Joint structure

Abstract

To provide a joint structure between a pillar and a wooden beam that has high strength and allows easy construction of the wooden beam. [Solution] The joint structure 10 joins a column 3 and a wooden beam 1. The wooden beam 1 is formed by stacking a pair of beams 2 in the beam width direction so that the opposing surfaces, which are the side surfaces in the beam axis direction of the beams 2, face each other. In the joint structure 10, a steel plate 4 protruding outward from the column 3 is inserted into a slit 11 at the end of the wooden beam 1 on the column 3 side. The slit 11 is formed by a notch 21 provided on each of the opposing surfaces of the pair of beams 2. A pair of steel plates 4 and slits 11 are provided, one above the other.

Description

[Technical Field]

[0001] The present invention relates to a joint structure between a pillar and a wooden beam. [Background technology]

[0002] When joining wooden columns and wooden beams, it is common practice to insert a steel rod, such as a GIR (Glue In Rod), which protrudes from the wooden column into a hole in the wooden beam in the direction of the beam axis, and then fill the hole with a filler material such as adhesive to create a rigid joint between the wooden column and the wooden beam. On the other hand, Patent Document 1 discloses a joint structure for a concrete column and a wooden beam, in which, similarly to the above, a steel rod protruding from the concrete column is inserted into a hole in the wooden beam in the direction of the beam axis, and the hole is filled with a filler material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6876451 Summary of the Invention [Problem to be solved by the invention]

[0004] These joint structures use rod-shaped members to connect columns and beams, but in some cases, a joint structure with higher load-bearing capacity is required. Furthermore, the joint structure described in Patent Document 1 requires moving the wooden beam in the beam axis direction and inserting the steel rod into a hole in the beam axis direction, which makes construction difficult when there are columns on both sides of the wooden beam, and complicates the overall construction management and operation of the frame.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a joint structure between a pillar and a wooden beam that has high strength and allows easy construction of the wooden beam. [Means for solving the problem]

[0006] The present invention, for achieving the aforementioned objective, is a joint structure for a column and a wooden beam, wherein the wooden beam is formed by stacking a pair of beam members in the beam width direction such that their opposing sides, which are the sides of the beam members in the beam axis direction, face each other, and a steel plate protruding outward from the column is inserted into a slit at the column-side end of the wooden beam, the slit being formed by notches provided on each of the opposing surfaces of the pair of beam members, and the steel plate and the slit being provided in an upper and lower pair.

[0007] In this invention, a steel plate protruding outward from the column is inserted into the timber beam, and by using this steel plate to join the column and the timber beam, a higher load-bearing capacity can be secured than when a rod-shaped member is used. A pair of steel plates are provided, one above the other, and they mainly bear tensile forces against normal long-term loads and short-term loads such as those during earthquakes. Furthermore, by stacking a pair of beam members in the beam width direction, the timber beam can be easily constructed by moving the beam members in the beam width direction, improving constructability compared to when the timber beam is moved in the beam axis direction.

[0008] The steel plates are preferably arranged with their plate surfaces in a horizontal direction. This allows a pair of upper and lower steel plates to be placed with ample space even if the beam depth is not large.

[0009] Preferably, the column is formed using concrete, a portion of the steel plate is embedded in the concrete of the column, and a hole is provided in that portion for filling with concrete. This allows the tensile force generated in the steel plate to be transmitted to the column via the shear resistance of the concrete filled in the hole.

[0010] The steel plate may be constricted at the boundary between the pillar and the wooden beam. This allows the steel plate to plasticize first when the wooden beam is bent, preventing damage to other parts.

[0011] It is desirable to further include a fixing mechanism that fixes the pair of beams together at positions different from the steel plates and integrates the pair of beams. This prevents lateral buckling of the wooden beam.

