Wooden column unit, and connection structure between wooden column unit and steel beam

Abstract

To provide a wooden column unit with high rigidity, and a connection structure between the wooden column unit and a steel beam of which a connection part connecting the wooden column unit and the steel beam has high strength.SOLUTION: A wooden column unit 50 bolt-connected to a steel beam 60 comprises: a wooden column 10; steel boxes 20 arranged on cut-out parts 15 in four corner parts of the wooden column 10; tendon members 30 inserted into through holes 17 connecting two steel boxes 20 positioned at an upper part and a lower part, respectively, wherein the steel box 20 is provided with a pair of upper and lower plates 21, 22 and a plurality of side plates 23 connecting the pair of plates, first holes 26 into which the tendon members 30 are inserted are arranged on one of the upper and lower plates 21, second holes 27 into which bolts 68 are inserted upon bolt-connection to the steel beam 60 are arranged on the other one of the upper and lower plates 22, access openings 25 are arranged at middle points on the plurality of side plates 23, end parts 32 of the tendon members 30 are inserted into the first holes 26 of the steel boxes 20 positioned at the upper part and the lower part, and the tendon members 30 are fixed on fixation tools 35 in a strained state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wooden column unit and a joining structure between a wooden column unit and a steel beam.

Background Art

[0002] In the structure (building structure) that constitutes a building, in addition to a structure composed of columns and beams of the same material, such as a wooden structure formed by wooden columns and wooden beams, or a steel structure formed by steel columns and steel beams, there is also a structure of a hybrid structure (hybrid structure) formed by wooden columns and steel beams. Instead of making both the columns and beams of steel construction, by applying wooden columns, a building structure with high rigidity due to steel and various effects achieved by wood can be formed. Also, compared to a wooden structure formed by wooden columns and wooden beams, the plastic deformation ability of the building structure during an earthquake is increased.

[0003] To give a specific example of the action effect when applying wood, wood is lighter than steel, concrete, etc., has a high specific strength, is excellent in workability, and in addition, has high heat insulation and a humidity control effect. Also, it has an appearance design property created by natural materials, and furthermore, due to being a natural material, the carbon dioxide emission is small and the reduction effect on the environmental impact load is high.

[0004] Here, Patent Document 1 proposes a joining structure of a column and a beam composed of a wooden column and a steel beam. Specifically, among the columns, a beam load bearing part is provided on the central side from the joining end part in contact with the beam, and a part of the load of the beam is transmitted to the beam load bearing part by a joining metal fitting that joins the column and the beam, and it is a column-beam joining structure that supports the load of the beam at the joining end part of the column and the beam load bearing part.

[0005] In this column-beam joining structure, a column reinforcing material made of carbon fiber is attached to the outer periphery on the joining end part side in contact with the beam in the column. Further, at least one or more L-shaped joining metal fittings that join the beam and the column are attached, and a step is provided in this L-shaped joining metal fitting so that a part of the contact surface in contact with the column does not interfere with the reinforcing material.

Prior Art Documents

Patent Document

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] As described above, compared with a wooden structure formed by existing wooden columns and wooden beams, according to the column - beam joint structure (hybrid structure) composed of wooden columns and steel beams described in Patent Document 1, the plastic deformation capacity of the building structure during an earthquake is increased. By the way, in the column - beam joint structure composed of wooden columns and steel beams described in Patent Document 1, the joint between the column and the beam is achieved by bolt - joining an L - shaped joint metal to both the wooden column and the steel beam. Since the strength of the joint between the column and the beam can greatly depend on the strength of the L - shaped joint metal, there is room for improvement regarding the strength of the joint between the column and the beam.

[0008] Also, since it is a structure for joining a wooden column and a steel beam, it is necessary to improve the rigidity of the wooden column to match the rigidity of the steel beam, but there is no description regarding this in Patent Document 1.

[0009] The present invention has been made in view of the above problems, and regarding the joint structure between a wooden column unit and a steel beam and the wooden column unit forming this joint structure, it aims to provide a wooden column unit with high strength at the joint part where the wooden column unit and the steel beam are joined and high rigidity, and a joint structure between this wooden column unit and the steel beam.

