JP5607892B2 - Reinforcement method for reinforced concrete column beam joints - Google Patents

Description

  The present invention relates to a reinforcing structure for a reinforced concrete column beam joint portion that reinforces a column beam joint portion for joining a reinforced concrete beam to a reinforced concrete column in a crossing manner, and a method for the same.

  In general, in a reinforced concrete structure in which reinforcing bars (steel bars) are used for columns and beams, the column beam joints where the columns and beams are cross-joined are connected to the main bars and beams of the columns arranged in the columns and beams. The main bars are connected, and further, the shear reinforcement bars are arranged in this portion, and the concrete is placed so as to embed the main bars and the reinforcement bars.

  By the way, in addition to the axial force of each column and beam member acting on this reinforced concrete column beam joint, load is repeatedly applied to the beam, so that force is applied to the upper and lower parts of the column beam joint. Added, there is a risk of cracking in the concrete and reducing the strength of the column. In particular, during an earthquake, the displacement of the beam is greater than the displacement of the column, and if a large force in the vertical direction (perpendicular to the column) is applied to the column due to the displacement of the beam, the beam of the column It is thought that cracks occur in the part that hits both the upper and lower sides (that is, the parts on both the upper and lower sides of the column beam joint of the column), and the fracture progresses to the column side so as to split the column into an X shape. . Therefore, conventionally, in order to reinforce the column beam joint, the general method of only placing concrete is to increase the shear strength of the concrete by increasing the cross section of each column beam. As the method, mixed fiber high-strength concrete in which fibers are mixed into concrete placed in a column beam joint is used (for example, refer to Patent Document 1), or the column beam joint portion is formed in a cylindrical shape on the outer peripheral surface. Various reinforcing structures and construction methods are adopted for the column beam joints by attaching a steel reinforcing jacket having a hole for inserting a beam (see, for example, Patent Document 2).

JP 2008-31699 A JP 2003-293447 A

However, the conventional reinforced concrete column beam joint and its construction method have the following problems.
(1) In the general method of only placing concrete, since the effect of the shear reinforcement cannot be expected when calculating the shear strength, a method of evaluating the shear strength using only the concrete is employed. Therefore, in order to increase the shear strength, the cross section of each column and beam must be increased. However, when the cross section of the column beam joint is enlarged, the cross section of the column also becomes large, and the volume ratio of the building has to be reduced.
(2) In the method of mixing fibers into concrete, since concrete containing fibers is partially placed in the column beam joints, a decrease in construction efficiency is inevitable.
(3) In the method of attaching the steel reinforcement jacket to the outer peripheral surface of the column beam joint, in order to attach the reinforcement jacket to the column beam joint, the column reinforcement is assembled and the reinforcement jacket is attached to the column reinforcement. After installing the beam, the main bar of the beam must cross the main bar of the column through the hole on the outer surface of the reinforcement jacket, so it takes a lot of labor and time to install the reinforcement jacket at the column beam joint. The workability is poor, and the reinforcing jacket itself has a complicated structure, and its manufacture is not easy.
(4) In the conventional method of reinforcing a column beam joint, in many cases, a crack or the like occurs in the beam by repeatedly applying a load to the beam portion, and thus the main purpose is to reinforce the beam. It does not adequately prevent the destruction of pillars such as cracks and peeling off of pillar concrete.

  The present invention solves such a conventional problem, and in this type of reinforced concrete column beam joint reinforcement structure and its construction method, the column is destroyed such as cracking or peeling of concrete generated in the column. An object of the present invention is to reinforce the column beam joint portion in a simple and reliable manner and at a low cost.

