Wooden column concrete beam construction method, and wooden column concrete beam joint structure

Abstract

To reduce labor required for joining a wooden column to a concrete beam while reducing bending acting on the wooden column.SOLUTION: A construction method of wooden columns and concrete beams includes: a concrete beam placement process in which the beam joint port part 52 of a precast concrete beam 50 is placed on the upper surface 30U of a lower wooden column 30 and a lower joint pin 40 protruding from the upper surface 30U of the lower wooden column 30 is inserted into a through hole 64 that penetrates the beam joint port part 52 in the beam formation direction; an upper wooden column placement process in which an upper wooden column 70 is placed on the upper surface 52U of the beam joint port part 52 and an upper joint pin 80 protruding from the lower surface 70 L of the upper wooden column 70 is inserted into the through hole 64; and a filling process in which a filling material M is filled into the joint 62 between the lower wooden column 30 and the beam joint port part 52, and the filling material M is filled into the joint 68 between the beam joint 52 and the upper wooden column 70 via the through hole 64.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a construction method for a wooden column and a concrete beam, and a joint structure between a wooden column and a concrete beam.

Background Art

[0002] A joint structure between a flat slab and a wooden column is known (see, for example, Patent Document 1).

[0003] A joint structure between a column and a beam made of steel-reinforced concrete and a wooden seismic wall is known (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, for example, in a structure made of reinforced concrete or steel-reinforced concrete, from the viewpoint of designability and the like, it is conceivable to use a wooden column as the column. In this case, it is necessary to join a concrete beam made of reinforced concrete or steel-reinforced concrete and a wooden column.

[0006] However, when joining a concrete beam and a wooden column and making the wooden column bear a large bending moment, the wooden column may be damaged, and the joining work between the wooden column and the concrete beam may be troublesome.

[0007] In consideration of the above facts, an object of the present invention is to reduce the bending moment acting on the wooden column and reduce the labor of the joining work between the wooden column and the concrete beam.

Means for Solving the Problems

[0008] The construction method of the wooden column and concrete beam according to claim 1 comprises a concrete beam installation step of installing a beam joint portion of a precast concrete beam on the upper surface of the lower wooden column, and inserting a lower joint pin protruding from the upper surface of the lower wooden column into a through hole penetrating the beam joint portion in the beam forming direction; an upper wooden column installation step of installing an upper wooden column on the upper surface of the beam joint portion, and inserting an upper joint pin protruding from the lower surface of the upper wooden column into the through hole; and a filling step of filling a filler into the joint between the lower wooden column and the beam joint portion, and filling the filler into the joint between the beam joint portion and the upper wooden column through the through hole.

[0009] According to the construction method of the wooden column and concrete beam according to claim 1, first, in the concrete beam installation step, a beam joint portion of a precast concrete beam is installed on the upper surface of the lower wooden column, and a lower joint pin protruding from the upper surface of the lower wooden column is inserted into a through hole penetrating the beam joint portion in the beam forming direction. Next, in the upper wooden column installation step, an upper wooden column is installed on the upper surface of the beam joint portion, and an upper joint pin protruding from the lower surface of the upper wooden column is inserted into the through hole. Next, in the filling step, a filler is filled into the joint between the lower wooden column and the beam joint portion, and the filler is filled into the joint between the beam joint portion and the upper wooden column through the through hole.

[0010] Thereby, the lower wooden column and the beam joint portion of the precast concrete beam are pin-jointed via the lower joint pin, and the upper wooden column and the beam joint portion of the precast concrete beam are pin-jointed via the upper joint pin. Therefore, the bending acting on the lower wooden column and the upper wooden column is reduced.

[0011] In addition, when a filler is filled into the joint between the lower wooden column and the beam joint portion, the through hole and the joint between the beam joint portion and the upper wooden column through the through hole are also filled with the filler, so that the workability is improved.

[0012] Thus, in the present invention, it is possible to reduce the bending acting on the wooden column while reducing the labor of the joining work between the wooden column and the concrete beam.