Means for Solving the Problems

[0010] To achieve the above object, one aspect of the wooden column unit according to the present invention is a wooden column unit bolt - joined to a steel beam, a rectangular parallelepiped - shaped wooden column, a steel box disposed in each notch at the four corner portions of the wooden column, It has a tension member inserted through a through-opening connecting the two steel boxes above and below in the wooden column. The steel box includes a pair of upper and lower plates and a plurality of side plates connecting the pair of upper and lower plates. A first hole through which the tension member is inserted is formed in one of the pair of upper and lower plates, and a second hole through which a bolt is inserted when bolted to the steel frame beam is formed in the other of the pair of upper and lower plates. An access opening for accessing the inside of the steel box is provided in the middle of the plurality of side plates. The end of the tension member is inserted through the respective first holes of the upper and lower steel boxes, and is fixed to a fixture inside each of the steel boxes in a state where the tension member is tensioned.

[0011] According to this aspect, steel boxes are arranged in respective notches at the four corner portions of the wooden column, and the wooden column and the steel frame beam are joined via a steel box having higher rigidity than an L-shaped joint metal by being bolted to the steel frame beam by bolts inserted through the second holes of the steel boxes. Therefore, the strength of the joint portion between the two can be increased. Further, in a state where the tension member inserted through the through-opening inside the wooden column is tensioned, the end portion thereof is fixed to a fixture inside the upper and lower steel boxes, so that a compressive force is applied from the tensioned tension member to the wooden column, and the rigidity of the wooden column can be increased.

[0012] Here, as an example, a form in which one tension member is arranged for each through-opening between the upper and lower pairs of left and right steel boxes, and a total of two tension members are provided, or a form in which a plurality (for example, two) of tension members are arranged for each of a plurality (for example, two) of through-openings, and a total of four tension members are provided can be cited. Further, the "through-opening" includes both a through-hole extending between a pair of upper and lower notches and a through-groove provided from the wide surface or side surface (narrow surface) of the wooden column to the inside and extending between the pair of upper and lower notches.

[0013] In addition, one or more access openings are provided in the middle of a plurality of side plates of the steel box, so that the fasteners can be transferred into the steel box through the access openings and attached to the ends of the tension members. Further, an operator can manually tighten the fasteners inside the steel box through the access openings.

[0014] Here, the "wooden column" includes wooden wall studs in addition to ordinary wooden columns. Also, for the "tension member", PC (Prestressed Concrete) steel bars, PC steel wires, etc. can be applied. Further, a sheath pipe may be provided inside the through-opening. Furthermore, as the tension member, a bonded PC pressure-bonded material by a bonded PC pressure-bonding method in which the tension member is pressure-bonded through grout filled inside the through-opening (or sheath pipe), or an unbonded PC pressure-bonded material by an unbonded PC pressure-bonding method that does not require grout filling can be applied.

[0015] In another aspect of the wooden column unit according to the present invention, the planar shape of the steel box is rectangular, characterized in that the arrangement of the access openings in the side plates is set in a symmetric relationship with respect to the center line of the rectangle.

[0016] According to this aspect, since the arrangement of the access openings in the side plates of the steel box having a rectangular planar shape is set in a symmetric relationship with respect to the center line of the rectangle, the left-right difference in the rigidity of the steel box is eliminated, and it is possible to suppress the occurrence of structural weak parts or stress concentration in the steel box.

[0017] Here, the "symmetric relationship with respect to the center line of the rectangle" means that, regardless of which of the two orthogonal sides is taken as the center line, the left and right are in a symmetric relationship.

[0018] In another aspect of the wooden column unit according to the present invention, In the upper and lower plates of the pair of upper and lower plates where the second hole is provided, a third hole is further provided at a position corresponding to the first hole. The third hole is a hole for introducing a tension force into the tension member, characterized in that a tension bar extending from tension equipment installed outside the steel box is inserted through the third hole, and inside the steel box, the end of the tension bar and the tension member are connected by a mechanical joint.

