JP3415967B2 - Joint structure between column and beam - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between columns and beams, for example, to a joint structure between wooden columns and steel beams suitable for reinforcing a wooden unit building in terms of structural strength.

[0002]

2. Description of the Related Art In general, a wall type construction method is used in which a structural surface material is hammered into each frame of a floor and a wall to form a floor panel and a wall panel, and these floor panels and wall panels are assembled into a three-dimensional structure close to a box shape. Are known. According to this wall type construction method, an external force is evenly supported by the entire column and the entire wall, and high structural strength can be obtained, as compared with the case of the frame construction method consisting of columns and beams. . A unit building method is known as one method for increasing the industrial production rate of a building. When applying the above wall method to a unit building,
A building is divided into a plurality of building units consisting of floor panels with standing wall panels, and a roof unit joined to the top of each building unit. The unit will be transported to the construction site and installed on a pre-prepared foundation.

Here, in the conventional wooden unit building by the wall construction method, when the upper floor building unit constituting the upper floor is installed on the ceiling portion of the lower floor building unit constituting the lower floor, the upper floor building unit is installed. The side edge of the floor panel on which the floor panel is erected directly corresponds to the upper part of the wall panel of the lower floor building unit, and the load of the upper floor building unit and the roof unit corresponds to the lower floor building unit. It can be supported in a dispersed state on each wall panel. By the way, the above-mentioned conventional wooden unit building (JP-A-55-11)
9846 gazette), in the lower-floor building unit, a wall panel corresponding to a side edge portion of at least a wall panel of the floor panel of the upper-floor building unit is provided upright,
Since it is necessary to prepare in principle, the layout structure of the wall panels of the lower floor building unit is complicated by the shape of the upper floor building unit, and the floor plan configuration is difficult, which limits the design flexibility. There was a problem that

Further, when the above-mentioned conventional unit building by the wall construction method is applied to a wooden three-story unit building or a wooden building unit having a long span, the rigidity required for structural strength is as it is. Also, since it was not possible to obtain the proof stress, it was necessary to take reinforcement.

Therefore, in order to solve such a problem, in the unit building described in Japanese Patent Laid-Open No. 60-238546, a wooden reinforcing beam with three side edges of the floor panel of the upper floor building unit is aligned. Strengthened by
By adopting a construction method in which both end portions of one side edge portion strengthened by the wood reinforcing beam of the floor panel are placed on top of the wall panels of the lower floor building unit which face each other, the wood quality of the floor panel is improved. The one side edge strengthened by the reinforcing beam does not have to be directly placed on the upper part of the wall panel of the lower floor building unit.

[0006]

However, in the reinforcing structure in which one side edge portion of the floor panel of the upper floor building unit is reinforced with three wooden reinforcing beams, the above-mentioned problem, that is, the degree of freedom in design, is reduced. Although the problem of being constrained can be solved, it is still insufficient as a solution to the latter problem, that is, as a reinforcing means for a wooden three-story unit building or a wooden building unit with a long span. The latter problem also requires reinforcement to the wall panels.

The present invention has been made in view of the above circumstances, and provides a joint structure between columns and beams that can surely reinforce the structural strength of a wooden three-story unit building or a wooden building unit with a long span. The purpose is to do.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is a joint structure of a wooden column and a steel beam, the steel beam being horizontal from a vertical web and its upper and lower ends. The pair of upper and lower flanges of the steel beam is fitted into the pair of upper and lower slit grooves cut at a predetermined interval in the wood pillar, and integrally formed vertically above the upper flange. While fixing the extended upper reinforcing plate to the side surface of the wood column above the upper slit groove with a fixture, the lower reinforcing plate integrally extended vertically downward from the lower flange is It is characterized in that it is fixed to the side surface of the wooden pillar below the slit groove by a fixing tool.

The invention according to claim 2 is the joint structure between a pillar and a beam according to claim 1, wherein the end of the steel beam is formed of the wooden pillar perpendicular to the inner surface of the end of the web. It is characterized in that a third reinforcing plate fixed by a fixing tool is added to an arbitrary side surface.

Further, the invention according to claim 3 is the same as claim 1.
Alternatively, the joint structure between columns and beams according to 2, wherein the joint structure is used as a means for reinforcing a wooden wall-type structure in which wall panels are erected along side edges of floor panels. It is characterized by being incorporated in a structural building unit.

