Joint structures and buildings containing joint structures
The joint structure addresses timber damage by using a steel rod and reinforcing plates to distribute bearing pressure, enhancing shear strength and durability in wooden beams.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- FUJITA CO LTD
- Filing Date
- 2022-10-25
- Publication Date
- 2026-07-22
AI Technical Summary
Existing joint structures in buildings, such as the GIR joint and T-shaped joining plate methods, are prone to damage the timber due to shearing forces, particularly when upward forces are applied.
A joint structure comprising a wooden beam, a steel rod inserted into the wooden beam, and a reinforcing member with first and second reinforcing plates that sandwich the steel rod, distributing bearing pressure and preventing sinking.
The joint structure enhances the shear strength of the wooden beam by reducing deflection and preventing bearing pressure failure, ensuring a strong and durable connection.
Smart Images
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Abstract
Description
Technical Field
[0001] One embodiment of the present invention relates to a joined structure and a building including the joined structure.
Background Art
[0002] Conventionally, as a method for connecting timbers in a building, for example, there is a GIR (Glued in Rod) joint in which holes are made in the timbers and joining rods and adhesives are inserted and filled therein. On the other hand, Patent Document 1 discloses an easier method for on-site construction in which a joining plate protruding in a T shape is attached to a timber in advance, and the timbers are joined by inserting the plate into a plate insertion portion and fastening with a drift pin. However, when an upward force is applied to the timber, a shearing force is transmitted from the joining rod, the joining plate, etc. to the timber, and there is concern about damage to the timber due to indentation.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] One of the problems of one embodiment of the present invention is to provide a joined structure including a wooden beam. Alternatively, one of the problems of one embodiment of the present invention is to provide a joined structure capable of suppressing damage to a wooden beam.
Means for Solving the Problems
[0005] One embodiment of the present invention provides a joint structure comprising a wooden beam, a beam end positioned at the end of the wooden beam, a steel rod inserted into the wooden beam in the extending direction of the wooden beam and joining the wooden beam and the beam end by a fixing jig, and a reinforcing member including a first reinforcing plate provided on the steel rod inserted into the wooden beam, and a second reinforcing plate facing the first reinforcing plate with the steel rod in between. [Brief explanation of the drawing]
[0006] [Figure 1] A schematic side view of a structure which is one embodiment of the present invention. [Figure 2A] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 2B] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 3] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 4] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 5] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 6A] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 6B] A front view of a reinforcing member, which is one embodiment of the present invention. [Figure 6C] A side view of a reinforcing material, which is one embodiment of the present invention. [Figure 7A] A schematic cross-sectional view of a joint structure, which is one embodiment of the present invention. [Figure 7B] A front view of a reinforcing member, which is one embodiment of the present invention. [Modes for carrying out the invention]
[0007] The embodiments of the present invention will be described below with reference to the drawings and other documents. However, the present invention can be implemented in various forms without departing from its spirit, and is not to be interpreted as being limited to the embodiments described below.
[0008] While drawings may schematically represent the width, thickness, shape, etc., of each part compared to the actual embodiment in order to clarify the explanation, these are merely examples and do not limit the interpretation of the present invention. In this specification and each figure, elements having the same function as those described with respect to previously shown figures are denoted by the same reference numeral, and redundant explanations may be omitted. When indicating a part of an element denoted by a reference numeral, a lowercase alphabet letter is added to the reference numeral. When indicating multiple elements having the same or similar structure separately, a hyphen and a natural number are added after the reference numeral. When indicating multiple elements having the same or similar structure collectively, only the reference numeral is used.
[0009] <First Embodiment> The following describes the structure of a structural element that is one embodiment of the present invention. For convenience, in the drawings used in this description, the plane parallel to the horizontal ground surface will be considered the xy-plane, and the vertical direction perpendicular to the xy-plane will be considered the z-direction.
[0010] 1.Overall structure The structure's basic configuration includes multiple columns extending vertically (z-direction), multiple beams connected to pairs of columns and extending horizontally (x-direction or y-direction), and floor slabs provided on top of the beams. The beams are connected to adjacent pairs of columns.
[0011] Beams in a structure include timber beams. All beams in a structure may include timber beams, or some beams may include timber beams and the other beams may be steel beams.
