Columnar structure

Abstract

To provide a columnar structure capable of securing required strength while suppressing a region occupied by a reinforcement member and a filler required for reinforcement.SOLUTION: A columnar structure according to the present invention is provided with a column body connected to a lower structure, a reinforcement member disposed along the surface of the column body, and a filler that forms the surface of the column body and covers the reinforcement member, and the reinforcement member includes a plurality of main reinforcements extending in a first direction, and a distributing bar extending in a direction intersecting the first direction and connecting the side surfaces of the plurality of main reinforcements to each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a columnar structure using lattice reinforcement bars. [Background technology]

[0002] Traditionally, columns made of reinforced concrete have been used in civil engineering structures or architectural structures such as bridge piers. These columns are subjected to axial force acting in the direction of the column's central axis, shear force acting perpendicular to the column's central axis, and bending moment. Concrete has relatively high strength against compressive stress, but relatively low strength against tensile stress. Therefore, reinforcing bars are embedded inside the concrete, and the columns are constructed so that they can exhibit sufficient strength against both compressive stress and tensile stress.

[0003] For example, according to the bridge pier reinforcement method disclosed in Patent Document 1, columnar reinforcing bars are placed at predetermined positions extending up and down from the surface of the bridge pier, and horizontally extending hoop reinforcing bars are placed on the outside of them as reinforcing materials, and a hardening material such as concrete is filled around them to reinforce the existing columns. By placing the reinforcing material and hardening agent around the perimeter and on part of the footing, the structure can be easily reinforced.

[0004] In addition, conventionally, when constructing, repairing, or reinforcing a structure, a technique has been used in which flat reinforcing bar members having a lattice shape processed in a factory are transported to the site and installed in a designated position on the structure at the site.

[0005] In the construction of such conventional reinforcing bar members, lattice-shaped reinforcing bar members are arranged at a predetermined distance along the surface of a structure such as a beam, floor, or column of a structure, and a filling material such as mortar is filled from above. The filling material fills the space between the reinforcing bar member and the structure, and further covers the reinforcing bar member so that the thickness of the filling material from the reinforcing bar member is a predetermined dimension. This structure eliminates the need for a process in which reinforcing bars such as steel bars are assembled by a skilled worker on-site or a process in which reinforcing bars are welded in a factory, reducing the effort and cost of assembling reinforcing bars and eliminating the need to secure skilled workers. In addition, the lattice-shaped reinforcing bar members improve the load-bearing performance of reinforced concrete structures.

[0006] For example, the reinforced concrete structure disclosed in Patent Document 2 is reinforced by a reinforcing bar member formed into a plate shape having a lattice with a plurality of main bars arranged parallel to one another and a plurality of distribution bars connecting adjacent main bars. The reinforced concrete structure of Patent Document 2 uses a plate-shaped reinforcing bar member having a lattice, and as a result, the dimension in the thickness direction is reduced and the load-bearing performance is improved compared to a conventional reinforcing bar structure made of deformed steel bars. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2014-205989 A [Patent Document 2] JP 2018-91126 A Summary of the Invention [Problem to be solved by the invention]

[0008] According to the reinforced concrete structure disclosed in Patent Document 1, columnar reinforcing bars and tie bars extending in the direction of the central axis of the column are overlapped and arranged as reinforcing materials. The reinforcing materials need to cover the hardening material such as concrete to a certain thickness. Therefore, in a cross section perpendicular to the central axis of the column, the area occupied by the reinforcing materials becomes large, and the columnar structure has a problem that the area occupied by the reinforcing materials for reinforcing and the hardening material required to cover them becomes large.

[0009] In addition, the reinforced concrete structure disclosed in Patent Document 2 reinforces the deck with a lattice-shaped reinforcing bar member and a filling member such as concrete that covers the reinforcing bar member. Therefore, the deck can ensure its strength without increasing the thickness dimension of the reinforcing bar member. However, since the load acting on the deck and the columnar structure is different, there was a problem that when the reinforcing bar member disclosed in Patent Document 2 was arranged along the surface of the columnar structure, it could not be adequately reinforced and the necessary strength could not be ensured.

[0010] The present invention has been made to solve the above problems, and aims to provide a columnar structure that can ensure the necessary strength while minimizing the area occupied by steel reinforcement members and filler material required for reinforcement. [Means for solving the problem]

[0011] The columnar structure of the present invention includes a column connected to a substructure, a reinforcing bar member arranged along the surface of the column, and a filling member that forms the surface of the column and covers the reinforcing bar member. An anchor lattice fixed to the substructure or superstructure; The reinforcing bar member includes a plurality of reinforcing bars extending in a first direction. No. 1 The main reinforcement extends in a direction intersecting the first direction, and the plurality of No. 1 Connecting the main bars side by side No. 1 Equipped with distribution bars and The reinforcing bar member is formed by processing a steel plate, the first main reinforcement and the first distribution reinforcement are arranged on the same plane, the anchor lattice reinforcement includes a plurality of second main reinforcement members extending in the first direction and a second distribution reinforcement member extending in a direction intersecting the first direction and connecting side surfaces of the plurality of second main reinforcement members, the anchor lattice reinforcement is formed by processing a steel plate, the second main reinforcement members and the second distribution reinforcement members are arranged on the same plane, and the reinforcing bar member is arranged to overlap the second main reinforcement members and the second distribution reinforcement members of the anchor lattice reinforcement members in a direction perpendicular to the surface of the column. . Effect of the Invention