[0011]

According to the joint structure of the first aspect, a vertical force (a force in a direction indicated by an arrow a in FIG. 6) such as a load applied to the steel beam is horizontally applied to the slit groove of the wooden pillar. It can be countered by the supporting pressure of the upper and lower flanges that are fitted and mounted, and it can also be countered by the anti-shearing force of fasteners such as nails and screws that are driven (screwed) into the wooden pillar from the upper and lower reinforcing plates. it can. On the other hand, of horizontal forces such as wind pressure and earthquakes that act on the steel beam, the force in the length direction of the steel beam (the direction indicated by the arrow b in the figure) is determined by the upper reinforcing plate and the lower reinforcing plate. A direction that can be countered by the anti-shearing force of fasteners such as nails and screws that have been hammered (screwed) into the column, and the steel beam is pressed against the wooden column along the width direction of the steel beam (direction indicated by arrow c in the figure) Can be countered by the supporting pressure of the upper and lower reinforcing plates that are arranged in contact with the side surface of the wooden column, and the steel beam can be pulled out along the width direction of the steel beam (arrow d in the figure). Direction) can be counteracted by the anti-pulling force of fasteners such as nails and screws driven (screwed) into the wooden pillar from the upper and lower reinforcing plates. Therefore, it is possible to obtain high joint strength with respect to both horizontal load and vertical load. The lowering of the bending strength of the wooden column due to the provision of the slit groove is compensated by the upper reinforcing plate and the lower reinforcing plate.

Further, in the joint structure according to the second aspect, in addition to the structure according to the first aspect, the third portion fixed to the end portion of the steel beam to the side surface of the wooden column orthogonal to the inner surface of the web with a fixture. Since a reinforcing plate is added to the steel beam, the horizontal force such as wind pressure or earthquake acting on the steel beam is not affected by the force in the length direction of the steel beam (direction indicated by arrow b in the figure). It can be countered by the anti-shearing force of the fasteners such as nails and screws driven (screwed) from the reinforcing plate and the lower reinforcing plate to the wooden column, and also supports the third reinforcing plate that is placed in contact with the side surface of the wooden column. It is possible to oppose even with pressure, and against the force in the direction of pulling out the steel beam along the width direction of the steel beam (direction indicated by arrow d in the figure), hit (screw) from the upper reinforcing plate and the lower reinforcing plate to the wooden column. It can be countered by the anti-pulling force of fixed tools such as nails and screws that are inserted, and it can also be struck (screwed) from the third reinforcing plate to the wooden pillar It can also be countered by anti-shear or the nails and fixtures such as screws. Therefore, it is possible to obtain much higher joint strength than the joint structure according to the first aspect.

Further, according to the third aspect of the present invention, a wooden building unit manufactured by the wall method is used.
By reinforcing it with the joint structure described above, it is possible to safely and reliably realize the three-story construction and the long span of the wooden unit building by the wall construction method.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a hierarchical structure of a wooden three-story unit building according to an embodiment of the present invention, and FIG. 2 is a structure of a joint portion between columns and beams of the embodiment (A portion in FIG. 1). FIG. 3 is an enlarged perspective view showing an enlarged view of FIG.
5 is a horizontal cross-sectional view taken along line B, FIG. 4 is an exploded perspective view showing an exploded structure (FIG. 2) of the joint portion between the pillars and beams, and FIG.
[Fig. 2] is an enlarged vertical sectional view showing an enlarged portion C of Fig. 1.

First, with reference to FIGS. 1 and 5, a general description will be given of the overall structure of a wooden three-story unit building according to this example. The same wood three-story unit building is installed and fixed on the foundation 1 and constitutes the first floor building unit 2 which constitutes the first floor portion of the building, and the first floor building unit 2 is installed and fixed on the ceiling portion of the building. Second-floor building unit 3 that constitutes the second-floor part
And a third-floor building unit 4 that is installed and fixed to the ceiling of the second-floor building unit 3 and constitutes the third floor of the building, and a roof part of the building that is installed and fixed to the ceiling of the third-floor building unit 4. It consists of a roof unit 5.

In the building units 2, 3 and 4 on each floor, for example, as shown in the figure, three wall panels 7, 7, ... Are arranged along the three side edges of the floor panel 6 as a whole. It mainly consists of a wooden wall-type structure that is erected in a letter shape and stands upright against the wall, and in order to provide the necessary rigidity and strength in terms of structural strength as a unit for three-story construction, the lumber Or wooden pillars such as engineering wood (integrated material) 8,8, ...
The steel beam 9 is incorporated.