[0012] 2. Pillar Figure 1 shows a schematic side view of a pair of columns 110 and a beam 120 connected thereto. In Figure 1, the floor slab is omitted. The floor slab is reinforced concrete provided on the beam 120, and a known structure can be used, so its explanation is omitted here.
[0013] There is no particular restriction as long as the number of columns 110 is 4 or more. The number and arrangement may be appropriately determined according to the size and shape of the structure. Column 110 is connected to piles or foundation beams not shown in the figure. The shape of column 110 (end face shape in the xy plane) is also arbitrary and may be appropriately selected from a quadrilateral, a circle, an ellipse, etc. The length of column 110 is also appropriately designed according to the size of the structure and the height of each floor. Each column 110 is a reinforced concrete structure including a reinforcing bar unit and concrete. However, it is not limited to this, and each column 110 may be a steel frame structure.
[0014] 3. Beam As shown in FIG. 1, the beam 120 includes a wooden beam 121, a beam end portion 123 having an end plate 124, and a steel bar 125 joining the wooden beam 121 and the end plate 124. A schematic cross-sectional view of the joint structure 12 including the wooden beam 121 and the beam end portion 123 is shown in FIG. 2A. A schematic view of a cross-section along the chain line A-A' in FIG. 2A is shown in FIG. 2B. In order to make the structure of the joint structure 12 easier to see, the floor slab 150 is shown by a dotted line in FIGS. 2A and 2B.
[0015] The wooden beam 121 includes wood, and its end face shape (end face perpendicular to the extending direction of the wooden beam 121) can be arbitrarily determined. The end face shape of the wooden beam 121 may be, for example, a polygon such as a circle, an ellipse, or a quadrilateral. Alternatively, the contour of the end face shape of the wooden beam 121 may be formed by a plurality of curves and a plurality of straight lines. Also, the cross-sectional shape of the wooden beam 121 may be constant in the extending direction of the wooden beam 121, or may continuously change due to the original shape of the wood. There is no restriction on the type of wood either. For example, wood derived from coniferous trees such as cypress, pine, and cedar may be used, or wood derived from broad-leaved trees such as oak, beech, zelkova, walnut, teak, and mahogany may be used. Also, the wooden beam 121 may be formed of plywood in which a plurality of plate-like woods are bonded together.
[0016] The beam end 123 is vertically connected to the column 110. The beam end 123 has a steel frame structure. The end face shape of the beam end 123 (the end face perpendicular to the extending direction of the beam end 123) can be arbitrarily determined. The end face shape of the beam end 123 may be, for example, H-shaped, angular, circular, gable-shaped, groove-shaped, lip groove-shaped, etc. Also, the cross-sectional shape of the beam end 123 may be constant in the extending direction of the beam end 123.
[0017] The beam end 123 has an end plate 124 at the end opposite to the column 110. The end plate 124 has a flat plate shape and is arranged perpendicular to the extending direction of the beam end 123 so as to cover the end face of the beam end 123. The end plate 124 is larger than the end face of the beam end 123 and has a peripheral region surrounding the joint surface with the beam end 123. The peripheral region of the end plate 124 extends in four directions (YZ plane direction) of up, down, left, and right from the joint surface with the beam end 123 and protrudes in a direction perpendicular to the extending direction of the beam end 123. However, it is not limited to this, and the end plate 124 may overlap with the entire end face of the wooden beam 121 and the extending direction (X direction) of the wooden beam 121 at the beam end 123. The end plate 124 is joined to the beam end 123 by welding or the like.
[0018] As shown in FIGS. 2A and FIG. 2B, the end of the wooden beam 121 faces the end plate 124 at the end of the beam end 123. A plurality of through holes are arranged in the peripheral region of the end plate 124 at a position overlapping the wooden beam 121 in the extending direction (X direction) of the wooden beam 121. In the wooden beam 121, holes are arranged at positions overlapping the through holes of the end plate 124 in the extending direction (X direction) of the wooden beam 121. The holes in the wooden beam 121 extend in the extending direction (X direction) of the wooden beam 121. The length of the holes in the wooden beam 121 is not particularly limited. The holes in the wooden beam 121 may penetrate the entire wooden beam 121.