[0012] The pillar may be formed using a wooden material, and the steel plate may be joined to a base plate fixed to a side surface of the pillar facing the wooden beam. This allows the steel plate to be fixed to the wooden post without being inserted into the wooden post when joining the wooden post and the wooden beam. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a joint structure between a pillar and a wooden beam that has high strength and allows easy construction of the wooden beam. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a diagram showing a joint structure 10. FIG. [Figure 2] 1 is a diagram showing a cross section perpendicular to the beam axis direction of a wooden beam 1. FIG. [Figure 3] Diagram showing screw 7. [Figure 4] 1A to 1C are diagrams illustrating a method for constructing the joint structure 10. [Figure 5] A diagram showing a modified example of steel plate 4. [Figure 6] A diagram showing the stud 44. [Figure 7] FIG. 10 is a diagram showing an example in which the steel plate 4 is arranged vertically. [Figure 8] A diagram showing bolt 27. [Figure 9] A diagram showing columns 3a and 3b. [Figure 10] A diagram showing column 3c. [Figure 11] FIG. 10 is a diagram showing an example in which a steel plate 4a is fixed to a base plate 8 on the side of a pillar 3c. [Figure 12] A diagram showing an example of the arrangement of steel plates 4. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0016] (1.Joint structure 10) Figure 1 shows a joint structure 10 according to an embodiment of the present invention. The joint structure 10 connects a wooden beam 1 and a column 3. Figure 1(a) shows a vertical cross-section of the joint structure 10, and Figure 1(b) shows a horizontal cross-section of the joint structure 10. Figure 1(a) is a cross-section along line BB in Figure 1(b), and Figure 1(b) is a cross-section along line AA in Figure 1(a).

[0017] A timber beam 1 is constructed by stacking a pair of timber beams 2 in the beam width direction so that their opposing sides, which are the sides in the beam axis direction, face each other. The timber material is laminated timber or the like, with the fiber direction oriented in the beam axis direction, but is not limited to this. For example, other timber materials such as CLT (Cross Laminated Timber) and LVL (Laminated Veneer Lumber), with the fiber direction oriented in the beam axis direction or the beam depth direction, may also be used. The beam axis direction corresponds to the left-right direction in Figures 1(a) and (b), and the beam depth direction corresponds to the up-down direction in Figure 1(a) and the direction normal to the paper in Figure 1(b).

[0018] The column 3 is a reinforced concrete (RC) member. In this embodiment, the column 3 is a precast member including a steel plate 4 and a shear resistance plate 6, which will be described later. However, the column 3 may also be constructed of cast-in-place concrete.

[0019] The joint structure 10 of this embodiment involves inserting a steel plate 4, which protrudes outward from the column 3, into a slit 11 at the column 3-side end of the wooden beam 1. The slit 11 is formed by a combination of notches 21 provided on the opposing surfaces of both beam members 2. A pair of steel plates 4 are provided, one above the other, and correspondingly, a pair of slits 11 are also provided, one above the other.

[0020] The steel plate 4 is positioned with its surface horizontal (sometimes referred to as "horizontal arrangement"), penetrating the column 3 and protruding from both the left and right sides of the column 3. The middle portion of the steel plate 4, which is part of its longitudinal direction, is embedded in the concrete of the column 3, and both ends of the steel plate 4 in the longitudinal direction are inserted into the slits 11 of the left and right wooden beams 1. The steel plate 4 is fixed to the wooden beams 1 by filling the slits 11 with a filler material 5. The filler material 5 can be an adhesive such as epoxy resin, but is not limited to this. The insertion length of the steel plate 4 into the wooden beams 1 is determined considering the yield strength of the steel plate 4, and is, for example, about 500 mm. The distance from the top or bottom surface of the wooden beams 1 to the center of the steel plate 4 is, for example, about 100 mm. However, this distance and the insertion length are not particularly limited.

[0021] In the joint structure 10, the upper steel plate 4 bears the tensile force against the bending of the timber beam 1 due to normal long-term loads. The lower steel plate 4 bears the compressive force, but most of the compressive force is supported by the bearing pressure (surface pressure) on the timber beam 1 from the side of the column 3. On the other hand, under short-term loads such as during an earthquake, bending in the opposite direction to the bending due to long-term loads may occur in the timber beam 1, in which case the lower steel plate 4 bears the tensile force.

[0022] Holes 41 and 42 are provided in the steel plate 4. Hole 41 is formed in the portion of the steel plate 4 that is to be embedded in the pillar 3, and hole 42 is formed in the portion of the steel plate 4 that is to be inserted into the wooden beam 1.

[0023] The holes 41 in the steel plate 4 function as dowel holes when filled with concrete from the column 3. The dimensions and number of the holes 41 are designed so that the dowel strength is greater than the tensile strength of the steel plate 4.

