Method for constructing wooden column and beam, and wooden column and beam joint structure

Abstract

To suppress the sinking of a joint hardware into the upper end of a woody column in a woody column-beam joint structure for joining the woody column and a woody beam through the joint hardware.SOLUTION: A method of constructing a wooden column and beam includes a wooden column erection step of erecting a lower wooden column 10 in which a slit 30 opening an upper surface side 20U and a side surface 20S2 of a joint part 20J is formed, and a wooden beam installation step of inserting a gusset plate part 82B protruding from the end surface of a wooden beam 40 into the slit 30 and placing a base plate part 90 joined to the upper end part of the gusset plate part 82B on the upper surface 20U of the joint part 20J.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wooden column-beam construction method and a wooden column-beam joint structure. [Background technology]

[0002] 2. Description of the Related Art Joining structures in which a wooden column and a wooden beam are joined via a metal joint are known (see, for example, Patent Documents 1 to 3).

[0003] In the joint structure disclosed in Patent Document 1, a wooden pillar and four wooden beams are joined via a joint metal member that is cross-shaped in plan view. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-014036 A [Patent Document 2] JP 2008-019652 A [Patent Document 3] JP 2014-109150 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the joint structure disclosed in Patent Document 1, the joint metal is inserted into a cross-shaped slit in a plan view formed in the upper end of the wooden pole. Therefore, there is room for improvement in that the joint metal may sink into the upper end of the wooden pole.

[0006] Taking into consideration the above-mentioned facts, the present invention aims to prevent the embedding of a metal joint into the upper end of a wooden column in a wooden column-beam joint structure in which a wooden column and a wooden beam are joined via a metal joint. [Means for solving the problem]

[0007] The wooden column and beam construction method described in claim 1 comprises a wooden column erection process for erecting a wooden column having a slit formed therein that opens the top and sides of a joint portion, and a wooden beam installation process for inserting a gusset plate portion protruding from the end face of the wooden beam into the slit and placing a base plate portion joined to the upper end portion of the gusset plate portion on the top surface of the joint portion.

[0008] According to the wooden column and beam construction method of claim 1, first, in the wooden column erecting step, a wooden column is erected with slits formed to open the top and sides of the joint. Next, in the wooden beam installation step, the gusset plate part protruding from the end face of the wooden beam is inserted into the slit formed in the joint of the wooden column, and the base plate part joined to the top end part of the gusset plate part is placed on the top face of the joint of the wooden column.

[0009] The gusset plate portion is inserted into the slit with one end protruding from the side of the joint. A base plate portion is provided on the upper end of the gusset plate portion. The base plate portion is placed on the upper surface of the joint of the wooden column. The base plate portion is fixed to the joint of the wooden column by a fixing member. A wooden beam is joined to one end of the gusset plate portion.

[0010] As described above, the upper end of the gusset plate is provided with a base plate that is placed on the upper surface of the joint. This allows the load of the wooden beam to be distributed and transmitted to the upper surface of the joint of the wooden column via the gusset plate and the base plate. This prevents the gusset plate from penetrating into the joint of the wooden column.

[0011] Another possible solution is to drop a wooden beam from above onto a gusset plate protruding from the side of the joint of a wooden column, and then insert the gusset plate into a slit formed on the underside of the wooden beam to join them.

[0012] However, forming a slit on the underside of a wooden beam may reduce the aesthetic appeal when looking up at the wooden beam.

[0013] In contrast, in the present invention, as described above, in the wooden beam installation process, the gusset plate portion protruding from the end face of the wooden beam is inserted into a slit formed in the joint portion of the wooden column, and the base plate portion joined to the upper end portion of the gusset plate portion is placed on the upper surface of the joint portion of the wooden column.

[0014] Therefore, in the present invention, it is not necessary to form a slit on the underside of the wooden beam, which prevents the design from being impaired when looking up at the wooden beam.

[0015] In this way, the present invention can prevent the gusset plate portion from sinking into the joint portion of the wooden column, while also preventing a decrease in the design when looking up at the wooden beam.

[0016] The wooden column-beam joint structure described in claim 2 comprises a wooden column having a slit formed therein that opens the top and side surfaces of a joint section, a connecting metal fitting having a gusset plate section inserted into the slit with one end side protruding from the side surface of the joint section and a base plate section provided at the upper end part of the gusset plate section and overlapped on the top surface of the joint section, a fixing member that fixes the base plate section to the joint section, and a wooden beam joined to the one end side of the gusset plate section.