[0019] Steel rods 125 are placed in the through holes of the continuous end plates 124 and the holes in the wooden beam 121. The steel rods 125 are inserted into the wooden beam 121 from its end in the extension direction (X direction). The length of the steel rods 125 is not particularly limited. The steel rods 125 may extend to the opposite end of the wooden beam 121 in the extension direction (X direction) (dotted line). In this case, the steel rods 125 may form a joint structure 12 at the opposite end of the wooden beam 121. By inserting steel rods 125, which have a Young's modulus greater than that of wood, into the holes of the wooden beam 121, the apparent second moment of area increases, and the deflection of the wooden beam 121 can be reduced.
[0020] A reinforcing member 130 is placed in the hole of the wooden beam 121. The reinforcing member 130 is placed between the wooden beam 121 and the steel rod 125. The reinforcing member 130 includes a first reinforcing plate 131 and a second reinforcing plate 132, which are inserted into the wooden beam 121 from the end of the wooden beam 121 in the direction of extension of the wooden beam 121 (X direction). The first reinforcing plate 131 is placed on the steel rod 125 inserted into the wooden beam 121. The second reinforcing plate 132 faces the first reinforcing plate 131 with the steel rod 125 in between. The first reinforcing plate 131 and the second reinforcing plate 132 are placed in a position that overlaps with the steel rod 125 in the vertical direction (Z direction). Preferably, the first reinforcing plate 131 and the second reinforcing plate 132 are placed in contact with the inner surface of the hole in the wooden beam 121. In this embodiment, the first reinforcing plate 131 and the second reinforcing plate 132 are shown as a pair. Preferably, the horizontal width (length in the Y direction) of the first reinforcing plate 131 and the second reinforcing plate 132 at the end face of the wooden beam 121 is greater than the width (length in the Y direction) of the steel rod 125.
[0021] The holes in the wooden beam 121 are filled with adhesive 127. The adhesive 127 is placed between the wooden beam 121 and the steel rod 125. The adhesive 127 is also placed between the reinforcing material 130 and the steel rod 125. The steel rod 125 is fixed to the wooden beam 121 by the adhesive 127 within the holes in the wooden beam 121.
[0022] The steel rod 125 protrudes from the end of the timber beam 121 and has a male thread at the end that penetrates the end plate 124. A nut (fixing jig) 126, which includes a female thread, is screwed onto the male thread at the end of the steel rod 125. The nut 126 joins the timber beam 121 and the beam end 123 with the end plate 124 in between. The timber beam 121 and the end plate 124 are in contact. However, this is not limited to this, and the timber beam 121 and the end plate 124 may be spaced apart. A washer (not shown) may be placed between the nut 126 and the end plate 124. Multiple steel rods 125 are arranged in positions that do not interfere with the beam end 123 of the end plate 124.
[0023] Figure 2B shows four steel bars 125 connected to the joint structure 12, but the number of steel bars 125 can be determined arbitrarily. It is preferable that the steel bars 125 be arranged at equal intervals relative to the timber beam 121.
[0024] The wooden beam 121 is joined at both ends to the beam ends 123 via the connecting structure 12, parallel to the beam ends 123. This fixes the wooden beam 121 to the column 110. The floor slab 150 is placed on top of the wooden beam 121 and the beam ends 123. Part of the end plate 124 may be embedded in the floor slab 150.
[0025] As described above, the joint structure 12 according to one embodiment of the present invention is provided with a reinforcing member 130 including at least one pair of first reinforcing plates 131 and a second reinforcing plate 132 that sandwich the steel rod 125 in the vertical direction. With this configuration, the joint structure 12 can distribute the bearing pressure by the reinforcing member 130 provided at the end of the wooden beam 121, suppressing the concentration of bearing pressure and reducing the sinking of the steel rod 125. As a result, bearing pressure failure of the wooden beam 121 is prevented, and the beam 120 exhibits high shear strength.
[0026] <Second Embodiment> In this embodiment, a structure in which the steel rod 125 described in the first embodiment penetrates and is fixed to the column 110a will be described. Descriptions of configurations identical or similar to those described in the first embodiment may be omitted.
[0027] Figure 3 shows a schematic cross-sectional view of the joint structure 12a, which includes the timber beam 121 and the beam end 123. To make the structure of the joint structure 12a easier to see, the floor slab 150 is shown as a dotted line in Figure 3.