[0013] The construction method of the wooden column and concrete beam according to claim 2 is the construction method of the wooden column and concrete beam according to claim 1, wherein the lower part of the lower joining pin is fixed to the lower wooden column by a fixing pin penetrating the lower part in the width direction of the lower wooden column, and the upper part of the upper joining pin is fixed to the upper wooden column by a fixing pin penetrating the upper part in the width direction of the upper wooden column.

[0014] According to the construction method of the wooden column and concrete beam according to claim 2, the lower part of the lower joining pin is fixed to the lower wooden column by a fixing pin penetrating the lower part in the width direction of the lower wooden column. Thereby, the lower joining pin can be easily fixed to the lower wooden column.

[0015] Similarly, the upper part of the upper joining pin is fixed to the upper wooden column by a fixing pin penetrating the upper part in the width direction of the upper wooden column. Thereby, the upper joining pin can be easily fixed to the upper wooden column.

[0016] The joining structure of the wooden column and concrete beam according to claim 3 includes a lower wooden column with a lower joining pin protruding from the upper surface, a precast concrete beam installed on the upper surface of the lower wooden column and having a through-hole formed therein for inserting the lower joining pin in the beam forming direction, an upper wooden column installed on the upper surface of the beam mouth portion and having an upper joining pin inserted into the through-hole protruding from the lower surface, a joint between the lower wooden column and the beam mouth portion, the through-hole, and a filler filled in the joint between the beam mouth portion and the upper wooden column.

[0017] According to the joining structure of the wooden column and the concrete beam according to claim 3, in the lower wooden column, the lower joining pin protrudes from the upper surface. Further, the precast concrete beam has a beam joint portion that is installed on the upper surface of the lower wooden column. In the beam joint portion, a through hole is formed into which the lower joining pin is inserted in the beam forming direction. On the upper surface of this beam joint portion, the upper wooden column is installed. From the lower surface of the upper wooden column, an upper joining pin that is inserted into the through hole of the beam joint portion protrudes. Then, the joints between the lower wooden column and the beam joint portion, the through hole, and the joints between the beam joint portion and the upper wooden column are filled with a filler.

[0018] As a result, the lower wooden column and the beam joint portion of the precast concrete beam are pin-joined via the lower joining pin, and the upper wooden column and the beam joint portion of the precast concrete beam are pin-joined via the upper joining pin. Therefore, the bending acting on the lower wooden column and the upper wooden column is reduced.

[0019] In addition, when the joint between the lower wooden column and the beam joint portion is filled with a filler, the through hole and the joints between the beam joint portion and the upper wooden column via the through hole are also filled with the filler, so the workability is improved.

[0020] Thus, in the present invention, it is possible to reduce the bending acting on the wooden column while reducing the labor of the joining work between the wooden column and the concrete beam.

Effects of the Invention

[0021] As described above, according to the present invention, it is possible to reduce the bending acting on the wooden column while reducing the labor of the joining work between the wooden column and the concrete beam.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0023] Hereinafter, an embodiment will be described with reference to the drawings.

[0024] (Structure) In Fig. 1, a structure 10 to which a joining structure of a wooden column and a concrete beam is applied is shown. The structure 10 is, as an example, a center core structure. This structure 10 includes a core 20, a plurality of lower wooden columns 30 (see Fig. 2), a plurality of precast concrete beams 50, a plurality of upper wooden columns 70, and a slab 12.

[0025] Note that the structure 10 is not limited to a center core structure, and may be an eccentric core structure. Further, the structure 10 is not limited to a core structure, and may be another structure.

[0026] In the core 20, for example, seismic elements such as seismic walls, utility parts such as stairs and elevators, and equipment parts such as piping and air conditioning are integrated. This core 20 is arranged at substantially the center of the structure 10 in plan view. Further, the core 20 is formed in a cylindrical shape with a rectangular cross section and is arranged over a plurality of layers of the structure 10. This core 20 has four core walls 22. These core walls 22 constitute, as an example, continuous layer seismic walls.

[0027] A plurality of lower wooden columns 30 (see Fig. 2), a plurality of upper wooden columns 70, and a plurality of precast concrete beams 50 are arranged on the outer peripheral portion of the structure 10.

