Joint structure

Abstract

This provides a suitable joining structure for a frame in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of columns. [Solution] The joint structure 100 is a column-beam joint structure between a wooden column 10 and a wooden beam 12, and includes a horizontal force transmission section 30 that transmits horizontal forces acting on the wooden beam 12 to the wooden column 10, and a shear force transmission section 34 provided separately from the horizontal force transmission section 30 that transmits shear forces acting on the wooden beam 12 to the wooden column 10.

Description

Technical Field

[0001] The present invention relates to a joining structure of wooden beams.

Background Art

[0002] Patent Document 1 discloses a configuration in which a wooden beam is pin-joined to a column.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The pin-joining structure described in Patent Document 1 is a joining structure generally used in a wooden column-beam structure. However, in the case where a horizontal force such as an earthquake force or a wind load acts on the structure, the pin-joining structure as described in Patent Document 1 is likely to cause a relatively large deformation due to the axial force (tensile force and compressive force) of the beam. For this reason, for example, in a structure in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of wooden columns, it is not suitable as a joining structure used in a structure where the tensile force and compressive force in the axial direction of the wooden beam are relatively large.

[0005] An object of the present invention is to provide a joining structure suitable for a structure in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of columns at least one of which is a wooden column.

Means for Solving the Problems

[0006] The present invention relates to a frame joint structure in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of columns, at least one of which is a wooden column, and comprises a horizontal force transmission section that transmits horizontal forces acting on the wooden beam to the wooden column, and a shear force transmission section provided separately from the horizontal force transmission section that transmits shear forces acting on the wooden beam to the wooden column. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a suitable joint structure for a frame in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of columns, at least one of which is a wooden column. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing an example of a column-beam frame to which the joint structure according to an embodiment of the present invention is applied. [Figure 2] This is a cross-sectional view showing a section along line AA in Figure 1, illustrating the connection structure between the wooden beam and the auxiliary beam using connecting members. [Figure 3] This figure shows another example of a connection structure between a wooden beam and an auxiliary beam using connecting members, and is a cross-section corresponding to Figure 2. [Figure 4] This figure illustrates the axial force acting on a timber beam in a column-beam frame to which the joint structure according to an embodiment of the present invention is applied. [Figure 5] This is a cross-sectional view showing a cross-section along line BB in Figure 1, and is a diagram illustrating a joint structure (joining structure between a wooden beam and a wooden column) according to the first embodiment of the present invention. [Figure 6] This is a cross-sectional view showing the section along the DD line in Figure 5. [Figure 7] This is a cross-sectional view showing a section along the EE line in Figure 6. [Figure 8] This is a cross-sectional view showing the cross-section along line CC in Figure 1, illustrating the connection structure between the auxiliary beam and the timber column. [Figure 9] This is a cross-sectional view showing the cross-section along the FF line in Figure 8. [Figure 10] This is a cross-sectional view showing a joint structure according to a second embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 6. [Figure 11] This is a cross-sectional view showing the cross-section along the GG line in Figure 10. [Figure 12] This is a cross-sectional view showing a joint structure according to the third embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 6. [Figure 13] This is a cross-sectional view showing a modified example of the joint structure according to the third embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 6. [Figure 14] This is a diagram illustrating the connection structure between columns other than wooden columns. [Figure 15] This is a cross-sectional view showing a first modified example of the joint structure according to each embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 5. [Figure 16] This is a cross-sectional view showing a second modified example of the joining structure according to each embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 5. [Figure 17] This is a cross-sectional view showing a third modified example of the joining structure according to each embodiment of the present invention, and is a diagram showing the cross-section corresponding to Figure 6. [Modes for carrying out the invention]

[0009] The following describes a joint structure according to an embodiment of the present invention with reference to the drawings.

[0010] <First Embodiment> Referring to Figures 1 to 9, a joint structure 100 according to the first embodiment of the present invention will be described. The joint structure 100 is a column-beam joint structure that joins a column 10, which is a wooden column, and a wooden beam 12, which is connected to the wooden beam 12 via a connecting member 20, in a column-beam frame 4, as shown in Figure 1, in which a wooden beam 12 and an auxiliary beam 14 connected to the wooden beam 12 are spanned between a pair of columns 10, at least one of which is a wooden column.

[0011] The column-beam structure 4 to which the joining structure 100 is applied is, for example, a seismic isolation structure that improves the seismic resistance of a building including at least a part of a structure having a wooden beam 12. As shown in FIG. 1, it includes a pair of columns 10 erected in the vertical direction, a wooden beam 接合構造100が適用される柱梁架構4は、例えば、木質梁12を有する架構を少なくとも一部分に含む建物の耐震性を向上させる制震架構であり、図1に示されるように、鉛直方向に立設された一対の柱10と、一対の柱10に対して接合される木質梁12と、木質梁12よりも下方において、一対の柱10に対して接合される補助梁14と、木質梁12と補助梁14とを連結する連結部材20と、を備える。

[0012] Note that the column-beam structure 4 to which the joining structure 100 is applied is not limited to a seismic isolation structure, and any structure may be used as long as it has a wooden beam 12 and an auxiliary beam 14 connected to the wooden beam 12 via a connecting member 20. Also, at least one of the pair of columns 10 may be a wooden column, and the other column may be of a steel frame, reinforced concrete, or steel-reinforced concrete structure. However, hereinafter, the case where both of the pair of columns 10 are wooden columns will be described.

[0013] FIG. 1 shows an example in which a column-beam structure 4 having wooden beams 12 and auxiliary beams 14 is used in a plurality of floors of a building. The pair of columns 10 are erected on the foundation part 1 in the first-floor part, and concrete is placed on the wooden beam 12 whose both ends are joined to the pair of columns 10 through a deck plate or the like (not shown), thereby constructing a slab 2. Note that the column-beam structure 4 to which the joining structure 100 is applied may be applied only to some floors (for example, only the lowest floor) of the plurality of floors, or may be applied only to the upper floors when the lower floors are buildings of, for example, a steel frame, reinforced concrete, or steel-reinforced concrete structure. Also, the column-beam structure 4 to which the joining structure 100 is applied may be an outer peripheral structure arranged along the outer periphery of the building, or may be an internal structure arranged inside the building. Further, in the construction of the slab 2, a conventional formwork or a half PCa may be used instead of the deck plate.

[0014] The wooden column 10, that is, the column 10 which is joined to the wooden beam 12 by the joint structure 100 described later, is a square timber formed from solid wood or laminated timber, and as shown in Figure 5 described later, it has a core material 10a that functions as a load-bearing part, a fire-stopping layer 10b provided so as to cover the core material 10a, and a fire-resistant layer 10c such as a decorative material placed on the surface.

