C·S joint structure

Abstract

To enable easy and simple connection between members constituting a planar wall or slab and concrete members constituting a column or beam. [Solution] A C·S joint structure is provided for joining a concrete C member (9) constituting a column 6 or beam 7 and a steel S member (13) constituting a wall 4 or slab 80. The S member (13) comprises a steel frame body 16 extending along a plane that includes the direction of separation on the horizontal plane of the column 6 or beam 7 as the first extending direction, and a joint plate 17 integrally attached to the end of the steel frame body 16 in the first extending direction. The C member (9) is provided with a plurality of through holes (21) extending in the first extending direction of the S member (13), and the S member (13) is pressure-joined to the C member by a plurality of tension members 15 that are arranged to penetrate the joint plate 17 and the through holes of the C member (9) and have one end fixed to the joint plate 17.

Description

Technical Field

[0001] The present invention relates to a C·S joint structure for joining a C member made of concrete (hereinafter referred to as C structure) constituting a column or a beam and an S member made of a steel frame structure (hereinafter referred to as S structure) constituting a wall or a slab.

Background Art

[0002] In order to shorten the construction period, a precast construction method is known in which concrete members constituting a building such as a column or a beam are prefabricated in a factory or the like in advance, and the fabricated concrete members are assembled at a construction site to construct a building.

[0003] Patent Document 1 discloses a joint structure for precast concrete columns and beams. A joint portion is integrally formed at the lower end portion of the column member, and through holes for joining the beam main reinforcement of the beam member are formed in the joint portion. Further, a plurality of mechanical joints are embedded in one side portion of the beam member, and a plurality of beam main reinforcements are embedded in the beam member so as to protrude from the other end portion. The beam main reinforcement has a length corresponding to the through hole of the column member and the mechanical joint of the beam member in the horizontal direction of the column member. When joining the column member and the two beam members, the beam main reinforcement is slid so as to be inserted into the through hole and the mechanical joint of the other beam member extending in the horizontal direction of the column member. Thereby, the arrangement of the reinforcing bars is completed, and by filling the mechanical joint and the joint with a filler, the reinforcing bars are connected and the two beam members are joined to the column member. Thus, when joining a rod-shaped precast member such as a beam or a column to another precast member, the reinforcing bars and the members can be arranged at predetermined positions by sliding only in one direction.

[0004] On the other hand, when using precast construction for planar members such as walls or slabs, it is necessary to leave the reinforcing bars embedded in the panel in two directions, horizontally and vertically, protruding and connecting them to the reinforcing bars of other members. When joining a panel to a column or beam, it is possible to slide the panel in one direction to insert one reinforcing bar into the hole, but it is not possible to slide the panel in the other direction. Therefore, in order to connect the reinforcing bars without sliding, for example, the panel must be made smaller by the length of the overlap joint, and after the panel is placed, cast-in-place concrete must be poured into the space of the reinforcing bar joint.

[0005] One method for precasting slabs, which are surface materials, is the half-precast method, in which a portion of the thickness of the member is precast. Patent document 2 discloses a beam-slab structure using a half-precast floor slab. By placing the end of the half-precast floor slab at the end of the upper surface of the beam and pouring concrete on top of the floor slab and beam, a reinforced concrete slab can be formed. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-59849 [Patent Document 2] Japanese Patent Publication No. 2022-64690 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Thus, with regard to the facing material, both the precast method and the half-precast method require on-site concrete pouring, which makes the construction process time-consuming.

[0008] In view of the above background, the present invention aims to enable the easy and simple joining of a member constituting a planar wall or slab with a concrete member constituting a column or beam. [Means for solving the problem]

[0009] To solve the above problems, one aspect of the present invention provides a C·S joint structure for joining concrete C members (9, 70) constituting a column (6) or beam (7) and steel S members (13, 43, 63, 83) constituting a wall (4) or slab (80), wherein the S member comprises a steel frame body (16, 86) extending along a plane that includes the direction of separation on the horizontal plane of the column or beam as the first extending direction, and a joint plate (17, 87) integrally attached to the end of the steel frame body in the first extending direction, the C member is provided with a plurality of through holes (21, 84) extending in the first extending direction of the S member, and the S member is pressure-bonded to the C member by a plurality of tension members (15) that are arranged to penetrate the joint plate and the through holes of the C member and have one end fixed to the joint plate.

[0010] Here, member C may be any structure containing concrete, and may be reinforced concrete reinforced with reinforcing materials such as steel bars or fiber reinforcement, pre-stressed concrete with pre-stressing introduced by pre-stressing tensioners, or unreinforced concrete. Member C may preferably be reinforced concrete or reinforced concrete in a broad sense that includes pre-stressed concrete or pre-stressed concrete.

[0011] In this embodiment, one end of multiple tensioning members is fixed to a connecting plate, and the tensioning force of the tensioning members causes the S member to be compressed and joined to the C member. Since the wall or slab is made up of steel-framed S members, there is no need to connect reinforcing bars, and there is no need to pour concrete on site. Therefore, members constituting a planar wall or slab and C members constituting a column or beam can be joined with a simple structure and easily.