[0028] As shown in Figure 3, the end of the timber beam 121 and the end plate 124 at the end of the beam end 123 face each other. Multiple through holes are arranged in the end plate 124 at positions that overlap with the timber beam 121 in the extension direction (X direction) of the timber beam 121. Holes are arranged in the timber beam 121 at positions that overlap with the through holes in the end plate 124 in the extension direction (X direction) of the timber beam 121. Through holes are arranged in the column 110a at positions that overlap with the through holes in the end plate 124 and the holes in the timber beam 121 in the extension direction (X direction) of the beam end 123.
[0029] Steel rods 125 are placed in the through-holes of column 110a, the through-holes of end plate 124, and the holes in timber beam 121. The steel rods 125 penetrate column 110a.
[0030] The steel rod 125 protrudes from the end of the timber beam 121 and has a male thread at the end that penetrates the end plate 124 and the column 110a. A nut (fixing jig) 126 with a female thread is screwed onto the male thread at the end of the steel rod 125. The nut 126 connects the timber beam 121 and the column 110a by sandwiching the end plate 124 and the beam end 123. The timber beam 121 and the end plate 124 are in contact. However, this is not limited to the timber beam 121 and the end plate 124 may be spaced apart. Multiple steel rods 125 are arranged in positions that do not interfere with the beam end 123 of the end plate 124. By providing the end plate 124, it is possible to prevent the timber beam 121 from sinking into the contact surface and the resulting damage.
[0031] The timber beam 121 is joined perpendicularly to the column 110a at both ends via the connecting structure 12a. The floor slab 150 is placed on top of the timber beam 121 and the beam ends 123. Part of the end plate 124 may be embedded in the floor slab 150.
[0032] As described above, in one embodiment of the present invention, the joint structure 12a has a steel rod 125 that penetrates and is fixed to the end plate 124 and the column 110a. With this configuration, the joint structure 12a can further secure the connection between the wooden beam 121, the beam end 123, and the column 110a.
[0033] <Third Embodiment> In this embodiment, a structure in which the steel rod 125 described in the first embodiment is embedded and fixed in the beam end portion 123b will be described. Descriptions of configurations identical or similar to those described in the first embodiment may be omitted.
[0034] Figure 4 shows a schematic cross-sectional view of the joint structure 12b, which includes the timber beam 121 and the beam end 123b. To make the structure of the joint structure 12b easier to see, the floor slab 150 is shown as a dotted line in Figure 4.
[0035] In this embodiment, the beam end portion 123b is a reinforced concrete structure including a reinforcing bar unit and concrete. The end face shape of the beam end portion 123b (the end face perpendicular to the extension direction of the beam end portion 123b) can be arbitrarily determined. The end face shape of the beam end portion 123b may be, for example, a square, a circle, or an ellipse. Furthermore, the cross-sectional shape of the beam end portion 123b may be constant in the extension direction of the beam end portion 123b.
[0036] As shown in Figure 4, the end of the wooden beam 121 and the end of the beam end 123b face each other. Multiple holes are arranged in the beam end 123b at positions that overlap with the wooden beam 121 in the extension direction (X direction) of the wooden beam 121. Holes are arranged in the wooden beam 121 at positions that overlap with the holes in the beam end 123b in the extension direction (X direction) of the wooden beam 121. Steel rods 125 are placed in the continuous holes in the beam end 123b and the holes in the wooden beam 121.
[0037] The steel rod 125 protrudes from the end of the timber beam 121 and is inserted into the timber beam 121 in the extension direction (X direction) from the end of the beam end 123b. The length of the steel rod 125 is not particularly limited. An anchoring fitting (fixing jig) 126b is joined to the end of the steel rod 125 on the beam end 123b side. The anchoring fitting 126b is embedded in the beam end 123b. The steel rod 125 and the anchoring fitting 126b join the timber beam 121 and the beam end 123b. However, this is not limited to this, and the anchoring fitting 126b may be omitted. The timber beam 121 and the beam end 123b are in contact. However, this is not limited to this, and the timber beam 121 and the beam end 123b may be spaced apart.
[0038] The wooden beam 121 is joined at both ends to the beam ends 123b via connecting structures 12b, parallel to each other. The floor slab 150 is placed on top of the wooden beam 121 and the beam ends 123b.