[0028] The plurality of lower wooden columns 30 and the plurality of upper wooden columns 70 constitute the outer peripheral columns of the structure 10. These lower wooden columns 30 and upper wooden columns 70 are arranged at intervals in the circumferential direction of the structure 10 and support the precast concrete beams 50.

[0029] The precast concrete beams (hereinafter also referred to as "precast beams") 50 constitute the outer peripheral beams of the structure 10 and are arranged along the outer peripheral portion of the structure 10. Further, the plurality of precast beams 50 are joined in a rectangular shape in plan view and surround the core 20. A slab 12 is installed between these precast beams 50 and the core 20.

[0030] The precast beam 50 is a continuous beam. This precast beam 50 has a beam joint portion 52 and a beam portion 54 extending from the beam joint portion 52. The lower wooden column 30 (see FIG. 2) and the upper wooden column 70 are joined to the beam joint portion 52.

[0031] (Joint structure of wooden column and concrete beam) Next, the joint structure of the wooden column and the concrete beam according to the present embodiment will be described.

[0032] (Lower wooden column) As shown in FIGS. 2 and 3, the lower wooden column 30 is formed of a wooden material such as laminated wood and constitutes the outer peripheral column of the structure 10. Further, the lower wooden column 30 is formed in a prismatic shape as an example and has four side surfaces 30S (see FIG. 3).

[0033] As shown in FIG. 2, the lower wooden column 30 is installed under the beam joint portion 52 of the precast beam 50, and its upper end portion is pin - joined to the beam joint portion 52. Specifically, an insertion hole 32 is formed at the center of the upper surface 30U of the lower wooden column 30.

[0034] The insertion hole 32 is a circular hole with a bottom. The lower part of the lower joining pin 40, which will be described later, is inserted into this insertion hole 32. Further, a pair of fixing holes 34 are formed on the side surface 30S of the upper end portion of the lower wooden column 30.

[0035] The pair of fixing holes 34 are circular through-holes that penetrate the lower wooden column 30 and the insertion hole 32 in the width direction. Also, in a plan view, the pair of fixing holes 34 intersect (are orthogonal) with each other and are arranged offset in the material axis direction of the lower wooden column 30.

[0036] (Lower joining pin) The lower joining pin 40 is formed in a rod shape by, for example, a round steel bar or the like, and its lower part is inserted into the insertion hole 32. Also, the upper part of the lower joining pin 40 protrudes upward from the upper surface 30U of the lower wooden column 30 and is inserted into the lower part of the through-hole 64 of the beam joint portion 52, which will be described later. A male thread is formed on the upper part of this lower joining pin 40. On the other hand, a pair of fixing holes 42 are formed in the lower part of the lower joining pin 40.

[0037] Note that the male thread on the upper part of the lower joining pin 40 may be provided as necessary and can be omitted as appropriate.

[0038] The pair of fixing holes 42 are circular through-holes that penetrate the lower joining pin 40 in the width direction (radial direction). Also, in a plan view, the pair of fixing holes 42 intersect (are orthogonal) with each other and are arranged offset in the axial direction of the lower joining pin 40. A pair of fixing pins 44 are inserted into this pair of fixing holes 42.

[0039] (Fixing pin) The pair of fixing pins 44 are formed in a rod shape by, for example, drift pins or the like. Also, the pair of fixing pins 44 are inserted into a pair of fixing holes 34 and 42 formed in the lower wooden column 30 and the lower joining pin 40, respectively. By this pair of fixing pins 44, the lower joining pin 40 is fixed to the lower wooden column 30.

[0040] Note that the lower joint pin 40 is not limited to the pair of fixing pins 44, and may be fixed to the lower wooden column 30 by other fixing methods such as an adhesive or the like.

[0041] (Fireproof coating material) The lower wooden column 30 is fireproof coated with a fireproof coating material 36. The fireproof coating material 36 is, as an example, a fireproof board, and is attached to each side surface 30S of the lower wooden column 30. In this embodiment, three fireproof coating materials 36 are laminated and attached to each side surface 30S of the lower wooden column 30. The fireproof performance of the lower wooden column 30 is ensured by these fireproof coating materials 36, and the pair of fixing pins 44 is concealed.

