JP6638905B2 - Beam-column connection structure and beam-column connection method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a beam-column joint structure and a beam-joint method in which a wooden column member and a wooden beam member are joined.

  Conventionally, when joining a wooden column member and a wooden beam member, or a wooden beam member containing a steel material, a steel plate inserted two-side shear type column-beam joint structure using a pull bolt and a drift pin is generally used. (For example, see Patent Documents 1 and 2). As shown in FIG. 3, this conventional beam-column joint structure has a T-shaped cross section in plan view through a plurality of through bolts 2 (pull bolts) and nuts 2a that are horizontally inserted through a wooden pillar member 1 and arranged. The base plate 3a of the metal member 3 for connecting the beam member is attached to the concave portion 1a on the side surface of the pillar 1, and the gusset plate 3b of the metal member 3 for connecting the beam member is inserted and arranged in the concave groove 4a on the end surface of the wooden beam member 4. The gusset plate 3b and the beam member 4 are connected by a connector such as a drift pin 5. In the example shown in the figure, slab concrete 7 is provided on the upper surface of the beam member 4 via a lag screw bolt 6, a wooden plug 8 is embedded and arranged on the end side of the drift pin 5, and a concave portion on the side surface of the column member 1. An example in which a heat insulating material 9 such as a mortar bar is arranged at the edge of 1a is shown.

  However, in such a beam-column joint structure, the rigidity and proof stress caused by the joint are greatly reduced, and the joining efficiency is low. In addition, when planning a frame with a certain number of floors or more, general-purpose details that can be used besides through columns are required. In order to solve the above problem, for example, by adopting a connection member made of a material harder than wood, such as a RC (reinforced concrete) joint, the joining efficiency can be greatly increased (for example, Patent Document 3). See). In this case, the connection between the connection member, the upper column member disposed on the upper end surface of the connection member, and the lower column member disposed on the lower end surface of the connection member is performed using a glue-in rod (hereinafter, referred to as a conventional technology). , GIR.) Although it is effective to use a junction, there are the following problems.

  As shown in FIG. 4 (a), GIR joining of a type in which deformed reinforcing bar A1 is inserted into wood A2 (laminate) and fixed with epoxy adhesive A3 is common in many application examples. Since the force for pushing and spreading the wood A2 acts intensively on the nodes of A1, the wood is easily split and fractured and has brittle properties.

  As shown in FIG. 4B, the screw portion A41 of the steel rod A4 (rolled screw anchor bolt) composed of the screw portion A41 and the round steel portion A42 is inserted into the wood A2, and fixed with the epoxy adhesive A3. It has been experimentally confirmed that this type of GIR joint hardly splits and fractures until the steel bar A4 is sufficiently plastically deformed, and has a tough fracture mode as shown in FIG. FIG. 5 shows a tensile test result when a steel bar (deformed rebar, rolled screw anchor bolt) is fixed by GIR bonding to a length of 500 mm on wood having a cross-sectional dimension of 150 mm × 150 mm.

  In particular, in the case of a pillar having a refractory finish, performing the work of injecting the GIR epoxy-based adhesive on site increases the number of post-processing steps for the finish and requires labor. Therefore, it is realistic to prepare a wooden pillar member in which a GIR steel rod is already inserted at a factory or a site, and only join the steel bars projecting from the upper and lower pillar members in the joint at the time of construction. . However, when the tough screw-shaped steel rod is used, there is a problem that there is no general-purpose means for joining the steel rods fixed respectively to the upper and lower column members.

JP-A-2005-218463 JP 2012-219559 A JP 2012-219560 A

  For this reason, in a beam-column joint structure between a wooden pillar member and a beam member, there is a need for a technique excellent in workability capable of easily integrally joining steel rods respectively fixed to upper and lower pillar members at the joint. Had been.

  The present invention has been made in view of the above, and a beam-column joint structure excellent in workability capable of easily integrally joining steel rods respectively fixed to upper and lower column members of a joint portion, and An object is to provide a column-beam joining method.

