Method for manufacturing reinforced concrete column, method for manufacturing structure, reinforced concrete column, and structure

Abstract

To suppress the displacement of a column reinforcement when manufacturing a reinforced concrete column.SOLUTION: In the manufacturing method of the reinforced concrete column, the frame is arranged, the column reinforcement is arranged while supporting the column reinforcement by the frame, and concrete is placed so that the frame and the column reinforcement are covered with the concrete.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a method for manufacturing a reinforced concrete column, a method for manufacturing a structure, a reinforced concrete column, and a structure. [Background technology]

[0002] A reinforced concrete column includes a column reinforcing bar and concrete covering the column reinforcing bar (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-146601 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, reinforced concrete is manufactured by placing column rebars and pouring concrete so that the column rebars are covered with concrete. However, in this manufacturing method of reinforced concrete columns, the position of the column rebars can become misaligned, for example, when pouring the concrete.

[0005] This specification discloses a technique that can solve the above-mentioned problems. [Means for solving the problem]

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) The method for manufacturing a reinforced concrete column disclosed in this specification includes placing a frame, placing a column reinforcing bar while supporting it with the frame, and pouring concrete so that the frame and the column reinforcing bar are covered with concrete. According to this method for manufacturing a reinforced concrete column, the column reinforcing bar is placed while being supported by the frame, which prevents the column reinforcing bar from shifting out of position.

[0008] (2) In the method for manufacturing a reinforced concrete column, the frame may be made of a steel material. According to this configuration, since the frame is made of a steel material, the strength of the reinforced concrete column is improved.

[0009] (3) In the method for manufacturing a reinforced concrete column, the frame may be an angle frame. According to this configuration, since the frame is an angle frame, a cavity is not formed around the frame in the reinforced concrete column, as in a frame formed of, for example, a square pipe, and the strength of the reinforced concrete column is improved.

[0010] (4) In the method for manufacturing a reinforced concrete column, the column reinforcing bars may have a plurality of main reinforcing bars extending in the vertical direction and hoops extending in the horizontal direction, which are rectangular in the vertical view and surround the plurality of main reinforcing bars, and the frame may cover the outside of each of a first side of the hoops and a second side of the hoops perpendicular to the first side in the vertical view. With this configuration, displacement of the column reinforcing bars is suppressed.

[0011] (5) In the method for manufacturing a reinforced concrete column, the frame does not need to cover the outside of each of the third side of the hoop facing the first side and the fourth side of the hoop facing the second side when viewed in the vertical direction. According to this configuration, since the frame does not cover the outside of each of the third side and the fourth side when viewed in the vertical direction, the frame can be used to manufacture reinforced concrete columns of various cross-sectional sizes.

[0012] (6) The method for manufacturing a structure disclosed in this specification is a method for manufacturing a structure having a joint between a reinforced concrete column and a steel beam, in which the reinforced concrete column is manufactured by the method for manufacturing a reinforced concrete column described in any one of (1) to (5) above, and the steel beam is placed above the concrete in the reinforced concrete column. This method for manufacturing a structure prevents misalignment of the column reinforcing bars during the manufacture of the reinforced concrete column of the structure.

[0013] (7) The reinforced concrete column disclosed in this specification includes a frame, a column reinforcing bar supported by the frame, and concrete covering the frame and the column reinforcing bar. In this reinforced concrete column, the column reinforcing bar is supported by the frame, so that misalignment of the column reinforcing bar is suppressed during the manufacture of the reinforced concrete column.

[0014] (8) In the above-described reinforced concrete column, the frame may be formed of a steel material. According to this configuration, since the frame is formed of a steel material, the strength of the reinforced concrete column is improved.

[0015] (9) In the above-described reinforced concrete column, the frame may be an angle frame. According to this configuration, since the frame is an angle frame, a cavity is not formed around the frame in the reinforced concrete column, as in a frame formed of, for example, a square pipe, and the strength of the reinforced concrete column is improved.