[0012] In the above embodiment, it is preferable that one end of the tensioning member has a male thread and is fixed to the joining plate by a nut (23) that is screwed onto the male thread.

[0013] According to this embodiment, the nut can be easily fixed to the joining plate by rotating it until it contacts the joining plate while the tensioning member is under tension.

[0014] In the above embodiment, the tensioning member is preferably an unbonded tensioning member that is not fixed to the C member.

[0015] According to this embodiment, tensioning members can be replaced, and S members and C members can be dismantled and reused.

[0016] In the above embodiment, the C member is preferably a column body member (9) that constitutes the column, and the S member is preferably a wall member (13, 43, 63) that constitutes the wall.

[0017] According to this embodiment, by fixing one end of a plurality of tensioning members to the joining plate of the wall member, the wall member can be pressed and joined to the column body member by the tensioning force of the tensioning members.

[0018] In the above embodiment, the steel frame body has a plate-like portion (19) extending in the vertical direction and a pair of flange portions (18) provided at the upper and lower ends of the plate-like portion, the joining plate extends left and right from the edge of the plate-like portion, and the tensioning members are preferably arranged on both the left and right sides of the plate-like portion on the joining plate.

[0019] According to this embodiment, the rigidity of the steel-framed wall members is increased, and the rigidity of the wall members relative to the column body members is also increased.

[0020] In the above embodiment, it is preferable that a length adjustment member (25) is placed between the column body member and the wall member, and that the wall member is crimped and joined to the C member via the length adjustment member.

[0021] According to this embodiment, S members can be used for walls of various lengths depending on the length and number of length adjustment members, thereby increasing the versatility of S members.

[0022] In the above aspect, a pair of the column main body members are arranged to be separated from each other with a first separation distance (D1) on a horizontal plane, and a plurality of the wall members (43) having a length (L1) smaller than the first separation distance are arranged in the first extending direction between the pair of the column main body members.

[0023] According to this aspect, since the horizontal dimension of each wall member becomes small, the handling of the wall member becomes easy.

[0024] In the above aspect, a length adjusting member (45) is arranged between two of the wall members, and the two wall members are pressure-bonded to each other via the length adjusting member.

[0025] According to this aspect, depending on the length and number of the length adjusting members, wall members of various lengths can be made using the S members, and the versatility of the S members is enhanced.

[0026] In the above aspect, the flange portion at the upper end of the steel frame main body is preferably pressure-bonded or bolted to the steel beam of the steel frame structure arranged above.

[0027] According to this aspect, since the wall member is joined not only to the column main body member but also to the upper steel beam, the rigidity of the wall member with respect to the column-beam structure is increased. <0000l00> In the above aspect, the flange portion at the lower end of the steel frame main body is preferably pressure-bonded or bolted to the steel beam of the steel frame structure arranged below.

[0029] According to this aspect, since the wall member is joined not only to the column main body member but also to the lower steel beam, the rigidity of the wall member with respect to the column-beam structure is increased.

[0030] In the above aspect, a pair of the beams are arranged to be separated from each other with a second separation distance (D2) in the vertical direction, and a plurality of the wall members (63) having a height (H1) smaller than the second separation distance are arranged in the vertical direction between the pair of the beams.

[0031] According to this embodiment, the vertical dimensions of each wall member are reduced, making it easier to handle the wall members.

[0032] In the above embodiment, the beam is made of concrete, and the S member forms a seismic wall fitted into a concrete column-beam frame.

[0033] According to this embodiment, the S member can function as a seismic wall, thereby improving the seismic performance of the concrete column-beam frame.

[0034] In the above embodiment, it is preferable that the C member is a beam member (70) constituting the beam, and the S member is a slab member (83) constituting the slab.

[0035] According to this embodiment, by fixing one end of a plurality of tensioning members to the joining plate of the slab member, the slab member can be compressed and joined to the beam member by the tensioning force of the tensioning members. [Effects of the Invention]

[0036] According to the above embodiment, members constituting a planar wall or slab and C members constituting a column or beam can be joined easily with a simple structure. [Brief explanation of the drawing]

[0037] [Figure 1] Perspective view showing the foundation, frame, and walls of a building according to the first embodiment. [Figure 2] Side cross-sectional view of the wall joint structure shown in Figure 1. [Figure 3] Plan section along line III-III in Figure 2 [Figure 4] A perspective view showing a partially transparent view of the wall joint structure shown in Figure 1. [Figure 5] Side cross-sectional view showing the schematic configuration of the wall joint structure according to the second embodiment. [Figure 6] Plan section along the line VI-VI in Figure 5 [Figure 7]Side cross-sectional view showing the schematic configuration of the wall joint structure according to the third embodiment. [Figure 8] Side cross-sectional view showing the schematic configuration of the wall joint structure according to the fourth embodiment. [Figure 9] Plan section along line IX-IX in Figure 8 [Figure 10] Side cross-sectional view showing the schematic configuration of the wall joint structure according to the fifth embodiment. [Figure 11] A perspective view showing the schematic configuration of the wall joint structure according to the sixth embodiment. [Figure 12] Side cross-sectional view showing the schematic configuration of the wall joint structure according to the seventh embodiment. [Figure 13] A perspective view showing a schematic configuration of the slab joint structure according to the eighth embodiment, partially viewed from above. [Figure 14] Side cross-sectional view showing the schematic configuration of the slab joint structure according to the eighth embodiment. [Modes for carrying out the invention]

