Wooden column unit and joint structure between wooden column unit and steel beam

Abstract

To provide a joint structure between a wooden column unit and a steel beam, which can reduce the amount of residual deformation when a building frame undergoes plastic deformation during an earthquake, and to provide a wooden column unit forming this joint structure.SOLUTION: Provided is a wooden column unit 60 including a wooden column 10, an upper horizontal crosspiece 20, and a lower horizontal crosspiece 30. A first hole 24 and a second hole 34 are provided in a lower flange 23 of the upper horizontal crosspiece 20 and an upper flange 32 of the lower horizontal crosspiece 30. The wooden column 10 has a through opening 15 that connects its upper end surface 11 and lower end surface 12 and communicates with the first hole 24 and the second hole 34. A tensioning member 40 is inserted through the through opening 15, the first hole 24, and the second hole 34, and is fixed in a tensioned state to fixing devices 45, 46 that abut against both the lower flange 23 and the upper flange 32. A first shear force-bearing steel material 50A is provided on the upper horizontal crosspiece 20, and a second shear force-bearing steel material 50B is provided on the lower horizontal crosspiece 30, and the first shear force-bearing steel material 50A and the second shear force-bearing steel material 50B are embedded inside the wooden column 10 from the upper end surface 11 and the lower end surface 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] 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 combines the high rigidity of steel with 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.

[0003] Here, specific examples of the effects of using wood include: compared to steel frames and concrete, wood is lighter, has a high specific strength, is easy to process, and has excellent heat insulation and humidity control properties. In addition, wood has the appearance design that natural materials exude, and because it is a natural material, it emits less carbon dioxide and is highly effective in reducing environmental impact.

[0004] Here, Patent Document 1 proposes a column-beam joint structure consisting of a wooden column and a steel beam. Specifically, in this column-beam joint structure, a beam load bearing portion is provided on the column toward the center of the joint end where it contacts the beam, and a joint metal fitting that joins the column and beam transmits part of the beam's load to the beam load bearing portion, and the beam load is supported by the column's joint end and the beam load bearing portion.

[0005] In this beam-column joint structure, a column reinforcement material made of carbon fiber is attached to the outer periphery of the column at the joint end where it meets the beam. Furthermore, at least one L-shaped metal joint is attached to the beam and column to join them together, and this L-shaped metal joint has a step so that part of the contact surface that meets the column does not interfere with the reinforcement material. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-256616 Summary of the Invention [Problem to be solved by the invention]

[0007] 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. 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 metal joints to both the wooden columns and the steel beams. Other hybrid frames also generally use joining structures in which the columns and beams are joined with various bolts, including lag screw bolts. However, such structures in which steel beams and wooden columns are joined with bolts have the problem of potentially large residual deformation when the building frame undergoes plastic deformation during an earthquake.

[0008] If the residual deformation is large, after an earthquake, various openings such as doors and windows may be prevented from opening and closing due to factors such as the inclination of the building's floors, which could have a significant impact on future livability, making large-scale repairs, renovations, and maintenance necessary.

[0009] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a joint structure between a wooden column unit and a steel beam, and a wooden column unit that forms this joint structure, which can reduce the amount of residual deformation when the building frame undergoes plastic deformation during an earthquake, and a wooden column unit that forms this joint structure. [Means for solving the problem]

[0010] In order to achieve the above object, one aspect of the wooden pole unit according to the present invention is as follows: A wooden column unit bolted to a steel beam, A rectangular wooden pillar and An upper horizontal beam and a lower horizontal beam made of steel abutting on the upper end surface and the lower end surface of the wooden pole; A tension member is provided inside the wooden pole and inserted into a through opening connecting the upper end surface and the lower end surface, The upper and lower ends of the tensioning material are inserted through a first hole provided in the upper horizontal beam and a second hole provided in the lower horizontal beam, and the upper and lower ends of the tensioning material are fixed to fixing devices that are engaged with the upper horizontal beam and the lower horizontal beam, respectively, when the tensioning material is in a tensioned state; The upper horizontal beam is provided with a first shear force bearing steel member protruding downward, and the lower horizontal beam is provided with a second shear force bearing steel member protruding upward, The first shear force bearing steel material is embedded inside the wooden pole from the upper end surface, and the second shear force bearing steel material is embedded inside the wooden pole from the lower end surface.