[0016] (10) In the above-mentioned reinforced concrete column, the column reinforcing bars may have a plurality of main reinforcing bars extending in the vertical direction and a hoop reinforcing bar extending in the horizontal direction, the hoop reinforcing bar being rectangular in the vertical view and surrounding the plurality of main reinforcing bars, and the frame may cover the outside of each of a first side of the hoop reinforcing bar and a second side of the hoop reinforcing bar perpendicular to the first side in the vertical view. With this configuration, displacement of the column reinforcing bars is suppressed during the manufacture of the reinforced concrete column.

[0017] (11) In the above-described reinforced concrete column, the frame does not need to cover the outside of each of the third side of the hoop opposite the first side and the fourth side of the hoop opposite the second side when viewed in the vertical direction. According to this configuration, since the frame does not cover the outside of each of the third side and the fourth side when viewed in the vertical direction, the frame can be used to manufacture reinforced concrete columns of various cross-sectional sizes.

[0018] (12) A structure disclosed in this specification is a structure having a joint between a reinforced concrete column and a steel beam, and includes the reinforced concrete column according to any one of (7) to (11) above, and the steel beam arranged above the concrete in the reinforced concrete column. This structure prevents misalignment of the column reinforcing bars during manufacturing of the reinforced concrete column in the structure.

[0019] The technology disclosed in this specification can be realized in various forms, for example, in the form of a method for manufacturing a reinforced concrete column, a method for manufacturing a structure, a reinforced concrete column, a structure, etc. [Brief explanation of the drawings]

[0020] [Figure 1] An explanatory diagram showing the structure of the structure [Figure 2] An explanatory diagram showing the structure of the foundation of a structure [Figure 3] An explanatory diagram showing the structure of the foundation of a structure [Figure 4] A perspective view showing column reinforcing bars and a frame in a structure. [Figure 5] Flowchart showing a method for manufacturing a structure DETAILED DESCRIPTION OF THE INVENTION

[0021] A. Implementation: (Configuration of structure 10) FIG. 1 is an explanatory diagram showing the configuration of a structure 10. FIG. 1 shows a cross section of the structure 10. FIG. 1 also shows an enlarged view of a joint 10C between a column 20 and a beam 30 in the structure 10. FIG. 1 shows mutually orthogonal X, Y, and Z axes for specifying directions. In FIG. 1, the Z-axis direction is the up-down direction (vertical direction), the X-axis direction is the horizontal direction, and the Y-axis direction is the horizontal direction and perpendicular to the X-axis direction. The positive Z-axis direction is the upward direction, and the negative Z-axis direction is the downward direction. FIG. 1 also shows the ground surface GL. In this specification, members extending in the Z-axis direction do not need to extend strictly vertically, but may have a certain inclination relative to the vertical direction. Similarly, members extending in the X-axis direction and the Y-axis direction do not need to extend strictly horizontally, but may have a certain inclination relative to the horizontal direction.

[0022] The structure 10 is, for example, a house, a building, a factory, etc. The structure 10 is a structure having a joint between a reinforced concrete column and a steel beam. The structure 10 includes a column 20, a beam 30, a base mortar 40, a joint concrete 50, and a concrete slab 60.

[0023] The pillar 20 includes pillar reinforcing bars 21 and concrete 25. In other words, the pillar 20 is a reinforced concrete pillar. The outer shape of a cross section of the pillar 20 perpendicular to the Z-axis direction is, for example, rectangular. The pillar 20 is an example of a reinforced concrete pillar.

[0024] The column reinforcing bars 21 are steel bars. The column reinforcing bars 21 have main reinforcements 22 and ties 24. The main reinforcements 22 extend in the vertical direction. The main reinforcements 22 are reinforcing bars that mainly bear tensile forces generated by bending stress. In this embodiment, the column reinforcing bars 21 include multiple (four) main reinforcements 22. Each of the multiple main reinforcements 22 is located near one of the four corners of the column 20 when viewed in the vertical direction. The ties 24 extend horizontally. The ties 24 are rectangular when viewed in the vertical direction and surround the multiple main reinforcements 22. The ties 24 prevent buckling of the main reinforcements 22 and reinforce the strength of the column 20 against shear forces. In this embodiment, the column reinforcing bars 21 include multiple ties 24. The column reinforcing bars 21 may be deformed steel bars with protrusions on their surfaces or round steel bars with a circular cross section. The column reinforcing bars 21 are supported by a frame 100 (see FIGS. 3 and 4) which will be described later.