[0012] According to the columnar structure of the present invention, the thickness of the reinforcing bar members arranged along the surface of the column is reduced, and compared to conventional reinforcing bar structures in which steel bars are combined by crossing them, the area occupied by the reinforcing bar members and filler material required for reinforcement can be reduced while ensuring the necessary strength. [Brief description of the drawings]

[0013] [Figure 1] 1 is a side view of a columnar structure 100 according to the first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram showing an example of a cross-sectional structure of the columnar structure 100 in FIG. [Diagram 3] FIG. 2 is an explanatory diagram showing an example of a cross-sectional structure of the columnar structure 100 in FIG. [Figure 4] 1 is a plan view of a reinforcing bar member 20A according to the first embodiment. [Diagram 5] FIG. 2 is a plan view of a reinforcing bar member 20B according to the first embodiment. [Figure 6] 3 is a perspective view illustrating the structure of a joint 25 of the reinforcing bar member 20 in FIG. 2. FIG. [Figure 7] 4 is a plan view of a joint 25A which is a modified example of the joint 25 of the reinforcing bar member 20 according to the first embodiment. FIG. [Figure 8] 10 is a plan view of a joint 25B which is a modified example of the joint 25 of the reinforcing bar member 20 according to the first embodiment. FIG. [Figure 8A] 3 is a perspective view illustrating the structure of a joint portion 25C which is a modified example of the joint portion 25 of the reinforcing bar member 20 in FIG. [Figure 8B] 1 is an explanatory diagram showing an example of a cross-sectional structure of a columnar structure 100 to which a joint portion 25C is applied. FIG. [Figure 9] FIG. 2 is a side view showing an example of an arrangement of reinforcing bar members 20 in a column body 10 according to the first embodiment. [Figure 10] FIG. 2 is a side view showing an example of an arrangement of reinforcing bar members 20 in a column body 10 according to the first embodiment. [Figure 11] 1 is an explanatory diagram of a cross-sectional structure of a pillar 1010 which is a comparative example of the pillar 10 of the pillar structure 100 according to the first embodiment. FIG. [Figure 12]1 is a diagram comparing the structures of a reinforcing bar member 20 according to the first embodiment and a reinforcing bar structure 1020 according to a comparative example. [Figure 13] FIG. 2 is a perspective view of a modified example of the pillar structure 100 according to the first embodiment. [Figure 14] FIG. 2 is a perspective view of a modified example of the pillar structure 100 according to the first embodiment. [Figure 15] FIG. 11 is a perspective view of the periphery of a lower structure 50 of a pillar structure 100A according to a second embodiment. [Figure 16] FIG. 11 is a perspective view of the periphery of a lower structure 50 of a pillar structure 100B according to the second embodiment. [Figure 17] FIG. 11 is a perspective view of the periphery of a lower structure 50 of a pillar structure 100C according to the second embodiment. [Figure 18] FIG. 11 is a side view of the columnar structure 100 according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described based on the drawings. In each drawing, the parts with the same reference numerals represent the same or equivalent parts, and this is common throughout the entire specification. In addition, the forms of the components shown in the entire specification are merely examples, and the present invention is not limited to the description in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to other embodiments. Furthermore, when there is no need to particularly distinguish or specify multiple similar parts that are distinguished by subscripts, the subscripts may be omitted. In addition, the size relationship of each component in the drawings may differ from the actual one.

[0015] Embodiment 1 Fig. 1 is a side view of a columnar structure 100 according to embodiment 1. In embodiment 1, the columnar structure 100 comprises a column 10 installed between a lower structure 50 and an upper structure 51. Fig. 1 is a side view of the column 10, and shows the internal structure of the column 10 in a see-through manner for the sake of convenience. Moreover, the lower structure 50 and the upper structure 51 are shown diagrammatically.

[0016] The columnar structure 100 is at least a part of a civil engineering structure equipped with a column 10 such as a bridge pier, or an architectural structure including a column 10 such as a building. The lower structure 50 of the columnar structure 100 is, for example, a footing of a bridge pier or a foundation beam of a building, and may be installed independently or connected. The upper structure 51 corresponds to, for example, a beam of the frame of a bridge or an architectural structure.

[0017] The column 10 connects the upper structure 51 and the lower structure 50, and is subjected to forces such as vibrations that the entire structure receives. In other words, the column 10 is subjected to an axial force F in the axial direction, a shear force S in a direction perpendicular to the axial direction of the column, and a bending moment M around the connection part 11 or 12 of the column 10. The axial force F is the weight of the structure including the upper structure 51, and the weight of vehicles passing on a road installed on a bridge. The shear force S is a horizontal force applied by, for example, an earthquake or strong wind. The bending moment M is a rotational force acting on the end of the column 10 when the upper structure 51 is displaced so as to tilt due to, for example, an earthquake or strong wind.

[0018] The column body 10 according to the first embodiment is an existing column 110 reinforced with a reinforcing bar member 20 and a filling member 60 such as concrete. In the first embodiment, a columnar structure 100 formed by reinforcing the existing column 110 will be described as an example. Note that the reinforcing structure using the reinforcing bar member 20 and the filling member 60 is not limited to the case of reinforcing the existing column 110, but is also applicable to a newly constructed column body 10.