  In order to solve the above-mentioned problems and achieve the object, a beam-column joint structure according to the present invention joins a wooden column member and a wooden beam member via a connection member made of a material harder than wood. And a projecting metal member provided on a side end surface of the joint member and connected to the beam member, and an upper column member and a lower column member respectively provided above and below the joint member And a steel rod inserted and arranged in the up and down direction to connect the steel rod, the steel rod comprises a deformed reinforcing bar portion and a screw-shaped screw portion, and the screw portion is inserted and arranged in the upper column member and the lower column member. Here, the deformed reinforcing bar is inserted and arranged in the connection member and joined to the reinforcing bar joint.

  Further, in another column-beam joint structure according to the present invention, in the above-described invention, a deformed reinforcing bar portion of a steel rod inserted and arranged in the upper column member is joined to a reinforcing joint to be joined to the lower column member. It is characterized in that deformed reinforcing bars of steel bars are joined.

  Further, another column-beam joint structure according to the present invention is characterized in that, in the above-described invention, the steel bar is formed by cutting one side in the longitudinal direction of the deformed reinforcing bar into a thread shape.

  Further, another column-beam joint structure according to the present invention is characterized in that, in the above-described invention, the connection member is made of reinforced concrete.

  Further, the beam-to-column joint method according to the present invention is a beam-to-column joint method for constructing the above-described beam-to-column joint structure, wherein a deformed reinforcing bar portion of a steel rod is provided above and below a connection member provided with a reinforcing joint in advance. After arranging the protruding upper column member and lower column member, the deformed reinforcing bar and the reinforcing bar joint are joined.

  ADVANTAGE OF THE INVENTION According to the beam-column joint structure which concerns on this invention, it is a beam-column joint structure which joins a wooden pillar member and a wooden beam member via the connection member which consists of a harder material than wood. A protruding metal member provided on the side end surface of the mouth member and connected to the beam member, and is vertically inserted and arranged to connect the connection member and the upper column member and the lower column member provided respectively above and below the connection member. The steel rod comprises a deformed reinforcing bar and a screw-shaped screw. The screw is inserted into the upper column member and the lower column member, and is fixedly attached thereto. Since it is inserted into the mouth member and joined to the rebar joint, it is easy to integrally join the steel rods adhered and fixed to the upper column member and the lower column member. This has the effect of providing a structure.

  Further, according to another beam-column joint structure according to the present invention, the steel bar inserted into the lower column member is connected to the reinforcing joint to which the deformed reinforcing portion of the steel bar inserted into the upper column member is joined. Since the deformed reinforcing bars are joined, it is possible to reduce the number of reinforcing bar joints.

  Further, according to another beam-column joint structure according to the present invention, since the steel bar is formed by cutting one side in the longitudinal direction of the deformed reinforcing bar into a thread shape, the beam-column joint structure is realized at relatively low cost. It has the effect of being able to do so.

  Further, according to another beam-column joint structure according to the present invention, since the connection member is made of reinforced concrete, there is an effect that the beam-column joint structure can be realized at relatively low cost.

  Further, according to the beam-column joint method according to the present invention, there is provided a beam-column joint method for constructing the above-mentioned beam-column joint structure, wherein a deformed reinforcing bar of a steel rod is provided above and below a connection member provided with a reinforcing bar joint in advance. After arranging the upper column member and the lower column member having the protruding portions, the deformed reinforcing bar portion and the reinforcing bar joint are joined, so that the above-described beam-column joint structure can be relatively easily constructed.

FIG. 1 is a side sectional view showing an embodiment of a beam-column joint structure and a beam-column joint method according to the present invention. FIG. 2 is a side view showing a cutting rebar. FIG. 3 is an exploded perspective view showing an example of a conventional beam-column joint structure. FIGS. 4A and 4B are side sectional views showing GIR joining, in which FIG. 4A shows a case of deformed reinforcing bars, and FIG. 4B shows a case of a threaded steel rod. FIG. 5 is a diagram showing a load-deformation relationship depending on the type of steel rod.

  Hereinafter, embodiments of a beam-column joint structure and a beam-column joint method according to the present invention will be described in detail with reference to the drawings. The present invention is not limited by the embodiment.

  As shown in FIG. 1, a beam-column joint structure 10 according to the present invention includes a wooden member 16 having a rectangular cross section and a wooden member 14 having a rectangular cross section. It is a structure that is joined through the intermediary. A web 16 </ b> A (a protruding hardware) for connecting to the beam member 14 is provided on a side end surface of the connection member 16.