[0017] According to the wooden column-beam joint structure of claim 2, a slit is formed in the joint of the wooden column, which opens the top and sides. Also, the joint metal has a gusset plate portion and a base plate portion.

[0018] The gusset plate portion is inserted into the slit with one end protruding from the side of the joint. A base plate portion is provided on the upper end of the gusset plate portion. The base plate portion is placed on the upper surface of the joint of the wooden column. The base plate portion is fixed to the joint of the wooden column by a fixing member. A wooden beam is joined to one end of the gusset plate portion.

[0019] As described above, the upper end of the gusset plate is provided with a base plate that is placed on the upper surface of the joint. This allows the load of the wooden beam to be distributed and transmitted to the upper surface of the joint of the wooden column via the gusset plate and the base plate. This prevents the gusset plate from penetrating into the joint of the wooden column.

[0020] The base plate is fixed to the upper surface of the joint of the wooden column by the fixing member. This allows, for example, stress (bending stress, etc.) of the wooden beam to be transmitted to the joint of the wooden column via the gusset plate, the base plate, and the fixing member. This improves earthquake resistance.

[0021] Furthermore, for example, it is possible to drop a wooden beam from above onto a gusset plate protruding from the side of the joint of a wooden column, and then insert the gusset plate into a slit formed on the underside of the wooden beam to join them.

[0022] However, forming a slit on the underside of a wooden beam may reduce the aesthetic appeal when looking up at the wooden beam.

[0023] In contrast, in the present invention, a slit that opens on the top and sides is formed in the joint of the wooden column, so that the gusset plate part of the joint metal that is attached in advance to the end of the wooden beam can be dropped into the slit of the joint of the wooden column from above.

[0024] Therefore, there is no need to form a slit on the underside of the wooden beam, which prevents the design from being impaired when looking up at the wooden beam.

[0025] In this way, the present invention can prevent the gusset plate portion from sinking into the joint portion of the wooden column, while also preventing a decrease in the design when looking up at the wooden beam.

[0026] The wooden column-beam joint structure described in claim 3 is the wooden column-beam joint structure described in claim 2, which includes an upper wooden column placed on a lower wooden column as the wooden column, and the connecting metal is provided on the upper surface of the base plate portion and has a flange portion to which the upper wooden column is joined.

[0027] According to the wooden column-beam joint structure of claim 3, the upper wooden column is placed on the lower wooden column as a wooden column. The joint metal has a flange portion provided on the upper surface of the base plate portion. The upper wooden column is joined to this flange portion. In this way, the upper wooden column is joined to the lower wooden column via the joint metal.

[0028] By providing a flange portion on the upper surface of the base plate portion of the connecting metal in this manner, the lower wooden column and the upper wooden column can be easily joined via the connecting metal.

[0029] As mentioned above, the base plate of the metal joint is fixed to the upper surface of the joint of the lower wooden column by the fixing member. This allows the pull-out force (bending moment) of the upper wooden column to be transmitted to the lower wooden column via the flange, base plate, and fixing member. This improves the earthquake resistance. Effect of the Invention

[0030] As described above, according to the present invention, in a wooden column-beam joint structure in which a wooden column and a wooden beam are joined via a metal joint, it is possible to prevent the metal joint from sinking into the upper end of the wooden column. [Brief description of the drawings]

[0031] [Figure 1] 1 is a longitudinal cross-sectional view showing a lower wooden column, an upper wooden column, and a wooden beam to which a wooden column-beam joint structure according to one embodiment is applied. FIG. [Diagram 2] 2 is a cross-sectional view taken along line 2-2 of FIG. 1. [Diagram 3] 2 is an exploded perspective view showing the lower wooden column, the upper wooden column, and the metal joints shown in FIG. 1. FIG. [Figure 4] FIG. 2 is an elevation view showing a construction process of a wooden column and beam construction method according to one embodiment. [Diagram 5] FIG. 2 is an elevation view showing a construction process of a wooden column and beam construction method according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Hereinafter, one embodiment will be described with reference to the drawings.

[0033] (Wood column beam joint structure) 1 shows a lower wooden column 10, an upper wooden column 12, and a wooden beam 40 to which the wooden column-beam joint structure according to this embodiment is applied. The lower wooden column 10, the upper wooden column 12, and the wooden beam 40 are joined via joint metal fittings 80. In addition, as shown in FIG. 2, a steel beam 60 is joined to the lower wooden column 10 via the joint metal fittings 80.

