JP2024106840A - Joint structure of wooden pillars and steel beams - Google Patents

Abstract

To provide a joint structure of a wooden column and a steel beam that can reduce the amount of residual deformation when a building frame is plastically deformed during an earthquake.SOLUTION: In a joint structure 80 of a wood column 10 and a steel beam 20, the wooden column 10 is provided with a pair of first recesses 14 on either side of a first joint end face 11 on a steel beam side and a pair of first through holes 15 connecting an opposite end face 12 and the pair of first recesses 14, and in the steel beam 20, a pair of steel boxes 30, each of which fits into the first recesses 14 respectively, are fixed at two locations on a second joint end face 25 on the wooden column side, a first hole 35 communicating with the first through hole 15 is opened on a contact plate 32 in contact with the first recess 14 at the box 30, an access opening 33 is provided on the side of the box 30, and a tensioner 50 inserted through the first through hole 15 and the first hole 35 is fixed to a fixture 53 in contact with the contact plate 32 in a strained state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joint structure between a wooden pillar and a steel beam.

The framework that makes up a building (building framework) includes frameworks made of columns and beams of the same material, such as wooden frameworks made of wooden columns and wooden beams, and steel frameworks made of steel columns and steel beams, as well as hybrid frameworks made of wooden columns and steel beams. By using wooden columns instead of steel for both columns and beams, a building framework can be formed that has the high rigidity of steel and the various functions provided by wood. Furthermore, compared to wooden frameworks made of wooden columns and wooden beams, building frameworks have a higher plastic deformation capacity during earthquakes.

Here are some specific examples of the effects of using wood: compared to steel frames and concrete, wood is lighter, has a high specific strength, and is easy to process. It also has high insulation and moisture-regulating properties. It also has the aesthetic appeal of natural materials, and because it is made from natural materials, it produces less carbon dioxide emissions and is highly effective in reducing environmental impact.

Patent Document 1 proposes a column-beam joint structure consisting of a wooden column and a steel beam. Specifically, a beam load bearing part is provided on the column toward the center from the joint end where the column comes into contact with the beam, and a part of the beam's load is transmitted to the beam load bearing part by a joint metal that joins the column and the beam, and the beam's load is supported by the column joint end and the beam load bearing part.

In this beam-column joint structure, a column reinforcement material made of carbon fiber is attached to the outer periphery of the joint end side of the column that contacts the beam. In addition, at least one L-shaped metal joint that connects the beam and column is attached, and this L-shaped metal joint has a step so that part of the contact surface that contacts the column does not interfere with the reinforcement material.

JP 2011-256616 A

As described above, compared to existing wooden frames formed of wooden columns and wooden beams, the column-beam joint structure (hybrid frame) consisting of wooden columns and steel beams described in Patent Document 1 increases the plastic deformation capacity of the building frame during an earthquake. Meanwhile, in the column-beam joint structure consisting of wooden columns and steel beams described in Patent Document 1, the columns and beams are joined by bolting L-shaped joint metal fittings to both the wooden columns and the steel beams. In other hybrid frames, too, it is common to use a joint structure in which the columns and beams are joined by various bolts, including lag screw bolts. However, in such a structure in which the steel beams and wooden columns are joined by bolts, there is a problem that the residual deformation amount may be large when the building frame undergoes plastic deformation during an earthquake.

If the residual deformation is large, after an earthquake, the opening and closing of various openings such as doors and windows will be hindered due to factors such as the inclination of the building's floors, which will likely have a significant impact on future livability, making large-scale repairs, renovations, and maintenance necessary.

The present invention was made in consideration of the above problems, and aims to provide a joint structure between a wooden pillar and a steel beam that can reduce the amount of residual deformation when the building frame undergoes plastic deformation during an earthquake.