[0011] According to this embodiment, the wooden pillars and the upper and lower cross bars arranged above and below them are joined by tensioned tension members, and the upper and lower cross bars are joined to the steel beams above and below to form a joint structure. This increases the plastic deformation capacity of the building frame during a major earthquake compared to, for example, a joint structure between a wooden pillar and a wooden beam, and further contributes to the formation of a joint structure that can reduce the amount of residual deformation compared to a conventional column-beam joint structure that makes up a building frame, in which the pillar and beam are joined by bolts.

[0012] Furthermore, since the first shear force-bearing steel member protruding downward from the upper cross beam is buried inside the wooden column from its upper end surface, and the second shear force-bearing steel member protruding upward from the lower cross beam is buried inside the wooden column from its lower end surface, the shear force acting on the wooden column during an earthquake can be transmitted to the upper cross beam via the first shear force-bearing steel member, and then effectively transmitted from the upper cross beam to the steel beam above, and can also be transmitted to the lower cross beam via the second shear force-bearing steel member, and then effectively transmitted from the lower cross beam to the steel beam below.

[0013] Here, the steel material forming the upper horizontal bar and the lower horizontal bar can be shaped steel materials such as H-shaped steel and channel steel, as well as square steel pipes, etc. For example, when both the upper horizontal bar and the lower horizontal bar are formed from H-shaped steel, a first hole is formed in the lower flange of the upper horizontal bar, and a second hole is formed in the upper flange of the lower horizontal bar.

[0014] In addition, examples of configurations include a rectangular wooden pillar with one through opening near each of its left and right ends, with one tensioning member inserted into each through opening, for a total of two tensioning members on the left and right, or a pillar with multiple (for example, two) through openings near each of its left and right ends, for a total of four tensioning members, for example, two on each side, for tensioning.

[0015] Furthermore, "wooden pillars" include not only regular wooden pillars but also wooden wall pillars. "Tension members" can be PC (Prestressed Concrete) steel rods or PC steel wires. "Through openings" include openings that extend from the end or wide face of a wooden pillar to the interior and span between the upper and lower end faces, as well as through holes that connect the upper and lower end faces.

[0016] Another aspect of the wooden pole unit according to the present invention is: A first notch is provided from the upper end surface to the inside of the wooden pole, and a second notch is provided from the lower end surface to the inside of the wooden pole, The first shear force bearing steel material is fitted into the first cutout, and the second shear force bearing steel material is fitted into the second cutout.

[0017] According to this aspect, the first shear force bearing steel material is fitted into the first notch provided from the upper end surface of the wooden pole to the interior, and the second shear force bearing steel material is fitted into the second notch provided from the lower end surface of the wooden pole to the interior, so that the first shear force bearing steel material and the second shear force bearing steel material can be embedded smoothly and reliably from the upper end surface or the lower end surface of the wooden pole to the interior. Here, it is preferable that the first notch and the second notch are provided with shapes and dimensions that are complementary or approximately complementary to those of the first shear force bearing steel material and the second shear force bearing steel material.

[0018] Another aspect of the wooden pole unit according to the present invention is: The first shear force bearing steel material and the second shear force bearing steel material are both characterized by having at least a first steel plate extending in a direction perpendicular to the longitudinal direction of the upper horizontal bar or the lower horizontal bar.

[0019] According to this aspect, both the first shear force-bearing steel material and the second shear force-bearing steel material are provided with at least a first steel plate extending in a direction perpendicular to the longitudinal direction of the upper horizontal bar or the lower horizontal bar, so that the acting shear force can be effectively absorbed by the first steel plate and effectively transmitted to the upper horizontal bar or the lower horizontal bar.

[0020] Here, "the first shear force bearing steel material and the second shear force bearing steel material have at least a first steel plate" includes not only a configuration in which only the first steel plate is provided, but also a configuration in which other steel plates, etc. are provided to support the first steel plate.

[0021] Another aspect of the wooden pole unit according to the present invention is: The present invention is characterized in that both the first shear force-bearing steel material and the second shear force-bearing steel material further comprise a second steel plate extending in a direction along the longitudinal direction of the upper horizontal bar or the lower horizontal bar and joined to the first steel plate.

[0022] According to this aspect, both the first shear force-bearing steel material and the second shear force-bearing steel material further comprise a second steel plate extending in a direction along the longitudinal direction of the upper cross bar or the lower cross bar and joined to the first steel plate, so that the second steel plate can function as a reinforcing rib to support the first steel plate against the acting shear force, thereby suppressing damage to the joint of the first steel plate where the shear force acts, for example, where it is attached to the upper cross bar or the lower cross bar.

[0023] In another aspect of the wooden pole unit according to the present invention, The through opening is characterized in that it extends inward from the small end face or the wide end face of the wooden pole.