[0015] The wooden beam 12, which spans between a pair of columns 10, is a square timber formed from solid wood or laminated timber, similar to the wooden columns 10, and as shown in Figure 5 described later, it has a core material 12a that functions as a load-bearing part, a fire-stopping layer 12b provided to cover the core material 12a, and a fire-resistant layer 12c of decorative material or the like placed on the surface.

[0016] The auxiliary beams 14 spanning between the pair of columns 10 are square timbers formed from solid wood or laminated timber. No special fire-resistant treatment is required on their surface, but if necessary, they may be treated with flame retardant (or non-combustible) treatment or covered with a flame retardant (or non-combustible) decorative material. The auxiliary beams 14 are not limited to those primarily made of wood; for example, they may be steel beams such as H-shaped steel or precast reinforced concrete members, or composite structural beams whose surfaces are covered with wood panels or the like.

[0017] The connection structure 100 between the column 10 and the timber beam 12, and the connection structure 101 between the column 10 and the auxiliary beam 14 will be described in detail later.

[0018] The connecting member 20 that connects the wooden beam 12 and the auxiliary beam 14 is, for example, a metal steel damper as shown in Figures 1 and 2, having a plurality of damping sections 22 having small cross-sectional sections 22a, a first mounting section 24 for attaching the damping sections 22 to the wooden beam 12, and a second mounting section 26 for attaching the damping sections 22 to the auxiliary beam 14. It functions as a damping member that utilizes the elastoplastic properties of steel to absorb energy through deformation and dampen the horizontal force acting on the pair of columns 10. Note that the connecting member 20 is not limited to being provided with the intention of damping horizontal forces, but may simply be a member of steel or the like that is provided to connect the wooden beam 12 and the auxiliary beam 14.

[0019] As shown in Figure 2, for example, the connecting member 20 is fixed to the wooden beam 12 via the first mounting portion 24 by fastening members such as screws, while it is fixed to the auxiliary beam 14 via the second mounting portion 26 by adhesive 28 filled in the groove 14a formed in the auxiliary beam 14. In this way, the wooden beam 12 and the auxiliary beam 14 are connected by the connecting member 20.

[0020] As shown in Figure 3, the connecting member 120 may have a plurality of damping sections 122 having small cross-sectional sections 122a, a first mounting section 124 for attaching the damping sections 122 to the wooden beam 12, and a second mounting section 126 for attaching the damping sections 122 to the auxiliary beam 14, and may be fixed to the wooden beam 12 via the first mounting section 124 with fastening members such as screws, and fixed to the auxiliary beam 14 via the second mounting section 126 with fastening members such as screws.

[0021] The method for connecting the connecting member 20 to the wooden beam 12 and the auxiliary beam 14 is not limited to the method described above. Any method is acceptable as long as it allows the connecting member 20 to be connected to the wooden beam 12 and the auxiliary beam 14. For example, if the auxiliary beam 14 is a steel beam, it may be connected by fastening members such as bolts.

[0022] When a horizontal force such as seismic force or wind load acts on a building having the column-beam frame 4 configured in this way, and a pair of columns 10 tilt, a horizontal displacement difference D1 (relative displacement difference) occurs between the wooden beam 12 and the auxiliary beam 14 in accordance with the tilt of the pair of columns 10, as shown in Figure 4.

[0023] Then, in accordance with the displacement difference D1 that occurs between the wooden beam 12 and the auxiliary beam 14, an inversely symmetrical bending moment acts on the damping portion 22 of the connecting member 20 positioned between the wooden beam 12 and the auxiliary beam 14, causing the upper and lower ends of the damping portion 22 to plastically deform.

[0024] As the connecting member 20 deforms in this way, the energy of the horizontal force is absorbed by the connecting member 20, and the horizontal force acting on the pair of columns 10 is attenuated, thereby suppressing the shaking of the entire building caused by earthquakes and other events.

[0025] In a typical frame structure without auxiliary beams 14 connected to the wooden beams 12 via connecting members 20, when a horizontal force acts on the building and the pair of columns 10 tilt, a rotational force acts on the joint between the wooden beams 12 and the columns 10. In contrast, in the column-beam frame structure 4 with the above configuration, which has wooden beams 12 and auxiliary beams 14 connected via connecting members 20, the rotational force acting on the joint between the wooden beams 12 and the columns 10, that is, the force that causes the wooden beams 12 to rotate in the vertical plane, is converted into an axial force in the material axis direction of the wooden beams 12 by the connecting members 20 and the auxiliary beams 14.

[0026] In other words, in the column-beam frame 4 with the above configuration, the tensile and compressive forces in the axial direction of the timber beam 12 are relatively large. Therefore, if the joint structure between the timber beam 12 and the column 10 is a pin joint structure, which is commonly used in wooden column-beam frames, there is a risk that relatively large deformations or damage may occur between the timber beam 12 and the column 10.

[0027] Furthermore, unlike the auxiliary beam 14, the wooden beam 12 is a member that is subjected to long-term loads. Therefore, the joint structure between the wooden beam 12 and the column 10 must adequately resist not only axial forces such as tensile and compressive forces acting in the direction of the wooden beam 12's axis, but also shear forces.

[0028] Therefore, in this embodiment, the joint structure 100 between the column 10 and the wooden beam 12 is configured, for example as shown in Figures 5 and 6, to include a horizontal force transmission unit 30 that transmits the horizontal force acting on the wooden beam 12 to the wooden column, which is the column 10, and a shear force transmission unit 34 that is provided separately from the horizontal force transmission unit 30 and transmits the shear force acting on the wooden beam 12 to the column 10.

[0029] Next, with reference to Figures 5 to 7, the joint structure 100 between the column 10 and the timber beam 12 will be described.

[0030] The joint structure 100 includes a horizontal force transmission section 30 that transmits the horizontal force acting on the wooden beam 12 to the wooden column 10, and a shear force transmission section 34 that transmits the shear force acting on the wooden beam 12 to the wooden column 10.

[0031] The horizontal force transmission section 30 includes a rod-shaped horizontal force transmission member 31 arranged along the material axis direction of the wooden beam 12 to connect the column 10 and the wooden beam 12, and an adhesive (not shown) such as epoxy resin to bond the horizontal force transmission member 31 to the column 10 and the wooden beam 12, thereby creating a structure that firmly joins the wooden beam 12 to the column 10 in its material axis direction.

[0032] The horizontal force transmission member 31 is, for example, a steel bar with a roughly circular cross-section and an uneven surface, such as a deformed reinforcing bar or a threaded reinforcing bar. The column 10 has an insertion hole 10d that penetrates horizontally through which the horizontal force transmission member 31 is inserted, and the end face of the wooden beam 12 has an insertion hole 12d, which is a non-penetrating hole into which the end of the horizontal force transmission member 31 is inserted. Here, the diagram shows an internal frame structure in which wooden beams 12 are joined to both sides of the column 10. However, if the column 10 is provided on the outer perimeter or at a corner, the wooden beam 12 is joined to only one side. In that case, the horizontal force transmission member 31 does not penetrate the column 10 but stops inside the column 10, and accordingly, the insertion hole 10d formed in the column 10 may become a non-penetrating hole.