[0038] Several embodiments of the present invention will be described in detail below with reference to the drawings. ≪First Embodiment≫

[0039] First, a first embodiment of the present invention will be described with reference to Figures 1 to 4. Figure 1 is a perspective view showing the foundation, frame, and walls 4 of a building 1 according to the first embodiment to which the C·S joint structure of the present invention is applied. As shown in Figure 1, the building 1 is equipped with a pile foundation 2. The pile foundation 2 is equipped with a plurality of piles 3 arranged in the X direction (length direction) and Y direction (span direction) perpendicular to each other on the horizontal plane. The building 1 is also equipped with a superstructure 5, including walls 4, which is constructed on the pile foundation 2 and supported by the pile foundation 2. The superstructure 5 is equipped with a plurality of columns 6 provided at positions corresponding to the piles 3, a plurality of beams 7 connecting pairs of columns 6 adjacent to each other in the X direction or Y direction, and walls 4 provided on a structural plane surrounded by pairs of adjacent columns 6 and pairs of adjacent beams 7. The building 1 is a multi-story building in which the superstructure 5 has multiple floors, but only the lowest floor is shown in Figure 1. The walls 4 are provided along the X direction and Y direction. Only the walls 4 in the X direction are shown in Figure 1.

[0040] Figure 2 is a side cross-sectional view of the wall joint structure shown in Figure 1. The C·S joint structure of the present invention is applied to this wall joint structure. As shown in Figure 2, each column 6 is composed of multiple column members made of precast concrete (PCa) C-structure (concrete structure). Each column member on the first floor has a joint member 8 that constitutes the joint portion of the column 6 to which the beam 7 is joined, and a column body member 9 that constitutes the portion of the column 6 other than the joint portion. The column body member 9 and the joint member 8 are arranged alternately on the pile foundation 2. Except for the top floor, the column body member 9 is arranged above and below the joint member 8.

[0041] In this embodiment, the joint portion and the column body portion of the column 6 are formed by separate members, and one floor portion of the column 6 is formed by two or more precast concrete (PCa) members. However, in other embodiments, one floor portion of the column 6 may be formed by a single column member. Alternatively, one floor portion of the column 6 may be formed by three or more concrete (C) column members.

[0042] Each beam 7 is composed of a steel beam member 10 and extends in the X or Y direction. The length of the beam member 10 is the same as or slightly shorter than the distance between an adjacent pair of columns 6. The beam member 10 is positioned between an adjacent pair of columns 6 and connects a pair of joint members 8. The beam member 10 comprises a beam body portion 11 that extends in the material axis direction (X or Y direction) of the beam 7, and a plate-shaped beam end plate 12 integrally provided at the material axis end of the beam body portion 11.

[0043] The beam body 11 is an I-beam or H-beam with an upper flange, a lower flange, and a web connecting the two flanges. The beam end plate 12 is made of steel plate and is joined to the beam body 11 perpendicular to the direction of the material axis. The beam end plate 12 is joined to the corresponding joint member 8 by bolting or by compression joining using tensioning members 15 (see Figure 2), similar to the C·S joint structure described later.

[0044] The beam body 11 is not limited to I-beams or H-beams, but may also be structural steel made of channel steel or square steel pipes, or box-shaped steel made by welding steel plates.

[0045] Wall 4 is constructed of a steel wall member 13. The wall member 13 comprises a steel frame body 16 extending along a plane that includes the direction of separation of a pair of adjacent columns 6 (for example, the X direction) as the first extending direction, and a connecting plate 17 integrally attached to the end of the steel frame body 16 in the first extending direction. The steel frame body 16 also extends in the vertical direction as a second extending direction perpendicular to the first extending direction. The steel frame body 16 has a pair of flange portions 18 spaced apart at its upper and lower ends so as to face each other, and a plate-like portion 19 (web plate) connecting the pair of flange portions 18. The connecting plate 17 is a steel plate and is joined to both ends of the steel frame body 16 in the first extending direction by welding. The connecting plate 17 is also joined to the corresponding column body member 9.

[0046] Figure 3 is a plan cross-sectional view along the line III-III in Figure 2. Figure 4 is a perspective view showing a partially transparent view of the wall joint structure shown in Figure 1. As shown in Figures 3 and 4, the joint plate 17 is welded to both ends of the steel frame body 16 in the first extending direction, perpendicular to the first extending direction. That is, the joint plate 17 is formed to extend to the left and right from the edge of the plate-like portion 19. This configuration increases the rigidity of the wall member 13.

[0047] Next, a column-wall joint structure between a concrete column body member 9 and steel wall members 13 arranged on both sides of the column 6 will be described. The column body member 9 and the two wall members 13 are arranged in a line in the first extending direction. Multiple first through-holes 21 are formed on the surface of the column body member 9 to which the joining plate 17 is joined, each forming part of a tension member insertion hole 20 for inserting a tension member 15. Specifically, as viewed from the wall member 13 side, seven first through-holes 21 are formed in a line in the vertical direction on both the right and left portions of the column body member 9. Each first through-hole 21 extends parallel to each other along the first extending direction. The first through-holes 21 may be defined by a sheath embedded in the column body member 9. Alternatively, the first through-holes 21 may be formed as a concrete defect created by the sheath removed after concrete pouring of the column body member 9.

