JP2017106285A - Column joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column joint structure which dispenses with an exclusive member and which has high bonding strength.SOLUTION: A column joint structure 10 includes: a wooden pole 40 that has a joint hole 48 formed on an end surface; a steel column 50 that has an end inserted into the joint hole 48; and a filler G that is infilled into a clearance between a hole wall 48B of the joint hole 48 and the steel column 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column joint structure.

  The following Patent Document 1 discloses a wooden framework in which pillar-to-pillar joints are constructed using metal or plastic joints.

JP 2006-348464 A

  However, according to the above-mentioned Patent Document 1, since a plurality of dedicated members are used to form the column joints, the accommodation is complicated. In addition, if the accommodation is complicated, construction errors and the like are likely to occur, the joints may be loosened or loose, and the joint strength may be reduced.

  In view of the above facts, an object of the present invention is to provide a column joint structure that does not require a dedicated member and has high joint strength.

  The column joint structure according to claim 1 includes a wooden column having a joint hole formed at an end surface, a steel column having an end inserted into the joint hole, and a gap between a hole wall of the joint hole and the steel column. And a filler filled in.

  According to the column joining structure of the first aspect, since the end of the steel column is embedded in the wooden pole to form the joined portion, a dedicated joint member is not required. For this reason, the storage is simple and construction errors are unlikely to occur. Even if a construction error occurs, since there is a gap between the hole wall of the joint hole and the steel column, the error can be absorbed by shifting the steel column. Further, since the gap is filled with the filler, it is difficult for the joint portion to loosen or play. Therefore, compared with the case where a steel column and a wooden column are joined using a dedicated joint member, the joint strength of the joint portion is large.

  In addition, since the end of the steel column is embedded in the wooden column, the joint is rigidly connected, and the wooden column and the steel column can transmit stress and bending moment to each other. Therefore, for example, the joint strength of the joint portion is higher than that of the pin joint that joins a wooden pillar and a steel pillar with a gusset plate or the like.

  In addition, steel columns have high strength (compression strength, bending strength, tensile strength compared with the same cross-sectional area) compared to wooden columns, so they are materials with a smaller cross-sectional area than wooden columns, which are equivalent to or better than wooden columns. Strength can be obtained. Therefore, for example, compared with a case where a wooden column having the same cross-sectional area as the steel column is inserted into the joint hole, the steel column is not easily damaged even if a bending moment acts on the joint portion, for example.

  Thus, since a column joint structure with high joint strength can be constructed without using a dedicated joint member, it is possible to easily construct a column joint structure that switches the structure type between the upper and lower floors of a building.

  The column junction structure according to claim 2 is the column junction structure according to claim 1, wherein the wooden column covers a core material that supports a load, a flame stop layer that covers the core material, and the flame stop layer. And a burning allowance layer.

  According to the column junction structure of claim 2, in the event of a fire, the burning allowance layer gradually burns to form a carbonized layer having heat insulation properties. Thereby, the penetration | invasion (heat transfer) of the heat | fever to a core material is suppressed. Furthermore, the burning of the burning allowance layer can be stopped by the non-burning layer disposed inside the burning allowance layer. Thereby, combustion of the core material arrange | positioned inside the flame-stopping layer is avoided or suppressed. Therefore, the fire resistance performance of the column junction structure is improved.

  A column joint structure according to a third aspect is the column joint structure according to the second aspect, wherein the steel column is H-shaped steel, and a cross-section of the joint hole is H-shaped and formed in the core member.

  According to the column joint structure of the third aspect, since the steel column is made of H-shaped steel, the cross-sectional defect of the core material is small as compared with, for example, a steel pipe. For this reason, the intensity | strength of a junction part can be enlarged.

  Further, since the joining hole is formed in the core material, the non-stop layer and the burn-up layer covering the core material can be extended to the steel column, and the steel column can be covered in the same manner as the core material. For this reason, a steel frame pillar can be made into the same finishing as a wooden pillar, and design nature can be improved.

  According to the column joint structure according to the present invention, it is possible to provide a column joint structure that requires no dedicated member and has high joint strength.

(A) is an elevational half sectional view of the column joint structure according to the first embodiment of the present invention, (B) is a plan sectional view taken along the line BB of the wooden pillar, and (C) is a C- FIG. It is an elevation sectional view of the column junction structure concerning a 2nd embodiment of the present invention. (A) is a plane sectional view of the joint hole portion of the column joint structure according to the first embodiment of the present invention, and (B) is a joint hole of the column joint structure according to a modification in which the core material is a half-cut material. It is a plane sectional view of a part, (C) is a plane sectional view of a joint hole part of a column connection structure concerning a modification by which a steel column was made into H-section steel, and (D) is an external dimension of a steel column and wood It is a plane sectional view of the joint hole part of the column junction structure concerning the modification with which the external dimension of the core material of a column was made the same.