[0034] (Lower wooden pillar, upper wooden pillar) 1, an upper wooden column 12 is disposed above a lower wooden column 10. A lower end of the upper wooden column 12 is joined to a joint portion 20J of the lower wooden column 10 via a metal joint 80.

[0035] The upper wooden pillar 12 and the lower wooden pillar 10 have the same configuration. Therefore, in the following, the configuration of the lower wooden pillar 10 will be described, and a description of the configuration of the upper wooden pillar 12 will be omitted.

[0036] As shown in Fig. 2, the lower wooden column 10 is formed in a rectangular column shape. A fire-resistant structure is applied to the lower wooden column 10. The lower wooden column 10 has a wood core 20 that supports a load and a fire-resistant covering 22 that provides a fire-resistant covering to the wood core 20.

[0037] (woody heart) The wood core 20 is formed of a wood material such as laminated lumber. The wood core 20 extends in the material axis direction of the lower wooden column 10 and has a rectangular cross-sectional shape. The wood core 20 is formed to be able to support the load (long-term load and short-term load) borne by the lower wooden column 10.

[0038] (Fireproof coating) The fire-resistant covering portion 22 has a fire-retardant layer 24 that covers the woody core portion 20 and a substitute fire layer 26 that covers the fire-retardant layer 24.

[0039] (Fire-stop layer) A fire-retardant layer 24 is provided on the outside of the woody core 20. The fire-retardant layer 24 is a layer that stops the combustion of the substitute fire layer 26 in the event of a fire (natural extinguishing) and suppresses the combustion of the woody core 20. The fire-retardant layer 24 is disposed along the outer periphery of the woody core 20, and covers the entire side surface of the woody core 20.

[0040] The fire-retardant layer 24 is a high-heat-capacity layer (heat-capacity type) that has a larger heat capacity than the wood core 20. This fire-retardant layer 24 has a plurality of wood materials 24A and hardened bodies 24B arranged alternately on the outer surface of the wood core 20. Each of the wood materials 24A and hardened bodies 24B is arranged along the material axis direction of the lower wooden column 10.

[0041] The wooden material 24A is made of laminated wood or the like, and is bonded to the outer surface of the wooden core 20 with an adhesive or the like. On the other hand, the hardened body 24B is formed, for example, by hardening mortar, grout or concrete, and has a greater heat capacity than the wooden material 24A. By arranging the wooden material 24A and the hardened body 24B alternately, the heat capacity of the entire fire-retardant layer 24 is greater than the heat capacity of the wooden core 20 and the substitute fire layer 26.

[0042] (burning layer) A wooden sub-combustion layer 26 is provided on the outside of the fire-stopping layer 24. The sub-combustion layer 26 burns in the event of a fire and forms a carbonized layer (thermal insulation layer), thereby preventing the penetration of fire heat into the woody core 20.

[0043] The sub-combustible layer 26 is formed of a wooden material such as laminated lumber. The sub-combustible layer 26 is disposed along the outer periphery of the fire-retardant layer 24, and covers the entire outer surface of the fire-retardant layer 24. The sub-combustible layer 26 is bonded to the outer surface of the wooden material 24A of the fire-retardant layer 24 with an adhesive or the like.

[0044] The thickness (layer thickness) of the so-called fuel layer 26 is appropriately set according to the required fire resistance (fire resistance time) of the lower wooden column 10, the burning speed of the so-called fuel layer 26, and the heat insulation performance.

[0045] (wooden beam) 1 and 2, an end of the wooden beam 40 is joined to the joint 20J of the lower wooden column 10 via a metal joint 80. The wooden beam 40 is installed between the lower wooden column 10 and a column (not shown), and supports a slab 70.

[0046] 2, the wooden beam 40 is formed with a rectangular cross section. In addition, a fire-resistant structure is applied to the wooden beam 40. This wooden beam 40 has a wooden core 50 that supports a load, and a fire-resistant covering 52 that provides a fire-resistant covering to the wooden core 50.

[0047] The fire-resistant covering portion 52 has a fire-retardant layer 54 that covers the wood core portion 50, and a substitute fire layer 56 that covers the fire-retardant layer 54. The fire-retardant layer 54 also has a plurality of wood materials and a hardened body 54B, not shown.

[0048] The configurations of the wood core 50 and fire-resistant covering 52 of the wooden beam 40 are similar to those of the wood core 20 and fire-resistant covering 22 of the lower wooden column 10, so a detailed explanation will be omitted. However, the fire-resistant covering 52 of the wooden beam 40 covers both side surfaces and the underside of the wood core 50, but does not cover the top surface of the wood core 50. The top surface of the wood core 50 is covered by a slab 70, which will be described later.