[0019] Figures 2 and 3 are explanatory diagrams showing an example of the cross-sectional structure of the columnar structure 100 in Figure 1. Figures 2 and 3 show a cross section of part AA in Figure 1. The column 10 may have a rectangular cross-sectional shape as shown in Figure 2, or a circular cross-sectional shape as shown in Figure 3. The cross-sectional shape of the column 10 is not limited to a rectangle or a circle, and may be, for example, a polygonal shape or an elliptical shape.

[0020] Inside the column body 10, there is an existing column 110, which is surrounded by reinforcing bar members 20. A plurality of reinforcing bar members 20 (two in Figs. 2 and 3) are arranged along the circumferential direction of the existing column 110. The two reinforcing bar members 20 are each provided with a joint portion 25 at an end portion in the circumferential direction. In Figs. 2 and 3, the joint portion 25 is configured as a lap joint. The end portion 20b of one reinforcing bar member 20 is bent to form a step in the planar direction. The end portion 20a of the other reinforcing bar member 20 is overlapped on the end portion 20b.

[0021] The reinforcing bar members 20 arranged around the existing column 110 are not limited to two arranged in the circumferential direction, and for example, one reinforcing bar member 20 may be bent to surround the entire circumference of the existing column 110. Also, a configuration in which more than two reinforcing bar members 20 surround the existing column 110 may be used. This can be changed as appropriate depending on the size of the existing column 110 and the required strength.

[0022] 2 and 3, the existing column 110 is a reinforced concrete column, and a reinforcement structure formed by combining reinforcing axial bars 1021 and reinforcing hoops 1022 perpendicularly is provided inside the filling member 160. The reinforcing axial bars 1021 extend in the axial direction and are made of deformed steel bars. The reinforcing hoops 1022 are deformed steel bars extending in the circumferential direction of the existing column 110. However, the existing column 110 is not limited to a reinforced concrete column, and may be, for example, a steel pipe column, a steel frame column, a steel reinforced concrete column, a prestressed concrete column, or a concrete-filled steel pipe column.

[0023] (Reinforced concrete member 20) Fig. 4 is a plan view of a reinforcing bar member 20A according to the first embodiment. Fig. 5 is a plan view of a reinforcing bar member 20B according to the first embodiment. The reinforcing bar member 20 includes main bars 21 extending in a first direction and distribution bars 22 extending in a direction intersecting the first direction, and is formed in a lattice pattern. The distribution bars 22 are arranged so as to connect the side surfaces of a plurality of main bars 21 arranged in parallel with each other, and are connected integrally with the main bars 21. In other words, the distribution bars 22 are arranged on the same plane as the main bars 21.

[0024] The main reinforcement 21 has a protrusion 21a formed on its side, and the reinforcing bar 22 has a protrusion 22a formed thereon. The protrusions 21a and 22a mesh with the filling member 60, such as concrete, when the filling member 60 is filled around the reinforcement member 20, and serve to improve the bonding strength between the reinforcement member 20 and the filling member 60. If the reinforcement member 20 is formed by processing a steel plate having irregularities on its surface, such as a checkered steel plate, the plane shown in Figs. 4 and 5 will also have irregularities, further improving the bonding strength with the filling member 60. The reinforcement member 20 is not limited to a steel material, and may be made of a high-strength material other than metal, such as carbon fiber FRP, aramid fiber FRP, or glass fiber FRP.

[0025] The reinforcing bar member 20A shown in Fig. 4 is an example of the reinforcing bar member 20, and has a lattice pattern formed in a rectangular shape with the same length vertically and horizontally. The reinforcing bar member 20A is formed by cutting a steel plate, for example, with a laser, into a lattice pattern. In the reinforcing bar member 20A, the main reinforcements 21 and the distribution reinforcements 22 are formed to have the same width in a plan view, so that the reinforcing bar member 20A has the same reinforcing effect in the vertical and horizontal directions of Fig. 4. Note that the reinforcing bar member 20A may have the main reinforcements 21 formed thicker than the distribution reinforcements 22.

[0026] The reinforcing bar member 20B shown in Fig. 5 is an example of the reinforcing bar member 20, and is formed by processing a steel plate with slits and stretching it by pulling it in a direction parallel to the surface of the steel plate. In other words, the reinforcing bar member 20 is formed by stretching a steel plate with slits formed therein in the horizontal direction in Fig. 5, i.e., in a direction perpendicular to the first direction in which the main reinforcement bars 21 extend. The distribution bars 22 extending in a direction intersecting the main reinforcement bars 21 are disposed symmetrically with respect to the central axis of the main reinforcement bars 21, and are inclined with respect to the direction perpendicular to the first direction in which the main reinforcement bars 21 extend. The inclination angle of the distribution bars 22 changes depending on the amount of tension in the stretching process.

[0027] In FIG. 5, the reinforcing bar member 20B has the main reinforcement 21 formed thicker than the distribution reinforcement 22, but the main reinforcement 21 and the distribution reinforcement 22 can be made to be approximately the same thickness by adjusting the slit processing. However, the distribution reinforcement 22 is usually connected diagonally to the main reinforcement 21, and there is a difference in strength between the first direction along the main reinforcement 21 and the direction perpendicular to the first direction. In other words, the strength of the reinforcing bar member 20B when it is subjected to a tensile load in the first direction is stronger than when it is subjected to a tensile load in the direction perpendicular to the first direction. The expansion type reinforcing bar member 20 such as the reinforcing bar member 20B can be manufactured inexpensively with less material loss because only slits are formed in the steel plate, and the amount of material that needs to be cut and removed is small compared to the reinforcing bar member 20A.