[0024] According to this aspect, the through opening extends inward from the small end face or the wide end face of the wooden pole, so that the opening through which the tendon is inserted is easy to manufacture regardless of the height of the wooden pole. For example, if the through opening is a through hole that straddles the upper and lower end faces of the wooden pole, the through hole is manufactured using a long and thin drill, but as the height of the wooden pole increases, it becomes more difficult to manufacture the through hole with a drill.

[0025] Another aspect of the wooden pole unit according to the present invention is: The through opening is characterized in that a first end reinforcing steel material and a second end reinforcing steel material are fitted into the upper region on the upper cross bar side and the lower region on the lower cross bar side, respectively, and are engaged with the end face or the wide face.

[0026] According to this embodiment, the first end reinforcing steel and the second end reinforcing steel are fitted into the upper region on the upper horizontal bar side and the lower region on the lower horizontal bar side of the through opening, respectively, and are engaged with the small end surface or the wide width surface.As a result, when the transmission performance of the acting shear force is insufficient using only the first shear force-bearing steel and the second shear force-bearing steel, the first end reinforcing steel and the second end reinforcing steel can work together with the first shear force-bearing steel and the second shear force-bearing steel to transmit the shear force to the upper horizontal bar and the lower horizontal bar.

[0027] In addition, by fitting the first end reinforcing steel and the second end reinforcing steel into the upper and lower regions of the through opening, the corners of the wooden post at the top, bottom, left and right can be effectively protected by the first end reinforcing steel and the second end reinforcing steel, which leads to the prevention of damage to the corners.

[0028] Another aspect of the wooden pole unit according to the present invention is: The upper horizontal beam and the lower horizontal beam are characterized by being formed from built H-shaped steel beams.

[0029] According to this aspect, since the upper horizontal crosspiece and the lower horizontal crosspiece are formed from build H-shaped steel (build H), it is possible to apply upper horizontal crosspieces and lower horizontal crosspieces made of H-shaped steel with various cross sections that are not available in pre-fabricated rolled H-shaped steel (roll H). Note that if pre-fabricated rolled H-shaped steel has an H-shaped steel with a preferred cross section, it is not excluded that the upper horizontal crosspiece and lower horizontal crosspiece made of rolled H-shaped steel may be applied.

[0030] Another aspect of the wooden pole unit according to the present invention is: The tendon is characterized in that it is an unbonded PC crimped material.

[0031] According to this embodiment, since the tendon is an unbonded PC pressure-bonded material, it is not necessary to place a sheath tube in the through opening or to fill it with grout, and the wooden column unit can be manufactured using a pressure-bonding method that is easy to manufacture.

[0032] Another aspect of the wooden pole unit according to the present invention is: The wooden pillar is a wall pillar formed from one of a plurality of square timber units, laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

[0033] According to this aspect, 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, so that the wall column functions as a load-bearing wall even while using wooden columns. For example, by adjusting the number of square timbers or the width of the laminated veneer lumber or cross-laminated timber, a wall column with the desired rigidity (earthquake resistance) can be formed.

[0034] In addition, one aspect of the joining structure between a wooden column unit and a steel beam according to the present invention is as follows: The wooden column unit is arranged between upper and lower steel beams, and the steel beams and the wooden column unit are connected by bolts.

[0035] According to this embodiment, the wooden column unit of the present invention is arranged between the upper and lower beams, which are steel beams, and the wooden column unit is bolted to the upper and lower beams using high-strength bolts or the like. As a result, the wooden column and the upper and lower cross beams arranged above and below it are joined by tensioned tension members, and the upper and lower cross beams are joined to the upper and lower beams. As a result, the plastic deformation capacity of the building frame in the event of a major earthquake is higher than, for example, a structure in which a wooden column and a wooden beam are joined, and further, the amount of residual deformation can be reduced compared to a structure in which a column and a beam are joined by bolts, such as in the column-beam joint structure that constitutes a conventional building frame. [Effects of the Invention]

[0036] As can be understood from the above explanation, the wooden column unit and the connection structure between the wooden column unit and the steel beam of the present invention can reduce the amount of residual deformation when the building frame undergoes plastic deformation during an earthquake. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 2 is a front view of an example of a wooden pole unit according to an embodiment. [Figure 2] 2 is a view taken in the direction of the arrow II in FIG. 1, and is a side view of an example of a wooden pole unit as seen from the end face side. [Figure 3]3 is a cross-sectional view taken along the line III-III in FIG. 1, in which the wooden pole unit is cut at a midpoint of the second shear force bearing steel member. [Figure 4] FIG. 10 is a front view of another example of a wooden pole unit according to an embodiment. [Figure 5] 5 is a cross-sectional view taken along the arrows VV in FIG. 4, showing another example of a wooden pole unit cut at a midpoint of the second shearing force bearing steel member. FIG. [Figure 6] FIG. 1 is a front view of an example of a joint structure between a wooden column unit and a steel beam according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, several examples of wooden column units according to embodiments and an example of a joint structure between a wooden column unit and a steel beam will be described with reference to the accompanying drawings. Note that in this specification and drawings, substantially identical components may be designated by the same reference numerals to avoid redundant description.