[0048] In the connecting plate 17, a plurality of second through holes 22 are formed at positions that align with the first through hole 21 of the column body member 9, extending parallel to each other along the first extending direction. The second through holes 22 are formed in the left and right portions of the connecting plate 17, centered on the edge of the plate-like portion 19.

[0049] The two wall members 13 are positioned on both sides of the column body member 9, i.e., sandwiching the column body member 9, such that the second through-holes 22 of each connecting plate 17 align with the first through-holes 21 of the column body member 9. As a result, the first through-holes 21 of the column body member 9, the second through-holes 22 of the wall member 13 positioned on one side of the column body member 9, and the second through-holes 22 of the wall member 13 positioned on the other side of the column body member 9 are continuous with each other. The one first through-hole 21 and the two second through-holes 22 that are continuous with each other form a tension member insertion hole 20 extending in the first extending direction, spanning the column body member 9 and the two wall members 13.

[0050] A tension member 15 is positioned in each tension member insertion hole 20 so as to penetrate the tension member insertion hole 20. In this embodiment, the tension member 15 is made of PC steel bar and has male threads at both ends. On the side of the joining plate 17 opposite to the end face that is joined to the column body member 9 (hereinafter referred to as the side end face), a nut 23 is positioned so as to screw onto the male thread of each tension member 15. The nut 23 is rotated until each tension member 15 contacts the side end face while under tension. As a result, the end of the tension member 15 is fixed to the joining plate 17 via the nut 23. In other words, the nut 23 is a fixing device that fixes the end of the tension member 15 to the joining plate 17.

[0051] In this way, the wall member 13 is press-fitted to the column body member 9 by the tension of the tensioning member 15. That is, by fixing one end of multiple tensioning members 15 to the joining plate 17 of the wall member 13, the wall member 13 can be press-fitted to the column body member 9 by the tension of the tensioning member 15. Therefore, in order to press-fit a steel-framed wall member 13 to a concrete-framed column body member 9, the wall member 13 and the column body member 9 can be joined with a simple structure and easily, without connecting reinforcing bars or pouring concrete on site.

[0052] Furthermore, one end of the tensioning member 15 has a male thread, and it is joined to the connecting plate 17 by a nut 23 that screws onto this male thread. Therefore, by rotating the nut 23 until it contacts the connecting plate 17 while the tensioning member 15 is under tension, the nut 23 can be easily fixed to the connecting plate 17. As a method of tensioning the tensioning member 15, a jack can be attached to one end of the tensioning member 15, and tensioning force can be applied by pulling the tensioning member 15.

[0053] The tensioning members 15 are positioned on both the left and right sides of the connecting plate 17 when viewing the column body member 9 from the wall member 13 side, and the wall member 13 is compressed and joined to the column body member 9. Therefore, the rigidity of the wall member 13 relative to the column body member 9 can be increased.

[0054] In this embodiment, the tensioning member 15 has male threads at both ends, but in other embodiments, the tensioning member 15 may have male threads at only one end. For example, one end of the tensioning member 15 may be male threaded, and the other end may be provided with a widened portion that widens to engage with the joining plate 17. Furthermore, the fixing device is not limited to a nut 23, but can be any device that can fix the tensioning member 15 in a tensioned state, such as an anchor head including a wedge.

[0055] In this embodiment, no filler material is used in the joints between each tensioning member insertion hole 20 and each connecting plate 17 and the column body member 9. In other words, the tensioning members 15 are unbonded tensioning members that are not fixed to the column body member 9. This allows for the replacement of the tensioning members 15 and the dismantling and reuse of the wall member 13 and the column body member 9. ≪Second Embodiment≫

[0056] A second embodiment of the present invention will be described with reference to Figures 5 and 6. Elements identical or similar to those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. The same applies to subsequent embodiments unless otherwise specified.

[0057] Figure 5 is a side cross-sectional view showing the schematic configuration of the wall joint structure according to the second embodiment, and Figure 6 is a plan cross-sectional view along the line VI-VI in Figure 5. This embodiment differs from the first embodiment in that a length adjustment member 25 is arranged between the column body member 9 and the joint plate 17 of each wall member 13 joined thereto.

[0058] The length adjustment member 25 is a vertically elongated block-shaped PCa member (i.e., a C member) and is positioned between a pair of columns 6 to adjust the length of the wall 4 (length in the first extending direction). In this embodiment, the height and width of the length adjustment member 25 are the same as the height and width of the column body member 9. In other embodiments, the height and width of the length adjustment member 25 may differ from the height and width of the column body member 9, and the length adjustment member 25 may be divided in the height direction. Multiple third through holes 26 are formed in the length adjustment member 25 at positions that align with each first through hole 21 of the column body member 9 and each second through hole 22 of the connecting plate 17. Each third through hole 26 extends parallel to each other in the first extending direction.