[0028] (Joint part 25) FIG. 6 is a perspective view for explaining the structure of the joint portion 25 of the reinforcing bar member 20 in FIG. 2. In FIG. 6, the reinforcing bar member 20 is shown in a schematic manner, and the projections 21a and 22a of the main reinforcement bar 21 and the distribution reinforcement bar 22 are omitted. The joint portion 25 in FIG. 6 is a lap joint, and is configured by overlapping the end portion 20b of one reinforcing bar member 20, in which the step 26 is formed, and the end portion 20a of the other reinforcing bar member 20 in the vertical direction on the side surface of the column body 10. The amount of overlap between the end portion 20a and the end portion 20b may be about one to three rows of the lattice 27. Since the joint portion 25 is configured as a lap joint, the two reinforcing bar members 20 are joined via the filling member 60, and therefore the multiple reinforcing bar members 20 can exhibit the same strength as a single reinforcing bar member 20.

[0029] FIG. 7 is a plan view of a joint 25A which is a modified example of the joint 25 of the reinforcing bar member 20 according to the first embodiment. FIG. 7 shows the joint 25A formed of an expanded reinforcing bar member 20B as an example. The reinforcing bar member 20B includes a joint member 121 in which only the main reinforcement 21 extends from the end of the reinforcing bar member 20B. In other words, the reinforcing bar member 20B includes a joint member 121 protruding from the end in a first direction. The joint member 121 is formed by removing a part of the reinforcing bar 22 at the end in the first direction in which the main reinforcement 21 of the reinforcing bar member 20B shown in FIG. 5 extends. As a result, the joint member 121 includes a branch member 125 extending in a direction intersecting the first direction.

[0030] The two reinforcing bar members 20B shown in FIG. 7 have the same joint members 121, and the joint members 121 are arranged in parallel in a direction perpendicular to the first direction in which the main reinforcing bar 21 extends. At this time, the branch members 125 extending laterally from the joint members 121 are also arranged in parallel. The joint portion 25A is configured by arranging the joint members 121 and the branch members 125 in parallel on the same plane, and arranging the branch members 125 of one reinforcing bar member 20B and the branch members 125 of the other reinforcing bar member 20B alternately in the first direction. Therefore, when the filling member 60 is filled into the joint portion 25, the load is transmitted between the joint members 121 via the filling member 60, so that the two reinforcing bar members 20B are connected together. Such a joint portion 25 is also called a flat overlap joint. In addition, a flat lap joint can be realized even in the case of a reinforcing bar member 20 formed by laser removal processing such as the reinforcing bar member 20A shown in FIG. 4, by forming a joint member 121 in the reinforcing bar member 20A by processing.

[0031] Fig. 8 is a plan view of joint portion 25B which is a modified example of joint portion 25 of reinforcing bar member 20 according to embodiment 1. Fig. 8 shows an example in which joint members 121 or 122 are provided at the ends of reinforcing bar member 20A having a substantially square lattice pattern as shown in Fig. 4 and fitted together. In reinforcing bar member 20 in Fig. 8, the horizontal direction in Fig. 8 is the first direction in which main bars 21 extend. Joint member 121 connects reinforcing bar member 20 in the first direction in which main bars 21 extend, and joint member 122 connects reinforcing bar member 20 in the direction in which reinforcing bars 22 extend.

[0032] The reinforcing bar member 20 includes a joint member 121 that protrudes from an end of the reinforcing bar member 20. The joint member 121 has a protruding portion 121a that protrudes from a side surface. The joint member 121 of one reinforcing bar member 20 and the joint member 121 of the other reinforcing bar member 20 can be fitted together with their protruding portions 121a facing each other. The reinforcing bar member 20 shown in FIG. 8 also includes a joint member 122 in the direction in which the reinforcing bar 22 extends. The joint member 122 has a structure similar to that of the joint member 121, except that the protruding direction is different. The joint member 122 can also connect the reinforcing bar member 20 in a direction perpendicular to the first direction. Therefore, as shown in FIG. 8, the reinforcing bar members 20 are arranged and connected in the first direction in which the main bars 21 extend and in the direction perpendicular to the first direction.

[0033] FIG. 8A is a perspective view for explaining the structure of a joint part 25C which is a modified example of the joint part 25 of the reinforcing bar member 20 in FIG. 2. FIG. 8B is an explanatory diagram showing an example of the cross-sectional structure of a columnar structure 100 to which the joint part 25C is applied. In FIG. 8A, the reinforcing bar member 20 is shown in a schematic manner, and the projections 21a and 22a of the main reinforcement bar 21 and the distribution reinforcement bar 22 are omitted. The joint part 25 in FIG. 8A is a lap joint, but includes a splice reinforcing bar member 420 which overlaps the respective ends 20a of the two reinforcing bar members 20. The splice reinforcing bar member 420 is arranged across the two reinforcing bar members 20, and is connected to the respective ends 20a of the two reinforcing bar members 20 via the filling member 60. In other words, the two reinforcing bar members 20 are connected via the splice reinforcing bar member 420. As shown in FIG. 8A, it is preferable that the reinforcing bar member 20 and the splice reinforcing bar member 420 overlap each other by about one to three rows of lattices 27 .