[0039] [Wooden pillar unit according to the embodiment, and joint structure between wooden pillar unit and steel beam] 1 to 6, several examples of wooden post units according to the embodiment and an example of a joint structure between a wooden post unit and a steel beam will be described. Here, FIG. 1 is a front view of an example of a wooden post unit according to the embodiment, FIG. 2 is a view taken along arrow II in FIG. 1, which is a side view of an example of a wooden post unit seen from the end face side, and FIG. 3 is a view taken along arrows III-III in FIG. 1, which is a cross-sectional view of the wooden post unit cut at a midpoint of the second shear force bearing steel member. Furthermore, FIG. 4 is a front view of another example of a wooden post unit according to the embodiment, and FIG. 5 is a view taken along arrows VV in FIG. 4, which is a cross-sectional view of another example of a wooden post unit cut at a midpoint of the second shear force bearing steel member. Furthermore, FIG. 6 is a front view of an example of a joint structure between a wooden post unit and a steel beam according to the embodiment.

[0040] As shown in Fig. 1, the wooden post unit 60 is a component that forms the joint structure 100 shown in Fig. 6. First, the configuration of the wooden post unit 60 will be described.

[0041] The wooden pole unit 60 has a wooden pole 10 and an upper horizontal beam 20 and a lower horizontal beam 30 arranged above and below the wooden pole 10.

[0042] 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 t2 (see Figure 2) in the wall thickness direction (width direction) is, for example, approximately the same as or larger 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 larger than the wall thickness), and the width t1 (see Figure 1) in the direction perpendicular to the wall thickness is about two to several times the width t2, and the pillar has a wide rectangular cross section with a wide wide surface 13.

[0043] The wooden column 10, which serves as a wall pillar, is formed from one of multiple log units, laminated timber, solid wood, structural plywood, laminated veneer lumber (LVL), or cross-laminated timber (CLT).

[0044] On each side of the wooden pole 10, two through openings 15 (four through openings 15 in total) are provided, which extend inward from the end face 14 and penetrate the upper end face 11 and the lower end face 12 of the wooden pole 10. Although not shown, the wooden pole 10 may have two through openings (four through openings in total) provided from the pair of wide faces 13 on each side. Furthermore, although not shown, the wooden pole 10 may have one through opening on each side, or three or more through openings on each side.

[0045] The upper cross beam 20 is formed from an H-shaped steel beam having a web 21, an upper flange 22, and a lower flange 23, and a first hole 24 is opened at a position corresponding to the back of the through opening 15 when the upper cross beam 20 is installed on the upper end surface 11 of the wooden pillar 10.

[0046] More specifically, the upper cross bar 20 is formed from a built H-shaped steel beam, but if an H-shaped steel beam with a suitable cross-sectional dimension exists among standard rolled H-shaped steel beams, a rolled H-shaped steel beam may also be applied.

[0047] A tension member 40 such as a PC steel rod is inserted into the through opening 15, and the upper part of the tension member 40 inserted into the first hole 24 of the upper cross bar 20 is fixed to the lower flange 23 by a fixing device 45.

[0048] The upper flange 22 of the upper horizontal beam 20 has a plurality of bolt holes (not shown) through which bolts are inserted when the upper horizontal beam 20 is bolted to an upper steel beam 70 (see FIG. 6). Similarly, the lower flange 33 of the lower horizontal beam 30 has a plurality of bolt holes (not shown) through which bolts are inserted when the lower horizontal beam 20 is bolted to a lower steel beam 80 (see FIG. 6).

[0049] On the other hand, the lower horizontal beam 30 is formed by an H-shaped steel having a web 31, an upper flange 32, and a lower flange 33, and this H-shaped steel is also a built H-shaped steel.

[0050] A second hole 34 is formed at a position corresponding to the back of the through opening 15 when the lower horizontal beam 30 abuts against the lower end surface 12 of the wooden post 10.

[0051] The lower part of the tendon 40 inserted through the through opening 15 and the second hole 34 of the lower horizontal bar 30 is fixed to the upper flange 32 by a fixing device 46.