  In order to achieve the above object, the method of reinforcing a reinforced concrete column beam joint according to the present invention includes a column beam joint obtained by joining a reinforced concrete column and a reinforced concrete beam in a crossing manner via a reinforcing means. In the reinforcement method for reinforced concrete column beam joints to be reinforced, a plurality of reinforcing bands formed in a substantially frame shape that can be attached around the main bars of the column are adopted as the reinforcing means, and the main bars of the column are assembled. After installing the first reinforcement band around the main bar of the column and at the position corresponding to the lower side of the lower main bar of the beam that intersects the main bar, and arranging the lower main bar of the beam to the main bar of the column A second reinforcing band is installed around the main bar of the column and above the lower main bar of the beam that intersects the main bar, and the main bar of the column before the upper main bar of the beam is placed in the main bar of the column. Below the upper main bar of the beam that surrounds and intersects the main bar After the third reinforcement band is installed at a position corresponding to, and the upper main bar of the beam is placed on the main bar of the column, the third reinforcement band is placed around the main bar of the column and above the upper main bar of the beam crossing the main bar. 4 Reinforcement bands are installed, concrete for each part of the column and beam is placed, and the upper and lower sides of the column concrete including the upper and lower parts of the column beam joint are placed on the concrete surface or below the concrete surface. Therefore, the gist is to restrain and reinforce by each of the reinforcing bands.

  In this construction method, the reinforcing band is preferably formed of a steel or other metal plate material or a fiber reinforced synthetic resin plate material. In this case, the reinforcing band has a frame shape corresponding to the cross-sectional shape of the column, or a frame shape corresponding to the cross-sectional shape of the column, and the inner surfaces of the frame shape are connected between the inner surfaces. It is preferable to have a reinforcing shape that reinforces the frame shape.

The reinforcement construction method of beam-to-column Joint of reinforced concrete of the present invention, by way of said, a plurality of reinforcing bands of simple structure of substantially frame form shape, Beam Joint section vertical pillars (predetermined (Concrete) around the (position) is restrained and reinforced in a bowl-like shape, so that column breakage such as cracks and delamination that may occur in the column concrete is easily and reliably prevented at low cost. The mouth can be reinforced.

The perspective view which shows the reinforcement structure of the reinforced concrete column beam joint part in the 1st Embodiment of this invention Schematic front sectional view showing the structure in a simplified manner A schematic front sectional view showing a modified example of the structure in a simplified manner The perspective view which shows the reinforcement structure of the column beam joint part of the reinforced concrete structure in the 2nd Embodiment of this invention Schematic front sectional view showing the structure in a simplified manner A schematic front sectional view showing a modified example of the structure in a simplified manner Schematic front sectional view schematically showing the reinforcing structure of a reinforced concrete column beam joint in the third embodiment of the present invention The schematic perspective view which shows the reinforcement band employ | adopted as each structure of the 1st thru | or 3rd embodiment of this invention. Schematic perspective view showing a modified example of the reinforcing band Schematic perspective view showing a modified example of the reinforcing band

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment. As shown in FIG. 1, the reinforced concrete column beam joint reinforcing structure 11 includes a reinforced concrete column 1 and a column beam joint 5 in which a reinforced concrete beam 3 is joined in a cross shape. Reinforced by bands 61 and 62.

In the reinforced concrete column 1, a plurality of main bars 2 are arranged in the vertical direction in which the column 1 extends, and a number of hoop bars 20 are arranged in these main bars 2. ,..., And concrete C is cast so that the hoop bars 20 are buried. Similarly, in the reinforced concrete beam 3, a plurality of main bars 4,... Are arranged in the horizontal direction in which the beam 3 is extended, and a plurality of ribs 40 are arranged in these main bars 4,. Concrete C is cast and formed so that these main bars 4,. And in the column beam joint part 5 where these columns 1 and the beams 3 are joined, the main bars 2 of the column 1 and the main bars 4 of the beam 3 connected to the columns 1 and 3 are connected, and In this portion, shear reinforcement bars are arranged, and concrete C is placed so that the main bars 2, ..., 4, ..., reinforcement bars are embedded. In this case, the cross-sectional shape of the pillar 1 and the beam 3 is a quadrangle whose length of one side is about 500 mm or more. Column 1, main reinforcements 2,4 used in the beam 3 the intensity of rebar at 295N / mm ² or more deformed bars, concrete used for this, the strength of the mortar and 21N / mm ² or more.