[0049] (Steel beam) 2, the steel beam 60 is arranged in a direction substantially perpendicular to the wooden beam 40. The end of the steel beam 60 is joined to the joint 20J of the lower wooden column 10 via a metal joint 80. The steel beam 60 is erected between the lower wooden column 10 and a column (not shown), and supports a slab 70.

[0050] The steel beam 60 is formed of, for example, an H-shaped steel. The steel beam 60 has a flange portion 62 and a web portion 64. The steel beam 60 is fire-resistant coated with a fire-resistant coating material (not shown).

[0051] (Slab) 1, the slab 70 is supported by the above-mentioned wooden beams 40 and steel beams 60. The slab 70 is made of reinforced concrete and has a plurality of slab reinforcements (not shown) embedded therein. In this embodiment, the slab 70 on the opposite side of the lower wooden column 10 from the wooden beams 40 is a cantilever slab.

[0052] Here, the lower end of the upper wooden column 12 is not provided with a fire-resistant covering 22, and the wood core 20 is exposed. The wood core 20 constituting the lower end of the upper wooden column 12 is covered (fire-resistant covered) by a slab 70.

[0053] (Metal joints) 3, the joint metal 80 is a metal that joins the lower wooden column 10, the upper wooden column 12, the wooden beam 40, and the steel beam 60. The joint metal 80 has a pair of gusset plate portions 82A, 82B, a reinforcing plate portion 84, a base plate portion 90, and a flange portion 94.

[0054] The pair of gusset plate portions 82A, 82B are formed of steel plates or the like and are arranged in an L-shape in plan view. One of the gusset plate portions 82A has a plurality of through holes 86 for bolts 66 (see FIG. 2) that join the steel beams 60.

[0055] The other gusset plate portion 82B has a plurality of through holes 88 for the drift pins 44 (see FIG. 2) that join the wooden beams 40. The other gusset plate portion 82B is reinforced by a reinforcing plate portion 84.

[0056] The reinforcing plate portion 84 is formed of a steel plate or the like, and extends from a corner of the pair of gusset plate portions 82A, 82B to the opposite side to the other gusset plate portion 82B in a plan view. In other words, the pair of gusset plate portions 82A, 82B and the reinforcing plate portion 84 are arranged in a T-shape in a plan view.

[0057] The pair of gusset plate portions 82A, 82B and the reinforcing plate portion 84 are inserted into slits 30 formed in the joint portion 20J of the lower wooden column 10. Here, the fire-resistant coating portion 22 is not provided on the side surface 20S1 of the upper end portion of the lower wooden column 10 facing the steel beam 60 and the side surface 20S2 facing the wooden beam 40, and the wood core portion 20 is exposed. The joint portion 20J of the lower wooden column 10 is formed by this wood core portion 20.

[0058] The slit 30 is formed in a T-shape in plan view at the joint 20J of the lower wooden column 10. The slit 30 opens an upper surface 20U of the joint 20J of the lower wooden column 10, a side surface 20S1 on the steel beam 60 side, and a side surface 20S2 on the wooden beam 40 side.

[0059] The reinforcing plate portion 84 is inserted into the slit 30 so as not to protrude from the side surface of the joint portion 20J of the lower wooden post 10. The reinforcing plate portion 84 may be provided on the joint metal member 80 as necessary, and may be omitted as appropriate.

[0060] Of the pair of gusset plate portions 82A, 82B, one gusset plate portion 82A is inserted into the slit 30 with one end protruding from the side surface 20S1 on the steel beam 60 side at the joint portion 20J of the lower wooden column 10. An end of the steel beam 60 is joined to one end of this one gusset plate portion 82A.

[0061] 2, one end of one gusset plate portion 82A is joined to a web portion 64 of a steel beam 60 by a bolt 66 and a nut 68 in a state where it is overlapped with the web portion 64 of the steel beam 60. Note that the joining of one gusset plate portion 82A and the steel beam 60 is not limited to the bolt joining, and may be done by, for example, welding or the like.

[0062] Of the pair of gusset plate portions 82A, 82B, the other gusset plate portion 82B is inserted into the slit 30 with one end protruding from the side surface 20S2 on the wooden beam 40 side at the joint portion 20J of the lower wooden column 10. An end of the wooden beam 40 is joined to one end of the other gusset plate portion 82B.