[0042] Note that the fireproof coating material 36 is not limited to a fireproof board, and may be other fireproof coating materials such as a char layer or a fireproof paint. Further, the fireproof coating material 36 may be provided as necessary and can be omitted as appropriate.

[0043] (Precast concrete beam) The precast beam 50 is made of reinforced concrete, and a plurality of main beam reinforcement bars 56 and shear reinforcement bars 58 are embedded therein. Further, the precast beam 50 is formed of precast concrete and is manufactured, for example, at a factory or a site yard.

[0044] Note that the precast beam 50 is not limited to a reinforced concrete structure, and may be a steel-reinforced concrete structure.

[0045] The beam joint portion 52 of the precast beam 50 is placed on the upper surface 30U of the lower wooden column 30 via a spacer 60 (see FIG. 6). Further, a filler (cement-based filler) M such as mortar or grout is filled in the joint 62 between the lower surface 52L of the beam joint portion 52 and the upper surface 30U of the lower wooden column 30. A through hole 64 is formed in the central portion of the beam joint portion 52.

[0046] The through-hole 64 is formed in a circular shape and penetrates the central portion of the beam joint portion 52 in the beam forming direction. This through-hole 64 is formed, for example, by embedding a winding pipe or a sleeve in the beam joint portion 52.

[0047] At the lower part of the through-hole 64, the upper part of the lower joint pin 40 protruding from the upper surface 30U of the lower wooden column 30 is inserted. Also, at the upper part of the through-hole 64, the lower part of the upper joint pin 80, which will be described later, is inserted. This through-hole 64 is filled with a filler M.

[0048] (Upper wooden column) The upper wooden column 70 is formed of a wooden material such as laminated wood and constitutes the outer peripheral column of the structure 10. Also, as an example, the upper wooden column 70 is formed in a prismatic shape and has four side surfaces 70S. The upper wooden column 70 is installed on the beam joint portion 52 of the precast beam 50, and its lower end is pin-jointed to the beam joint portion 52.

[0049] Specifically, the lower surface 70L of the upper wooden column 70 is placed on the upper surface 52U of the beam joint portion 52 via a spacer 66 (see FIG. 6). Also, the joint 68 between the upper surface 52U of the beam joint portion 52 and the lower surface 70L of the upper wooden column 70 is filled with a filler M.

[0050] An insertion hole 72 is formed at the central portion of the lower surface 70L of the upper wooden column 70. The insertion hole 72 is a circular hole with a bottom. The upper part of the upper joint pin 80 is inserted into this insertion hole 72. Also, a pair of fixing holes 74 are formed on the side surface 70S at the lower end of the upper wooden column 70.

[0051] The pair of fixing holes 74 are circular through-holes that penetrate the upper wooden column 70 and the insertion hole 72 in the width direction. Also, in a plan view, the pair of fixing holes 74 intersect (are orthogonal) with each other and are arranged offset in the material axis direction of the upper wooden column 70.

[0052] (Upper joint pin) The upper joining pin 80 is formed in a rod shape, for example, by a round steel bar or the like, and its upper part is inserted into the insertion hole 72. Further, the lower part of the upper joining pin 80 protrudes downward from the lower surface 70L of the upper wooden column 70 and is inserted into the upper part of the through hole 64 of the beam joint part 52. A male screw is formed on the lower part of the upper joining pin 80. On the other hand, a pair of fixing holes 82 are formed in the upper part of the upper joining pin 80.

[0053] Note that the male screw in the upper part of the upper joining pin 80 may be provided as necessary and can be omitted as appropriate.

[0054] The pair of fixing holes 82 are circular through holes penetrating the upper joining pin 80 in the width direction (radial direction). Also, in a plan view, the pair of fixing holes 82 intersect (are orthogonal) with each other and are arranged offset in the axial direction of the upper joining pin 80. A pair of fixing pins 84 are inserted into the pair of fixing holes 82.

[0055] (Fixing pin) The pair of fixing pins 84 are formed in a rod shape, for example, by drift pins or the like. Also, the pair of fixing pins 84 are respectively inserted into a pair of fixing holes 74, 82 formed in the upper wooden column 70 and the upper joining pin 80. The upper joining pin 80 is fixed to the upper wooden column 70 by the pair of fixing pins 84.