The floor panel 6 comprises joists (short joists) 61, 6
.. or end joists (long joists) 62 to form a floor structure by attaching a face material 63 (FIG. 5) such as structural plywood or particle board to the upper surface of the floor frame assembled in a rectangular shape. Each wall panel 7 is sized 40
4 or 406 (JAS) upper frame 71, vertical frames 72, 7
2, ..., and a face material 7 such as a plaster board or a hard wood chip cement plate on both inner and outer surfaces of the wall frame assembled by the lower frame 73.
It is configured as a load bearing wall by attaching 4.

The wooden columns 8, 8, ... Are reinforcing members having a thickness of 100 mm and a width of 100 mm for supporting a vertical load, and are arranged at the four corners of the floor panel 6. Therefore,
Each wall panel 7 is erected along the three side edges of the floor panel 6 and between the wooden columns 8. Further, the steel beam 9 reinforces the bending rigidity, for example,
The floor panel 6 of the upper floor (or the first floor), which is a channel steel having a beam back of 250 mm, a width of 50 mm, and a thickness of 3.2 mm, and is not directly placed on the wall panels 7, 7, ... (or the foundation 1) of the lower floor. It is bridged between the wooden pillars 8 along the side edge portion of the wooden pillar 8. As shown in FIG. 5, a large number of joists 61 forming a floor frame are inserted into the groove of the steel beam 9, and the beam inner floor receiving member 64 fixed to the web 91 of the steel beam 9 by welding. Is placed on the upper surface of.

In addition, the roof unit 5 includes two end truss beams 51, 51 facing each other, and the end truss beams 51, 51.
Girder beam and joint beam 52 installed between 51 and these beams 5
It is composed of a roof plate 53 provided on the upper surfaces of the units 1, 52.

Next, with reference to FIGS. 2 to 4, the structure of the joint between the column and the beam in this example will be described. The web 91 of the steel beam 9 which is the side surface of the lower end portion (corresponding to the height of the floor panel 6) of the corresponding wooden pillar 8 and which is butted.
A pair of upper and lower slit grooves 81, 8 are provided on the outer surface parallel to the surface.
Two are provided. These slit grooves 81, 82
Are separated from each other by the same distance as the distance between the upper and lower flanges 92, 93 of the steel beam 9 (in this example, about 250 mm), and each slit groove 92, 93 has a groove width of each flange of the steel beam 9. Thickness of 92, 93 (in this example, about 3.2 m
m), and the depth is set to be substantially the same as the lateral width (in this example, about 50 mm) of each flange 92, 93 of the steel beam 9. On the other hand, at the end of the steel beam 9,
Upper reinforcing plate 94 extending upward from the upper edge of the web 91
The lower reinforcing plate 95 extending downward from the lower edge of the web 91 and the end face plate 96 closing the end face opening of the steel beam 9 are fixed to each other by welding. Upper reinforcing plate 9
4, a plurality of nail holes 94a, 95a, 96a, ... Are drilled in the lower reinforcing plate 95 and the end face plate 96, respectively.

Therefore, the wooden pillar 8 and the steel frame beam 9 have a pair of slit grooves 81, 82 formed in the wooden pillar 8 in which the upper and lower flanges 92, 93 constituting the steel frame beam 9 are formed, and the web 91 is formed.
The inner surface of is the outer surface of the wooden pillar 8 and is closely fitted until it comes into contact with the portion sandwiched by the pair of upper and lower slit grooves 92, 93. In this state, the upper reinforcing plate 94 is located on the outer surface of the wooden column 8 and above the upper slit groove 81 at the nail holes 94a, 94.
The nails 11, 11, ... Of ZN40 etc. are hammered in and fixed via a ,. The lower reinforcing plate 95 is a wooden pillar 8.
The nails 11, 11, ... Of ZN40 or the like are driven and fixed via the nail holes 95a, 95a ,. Further, the end plate 96 is fixed to the side surface of the wooden pillar 8 facing the steel beam 9 by nailing nails 11, 11, ... Of ZN40 or the like via nail holes 96a, 96a.