[0063] Specifically, the other gusset plate portion 82B is joined to the end of the wooden beam 40 by a so-called steel plate insertion drift pin joint. A slit 42 extending in the beam formation direction is formed on the end face of the wooden beam 40. One end side of the other gusset plate portion 82B is inserted into this slit 42. Note that the slit 42 does not reach the lower surface of the wooden beam 40 and does not open to the lower surface.

[0064] The aforementioned multiple through holes 88 (see FIG. 3) are formed on one end side of the other gusset plate portion 82B. Also, multiple through holes are formed on the end portion of the wooden beam 40. The end portion of the wooden beam 40 and one end side of the other gusset plate portion 82B are joined by the drift pins 44 inserted into the through holes 88, respectively.

[0065] The drift pin 44 is an example of a pin member. The joint structure between the other gusset plate portion 82B and the wooden beam 40 is not limited to the steel plate insertion drift pin joint, and may be other joint structures.

[0066] (Base plate part) 1 and 3, a base plate portion 90 is provided on upper ends of the pair of gusset plate portions 82A, 82B and the reinforcing plate portion 84. The base plate portion 90 is formed from a steel plate or the like into a rectangular shape in a plan view.

[0067] The base plate portion 90 is placed on the upper surface 20U of the joint portion 20J of the lower wooden column 10. The base plate portion 90 is fixed to the joint portion 20J of the lower wooden column 10 by a plurality of lag screw bolts 32. The lag screw bolts 32 are an example of a fixing member.

[0068] Specifically, a plurality of lag screw bolts 32 are screwed into the upper surface 20U of the joint 20J of the lower wooden column 10. The upper ends of the plurality of lag screw bolts 32 protrude from the upper surface 20U of the joint 20J and pass through fixing holes 92 formed in the outer periphery of the base plate portion 90. By fastening nuts 34 to the upper ends of these lag screw bolts 32, the base plate portion 90 is fixed to the upper surface 20U of the joint 20J of the lower wooden column 10.

[0069] (Flange part) A flange portion 94 is provided on the upper surface of the base plate portion 90. The flange portion 94 is formed from a steel plate or the like, and protrudes upward from the upper surface of the base plate portion 90. This base plate portion 90 is joined to the lower end portion of the upper wooden column 12.

[0070] Specifically, the flange portion 94 is joined to the wood core portion 20 that constitutes the lower end portion of the upper wooden column 12 by a so-called steel plate insertion drift pin joint. As described above, the fire-resistant coating portion 22 is not provided at the lower end portion of the upper wooden column 12, and the wood core portion 20 is exposed.

[0071] A slit (lower surface slit) 36 extending in the width direction is formed on the lower surface of the upper wooden column 12. The upper end side of the flange portion 94 is inserted into this slit 36. As a result, the lower surface of the upper wooden column 12 is placed on the upper surface 20U of the joint portion 20J of the lower wooden column 10 via the base plate portion 90.

[0072] A plurality of through holes 37, 96 are formed in the lower end of the upper wooden column 12 and the flange portion 94. The lower end of the upper wooden column 12 and the flange portion 94 are joined together by drift pins 38 inserted into the through holes 37, 96, respectively.

[0073] The drift pin 38 is an example of a pin member. The joint structure between the flange portion 94 and the upper wooden column 12 is not limited to a steel plate insertion drift pin joint, and may be other joint structures.

[0074] (Wooden column and beam construction method) Next, an example of a construction method for wooden columns and beams according to this embodiment will be described.

[0075] (Wooden pillar construction process) First, as shown in FIG. 4, in the wooden pillar erecting process, the lower wooden pillar 10 having the slit 30 formed in the joint portion 20J is erected.

[0076] In addition, in Fig. 4, a plurality of lag screw bolts 32 are provided in the joint portion 20J of the lower wooden column 10. These lag screw bolts 32 may be provided in the joint portion 20J before the lower wooden column 10 is erected, or may be provided in the joint portion 20J after the lower wooden column 10 is erected.

[0077] (Wood beam installation process) Next, as shown in FIG. 4, in the wooden beam installation process, guide rods 100 are attached to the upper ends of the multiple lag screw bolts 32 protruding from the upper surface 20U of the joint portion 20J of the lower wooden column 10, respectively.

[0078] The guide rod 100 is, for example, a fully threaded bolt, and its lower end is detachably connected to the upper end of the lag screw bolt 32 via a connector or the like (not shown). The guide rod 100 has approximately the same diameter as the lag screw bolt 32, and can be inserted into a fixing hole 92 formed in a base plate portion 90 of the joining hardware 80.