[First Embodiment]
Hereinafter, the column junction structure 10 of 1st Embodiment is demonstrated, referring drawings. As shown in FIG. 1 (A), the column joint structure 10 of the first embodiment includes a wooden structure 40 having a wooden structure 20 in the lower layer and a steel frame 30 in the upper layer. The present invention is applied to a joint portion between the steel frame 30 and the steel column 50.

(Timber frame)
The wooden frame 20 includes a wooden pole 40 and a beam 60 joined to the wooden pole 40 via an angle member 72.

  The wooden pillar 40 includes a wooden core member 42 that supports the load of the steel frame 30, a burning stop layer 44 that covers the core member 42, and a wooden burning allowance layer 46 that covers the burning stop layer 44. Yes. As shown in the cross-sectional view of FIG. 1 (B), the flame stop layer 44 is composed of alternating plate members 44A made of mortar, which is a material having a larger heat capacity than wood, and plate members 44B made of wood. Are arranged and formed.

As shown in the cross-sectional view of FIG. 1C, the beam 60 also includes a wooden core member 62, and a flame stop layer 64 (a mortar plate member 64A, a wooden plate member 64B) covering the core member 62, And a wood burning allowance layer 66 covering the dead end layer 64.
A slab 68 made of reinforced concrete having a large heat capacity is placed on the upper surface of the core material 62, and the flame stop layer 64 and the burn allowance layer 66 are not formed on the upper surface of the core material 62. Although the slab 68 is made of reinforced concrete, for example, a deck slab using a deck plate, a wooden floor slab combining a joist and a floor board, or the like may be used. In the case where the slab is a wooden floor board, in order to improve fire resistance, the flame stop layer 64 and the burn allowance layer 66 can also be formed on the upper surface of the beam 60.

  The wooden pillar 40 and the beam 60 are joined via a steel angle member 72 with the end face of the core member 62 of the beam 60 abutting against the side surface of the core member 42 of the wooden pillar 40. Further, the angle members 72 facing each other with the core member 42 interposed therebetween are fastened using a through bolt 72A and a nut 72B. The angle member 72 is attached to the surface of the core members 42 and 62 and is covered with a burn-in allowance layer. In addition, a heat insulating material M is filled in a gap between the end portion of the burn-out stop layer 44 and the burn-in allowance layer 46 and the beam 60 at a joint portion between the wooden column 40 and the beam 60, and heat is directly transmitted to the core material 42. That is restrained.

  In addition, the above-mentioned timber refers to, for example, timber and laminated timber generally used for wooden construction, such as rice pine, karamatsu, cypress, cedar, and asunaro. Indicates that it is made of laminated wood.

  Further, the flame stop layer 64 is made of a material having flame retardancy (such as a flame retardant chemical-injected wood in which a flame retardant is injected into wood and incombustible), or a material capable of absorbing heat (of a heat capacity). Woods such as large mortar, stone, glass, fiber reinforced cement, gypsum and other inorganic materials and various metal materials, such as calcium silicate board with high thermal insulation, rock wool and glass wool, etc. that have high thermal inertia, such as selangan batu, jala and bongoshi Etc.).

  In the present embodiment, the beam 60 is made of wood, but may be made of steel, for example. That is, the wooden frame is a general term for a frame whose pillar is made of wood.

(Steel frame)
The steel frame 30 includes a steel column 50 made of CFT (concrete-filled steel pipe) and an H-shaped steel beam 52 joined to the steel column 50.

  The steel column 50 and the beam 52 are joined by welding the diaphragm 50A of the steel column 50 and the flange 52A of the beam 52, and welding the side surface 50B of the steel column 50 and the web 52B of the beam 52. Further, a slab 54 made of reinforced concrete is bridged over the beam 52.

  The beam 52 is fire-resistant coated with spray rock wool (not shown), and the steel column 50 is omitted from the fire-resistant coating because the concrete inside the steel pipe exhibits fire resistance. Thereby, the fireproof performance of the whole building 100 is improved.

(Column junction structure)
The column joining structure 10 of the wooden pillar 40 and the steel pillar 50 is formed by inserting the lower end portion 50 </ b> C of the steel pillar 50 into the joining hole 48 formed in the upper end surface of the core member 42 of the wooden pillar 40. The joint hole 48 is a bottomed hole formed by hollowing out the upper end surface of the core member 42 into a rectangular shape. It is transmitted to the core material 42 of the column 40. Thereby, the wooden frame 20 and the steel frame 30 are integrated. In order to transmit the axial force evenly to the bottom surface 48 </ b> A, a supporting plate or the like may be provided on the lower end surface 50 </ b> D of the steel column 50.