Each of the plurality of reinforcing bands 61 and 62 is formed in a substantially frame shape so as to be attachable around the main bars 2 of the column 1 by using a plate material made of steel or other metal or a plate material made of fiber reinforced synthetic resin. In this case, as shown in FIG. 8, each reinforcing band 61, 62 corresponds to the cross-sectional shape (outer shape of the flat cross section) of the column 1 by a steel flat plate having a tensile strength of 400 N / mm ² or more (flat cross section). ) It is formed in a frame shape with a square cross section. When manufacturing the reinforcing bands 61 and 62, the belt-shaped steel plate may be bent into a quadrangle in accordance with the cross-sectional shape of the column 1 (outer shape of the flat cross section), and the start end and the end may be joined by welding or the like. Also, four strip-shaped steel plates may be assembled into a quadrangle by matching the cross-sectional shape of column 1 (the outer shape of the flat cross section), and each butted end may be joined by welding or the like. It is folded into a U-shape according to the cross-sectional shape of the column 1 (the outer shape of the flat cross-section), and a strip-shaped steel plate is joined between the both ends by welding or the like. The outer shape of the cross section may be bent into an L shape, and both end portions may be butted and joined by welding or the like.

  The reinforcing bands 61 and 62 are installed at predetermined positions above and below the column beam joint portion 5 of the concrete C of the column 1. In the following description, the plurality of reinforcing bands 61 and 62 are referred to as the first reinforcing band 61 and the second reinforcing band 62 depending on the installation position of the concrete C of the pillar 1. The first reinforcing band 61 is on the concrete C surface of the column 1 corresponding to the lower side of the lower main bar 41 of the beam 3 that intersects the main bar 2,... In addition, the second reinforcing band 62 is a concrete C surface of the column 1 corresponding to the upper side of the upper main bar 42 of the beam 3 that intersects the main bar 2 of the column 1 and intersects with the main bar 2 of the column 1. Each is installed above.

  The construction method of this reinforcing structure will be described with reference to FIG. This construction method is performed in the order of assembling column reinforcement, installation of the first reinforcement band, assembly of the beam reinforcement, installation of the second reinforcement band, and placement of concrete in each part of the column and beam. First, after assembling the main bars 2 of the column 1, around the main bars 2 of the column 1 and at positions corresponding to the lower main bars 41 of the beam 3 intersecting with the main bars 2,. After the first reinforcing band 61 is installed and the lower main bars 41, ... and the upper main bars 42, ... of the beam 3 are arranged on the main bars 2, ... of the column 1, and around the main bars 2, ... of the column 1. A second reinforcing band 62 is installed above the upper main bars 42 of the beam 3 intersected with the main bars 2. Then, a formwork is assembled around the main bars 2,..., 4,... Of the pillar 1 and the beam 3 by incorporating the first and second reinforcing bands 61 and 62 into this formwork. The concrete C is placed in the formwork of each part of the beam 3. This procedure is repeated sequentially from the lower layer to the upper layer of the reinforced concrete structure. In this way, the portions corresponding to the upper side and the lower side of the column beam joint 5 of the concrete C of the column 1 are restrained and reinforced by the first and second reinforcing bands 61 and 62 on the concrete C surface. .