[0052] In this way, with the lower part of the tension member 40 engaged with the upper flange 32 of the lower cross member 30 by the fixing device 46, the upper part of the tension member 40 extending upward from the first hole 24 of the lower flange 23 of the upper cross member 20 is tensioned by a tensioning device not shown, and the unbonded PC crimping method, in which the tension member is fixed to the lower flange 23 by the fixing device 45, is performed on all tension members 40, thereby forming a wooden column unit 60 in which the wooden column 10, upper cross member 20, and lower cross member 30 are integrated together by multiple tension members 40 (four in the illustrated example).

[0053] In other words, since the tendon 40 is an unbonded PC crimped material, it is not necessary to place a sheath tube in the through opening 15 or to fill it with grout, and the wooden column unit 60 can be manufactured using a crimping method that is easy to manufacture.

[0054] Furthermore, for example, a through hole may be drilled in the wooden pillar 10, spanning its upper end surface 11 and lower end surface 12. However, if the axial length of the wooden pillar 10 is long, it is extremely difficult to precisely drill a through hole over the entire length by drilling using a long, thin drill. Therefore, from the standpoint of manufacturability and processing accuracy, it is preferable to provide a through opening 15 extending inward from the end surface 14, etc., as in the illustrated example.

[0055] Furthermore, in the wooden pillar unit 60, a plurality of first shear force bearing steel members 50A are provided on the lower surface of the lower flange 23 of the upper horizontal beam 20 so as to protrude downward.

[0056] The first shear force-bearing steel member 50A includes a first steel plate 51 having a rectangular (rectangular or square) planar shape extending in a direction perpendicular to the longitudinal direction of the upper horizontal bar 20, and a second steel plate 52 extending in a direction along the longitudinal direction of the upper horizontal bar 20 and joined to the first steel plate 51. In the illustrated example, three first shear force-bearing steel members 50A are attached to the underside of the bottom flange 23, and the central first shear force-bearing steel member 50A includes two second steel plates 52, one on each side of the first steel plate 51. The second steel plates 52 are welded to the wide surface of the first steel plate 51 to form the first shear force-bearing steel member 50A, and the first shear force-bearing steel member 50A is welded to the underside of the bottom flange 23.

[0057] Here, the planar shape of the first steel plate 51 may be various shapes, such as a polygon other than a rectangle, but a rectangle as shown in the example shown is suitable as an example of a shape that can effectively withstand the shear force it bears and transmit it effectively to the upper horizontal cross member 20. The shear force borne by the first steel plate 51 is transmitted to the upper horizontal cross member 20, but the second steel plate 52 functions as a reinforcing rib to support the first steel plate 51 that bears the shear force, thereby increasing the joint strength of the first steel plate 51 that bears the shear force to the lower flange 23 and suppressing damage to the joint of the first steel plate 51. Therefore, strictly speaking, the acting shear force is stably transmitted to the upper horizontal cross member 20 by the first shear force-bearing steel material 50A consisting of the first steel plate 51 and the second steel plate 52.

[0058] On the other hand, from the upper end surface 11 of the wooden pillar 10 to the interior, multiple (three in the illustrated example) first notches 17A of a shape complementary to each first shear force bearing steel material 50A are provided, and when installing the upper cross beam 20 on the upper end surface 11 of the wooden pillar 10, the upper cross beam 20 is installed on the upper end surface 11 of the wooden pillar 10 by fitting the corresponding first shear force bearing steel material 50A into each first notch 17A.

[0059] When both are installed in this manner, the backs of the four through openings 15 provided in the wooden pillar 10 are aligned with the first holes 24 that are opened in the lower flange 23 and located at positions corresponding to each through opening 15.

[0060] On the other hand, a plurality of second shear force bearing steel members 50B are provided on the upper surface of the upper flange 32 of the lower horizontal beam 30 so as to protrude upward.

[0061] The second shear force bearing steel member 50B has a configuration similar to that of the first shear force bearing steel member 50A, and includes a first steel plate 53 having a rectangular planar shape extending in a direction perpendicular to the longitudinal direction of the lower horizontal bar, and a second steel plate 54 extending in a direction along the longitudinal direction of the lower horizontal bar and joined to the first steel plate 53. In the illustrated example, three second shear force bearing steel members 50B are attached to the upper surface of the upper flange 32, and the central second shear force bearing steel member 50B includes two second steel plates 54 on either side of the first steel plate 53.