In order to achieve the above object, one embodiment of the joint structure between a wooden column and a steel beam according to the present invention is as follows:
A joint structure of wooden pillars and steel beams,
The wooden column is provided with a pair of first recesses on the left and right sides of a first joint end face on the steel beam side, and a pair of first through holes are provided connecting an opposite end face on the opposite side of the first joint end face and the pair of first recesses,
A pair of steel boxes are fixed to the steel beam at two locations on a second joint end face on the wooden column side, the pair of steel boxes fitting into the pair of first recesses, and a first hole communicating with the first through hole is opened in an abutment plate that abuts against the first recesses in the boxes, and an access opening is provided on a side of the boxes to freely access the inside of the boxes,
The tension member inserted through the first through hole and the first hole is fixed in a tensioned state to a fixing device abutting the abutment plate.

According to this embodiment, the wooden pillars and steel beams are connected by tensioned tendons, which increases the plastic deformation capacity of the building frame during a major earthquake compared to a wooden pillar-to-beam connection structure, for example. Furthermore, the residual deformation can be reduced compared to conventional building frame column-to-beam connection structures in which the pillars and beams are connected by bolts.

In addition, the steel box fixed to the steel beam fits into the first recess of the wooden pillar, and the box and wooden pillar are connected by a tension member inserted into the first through hole of the wooden pillar, resulting in a joint structure with high joint strength and excellent assembly properties.

Here, wooden columns include not only normal wooden columns, but also wooden wall columns. The "tension material" can be a PC (Prestressed Concrete) steel bar or PC steel wire. A sheath tube may be provided inside the through hole. The tension material can be a bonded PC pressure-bonded material using the bonded PC pressure-bonding method, in which the tension material is pressure-bonded via grout filled inside the through hole (or sheath tube), or an unbonded PC pressure-bonded material using the unbonded PC pressure-bonding method, which does not require grout filling.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
The steel beam is formed of H-shaped steel,
The first through hole is provided at the center position in the width direction of the wooden pole and is located above the web of the H-shaped steel when viewed in a plane.

According to this aspect, the steel box fixed to the steel beam made of H-shaped steel is fitted into the first recess of the wooden column, and the box and the wooden column are connected by the tension material inserted into the first through hole of the wooden column. Therefore, even if the steel beam is an H-shaped steel, the fixing part of the tension material and the web of the H-shaped steel do not interfere with each other, so the first through hole and the tension material inserted therein can be placed at the center position in the width direction of the wooden column and on the web of the H-shaped steel. This makes it unnecessary to fix the tension material to two positions on the left and right of the web of the flange in order to avoid interference with the web, for example, when fixing the tension material to the flange of a steel beam made of H-shaped steel. In addition, in the case of a wide wall column, the axial force is introduced to a total of four tension materials, two positions each of which avoids the web for the upper flange of the H-shaped steel near both ends in the longitudinal direction, and the steel beam is joined, making it even more difficult to introduce the axial force. Considering that it is not easy to introduce axial force in this way, it is preferable to be able to join the wooden column and the steel beam with a single tension member, as this improves workability (the ability to introduce axial force into the tension member).

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
Between the pair of boxes at the second joint end surface of the steel beam and at both ends in the width direction of the steel beam, a pair of steel flanges are fixed that protrude toward the wooden column, and a pair of second holes are opened at mutually corresponding positions in the pair of flanges.
A pair of second recesses into which the pair of flanges fit are provided at positions on the wooden post corresponding to the pair of flanges, and second through holes are opened at positions on the wooden post corresponding to the pair of second holes,
The pair of flanges are fitted into the pair of second recesses, respectively, and bolts are inserted into the pair of second holes and the second through holes and are tightened with nuts.

According to this aspect, a pair of steel flanges are fixed between a pair of boxes in the steel beam, protruding toward the wooden column, and the pair of flanges are fitted into a pair of second recesses in the wooden column. The pair of flanges are aligned with each other, and bolts inserted into the second holes of the pair of flanges and the second through holes in the wooden column are tightened with nuts. After the steel beam and wooden column are positioned and fixed, the wooden column and steel beam can be joined with tension members, improving workability when tensioning the tension members. Furthermore, by joining the wooden column and steel beam with bolts in addition to the tension members, the transfer of bending stress from the wooden column to the steel beam is further improved.