[0033] Figures 5 and 6 show an example in which the horizontal force transmission members 31 are arranged in two rows along the beam width direction and in three rows along the beam depth direction. The number and arrangement of the horizontal force transmission members 31 are not limited to this. For example, the number of horizontal force transmission members 31 may be fewer if it is possible to firmly join the wooden beam 12 and the column 10, but it is desirable to have at least one, preferably two or more.

[0034] Furthermore, the wooden beam 12 has connecting holes 12e, which are used when filling the insertion holes 10d and 12d with adhesive, formed along the beam width direction (approximately horizontal direction) so as to communicate with the bottom of the insertion holes 12d, that is, near the end of the insertion holes 12d. Note that the connecting holes 12e do not necessarily have to be formed along the beam width direction (approximately horizontal direction), but may be formed at an angle upward or approximately vertically.

[0035] As shown in Figures 5 and 6, when two wooden beams 12 are connected with a column 10 in between, the communication hole 12e formed in one wooden beam 12 becomes the adhesive injection hole, and the communication hole 12e formed in the other wooden beam 12 becomes the adhesive discharge hole. By visually confirming the discharge of adhesive from the communication hole 12e, it is possible to determine whether the insertion holes 10d and 12d have been filled with adhesive. Once it is confirmed that the insertion holes 10d and 12d have been filled with adhesive, each communication hole 12e is sealed with, for example, a wood-grain patterned plug (not shown).

[0036] Furthermore, if only one wooden beam 12 is connected to the column 10, the through-hole 10d formed in the column 10 is made a non-through hole, and a communication hole is formed in the column 10 for use when filling with adhesive. This makes it possible to determine whether or not the through-holes 10d and 12d have been filled with adhesive, even in this case.

[0037] In order to absorb construction errors, such as positional misalignment or dimensional errors of the column 10 and the wooden beam 12, when connecting the column 10 and the wooden beam 12 via members such as the horizontal force transmission member 31, the joint structure 100 provides a predetermined column-beam clearance C1 between the column 10 and the wooden beam 12 connected via the horizontal force transmission member 31, as shown in Figures 5 and 6.

[0038] On the other hand, if there is a gap between the column 10 and the wooden beam 12, the adhesive filled in the insertion holes 10d and 12d may leak out to the outside through the gap. Therefore, the joint structure 100 is equipped with a leak prevention member 16 to prevent the adhesive from leaking out to the outside through the column-beam clearance C1.

[0039] The leak-preventing member 16 is made of closed-cell foamed rubber or foamed resin and is attached to the column 10 or wooden beam 12 so as to surround the opening of the insertion hole 10d or insertion hole 12d. When the column 10 and the wooden beam 12 are joined, the wooden beam 12 is pressed against the column 10, so that the leak-preventing member 16 is compressed by the column 10 and the wooden beam 12, that is, it is in a state where it can prevent adhesive from leaking out of the insertion holes 10d and 12d.

[0040] The leak-preventing member 16 may be a liquid caulking material such as silicone sealant, in which case the leak-preventing member 16 is applied so as to surround the opening of the through hole 10d or the through hole 12d. In addition, an annular groove for holding the leak-preventing member 16 may be formed in either the column 10 or the wooden beam 12, or both, surrounding the opening of the through hole 10d or the through hole 12d.

[0041] The shear force transmission section 34 has a shear force transmission member 35 fixed to the column 10 so as to protrude toward the wooden beam 12, and a receiving recess 12f formed on the end face of the wooden beam 12 to accommodate the shear force transmission member 35, and is structured so that the vertical load acting on the wooden beam 12 is supported by the column 10.

[0042] As shown in Figures 6 and 7, the shear force transmission member 35 is a member having a fixing portion 35a fixed to the side surface of the column 10, a flat plate portion 35b extending from the fixing portion 35a toward the timber beam 12, and a rib 35c provided between the flat plate portion 35b and the fixing portion 35a to increase rigidity. The upper surface of the flat plate portion 35b is a plane perpendicular to the material axis direction of the column 10, that is, a plane parallel to the horizontal plane.

[0043] As shown in Figure 6, when two wooden beams 12 are connected with a column 10 in between, the two shear force transmission members 35 are fixed to the column 10 by fastening members 36 that penetrate the column 10 horizontally. However, when only one wooden beam 12 is connected to the column 10, one shear force transmission member 35 is fixed to the column 10 by fastening members that are not long enough to penetrate the column 10 horizontally.

[0044] The fixing portion 35a of the shear force transmission member 35 is fixed in contact with the core material 10a, which functions as a load support portion, rather than with the covering layer of the column 10, such as the burn-through layer 10c or burn-stopping layer 10b of decorative material. The core material 10a of the column 10 may have a receiving recess formed therein in which the fixing portion 35a of the shear force transmission member 35 is accommodated. This makes it easier to position the shear force transmission member 35 relative to the column 10, and as a result, it is possible to improve the accuracy of the connection of the wooden beam 12 to the column 10.

[0045] The receiving recess 12f is a notch formed in the core material 12a by cutting out the end face of the wooden beam 12 along the beam width direction of the wooden beam 12. The horizontal surface above this notch is the plane to which the upper surface of the flat plate portion 35b of the shear force transmission member 35 abuts, and the shear force transmission member 35 and the wooden beam 12 are in surface contact.

[0046] By bringing the wooden beam 12 into surface contact with the shear force transmission member 35 fixed to the column 10 in this way, it becomes possible to sufficiently resist the shear force generated at the joint between the column 10 and the wooden beam 12. In the examples shown in Figures 6 and 7, the shear force transmission member 35 is provided near the lower end of the wooden beam 12, but the arrangement of the shear force transmission member 35 is not limited to this, and for example, it may be provided near the center of the wooden beam 12. Also, the number of shear force transmission members 35 is not limited to one, and for example, they may be provided in two locations, such as near the lower end of the wooden beam 12 and near the center.

[0047] Here, the column 10 and the wooden beam 12 joined by the above-described joint structure 100 are fire-resistant wooden materials, as shown in Figure 5, each having core materials 10a and 12a that function as load-bearing parts, fire-stopping layers 10b and 12b provided to cover the core materials 10a and 12a, and burn-through layers 10c and 12c of decorative material or the like placed on the surface.

[0048] Thus, in the column 10 and the wooden beam 12, the core members 10a and 12a, which function as load-bearing parts, are covered with a covering layer that includes at least fire-stopping layers 10b and 12b. However, since the joint between the column 10 and the wooden beam 12 is made by directly joining the core members 10a and 12a to each other, the covering layer including the fire-stopping layers 10b and 12b is removed at the joint where the column 10 and the wooden beam 12 face each other.