[0024] On the other hand, the holes 42 of the steel plate 4 are filled with the filler 5, which improves the fixation of the steel plate 4 due to adhesion between the steel plate 4 and the filler 5. The steel plate 4 may be subjected to a surface treatment such as forming irregularities to further improve adhesion performance with the filler 5.

[0025] In the joint structure 10, the steel plate 4 mainly bears the tensile force when the wooden beam 1 bends, and this tensile force is transmitted to the column 3 via the horizontal shear resistance of the concrete in the holes 41 of the steel plate 4. In this embodiment, the main reinforcements 31 of the column 3 are passed through some of the holes 41, and by generating shear resistance from the main reinforcements 31, a greater tensile force can be borne. However, it is also possible to arrange the main reinforcements 31 of the column 3 without passing them through the holes 41.

[0026] In addition to the steel plate 4, the column 3 is also provided with a shear resistance plate 6. The shear resistance plate 6 functions as a shear force transmission means for transmitting vertical shear force between the wooden beam 1 and the column 3.

[0027] The shear resistance plate 6 is a substantially rectangular plate material made of steel or the like, and is placed between the upper and lower steel plates 4 so that the plate surface is vertical. A portion of the shear resistance plate 6 is embedded in the concrete of the column 3, and the remaining portion protrudes outward from the column 3 and is inserted into the slit 12 in the wooden beam 1. The slit 12 is formed by a combination of notches 22 provided on the opposing surfaces of both beam materials 2, similar to the slit 11 described above.

[0028] A hole 61 is provided in the shear resistance plate 6 where it is embedded in the pillar 3, and this hole 61 is filled with the concrete of the pillar 3, similar to the hole 41. On the other hand, a hole 62 is provided in the shear resistance plate 6 where it is inserted into the wooden beam 1, for passing a drift pin 23 through.

[0029] Figure 2 is a diagram showing a cross section perpendicular to the beam axis direction of the wooden beam 1, taken along line CC in Figure 1(a). Drift pins 23 are passed through holes 62 in the shear resistance plate 6 and through holes 24 in the beam width direction of the beam material 2 on both sides of the shear resistance plate 6, and are positioned so as to penetrate the wooden beam 1 in the beam width direction. The beam width direction is a direction perpendicular to the beam axis direction and the beam depth direction, and corresponds to the left-right direction in Figure 2.

[0030] These beams 2 are fixed and integrated by a fixing mechanism at the intermediate portion between both ends of the wooden beam 1 in the beam axis direction. Figure 3 shows a horizontal cross section of an example in which screws (long screws) 7 are used as the fixing mechanism. In the example of Figure 3, both beams 2 are fixed by driving screws 7 from each beam 2 side into the beam 2 on the opposite side. Multiple screws 7 are provided at intervals in the beam axis direction. Note that screws 7 are not provided at the ends of the wooden beam 1 in the beam axis direction where the steel plates 4 and shear resistance plates 6 are inserted.

[0031] Other fixing mechanisms include driving lag screw bolts from each beam 2 into the beam 2 on the opposite side, or using a GIR method in which a steel rod protruding from each beam 2 is inserted into a hole in the beam 2 on the opposite side and the hole is filled with a filler such as adhesive. The two beams 2 can also be fastened together by tightening a nut onto a bolt that penetrates both beams 2 in the beam width direction. Alternatively, the two beams 2 can be glued together using adhesive or the like. By using these fixing mechanisms to fix and integrate the beams 2 together, lateral buckling of the wooden beam 1 can be prevented.

[0032] (2. Method for constructing the joint structure 10) When constructing the joint structure 10, first, a column 3, which is a precast member having a steel plate 4 and a shear resistance plate 6, is installed. Then, as shown in Fig. 4(a) in a cross section similar to Fig. 2, a pair of beam members 2 are moved (swept) from both sides of the steel plate 4 in the beam width direction toward the steel plate 4 as indicated by arrow a, and positioned so that the opposing surfaces abut against each other.

[0033] At this time, as shown in Figure 4(b), the notches 21 and 22 of both beam members 2 are combined to form the slits 11 and 12, and the steel plates 4 and shear resistance plates 6 are inserted into the slits 11 and 12. Subsequently, as shown in Figure 3, the beam members 2 are fixed together with screws 7, the drift pins 23 are installed, and the filler material 5 is injected into the slit 11 from the injection hole 25 (see Figure 1(b)) provided in one of the beam members 2. This completes the construction of the wooden beam 1 and constructs the joint structure 10. Confirmation of the filling of the filler material 5 is made by visually observing that the filler material 5 flows out to the outside from the discharge hole 26 (see Figure 1(b)) provided in the other beam member 2.