[0025] The concrete 25 is a building material formed by, for example, hardening a mixture of gravel, sand, water, and cement. The concrete 25 extends in the Z-axis direction. The concrete 25 covers the column reinforcing bars 21. The concrete 25 covers the rack 100, which will be described later (see FIG. 3). FIG. 1 shows an upper surface 25S of the concrete 25. In other words, the upper surface 25S is the top edge of the concrete 25. The outer shape of a cross section of the concrete 25 perpendicular to the Z-axis direction is, for example, rectangular.

[0026] The beam 30 is a steel beam extending in the X-axis direction. In other words, the beam 30 is a steel beam. The beam 30 is, for example, an H-shaped steel. The beam 30 is placed above the upper surface 25S of the concrete 25 in the column 20. The end of the beam 30 in the X-axis direction overlaps with the column 20 in the vertical direction. The beam 30 is an example of a steel beam.

[0027] The base mortar 40 is a building material formed by, for example, hardening a mixture of sand, water, and cement. The base mortar 40 is part of the joint 10C between the column 20 and the beam 30. The base mortar 40 is disposed between the upper part of the column 20 and the lower part of the beam 30 in the vertical direction. More specifically, the base mortar 40 is disposed between the upper surface 25S of the concrete 25 and the lower surface 30S of the beam 30 in the vertical direction. The base mortar 40 connects the column 20 and the beam 30. In this embodiment, the base mortar 40 is circular when viewed in the vertical direction. The base mortar 40 is a cylindrical member extending in the vertical direction. The height (vertical length) of the base mortar 40 is, for example, approximately 100 mm, and the diameter (horizontal outer diameter) of the base mortar 40 is, for example, approximately 200 mm. The base mortar 40 is provided in the structure 10 mainly to improve the accuracy of the construction of the beam 30.

[0028] The joint concrete 50 is a building material formed, for example, by hardening a mixture of gravel, sand, water, and cement. The joint concrete 50 is part of the joint 10C between the column 20 and the beam 30. The joint concrete 50 is located above the concrete 25 in the column 20. The joint concrete 50 covers part of the upper side of the column reinforcing bar 21. The joint concrete 50 covers the end of the beam 30. The joint concrete 50 covers the base mortar 40. The hardness of the joint concrete 50 is, for example, equivalent to the hardness of the base mortar 40.

[0029] The concrete slab 60 is a floor material made of concrete. The concrete slab 60 supports the weight of, for example, people or objects.

[0030] 2 and 3 are explanatory diagrams showing the configuration of the foundation of structure 10. FIG. 2 shows a cross section perpendicular to the Y-axis direction of the foundation of structure 10. FIG. 3 shows the cross section of the foundation of structure 10 shown in FIG. 2, with concrete 25, concrete 85 described below, and concrete 95 described below partially omitted. Structure 10 further includes level concrete 70, a base 80, foundation beams 90, and a mounting frame 100. At least a portion of level concrete 70, base 80, foundation beams 90, and mounting frame 100 are portions of structure 10 that are located below the ground surface GL (see FIG. 1).

[0031] The level concrete 70 is a building material formed by, for example, hardening a mixture of gravel, sand, water, and cement. The level concrete 70 is provided in the structure 10 to adjust the height of a structural member disposed above the level concrete 70, for example.

[0032] The base portion 80 is placed above the level concrete 70. The base portion 80 supports the load of the structure 10. The outer shape of a cross section of the base portion 80 perpendicular to the X-axis direction is, for example, rectangular. The base portion 80 includes a base reinforcing bar 81 and concrete 85.