Another aspect of the joint structure between a wooden column and a steel beam according to the present invention is as follows:
A first joint device is formed by fixing the pair of boxes and the pair of flanges that protrude toward the wooden pole to a steel plate,
The first joint device is joined to the second joint end surface of the steel beam.

According to this aspect, by having a first joint device that is separate from the steel beam and directly joined to the wooden column, the steel beam and the first joint device can be transported to the site in a separated state and assembled on site, improving the transportability of the components.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
Between the pair of boxes at the second joint end surface of the steel beam and at the center of the width of the steel beam, a steel flange is fixed to protrude toward the wooden column, and a third hole is opened in the flange.
A third recess into which the flange fits is provided at a position on the wooden post corresponding to the flange, and a third through hole is provided at a position on the wooden post corresponding to the third hole,
The flange is fitted into the third recess, and a drift pin is inserted through the third hole and the third through hole.

According to this aspect, a steel flange that protrudes toward the wooden column is fixed between a pair of boxes in the steel beam, the flange fits into a third recess provided in the wooden column, and a drift pin is inserted into the third hole of the flange and the third through hole of the wooden column, which are aligned with each other. This allows the wooden column and the steel beam to be joined with tension members after the steel beam and the wooden column are positioned and fixed, improving workability when tensioning the tension members. Furthermore, by joining the wooden column and the steel beam with drift pins in addition to the tension members, the transfer of bending stress from the wooden column to the steel beam is further improved.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
A second connection device is formed by fixing the pair of boxes and the flanges that protrude toward the wooden pole to a steel plate,
The second joint device is joined to the second joint end surface of the steel beam.

According to this aspect, by having a second connection device that is separate from the steel beam and directly connected to the wooden column, the steel beam and the second connection device can be transported to the site in a separated state and assembled on site, improving transportability.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
The second joint end surface is an upper surface and a lower surface of the steel beam,
The wooden pillars are joined to the upper and lower parts of the steel beams.

According to this embodiment, by connecting wooden columns to both the upper and lower parts of the steel beams, the wooden columns extending to both the upper and lower floors can be connected to the steel beams with high strength, forming an upper and lower building frame with high plastic deformation capacity.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
The tension member is characterized in that it is an unbonded PC crimped material.

According to this embodiment, the tension member is an unbonded PC pressure-bonded material, which eliminates the need to place a sheath tube in the first through hole or fill it with grout, and allows the joining structure between the wooden column and the steel beam to be formed using a pressure-bonding method with excellent workability.

In another embodiment of the joint structure of the wooden column and the steel beam according to the present invention,
The wooden pillar is a wall pillar formed from any one of a plurality of square timber units, laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

According to this aspect, the wooden column is a wall column formed from one of multiple square timber units, laminated timber, solid wood, structural plywood, laminated veneer lumber, or cross-laminated timber, so that the wall column functions as a load-bearing wall even while using a wooden column. For example, by adjusting the number of square timbers or the width of LVL or CLT, etc., a wall column with the desired rigidity (earthquake resistance) can be formed.

As can be understood from the above explanation, the joint structure between wooden columns and steel beams of the present invention can reduce the amount of residual deformation when the building frame undergoes plastic deformation during an earthquake.

FIG. 2 is a perspective view showing an example of a joint structure between a wooden pillar and a steel beam according to an embodiment of the present invention in a pre-assembly state. FIG. 1 is a perspective view of an example of a joint structure between a wooden pillar and a steel beam according to an embodiment. 13A to 13C are diagrams illustrating a joining device constituting another example of a joining structure between a wooden pillar and a steel beam according to an embodiment of the present invention. 13 is a perspective view showing a pre-assembly state of yet another example of a joint structure between a wooden pillar and a steel beam according to an embodiment of the present invention. FIG. FIG. 11 is a perspective view of yet another example of a joint structure between a wooden pillar and a steel beam according to an embodiment of the present invention.