[0049] If the fire-stopping layers 10b and 12b are partially removed from the column 10 and the wooden beam 12, a discontinuity may occur between the fire-stopping layer 10b of the column 10 and the fire-stopping layer 12b of the wooden beam 12, potentially reducing fire resistance. Therefore, in the joint structure 100, as shown in Figures 5 and 6, a predetermined inter-coating layer clearance C2 is provided between the covering layer including the fire-stopping layer 10b of the column 10 and the covering layer including the fire-stopping layer 12b of the wooden beam 12, and an elastic fire-resistant member 17 is placed in this inter-coating layer clearance C2.

[0050] The fire-resistant member 17 is preferably a fire-resistant board such as a rock wool board or a ceramic blanket, and has enough elasticity to absorb some construction errors so that the discontinuity between the fire-stopping layer 10b of the column 10 and the fire-stopping layer 12b of the wooden beam 12 is reliably eliminated. The fire-resistant member 17 may be attached before the column 10 and the wooden beam 12 are joined together, or after the column 10 and the wooden beam 12 are joined together, but it is preferable to attach it to either the fire-stopping layer 10b on the column 10 side or the fire-stopping layer 12b on the wooden beam 12 side before joining, so that the fire-resistant member 17 is crushed when the wooden beam 12 is joined to the column 10.

[0051] By arranging the fire-resistant fire-stopping layers 10b and 12b and the fire-resistant member 17 in a continuous manner, the fire-resistant performance of the joint structure 100 can be maintained.

[0052] Next, the procedure for joining the column 10 and the timber beam 12 using the joining structure 100 described above will be explained.

[0053] First, horizontal force transmission members 31 are inserted into each of the insertion holes 10d of the column 10, and shear force transmission members 35 are fixed to the side surface of the column 10. The attachment of the horizontal force transmission members 31 and shear force transmission members 35 to the column 10 may be done in advance at the factory where the column 10 is manufactured, or it may be done at the construction site.

[0054] Next, the wooden beam 12 is assembled to the column 10, to which the horizontal force transmission member 31 and the shear force transmission member 35 are attached, from the horizontal direction, in a so-called lateral insertion manner. Before the assembly of the wooden beam 12, the leak prevention member 16 and the fire-resistant member 17 are pre-attached to predetermined positions on the column 10 or the wooden beam 12.

[0055] Even when the horizontal force transmission member 31 is simply inserted into the column 10 and the timber beam 12, that is, when the horizontal force transmission member 31 is not fixed with adhesive, the timber beam 12 will rest on the flat plate portion 35b of the shear force transmission member 35 inserted into the receiving recess 12f, and the load of the timber beam 12 will be supported by the column 10 via the shear force transmission member 35. For this reason, it is possible to temporarily assemble the timber beam 12 to the column 10 relatively easily.

[0056] Next, adhesive is injected through a communication hole 12e formed in one of the two wooden beams 12 that are connected with the column 10 in between. The injected adhesive fills the insertion holes 10d and 12d, and any excess is discharged through a communication hole 12e formed in the other wooden beam 12.

[0057] Once the discharge of the adhesive is confirmed, each communication hole 12e is sealed with a plug (not shown), and the fixing process of the horizontal force transmission member 31 is completed. Then, as time passes, the adhesive hardens and the horizontal force transmission member 31 is fixed to the column 10 and the wooden beam 12, at which point the joining of the column 10 and the wooden beam 12 is completed.

[0058] In this way, the column 10 and the timber beam 12 are joined by the above-described joint structure 100, which includes a horizontal force transmission section 30 and a shear force transmission section 34. The horizontal force transmission section 30 provides sufficient resistance to axial forces such as tensile and compressive forces acting along the timber beam 12, and the vertical load acting on the timber beam 12 is transmitted to the column 10 via the shear force transmission member 35 (shear force transmission section 34) of the above shape, thereby providing sufficient resistance to the shear force generated at the joint between the column 10 and the timber beam 12.

[0059] Next, with reference to Figures 8 and 9, the connection structure 101 between the column 10 and the auxiliary beam 14 will be described.

[0060] As shown in Figures 8 and 9, the auxiliary beam 14 is joined to the connecting member 40 fixed to the column 10 via a drift pin 44.

[0061] The connecting member 40 is a steel member having a fixing portion 40a fixed to the side surface of the column 10 and a plate-shaped connecting portion 40b extending horizontally from the fixing portion 40a and arranged along the vertical plane. Multiple through holes are formed horizontally through the connecting portion 40b through which drift pins 44 can be inserted.

[0062] As shown in Figure 8, when two auxiliary beams 14 are connected with a column 10 in between, the two connecting members 40 are fixed to the column 10 by fastening members 42 that penetrate the column 10 horizontally. When only one auxiliary beam 14 is connected to the column 10, one connecting member 40 is fixed to the column 10 by fastening members that are not long enough to penetrate the column 10 horizontally. The attachment of the connecting members 40 to the column 10 may be done at the factory where the column 10 is manufactured, or it may be done at the construction site.

[0063] As shown in Figures 8 and 9, in principle, the fixing portion 40a of the connecting member 40 abuts against and fixes to the core material 10a, which functions as a load-bearing portion, rather than to the covering layer of the column 10, such as the burn-through layer 10c or burn-stopping layer 10b of decorative material. This ensures reliable stress transfer from the beam to the column. Alternatively, a recess for accommodating the fixing portion 40a of the connecting member 40 may be formed in the core material 10a of the column 10 to prioritize ease of construction. In this case, while there is a concern that the core material 10a, which is the load-bearing portion, may suffer a cross-sectional defect, it becomes easier to position the connecting member 40 relative to the column 10, and the accuracy of the connection of the auxiliary beam 14 to the column 10 can be improved.

[0064] Meanwhile, a groove 14b is formed at the end of the auxiliary beam 14 into which the connecting portion 40b of the connecting member 40 protruding from the column 10 is inserted. The groove 14b is formed along the material axis direction of the auxiliary beam 14 to match the length of the connecting portion 40b and is formed to open at the upper end surface of the auxiliary beam 14.

[0065] By making the groove 14b into which the connecting portion 40b is inserted an open groove on the upper end surface of the auxiliary beam 14, it becomes possible to attach the auxiliary beam 14 from below to the column 10 to which the wooden beam 12 is already connected, at the construction site, so that the connecting portion 40b of the connecting member 40 is inserted into the groove 14b.

[0066] The connecting portion 40b of the connecting member 40 inserted into the groove 14b is joined to the auxiliary beam 14 via a drift pin 44, and the opening above the groove 14b is sealed by a wood insert 41.