  In this way, the concrete C portions which contact the upper and lower sides of the column beam joint portion 5 of the column 1 are restrained and reinforced in a bowl shape by the first and second reinforcing bands 61 and 62 on the concrete C surface, so that the beam 3 Even if a load is repeatedly applied to the top and bottom of the column-beam joint 5 of the column 1, cracks and peeling will occur in the concrete C near the top and bottom of the column-beam joint 5 of the column 1. It is possible to prevent or significantly reduce this, and to reliably prevent a decrease in the strength of the pillar 1. In addition, when a large force is applied to the column 1 in the vertical direction (perpendicular to the column 1) due to an earthquake or the like and the beam 3 is displaced in the vertical direction, as described above, Cracks are likely to occur in the part of the concrete C that hits the upper and lower sides of the beam 3, that is, the part of the concrete C on the upper and lower sides of the column beam joint part 5 of the column 1 starting from this part. Even when this is the case, this portion is restrained and reinforced in the shape of a bowl by the first and second reinforcing bands 61 and 62, so that this crack is difficult to propagate to the column 1 and the column 1 is split into X shapes. In this way, the destruction of the pillar 1 can be reliably prevented by suppressing the spreading of the destruction to the pillar 1 side. Thereby, the proof stress of the column beam joint part 5 of the column 1 increases.

  As described above, in this structure and construction method, the concrete C of the column 1 is formed by the first and second reinforcing bands 61 and 62 having a simple frame shape on the upper side and the lower side of the column beam joint portion 5. Since it is restrained and reinforced, the destruction of the pillar 1 such as cracks and peeling that may occur in the concrete C of the pillar 1, particularly near the top and bottom of the column beam joint 5, can be easily and reliably prevented at low cost. The column beam joint portion 5 can be reinforced.

  In the first embodiment, the first and second reinforcing bands 61 and 62 are installed around the concrete C of the column 1 on the upper side and the lower side of the column beam joint 5, as shown in FIG. 3. As described above, a part of each of the reinforcing bands 61 and 62 may be embedded in the concrete C of the column beam joint portion 5, and in this way, the same operational effects as those of the first embodiment can be obtained. it can. Moreover, in 1st Embodiment, the part corresponded to the upper side and the lower side of the column beam joint part 5 of the concrete C of the pillar 1 is made into the 1st, 2nd reinforcement band on the concrete C surface of the pillar 1. 61 and 62 are used to restrain and reinforce, but the portions corresponding to the upper side and the lower side of the column beam joint portion 5 of the concrete C of the column 1 are connected to the first and second reinforcing bands 61 and 62 of the column 1. It may be embedded in the concrete C, and may be restrained and reinforced under the concrete C surface of the pillar 1, and even in this way, the same effect as the first embodiment can be obtained. There is an advantage that it is not necessary to provide a fireproof structure separately.

  FIG. 4 shows a second embodiment. As shown in FIG. 4, the reinforced concrete column beam joint reinforcing structure 12 includes a reinforced concrete column 1 and a column beam joint 5 in which a reinforced concrete beam 3 is joined in a cross shape. Reinforced by bands 61 and 62. In this case, the components of the column 1, the beam 3, the column beam joint 5, and the reinforcing bands 61 and 62 are the same as those in the first embodiment.

  The plurality of reinforcing bands 61 and 62 are installed at predetermined positions above and below the column beam joint 5 of the concrete C of the column 1. The first reinforcing band 61 is on the concrete C surface of the column 1 corresponding to the upper side of the lower main bar 41 of the beam 3 that intersects the main bar 2 of the column 1 and around the main bar 2 of the column 1. The second reinforcing band 62 is a concrete C surface of the column 1 corresponding to the lower side of the upper main bar 42 of the beam 3 that intersects the main bar 2,... Each is installed above.

  The construction method of this reinforcing structure will be described with reference to FIG. This method consists of assembling column reinforcement, beam reinforcement (lower main reinforcement), installation of the first reinforcement band, installation of the second reinforcement band, assembly of beam reinforcement (upper reinforcement), concrete of each part of the column and beam. It is performed according to the procedure of placing. First, the main bars 2,... Of the column 1 are assembled, and the lower main bars 41,... Of the beam 3 are arranged on the main bars 2,. The first reinforcing band 61 is installed on the upper side of the lower main bar 41 of the beam 3 intersected with ..., and before the upper main bar 42 ... of the beam 3 is arranged on the main bar 2, ... of the column 1, A second reinforcing band 62 is installed around the main bars 2 of the column 1 and at a position corresponding to the lower side of the upper main bars 42 of the beam 3 intersecting with the main bars 2. Then, after the upper main bars 42 of the beam 3 are arranged on the main bars 2 of the column 1, a formwork is formed around the main bars 2, ... 4, ... of the column 1 and the beam 3 (in this formwork). The first and second reinforcing bands 61 and 62 are assembled and assembled, and concrete C is placed on the formwork of each part of the pillar 1 and the beam 3. This procedure is repeated sequentially from the lower layer to the upper layer of the reinforced concrete structure. In this way, the portions corresponding to the upper and lower portions of the concrete beam C of the column 1 are restrained and reinforced by the first and second reinforcing bands 61 and 62 on the concrete C surface of the column 1. To do.