[0033] The base reinforcing bar 81 is a steel bar. The base reinforcing bar 81 has main reinforcements 82 and ribs 84. The main reinforcements 82 extend in the X-axis direction. In this embodiment, the base reinforcing bar 81 includes a plurality of (four) main reinforcements 82. Each of the plurality of main reinforcements 82 is located near one of the four corners of the base portion 80 when viewed in the X-axis direction. The ribs 84 have a portion extending in the Z-axis direction and a portion extending in the Y-axis direction. The ribs 84 are rectangular when viewed in the X-axis direction, and surround the plurality of main reinforcements 82. In this embodiment, the base reinforcing bar 81 includes a plurality of ribs 84. The base reinforcing bar 81 may be a deformed steel bar with protrusions on its surface, or may be round steel with a circular cross section.

[0034] The concrete 85 is a building material formed by, for example, hardening a mixture of gravel, sand, water, and cement. The concrete 85 extends in the X-axis direction. The concrete 85 covers the base reinforcing bars 81. The outer shape of a cross section of the concrete 85 perpendicular to the X-axis direction is, for example, rectangular.

[0035] The foundation beam 90 is placed above the level concrete 70. The foundation beam 90 extends in the Y-axis direction and supports the load of the structure 10. The outline of a cross section of the foundation beam 90 perpendicular to the Y-axis direction is, for example, rectangular. The foundation beam 90 includes beam reinforcing bars 91 and concrete 95.

[0036] The beam reinforcing bars 91 are steel bars. The beam reinforcing bars 91 have main reinforcements 92 and ribs 94. The main reinforcements 92 extend in the Y-axis direction. In this embodiment, the beam reinforcing bars 91 include a plurality of (four) main reinforcements 92. Each of the plurality of main reinforcements 92 is located near one of the four corners of the foundation beam 90 when viewed in the Y-axis direction. The ribs 94 have a portion extending in the Z-axis direction and a portion extending in the X-axis direction. The ribs 94 are rectangular when viewed in the Y-axis direction, and surround the plurality of main reinforcements 92. In this embodiment, the beam reinforcing bars 91 include a plurality of ribs 94. The beam reinforcing bars 91 may be deformed steel bars with protrusions on their surfaces, or may be round steel bars with a circular cross section.

[0037] The concrete 95 is a building material formed by, for example, hardening a mixture of gravel, sand, water, and cement. The concrete 95 extends in the Y-axis direction. The concrete 95 covers the beam reinforcing bars 91. The outer shape of a cross section of the concrete 95 perpendicular to the Y-axis direction is, for example, rectangular.

[0038] 4 is a perspective view showing the column reinforcing bars 21 and the mounting base 100 in the structure 10. In order to explain the configuration of the mounting base 100, parts of the structure 10 other than the column reinforcing bars 21 and the mounting base 100 are not shown in FIG. 4. The mounting base 100 is a mounting base that supports the column reinforcing bars 21.

[0039] The frame 100 has two vertical members 110, two diagonal members 120, and a horizontal member 130. The vertical members 110 are members that extend in the vertical direction (up-down direction). The two vertical members 110 are arranged parallel to each other in the horizontal direction. The diagonal members 120 are members that extend diagonally relative to the up-down and horizontal directions. The upper ends of the two diagonal members 120 are connected to different vertical members 110. The horizontal member 130 is a member that extends horizontally. Both horizontal ends of the horizontal member 130 are connected to different vertical members 110. The lower ends of the two vertical members 110 and the lower ends of the two diagonal members 120 are fixed to the level concrete 70. This fixes the position of the frame 100. Each member of the frame 100 is formed from steel. More specifically, the frame 100 is an angle frame in which each member is formed from an angle steel material.

[0040] The mount 100 is bound to the column reinforcing bar 21 by, for example, a rope, a string, or the like, to support the column reinforcing bar 21. By supporting the column reinforcing bar 21, the mount 100 prevents the column reinforcing bar 21 from shifting position.