[0067] Furthermore, mortar 18 is poured into the gap formed between the fixing portion 40a of the connecting member 40 fixed to the side of the column 10 and the end face of the auxiliary beam 14. By pouring the mortar 18 so as to cover the surface of the fixing portion 40a in this way, it is expected that the mortar 18 will absorb most of the heat in the event of a fire, and the temperature of the fixing portion 40a, which is in contact with and fixed to the core material 10a, will not rise to the ignition temperature of the wood. As a result, even when the connecting member 40 is fixed to the core material 10a of the column 10, it is possible to ensure the fire resistance performance of the core material 10a.

[0068] Furthermore, the connecting member 40 to the auxiliary beam 14 may be fixed with adhesive instead of drift pins 44. Also, instead of sealing the opening above the groove 14b with wood inlay 41, the opening may be sealed by simultaneously pouring mortar 18 into the groove 14b when pouring mortar 18 between the fixing part 40a and the end face of the auxiliary beam 14. In addition, fire-resistant formwork members (for example, mortar boards, etc.) may be appropriately placed to prevent leakage so that mortar 18 is poured at appropriate locations between the fixing part 40a and the end face of the auxiliary beam 14.

[0069] Furthermore, there may be multiple connecting portions 40b. For example, two connecting portions 40b may be arranged parallel to each other in the beam width direction of the auxiliary beam 14. In this case, two grooves 14b are also formed in the beam width direction of the auxiliary beam 14, corresponding to the positions of the connecting portions 40b.

[0070] Furthermore, the groove 14b into which the connecting portion 40b is inserted opens at the upper end surface of the auxiliary beam 14, but it may also be shaped to penetrate vertically so as to open at both the upper and lower end surfaces of the auxiliary beam 14, or it may be shaped to open only at the end surface of the auxiliary beam 14. If the groove 14b is formed to penetrate vertically, the auxiliary beam 14 can be attached to the column 10 not only from below but also by dropping it in from above. If the groove 14b opens only at the end surface of the auxiliary beam 14, the auxiliary beam 14 will be attached to the column 10 by inserting it horizontally, rather than from below or above.

[0071] In this manner, the auxiliary beam 14 is joined to the columns 10 in a way that provides almost no resistance to bending, and transmits mainly shear and axial forces, in order to easily create a difference in horizontal (axis direction) displacement relative to the wooden beam 12 when the pair of columns 10 tilt due to horizontal forces.

[0072] According to the first embodiment described above, the following effects are achieved.

[0073] According to the above-described joint structure 100, a horizontal force transmission section 30 that transmits the horizontal force acting on the wooden beam 12 to the wooden column 10, and a shear force transmission section 34 that transmits the shear force acting on the wooden beam 12 to the column 10 are provided as a column-beam joint structure between the column 10 and the wooden beam 12.

[0074] In this way, by connecting the column 10 and the timber beam 12 via the horizontal force transmission section 30 and the shear force transmission section 34, even when tensile and compressive forces in the axial direction of the beam, i.e., horizontal forces, are applied, the deformation of the frame is suppressed by the horizontal force transmission section 30, and the long-term load acting on the timber beam 12 is transmitted to the column 10 by the shear force transmission section 34, thereby ensuring that the support performance of the frame is stably exhibited.

[0075] Furthermore, by employing the above-described joint structure 100 in a frame structure where the tensile and compressive forces in the axial direction of the timber beam 12 are relatively large, such as in a column-beam frame structure 4 in which a timber beam 12 and an auxiliary beam 14 connected to the timber beam 12 via a connecting member 20 are spanned between a pair of columns 10, at least one of which are timber columns, the rigidity of the frame can be increased, and its seismic resistance can be further improved. This makes it possible to provide a joint structure 100 suitable for the above-described column-beam frame structure 4.

[0076] <Second Embodiment> Next, with reference to Figures 10 and 11, a joint structure 200 according to the second embodiment of the present invention will be described. In the following, the differences from the first embodiment will be mainly described, and the same or equivalent configurations as those described in the first embodiment will not be described.

[0077] The joint structure 200 according to the second embodiment differs from the joint structure 100 according to the first embodiment in that the shear force transmission section 134, which transmits the shear force acting on the timber beam 12 to the column 10, has a connecting member 135 fixed to the side surface of the column 10, a drift pin 136 inserted into an insertion hole 135c formed in the connecting member 135, and an insertion hole 12h formed in the timber beam 12 through which the drift pin 136 is inserted, and the vertical load acting on the timber beam 12 is supported by the column 10 via the connecting member 135 and the drift pin 136.

[0078] As shown in Figures 10 and 11, the connecting member 135 that constitutes the shear force transmission section 134 of the joint structure 200 is a steel member having a fixing section 135a fixed to the side surface of the column 10 and a plate-shaped connecting section 135b extending horizontally from the fixing section 135a and arranged along the vertical plane. Multiple through holes 135c are formed horizontally through the connecting section 135b, through which drift pins 136 can be inserted.

[0079] As shown in Figure 10, when two wooden beams 12 are connected with a column 10 in between, the two connecting members 135 are fixed to the column 10 by fastening members 137 that penetrate the column 10 horizontally. However, when only one wooden beam 12 is connected to the column 10, one connecting member 135 is fixed to the column 10 by fastening members that are not long enough to penetrate the column 10 horizontally. The attachment of the connecting members 135 to the column 10 may be done at the factory where the column 10 is manufactured, or it may be done at the construction site.

[0080] The fixing portion 135a of the connecting member 135 is fixed in contact with the core material 10a, which functions as a load-bearing part, rather than with the covering layer of the column 10, such as the burn-through layer 10c or burn-stopping layer 10b of decorative material. This ensures reliable stress transfer from the beam to the column. Alternatively, a recess for accommodating the fixing portion 135a of the connecting member 135 may be formed in the core material 10a of the column 10, prioritizing ease of construction. In this case, while there is a concern that the core material 10a, which is the load-bearing part, will have a cross-sectional defect, it becomes easier to position the timber beam 12 relative to the column 10, and the accuracy of the connection of the timber beam 12 to the column 10 can be improved.

[0081] On the other hand, the end face of the wooden beam 12 has a receiving groove 12g1 that accommodates the fixing portion 135a and fastening member 137 of the connecting member 135 that protrude from the side surface of the column 10, and a groove 12g2 into which the connecting portion 135b of the connecting member 135 is inserted is formed opening within the receiving groove 12g1. In addition, multiple insertion holes 12h through which drift pins 136 can be inserted are formed at the end of the wooden beam 12, penetrating horizontally through the groove 12g2.

[0082] Furthermore, in addition to the shear force transmission section 134 described above, the joint structure 200 also includes a horizontal force transmission section 30 having a rod-shaped horizontal force transmission member 31 and an adhesive for bonding the horizontal force transmission member 31, similar to the joint structure 100 according to the first embodiment described above.