[0056] Note that the upper joining pin 80 is not limited to the pair of fixing pins 84 and may be fixed to the upper wooden column 70 by other fixing methods such as an adhesive.

[0057] (Fireproof coating material) The upper wooden column 70 is fireproof coated with a fireproof coating material 76. The fireproof coating material 76 is, for example, a fireproof board and is attached to each side surface 70S of the upper wooden column 70. In this embodiment, three fireproof coating materials 76 are stacked and attached to each side surface 70S of the upper wooden column 70. The fireproof performance of the upper wooden column 70 is ensured by these fireproof coating materials 76, and the pair of fixing pins 84 are concealed.

[0058] Note that the fire-resistant coating material 76 is not limited to a fire-resistant board, and may be other fire-resistant coating materials such as a char layer or a fire-resistant paint. Further, the fire-resistant coating material 76 may be provided as necessary and can be omitted as appropriate.

[0059] (Construction method of wooden column and concrete beam) Next, an example of the construction method of the wooden column and concrete beam according to the present embodiment will be described.

[0060] (Lower wooden column installation step) As shown in FIG. 4, first, in the lower wooden column installation step, the lower wooden column 30 is lifted by a hoist or the like (not shown), and the lower wooden column 30 is erected on the outer peripheral portion of the structure 10.

[0061] Note that the lower joint pin 40 may be fixed to the upper end portion of the lower wooden column 30 by a pair of fixing pins 44 before the lower wooden column 30 is erected, or may be fixed to the upper end portion of the lower wooden column 30 by a pair of fixing pins 44 after the lower wooden column 30 is erected.

[0062] (Concrete beam installation step) Next, as shown in FIGS. 4 and 5, in the concrete beam installation step, the beam joint portion 52 of the precast beam 50 is installed on the upper surface 30U of the lower wooden column 30.

[0063] Specifically, the precast beam 50 is lifted by a hoist or the like (not shown), and the beam joint portion 52 of the precast beam is placed on the upper surface 30U of the lower wooden column 30 via the spacer 60. At this time, the lower joint pin 40 protruding from the upper surface 30U of the lower wooden column 30 is inserted into the through hole 64 penetrating the beam joint portion 52 in the beam forming direction.

[0064] (Upper wooden column installation step) Next, as shown in FIGS. 5 and 6, in the upper wooden column installation step, the upper wooden column 70 is installed on the upper surface 52U of the beam joint portion 52. Specifically, the upper wooden column 70 is lifted by a hoist or the like (not shown), and the lower surface 70L of the upper wooden column 70 is placed on the upper surface 52U of the beam joint portion 52 via the spacer 66. At this time, the upper joint pin 80 protruding from the lower surface 70L of the upper wooden column 70 is inserted into the through hole 64.

[0065] Note that the upper joint pin 80 is fixed to the lower end portion of the upper wooden column 70 by a pair of fixing pins 84 before the installation of the upper wooden column 70.

[0066] (Filling step) Next, as shown in FIG. 2, in the filling step, the joint 62 between the lower wooden column 30 and the beam joint portion 52 is filled with the filler M, and the joint 68 between the beam joint portion 52 and the upper wooden column 70 is filled with the filler M through the through hole 64.

[0067] (Fireproof coating step) Next, in the fireproof coating step, the side surface 30S of the lower wooden column 30 is fireproof coated with the fireproof coating material 36, and the side surface 70S of the upper wooden column 70 is fireproof coated with the fireproof coating material 76.

[0068] Note that the fireproof coating step of fireproof coating the side surface 30S of the lower wooden column 30 with the fireproof coating material 36 is not limited to after the filling step, and can be carried out after the lower wooden column installation step.

[0069] (Function and effect) Next, the function and effect of the present embodiment will be described.

[0070] According to the present embodiment, as described above, in the concrete beam installation step, the beam joint portion 52 of the precast beam 50 is installed on the upper surface 30U of the lower wooden column 30, and the lower joint pin 40 protruding from the upper surface 30U of the lower wooden column 30 is inserted into the through hole 64 that penetrates the beam joint portion 52 in the beam forming direction.