[0079] The guide rod 100 may be attached to the lag screw bolt 32 before the lower wooden pillar 10 is erected, or may be attached to the lag screw bolt 32 after the lower wooden pillar 10 is erected.

[0080] Next, the wooden beam 40 is lifted up by a lifting machine or the like (not shown), and the joint metal fittings 80 attached to the ends of the wooden beams 40 are lowered onto the joint section 20J of the lower wooden column 10. At this time, the multiple guide rods 100 extending upward from the upper surface 20U of the joint section 20J of the lower wooden column 10 are inserted into the multiple fixing holes 92 formed in the base plate section 90 of the joint metal fittings 80, respectively.

[0081] In this state, the base plate portion 90 of the joint metal 80 is lowered along the multiple guide rods 100, and the pair of gusset plate portions 82A, 82B and the reinforcing plate portion 84 of the joint metal 80 are inserted into the slits 30 formed in the joint portion 20J of the lower wooden column 10. In addition, the base plate portion 90 of the joint metal 80 is placed on and overlapped on the upper surface 20U of the joint portion 20J of the lower wooden column 10.

[0082] 5, the guide rods 100 are removed from each lag screw bolt 32, and the nuts 34 are tightened onto the upper ends of each lag screw bolt 32. This fixes the base plate portion 90 of the joint metal fitting 80 to the joint portion 20J of the lower wooden column 10.

[0083] 2, the gap between the end of the wooden beam 40 and the joint 20J of the lower wooden column 10 is blocked with a fire-resistant covering material 28. Specifically, a wet fire-resistant covering material 28 such as gypsum is poured into the gap between the end of the wooden beam 40 and the joint 20J of the lower wooden column 10 and allowed to harden.

[0084] In addition, the gap between the end of the wooden beam 40 and the joint portion 20J of the lower wooden column 10 may be blocked by fire-resistant covering material 28 at the same time as the gap between the end of the steel beam 60 described below and the joint portion 20J of the lower wooden column 10.

[0085] (Beam installation process) Next, in the beam installation process, the steel beam 60 is lifted by a lifting machine (not shown) or the like, and an end of the steel beam 60 is joined to one end of one gusset plate portion 82A protruding from the side surface 20S1 of the joint portion 20J of the lower wooden column 10. Specifically, the web portion 64 of the steel beam 60 is overlapped with one end of one gusset plate portion 82A and joined with bolts 66 and nuts.

[0086] Next, the gap between the end of the steel beam 60 and the joint 20J of the lower wooden column 10 is closed with a fire-resistant covering material 28. Specifically, a wet fire-resistant covering material 28 such as gypsum is poured into the gap between the end of the steel beam 60 and the joint 20J of the lower wooden column 10 and allowed to harden.

[0087] There is no particular restriction on the order of the wooden beam installation process and the beam installation process, and either process may be performed first, or both may be performed in parallel.

[0088] (Upper wooden pillar construction process) 1, in the upper wooden column erection process, the upper wooden column 12 is lifted by a lifting machine (not shown) or the like and lowered onto the joint 20J of the lower wooden column 10. At this time, the flange 94 protruding upward from the base plate 90 of the joint metal fitting 80 is inserted into the slit 36 ​​formed on the underside of the wood core 20 that constitutes the lower end of the upper wooden column 12, and the underside of the upper wooden column 12 is placed on the upper surface 20U of the joint 20J of the lower wooden column 10 via the base plate 90.

[0089] Next, a plurality of drift pins 38 are inserted into a plurality of through holes 37, 96 (see FIG. 3) formed in the wood core 20 constituting the lower end of the upper wooden column 12 and in the flange portion 94. As a result, the lower end of the upper wooden column 12 is joined to the joint portion 20J of the lower wooden column 10 via the joint metal fitting 80.

[0090] (Slab construction process) Next, in the slab construction process, a bottom formwork (not shown) is laid on the wooden beams 40 and the steel beams 60. Then, with a plurality of slab reinforcements (not shown) arranged on the bottom formwork, slab concrete is poured and hardened. This joins the slab 70. Also, the wood core 20 that constitutes the lower end of the upper wooden column 12 is embedded in the slab 70. In other words, the wood core 20 that constitutes the lower end of the upper wooden column 12 is fire-resistant covered by the slab 70.

[0091] (action) Next, the operation of this embodiment will be described.