[0083] Therefore, the column 10 and the wooden beam 12 are connected by a horizontal force transmission member 31 fixed with adhesive, and by the connecting portion 135b of a connecting member 135 inserted into the groove 12g2 of the wooden beam 12 being connected to the wooden beam 12 via a plurality of drift pins 136.

[0084] In this way, the column 10 and the timber beam 12 are joined by the above-described joint structure 200, which includes a horizontal force transmission section 30 and a shear force transmission section 134. The horizontal force transmission section 30 provides sufficient resistance to axial forces such as tensile and compressive forces acting along the timber beam 12, and the vertical load acting on the timber beam 12 is transmitted to the column 10 via the drift pin 136 and connecting member 135, thereby providing sufficient resistance to the shear force generated at the joint between the column 10 and the timber beam 12.

[0085] In the example shown in Figure 10, all of the horizontal force transmission members 31 are positioned above the shear force transmission section 134, but some of the horizontal force transmission members 31 may be positioned below the shear force transmission section 134.

[0086] The second embodiment described above provides the following effects.

[0087] According to the above-described joint structure 200, a horizontal force transmission section 30 that transmits the horizontal force acting on the wooden beam 12 to the wooden column 10, and a shear force transmission section 134 that transmits the shear force acting on the wooden beam 12 to the column 10 are provided as a column-beam joint structure between the column 10 and the wooden beam 12.

[0088] In this way, by connecting the column 10 and the timber beam 12 via the horizontal force transmission section 30 and the shear force transmission section 134, even when tensile and compressive forces in the axial direction of the beam, i.e., horizontal forces, are applied, the deformation of the frame is suppressed by the horizontal force transmission section 30, and the long-term load acting on the timber beam 12 is transmitted to the column 10 by the shear force transmission section 134, thereby ensuring that the support performance of the frame is stably exhibited.

[0089] Furthermore, by employing the above-described joint structure 200 in a frame structure where the tensile and compressive forces in the axial direction of the timber beam 12 are relatively large, such as in a column-beam frame structure 4 in which a timber beam 12 and an auxiliary beam 14 connected to the timber beam 12 via a connecting member 20 are spanned between a pair of columns 10, at least one of which are timber columns, the rigidity of the frame can be increased, and its seismic resistance can be further improved. This makes it possible to provide a joint structure 200 suitable for the above-described column-beam frame structure 4.

[0090] <Third Embodiment> Next, with reference to Figures 12 and 13, a joint structure 300 according to the third embodiment of the present invention will be described. In the following, the differences from the first embodiment will be mainly described, and the same or equivalent configurations as those described in the first embodiment will not be described.

[0091] The joint structure 300 according to the third embodiment differs from the joint structure 100 according to the first embodiment described above in that the shear force transmission section 234 that transmits the shear force acting on the timber beam 12 to the column 10 includes a rod-shaped shear force transmission member 235 arranged along the material axis direction of the timber beam 12 so as to connect the column 10 and the timber beam 12, and an adhesive such as epoxy resin (not shown) that adheres the shear force transmission member 235 to the column 10 and the timber beam 12, and the vertical load acting on the timber beam 12 is supported by the column 10 via the rod-shaped shear force transmission member 235. Figures 12 and 13 are cross-sectional views showing the cross-section corresponding to Figure 6.

[0092] The shear force transmission member 235 that constitutes the shear force transmission section 234 of the joint structure 300 is, for example, a steel bar with a roughly circular cross-section and an uneven surface, such as a deformed reinforcing bar or a threaded reinforcing bar. The column 10 has an insertion hole 10g formed horizontally through which the shear force transmission member 235 is inserted, and the end face of the wooden beam 12 has an insertion hole 12i, which is a non-penetrating hole into which the end of the shear force transmission member 235 is inserted.

[0093] The shear force transmission member 235 is fixed to the column 10 and the wooden beam 12 by filling the insertion holes 10g and 12i with adhesive, similar to the horizontal force transmission member 31 of the joint structure 100 according to the first embodiment described above.

[0094] Furthermore, as shown in Figure 12, the joint structure 300, similar to the joint structure 100 according to the first embodiment described above, includes a horizontal force transmission section 30 having a rod-shaped horizontal force transmission member 31 and an adhesive for bonding the horizontal force transmission member 31.

[0095] The shear force transmission member 235 is, for example, a steel rod with the same diameter as the horizontal force transmission member 31, but its length inserted into the timber beam 12 is set to be shorter than that of the horizontal force transmission member 31. In other words, the length of the through hole 12i into which the end of the shear force transmission member 235 is inserted, formed in the end face of the timber beam 12, is set to be shorter than the length of the through hole 12d into which the end of the horizontal force transmission member 31 is inserted. As will be described later, the outer diameter of the shear force transmission member 235, which plays the role of transmitting vertical loads, may be set to be larger than or smaller than the outer diameter of the horizontal force transmission member 31.

[0096] In the example shown in Figure 12, six horizontal force transmission members 31 constituting the horizontal force transmission section 30 are arranged in the center of the wooden beam 12 (2 rows x 3 levels), and two shear force transmission members 235 constituting the shear force transmission section 234 are arranged near the upper end and near the lower end of the wooden beam 12 (2 rows x 1 level each).

[0097] By concentrating the horizontal force transmission members 31, which have a long anchoring length, in the central part of the timber beam 12 in the height direction, the rotational rigidity is reduced, resulting in a joint configuration similar to a pin joint, which allows for sufficient resistance to axial forces. Furthermore, by providing shear force transmission members 235, which have a short anchoring length, near the upper and lower ends of the timber beam 12, and allowing the vertical load acting on the timber beam 12 to be transmitted to the column 10 via these shear force transmission members 235, it becomes possible to sufficiently resist the shear force generated at the joint between the column 10 and the timber beam 12.

[0098] The number and arrangement of the horizontal force transmission members 31 and shear force transmission members 235 are not limited to the example shown in Figure 12. It is sufficient if multiple horizontal force transmission members 31 are placed in the center of the wooden beam 12, and multiple shear force transmission members 235 are placed near the upper and lower ends of the wooden beam 12.

[0099] Furthermore, the joint structure 300 may also be configured such that the shear force transmission section 234 is located in the center of the timber beam 12 and the horizontal force transmission section 30 is located near the upper and lower ends of the timber beam 12, as shown in the modified example in Figure 13. In the example shown in Figure 13, four horizontal force transmission members 31 constituting the horizontal force transmission section 30 are located near the upper end of the timber beam 12 (2 rows x 2 levels), and two are located near the lower end of the timber beam 12 (2 rows x 1 level). Four shear force transmission members 235 constituting the shear force transmission section 234 are located in the center of the timber beam 12 (2 rows x 2 levels).