  In this way, the concrete C portions corresponding to the upper and lower portions of the column beam joint portion 5 of the column 1 are restrained and reinforced in a bowl shape by the first and second reinforcing bands 61 and 62 on the concrete C surface. Thus, as in the first embodiment, even if a load is repeatedly applied to the beam 3 and a force is applied to the top and bottom of the column beam joint portion 5 of the column 1, the column beam joint of the column 1 It is possible to prevent cracks and peeling from occurring in the concrete C in the vicinity of the upper and lower portions of the portion 5, or to greatly reduce this, and to reliably prevent the strength of the pillar 1 from being lowered. In addition, due to an earthquake or the like, the beam 3 is displaced in the vertical direction, and a large force is applied to the column 1 in the vertical direction (perpendicular to the column 1). Even if cracks occur in the concrete C parts on both sides starting from this part, these parts are restrained and reinforced in a bowl shape by the first and second reinforcing bands 61 and 62. In addition, it is possible to prevent the pillar 1 from being broken by suppressing the spread of the breakage toward the pillar 1 side so as to split the pillar 1 into an X shape. Thereby, the proof stress of the column beam joint part 5 of the column 1 increases.

  As described above, in this structure and construction method, the concrete C of the column 1 is constrained by the first and second reinforcing bands 61 and 62 having a simple frame shape at the upper and lower portions of the column beam joint portion 5. Because it reinforces, it can easily and reliably prevent the destruction of the pillar 1 such as cracking or peeling off of the concrete C of the pillar 1, especially near the top and bottom of the column beam joint 5, and at low cost. The beam joint portion 5 can be reinforced.

  In the second embodiment, the first and second reinforcing bands of the concrete C of the column 1 corresponding to the upper and lower portions of the column beam joint portion 5 are formed on the concrete C surface of the column 1. 61 and 62 are used to restrain and reinforce, but as shown in FIG. 6, the portions corresponding to the upper and lower portions of the column beam joint portion 5 of the concrete C of the column 1 are provided as the first and second reinforcing bands. 61 and 62 may be embedded in the concrete C of the pillar 1 and may be restrained and reinforced under the concrete C surface of the pillar 1. In this way, the same effects as those of the second embodiment can be obtained. In this case, there is an advantage that it is not necessary to separately provide a fireproof structure.

  FIG. 7 shows a third embodiment. As shown in FIG. 7, the reinforced concrete column beam joint reinforcing structure 13 includes a reinforced concrete column 1 and a column beam joint 5 in which a reinforced concrete beam 3 is joined in a cross shape. Reinforced by bands 61, 62, 63, 64. In this case, the components of the column 1, the beam 3, the column beam joint portion 5, and the reinforcing bands 61, 62, 63, 64 are the same as those in the first embodiment.

  The plurality of reinforcing bands 61, 62, 63, 64 are installed at predetermined positions above and below the column beam joint 5 of the concrete C of the column 1. The first and second reinforcing bands 61 and 62 are columns 1 corresponding to both the upper and lower sides of the lower main bar 41 of the beam 3 that surrounds the main bar 2 of the column 1 and intersects the main bar 2 of the column 1. The third and fourth reinforcing bands 63, 64 are arranged around the main bars 2, ... of the column 1 and on the upper main bars 42, ... of the beam 3 intersecting with the main bars 2, ... of the column 1 on the concrete C surface. It is installed on the concrete C surface of the pillar 1 corresponding to both the upper and lower sides.