[0092] 2 and 3, according to this embodiment, a slit 30 that opens the upper surface 20U and the side surfaces 20S1 and 20S2 is formed in the joint portion 20J of the lower wooden column 10. In addition, the joint metal member 80 has a pair of gusset plate portions 82A and 82B and a base plate portion 90.

[0093] Of the pair of gusset plate portions 82A, 82B, one gusset plate portion 82A is inserted into the slit 30 with one end protruding from the side surface 20S1 of the joint portion 20J that faces the steel beam 60. The steel beam 60 is joined to one end of this one gusset plate portion 82B.

[0094] Of the pair of gusset plate portions 82A, 82B, the other gusset plate portion 82B is inserted into the slit 30 with one end protruding from the side surface 20S2 of the joint portion 20J that faces the wooden beam 40. The wooden beam 40 is joined to one end of the other gusset plate portion 82B.

[0095] By providing multiple gusset plate portions 82A, 82B in the connecting metal fitting 80 in this manner, not only the wooden beam 40 but also the steel beam 60 can be easily connected to the lower wooden column 10.

[0096] 1 and 3, a base plate portion 90 is provided on the upper ends of the pair of gusset plate portions 82A, 82B and the reinforcing plate portion 84. The base plate portion 90 is overlapped on the upper surface 20U of the joint portion 20J of the lower wooden column 10.

[0097] As a result, the load of the wooden beam 40 and the steel beam 60 is distributed and transmitted to the upper surface 20U of the joint 20J of the lower wooden column 10 via the pair of gusset plate portions 82A, 82B and the base plate portion 90. Therefore, the pair of gusset plate portions 82A, 82B are prevented from penetrating into the joint 20J of the lower wooden column 10.

[0098] In addition, the base plate portion 90 is fixed to the upper surface 20U of the joint portion 20J of the lower wooden column 10 by a plurality of lag screw bolts 32. As a result, for example, stress (bending stress, etc.) of the wooden beam 40 and the steel beam 60 is transmitted to the joint portion 20J of the lower wooden column 10 via the pair of gusset plate portions 82A, 82B, the base plate portion 90, and the plurality of lag screw bolts 32. This improves earthquake resistance.

[0099] In addition, a flange portion 94 is provided on the upper surface of the base plate portion 90 of the joint metal fitting 80. The lower end portion of the upper wooden column 12 is joined to this flange portion 94. As a result, the lower end portion of the upper wooden column 12 is joined to the joint portion 20J of the lower wooden column 10 via the joint metal fitting 80.

[0100] By providing a flange portion 94 on the upper surface of the base plate portion 90 of the connecting metal fitting 80 in this manner, the lower wooden column 10 and the upper wooden column 12 can be easily connected via the connecting metal fitting 80.

[0101] Furthermore, as described above, the base plate portion 90 of the joint metal fitting 80 is fixed to the upper surface 20U of the joint portion 20J of the lower wooden column 10 by a plurality of lag screw bolts 32. This allows the pull-out force (bending moment) of the upper wooden column 12 to be transmitted to the lower wooden column 10 via the flange portion 94, the base plate portion 90, and the plurality of lag screw bolts 32. This improves earthquake resistance.

[0102] Here, for example, it is conceivable to drop the wooden beam 40 from above onto a gusset plate protruding from the side 20S2 of the joint portion 20J of the lower wooden column 10, and then insert the gusset plate into a slit formed on the underside of the wooden beam 40 to join them.

[0103] However, forming a slit on the underside of the wooden beam 40 may reduce the design appeal when looking up at the wooden beam 40.

[0104] In contrast, in this embodiment, a slit 30 that opens the upper surface 20U and the side surfaces 20S1, 20S2 is formed in the joint portion 20J of the lower wooden column 10. This allows the gusset plate portions 82A, 82B of the joint metal fitting 80 that is attached in advance to the end portion of the wooden beam 40 to be dropped into the slit 30 of the joint portion 20J of the lower wooden column 10 from above.

[0105] Therefore, there is no need to form a slit on the underside of the wooden beam 40. This prevents the design from being impaired when looking up at the wooden beam 40.

[0106] In this manner, in this embodiment, it is possible to suppress the pair of gusset plate portions 82A, 82B from sinking into the joint portion 20J of the lower wooden column 10, while suppressing a decrease in the design when looking up at the wooden beam 40.