  There is a gap between the hole wall 48B of the joint hole 48 and the side surface 50B of the lower end 50C of the steel column 50, and the gap G is filled with the filler G. As the material of the filler G, various materials such as non-shrink mortar, polymer cement mortar, and epoxy resin can be used. The filler G may be applied to either or both of the side surface 50B of the steel column 50 and the hole wall 48B of the joint hole 48 before the steel column 50 is inserted into the joint hole 48. May be injected from the gap between the side surface 50B and the hole wall 48B. Further, before the filler G is cured, the axial positions of the steel column 50 and the wooden column 40 can be adjusted after the steel column 50 is inserted into the joint hole 48.

  The beam 52 of the steel frame 30 is in contact with the upper end surface of the wooden pillar 40. In the present embodiment, since the vertical load of the steel frame 30 is transmitted from the steel column 50 to the bottom surface 48A of the joint hole 48 of the wooden column 40 (core material 42), it is vertical from the beam 52 to the core material 42 of the wooden column 40. The load is not transmitted. However, for example, when the core member 42 is compressed and deformed in the axial direction over a long period of time, the vertical load of the steel frame 30 can be transmitted from the beam 52 to the core member 42. Note that the heat insulating material M is filled in the gaps between the burn-out layer 44 and the burn-off layer 46 of the wooden pillar 40 and the joint portion of the beam 60, and heat is prevented from entering the core material 42.

(Function and effect)
According to the column joint structure 10 of the first embodiment, axial force is transmitted from the steel column 50 to the bottom surface 48A of the joint hole 48 of the wooden column 40 (core material 42). Further, due to the shear resistance of the filler G, the axial force is transmitted from the side surface 50B of the steel column 50 to the hole wall 48B of the joint hole 48 of the wooden column 40 (core material 42). Furthermore, a long-term vertical load of the steel frame 30 can be transmitted from the beam 52 to the core member 42 of the wooden pillar 40. Thereby, the force in the vertical direction can be transmitted from the steel column 50 to the wooden column 40 and from the steel frame 30 to the wooden frame 20.

  Further, when an external force or bending moment from the horizontal direction is applied to the steel column 50, the side surface 50B of the steel column 50 supports the hole wall 48B of the joint hole 48 of the wooden column 40 (core member 42), whereby the steel column 50 A horizontal force and bending moment can be transmitted from 50 to the wooden pole 40 and from the steel frame 30 to the wooden frame 20.

  Further, the wooden pole 40 includes a burning stop layer 44 and a burning allowance layer 46. Thereby, when a fire occurs, a flame ignites the burning allowance layer 46, and the burning allowance layer 46 burns. The burned combustion allowance layer 46 is carbonized. As a result, the heat transfer and oxygen supply from the outside of the wooden pole 40 to the core material 42 is cut off by the carbonized burning allowance layer 46 and further the flame stop layer 44 absorbs heat. ) The temperature rise of the core material 42 after the end can be suppressed. Thereby, the fall of the joint strength of the wooden pillar 40 and the steel pillar 50 is suppressed.

[Second Embodiment]
Next, the column junction structure 12 of 2nd Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted suitably. As shown in FIG. 2, the column joint structure 12 of the second embodiment is applied to a joint portion between a lower steel column 80 and an upper wooden column 90. As described above, in the column joint structure of the present invention, either the wooden column or the steel column may be disposed in the upper portion.

(Steel column)
The steel column 80 includes a column base 82 with a lower end embedded in the foundation concrete 74, a main body 84 connected to the upper end of the column base 82 using a flange joint 83, and an outer periphery of the main body 84. And a cylindrical covering portion 86 that covers the surface.

  The column base portion 82 is fixed to the mounting portion 74A by joining the base plate 82A at the lower end to the upper surface of the mounting portion 74A of the basic concrete 74 with an anchor bolt. Thereafter, concrete is placed in a mold (not shown) to embed a base plate 82A, thereby forming a solidified concrete 74B. Thereby, the column base part 82 is rooted in the solidified concrete 74B.

  The covering portion 86 is a cover that covers the outer periphery of the main body portion 84, is placed on the foundation concrete 74, and a working port (not shown) is formed at the lower portion of the covering portion 86, and the bolt of the flange joint 83 is attached to the covering portion 86. Can be tightened or loosened.

(Column junction structure)
A bracket 84B reinforced by a rib 84A is attached to the main body 84 of the steel column 80, and the bracket 84B and the lower end surface 90A of the wooden column 90 are fixed by a lag screw 76 (coach bolt).

  Also, a joining hole 98 is formed in the lower end surface 90A of the wooden pillar 90, and an upper end part (a part above the bracket 84B) 84C of the main body part 84 of the steel pillar 80 is inserted into the joining hole 98 from below. Yes. In addition, a gap is formed between the hole wall 98 </ b> B of the joining hole 98 and the main body portion 84 of the steel column 80, and the filler G is filled in the gap.