Below, several examples of joint structures between wooden columns and steel beams according to the embodiments will be described with reference to the attached drawings. Note that in this specification and the drawings, substantially identical components may be designated by the same reference numerals to avoid redundant description.

[Joint structure between wooden pillar and steel beam according to embodiment]
A number of examples of a joint structure between a wooden post and a steel beam according to an embodiment will be described with reference to Fig. 1 to Fig. 5. Here, Fig. 1 is a perspective view showing a state before assembly of an example of a joint structure between a wooden post and a steel beam according to an embodiment, and Fig. 2 is a perspective view of an example of a joint structure between a wooden post and a steel beam according to an embodiment.

As shown in FIG. 1, the joint structure 80 is a joint structure between a wooden pillar 10 and a steel beam 20. In the following, the illustrated example will be described taking an example where the wooden pillar 10 is joined above the steel beam 20, but it may be a form in which the wooden pillar 10 is joined to the underside 26 of the lower flange 23 of an H-shaped steel, which is the steel beam 20, or a form in which two wooden pillars 10 are joined to corresponding positions on the upper surface 25 of the upper flange 22 of the H-shaped steel, which is the steel beam 20, and the underside 26 of the lower flange 23.

The wooden pillar 10 is a wall pillar, and with regard to the cross-sectional dimensions perpendicular to the axial direction of the pillar, the width t1 in the wall thickness direction (width direction) is, for example, approximately the same as or greater than the wall thickness (when the thickness of the insulation material and exterior material is added, the width in the wall thickness direction can generally be greater than the wall thickness), and the width t2 in the direction perpendicular to the wall thickness is about two to several times the width t1, making it a rectangular cross-section pillar.

The wooden wall pillars 10 are made of multiple log units, laminated timber, solid wood, structural plywood, laminated veneer lumber (LVL), or cross laminated timber (CLT).

Even though wooden columns 10 are used, the wall columns function as load-bearing walls, making it possible to form a hybrid joint structure consisting of wooden columns and steel beams with excellent earthquake resistance.

The wooden pillar 10 has a pair of first recesses 14 on the left and right sides of the first joint end face 11 on the steel beam 20 side. In addition, a pair of first through holes 15 are provided near the left and right ends of the wooden pillar 10, connecting the opposite end face 12 on the opposite side to the first joint end face 11 and the pair of first recesses 14. More specifically, the first through holes 15 are provided in the center position (position t1/2) of the width t1 of the wooden pillar 10.

A pair of second recesses 16 are provided at the center of the pair of first recesses 14 on the pair of wide surfaces 13 of the wooden pole 10. A plurality of second through holes 17 (two in the illustrated example) are provided inside the wooden pole 10, penetrating between the pair of second recesses 16.

On the other hand, the steel beam 20 is formed from an H-shaped steel having a web 21, an upper flange 22, and a lower flange 23.

A pair of steel boxes 30 that fit into a pair of first recesses 14 in the wooden pillar 10 are welded to two locations on the second joint end surface 25 (upper surface) of the upper flange 22 of the steel beam 20 on the wooden pillar 10 side.

The box 30 is a hollow hexahedron, and includes a housing 31 with two adjacent sides open, and an abutment plate 32 that closes one open side of the housing 31, with the open side being an access opening 33 through which an operator can insert his or her hand. In the illustrated example, the abutment plate 32 is welded to the housing 31, but the abutment plate 32 may be molded integrally with the housing 31.

A first hole 35 is provided in the contact plate 32 at a position that communicates with the first through hole 15 when the box 30 fits into the first recess 14 in the X1 direction.