[0059] Next, a column-wall joint structure in which length adjustment members 25 are arranged will be described. The length adjustment members 25 are positioned near both sides of the column body member 9, that is, between the column body member 9 and the joint plate 17, such that one end of each third through hole 26 aligns with each first through hole 21 of the column body member 9, and the other end aligns with each second through hole 22 of the joint plate 17. As a result, each first through hole 21 of the column body member 9, each third through hole 26 of the length adjustment members 25 arranged on both sides of the column body member 9, and each second through hole 22 of the wall member 13 arranged on one side of each length adjustment member 25 are continuous with each other. The one first through hole 21, two third through holes 26, and two second through holes 22 that are continuous with each other form a tension member insertion hole 20 extending in the first extending direction, spanning the column body member 9, the two length adjustment members 25, and the two wall members 13.

[0060] A tension member 15 is placed in each tension member insertion hole 20, and nuts 23 are placed at both ends of each tension member 15. The column body member 9, the two length adjustment members 25, and the two wall members 13 are joined by crimping using the tension members 15 and nuts 23, as in the first embodiment. Since the wall members 13 are joined by crimping to the column body member 9 via the length adjustment members 25, the same wall member 13 can be used for walls 4 of various lengths without changing the length of the wall member 13 in the first extending direction by changing the length of the length adjustment members 25. This increases the versatility of the wall member 13.

[0061] In this embodiment, identical length adjustment members 25 are arranged on both sides of the column body member 9, but length adjustment members 25 of different lengths may be arranged, or the length adjustment members 25 may be arranged on only one side of the column body member 9. Furthermore, the length adjustment members 25 are not limited to block-shaped C members, but may also be S members including, for example, two steel plates arranged opposite each other in the first extending direction and a web plate connecting the two steel plates.

[0062] In this embodiment, a length adjustment member 27 is also placed between the joint member 8 and the beam end plate 12 of each beam member 10 joined to it, in order to adjust the length of the beam 7. The joining structure of the beam member 10 to the joint member 8 is a compression joint structure that utilizes the tension of the tensioning member 15. This joining structure is the same as the joining structure of the wall member 13 to the column body member 9. Therefore, a detailed explanation is omitted. ≪Third Embodiment≫

[0063] A third embodiment of the present invention will be described with reference to Figure 7. Figure 7 is a side cross-sectional view showing the schematic configuration of a wall joint structure according to the third embodiment. This embodiment differs from the second embodiment in that a plurality of length adjustment members 25 are arranged between the left column body member 9 and the joint plates 17 of each wall member 13. Therefore, elements that are the same or similar as in the second embodiment are denoted by the same reference numerals, and redundant explanations are omitted.

[0064] In this embodiment, two length adjustment members 25 are positioned between the left column body member 9 and the wall member 13. Specifically, one length adjustment member 25 is positioned such that one end of each third through hole 26 aligns with each first through hole 21 of the column body member 9, and the other end aligns with each third through hole 26 of the other length adjustment member 25. The other length adjustment member 25 is positioned such that one end of each third through hole 26 aligns with each third through hole 26 of the first length adjustment member 25, and the other end aligns with each second through hole 22 of the joining plate 17. As a result, each first through hole 21 of the column body member 9, each third through hole 26 of the two length adjustment members 25 positioned on both sides of the column body member 9, and each second through hole 22 of the wall member 13 positioned on one side of the other length adjustment member 25 are continuous with each other. Through one continuous first through-hole 21, four third through-holes 26, and two second through-holes 22, tension member insertion holes 20 extending in the first extending direction are formed across the column body member 9, two length adjustment members 25, and two wall members 13.

[0065] The left column body member 9, the four length adjustment members 25, and the two wall members 13 are joined by pressure using tensioning members 15 and nuts 23, similar to the second embodiment. Multiple length adjustment members 25 are positioned between the column body member 9 and each joining plate 17. By changing the number of length adjustment members 25, the same wall member 13 and length adjustment members 25 can be used for walls 4 of various lengths without changing the length of the wall member 13 in the first extending direction. This increases the versatility of the wall member 13 and length adjustment members 25.

[0066] The number of length adjustment members 25 between the column body member 9 and the wall member 13 is not limited to two, but may be three or more. In this embodiment, the same number of length adjustment members 25 are arranged on both sides of the column body member 9, but different numbers of length adjustment members 25 may be arranged on each side, or the length adjustment members 25 may be arranged on only one side of the column body member 9. ≪Fourth Embodiment≫

[0067] A fourth embodiment of the present invention will be described with reference to Figures 8 and 9. Figure 8 is a side cross-sectional view showing the schematic configuration of the wall joint structure according to the fourth embodiment, and Figure 9 is a plan cross-sectional view along the line IX-IX in Figure 8. This embodiment differs from the second embodiment in that the wall member 43 is divided into multiple parts (two in the illustrated example) in the first extending direction (length direction) of the wall 4, and the length adjustment member 45 is arranged between the two wall members 43. Therefore, elements that are the same or similar as in the second embodiment are denoted by the same reference numerals, and redundant explanations are omitted.