[0041] In this embodiment, the frame 100 covers the outside of each of the first side S1 of the hoop 24 and the second side S2 of the hoop 24 that is perpendicular to the first side S1, as viewed in the vertical direction. More specifically, in this embodiment, the structure 10 includes two frames 100. The first frame 100 (hereinafter referred to as the "first frame 101") is located on the negative Y-axis side of the column reinforcing bars 21. In the vertical direction, the first frame 101 covers the first side S1, which is located on the negative Y-axis side of the two sides of the hoop 24 that extend in the X-axis direction. The first frame 101 is positioned so that the horizontal member 130 of the first frame 101 is parallel to the first side S1. The second frame 100 (hereinafter referred to as the "second frame 102") is located on the positive X-axis side of the column reinforcing bars 21. When viewed from the top-bottom direction, the second frame 102 covers the second side S2 located on the positive side of the X-axis of the two sides extending in the Y-axis direction of the hoop 24. The second frame 102 is positioned so that the horizontal member 130 of the second frame 102 is parallel to the second side S2.

[0042] In this embodiment, when viewed in the vertical direction, the cradle 100 does not cover the outside of the third side S3 of the hoop 24, which faces the first side S1, and the fourth side S4 of the hoop 24, which faces the second side S2. More specifically, the cradle 100 is not arranged on the positive Y-axis side of the column reinforcing bars 21. When viewed in the vertical direction, the cradle 100 does not cover the outside of the third side S3, which is located on the positive Y-axis side of the two sides of the hoop 24 extending in the X-axis direction. The cradle 100 is not arranged on the negative X-axis side of the column reinforcing bars 21. When viewed in the vertical direction, the cradle 100 does not cover the outside of the fourth side S4, which is located on the negative X-axis side of the two sides of the hoop 24 extending in the Y-axis direction.

[0043] (Method for manufacturing structure 10) 5 is a flowchart showing a method for manufacturing the structure 10. The structure 10 of this embodiment can be manufactured by the following manufacturing method.

[0044] First, the level concrete 70 is produced (S110). Workers set up, for example, aluminum or wooden formwork on the ground. The workers then pour concrete prepared by mixing, for example, gravel, sand, water, and cement into the formwork. The workers then perform finishing touches such as top-retaining the concrete, and then harden the concrete. Thereafter, the workers dismantle the formwork, thereby producing the level concrete 70.

[0045] Next, the mounting base 100 is placed (S120). The worker marks out the level concrete 70. When marking out the level concrete 70, the worker takes care to accurately mark out the positions of the four corners of the column 20. The worker places the mounting base 100 on the level concrete 70 and fixes the mounting base 100 to the level concrete 70.

[0046] Next, the column reinforcing bars 21, the base reinforcing bars 81, and the beam reinforcing bars 91 are placed (S130). The worker places the various reinforcing bars in the following order, for example: the lower reinforcing bars of the base reinforcing bars 81, the column reinforcing bars 21, the beam reinforcing bars 91, and the upper reinforcing bars of the base reinforcing bars 81. When placing the column reinforcing bars 21, the worker places the column reinforcing bars 21 while supporting them with the frame 100. The worker supports the column reinforcing bars 21 by tying the frame 100 and the column reinforcing bars 21 together with, for example, a rope, a string, or the like.

[0047] Next, concrete 25, 85, 95 is produced (S140). A worker places a formwork, for example, made of aluminum or wood, on top of the level concrete 70. The worker pours concrete prepared by mixing, for example, gravel, sand, water, and cement, into the formwork. The worker performs finishing work, for example, by securing the top edge of the concrete, and then hardens the concrete. Thereafter, the worker dismantles the formwork to produce concrete 25, 85, 95. The worker may pour concrete 25, 85, 95 in multiple steps. More specifically, the worker may perform each of the steps of installing the formwork, pouring concrete, and dismantling the formwork multiple times. In this way, the worker may, for example, produce the lower part of concrete 85 and the lower part of concrete 95 in the first concrete pour, and the upper part of concrete 85, the upper part of concrete 95, and concrete 25 in the second concrete pour. When manufacturing the column 20, the worker pours the concrete 25 so that the frame 100 and the column reinforcing bars 21 are covered with the concrete 25. In this way, the column 20, the base portion 80, and the foundation beam 90 are manufactured.

