substantially at the center between the engaging members. Reinforcement equipment. 4. The reinforcing device for a concrete rod-shaped structure according to claim 1, wherein a plurality of the reinforcing members are arranged between the engaging members. Reinforcement equipment for rod-like structures. 5. The concrete rod-like structure reinforcing device according to claim 1, wherein a plurality of the reinforcing devices are arranged in an axial direction of the structure. A body stiffening device. 6. The reinforcing device for a concrete rod-shaped structure according to claim 1, wherein the reinforcing member is continuous with a reinforcing member adjacent to the structure in the axial direction. For reinforcing concrete rods. 7. The reinforcing device for a concrete rod-shaped structure according to any one of claims 1 to 6, wherein the reinforcing member is a flat plate having a tapered surface on one side, and has different thicknesses at both ends. A reinforcing device for a concrete rod-shaped structure, comprising: 8. The reinforcing device for a concrete rod-shaped structure according to claim 1, wherein the reinforcing member has a locking portion that locks with the tightening member. Reinforcement equipment for rod-like structures. 9. A reinforcing method for reinforcing a concrete rod-shaped structure using the reinforcing device according to any one of claims 1 to 8, wherein a plurality of the engaging members are engaged with a surface of the concrete rod-shaped structure. After joining and connecting the engaging members with the tightening member, compressing the structure with the engaging member in a direction orthogonal to the axial direction by applying a tensile force to the tightening members, A method for reinforcing a concrete rod-shaped structure, comprising inserting the reinforcing member into a gap between the tightening member and the structure.