  An upper column member 12A and a lower column member 12B are arranged above and below the connection member 16 via a base mortar 32. Steel rods 22 are vertically inserted at four corners of the connection member 16, the upper column member 12A, and the lower column member 12B in plan view. The example of the figure shows the case of a GIR junction. The steel bar 22 is a cutting reinforcing bar including a deformed reinforcing bar portion 22B and a screw-shaped screw portion 22A. The screw portion 22A is inserted and arranged in the upper column member 12A and the lower column member 12B, and is interposed through an epoxy adhesive or the like. Here, the deformed reinforcing bar portion 22B is inserted and arranged as a main reinforcing bar in the connection member 16 and joined to the reinforcing bar joints 18 and 20. A deformed reinforcing bar 24 is disposed between the reinforcing bar joints 18 and 20. A plurality of hoop bars 28 are wound around the deformed reinforcing bar portion 22 </ b> B inside the connection member 16.

  As described above, in the present embodiment, when connecting the column member 12 and the connection member 16, the cutting bar is used for the GIR steel rod 22. As shown in FIG. 2, the cut rebar is obtained by cutting one side of a deformed rebar into a thread shape. By inserting the screw portion 22A side of the steel rod 22 made of the cutting rebar into the column member 12, splitting and breaking of wood is prevented, and toughness is secured. By inserting one deformed reinforcing bar portion 22B side into the connecting member 16, it is possible to use the ordinary PC (precast concrete) sleeve type reinforcing bar joints 18 and 20 (for example, a sleeve joint), and to construct the joint at the time of construction. In the mouth member 16, the deformed reinforcing bar portion 22B of the cutting reinforcing bar protruding from the upper column member 12A and the lower column member 12B can only be joined. According to this method, the work of injecting the epoxy adhesive at the current position does not occur. In the example of FIG. 1, the rebar joints 18 and 20 are provided at two upper and lower positions in the connection member 16. For example, the deformed rebar portion 22 </ b> B protruding upward from the lower column member 12 </ b> B Can be reduced to one upper part.

  The joint between the connection member 16 and the beam member 14 uses a steel plate insertion two-surface shearing type joint detail (see FIG. 3) using both the pull bolt 34 and the drift pin 38. In FIG. 1, reference numeral 36 denotes a nut, and reference numeral 40 denotes a base plate. Since the connection member 16 is made of RC, it is possible to prevent a decrease in joining efficiency due to the pull bolt 34, and to increase the integrity with the pull bolt 34. It can be expected that the joining efficiency will be increased as compared with the case where is adopted. In order to enhance the adhesion performance of the pull bolt 34 in the connection member 16, the pull bolt 34 may be a full screw bolt or a cutting rebar whose both ends are threaded by a method as shown in FIG. 2.

  In the above embodiment, the connection member 16 may be made of PC (precast concrete). In this case, after the upper column member 12A and the lower column member 12B from which the deformed reinforcing bar portion 22B of the steel bar 22 protrudes are disposed above and below the connection member 16 in which the reinforcing bar joints 18 and 20 are provided in advance, the deformed reinforcing bar portion The beam-column joint structure 10 described above can also be constructed by joining the reinforcing joints 22 and 22B to the rebar joints 18 and 20. When only one reinforcing joint is provided inside the connection member 16 as described above, a hole is formed in the connection member 16 for passing a main reinforcing bar (deformed reinforcing bar portion 22B) in the vertical direction. The grout may be filled after inserting the deformed reinforcing portion 22B.

  As described above, according to the present embodiment, the connection between the column member 12 and the connection member 16 is performed by GIR bonding using the steel rod 22 made of a cutting rebar, thereby having toughness and workability. Excellent detail can be realized. As a result, by securing the rigidity, strength and toughness of the beam-column joint structure 10, seismic elements other than the ramen frame can be reduced, and a high degree of freedom in space can be realized, and at the same time, a wooden space excellent in design can be provided. It is possible to

  Further, as for the cutting rebar, there is a technique of performing a sufficient length of thread cutting on a normal deformed rebar. In the present invention, since all the other details can be configured by the existing technology, it is possible to realize a column-beam joint structure excellent in workability and low in cost. In addition, since the connection of the joints is clear, it is easy to accommodate fireproof specifications such as coating.