[0048] Next, the base mortar 40 is produced (S150). The worker places the base mortar 40, which is prepared by mixing, for example, sand, water, and cement, on the upper surface 25S of the concrete 25 in the pillar 20. The worker places the base mortar 40 near the center of the concrete 25 when viewed from above and below. After placing the base mortar 40 on the upper surface 25S of the concrete 25, the worker hardens the base mortar 40, thereby developing the strength of the base mortar 40, and thus the base mortar 40 is produced.

[0049] Next, the beam 30 is placed on the upper surface 40S of the base mortar 40 (S160). The worker places the end of the beam 30 on the upper surface 40S of the base mortar 40.

[0050] Next, the joint concrete 50 is produced (S170). The worker sets up a formwork, for example made of aluminum or wood, above the concrete 25. The worker pours concrete prepared by mixing, for example, gravel, sand, water, and cement, into the formwork. The worker performs finishing work, for example, by securing the top edge of the concrete, and then hardens the concrete. Thereafter, the worker dismantles the formwork, thereby producing the joint concrete 50.

[0051] Next, the concrete slab 60 is manufactured (S180). Workers lay a deck plate (not shown) above the beams 30. Workers then pour concrete, prepared by mixing, for example, gravel, sand, water, and cement, onto the deck plate. After performing finishing touches such as securing the top edge of the concrete, the workers allow the concrete to harden, thereby manufacturing the concrete slab 60.

[0052] (Effects of this embodiment) As described above, in the manufacturing method for the column 20 of this embodiment, the frame 100 is placed, the column reinforcing bars 21 are placed while being supported by the frame 100, and the concrete 25 is poured so that the frame 100 and the column reinforcing bars 21 are covered with the concrete 25. According to the manufacturing method for the column 20 of this embodiment, the column reinforcing bars 21 are placed while being supported by the frame 100, and therefore, displacement of the column reinforcing bars 21 is suppressed.

[0053] In the manufacturing method of the pillar 20 of this embodiment, the cradle 100 is made of steel. According to the manufacturing method of the pillar 20 of this embodiment, the cradle 100 is made of steel, and therefore the strength of the pillar 20 is improved.

[0054] In the manufacturing method of the pillar 20 of this embodiment, the mount 100 is an angle mount. According to the manufacturing method of the pillar 20 of this embodiment, since the mount 100 is an angle mount, no cavities are formed around the mount in the pillar 20, as in mounts made of, for example, square pipes, etc., and the strength of the pillar 20 is improved.

[0055] In the manufacturing method of the column 20 of this embodiment, the column reinforcing bars 21 have a plurality of main reinforcements 22 extending in the vertical direction and hoops 24 extending in the horizontal direction, which are rectangular in the vertical view and surround the plurality of main reinforcements 22, and the frame 100 covers the outside of each of the first side S1 of the hoops 24 and the second side S2 of the hoops 24 that is perpendicular to the first side S1. According to the manufacturing method of the column 20 of this embodiment, displacement of the column reinforcing bars 21 is suppressed.

[0056] In the manufacturing method for the column 20 of this embodiment, the cradle 100 does not cover the outside of the third side S3 opposite the first side S1 of the hoop 24, nor the outside of the fourth side S4 opposite the second side S2 of the hoop 24, when viewed in the vertical direction. For example, in a cradle that covers the first side S1, the second side S2, the third side S3, and the fourth side S4, it is necessary to change the size of the cradle depending on the size of the cross section of the column 20, but in the cradle 100, it is not necessary to change the size of the cradle 100 depending on the size of the cross section of the column 20. In other words, according to the manufacturing method for the column 20 of this embodiment, the cradle 100 does not cover the outside of the third side S3 or the fourth side S4 when viewed in the vertical direction, so the cradle 100 can be used to manufacture columns 20 of various cross-sectional sizes.