[0068] The lengths L1 of both wall members 43 in the first extending direction are the same. If the distance between a pair of adjacent columns 6 is the first separation distance D1, then the length L1 of each wall member 43 is shorter than half of the first separation distance D1. In other embodiments, one of the wall members 43 may be longer than the other. In any case, the length L1 of each wall member 43 is shorter than the first separation distance D1.

[0069] As shown in Figure 8, two wall members 43 and three length adjustment members 25, 45 are arranged in the first extending direction between a pair of adjacent columns 6. The joining plates 17 on the adjacent sides of the wall members 43 are joined to each other via the length adjustment members 45. That is, the length adjustment members 45 are positioned between two wall members 43. In this embodiment, the joining structure of the column body member 9 and the wall members 43 is the same as in the other embodiments described above, so a description will be omitted, and the joining structure of the wall members 43 via the length adjustment members 45 will be described.

[0070] The length adjustment member 45 has multiple third through holes 46 formed such that one end aligns with each second through hole of one joining plate 17 and the other end aligns with each second through hole 22 of the other joining plate 17. As a result, each third through hole 46 of the length adjustment member 45, each second through hole 22 of the wall member 43 located on one side of the length adjustment member 45, and each second through hole 22 of the wall member 43 located on the other side of the length adjustment member 45 are continuous with each other. The one third through hole 46 and the two second through holes 22 that are continuous with each other form a tension member insertion hole 20 that extends in the first extending direction, spanning the length adjustment member 45 and the two wall members 43.

[0071] The length adjustment member 45 and the two wall members 43 are joined by crimping using the tensioning member 15 and the nut 23, similar to the first embodiment. That is, the two wall members 43 are connected to each other via the length adjustment member 45. Because the two wall members 43 are joined to each other by crimping via the length adjustment member 45, the same wall member 43 can be used for walls 4 of various lengths without changing the length L1 in the first extending direction of the wall member 43 by changing the length or number of length adjustment members 45. Therefore, the versatility of the wall member 43 is increased.

[0072] Furthermore, by using two wall members 43 having a length L1 smaller than the first separation distance D1 between a pair of adjacent columns 6, the dimensions of each wall member 43 in the first extending direction become smaller, making it easier to handle the wall members 43.

[0073] The number of wall members 43 placed between a pair of column body members 9 is not limited to two, but may be three or more. Furthermore, the number of length adjustment members 45 placed between a pair of wall members 43 is not limited to one, but may be two or more.

[0074] In this embodiment, similar to the wall member 43, the beam member 10 is also divided into multiple sections (two in the illustrated example) in the first extending direction of the wall 4, and a length adjustment member 47 is positioned between the two beam members 10. The joint structure of the two beam members 10 via the length adjustment member 47 is a compression joint structure that utilizes the tension force of the tensioning member 15. This joint structure is the same as the joint structure of the two wall members 43 via the length adjustment member 45. Therefore, a detailed explanation is omitted. ≪Fifth Embodiment≫

[0075] A fifth embodiment of the present invention will be described with reference to Figure 10. Figure 10 is a side cross-sectional view showing the schematic configuration of a wall joint structure according to the fifth embodiment. This embodiment differs from the first embodiment in that the wall member 13 is joined to the beam member 10.

[0076] In this embodiment, the joint structure between the column body member 9 and the wall member 13 is the same as in the other embodiments described above, so its explanation will be omitted, and the joint structure between the beam member 10 and the wall member 13 will be described.

[0077] Multiple first connecting holes 51 are formed in the upper and lower flange portions 18 of the beam member 10, extending parallel to each other in the vertical direction. In addition, multiple second connecting holes 52 are formed in the upper and lower flange portions 18 of the wall member 13, at positions that align with the first connecting holes 51 of the beam member 10 to which the wall member 13 is joined, and extending parallel to each other in the vertical direction.

[0078] The wall member 13 is positioned between the two beam members 10. At this time, each second connecting hole 52 of the upper flange portion 18 aligns with each first connecting hole 51 of the beam member 10 positioned above the wall member 13. Similarly, each second connecting hole 52 of the lower flange portion 18 aligns with each first connecting hole 51 of the beam member 10 positioned below the wall member 13. As a result, each first connecting hole 51 of the beam member 10 positioned above the wall member 13 and each second connecting hole 52 of the upper flange portion 18 of the wall member 13 are continuous. Similarly, each first connecting hole 51 of the beam member 10 positioned below the wall member 13 and each second connecting hole 52 of the lower flange portion 18 of the wall member 13 are also continuous. The mutually continuous first connecting holes 51 and second connecting holes 52 form a beam-wall connecting hole 53 that extends vertically across the wall member 13 and each beam member 10.

[0079] A tensioning member 15 is placed in each beam-wall connecting hole 53, and nuts 23 are placed at both ends of each tensioning member 15. Each steel beam member 10 and the steel wall member 13 are joined by pressure using the tensioning members 15 and nuts 23, similar to the first embodiment. By joining the wall member 13 not only to the column body member 9 but also to the upper and lower beam members 10, the rigidity of the wall member 13 with respect to the column-beam structure is increased.