  As described above, according to the beam-column joint structure of the present invention, a beam-column joint formed by joining a wooden pillar member and a wooden beam member via a connection member made of a material harder than wood. A structure, provided on the side end surface of the connection member, for projecting hardware for connecting to the beam member, and for connecting the connection member and the upper column member and the lower column member provided respectively above and below the connection member. A steel rod inserted and arranged in the up-down direction, the steel rod comprises a deformed reinforcing bar portion and a screw-shaped screw portion, and the screw portion is inserted and arranged in the upper column member and the lower column member and is adhered and fixed thereto. Since the deformed reinforcing bar is inserted into the connection member and joined to the reinforcing bar joint, the workability can easily integrate the steel bars adhered and fixed respectively to the upper column member and the lower column member. It is possible to provide an excellent column-beam joint structure.

  Further, according to another beam-column joint structure according to the present invention, the steel bar inserted into the lower column member is connected to the reinforcing joint to which the deformed reinforcing portion of the steel bar inserted into the upper column member is joined. Since the deformed reinforcing bars are joined, the number of reinforcing bar joints can be reduced.

  Further, according to another beam-column joint structure according to the present invention, since the steel bar is formed by cutting one side in the longitudinal direction of the deformed reinforcing bar into a thread shape, the beam-column joint structure is realized at relatively low cost. be able to.

  Further, according to another column-beam joint structure according to the present invention, since the connection member is made of reinforced concrete, the column-beam joint structure can be realized at relatively low cost.

  Further, according to the beam-column joint method according to the present invention, there is provided a beam-column joint method for constructing the above-mentioned beam-column joint structure, wherein a deformed reinforcing bar of a steel rod is provided above and below a connection member provided with a reinforcing bar joint in advance. After arranging the upper column member and the lower column member having the protruding portions, the deformed reinforcing bar and the reinforcing bar joint are joined, so that the above-described beam-column joint structure can be constructed relatively easily.

  INDUSTRIAL APPLICABILITY As described above, the beam-column joint structure and the beam-joint method according to the present invention are useful for joining a wooden column member and a wooden beam member, and are particularly fixed to column members above and below the joint. It is suitable for easily joining steel bars together.

DESCRIPTION OF SYMBOLS 10 Column-beam joining structure 12 Column member 12A Upper column member 12B Lower column member 14 Beam member 16 Connection member 16A Web (protruding hardware)
18, 20 Reinforcing joint 22 Steel rod 22A Screw portion 22B Deformed reinforcing bar portion 24 Deformed reinforcing bar 28 Hoop bar 32 Base mortar 34 Pull bolt 36 Nut 38 Drift pin 40 Base plate

Claims (5)

A column-beam joint structure in which a wooden column member and a wooden beam member are joined via a connection member made of a material harder than wood,
A protruding metal member provided on the side end surface of the connection member and connected to the beam member, and vertically inserted and arranged to connect the connection member and upper and lower column members provided above and below the connection member, respectively. With a steel bar
The steel rod comprises a deformed reinforcing bar portion and a screw-shaped screw portion, the screw portion is inserted and arranged in the upper column member and the lower column member and is adhered and fixed here, and the deformed reinforcing bar portion is inserted and disposed in the connection member. A beam-column joint structure characterized by being joined to a reinforcing joint.   The deformed reinforcing bar of a steel rod inserted and arranged in a lower column member is joined to a reinforcing joint to which a deformed reinforcing bar of a steel rod inserted and arranged in an upper column member is joined. Column-beam joint structure as described.   3. The beam-column joint structure according to claim 1, wherein the steel bar is formed by cutting one side in a longitudinal direction of the deformed reinforcing bar into a screw shape. 4.   The beam-column joint structure according to any one of claims 1 to 3, wherein the connection member is made of reinforced concrete. A beam-column joint method for constructing the beam-column joint structure according to any one of claims 1 to 4,
After the upper and lower column members from which the deformed reinforcing bar portion of the steel bar projects above and below the connection member provided with the reinforcing bar joint in advance, the deformed reinforcing bar portion and the reinforcing bar joint are joined. Column and beam joining method.

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