[0057] The manufacturing method for the structure 10 of this embodiment is a manufacturing method for the structure 10 having a joint 10C between a column 20 and a beam 30, in which the column 20 is manufactured and the beam 30 is placed above the concrete 25 in the column 20. According to the manufacturing method for the structure 10 of this embodiment, displacement of the position of the column reinforcing bars 21 is suppressed during the manufacturing of the column 20 of the structure 10.

[0058] The pillar 20 of this embodiment includes a frame 100, a column reinforcing bar 21 supported by the frame 100, and concrete 25 covering the frame 100 and the column reinforcing bar 21. According to the pillar 20 of this embodiment, the column reinforcing bar 21 is supported by the frame 100, and therefore, displacement of the position of the column reinforcing bar 21 during manufacturing of the pillar 20 is suppressed.

[0059] In the pillar 20 of this embodiment, the mount 100 is made of steel. According to the pillar 20 of this embodiment, the strength of the pillar 20 is improved because the mount 100 is made of steel.

[0060] In the pillar 20 of this embodiment, the mount 100 is an angle mount. According to the pillar 20 of this embodiment, since the mount 100 is an angle mount, no cavities are formed around the mount in the pillar 20, as in mounts formed of, for example, square pipes, etc., and the strength of the pillar 20 is improved.

[0061] In the column 20 of this embodiment, the column reinforcing bars 21 have a plurality of main reinforcements 22 extending in the vertical direction and hoops 24 extending in the horizontal direction, which are rectangular in the vertical view and surround the plurality of main reinforcements 22, and the frame 100 covers the outside of each of the first side S1 of the hoops 24 and the second side S2 of the hoops 24 that is perpendicular to the first side S1. According to the column 20 of this embodiment, displacement of the column reinforcing bars 21 during manufacturing of the column 20 is suppressed.

[0062] In the column 20 of this embodiment, the frame 100 does not cover the outside of the third side S3 opposite the first side S1 of the hoop 24, nor the outside of the fourth side S4 opposite the second side S2 of the hoop 24, when viewed in the vertical direction. In manufacturing the column 20, for example, in a frame covering the first side S1, the second side S2, the third side S3, and the fourth side S4, it is necessary to change the size of the frame depending on the cross-sectional size of the column 20. However, in the case of the frame 100, it is not necessary to change the size of the frame 100 depending on the cross-sectional size of the column 20. In other words, according to the column 20 of this embodiment, the frame 100 does not cover the outside of the third side S3 or the fourth side S4 when viewed in the vertical direction, so the frame 100 can be used to manufacture columns 20 of various cross-sectional sizes.

[0063] The structure 10 of this embodiment is a structure 10 having a joint 10C between a column 20 and a beam 30, and includes the column 20 and the beam 30 arranged above concrete 25 in the column 20. According to the structure 10 of this embodiment, displacement of the column reinforcing bars 21 is suppressed during the manufacture of the column 20 of the structure 10.

[0064] B. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified into various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0065] The structure 10 of the above embodiment is merely an example and can be modified in various ways. Also, the method for manufacturing the structure 10 of the above embodiment is merely an example and can be modified in various ways.

[0066] In the above embodiment, the column reinforcing bars 21 include four main reinforcements 22, but the number of main reinforcements is not particularly limited. Similarly, the base reinforcing bars 81 include four main reinforcements 82, but the number of main reinforcements is not particularly limited. Similarly, the beam reinforcing bars 91 include four main reinforcements 92, but the number of main reinforcements is not particularly limited.

[0067] In the above embodiment, the gantry 100 is made of steel, but this is not necessarily limited to this, and the gantry may be made of other materials.

[0068] In the above embodiment, the mount 100 is an angle mount, but is not necessarily limited to this, and the mount may be formed of a material other than an angle.