[0034] In the example shown in Figure 1, the end of the wooden beam 1 in the direction of the beam axis is in contact with the column 3. However, in practice, considering the ease of fitting the beam material 2, it is desirable to leave a gap of up to 30 mm between the wooden beam 1 and the column 3. In this case, after the wooden beam 1 is installed, a filler material (not shown) is filled between the wooden beam 1 and the column 3. As the filler material, a cement-based solidifying material such as non-shrink mortar can be used.

[0035] As described above, the joint structure 10 of this embodiment is configured such that a steel plate 4 protruding outward from the column 3 is inserted into the wooden beam 1, and this steel plate 4 is used to join the column 3 and the wooden beam 1. By using a steel plate 4, which has a larger cross-sectional area than rod-shaped members such as reinforcing bars, high load-bearing capacity can be ensured. A pair of steel plates 4 are provided, one above the other, and they mainly bear tensile forces against long-term loads under normal conditions and short-term loads such as those during earthquakes. Furthermore, the wooden beam 1 is constructed by stacking a pair of beam members 2 in the beam width direction, allowing the wooden beam 1 to be easily constructed by moving the beam members 2 in the beam width direction, improving constructability compared to the case where the wooden beam 1 is moved in the beam axis direction.

[0036] In this embodiment, the steel plates 4 are arranged horizontally, so that even if the wooden beam 1 does not have a large beam depth, the pair of upper and lower steel plates 4 can be arranged with ample space.

[0037] In addition, in this embodiment, by filling the holes 41 in the steel plate 4 with concrete from the pillar 3, the tensile force generated in the steel plate 4 can be transmitted to the pillar 3 via the shear resistance of the concrete filled in the holes 41.

[0038] However, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, a shear resistance plate 6 is provided as a shear force transmission means for transmitting vertical shear forces between the wooden beam 1 and the column 3. Alternatively, a concrete cotter (protrusion) may be protruded from the column 3 and inserted into a recess (not shown) provided at the end of the wooden beam 1 facing the column 3. The recess can be formed by combining notches on the opposing surfaces of both beams 2, similar to the slit 12 described above. Alternatively, if sufficient shear force can be transmitted by the frictional force generated between the wooden beam 1 and the column 3 or the steel plate 4 described above, the shear force transmission means may be omitted.

[0039] Furthermore, as shown in Figure 5(a) in a cross section similar to Figure 1(b), constrictions 43 may be provided on both sides of the width of the steel plate 4 at the boundary between the wooden beam 1 and the column 3 to reduce the cross-sectional area of ​​the steel plate 4. By constricting the steel plate 4 in this manner, the steel plate 4 is plasticized prior to bending of the wooden beam 1, preventing damage to other parts. In the example of Figure 5(a), the constrictions 43 are arc-shaped, which prevents excessive stress concentration. However, the constrictions 43 may also be rectangular. In the example of Figure 5(a), the constrictions 43 are provided on the wooden beam 1 side of the contact surface between the wooden beam 1 and the column 3, but they can also be provided on the column 3 side.

[0040] Furthermore, the holes 42 in the steel plate 4 may be elongated holes extending along the longitudinal direction of the steel plate 4, and the elongated holes may be extended further to the ends of the steel plate 4, making the ends of the steel plate 4 fork-shaped (comb-shaped) as shown in Fig. 5(b). This improves the adhesion between the steel plate 4 and the filler 5.

[0041] Furthermore, the end of the steel plate 4 may be tapered as shown in Figure 5(c), and it may be advantageous in design that the stress transmission effect of the steel plate 4 gradually decreases toward the end of the steel plate 4. Furthermore, when the filler 5 is injected into the slit 11, the flow of the filler 5 becomes smoother, making it less likely that small cavities will be generated, and facilitating quality control.