[0062] The shear force borne by the first steel plate 53 is transmitted to the lower horizontal cross member 30, but the second steel plate 54 functions as a reinforcing rib to support the first steel plate 53 that bears the shear force, increasing the joint strength of the first steel plate 53 that receives the shear force to the upper flange 32 and suppressing damage to the joint of the first steel plate 53. Therefore, strictly speaking, the acting shear force is stably transmitted to the lower horizontal cross member 30 by the second shear force-bearing steel material 50B made up of the first steel plate 53 and the second steel plate 54.

[0063] On the other hand, from the lower end surface 12 of the wooden pillar 10 to the interior, a plurality of second notches 17B (three in the illustrated example) having a shape complementary to each second shear force bearing steel member 50B are provided, and when installing the lower cross beam 30 on the lower end surface 12 of the wooden pillar 10, the lower cross beam 30 is installed on the lower end surface 12 of the wooden pillar 10 by fitting the corresponding second shear force bearing steel member 50B into each second notch 17B.

[0064] When both are installed in this manner, the backs of the four through openings 15 provided in the wooden pillar 10 are aligned with the second holes 34 that are opened in the upper flange 32 and located at positions corresponding to each through opening 15.

[0065] An example of a method for manufacturing the wooden pole unit 60 in a factory or the like is to first attach the lower cross beam 30 to the lower end surface 12 of the wooden pole 10, for example, by fitting the second shear force bearing steel material 50B into each second notch 17B of the wooden pole 10.

[0066] Next, a tension member 40 is inserted into each through opening 15, and a portion of the tension member 40 is passed through the second hole 34 of the lower cross member 30. The upper cross member 20 is attached to the upper end surface 11 of the wooden column 10 by fitting the first shear force-bearing steel member 50A into each first notch 17A of the wooden column 10, and the tension member 40 is pulled up and passed through a portion of the first hole 24 of the upper cross member 20.

[0067] Next, one end of the tension member 40 is fixed to the upper flange 32 with a fixing device 46, and then the tension member 40 is tensioned on the upper crossbeam side, and the other end of the tension member 40 is fastened with a fixing device 45 to fix it to the lower flange 23. By performing this work on all the tension members 40 simultaneously or sequentially, the wooden column unit 60 is manufactured.

[0068] In this way, the first shear force-bearing steel 50A protruding downward from the upper cross beam 20 is buried inside the wooden column 10 from the upper end surface 11, and the second shear force-bearing steel 50B protruding upward from the lower cross beam 30 is buried inside the wooden column 10 from the lower end surface 12.This allows the shear force acting on the wooden column 10 during an earthquake to be transmitted to the upper cross beam 20 via the first shear force-bearing steel 50A, and then effectively transmitted from the upper cross beam 20 to the steel beam 70 above (see Figure 6), and also to the lower cross beam 30 via the second shear force-bearing steel 50B, and then effectively transmitted from the lower cross beam 30 to the steel beam 80 below (see Figure 6).

[0069] If the first shear force-bearing steel material 50A and the second shear force-bearing steel material 50B were not structured to be embedded in the wooden pillar 10, the shear force would be transmitted solely by the frictional force between the upper cross beam 20 and the lower cross beam 30 and the upper end surface 11 and lower end surface 12 of the wooden pillar 10, and the shear force acting on the wooden pillar 10 would not be transmitted sufficiently to the upper cross beam 20 and the lower cross beam 30.

[0070] Furthermore, if the upper end surface 11 or lower end surface 12 of the wooden pillar 10 is joined to the upper cross beam 20 or lower cross beam 30 using drift pins or the like to transmit shear forces, depending on the dimensions of the wooden pillar 10, the number of drift pins or the like required may become too large, which would undesirably reduce the manufacturability of the wooden pillar unit and increase manufacturing costs.

[0071] Furthermore, as shown in the illustrated example, by fitting the first shear force bearing steel material 50A and the second shear force bearing steel material 50B into the first notch 17A and the second notch 17B extending from the upper end surface 11 and the lower end surface 12 of the wooden pole 10 to the inside, the first shear force bearing steel material 50A and the second shear force bearing steel material 50B can be embedded smoothly and reliably from the upper end surface 11 and the lower end surface 12 of the wooden pole 10 to the inside, which is preferable.

[0072] On the other hand, another example of wooden post unit 60A shown in Figures 4 and 5 differs from wooden post unit 60 in that it further has a configuration in which a first end reinforcing steel material 55A and a second end reinforcing steel material 55B are fitted into the upper region on the upper cross bar side and the lower region on the lower cross bar side of the through opening 15, respectively, and are engaged with the end face 14.