[0069] In the above embodiment, when viewed from the top to bottom, the mount 100 does not cover the outside of each of the third side S3 and the fourth side S4, but this is not necessarily limited to this, and the mount may cover the outside of each of the third side and the fourth side.

[0070] The structure 10 in the above embodiment is a structure having a joint 10C between a column 20 and a beam 30, but any structure may be used as long as it has a reinforced concrete column, and may also have beams other than steel beams. [Explanation of symbols]

[0071] 10: Structure 10C: Joint 20: Column 21: Column rebar 22: Main reinforcement 24: Hoops 25: Concrete 25S: Top surface 30: Beam 30S: Bottom surface 40: Base mortar 40S: Top surface 50: Joint concrete 60: Concrete slab 70: Level concrete 80: Base 81: Base rebar 82: Main reinforcement 84: Ribs 85: Concrete 90: Foundation beam 91: Beam rebar 92: Main reinforcement 94: Ribs 95: Concrete 100: Frame 110: Vertical member 120: Diagonal member 130: Horizontal member S1: First edge S2: Second edge S3: Third edge S4: Fourth edge GL: Ground surface

Claims

1. A method for manufacturing a reinforced concrete column, comprising: Place the stand, The column reinforcing bar is placed while the column reinforcing bar is supported by the frame, A method for manufacturing a reinforced concrete column, wherein the concrete is poured so that the frame and the column reinforcing bars are covered with concrete.

2. A method for manufacturing a reinforced concrete column according to claim 1, A method for manufacturing a reinforced concrete column, wherein the frame is formed from steel.

3. A method for manufacturing a reinforced concrete column according to claim 1, The method for manufacturing a reinforced concrete column, wherein the frame is an angle frame.

4. A method for manufacturing a reinforced concrete column according to claim 1, The column reinforcing bars are A plurality of main reinforcements extending in the vertical direction; A tie extending horizontally, rectangular in shape when viewed in the vertical direction, and surrounding the plurality of main reinforcements; A method for manufacturing a reinforced concrete column, wherein, when viewed from above and below, the frame covers the outside of each of a first side of the tie bars and a second side of the tie bars that is perpendicular to the first side.

5. The method for manufacturing a reinforced concrete column according to claim 4, A method for manufacturing a reinforced concrete column, wherein, when viewed from the top to bottom, the frame does not cover the outside of each of the third side of the tie bar opposite the first side and the fourth side of the tie bar opposite the second side.

6. A method for manufacturing a structure having a joint between a reinforced concrete column and a steel beam, The reinforced concrete column is manufactured by the method for manufacturing a reinforced concrete column according to any one of claims 1 to 5, A method for manufacturing a structure, comprising placing the steel beam above the concrete in the reinforced concrete column.

7. A reinforced concrete column, A stand and A column reinforcing bar supported by the frame; Concrete covering the frame and the column reinforcing bars; Reinforced concrete columns.

8. 8. The reinforced concrete column according to claim 7, The frame is a reinforced concrete pillar made of steel.

9. 8. The reinforced concrete column according to claim 7, The frame is an angle frame, a reinforced concrete pillar.

10. 8. The reinforced concrete column according to claim 7, The column reinforcing bars are A plurality of main reinforcements extending in the vertical direction; A tie extending horizontally, rectangular in shape when viewed in the vertical direction, and surrounding the plurality of main reinforcements; When viewed from above and below, the frame covers the outside of each of a first side of the tie bars and a second side of the tie bars that is perpendicular to the first side of the tie bars.

11. 11. A reinforced concrete column according to claim 10, A reinforced concrete column in which, when viewed from above and below, the frame does not cover the outside of each of a third side of the tie bar opposite the first side and a fourth side of the tie bar opposite the second side.

12. A structure having a joint between a reinforced concrete column and a steel beam, A reinforced concrete column according to any one of claims 7 to 11; The steel beam is arranged above the concrete in the reinforced concrete column; A structure comprising:

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