[0042] In this embodiment, the tensile force of the steel plate 4 is transmitted to the column 3 by the shear resistance of the concrete in the holes 41 of the steel plate 4. Alternatively, as shown in FIG. 6, headed studs 44 may be provided at the portion of the steel plate 4 embedded in the column 3, and the tensile force of the steel plate 4 may be transmitted to the column 3 by the shear resistance of the studs 44. Alternatively, steel rods such as reinforcing bars may be arranged along the width direction of the steel plate 4 and fixed to the steel plate 4 by welding or the like to serve as shear resistance elements. The studs 44 and the above-mentioned steel rods may be provided on either the top or bottom surface of the steel plate 4, or on both the top and bottom surfaces.

[0043] Furthermore, although the steel plates 4 are arranged horizontally in this embodiment, they may also be arranged with the plate surfaces of the steel plates 4 oriented vertically (sometimes referred to as "vertical arrangement"), as shown in cross sections similar to those in FIGS. 1(a) and 1(b) in FIGS. 7(a) and 7(b). In this case, too, the slits 11 in the wooden beam 1 into which the steel plates 4 are inserted can be formed by notches 21 in the opposing surfaces of both beams 2. Alternatively, notches 21 may be provided in the opposing surface of only one of the beams 2, and this may be used as the slits 11. Because the steel plates 4 also function as a means for transmitting shear force in the vertical direction, the shear resistance plates 6 described above can be omitted.

[0044] In the example of Figure 7(a), the upper part of the upper steel plate 4 that is inserted into the wooden beam 1 protrudes from the top surface of the wooden beam 1, and this upper part is embedded in the concrete 20 of the slab that is placed on top of the wooden beam 1, thereby integrating the wooden beam 1 and the slab. The upper hole 42 is filled with the concrete 20 of the slab, and the lower hole 42 placed in the slit 11 is filled with filler material 5.

[0045] In the example of FIG. 7(a), the two beams 2 integrated with a fixing mechanism such as screws 7 function as a buckling stiffener for the steel plate 4, and can prevent the steel plate 4 from buckling due to compression.

[0046] On the other hand, when the steel plates 4 are arranged horizontally as described above, buckling due to compression can be suppressed by providing plate-shaped ribs perpendicular to the plate surface of the steel plate 4 along the longitudinal direction of the steel plate 4 and giving the steel plate 4 a T-shaped cross section. The ribs may be provided on either the top or bottom surface of the steel plate 4. Alternatively, the ends of the H-shaped steel protruding from the column 3 can be inserted into slits in the wooden beam 1. In this case, the flanges of the H-shaped steel are arranged horizontally and treated as the upper and lower steel plates 4. The webs of the H-shaped steel can be used as the shear resistance plates 6 described above.

[0047] Furthermore, to integrate the wooden beam 1 with the slab, the lower part of a bolt (lag screw bolt) 27 may be driven into the top surface of the wooden beam 1, and the upper part of the bolt 27 protruding from the top surface may be embedded in the concrete 20 of the slab, as shown in Figure 8. By driving the bolt 27 into a horizontal position near the steel plate 4 so that it reaches below the steel plate 4, the bolt also functions as a buckling stiffener when the steel plate 4 is compressed.

[0048] In this embodiment, the column 3 is made of reinforced concrete, but the structural form of the column 3 is not limited to this. For example, it may be a composite structural column in which concrete is poured inside a buried formwork made of wooden boards. Furthermore, as shown in FIG. 9(a), the column 3a may be made of steel (S) structure using steel pipe columns. In this case, the steel plate 4a does not penetrate the column 3a, but is fixed to the outside of a diaphragm (through diaphragm) 32 by welding or the like, so that it protrudes outward from the column 3a. The tensile force generated in the steel plate 4a is transmitted to the column 3a via the diaphragm 32.

[0049] Column 3b in Figure 9(b) is made of SRC (steel-reinforced concrete), and in this case too, steel plate 4a does not penetrate column 3b. Steel plate 4a is fixed by welding or other means to flange 33 of the H-shaped steel, which is the built-in steel frame. Reference numeral 34 denotes concrete, which is installed so as to wrap around the H-shaped steel. Reference numeral 35 denotes a rib plate, which is fixed between flanges 33 at a height corresponding to steel plate 4a and functions as a reinforcement for the H-shaped steel. When further joining wooden beams 1 in the direction normal to the page in Figure 9(b), steel plate 4a fixed to rib plate 35 by welding or other means can be used to join column 3c and wooden beam 1.