[0073] The first end reinforcing steel material 55A comprises a locking steel plate 56 which is rectangular in plan view and has the same height as the first steel plate 51, and two recessed steel plates 57 which protrude from the wide surface of the locking steel plate 56. Each recessed steel plate 57 fits into the corresponding through opening 15, and the locking steel plate 56 abuts against the end face 14 of the wooden post 10. The upper end of the locking steel plate 56 is welded to the lower flange 23 of the upper cross bar 20, so that the first end reinforcing steel material 55A is joined to the upper cross bar 20 while being recessed into the through opening 15.

[0074] On the other hand, the second end reinforcing steel material 55B comprises a locking steel plate 58 which is rectangular in plan view and has the same height as the first steel plate 53, and two recessed steel plates 59 which protrude from the wide surface of the locking steel plate 58. Each recessed steel plate 59 fits into the corresponding through opening 15, and the locking steel plate 58 is in a position where it abuts the end face 14 of the wooden post 10. The lower end of the locking steel plate 58 is welded to the upper flange 32 of the lower cross bar 30, so that the second end reinforcing steel material 55B is joined to the lower cross bar 30 while being recessed into the through opening 15.

[0075] According to the wooden pillar unit 60A, the first end reinforcing steel material 55A and the second end reinforcing steel material 55B are fitted into the upper region on the upper cross bar side and the lower region on the lower cross bar side of the through opening 15, respectively, and are engaged with the end face 14. Therefore, when the transmission performance of the acting shear force is insufficient using the first shear force-bearing steel material 50A or the second shear force-bearing steel material 50B alone, the first end reinforcing steel material 55A or the second end reinforcing steel material 55B can work together with the first shear force-bearing steel material 50A or the second shear force-bearing steel material 50B to transmit the shear force to the upper cross bar 20 or the lower cross bar 30.

[0076] Furthermore, by fitting the first end reinforcing steel material 55A and the second end reinforcing steel material 55B into the upper and lower regions of the through opening 15, the top, bottom, left and right corners of the wooden pillar 10 can be effectively protected by the first end reinforcing steel material 55A and the second end reinforcing steel material 55B, which leads to the prevention of damage to the corners of the wooden pillar 10.

[0077] The wooden pillar units 60, 60A are fabricated in a factory and transported to a construction site where a building is to be constructed, but each member may be transported to the site in a separate state and fabricated in a fabrication yard or the like on the site.

[0078] For example, taking a wooden column unit 60 manufactured in a factory and transported to the site as an example, as shown in Figure 6, the upper steel beam 70 is bolted to the upper cross beam 20, and the lower steel beam 80 is bolted to the lower cross beam 30, thereby forming a connection structure 100 between the wooden column unit and the steel beam.

[0079] More specifically, the lower flange 73 of the upper beam 70, which is made of an H-shaped steel having a web 71, an upper flange 72, and a lower flange 73, is abutted against the upper surface of the upper flange 22 of the upper cross beam 20, and high-strength bolts 90 are inserted into bolt holes 22a of the upper flange 22 and bolt holes (not shown) at corresponding positions in the lower flange 73, thereby forming a bolt connection. Here, the upper beam 70 is provided with reinforcing ribs 75 at positions corresponding to the corners of the wooden column units 60.

[0080] Furthermore, the upper flange 82 of the lower beam 80, which is made of an H-shaped steel and has a web 81, an upper flange 82, and a lower flange 83, is abutted against the underside of the lower flange 33 of the lower cross beam 30, and high-strength bolts 90 are inserted into bolt holes (not shown) in the lower flange 33 and bolt holes (not shown) at corresponding positions in the upper flange 82, thereby forming a bolt connection, thereby forming a connection structure 100. Here, the lower beam 80 is provided with reinforcing ribs 85 at positions corresponding to the corners of the wooden column units 60.

[0081] In the illustrated example of the connection structure 100 between a wooden column unit and a steel beam, a wooden column unit 60 is disposed between upper and lower steel beams 70, 80, and the upper and lower steel beams 70, 80 and the wooden column unit 60 are bolted together with high-strength bolts 90. The wooden column 10 is connected to the upper and lower upper horizontal beams 20 and lower horizontal beams 30 disposed above and below it with tensioned tendons 40, and the upper horizontal beams 20 and lower horizontal beams 30 are connected to the upper and lower steel beams 70, 80. This increases the plastic deformation capacity of the building frame in a major earthquake compared to, for example, a wooden column-to-wood beam connection structure. Furthermore, the residual deformation can be reduced compared to conventional column-to-beam connection structures that make up building frames, where columns and beams are connected with bolts.