[0039] As described above, in one embodiment of the present invention, the joint structure 12b has a steel rod 125 and a fixing fitting 126b embedded and fixed in the beam end 123b. With this configuration, the joint structure 12b can further secure the connection between the timber beam 121 and the beam end 123b.
[0040] <Fourth Embodiment> In this embodiment, a structure in which the steel rod 125 described in the third embodiment penetrates and is fixed to the column 110c will be described. Configurations that are the same as or similar to those described in the first and third embodiments may be omitted from the description.
[0041] Figure 5 shows a schematic cross-sectional view of the joint structure 12c, which includes the timber beam 121 and the beam end 123c. To make the structure of the joint structure 12c easier to see, the floor slab 150 is shown as a dotted line in Figure 5.
[0042] As shown in Figure 5, the end of the timber beam 121 and the end of the beam end 123c face each other. Multiple through holes are arranged in the beam end 123c at positions that overlap with the timber beam 121 in the extension direction (X direction) of the timber beam 121. Holes are arranged in the timber beam 121 at positions that overlap with the holes in the beam end 123c in the extension direction (X direction) of the timber beam 121. Through holes are arranged in the column 110c at positions that overlap with the through holes in the beam end 123c and the holes in the timber beam 121 in the extension direction (X direction) of the beam end 123c.
[0043] Steel rods 125 are placed in the through-holes of column 110c, beam end 123c, and timber beam 121. The steel rods 125 penetrate column 110c.
[0044] The steel rod 125 protrudes from the end of the wooden beam 121 and has a male thread at the end that penetrates the beam end 123c and the column 110c. A nut (fixing jig) 126 with a female thread is screwed onto the male thread at the end of the steel rod 125. The nut 126 joins the wooden beam 121 and the column 110c with the beam end 123c in between. The wooden beam 121 and the beam end 123c are in contact. However, it is not limited to this, and the wooden beam 121 and the beam end 123c may be spaced apart.
[0045] The wooden beam 121 is joined at both ends to the beam ends 123c via connecting structures 12c, parallel to each other. The floor slab 150 is placed on top of the wooden beam 121 and the beam ends 123c.
[0046] As described above, in one embodiment of the present invention, the joint structure 12c has a steel rod 125 that penetrates and fixes the beam end 123c and the column 110c. With this configuration, the joint structure 12c can further secure the connection between the wooden beam 121 and the beam end 123c.
[0047] <Fifth Embodiment> In this embodiment, a reinforcing member 130d with a different structure from the reinforcing member 130 described in the first embodiment will be described. Configurations identical or similar to those described in the first embodiment may be omitted from the description.
[0048] Figure 6A shows a schematic cross-sectional view of the joint structure 12, including the timber beam 121 and the beam end 123. To make the structure of the joint structure 12 easier to see, the floor slab 150 is shown as a dotted line in Figure 6A. Figure 6B shows a front view of the reinforcing member 130d. Figure 6C shows a side view of the reinforcing member 130d.
[0049] Reinforcement members 130d are placed in the holes of the wooden beam 121. The reinforcement members 130d are placed between the wooden beam 121 and the steel rod 125. The reinforcement members 130d include a first reinforcing plate 131d and a second reinforcing plate 132d inserted into the wooden beam 121 from the end of the wooden beam 121 in the extension direction (X direction) of the wooden beam 121, and a third reinforcing plate 133d connecting the first reinforcing plate 131d and the second reinforcing plate 132d. The first reinforcing plate 131d is placed on the steel rod 125 inserted into the wooden beam 121. The second reinforcing plate 132d faces the first reinforcing plate 131d with the steel rod 125 in between. The third reinforcing plate 133d has a normal to the extension direction of the beam end 123 and connects the first reinforcing plate 131d and the second reinforcing plate 132d. The third reinforcing plate 133d is provided with a through hole. A steel rod 125 is placed in the through hole of the third reinforcing plate 133d. Preferably, the steel rod 125 is placed in contact with the inner surface of the through hole of the third reinforcing plate 133d. The first reinforcing plate 131d, the second reinforcing plate 132d, and the third reinforcing plate 133d are placed in a position that overlaps with the steel rod 125 in the vertical direction (Z direction). Preferably, the first reinforcing plate 131d and the second reinforcing plate 132d are placed in contact with the inner surface of the hole in the wooden beam 121. Preferably, the horizontal width (length in the Y direction) of the first reinforcing plate 131d, the second reinforcing plate 132d, and the third reinforcing plate 133d at the end face of the wooden beam 121 is greater than the width (length in the Y direction) of the steel rod 125.