[0100] By positioning the horizontal force transmission members 31, which have a long anchoring length, near the upper and lower ends of the wooden beam 12, rotational rigidity is increased, resulting in a joint configuration close to a rigid joint, which makes it possible to increase bending strength while resisting axial forces. Furthermore, by providing the shear force transmission members 235, which have a short anchoring length, in the central part of the wooden beam 12, and allowing the vertical load acting on the wooden beam 12 to be transmitted to the column 10 via these shear force transmission members 235, it becomes possible to sufficiently resist the shear force generated at the joint between the column 10 and the wooden beam 12.

[0101] Furthermore, the number and arrangement of the horizontal force transmission members 31 and shear force transmission members 235 are not limited to the example shown in Figure 13. It is sufficient if multiple horizontal force transmission members 31 are placed near the upper and lower ends of the wooden beam 12, and multiple shear force transmission members 235 are placed in the central part of the wooden beam 12.

[0102] The third embodiment described above provides the following effects.

[0103] According to the above-described joint structure 300, a horizontal force transmission section 30 that transmits the horizontal force acting on the wooden beam 12 to the wooden column 10, and a shear force transmission section 234 that transmits the shear force acting on the wooden beam 12 to the column 10 are provided as a column-beam joint structure between the column 10 and the wooden beam 12.

[0104] In this way, by connecting the column 10 and the timber beam 12 via the horizontal force transmission section 30 and the shear force transmission section 234, even when tensile and compressive forces in the axial direction of the beam, i.e., horizontal forces, are applied, the deformation of the frame is suppressed by the horizontal force transmission section 30, and the long-term load acting on the timber beam 12 is transmitted to the column 10 by the shear force transmission section 234, thereby ensuring that the support performance of the frame is stably exhibited.

[0105] Furthermore, by employing the above-described joint structure 300 in a frame structure where the tensile and compressive forces in the axial direction of the timber beam 12 are relatively large, such as in a column-beam frame structure 4 in which a timber beam 12 and an auxiliary beam 14 connected to the timber beam 12 via a connecting member 20 are spanned between a pair of columns 10, at least one of which are timber columns, the rigidity of the frame can be increased, and its seismic resistance can be further improved. This makes it possible to provide a joint structure 300 suitable for the above-described column-beam frame structure 4.

[0106] In the embodiments described above, the case where both columns 10 of the pair are made of wood was explained. However, the case where one of the columns 10 is made of wood and the other column 110 is made of steel will be explained with reference to Figure 14. Figure 14 shows the part where the wooden beam 12 and auxiliary beam 14 described above are joined to the steel column 110.

[0107] On the side of the steel-framed column 110, a plate-shaped first connecting member 50 for connecting the wooden beam 12 and a plate-shaped second connecting member 54 for connecting the auxiliary beam 14 are joined by welding or the like. Meanwhile, a groove 12j into which the first connecting member 50 is inserted is formed on the end face of the wooden beam 12, and a groove 14c into which the second connecting member 54 is inserted is formed on the end face of the auxiliary beam 14.

[0108] Then, the first connecting member 50 inserted into the groove 12j of the wooden beam 12 is joined to the wooden beam 12 via a plurality of drift pins 52, thereby joining the column 110 to the wooden beam 12, and the second connecting member 54 inserted into the groove 14c of the auxiliary beam 14 is joined to the auxiliary beam 14 via a plurality of drift pins 56, thereby joining the column 110 to the auxiliary beam 14.

[0109] The groove 14c of the auxiliary beam 14 is formed to open at the upper end surface of the auxiliary beam 14, similar to the groove 14b described above. Therefore, after the auxiliary beam 14 is attached to the column 110 from below, the upper opening of the groove 14c is sealed by the wood insert 58.

[0110] Furthermore, the connection structure of the wooden beam 12 and auxiliary beam 14 to the other column 110, such as a steel-framed column, is not limited to the above structure. For example, steel bars with uneven surfaces, such as deformed reinforcing bars or threaded reinforcing bars, may be embedded horizontally in the reinforced concrete column beforehand, and the ends of the steel bars may be fixed to the wooden beam 12 and auxiliary beam 14 via adhesive, similar to the horizontal force transmission member 31 described above.

[0111] The other column 110 may be a composite structural column formed by having a reinforced concrete or steel frame interior surrounded by a wood panel such as CLT (cross-laminated timber). For example, it may be a column formed by using CLT as formwork to pour concrete and then leaving the CLT exposed.

[0112] Furthermore, while the other column 110 may have concrete exposed on its surface, it is preferable that its surface be finished in a way that allows the wood grain to be visible, such as with a square timber made of laminated wood, in order to create a traditional, calm interior space or to improve the quality of the interior space.

[0113] Furthermore, the following modifications are also within the scope of the present invention, and it is possible to combine the configurations shown in the modifications with the configurations described in each of the embodiments described above, or to combine the configurations described in the following different modifications. It is also possible to combine the above-described embodiments with each other.

[0114] In each of the above embodiments, when two wooden beams 12 are connected with a column 10 in between, the adhesive used to fix the steel rods such as the horizontal force transmission member 31 is injected through a communication hole 12e formed in one wooden beam 12 and discharged through a communication hole 12e formed in the other wooden beam 12. Alternatively, as shown in the first modified example in Figure 15, each wooden beam 12 may have a communication hole 12e for injecting the adhesive and a communication hole 12k for discharging the adhesive, and the column 10 may also have a communication hole 10e for injecting the adhesive and a communication hole 10f for discharging the adhesive.

[0115] In this first modified example, the column 10 and the horizontal force transmission member 31 are pre-integrated in a factory or the like by filling the insertion hole 10d with adhesive while both ends of the horizontal force transmission member 31 protrude from the column 10. As an example of integration, before the adhesive is filled into the insertion hole 10d, both ends of the horizontal force transmission member 31 are inserted into the insertion hole 10d while protruding from the column 10, and leak prevention members 116 are attached to each opening end of the insertion hole 10d. Then, adhesive is filled into the insertion hole 10d into which the horizontal force transmission member 31 is inserted through one communication hole 10e, and the excess is discharged through the other communication hole 10f. As a result, the column 10 and the horizontal force transmission member 31 are integrated.

[0116] When connecting the wooden beam 12 to the column 10 which is integrated with the horizontal force transmission member 31, adhesive is filled into the insertion hole 12d into which the end of the horizontal force transmission member 31 is inserted, through one communication hole 12e formed in the wooden beam 12, and the excess is discharged through the other communication hole 12k formed in the same wooden beam 12.

[0117] In order to prevent the adhesive filled in the insertion hole 12d from leaking out to the outside through the column-beam clearance C1, a leak prevention member 117 is attached in advance to the opening end of the insertion hole 12d.

[0118] This makes it possible to connect one wooden beam 12 to each column 10, even when two wooden beams 12 are connected with a column 10 in between.

[0119] Furthermore, as shown in the second modified example in Figure 16, one timber beam 12 that is first joined to the column 10 may have only a connecting hole 12e that serves as an adhesive injection hole, and the column 10 may have only a connecting hole 10f that serves as an adhesive discharge hole, while the other timber beam 12 that is later joined to the column 10 may have both a connecting hole 12e that serves as an adhesive injection hole and a connecting hole 12k that serves as an adhesive discharge hole.