[0082] Furthermore, when a horizontal force F acts on the connection structure 100 during an earthquake and a shear force S caused by the horizontal force F acts on the wooden column 10, the shear force S is transmitted to the upper cross bar 20 via the first shear force-bearing steel member 50A, and can be effectively transmitted from the upper cross bar 20 to the steel beam 70 above, and the shear force S is transmitted to the lower cross bar 30 via the second shear force-bearing steel member 50B, and can be effectively transmitted from the lower cross bar 30 to the steel beam 80 below, resulting in a connection structure with excellent shear force transmission properties.

[0083] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0084] 10: Wooden pillar 11:Top end surface 12: Bottom end surface 13: Wide surface 14: Small side 15:Through opening 17A: First notch 17B: Second notch 20: Upper horizontal beam (H-shaped steel, built H-shaped steel) 21:Web 22: Upper flange 23: Lower flange 24: 1st hole 30: Lower crosspiece (H-shaped steel, built H-shaped steel) 31:Web 32: Upper flange 33: Lower flange 34:Second hole 40: Tensile material 45, 46: Fixing device 50A: First shear force bearing steel 50B: Second shear force bearing steel 51,53: 1st steel plate 52,54:Second steel plate 55A: First end reinforcing steel 55B: Second end reinforcing steel 56,58: Locking steel plate 57, 59: Steel plate insert 60, 60A: Wooden pillar unit 70: Upper beam (steel beam) 71:Web 72: Upper flange 73: Lower flange 75: Reinforcement rib 80: Lower beam (steel beam) 81:Web 82: Upper flange 83: Lower flange 85: Reinforcement rib 90: High strength bolt 100: Joint structure of wooden column unit and steel beam (joint structure) F: Horizontal force S: Shear force

Claims

1. A wooden column unit bolted to a steel beam, A rectangular wooden pillar and An upper horizontal beam and a lower horizontal beam made of steel abutting on the upper end surface and the lower end surface of the wooden pole; A tension member is provided inside the wooden pole and inserted into a through opening connecting the upper end surface and the lower end surface, The upper and lower ends of the tensioning material are inserted through a first hole provided in the upper horizontal beam and a second hole provided in the lower horizontal beam, and the upper and lower ends of the tensioning material are fixed to fixing devices that are engaged with the upper horizontal beam and the lower horizontal beam, respectively, when the tensioning material is in a tensioned state; The upper horizontal beam is provided with a first shear force bearing steel member protruding downward, and the lower horizontal beam is provided with a second shear force bearing steel member protruding upward, A wooden pole unit, characterized in that the first shear force-bearing steel is embedded inside the wooden pole from the upper end surface, and the second shear force-bearing steel is embedded inside the wooden pole from the lower end surface.

2. A first notch is provided from the upper end surface to the inside of the wooden pole, and a second notch is provided from the lower end surface to the inside of the wooden pole, 2. The wooden pole unit according to claim 1, wherein the first shear force bearing steel material is fitted into the first notch, and the second shear force bearing steel material is fitted into the second notch.

3. A wooden column unit as described in claim 1, characterized in that both the first shear force-bearing steel material and the second shear force-bearing steel material have at least a first steel plate extending in a direction perpendicular to the longitudinal direction of the upper cross bar or the lower cross bar.

4. The wooden column unit described in claim 3, characterized in that both the first shear force-bearing steel material and the second shear force-bearing steel material further comprise a second steel plate extending in a direction along the longitudinal direction of the upper cross bar or the lower cross bar and joined to the first steel plate.

5. 2. The wooden pole unit according to claim 1, wherein the through opening extends inward from the small end face or the wide end face of the wooden pole.

6. The wooden post unit described in claim 5, characterized in that a first end reinforcing steel material and a second end reinforcing steel material are fitted into the upper region of the upper cross bar side and the lower region of the lower cross bar side of the through opening, respectively, and are engaged with the end face or the wide face.

7. The wooden column unit according to claim 1, characterized in that the upper horizontal beam and the lower horizontal beam are formed from built H-shaped steel beams.

8. The wooden pole unit according to claim 1, characterized in that the tendons are unbonded PC crimped members.

9. The wooden post unit according to claim 1, characterized in that the wooden post is a wall post formed from one of multiple square timber units, laminated timber, solid wood, structural plywood, laminated veneer lumber, and cross-laminated timber.

10. A connection structure between a wooden column unit and a steel beam, characterized in that a wooden column unit described in any one of claims 1 to 9 is arranged between an upper beam and a lower beam which are steel beams, and the steel beam and the wooden column unit are bolted together.

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