  The method of this reinforcement structure is as follows: column rebar assembly, first reinforcement band installation, beam reinforcement (lower main reinforcement) assembly, second reinforcement band installation, third reinforcement band installation, beam reinforcement (upper main reinforcement) ), Assembling the fourth reinforcing band, and placing concrete on each part of the column and beam. First, after assembling the main bars 2,... Of the column 1, around the main bars 2,... Of the column 1 and at positions corresponding to the lower main bars 41 of the beam 3 intersecting with the main bars 2. 1 reinforcing band 61 is installed, and the lower main bar 41 of the beam 3 is arranged on the main bar 2 of the column 1... Around the main bar 2 of the column 1 and intersects with the main bar 2. A second reinforcing band 62 is installed on the upper side of the lower main bars 41,. Subsequently, before the upper main bars 42 of the beam 3 are arranged on the main bars 2 of the column 1, the upper main bars of the beam 3 around the main bars 2 of the column 1 and intersecting with the main bars 2,. 42,... The third reinforcing band 63 is installed at a position corresponding to the lower side, and the upper main bars 42 of the beam 3 are arranged on the main bars 2,. A fourth reinforcing band 64 is installed around the upper main bars 42 of the beam 3 intersecting with the main bars 2,. And the formwork around the main bars 2, ..., 4, ... of the pillar 1 and the beam 3 (on this formwork) the first, second, third, and fourth reinforcing bands 61, 62, 63, 64 Are assembled and formed, and concrete C is placed on the formwork of each part of the pillar 1 and the beam 3. This procedure is repeated sequentially from the lower layer to the upper layer of the reinforced concrete structure. In this way, the first, second, third, and fourth reinforcements of the concrete C of the column 1 on the concrete C surface of the column 1 on the upper and lower sides including the upper and lower portions of the column beam joint portion 5 are performed. The band 61, 62, 63, 64 is used for restraint reinforcement.

  In this way, the concrete C portions corresponding to the upper side and the lower side including the upper and lower portions of the column beam joint portion 5 of the column 1 are formed in a bowl shape by the first to fourth reinforcing bands 61 to 64 on the concrete C surface. Even if a load is repeatedly applied to the beam 3 and a force is applied to the top and bottom of the column beam joint 5 of the column 1, the vicinity of the column beam joint 5 of the column 1 is near the top and bottom. It is possible to prevent the occurrence of cracks and peeling off of the concrete C, or to greatly reduce this, and reliably prevent the strength of the pillar 1 from being lowered. In addition, due to an earthquake or the like, the beam 3 is displaced in the vertical direction, and a large force is applied to the column 1 in the vertical direction (perpendicular to the column 1). Even if cracks occur in the concrete C parts on both sides starting from this part, this part is shaped like a bowl with the first and second reinforcing bands 61 and 62, the third and fourth reinforcing bands 63 and 64. By being restrained and reinforced, it is difficult for the crack to propagate to the column 1, and the column 1 is destroyed by suppressing the spread of the crack to the column 1 side so as to split the column 1 into an X shape. Can be reliably prevented. Thereby, the proof stress of the column beam joint part 5 of the column 1 further increases.

  As described above, in this structure and construction method, the first to fourth reinforcing bands having a simple frame shape are formed on the concrete C of the column 1 on the upper side and the lower side including the upper and lower portions of the column beam joint portion 5. 61-64 restrains and reinforces the destruction of the pillar 1 such as cracks and peeling that may occur near the top and bottom of the column beam joint portion 5 of the concrete C of the pillar 1 easily, reliably and at low cost. Therefore, the column beam joint 5 can be reinforced.