[0034] In FIG. 8A, the reinforcing bar member 20 and the splice reinforcing bar member 420 are arranged so that the main bars 21 and the distribution bars 22 overlap. However, the main bars 21 of the reinforcing bar member 20 are not arranged in the gap 425 between the two reinforcing bar members 20, and only the main bars 21 of the splice reinforcing bar member 420 are arranged. According to the lap joint of the type shown in FIG. 8A and FIG. 8B, it is possible to configure a lap joint without forming a step shape in each reinforcing bar member 20. Note that FIG. 8B shows the cross section of a rectangular column 10, but the shape of the column 10 is not limited to a rectangle. For example, if the column 10 is cylindrical, the ends 20a of adjacent reinforcing bar members 20 are arranged on the same plane (cylindrical surface if the column 10 is cylindrical). The splice reinforcing bar member 420 is arranged on a plane parallel to the plane on which the ends 20a of adjacent reinforcing bar members 20 are arranged.

[0035] Fig. 9 is a side view showing an example of the arrangement of the reinforcing bar members 20 in the column body 10 according to embodiment 1. The reinforcing bar member 20B shown in Fig. 5 among the reinforcing bar members 20 according to embodiment 1 is formed such that the main reinforcements 21 and the distribution reinforcements 22 have different thicknesses, and is structurally formed so as to have high strength when a tensile load is received in the first direction in which the main reinforcements 21 extend. Therefore, the purpose of reinforcing the column body 10 differs depending on how the first direction is oriented.

[0036] In FIG. 9, the reinforcing bar member 20 is arranged with the first direction parallel to the axial direction of the column body 10. In this case, the main reinforcement 21 of the reinforcing bar member 20 can share the load in the direction of pulling the column body 10 in the axial direction. A case where a tensile load acts on the reinforcing bar member 20 is a case where a tensile load acts on the column body 10 in a columnar structure 100 constituting a rigid frame structure, for example. In addition, when a bending moment M acts on the connection parts 11 and 12 of the column body 10, one side of the column body 10 receives a compressive load and the other side receives a tensile load. Therefore, for example, when the upper structure 51 is displaced so as to collapse, if the strength of the existing column 110 is insufficient, it is preferable to install the reinforcing bar member 20 so that the first direction of the reinforcing bar member 20 faces the axial direction of the column body 10 and the main reinforcement 21 acts as a reinforcing axial reinforcement extending in the axial direction of the column body 10 as shown in FIG. 9.

[0037] FIG. 10 is a side view showing an example of the arrangement of the reinforcing bar member 20 in the column body 10 according to the first embodiment. In FIG. 10, the reinforcing bar member 20 is arranged in the center of the column body 10 in the axial direction with the first direction facing the circumferential direction of the column body 10. In this case, the main reinforcement 21 of the reinforcing bar member 20 can reinforce the column body 10 against destruction caused by swelling in the outer circumferential direction. When an excessive axial force F is applied in the axial direction, the column body 10 is destroyed by swelling toward the outer circumferential side. Therefore, the main reinforcement 21 acts as a reinforcing hoop of the column body 10, and the column body 10 is reinforced against destruction caused by the axial force F. In addition, the reinforcing bar member 20 of the column body 10 in FIG. 10 can also resist destruction caused by a shear force S input to the column body 10.

[0038] FIG. 11 is an explanatory diagram of a cross-sectional structure of a column 1010, which is a comparative example of the column 10 of the columnar structure 100 according to the first embodiment. The column 1010 according to the comparative example is reinforced by a reinforcing bar structure 1020 formed by combining deformed steel bars as a structure for reinforcing an existing column 110. The reinforcing bar structure 1020 is formed by combining, for example, a reinforcing axial bar 1021 in which a deformed steel bar is arranged along the axial direction of the column 1010, and a reinforcing hoop bar 1022 which is a deformed steel bar extending in the circumferential direction of the column 1010. The thickness dimension H2 of the reinforcing bar structure 1020 is larger than the thickness dimension H1 (see FIG. 12) of the reinforcing bar member 20 according to the first embodiment, since it is formed by overlapping two deformed steel bars in the vertical direction of the side surface of the column 1010. Therefore, when this reinforcing bar structure 1020 is covered with a filling member 60 having a predetermined covering thickness, the thickness dimension H of the reinforcing structure is also larger by the amount of the larger thickness dimension H2 of the reinforcing bar structure 1020. Therefore, the pillar body 1010 of the comparative example is thicker than the pillar body 10 of the pillar structure 100 according to the first embodiment.