[0050] The columns can also be made of wood (wooden columns). Figures 10(a) and (b) show an example of a wooden column 3c, with a cross section similar to that of Figures 1(a) and (b). In this example, slits 36 are provided in the column 3c to allow the steel plates 4 to pass through. The slits 36 communicate with slits 11 in the wooden beams 1 on both sides of the column 3c, and are filled with a filler material 9 made of an adhesive such as epoxy resin. The steel plates 4 are passed through the slits 36 in the column 3c and are fixed to the column 3c by adhesion to the filler material 9. The holes 41 in the steel plates 4 are filled with the filler material 9. The tensile force generated in the steel plates 4 due to bending of the wooden beam 1 is transmitted to the column 3c via adhesion of the steel plates 4 to the filler material 9.

[0051] In this example, the upper and lower columns 3c are joined using the GIR method. That is, vertical reinforcing bars 38 protruding from the top of the lower column 3c are inserted into holes (not shown) in the upper column 3c, and the holes are filled with a filler material such as adhesive. As shown in FIG. 10(b), some of the reinforcing bars 38 are passed through holes 41 in the steel plate 4. By passing the reinforcing bars 38 through the holes 41 in the steel plate 4, the shear resistance of the reinforcing bars 38 also contributes to the transmission of the tensile force described above. The column 3c is erected at the construction site with the steel plate 4 fixed in place by the filler material 9.

[0052] In the example of Figure 10, the steel plate 4 penetrates the column 3c, but as shown in the vertical cross section of the column 3c near the side surface facing the wooden beam 1 in Figure 11, the steel plate 4a may be fixed by welding or the like to the base plate 8 on the side surface of the column 3c facing the wooden beam 1, so that it does not penetrate the column 3c. This can prevent cross-sectional loss of the column 3c.

[0053] The base plate 8 is fixed to the side of the column 3c with lag screw bolts 81. The tensile force generated in the steel plate 4a is transmitted to the column 3c via the base plate 8 (and lag screw bolts 81). The base plate 8 also serves to prevent the steel plate 4a from sinking into the column 3c when the wooden beam 1 is bent.

[0054] In the above example, wooden beams 1 are joined to both the left and right sides of the column, but as shown in Fig. 12(a) with a cross section similar to Fig. 1(b), the joint structure 10 in Fig. 1 can also be applied when wooden beams 1 are joined to only one side of column 3. In the example in Fig. 12(a), one end of steel plate 4 is embedded in column 3 up to about two-thirds of the column depth, and the other end protrudes outward from column 3 and is inserted into slit 11 in wooden beam 1.

[0055] 12(b) shows an example in which a wooden beam 1 is joined to the four side surfaces of a pillar 3, and steel plates 4 are used that are joined in a cross shape by welding or the like. The steel plates 4 protrude from each of the four side surfaces of the pillar 3 and are inserted into slits 11 in the wooden beam 1.

[0056] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the technical ideas disclosed in this application, and it is understood that these modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0057] 1: Wooden beam 2: Beam material 3, 3a, 3b, 3c: Pillar 4, 4a: Steel plate 5: Filling material 6: Shear resistance plate 7: Bis 8: Base plate 10:Joint structure 11, 12: Slit 21, 22: Notch 41, 42, 61, 62: Hole

Claims

1. A joint structure of a pillar and a wooden beam, The wooden beam is formed by stacking a pair of beam materials in the beam width direction so that opposing surfaces, which are side surfaces in the beam axis direction of the beam materials, face each other, The steel plate protruding outward from the column is inserted into the slit at the end of the wooden beam on the column side, The slits are formed by notches provided on each of the opposing surfaces of the pair of beam members, A joining structure characterized in that the steel plate and the slit are provided in pairs, one above the other.

2. 2. The joint structure according to claim 1, wherein the steel plates are arranged with their plate surfaces in a horizontal direction.

3. the pillars are formed using concrete; A portion of the steel plate is embedded in the concrete of the pillar, 2. The joint structure according to claim 1, wherein a hole into which the concrete is filled is provided in the part.

4. 2. The joint structure according to claim 1, wherein the steel plate is constricted at the boundary between the pillar and the wooden beam.

5. 2. The joint structure according to claim 1, further comprising a fixing mechanism that fixes the pair of beams together and integrates the pair of beams.

6. The pillar is formed using wood material, 2. The joint structure according to claim 1, wherein the steel plate is joined to a base plate fixed to the side of the pillar facing the wooden beam.

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