[0107] In this embodiment, in the wooden beam installation process, guide rods 100 are attached to the upper ends of the multiple lag screw bolts 32 protruding from the upper surface 20U of the joint portion 20J of the lower wooden column 10. Then, by lowering the joint metal fittings 80 along the multiple guide rods 100, the pair of gusset plate portions 82A, 82B, the base plate portion 90, and the reinforcing plate portion 84 can be easily inserted into the slits 30 formed in the joint portion 20J of the lower wooden column 10. This improves the workability of the wooden beam 40.

[0108] (Modification) Next, a modification of the above embodiment will be described.

[0109] In the above embodiment, the steel beam 60 is joined to one gusset plate portion 82A of the pair of gusset plate portions 82A, 82B. However, the one gusset plate portion 82A is not limited to the steel beam 60, and may be joined to, for example, a wooden beam, a reinforced concrete beam, or a steel-reinforced concrete beam.

[0110] In the above embodiment, the pair of gusset plate portions 82A, 82B of the joint metal member 80 are arranged in an L-shape in a plan view. However, the pair of gusset plate portions 82A, 82B are not limited to an L-shape in a plan view, and may be arranged, for example, linearly in a plan view.

[0111] Furthermore, at least one gusset plate portion can be provided in the joint metal member 80. Therefore, three gusset plate portions may be arranged in a T-shape in a plan view, and four gusset plate portions may be arranged in a cross shape in a plan view.

[0112] In the above embodiment, the pair of gusset plate portions 82A, 82B are joined to each other. However, the pair of gusset plate portions 82A, 82B may not be joined directly to each other, but may be joined to each other via the base plate portion 90, for example.

[0113] In the above embodiment, the base plate portion 90 of the joint metal fitting 80 is fixed to the joint portion 20J of the lower wooden column 10 by a plurality of lag screw bolts 32. However, the fixing members are not limited to the lag screw bolts 32, and may be wood screws, post-installed anchors, etc. Also, the base plate portion 90 only needs to be fixed to the joint portion 20J of the lower wooden column 10 as necessary, and does not necessarily have to be fixed to the joint portion 20J.

[0114] In the above embodiment, the upper wooden column 12 is joined to the flange portion 94 of the joint metal member 80. However, the flange portion 94 is not limited to a wooden column, and may be joined to, for example, a steel column, a reinforced concrete column, a steel reinforced concrete column, a CFT column, or the like.

[0115] In addition, the flange portion 94 may be provided as necessary and may be omitted as appropriate. For example, on the top floor of a structure, since there is no upper wooden column, the flange portion 94 is omitted.

[0116] In the above embodiment, the lower wooden column 10, the upper wooden column 12, and the wooden beam 40 are fireproof coated with the fireproof coating parts 22, 52. However, the lower wooden column 10, the upper wooden column 12, and the wooden beam 40 may be fireproof coated with other fireproof coating materials such as fireproof paint, without being limited to the fireproof coating parts 22, 52. Furthermore, the fireproof coating parts 22, 52 may be provided as necessary, and may be omitted as appropriate. In other words, the lower wooden column 10, the upper wooden column 12, and the wooden beam 40 are not limited to a fireproof structure, and may be a non-fireproof structure.

[0117] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it is of course possible to implement the present invention in various forms without departing from the gist of the present invention. [Explanation of symbols]

[0118] 10 Lower wooden pillar (wooden pillar) 12 Upper wooden column 20J Joint (joint of wooden pillar) 20S2 Side (side of joint) 20U Top surface (top surface of joint) 30 Slit 32 Lag screw bolt (fixing member) 40 Wood beam 80 Joint metal fittings 82B Gusset plate part 90 Base plate part 94 Flange part

Claims

1. A wooden pillar erection process for erecting a wooden pillar having a slit formed therein that opens the upper surface and the side surface of the joint portion; A wooden beam installation process in which a gusset plate portion protruding from an end face of a wooden beam is inserted into the slit, and a base plate portion joined to an upper end portion of the gusset plate portion is placed on the upper surface of the joint portion; A construction method for wooden columns and beams comprising:

2. A wooden pillar having a slit formed therein that opens the top and sides of the joint; a gusset plate portion having one end protruding from the side surface of the joint portion and inserted into the slit; and a base plate portion provided at an upper end of the gusset plate portion and overlapped on the upper surface of the joint portion; A fixing member that fixes the base plate portion to the joint portion; A wooden beam joined to the one end side of the gusset plate portion; A wooden column-beam joint structure.

3. An upper wooden pole is disposed on the lower wooden pole as the wooden pole, The metal joint is provided on the upper surface of the base plate and has a flange portion to which the upper wooden column is joined. The wooden column-beam joint structure according to claim 2.

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