[0019] According to this aspect, a third hole is further provided at a position corresponding to the first hole of the other upper and lower plates on one of the upper and lower plates where the second hole is provided. A tension bar extending from tension equipment installed outside the steel box is inserted through the third hole. Inside the steel box, the end of the tension bar and the tension member are connected by a mechanical joint. By introducing a tension force into the tension member, it becomes possible to introduce a large tension force into the tension member using the tension equipment without increasing the size of the steel box. For example, when the size of the steel box is not so large, the size of the access opening is not large either. Therefore, the introduction of the tension force into the tension member is achieved by manual tightening through the access opening, and it is difficult to introduce a large tension force. If tension equipment is installed inside the steel box, the size of the steel box will naturally increase. In contrast, according to this aspect, it is possible to introduce a large tension force into the tension member using the tension equipment without increasing the size of the steel box, and it becomes possible to apply an even larger compressive force to the wooden pillar.

[0020] Another aspect of the wooden pillar unit according to the present invention is characterized in that the tension member is an unbonded PC crimping material.

[0021] According to this aspect, since the tension member is an unbonded PC crimping material, the arrangement of the sheath pipe and the filling of grout with respect to the through-opening are not required, and the wooden pillar unit can be manufactured by a crimping method with excellent workability.

[0022] Also, in another aspect of the wooden pillar unit according to the present invention, the first hole is provided at the center position of the thickness of the wooden pillar and at the center position of the width of the steel box.

[0023] According to this aspect, since the first hole through which the end portion of the tension member is inserted is formed at the center position of the thickness of the wooden column and at the center position of the width of the steel box, a plurality of tension members in a tensioned state can be arranged at the center position of the thickness of the wooden column, and a compressive force can be effectively applied to the entire area of the wooden column.

[0024] Also, in another aspect of the wooden column unit according to the present invention, the wooden column is characterized in that it is a wall column formed by any one of a unit of a plurality of square timbers, glued laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

[0025] According to this aspect, since the wooden column is a wall column formed by any one of a unit of a plurality of square timbers, glued laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber, the wall column functions as a shear wall while applying the wooden column. For example, by adjusting the number of square timbers or the width of laminated veneer lumber (LVL) or cross-laminated timber (CLT), etc., a wall column with desired rigidity (seismic resistance) can be formed.

[0026] Also, one aspect of the joint structure between the wooden column unit and the steel beam according to the present invention is characterized in that the wooden column unit is arranged with respect to at least one of the upper steel beam and the lower steel beam, and the steel beam and the wooden column unit are bolted together.

[0027] According to this aspect, since at least one of the upper steel beam and the lower steel beam and the wooden column unit are bolted together, a joint structure with high strength at the joint between the steel beam and the wooden column unit and including a highly rigid wooden column unit can be formed.

[0028] Here, "at least one of the upper steel beam and the lower steel beam is bolted to the wooden column unit" includes forms in which the wooden column unit is bolted to both the upper steel beam and the lower steel beam, forms in which the upper steel beam is bolted to the wooden column unit and the lower part of the wooden column unit is joined to a concrete foundation or the like with anchor bolts, and the like.

Advantages of the Invention

[0029] As can be understood from the above description, according to the wooden column unit of the present invention and the joining structure between the wooden column unit and the steel beam, it is possible to provide a wooden column unit with high strength at the joint where the wooden column unit and the steel beam are joined and high rigidity, and a joining structure between this wooden column unit and the steel beam.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0031] Hereinafter, an example of a wooden column unit according to an embodiment and an example of a joining structure between the wooden column unit and a steel beam will be described with reference to the accompanying drawings. In the present specification and the drawings, substantially the same components may be denoted by the same reference numerals, and redundant descriptions may be omitted.

[0032] [Wooden Column Unit According to Embodiment, and Joining Structure between Wooden Column Unit and Steel Beam] With reference to FIGS. 1 to 7, an example of a wooden column unit according to an embodiment and an example of a joining structure between the wooden column unit and a steel beam will be described. Here, FIG. 1 is a front view of an example of a wooden column unit according to an embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, showing the lower part when the wooden column unit is cut at an intermediate position of the steel box. Further, FIG. 3 is a perspective view of an example of the steel box, and FIG. 4 is a diagram for explaining a method of tensioning a tension member by a tensioning device arranged outside the steel box. Furthermore, FIG. 7 is a front view of an example of a joining structure between the wooden column unit and the steel beam according to the embodiment, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 7, showing the upper part when the wooden column unit is cut at an intermediate position of the steel box.