[0050] The holes in the wooden beam 121 are filled with adhesive (not shown). The adhesive is placed between the wooden beam 121 and the steel rod 125. The adhesive may also be placed between the reinforcing material 130d and the steel rod 125. The steel rod 125 is fixed to the wooden beam 121 by the adhesive within the holes in the wooden beam 121.
[0051] As described above, the joint structure 12 according to one embodiment of the present invention is provided with a reinforcing member 130d including a third reinforcing plate 133d that connects the first reinforcing plate 131d and the second reinforcing plate 132d. With this configuration, the joint structure 12 distributes the bearing pressure at the end of the wooden beam 121 by the reinforcing member 130d, further suppressing the concentration of bearing pressure and reducing the sinking of the steel rod 125. As a result, bearing pressure failure of the wooden beam 121 is prevented, and the beam 120 exhibits high shear strength.
[0052] <Sixth Embodiment> In this embodiment, a reinforcing member 130e, which has a different structure from the reinforcing member 130d described in the fifth embodiment, will be described. Configurations that are the same as or similar to those described in the first and fifth embodiments may be omitted from the description.
[0053] Figure 7A shows a schematic cross-sectional view of the joint structure 12, including the timber beam 121 and the beam end 123. To make the structure of the joint structure 12 easier to see, the floor slab 150 is shown as a dotted line in Figure 7A. Figure 7B shows a front view of the reinforcing member 130e. The side view of the reinforcing member 130e is the same as in Figure 6C and is therefore omitted here.
[0054] Reinforcement members 130e are placed in the holes of the wooden beam 121. The reinforcement members 130e are placed between the wooden beam 121 and the multiple steel rods 125. That is, multiple steel rods 125 are placed in each hole of the wooden beam 121. The reinforcement member 130e includes a first reinforcing plate 131e and a second reinforcing plate 132e inserted into the wooden beam 121 from the end of the wooden beam 121 in the extension direction (X direction) of the wooden beam 121, and a third reinforcing plate 133e connecting the first reinforcing plate 131e and the second reinforcing plate 132e. The first reinforcing plate 131e is placed on the multiple steel rods 125 inserted into the wooden beam 121. The second reinforcing plate 132e faces the first reinforcing plate 131e with the multiple steel rods 125 in between. The third reinforcing plate 133e has a normal to the extension direction of the beam end 123 and connects the first reinforcing plate 131e and the second reinforcing plate 132e. The third reinforcing plate 133e has a plurality of through holes. A plurality of steel rods 125 are arranged in the plurality of through holes of the third reinforcing plate 133e. That is, the reinforcing member 130e according to this embodiment has a configuration in which a plurality of reinforcing members 130d adjacent in the horizontal direction (Y direction) as described in the fifth embodiment are continuous. The first reinforcing plate 131e has a configuration in which the first reinforcing plate 131d is continuous, the second reinforcing plate 132e has a configuration in which the second reinforcing plate 132d is continuous, and the third reinforcing plate 133e has a configuration in which the third reinforcing plate 133d is continuous.
[0055] It is preferable that the steel rod 125 is positioned in contact with the inner surface of the through-hole in the third reinforcing plate 133e. The first reinforcing plate 131e, the second reinforcing plate 132e, and the third reinforcing plate 133e are positioned to overlap with the steel rod 125 in the vertical direction (Z direction). It is preferable that the first reinforcing plate 131e and the second reinforcing plate 132e are positioned in contact with the inner surface of the hole in the timber beam 121. It is preferable that the horizontal width (length in the Y direction) of the first reinforcing plate 131e, the second reinforcing plate 132e, and the third reinforcing plate 133e at the end face of the timber beam 121 is greater than the width (length in the Y direction) of the arrangement of the multiple steel rods 125.