[0039] FIG. 12 is a comparison diagram of the structure of the reinforcing bar member 20 according to the first embodiment and the reinforcing bar structure 1020 according to the comparative example. FIG. 12(a) shows a cross section perpendicular to the main reinforcement 21 of the reinforcing bar member 20 according to the first embodiment, and FIG. 12(b) shows a cross section perpendicular to the reinforcing axial reinforcement 1021 of the reinforcing bar structure 1020 according to the comparative example. The reinforcing bar member 20 according to the first embodiment is in the form of a panel with a lattice pattern, and the main reinforcement 21 and the distribution reinforcement 22 are arranged on the same plane. Therefore, the reinforcing bar member 20 has a thickness dimension H1 throughout the entire column body 10. On the other hand, in the reinforcing bar structure 1020, the reinforcing axial reinforcement 1021 and the reinforcing hoop 1022 are arranged so as to overlap each other vertically, so that the thickness dimension H2 is the sum of the diameter D1 of the reinforcing axial reinforcement 1021 and the diameter D2 of the reinforcing hoop 1022. Therefore, when the cross-sectional areas of the main reinforcement bars 21 and reinforcing axial reinforcement bars 1021, as well as the distribution reinforcement bars 22 and reinforcing hoop bars 1022, are adjusted to ensure equivalent strength, the thickness dimension H1 of the reinforcement member 20 in embodiment 1 is thinner than the thickness dimension H2 of the reinforcement structure 1020 in the comparative example.

[0040] The reinforcing bar member 20 according to the first embodiment is configured to be thinner than the reinforcing bar structure 1020 according to the comparative example, and therefore the area it occupies inside the columnar body 10 can be reduced while maintaining strength. Furthermore, by reducing the thickness H1 of the reinforcing bar member 20, the size of the columnar structure 100 can be reduced, and the amount of the filling member 60 used can also be reduced. In the first embodiment, the filling member 60 is made of concrete, flowable concrete, high-strength concrete, fiber-reinforced concrete, mortar, non-shrink mortar, fiber-reinforced mortar, polymer cement mortar, or the like.

[0041] (Modification) Fig. 13 and Fig. 14 are perspective views of modified examples of the columnar structure 100 according to the first embodiment. The reinforcing bar members 20 are not limited to the structure in which they are installed around the entire circumference of the column body 10 of the columnar structure 100 shown in Fig. 2 and Fig. 3, and they are also effective when installed partially around the column body 10. In Fig. 13 and Fig. 14, a wall 80 is installed on the back surface of the column body 10. In such a case, since the reinforcing bar members 20 cannot be arranged around the entire circumference of the column body 10, in the columnar structure 100 shown in Fig. 13, the reinforcing bar members 20 are installed only on the front surface 15 of the column body 10.

[0042] The reinforcing bar member 20 of the column body 10 shown in Fig. 13 can resist the tensile stress occurring on the surface 15. In other words, when the column body 10 is bent in a direction perpendicular to the surface 15, i.e., from the front side to the back side in Fig. 13, the reinforcing bar member 20, the main reinforcement 21 serving as the axial reinforcing bar, can resist the tensile stress occurring on the surface 15. This improves the strength of the column body 10 against bending moments.

[0043] Moreover, the column 10 resists shear stress by the reinforcing bars 22 acting as reinforcing ties, and the cross-sectional area is increased by the filling material 60 such as concrete filled in the surface 15. Therefore, the column 10 has improved strength against shear force.

[0044] The column body 10 shown in Fig. 14 has reinforcing bar members 20 arranged on three surfaces other than the back side on which the wall 80 is installed. The column body 10 shown in Fig. 14 also has reinforcing bar members 20 installed on surfaces 16 and 17, which are the side surfaces facing the direction in which the wall 80 extends, improving the strength against tensile stress generated on surfaces 16 and 17 and also improving the strength against shear force.

[0045] Embodiment 2 The columnar structure 100A according to the second embodiment is obtained by adding a structure for fixing an end of a reinforcing bar member 20 to a substructure 50 to the columnar structure 100 according to the first embodiment. In the second embodiment, the changes from the first embodiment will be mainly described.

[0046] Fig. 15 is a perspective view of the periphery of the substructure 50 of the columnar structure 100A according to the second embodiment. The columnar body 10 in Fig. 15 has reinforcing bar members 20 arranged on at least a part of the surface. The columnar structure 100 includes anchor bars 40 extending parallel to the reinforcing bar members 20. The anchor bars 40 have their ends 40a fixed to the substructure 50 below where the reinforcing bar members 20 are installed, overlap with the reinforcing bar members 20 in the planar direction, and are connected to the reinforcing bar members 20 via the filling members 60 by filling the anchor bars 40 with the filling members 60. The anchor bars 40 and the reinforcing bar members 20 may be connected by adhesive, welding, or the like.

[0047] The anchor bars 40 have their ends 40a inserted into the fixing holes 53 drilled in the substructure 50, and are fixed by filling the fixing holes 53 with fixing filler members 61. The fixing filler members 61 are fixed by, for example, epoxy resin, mortar, or non-shrink mortar.

[0048] The anchor bar 40 can be composed of, for example, a deformed steel bar, a bolt, a screw, or a processed rebar. The anchor bar 40 has one end 40a fixed to the substructure 50 and the other end 40b fixed to the column 10, thereby resisting the stress caused by the bending moment applied to the connection part 11 of the column 10 and improving the strength of the column 10.

[0049] In Fig. 15, the anchor bars 40 are fixed to the fixing holes 53 provided in the substructure 50 located below along the surface 115 of the existing column 110. The anchor bars 40 are installed on only one surface of the existing column 110, but they may be installed around the entire periphery of the side surface.