[0033] As shown in FIG. 1, the wooden column unit 50 has a rectangular parallelepiped-shaped wooden column 10. Rectangular parallelepiped-shaped notches 15 are provided at four corner portions of the wooden column 10, and steel boxes 20 are disposed in the respective notches 15.

[0034] The wooden column 10 is a wall column. Regarding the cross-sectional dimensions shown in FIG. 2 orthogonal to the axial direction of the column, the width t2 in the wall thickness direction (width direction) has a width that is, for example, substantially the same as the wall thickness or larger than the wall thickness (when the thicknesses of the heat insulating material and the exterior material are added, the width in the wall thickness direction can generally be larger than the wall thickness), and the width t1 in the direction orthogonal to the wall thickness (see FIG. 1) is a rectangular cross-section with a width that is about 2 to several times the width t2 in the wall thickness direction, and is a column with a wide wide surface 14.

[0035] The above-described rectangular parallelepiped-shaped notches 15 are provided at the four corner portions formed by the upper end surface 11, the lower end surface 12, and the left and right side surfaces 13, respectively.

[0036] The wooden column 10 which is a pilaster is formed by any one of a unit of a plurality of corner timbers (log timbers), glued laminated timber, solid wood, structural plywood, laminated veneer lumber (LVL), or cross-laminated timber (CLT).

[0037] So as to straddle a pair of upper and lower notches 15 on the left and right, two through openings 17 (a total of four through openings 17) are respectively provided at the central position in the wall thickness direction. Here, the through opening 17 shown in FIG. 1 is a through hole.

[0038] As shown in FIG. 3, the steel box 20 has an outer shape complementary to the notch 15 provided in the wooden column 10, the planar shape is rectangular, and it includes a pair of upper and lower plates 21, 22 and three side plates 23. An access opening 25 that allows access to the inside of the steel box 20 is provided at an intermediate position of the side plate 23.

[0039] Different from the sheet-like connecting metal fittings such as the L-shaped connecting metal fitting described in the above Patent Document 1, the steel box 20 has a box shape, and thus becomes a joining member with high rigidity. Here, the steel box 20 may be integrally manufactured by casting or the like, or may be manufactured by welding and joining each plate made of flat steel to each other.

[0040] In a state where the steel box 20 is disposed in the notch 15, a first hole 26 is opened at a position corresponding to the two through holes 17 in the lower upper plate 22 of the steel box 20.

[0041] In the upper notch 15, the steel box 20 is disposed in the posture shown in FIG. 3, and in the lower notch 15, the steel box 20 shown in FIG. 3 is disposed in a posture that is vertically inverted.

[0042] As shown in FIG. 3, the first hole 26 is opened at the central position (t2 / 2) of the width t2 of the steel box 20. Therefore, as shown in FIG. 2, in a state where the steel box 20 is disposed in the notch 15, it is disposed at the central position of the thickness of the wooden column 10.

[0043] In the steel box 20 disposed in the upper notch 15, as shown in FIG. 3, a plurality (six in the illustrated example) of second holes 27 through which bolts 68 are inserted are formed in the upper upper and lower plates 21 when bolted to the steel frame beam 60 (see FIG. 7). Further, a third hole 28 is formed at a position (vertically upper position) corresponding to the first hole 26 in the upper upper and lower plates 21.

[0044] As shown in FIGS. 1 and 2, the end portions 32 of the tension members 30 inserted through the through holes 17 are inserted into the respective first holes 26 of the upper and lower steel boxes 20, and the tension members 30 are fixed to the steel boxes 20 by the fixtures 35 inside the steel boxes 20 in a tensioned state, whereby a wooden column unit 50 in which the wooden column 10 and the four steel boxes 20 at the corner portions are integrated is manufactured. Here, the manufacture of the wooden column unit 50 is performed in a factory, a fabrication yard at the site, etc., the wooden column unit 50 is erected at the site, and the steel frame beam 60 (see FIG. 7) is joined to the wooden column unit 50.