[0080] In this embodiment, the wall member 13 is joined to two beam members 10 in the vertical direction, but in other embodiments, it may be joined to only the upper or lower beam member 10. Furthermore, the method of joining the wall member 13 and the beam members 10 is not limited to compression joining, but may also be bolt joining. ≪Sixth Embodiment≫

[0081] A sixth embodiment of the present invention will be described with reference to Figure 11. Figure 11 is a perspective view showing a schematic configuration of a wall joint structure according to the sixth embodiment. However, in Figure 11, a portion of each wall member 63 is cut out to show that multiple wall members 63 are arranged in the vertical direction. This embodiment differs from the first embodiment in that multiple (three in the illustrated example) wall members 63, which are divided in the second extending direction (vertical direction) of the wall 4, are arranged in the vertical direction between a pair of vertically adjacent beam members 10.

[0082] The height H1 of each wall member 63 is the same. If the distance between a pair of vertically adjacent beams 7 is defined as the second separation distance D2, then the height H1 of each wall member 63 is set to 1 / 3 of the second separation distance D2. In other embodiments, multiple wall members 63 may be formed at different heights. In any case, the height H1 of each wall member 63 is smaller than the second separation distance D2.

[0083] As shown in Figure 11, multiple wall members 63 are arranged between a pair of vertically aligned beam members 10. The connecting plates 17 at both ends of each wall member 63 are crimped to a pair of column body members 9 using tensioning members 15 and nuts 23, similar to the first embodiment. By using multiple wall members 63 having a height H1 smaller than the second separation distance D2 between adjacent pairs of beams 7, the vertical dimensions of each wall member 63 are reduced, making it easier to handle the wall members 63.

[0084] In this embodiment, separate members are used for the wall member 63 and the beam member 10, but the same member may be used. Alternatively, the joining structure of the beam member 10 and the wall member 13 in the fifth embodiment may be combined. ≪Seventh Embodiment≫

[0085] A seventh embodiment of the present invention will be described with reference to Figure 12. Figure 12 is a side cross-sectional view showing the schematic configuration of a wall joint structure according to the seventh embodiment. This embodiment differs from the first embodiment in that the beam member 70 is made of carbon fiber.

[0086] Each beam 7 is composed of a beam member 70 made of precast concrete (PCa). The beams 7 are joined to the joint members 8 by beam main reinforcement (not shown) and mechanical joints. Alternatively, a portion of the beam 7 may be integrally formed with the joint members 8.

[0087] As shown in Figure 12, the wall member 13 is joined to the column body member 9 by pressure bonding using tensioning members 15 and nuts 23, similar to the first embodiment. By using the steel wall member 13, the wall member 13 can function as a seismic wall, thereby improving the seismic performance of the concrete column-beam frame. ≪Eighth Embodiment≫

[0088] An eighth embodiment of the present invention will be described with reference to Figures 13 and 14. Figure 13 is a perspective view showing a schematic configuration of the slab joint structure according to the eighth embodiment, and Figure 14 is a side cross-sectional view showing a schematic configuration of the slab joint structure according to the eighth embodiment.

[0089] In this embodiment, a C·S joint structure is applied to the beam-slab connection structure. Each beam 7 is composed of a C beam member 70. The beam member 70 is joined to the joint member 8 by a joint structure similar to that of the seventh embodiment. A slab 80 is provided in a rectangular horizontal area enclosed by a pair of beams 7 adjacent to each other in the X direction and a pair of beams 7 adjacent to each other in the Y direction.

[0090] The beam member 70 has a plurality of fourth through-holes 84 that extend parallel to each other along the X or Y direction perpendicular to the beam 7's axis direction. Specifically, when viewed from the slab 80 side, a plurality of (two in the illustrated example) fourth through-holes 84 are formed in a line in the vertical direction. The fourth through-holes 84 are formed at predetermined intervals along the beam 7's axis direction.

[0091] The slab 80 is composed of steel-framed slab members 83. The slab members 83 are approximately the same size as, or slightly smaller than, the structural plane enclosed by a pair of beams 7 adjacent in the X direction and a pair of beams 7 adjacent in the Y direction. In other embodiments, the slab members 83 may be divided into multiple sections in the X or Y direction.

[0092] The slab member 83 comprises a horizontally extending steel frame body 86 and a connecting plate 87 integrally attached to the X or Y end of the steel frame body 86. The steel frame body 86 has an upper plate 88, a lower plate 89, and a connecting portion 90 that connects the upper plate 88 and the lower plate 89. The upper plate 88 and the lower plate 89 are arranged at a distance shorter than the height of the beam member 70 in the vertical direction, and the connecting portion 90 holds the upper plate 88 and the lower plate 89 at a constant interval.

[0093] The connecting plate 87 is attached to connect the X- or Y-direction edges of the upper plate 88 and the lower plate 89 in the vertical direction. The connecting plate 87 has a plurality of fifth through-holes 91 formed in positions that align with the fourth through-hole 84 of the beam member 70. Each fifth through-hole 91 is formed parallel to each other along the extending direction of the fourth through-hole 84.

[0094] The two slab members 83 are positioned on either side of the beam member 70, i.e., sandwiching the beam member 70, such that each fifth through-hole 91 of the joining plate 87 aligns with each fourth through-hole 84 of the beam member 70. As a result, each fourth through-hole 84 of the beam member 70, each fifth through-hole 91 of the slab member 83 positioned on one side of the beam member 70, and each fifth through-hole 91 of the slab member 83 positioned on the other side of the beam member 70 are continuous with each other. The continuous fourth through-hole 84 and the two fifth through-holes 91 form tension member insertion holes 92 extending in the X or Y direction across the slab member 83 and the two beam members 70.