[0050] Fig. 16 is a perspective view of the periphery of the substructure 50 of the columnar structure 100B according to the second embodiment. The columnar structure 100B shown in Fig. 16 is obtained by changing the form of the anchor reinforcements 40 from the columnar structure 100A of Fig. 15. The columnar structure 100B is provided with anchor lattice reinforcements 40A which are formed in a lattice shape and inserted into fixing holes 53. The anchor lattice reinforcements 40A are formed in a lattice shape by main reinforcements 43 extending along the axial direction of the column 10 and reinforcing bars 42 extending along the circumferential direction of the column 10, similar to the reinforcing bar member 20.

[0051] The anchor lattice 40A is fixed to the substructure 50 by inserting the ends 41 of the main reinforcements 43 into the fixing holes 53. The lattice portion 45 formed in a lattice shape by the main reinforcements 43 and the distribution reinforcements 42 is overlapped in the planar direction with the reinforcing bar member 20, and is connected to the reinforcing bar member 20 via the filling member 60. Since the anchor lattice 40A includes the lattice portion 45 formed in a lattice shape by the distribution reinforcements 42, the load can be distributed to the ends 41 of the multiple main reinforcements 43 fixed to the multiple fixing holes 53, and therefore the reinforcing effect of the column body 10 is high.

[0052] Fig. 17 is a perspective view of the periphery of the lower structure 50 of the columnar structure 100C according to embodiment 2. The columnar structure 100C shown in Fig. 17 has end axial reinforcement 221 protruding from the end of the reinforcing bar member 220. The end axial reinforcement 221 is inserted into an anchoring hole 53 provided in the lower structure 50 and fixed by an anchoring filling member 61.

[0053] The end axial reinforcement 221 may be formed, for example, by partially removing the reinforcing bars 22 at the ends of the reinforcing bar members 20A and 20B shown in FIG. 4 or FIG.

[0054] The reinforcing bar member 220 shown in FIG. 17 has an integrally formed end axial reinforcement 221 that is directly fixed to the lower structure 50, so that the lower structure 50 and the reinforcing bar member 220 are firmly connected and the dimension in the thickness direction can also be reduced.

[0055] In embodiment 2, the reinforcement structure at the connection portion 11 between the lower structure 50 and the pillar 10 has been described, but the pillar structures 100A, 100B and 100C may also be provided with a similar reinforcement structure at the connection portion 12 between the upper structure 51 and the pillar 10.

[0056] Embodiment 3 The columnar structure 100 according to the third embodiment is an example of the columnar structure 100 according to the first embodiment in which a plurality of reinforcing bar members 20 are arranged in the axial direction of the column 10. In the third embodiment, the changes from the first embodiment will be mainly described.

[0057] FIG. 18 is a side view of the columnar structure 100 according to the third embodiment. In the columnar structure 100 according to the third embodiment, a plurality of reinforcing bar members 320A, 320B, and 320C are arranged in the axial direction of the column 10. As an example, the plurality of reinforcing bar members 320A, 320B, and 320C use the expansion-type reinforcing bar member 20B shown in FIG. 5. The expansion-type reinforcing bar member 20B has different strengths when a load is applied in a first direction along the main reinforcement 21 and when a load is applied in a direction perpendicular to the first direction, and has a higher strength when a load is applied in the first direction. Therefore, the column 10 can be efficiently reinforced by changing the first direction of the plurality of reinforcing bar members 320A, 320B, and 320C depending on the part of the column 10.

[0058] In Fig. 18, the reinforcing bar member 320A arranged at the lower end of the pillar 10 connected to the lower structure 50 has a first direction in which the main bars 21 extend aligned with the axial direction of the pillar 10. Moreover, the reinforcing bar member 320B arranged adjacent to the reinforcing bar member 320A has a first direction in which the main bars 21 extend aligned with the circumferential direction of the pillar 10. In other words, the reinforcing bar member 320A is installed so that the first direction intersects with the reinforcing bar member 320B (orthogonal to it in Fig. 18).

[0059] 18, reinforcing bar member 320C, which is disposed adjacent to reinforcing bar member 320B, is disposed with the first direction facing the axial direction of column body 10. In other words, reinforcing bar member 320C is installed so that the first direction intersects with reinforcing bar member 320B (orthogonal in FIG. 18). Note that reinforcing bar member 320A may be referred to as the first reinforcing bar member, reinforcing bar member 320B as the second reinforcing bar member, and reinforcing bar member 320C as the third reinforcing bar member.

[0060] In the third embodiment, the columnar structure 100 has reinforcing bar members 320A and 320C arranged near the connections 11 and 12 between the lower structure 50 and the upper structure 51 of the column 10, which are prone to large tensile stress due to bending moment. The reinforcing bar members 320A and 320C have high-strength main bars 21 oriented in the axial direction of the column 10, and the column 10 according to the third embodiment has a high reinforcing effect against tensile stress at its ends.

[0061] Furthermore, in the columnar structure 100, a reinforcing bar member 320B is arranged in the center of the column 10, which will deform and bulge when subjected to axial force F and break. The reinforcing bar member 320B has high-strength main bars 21 arranged in the circumferential direction of the column 10, so that the bulging deformation of the column 10 can be suppressed.

[0062] The ends of the multiple reinforcing bar members 320A, 320B, and 320C are overlapped to form joints 25. As a result, the multiple reinforcing bar members 320A, 320B, and 320C are connected via the filling member 60, so that the column body 10 is reinforced over the entire axial direction.