  In the third embodiment, the first reinforcing band 61 to the fourth reinforcing band 64 are installed around the concrete C of the column 1 on the upper side and the lower side including the upper and lower portions of the column beam joint portion 5. However, a part of the first and fourth reinforcing bands 61 and 64 may be embedded in the concrete C of the column beam joint portion 5, and in this way, the same action as in the third embodiment is performed. There is an effect. Further, in the third embodiment, the portions corresponding to the upper side and the lower side of the concrete C of the column 1 including the upper and lower portions of the column beam joint portion 5 are arranged on the concrete C surface of the column 1 as the first. The reinforcing band 61 to the fourth reinforcing band 64 are restrained and reinforced, but the portions corresponding to the upper side and the lower side of the concrete C of the column 1 including the upper and lower sides of the column beam joint 5 are The first reinforcing band 61 to the fourth reinforcing band 64 may be embedded in the concrete C of the column 1 and may be restrained and reinforced under the concrete C surface of the column 1. In this case, there is an advantage that it is not necessary to separately provide a fireproof structure.

  Further, in each of the first to third embodiments, the reinforcing bands 61 to 64 can be attached around the main bars 2,... Of the column 1 by a steel or other metal plate or a fiber reinforced synthetic resin plate. However, as shown in FIG. 9 or FIG. 10, these reinforcing bands 61 to 64 are provided with a frame-shaped portion 601 corresponding to the cross-sectional shape of the column, and the frame-shaped portion 601. The inner surface may be connected and the frame-shaped portion 601 may be provided with a reinforcing shape portion 602. By doing so, the binding force of the column to the concrete is increased, and the column concrete is Restraint reinforcement can be performed more reliably.

11, 12 and 13 Reinforced structure of reinforced concrete column beam joint 1 Reinforced concrete column 2 Main reinforcement 20 Hoop reinforcement 3 Reinforced concrete beam 4 Main reinforcement 40 Stirrup 41 Lower main reinforcement 42 Upper main reinforcement 5 Column beam joint 61 First 1 stiffening band 62 2nd stiffening band 63 3rd stiffening band 64 4th stiffening band C Concrete

Claims (4)

  In the reinforcement method for reinforced concrete column beam joints, which reinforces the column beam joints in which the reinforced concrete columns are joined to the reinforced concrete columns in a crossing manner through the reinforcing means,
  The reinforcing means employs a plurality of reinforcing bands formed in a substantially frame shape so as to be attachable around the main bars of the column,
  After assembling the main bar of the column, a first reinforcing band is installed around the main bar of the column and at a position corresponding to the lower side of the lower main bar of the beam intersecting with the main bar,
  After placing the lower main bar of the beam on the main bar of the column, a second reinforcing band is installed around the main bar of the column and above the lower main bar of the beam intersected with the main bar,
  Before placing the upper main bar of the beam to the main bar of the column, install a third reinforcing band around the main bar of the column and at a position corresponding to the lower side of the upper main bar of the beam intersecting the main bar,
  After placing the upper main bar of the beam on the main bar of the column, install a fourth reinforcing band around the main bar of the column and above the upper main bar of the beam intersecting the main bar,
  Placing concrete for each part of the pillar and beam,
  The upper and lower sides of the column concrete including the upper and lower portions of the column beam joint are restrained and reinforced by the reinforcing bands on the concrete surface or the concrete surface,
Reinforcement method for reinforced concrete column beam joints.   The reinforcing method for a reinforced concrete column beam joint according to claim 1, wherein the reinforcing band is formed of a steel or other metal plate or a fiber reinforced synthetic resin plate.   The reinforcing method for a reinforced concrete column beam joint according to claim 1 or 2, wherein the reinforcing band has a frame shape corresponding to a cross-sectional shape of the column.   The reinforced concrete according to claim 1 or 2, wherein the reinforcing band has a frame shape corresponding to a cross-sectional shape of the column, and has a reinforcing shape that reinforces the frame shape by connecting the inner surfaces between the inner surfaces of the frame shape. Reinforcement method for steel column beam joints.

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