The building units 2, 3 and 4 having the above-mentioned structure are produced in a factory, then transported to a construction site, and installed / assembled on a foundation prepared in advance. Each building unit 2, 3,
In order to attach and fix the steel beam 9 to the wooden column 8 when producing 4 in a factory, first, as shown in FIG. 4, the flanges 92 and 93 of the steel beam 9 are tightly fitted in the slit grooves 81 and 82. Mating. At this time, the end surface plate 96 previously welded to the steel beam 9 is brought into contact with the side surface of the wooden column 8 facing the steel beam 9 while the inner surface of the end portion of the web 91 previously welded,
The flanges 92, 93 are fitted into the slit grooves 81, 82 until the upper reinforcing plate 94 and the lower reinforcing plate 95 come into contact with a predetermined portion of the surface of the wooden column 8 on the steel beam 9 side.
Next, the nail holes 94a, 94a, ... Of the upper reinforcing plate 94, the nail holes 95a, 95a, ... Of the lower reinforcing plate 95, and the nail holes 96a, 96a ,. 8, the upper reinforcing plate 94, the lower reinforcing plate 95, and the end face plate 96 are fixed, and the wooden column 8 and the steel beam 9 are joined.

As described above, according to the above construction, the slit grooves 81 of the wooden pillar 8 are not affected by the vertical force (force in the direction indicated by the arrow a in FIG. 6) such as the load acting on the steel beam 9. The flanges 92 and 93 horizontally fitted and mounted on the shaft 82 can counteract each other, and further, the upper reinforcing plate 94 and the lower reinforcing plate 95 can be opposed.
Can also be countered by the anti-shearing force of the nails 11, 11, ... Driven into the wooden pillar 8. On the other hand, of the horizontal forces acting on the steel beam 9 such as wind pressure and earthquake, for the force in the direction of pulling out the steel beam along the length direction of the steel beam 9 (direction indicated by arrow b in the figure) , The upper reinforcing plate 94 and the lower reinforcing plate 95 can oppose each other by the anti-shearing force of the nails 11, 11, ... Driven into the wooden pillar 8, and the bearing pressure of the end face plate 96 arranged to abut the side surface of the wooden pillar 8. But you can compete. Further, with respect to the force in the direction of pressing the steel beam 9 against the wooden pillar 8 along the width direction of the steel beam 9 (the direction indicated by the arrow c in the figure), the upper portion abutting the side surface of the wooden pillar 8 is arranged. With respect to the force in the direction of pulling out the steel beam 9 along the width direction of the steel beam 9 (the direction indicated by the arrow d in the figure), it is possible to oppose by the supporting pressure of the reinforcing plate 94 and the lower reinforcing plate 95,
The nails 11, 11 driven into the wooden pillar 8 from the upper reinforcing plate 94 and the lower reinforcing plate 95 can be countered by the pulling-out force of the nails 11, 11 ... And the nail 11 driven into the wooden pillar 8 from the end face plate 96,
It can also be countered by the anti-shearing force of 11, .... Therefore, it is possible to obtain high joint strength with respect to both horizontal load and vertical load.

Therefore, by reinforcing the wooden building unit by the wall construction method with the joint structure of this embodiment, the wooden unit building by the wall construction method can be safely and reliably made into three stories and a long span. realizable. Further, in the case of having the same bending rigidity, the steel frame beam is less expensive than the wooden beam, which is advantageous in terms of cost.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example, the fixture is not limited to nails, and screws or rivets may be used. Further, the wooden pillars may be penetrated and fastened by using bolts. Also, the number of nails used can be increased or decreased as appropriate.
Further, the steel beam is not limited to the channel steel but may be H-section steel. Further, the upper and lower flanges do not necessarily have to be tightly fitted in the pair of upper and lower slits.

Further, instead of the end face plate 96, as shown in FIG. 7, the end face plate 96 has a substantially same shape and the same function as the end face plate 96 at a position retracted from the end face of the steel beam 9 to the inner side by the width of the wooden pillar 8. You may make it provide the fixed board 96a which has a wood pillar 8 with the end surface board 96 and the fixed board 96a, as shown in FIG.
It may be fixed by nailing in a state of sandwiching. Further, as shown in FIG. 9, both the end plate 96 and the fixed plate 96a may be omitted depending on the situation. Further, the size of the end face plate 96 is not limited to that of the embodiment, and like the end face plate 96b shown in FIG.
It may be extended in the vertical direction and may have a length substantially equal to the distance from the upper end of the upper reinforcing plate 94 to the lower end of the lower reinforcing plate 95.
Further, the web 91 and the wooden pillar 8 may be fixed by nailing or the like.