[0120] In this second modification, one end of the horizontal force transmission member 31 is inserted into the through-hole 12d formed in the first wooden beam 12 that is joined first. Then, adhesive is filled into the through-hole 12d and the through-hole 10d through the communication hole 12e, thereby fixing the horizontal force transmission member 31 to the column 10 and the wooden beam 12 with the other end of the horizontal force transmission member 31 protruding from the column 10. As an example of fixing, a leak prevention member 16 is pre-installed between the first wooden beam 12 and the column 10 that are joined first, and a leak prevention member 116 is pre-installed at the opening end of the through-hole 10d in the column 10 from which the other end of the horizontal force transmission member 31 protrudes. Adhesive is then filled into the through-hole 12d and the through-hole 10d into which the horizontal force transmission member 31 is inserted through the through-hole 12d formed in the first wooden beam 12, and the excess is discharged through the communication hole 10f formed in the column 10. As a result, the horizontal force transmission member 31 is fixed to one of the wooden beams 12 and the column 10.

[0121] Next, the other end of the horizontal force transmission member 31 protruding from the column 10 is inserted into the through hole 12d formed in the other wooden beam 12. Adhesive is then filled into the through hole 12d through the communication hole 12e formed in the other wooden beam 12, and the excess is discharged through the communication hole 12k formed in the other wooden beam 12.

[0122] In order to prevent the adhesive filled in the through-hole 12d formed in the other wooden beam 12, which will be joined to the column 10 later, from leaking out to the outside through the column-beam clearance C1, a leak prevention member 117 is attached in advance to the opening end of the through-hole 12d formed in the other wooden beam 12.

[0123] This makes it possible to connect one wooden beam 12 to each column 10, even when two wooden beams 12 are connected with a column 10 in between.

[0124] Furthermore, in each of the above embodiments, the communication holes 12e used when filling with adhesive are formed along the beam width direction (horizontal direction). Alternatively, as shown in the third modified example in Figure 17, the communication holes 12e may be formed upward along the beam depth direction (vertical direction). In this third modified example, in order to secure space for the formation of the communication holes 12e, the length of the insertion holes 12d into which the ends of steel rods such as the horizontal force transmission member 31 are inserted is set to be longer for those formed lower down.

[0125] By positioning the open end of the communication hole 12e on the upper surface of the wooden beam 12 in this way, the sealing plug that seals the communication hole 12e is not exposed on the side surface of the wooden beam 12, thereby improving the aesthetic appearance of the wooden beam 12. The length of the steel rod such as the horizontal force transmission member 31 inserted may be changed according to the length of the insertion hole 12d formed below. In addition, a restricting member may be provided to restrict the movement of the steel rod such as the horizontal force transmission member 31 inserted into the insertion hole 12d formed below by filling it with adhesive.

[0126] Furthermore, although the above embodiments described a case where the wooden beam 12 is a simply formed beam with both ends joined to a pair of columns 10, the wooden beam may also be a continuous beam joined to the upper ends of multiple columns, including the pair of columns 10.

[0127] Furthermore, in each of the above embodiments, the connecting members 20 and 120 are steel dampers made of metal material. Alternatively, the damping member may be any form of damper as long as it has a structure capable of absorbing energy. For example, it may be a viscoelastic or viscous damper, a friction damper that absorbs energy using friction, or a honeycomb damper (registered trademark) formed by arranging multiple hexagonal holes in a steel plate.

[0128] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of symbols]

[0129] 100,200,300...joint structure 4... Column beam frame (frame) 10...Pillar (wooden column) 10a...Core material 10b...fire-stopping layer 12...Wood beam 12a...Core material 12b...fire-stopping layer 12f...Accommodation recess (shear force transmission section) 12h... Through hole (shear force transmission part) 14...Auxiliary beam 16,116,117... Leak prevention components 17. Fire-resistant materials 20,120...Connecting parts 30. Horizontal force transmission section 31. Horizontal force transmission member 34,134,234...Shear force transmission section 35. Shear force transmission member (shear force transmission section) 135...Connecting member (shear force transmission part) 136...Drift pin (shear force transmission part) 235...Shear force transmission member (shear force transmission section) C1... Column-beam clearance C2... Interlayer clearance

Claims

1. A structural joint in which a wooden beam and an auxiliary beam connected to the wooden beam via a connecting member are spanned between a pair of columns, at least one of which is a wooden column, As a column-beam joint structure between the aforementioned wooden column and the aforementioned wooden beam, A horizontal force transmission unit that transmits the horizontal force acting on the wooden beam to the wooden column, The system includes a shear force transmission unit, provided separately from the horizontal force transmission unit, which transmits the shear force acting on the timber beam to the timber column. Joint structure.

2. The horizontal force transmission section is, A rod-shaped horizontal force transmission member is arranged along the material axis direction of the wooden beam so as to connect the wooden column and the wooden beam, The horizontal force transmission member is bonded to the wooden column and the wooden beam with an adhesive, The joining structure according to claim 1.

3. A predetermined column-beam clearance of a certain size is provided between the wooden column and the wooden beam connected via the horizontal force transmission member, The system further includes a leak-preventing member that prevents the adhesive from leaking out through the column-beam clearance. The joining structure according to claim 2.

4. The shear force transmission section is, A shear force transmission member fixed to the wooden column so as to protrude toward the wooden beam, The end face of the wooden beam has a receiving recess formed therein, which accommodates at least a portion of the shear force transmission member, The joining structure according to any one of claims 1 to 3.

5. The shear force transmission section is, A rod-shaped shear force transmission member is arranged along the material axis of the wooden beam so as to connect the wooden column and the wooden beam, The shear force transmission member comprises an adhesive for bonding the shear force transmission member to the wooden column and the wooden beam, The insertion length of the shear force transmission member inserted into the wooden beam is shorter than the insertion length of the horizontal force transmission member inserted into the wooden beam. The joining structure according to claim 2 or 3.

6. The aforementioned wooden columns and wooden beams are fire-resistant wood materials in which the load-bearing portion is covered with a covering layer that includes at least a fire-stopping layer. A predetermined clearance between the covering layer of the wooden column and the covering layer of the wooden beam is provided. In the clearance between the covering layers, an elastic fire-resistant member is placed in a state compressed by the fire-stopping layer of the wooden column and the fire-stopping layer of the wooden beam. The joining structure according to any one of claims 1 to 3.

7. The connecting member that connects the wooden beam and the auxiliary beam is a damping member that dampens the horizontal force acting on the pair of columns in accordance with the difference in displacement in the axial direction of the wooden beam and the auxiliary beam. The joining structure according to any one of claims 1 to 3.

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