  Although not shown in FIG. 2, a beam is connected to the wooden pillar 90, and the wooden pillar 90 constitutes a part of the pillar-beam frame. Further, in this embodiment, no beam is connected to the steel column 80. However, like the wooden column 90, a beam may be connected to form a part of the column beam frame.

(Function and effect)
According to the column joint structure 12 of the second embodiment, a vertical force can be transmitted from the wooden column 90 to the steel column 80.

  In addition, when force is applied to the wooden pillar 90 from the horizontal direction, the hole wall 98B of the wooden pillar 90 supports the main body 84 of the steel column 80, so that the horizontal force and force from the wooden pillar 90 to the steel column 80 are reduced. Bending moment can be transmitted.

  Further, since the base end portion of the wooden pillar 90 is supported by the steel pillar 80 and away from the ground, the corrosion of the wooden pillar 90 can be suppressed. For this reason, durability of the wooden pillar 90 becomes high. Further, when the wooden pillar 90 is aged, a tool or the like is inserted from the work port at the bottom of the covering portion 86, the bolt fixing the flange joint 83 is loosened, and the main body portion 84 is removed from the column base portion 82. It can be replaced with a wooden pole to which a new main body 84 is attached.

[Modification]
Next, a modification of the above embodiment will be described. FIG. 3A shows a cross section of the joint hole 48 of the wooden pillar 40 of the pillar joint structure 10 according to the first embodiment. In the first embodiment, the core member 42 has the upper end surface cut out in a rectangular shape to form the joint hole 48, but the embodiment of the present invention is not limited to this.

  For example, as shown in FIG. 3 (B), the core material 42X may be used as a matching material for the half member 43X, and may be fastened using a through bolt, a nut, and an adhesive. When the core member 42X is configured in this way, the joint hole 48X can be formed by digging a groove in the mating surface of the half member 43X, and therefore, formed by hollowing out the upper end surface of the core member 42X in the longitudinal direction of the core member 42X. There is no need to do. Further, if the flange 56X is welded to the side surface of the steel column 50X, the flange 56X and the half member 43X are fixed with a countersunk screw or the like, and then the half members 43X are joined together, the joint strength between the steel column 50X and the wooden column 40X Can be increased.

  Alternatively, for example, as shown in FIG. 3C, an H-section steel column 50 </ b> Y may be used instead of the CFT steel column 50. When the steel column 50Y is H-shaped steel, a narrow groove is formed on the mating surface of the half member 43Y so that an H-shaped joint hole 48Y is formed when the half members 43Y are joined together. Thereby, since the cross-sectional defect | deletion of the core material 42Y decreases compared with the case where the steel frame column 50 made from CFT is used, the joint strength of the steel column 50Y and the wooden column 40Y can be raised. Further, the half members 43Y may be tightened with lag screws or the like instead of through bolts.

  Alternatively, for example, as shown in FIG. 3D, the outer dimensions of the core material 42Z and the outer dimensions of the H-shaped steel column 50Z are configured to be equal (the width of the core material 42Z and the flange width of the steel column 50Z are Equally, the depth of the core material 42Z and the length from the upper flange upper surface to the lower flange lower surface of the steel column 50Z are made equal), and the flange of the steel column 50Z may be covered with the flame stop layer 44Z. By comprising in this way, the flame stop layer 44Z and the burning allowance layer 46Z which coat | cover the core material 42Z can be extended to the steel column 50Z, and the steel column 50Z can be coat | covered similarly to the core material 42Z. For this reason, since the steel column 50Z is not visually recognized, it is possible to make a mixed structure building look like a wooden structure.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, You may use suitably combining one embodiment and various modifications, and deviates from the summary of this invention. Needless to say, the present invention can be carried out in various modes within a range not to be performed.

DESCRIPTION OF SYMBOLS 10, 12 Column connection structure 40,90 Wood pillar 42 Core material 44 Burning stop layer 46 Burning allowance layer 48, 98 Joint hole 48B, 98B Hole wall 50 Steel column 84 Main-body part (steel column)
G Filler

Claims (3)

A wooden pole with a joint hole formed on the end face;
A steel column having an end inserted into the joint hole;
A filler filled in a gap between the hole wall of the joining hole and the steel column;
With column connection structure. The wooden pillar is
A core material that supports the load;
A dead end layer covering the core material;
A burning allowance layer covering the flame-stopping layer;
The column junction structure according to claim 1, comprising: The steel column is an H-section steel,
The column joint structure according to claim 2, wherein a cross-section of the joint hole is H-shaped and formed in the core member.