[0095] A tension member 15 is placed in each tension member insertion hole 92, and nuts 23 are placed at both ends of each tension member 15. Similar to the first embodiment, the nuts 23 are rotated until each tension member 15 is tensioned and contacts the opposite end face of the joining plate 87 that is joined to the beam member 70. This fixes the ends of the tension members 15 to the joining plate 87 via the nuts 23. With multiple tension members 15 fixed to the joining plate 87 via the nuts 23, the slab member 83 can be pressed and joined to the beam member 70 by the tension force of the tension members 15.

[0096] This concludes the description of specific embodiments. However, the present invention is not limited to the above embodiments or modifications and can be broadly modified and implemented. For example, a C-S joint structure may be used when constructing an additional wall 4 or slab 80 in an existing building 1 where the column body member 9 and beam member 70 are made of C. Also, in the above embodiments, the tensioning member 15 is an unbonded tensioning member that is not fixed to the column body member 9 and beam member 70, but it may also be a bonded type that is fixed to those members by a filler. The tensioning member 15 is not limited to PC steel bars, and may be, for example, PC steel strands, high-strength reinforcing bars, or rods or cables made of fiber-reinforced plastic such as aramid fiber, carbon fiber, or glass fiber. In addition, the specific configuration, arrangement, quantity, material, etc. of each member or part can be changed as appropriate, as long as it does not depart from the spirit of the present invention. Furthermore, not all of the components shown in the above embodiments are necessarily essential and can be selected as appropriate. [Explanation of Symbols]

[0097] 1: Building 5:Superstructure 6: Pillar 7: Beam 9: Column main body components (column members, C members) 10: Beam member (S member) 13: Wall members (S members) 15: Tensile material 16: Steel frame main body 17: Joining plate 18: Flange section 19: Plate-like part 21: First through hole 23: Nut 25: Length adjustment member 43: Wall member (S member) 45: Length adjustment member 63: Wall member (S member) 70: Beam member (C member) 80: Slab 83: Slab member (S member) 84: Fourth through hole 86: Steel frame main body 87: Joining plate D1: 1st separation distance D2: 2nd separation distance L1: Length of wall member 43 H1: Height of wall member 63

Claims

1. A C-S joint structure for joining a concrete C member that constitutes a column or beam and a steel S member that constitutes a wall or slab, The S member comprises a steel frame body extending along a plane that includes the direction of separation on the horizontal plane of the column or beam as the first extending direction, and a connecting plate integrally attached to the end of the steel frame body in the first extending direction. The C member is provided with a plurality of through holes extending in the first extending direction of the S member, The C-S joint structure is characterized in that the S member is crimped and joined to the C member by a plurality of tensioning members, each having one end fixed to the joining plate and positioned to penetrate the through-holes of the joining plate and the C member.

2. The C-S joint structure according to claim 1, wherein one end of the tensioning member has a male thread and is fixed to the joint plate by a nut that is screwed onto the male thread.

3. The C-S joint structure according to claim 1, wherein the tensioning material is an unbonded tensioning material that is not fixed to the C member.

4. The C-S joint structure according to claim 1, wherein the C member is a column body member constituting the column, and the S member is a wall member constituting the wall.

5. The steel frame body has a plate-like portion extending in the vertical direction and upper and lower flange portions provided at the upper and lower ends of the plate-like portion. The C-S joint structure according to claim 4, wherein the joining plate extends to the left and right from the edge of the plate-like portion, and the tensioning members are arranged on both the left and right sides of the plate-like portion in the joining plate.

6. The C-S joint structure according to claim 4, wherein a length adjustment member is arranged between the column body member and the wall member, and the wall member is pressure-bonded to the C member via the length adjustment member.

7. The C-S joint structure according to claim 4, wherein a pair of column body members are arranged on a horizontal plane so as to be separated by a first separation distance, and a plurality of wall members having a length smaller than the first separation distance are arranged between the pair of column body members in the first extending direction.

8. The C-S joint structure according to claim 7, wherein a length adjustment member is positioned between the two wall members, and the two wall members are crimped and joined to each other via the length adjustment member.

9. The C-S joint structure according to claim 5, wherein the flange portion at the upper end of the steel frame body is joined by pressure or bolt to the steel beam positioned above.

10. The C-S joint structure according to claim 5, wherein the flange portion at the lower end of the steel frame body is crimp-jointed or bolt-jointed to the steel beam positioned below.

11. The C-S joint structure according to claim 4, wherein a pair of beams are arranged so as to be separated by a second separation distance in the vertical direction, and a plurality of wall members having a height smaller than the second separation distance are arranged vertically between the pair of beams.

12. The C-S joint structure according to claim 4, wherein the beam is made of concrete and the S member forms a seismic wall fitted into a concrete column-beam frame.

13. The C-S joint structure according to claim 1, wherein the C member is a beam member constituting the beam, and the S member is a slab member constituting the slab.

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