[0045] Here, as a method of introducing a tension force into the tension member 30, for example, the fixture 35 in the lower steel box 20 is attached to the lower end portion 32 of the tension member 30, the end portion 32 of the tension member 30 in the upper steel box 20 is tensioned, and the fixture 35 is attached to the end portion 32.

[0046] At this time, as shown in FIG. 4, a tension device J such as a center hole jack (an example of a tension jack) is installed at a position corresponding to the third hole 28 in the upper and lower plates 21 above the steel box 20. A tension bar B extending downward from the tension device J is disposed inside the steel box 20 through the third hole 28, and the end of the tension bar B and the end 32 of the tension member 30 are connected by a mechanical joint C such as a coupler. The tension device J is operated to tension the tension member 30 in the X1 direction with a predetermined tension, and a fixing tool 35 is attached to the end 32 of the tension member 30 for fixing. In each steel box 20, this tensioning operation is sequentially performed on the two tension members 30. Note that in the steel box 20 disposed in the lower notch 15, since the tension device J is installed outside thereof and the tension member 30 is not tensioned, the third hole 28 does not necessarily need to be opened.

[0047] The tension member 30 in the illustrated example is an unbonded PC crimping material, and is installed by an unbonded PC crimping method that eliminates the need for the arrangement of the sheath pipe and the filling of grout with respect to the through hole 17, and thus is crimped with excellent workability. Note that a bonded PC crimping method in which the tension member is crimped through the grout filled inside the through hole 17 may be applied.

[0048] As described above, the third hole 28 at a position corresponding to the first hole 26 through which the end 32 of the tension member 30 is inserted functions as a tension introduction hole for introducing a tension force into the tension member 30 using the tension device J disposed outside the steel box 20. The third hole 28 is opened at a position corresponding to the first hole 26 of the lower upper and lower plate 22 in the upper upper and lower plate 21. The tension bar B extending from the tension device J installed outside the steel box 20 is inserted through the third hole 28, and inside the steel box 20, the tension bar B and the end 32 of the tension member 30 are connected by a mechanical joint C. By introducing a tension force into the tension member 30, it becomes possible to introduce a large tension force into the tension member 30 using the tension device J without increasing the dimensions of the steel box 20.

[0049] For example, when the dimensions of the steel box 20 are not so large, the size of the access opening 25 is also not large. Therefore, the introduction of the tension force to the tension member 30 will be by manual tightening through the access opening 25, and it is difficult to introduce a large tension force. Thus, if an attempt is made to install tension equipment inside the steel box, the dimensions of the steel box will naturally become large.

[0050] On the other hand, by applying the steel box 20 provided with the third hole 28 corresponding to the first hole 26 as in the illustrated example, without increasing the size of the steel box 20, it is possible to introduce a large tension force to the tension member using the tension equipment J, and it becomes possible to apply an even larger compressive force to the wooden pillar 10.

[0051] Here, when there is no need to introduce a large tension force to the wooden pillar 10, the tension force can be introduced by manual tightening through the access opening 25 of the steel box 20.

[0052] The through-opening 17 provided in the wooden pillar 10 is a through-hole as in the illustrated example, but the through-opening may also be through-grooves 17A and 17B as shown in FIG. 5. Specifically, as shown in FIG. 5(a), the through-groove 17A dug from one wide surface 14 of the wooden pillar 10 to the arrangement position of the corresponding tension member 30 extends across the upper and lower notches 15.

[0053] Also, as shown in FIG. 5(b), the through-grooves 17A dug from the two wide surfaces 14 of the wooden pillar 10 to the arrangement position of the corresponding tension member 30 extend across the upper and lower notches 15.

[0054] Furthermore, as shown in FIG. 5(c), the through-grooves 17B dug from the side surface 13 (narrow side surface) of the wooden pillar 10 to the arrangement positions of the two tension members 30 extend across the upper and lower notches 15.