In addition, a pair of steel flanges 40 are welded between the pair of boxes 30 at the second joint end surface 25 of the steel beam 20 and at both ends of the width of the steel beam 20, and protrude toward the wooden column 10.

A pair of second holes 42 (two pairs of second holes 42 in total, four second holes 42 in total, are provided at positions in each flange 40 that communicate with each second through hole 17 when the flange 40 is fitted into the second recess 16 in the X2 direction.)

When assembling the joining structure 80, first, as shown in FIG. 1, the two boxes 30 are fitted into the corresponding first recesses 14 in the X1 direction, and at the same time, the two flanges 40 are fitted into the corresponding second recesses 16 in the X2 direction.

Next, the bolt 60 is inserted in the X3 direction through the second through hole 17 and the pair of second holes 42 that communicate with each other, and then tightened with the nut 62 to temporarily fix the wooden column 10 and the steel beam 20.

Next, the tendon 50 is inserted in the X4 direction from above the first through hole 15, and the fixing device 53 is inserted in the X5 direction from the access opening 33 of the box 30, and the fixing device 53 is attached to the lower end of the tendon 50 and abutted against the abutment plate 32. Here, a PC steel bar is applied to the tendon 50.

Next, the upper end of the tension member 50 is tensioned above the opposite end face 12 of the wooden pole 10, and the upper end of the tension member 50 in the tensioned state is fixed to the opposite end face 12 via the fixing device 52, by applying the unbonded PC crimping method, thereby forming the joint structure 80 shown in FIG. 2.

The wooden pillar and steel beam joint structure 80 is a joint structure in which the wooden pillar 10 and the steel beam 20 are joined by tensioned tendons 50 using the unbonded PC pressure bonding method, so the plastic deformation capacity of the building frame during a major earthquake is higher than that of a wooden pillar and wooden beam joint structure. In addition, the residual deformation can be reduced compared to a conventional building frame structure in which the pillar and beam are simply joined with bolts.

In addition, the steel box 30 fixed to the steel beam 20 is fitted into the first recess 14 of the wooden pillar 10, and the box 30 and the wooden pillar 10 are connected by the tension member 50 inserted into the first through hole 15 of the wooden pillar 10, resulting in a joint structure 80 with high joint strength and excellent assembly properties.

In addition, when the steel box 30 fixed to the steel beam 20 formed of H-shaped steel is fitted into the first recess 14 of the wooden column 10, the box 30 and the wooden column 10 are connected by the tension member 50 inserted into the first through hole 15 of the wooden column 10. This eliminates interference between the fixing portion (fixing device 53) of the tension member 50 and the web 21 of the H-shaped steel 20, even if the steel beam 20 is an H-shaped steel as in the illustrated example. Therefore, the first through hole 15 and the tension member 50 inserted therein can be positioned at the center position in the width direction of the wooden column 10, on the web 21 of the H-shaped steel 20. This makes it unnecessary to fix the tension member at two points, on the left and right positions of the web on the upper flange, to avoid interference with the web, as in the conventional structure in which the tension member is directly fixed to the upper flange of the steel beam made of H-shaped steel.

For example, when joining a wide wall column 10 to a steel beam 20 as in the illustrated example, if the lower ends of the tendons are fixed directly to the upper flange, axial force must be introduced to a total of four tendons (two on each side of the wall column 10) to join the steel beam, making the introduction of axial force difficult. In contrast, with the joining structure 80, it is sufficient to introduce axial force to a total of two tendons (one on each side) to join the steel beam 20, improving workability (ability to introduce axial force into each tendon 50).

In addition, when introducing axial force into the tension member 50, the steel beam 20 and the wooden column 10 are temporarily fixed by the bolts 60 via a pair of flanges 40 fitted into a pair of second recesses 16, so the tension member 50 can be tensioned in a stable state, improving workability when tensioning the tension member 50.