[0071] Next, in the upper wooden column installation step, the upper wooden column 70 is installed on the upper surface 52U of the beam joint portion 52, and the upper joint pin 80 protruding from the lower surface 70L of the upper wooden column 70 is inserted into the through hole 64. Next, in the filling step, the joint 62 between the lower wooden column 30 and the beam joint portion 52 is filled with the filler M, and the joint 68 between the beam joint portion 52 and the upper wooden column 70 is filled with the filler M through the through hole 64.

[0072] As a result, the lower wooden column 30 and the beam joint portion 52 of the precast beam 50 are pin-jointed via the lower joint pin 40, and the upper wooden column 70 and the beam joint portion 52 of the precast beam 50 are pin-jointed via the upper joint pin 80. Therefore, the bending acting on the lower wooden column 30 and the upper wooden column 70 is reduced.

[0073] Further, when the joint 62 between the lower wooden column 30 and the beam joint portion 52 is filled with the filler M, the through hole 64 and the joint 68 between the beam joint portion 52 and the upper wooden column 70 via the through hole 64 are also filled with the filler M, so that the workability is improved.

[0074] Thus, in this embodiment, while reducing the bending acting on the lower wooden column 30 and the upper wooden column 70, it is possible to reduce the labor of the joining work between the lower wooden column 30 and the upper wooden column 70 and the precast beam 50.

[0075] Further, the lower part of the lower joint pin 40 is fixed to the lower wooden column 30 by a fixing pin 44 that penetrates the lower part in the width direction of the lower wooden column 30. Thereby, the lower joint pin 40 can be easily fixed to the lower wooden column 30.

[0076] Similarly, the upper part of the upper joint pin 80 is fixed to the upper wooden column 70 by a fixing pin 84 that penetrates the upper part in the width direction of the upper wooden column 70. Thereby, the upper joint pin 80 can be easily fixed to the upper wooden column 70.

[0077] As described above, one embodiment of the present invention has been explained. However, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in appropriate combination, and of course, it can be implemented in various modes without departing from the gist of the present invention.

Explanation of Signs

[0078] 30 Lower wooden column 30U Upper surface 40 Lower joining pin 44 Fixing pin 50 Precast concrete beam 52 Beam joint part 52L Lower surface 52U Upper surface 62 Joint 64 Through hole 68 Joint 70 Upper wooden column 70L Lower surface 80 Upper joining pin 84 Fixing pin M Filling material

Claims

1. A concrete beam installation step of installing a beam joint portion of a precast concrete beam on the upper surface of a lower wooden column, and inserting a lower joining pin protruding from the upper surface of the lower wooden column into a through hole penetrating the beam joint portion in the beam forming direction; An upper wooden column installation step of installing an upper wooden column on the upper surface of the beam joint portion, and inserting an upper joining pin protruding from the lower surface of the upper wooden column into the through hole; A filling step of filling a joint between the lower wooden column and the beam joint portion with a filler, and filling a joint between the beam joint portion and the upper wooden column through the through hole with the filler; A construction method for a wooden column concrete beam comprising the above steps.

2. The lower part of the lower joining pin is fixed to the lower wooden column by a fixing pin penetrating the lower part in the width direction of the lower wooden column, The upper part of the upper joining pin is fixed to the upper wooden column by a fixing pin penetrating the upper part in the width direction of the upper wooden column, The construction method for a wooden column concrete beam according to Claim 1.

3. A lower wooden column with a lower joining pin protruding from the upper surface; A precast concrete beam having a beam joint portion installed on the upper surface of the lower wooden column and formed with a through hole into which the lower joining pin is inserted in the beam forming direction; An upper wooden column installed on the upper surface of the beam joint portion and having an upper joining pin inserted into the through hole protruding from the lower surface; A joint structure of a wooden column concrete beam comprising a joint between the lower wooden column and the beam joint portion, the through hole, and a filler filled in a joint between the beam joint portion and the upper wooden column; A joining structure for a wooden column concrete beam comprising the above components.

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