[0056] The holes in the wooden beam 121 are filled with adhesive (not shown). The adhesive is placed between the wooden beam 121 and the steel rods 125. The adhesive is also placed between multiple steel rods 125. The adhesive may also be placed between the reinforcing material 130e and the steel rods 125. The multiple steel rods 125 are fixed to the wooden beam 121 by the adhesive within the holes in the wooden beam 121.
[0057] As described above, the joint structure 12 according to one embodiment of the present invention is provided with a reinforcing member 130e including a third reinforcing plate 133e that connects the first reinforcing plate 131e and the second reinforcing plate 132e. With this configuration, the joint structure 12 distributes the bearing pressure at the end of the wooden beam 121 by the reinforcing member 130e, further suppressing the concentration of bearing pressure and reducing the sinking of the steel rod 125. As a result, bearing pressure failure of the wooden beam 121 is prevented, and the beam 120 exhibits high shear strength.
[0058] The embodiments described above as examples of the present invention can be combined and implemented as appropriate, insofar as they do not contradict each other. Additions, deletions, or design modifications of components based on these embodiments, made by those skilled in the art, are also included within the scope of the present invention, as long as they retain the essence of the invention.
[0059] Any effects or benefits other than those brought about by the embodiments described above, if they are clear from the description herein or easily predictable to those skilled in the art, are naturally understood to be brought about by the present invention. [Explanation of Symbols]
[0060] 12: Joint structure, 110: Column, 120: Beam, 121: Timber beam, 123: Beam end, 124: End plate, 125: Steel rod, 126: Fixing jig, 130: Reinforcement material, 131: First reinforcement plate, 132: Second reinforcement plate, 133: Third reinforcement plate, 150: Floor slab
Claims
1. A wooden beam having holes, A beam end is provided, which is located on the end side of the wooden beam and has a through hole at a position that overlaps with the hole in the extension direction of the wooden beam, A steel rod is inserted into the through hole in the beam end and the hole in the wooden beam, and the wooden beam and the beam end are joined by a fixing jig, A reinforcing material comprising: a first reinforcing plate provided on the steel rod in contact with the inner surface of the hole; and a second reinforcing plate provided opposite the first reinforcing plate across the steel rod, separated from the first reinforcing plate, and in contact with the inner surface of the hole; A joint structure comprising the above.
2. The reinforcing material further includes a third reinforcing plate connecting the first reinforcing plate and the second reinforcing plate, The joint structure according to claim 1, wherein the steel rod penetrates the third reinforcing plate.
3. Multiple steel bars are arranged, The third reinforcing plate has a plurality of through holes, The joint structure according to claim 2, wherein each of the plurality of steel rods penetrates the plurality of through holes.
4. The joining structure according to claim 1, wherein the width of the first reinforcing plate is greater than the width of the steel rod.
5. The beam end is a steel frame structure and has an end plate at the joint surface with the wooden beam. The steel rod penetrates the end plate, The joining structure according to claim 1, wherein the wooden beam and the beam end are joined via the end plate and the fixing jig.
6. The beam end is connected to the column on the side opposite to the end plate, The steel rod penetrates the end plate and the column, The joining structure according to claim 5, wherein the wooden beam and the beam end are joined via the column and the fixing jig.
7. The beam end is a reinforced concrete structure. The aforementioned fixing jig is embedded in the reinforced concrete structure. The joining structure according to claim 1, wherein the wooden beam and the beam end are joined via the beam end and the fixing jig.
8. The beam end is a reinforced concrete structure and is connected to a column on the opposite side from the wooden beam. The steel rod penetrates the beam end and the column, The joining structure according to claim 1, wherein the wooden beam and the beam end are joined via the column and the fixing jig.
9. The joint structure according to claim 1, wherein the steel rod penetrates the wooden beam.
10. A wooden beam having holes, A beam end is provided, which is located on the end side of the wooden beam and has a through hole at a position that overlaps with the hole in the extension direction of the wooden beam, A steel rod is inserted into the through hole in the beam end and the hole in the wooden beam, and the wooden beam and the beam end are joined by a fixing jig, A reinforcing material comprising: a first reinforcing plate provided on the steel rod in contact with the inner surface of the hole; and a second reinforcing plate provided opposite the first reinforcing plate across the steel rod, separated from the first reinforcing plate, and in contact with the inner surface of the hole; A building that includes a connecting structure equipped with these features.