[0055] Next, referring to FIG. 6, various examples of the steel box will be described. Here, FIGS. 6(a) to (i) are all diagrams for explaining examples of the steel box, and are views looking downward after cutting the steel box at an intermediate position. Note that each figure shows a state in which the fixing tool 35 is fixed to the lower upper and lower plates 22.

[0056] The steel box 20 shown in FIG. 6(a) is the steel box 20 shown in FIGS. 1 to 3, and has an access opening 25 on its front surface.

[0057] The steel box 20A shown in FIG. 6(b) has an access opening 25 on its side surface (the right side surface in the illustrated example).

[0058] The steel box 20B shown in FIG. 6(c) has two access openings 25 with a reinforcing side plate 23A sandwiched between them on its front surface.

[0059] The steel box 20C shown in FIG. 6(d) includes a pair of left and right side plates 23 and a rear side plate 23, further includes a middle plate 24 parallel to the side plates 23 at the central position of the left and right side plates 23, and has two access openings 25.

[0060] The steel box 20D shown in FIG. 6(e) has two access openings 25 with a reinforcing middle plate 24A sandwiched between them on its front surface.

[0061] The steel box 20E shown in FIG. 6(f) includes a pair of U-shaped side plates 23B on the left and right, a pair of reinforcing side plates 23A at the central positions of the front and rear, and a total of four access openings 25 on the front and rear.

[0062] The steel box 20F shown in Fig. 6(g) has a middle plate 24 parallel to the side plates 23 at the central positions of a pair of left and right side plates 23, and has a total of four access openings 25 with three side plates 23 and the middle plate 24 that are parallel to each other. As shown in the figure, in the steel box 20F, the arrangement of the access openings 25 in the side plates 23 and the middle plate 24 is set to be symmetric about both the X-axis and the Y-axis, which are the center lines of the rectangle. Therefore, the left-right difference in rigidity of the steel box 20F is eliminated, and the occurrence of structural weak parts and stress concentration in the steel box 20F can be suppressed.

[0063] The steel box 20G shown in Fig. 6(h) has two reinforcing middle plates 24A parallel to the side plates 23 at the central positions of a pair of left and right side plates 23, and has a total of four access openings 25 with two side plates 23 and the two reinforcing middle plates 24 that are parallel to each other. Similar to the steel box 20F, in the steel box 20G, the arrangement of the access openings 25 in the side plates 23 and the reinforcing middle plates 24A is set to be symmetric about both the X-axis and the Y-axis, which are the center lines of the rectangle. Therefore, there is no left-right difference in rigidity in the steel box 20G.

[0064] The steel box 20H shown in Fig. 6(i) has reinforcing side plates 23A at the central positions of the front and back surfaces of a pair of left and right side plates 23, and has a total of four access openings 25 with two side plates 23 and the two reinforcing side plates 23A. Similar to the steel boxes 20F and 20G, in the steel box 20H, the arrangement of the access openings 25 in the side plates 23 and the reinforcing side plates 23A is set to be symmetric about both the X-axis and the Y-axis, which are the center lines of the rectangle. Therefore, there is no left-right difference in rigidity in the steel box 20H.

[0065] In this way, there can be various forms of steel boxes. In particular, by applying the steel boxes 20F, 20G, and 20H, since there is no left-right difference in rigidity and the occurrence of structural weak parts and stress concentration can be suppressed, it is preferable.

[0066] For example, a wooden column unit 50 manufactured at a factory and transported to the site is erected on site as shown in FIGS. 7 and 8. Then, the upper steel frame beam 60 is aligned with the wooden column unit 50, and the upper two steel boxes 20 and the steel frame beam 60 are bolted together to form a joint structure 70 between the wooden column unit and the steel frame beam.

[0067] Here, when there is a lower steel frame beam (not shown) below the wooden column unit 50, the lower two steel boxes 20 and the lower steel frame beam are bolted together. When there is a concrete foundation (not shown), the lower two steel boxes 20 and the concrete foundation are joined by anchor bolts.