Furthermore, since the wooden pillar 10 and the steel beam 20 are joined by the bolts 60 in addition to the tension members 50, the transmission of bending stress from the wooden pillar 10 to the steel beam 20 is further improved.

Although not shown in the figures, the steel beam 20 may not have a pair of flanges 40, and the wooden column 10 and the steel beam 20 may not be temporarily fixed with the bolts 60. In this configuration, the wooden column 10 and the steel beam 20 cannot be temporarily fixed with the bolts 60, but it is not necessary to process the second recess 16 or the second through hole 17 in the wooden column 10, and it is not necessary to attach the pair of flanges 40 to the steel beam 20, which improves the manufacturability of each component.

Next, referring to FIG. 3, another example of a joint structure between a wooden pillar and a steel beam according to an embodiment will be described. Here, FIG. 3 is a diagram illustrating a joint device constituting another example of the joint structure.

The joint structure 80 shown in Figures 1 and 2 is a configuration in which a box 30 and a pair of flanges 40 are directly joined to a steel beam 20, but the example shown in Figure 3 differs from the joint structure 80 in that a first joint device 70 equipped with these components is assembled to the steel beam 20 on-site.

The first joining device 70 is formed by fixing a pair of boxes 30 and a pair of flanges 40 that protrude toward the wooden pole 10 to a steel plate 71.

The plate 71 has multiple bolt holes 72, and bolt holes 28 are also opened at positions corresponding to the bolt holes 72 in the upper flange 22 of the steel beam 20. A bolt 75 is inserted through the access opening 33 of the box 30, and the bolt 75 is inserted into the corresponding bolt holes 72, 28 and tightened with a nut 76, thereby fixing the first connecting device 70 to the steel beam 20.

Then, the joint structure between the wooden columns and steel beams is formed using the unbonded PC pressure bonding method already explained.

According to the illustrated embodiment, the first joint device 70 is separate from the steel beam 20 and directly joined to the wooden column 10. This allows the steel beam 20 and the first joint device 70 to be transported to the site in a separate state and assembled on site, improving the transportability of the components. In addition, it is possible to achieve various effects similar to those of the joint structure 80 shown in FIG. 2.

Next, with reference to Figures 4 and 5, a further example of a joint structure between a wooden post and a steel beam according to an embodiment will be described. Here, Figure 4 is a perspective view showing a state before assembly of the further example of a joint structure between a wooden post and a steel beam according to an embodiment, and Figure 5 is a perspective view of the further example of a joint structure between a wooden post and a steel beam according to an embodiment.

The illustrated joint structure 90 differs from joint structure 80 in that a single steel flange 40A is fixed to the center of the width of the second joint end face 25 of the steel beam 20, protruding toward the wooden column 10, and a third recess 18 into which the flange 40 fits is provided at a position on the wooden column 10 corresponding to the flange 40A.

A third hole 43 is provided in the flange 40A, and a third through hole 19 is provided at a position corresponding to the third hole 43 in the wooden post 10.

When assembling the joining structure 80A, as shown in FIG. 4, the two boxes 30 are fitted into the corresponding first recesses 14 in the X1 direction, and at the same time, the flange 40A is fitted into the third recess 18 in the X6 direction.

Next, the drift pin 65 is inserted in the X7 direction through the third through hole 18 and the third hole 43, which are connected to each other, to temporarily fix the wooden column 10 and the steel beam 20.

Then, the unbonded PC pressure bonding method already described is used to form the joint structure 90 between the wooden column and the steel beam shown in Figure 5.

Although not shown in the figure, the box 30 and flange 40A may be fixed to a steel plate, and the second connecting device may be assembled to the steel beam 20 on-site.

Note that the configurations described in the above embodiments may be combined with other components, and the present invention is not limited to the configurations shown here. In this regard, changes can be made without departing from the spirit of the present invention, and can be determined appropriately according to the application form.