[0063] The reinforcing bar members 320A and 320C arranged at the end of the column body 10 may be fixed to the lower structure 50 or the upper structure 51 as described in the second embodiment. For example, the reinforcing bar member 320A may be provided with an end axial reinforcement 221 protruding toward the lower structure 50, and the end axial reinforcement 221 may be fixed to the lower structure 50.

[0064] In the third embodiment, three reinforcing bar members 320 are arranged in the axial direction of the pillar 10, but the pillar 10 may be reinforced with more reinforcing bar members 320, or may be reinforced with two pieces of reinforcing bar members 320A and 320B, for example. Also, the pillar 10 may have a configuration in which only the ends are reinforced with two pieces of reinforcing bar members 320A and 320C.

[0065] Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the above-mentioned embodiment. In particular, the combination of components is not limited to the combination in the embodiment, but can be changed as appropriate. In addition, it should be noted that the gist (technical scope) of the present invention also includes various modifications, applications, and uses that a person skilled in the art may make as necessary. [Explanation of symbols]

[0066] 10 column, 11 connection part, 12 connection part, 15 surface, 16 surface, 20 reinforcing bar member, 20A reinforcing bar member, 20B reinforcing bar member, 20a end, 20b end, 21 main bar, 21a projection, 22 distribution bar, 22a projection, 25 joint part, 25A joint part, 25B joint part, 26 step, 27 lattice, 40 anchor bar, 40A anchor lattice bar, 41 end, 42 distribution bar, 43 main bar, 44 other end, 45 lattice part, 50 lower structure, 51 upper structure, 53 anchor hole, 60 filling member, 61 filling member for anchoring, 80 wall, 100 columnar structure, 100A columnar structure, 100B columnar structure, 100C columnar structure, 110 Existing column, 115 surface, 120 axial reinforcement, 121 connecting member, 121a protrusion, 122 connecting member, 125 branch member, 160 filling member, 220 reinforcing bar member, 221 end axial reinforcement, 320 reinforcing bar member, 320A reinforcing bar member, 320B reinforcing bar member, 320C reinforcing bar member, 420 splice reinforcing bar member, 1010 column body, 1020 reinforcing bar structure, 1021 reinforcing axial reinforcement, 1022 reinforcing tie bars.

Claims

1. A column connected to the substructure; A reinforcing bar member arranged along the surface of the column body; A filling member that forms a surface of the column and covers the reinforcing bar member; and an anchor lattice fixed to the substructure or the superstructure; The reinforcing bar member is A plurality of first main reinforcements extending in a first direction; A first distribution reinforcement extending in a direction intersecting the first direction and connecting side surfaces of the plurality of first main reinforcements, The reinforcing bar member is formed by processing a steel plate, The first main reinforcement and the first distribution reinforcement are arranged on the same plane, The anchor lattice is A plurality of second main reinforcements extending in the first direction; A second distribution reinforcement extending in a direction intersecting the first direction and connecting side surfaces of the plurality of second main reinforcements, The anchor lattice is formed by processing a steel plate, The second main reinforcement and the second distribution reinforcement are arranged on the same plane, A columnar structure, wherein the reinforcing bar member is arranged to overlap the second main bar and the second distribution bar of the anchor grid bar in a direction perpendicular to the surface of the column body.

2. The reinforcing bar member is The pillar-shaped structure according to claim 1 , which is disposed along one of a plurality of side surfaces constituting the surface of the pillar.

3. The reinforcing bar member is The pillar-like structure according to claim 1 or 2, wherein the pillar-like structure is bent and disposed along two or more of a plurality of side surfaces constituting the surface of the pillar.

4. The reinforcing bar member is A plurality of reinforcing members are included. The plurality of reinforcing bar members include The pillar-like structure according to any one of claims 1 to 3, which is arranged in an axial or circumferential direction of the pillar body.

5. The plurality of reinforcing bar members include The columnar structure according to claim 4 , wherein connecting members protrude from the ends, and the connecting members are arranged in parallel to one another on the same plane along the surface of the columnar body.

6. The plurality of reinforcing bar members include The columnar structure according to claim 4 , wherein the columnar structure is arranged with its ends overlapping each other in a direction perpendicular to the surface of the columnar body.

7. The reinforcing bar member is The plurality of reinforcing bar members are arranged adjacent to each other, and a splice reinforcing bar member is included. The splice reinforcement member is The columnar structure according to claim 4 , which is arranged so as to overlap and straddle each end of the plurality of reinforcing bar members.

8. The reinforcing bar member is The column includes a plurality of reinforcing bar members and has a joint member protruding in a direction along a surface of the column, The plurality of reinforcing bar members include The columnar structure according to claim 4 , wherein the joining members are arranged so as to fit together.

9. The first direction of the reinforcing bar member is The pillar-like structure according to any one of claims 1 to 8, which is arranged parallel to the axial direction of the pillar in a side view of the pillar.

10. The first direction of the reinforcing bar member is The pillar-like structure according to any one of claims 1 to 8, which is arranged perpendicular to an axial direction of the pillar in a side view of the pillar.

11. Further comprising a rod-shaped anchor bar fixed to the substructure or the superstructure and extending parallel to the reinforcing bar member; The reinforcing bar member is The pillar-like structure according to any one of claims 1 to 10, wherein the anchor bars and the surface of the pillar are overlapped in a vertical direction.

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