[0068] The steel frame beam 60 is made of an H-shaped steel having a web 61, an upper flange 62, and a lower flange 63. The lower flange 63 of the steel frame beam 60 abuts on the upper surface of the upper and lower plates 21 above the two steel boxes 20. High-strength bolts 68 are inserted through the second holes 27 of each of the upper and lower plates 21 and bolt holes (not shown) at corresponding positions of the lower flange 63 and are bolted together. Here, the steel frame beam 60 is provided with reinforcing ribs 65 at positions corresponding to the side plates 23 of the steel boxes 20.

[0069] According to the joint structure 70 between the wooden column unit and the steel frame beam in the illustrated example, since the plurality of highly rigid steel boxes 20 provided in the wooden column unit 50 and the steel frame beam 60 are bolted together by high-strength bolts 68, a joint structure with high strength at the joint portion joining the wooden column unit 50 and the steel frame beam 60 can be formed.

[0070] Furthermore, a high compressive force is applied to the wooden columns 10 constituting the wooden column unit 50 through the tension members 30 into which a high tensile force is introduced, thereby forming a highly rigid wooden column unit 50.

[0071] In addition, other embodiments in which other components are combined with the configurations and the like described in the above embodiments may be possible, and the present invention is not limited to the configurations shown here. In this regard, it can be changed without departing from the gist of the present invention, and can be appropriately determined according to the application form.

Explanation of Symbols

[0072] 10: Wooden post 11: Upper end face 12: Lower end face 13: Side face 14: Wide face 15: Notch 17: Through opening (through hole) 17A, 17B: Through opening (through groove) 20, 20A~20H: Steel box 21: Upper and lower plates (upper upper and lower plates) 22: Upper and lower plates (lower upper and lower plates) 23: Side plate 23A: Reinforcing side plate 23B: U-shaped side wall 24: Middle plate 24A; Reinforcing middle plate 25: Access opening 26: First hole 27: Second hole 28: Third hole 30: Tension member 32: End 35: Fastener 50: Wooden post unit 60: Steel beam 61: Web 62: Upper flange 63: Lower flange 65: Reinforcing rib 68: Bolt (high-strength bolt) 70: Joint structure (joint structure between wooden post unit and steel beam) J: Tension device B: Tension bar C: Mechanical joint

Claims

1. A wooden column unit bolted to a steel frame beam, comprising: A rectangular parallelepiped wooden column; Steel boxes disposed in respective notches at four corner portions of the wooden column; A tension member inserted through a through-opening connecting two of the steel boxes above and below in the wooden column, The steel box includes a pair of upper and lower plates and a plurality of side plates connecting the pair of upper and lower plates. A first hole through which the tension member is inserted is formed in one of the pair of upper and lower plates, and a second hole through which a bolt is inserted when bolted to the steel frame beam is formed in the other of the pair of upper and lower plates. An access opening for accessing the inside of the steel box is provided in the middle of the plurality of side plates. The end of the tension member is inserted into each of the first holes of the upper and lower steel boxes, and is fixed to a fixture inside each of the steel boxes in a state where the tension member is tensioned. A wooden column unit characterized by this.

2. The planar shape of the steel box is rectangular, The wooden column unit according to claim 1, wherein the arrangement of the access openings in the side plates is set in a left-right symmetric relationship with respect to the center line of the rectangle.

3. In one of the pair of upper and lower plates in which the second hole is formed, a third hole is further formed at a position corresponding to the first hole. The third hole is a hole for introducing a tension force into the tension member, through which a tension bar extending from a tensioning device installed outside the steel box is inserted, and the end of the tension bar and the end of the tension member are connected by a mechanical joint inside the steel box. The wooden column unit according to claim 2, characterized by this.

4. The wooden column unit according to claim 3, wherein the tension member is an unbonded PC crimping material.

5. The wooden column unit according to claim 4, wherein the first hole is formed at the center position of the thickness of the wooden column and at the center position of the width of the steel box.

6. The wooden column unit according to claim 5, wherein the wooden column is a wall column formed of any one of a plurality of corner member units, glued laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

7. The column unit according to any one of claims 1 to 6 is disposed with respect to at least one of the upper steel beam and the lower steel beam, and the steel beam and the column unit are bolted together. A joining structure of a column unit and a steel beam, characterized in that.

Images