10: Wooden pillar 11: First joint end surface 12: Opposite end surface 13: Wide surface 14: First recess 15: First through hole 16: Second recess 17: Second through hole 18: Third recess 19: Third through hole 20: Steel beam (H-shaped steel)
21: Web 22: Upper flange 23: Lower flange 25: Second joining end surface (upper surface)
26: Underside 30: Box 31: Housing 32: Abutment plate 33: Access opening 35: First hole 40, 40A: Flange 42: Second hole 43: Third hole 50: Tendon 52, 53: Fixing device 60: Bolt 62: Nut 65: Drift pin 70: First joining device 71: Plate 72: Bolt hole 75: Bolt 76: Nut 80, 90: Joint structure (joint structure between wooden column and steel beam)

Claims (9)

A joint structure of wooden pillars and steel beams,
The wooden column is provided with a pair of first recesses on the left and right sides of a first joint end face on the steel beam side, and a pair of first through holes are provided connecting an opposite end face on the opposite side to the first joint end face and the pair of first recesses,
A pair of steel boxes are fixed to the steel beam at two locations on a second joint end face on the wooden column side, the pair of steel boxes fitting into the pair of first recesses, and a first hole communicating with the first through hole is opened in an abutment plate that abuts against the first recesses in the boxes, and an access opening is provided on a side of the boxes to freely access the inside of the boxes,
A joint structure between a wooden column and a steel beam, characterized in that the tension material inserted into the first through hole and the first hole is fixed in a tensioned state to a fixing device abutting the abutment plate. The steel beam is formed of H-shaped steel,
The joint structure between a wooden pillar and a steel beam as described in claim 1, characterized in that the first through hole is provided at a central position in the width direction of the wooden pillar and is located above the web of the H-shaped steel when viewed in a plane. Between the pair of boxes at the second joint end surface of the steel beam and at both ends in the width direction of the steel beam, a pair of steel flanges are fixed that protrude toward the wooden column, and a pair of second holes are opened at mutually corresponding positions in the pair of flanges.
A pair of second recesses into which the pair of flanges fit are provided at positions on the wooden post corresponding to the pair of flanges, and second through holes are opened at positions on the wooden post corresponding to the pair of second holes,
The joining structure between a wooden pillar and a steel beam as described in claim 1 or 2, characterized in that the pair of flanges are fitted into the pair of second recesses, respectively, and bolts are inserted into the pair of second holes and the second through holes and tightened with nuts. A first joint device is formed by fixing the pair of boxes and the pair of flanges that protrude toward the wooden pole to a steel plate,
The joint structure between a wooden pole and a steel beam according to claim 3, characterized in that the first joint device is joined to the second joint end surface of the steel beam. Between the pair of boxes at the second joint end surface of the steel beam and at the center of the width of the steel beam, a steel flange is fixed to protrude toward the wooden column, and a third hole is opened in the flange.
A third recess into which the flange fits is provided at a position on the wooden post corresponding to the flange, and a third through hole is provided at a position on the wooden post corresponding to the third hole,
3. The joining structure between a wooden pillar and a steel beam according to claim 1 or 2, characterized in that the flange fits into the third recess, and a drift pin is inserted into the third hole and the third through hole. A second connection device is formed by fixing the pair of boxes and the flanges that protrude toward the wooden pole to a steel plate,
The wooden pillar and steel beam joint structure according to claim 5, characterized in that the second joint device is joined to the second joint end surface of the steel beam. The second joint end surface is an upper surface and a lower surface of the steel beam,
3. The joint structure of a wooden pillar and a steel beam according to claim 1, wherein the wooden pillar is joined to the upper and lower parts of the steel beam. The joint structure between a wooden column and a steel beam according to claim 1 or 2, characterized in that the tension member is an unbonded PC pressure-bonded material. The joint structure between a wooden column and a steel beam according to claim 1 or 2, characterized in that the wooden column is a wall column formed from one of a plurality of square timber units, laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

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