The building unit is not limited to the U-shaped wall unit in which the wall panels are erected on the three side edges of the floor panel, but the wall panels are erected on the side edges where the floor panels intersect each other. The present invention can also be applied to an L-shaped wall unit or a two-shaped wall unit in which wall panels are erected on opposite side edges of a floor panel. Further, in the above-mentioned embodiment, the joint structure between the lower end portion of the column and the floor beam is described, but the present invention is not limited to this, and can be applied to the joint structure between the upper end portion of the column and the ceiling beam. Further, the present invention is not limited to the wooden three-story unit building, and is suitable for use as a reinforcing means for a wooden two-story unit having a long span, for example.

[0028]

As described above, according to the joint structure of the first aspect of the present invention, with respect to the vertical force such as the loading load acting on the steel beam, it is horizontally fitted and placed in the slit groove of the wooden pole. It can be countered by the bearing pressure of the upper and lower flanges, and further, it can be countered by the anti-shearing force of the fasteners such as nails and screws driven (screwed) into the wooden pillar from the upper reinforcing plate and the lower reinforcing plate. On the other hand, among horizontal forces such as wind pressure and earthquakes that act on the steel beam, the force in the direction of pulling out the steel beam along the length direction of the steel beam is changed from the upper reinforcing plate and the lower reinforcing plate to the wooden pillar. It can be countered by the anti-shearing force of fasteners such as nails and screws that are driven in (screwed), and against the force of pushing the steel beam against the wooden column along the width direction of the steel beam, It can be countered by the bearing pressure of the upper reinforcing plate and the lower reinforcing plate that are placed in contact with each other, and against the force in the direction of pulling out the steel beam along the width direction of the steel beam, the upper reinforcing plate and the lower reinforcing plate are changed This can be countered by the anti-pulling force of fasteners such as nails and screws that are driven in (screwed). Therefore, it is possible to obtain high joint strength with respect to both horizontal load and vertical load. The lowering of the bending strength of the wooden column due to the provision of the slit groove is compensated by the upper reinforcing plate and the lower reinforcing plate.

In addition, in the joint structure according to claim 2, in addition to the structure according to claim 1, the third part fixed to the end of the steel beam to the side surface of the wooden column orthogonal to the inner surface of the web with a fixture. Since the reinforcing plate is added to the upper reinforcing plate, the horizontal reinforcing force applied to the steel beam, such as the wind pressure and earthquake, in the direction of pulling out the steel beam along the length direction of the steel beam Also, it can be countered by the anti-shearing force of the fasteners such as nails and screws that are driven (screwed) into the wooden pillar from the lower reinforcing plate, and also by the supporting pressure of the third reinforcing plate that is placed in contact with the side surface of the wooden pillar. With respect to the force that can oppose and pull out the steel beam along the width direction of the steel beam, the resistance of fixtures such as nails and screws driven (screwed) into the wooden columns from the upper and lower reinforcing plates is In addition to being able to oppose by pulling force, fixtures such as nails and screws that have been hammered (screwed) into the wooden pillar from the third reinforcing plate By anti-shear can counter. Therefore, it is possible to obtain much higher joint strength than the joint structure according to the first aspect.

Further, according to the third aspect of the present invention, a wooden building unit manufactured by the wall method is used.
By reinforcing it with the joint structure described above, it is possible to safely and reliably realize the three-story construction and the long span of the wooden unit building by the wall construction method.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a hierarchical structure of a wooden three-story unit building according to one embodiment of the present invention.

FIG. 2 is a structure of a joint portion between a pillar and a beam of the embodiment (A in FIG. 1).
FIG. 3 is an enlarged perspective view showing an enlarged part).

FIG. 3 is a horizontal sectional view taken along the line BB of FIG.

FIG. 4 is an exploded perspective view showing an exploded structure (FIG. 2) of a joint portion between the pillar and the beam.

5 is an enlarged vertical sectional view showing an enlarged portion C of FIG. 1. FIG.

FIG. 6 is a diagram for explaining a load acting on a beam at a joint between a column and a beam.

FIG. 7 is an enlarged perspective view showing an enlarged structure of a joint portion between a pillar and a beam which is a modified example of the embodiment.

FIG. 8 is an enlarged perspective view showing, in an enlarged manner, a structure of a joint portion between a pillar and a beam which is another modified example of the same embodiment.

FIG. 9 is an enlarged perspective view showing, in an enlarged manner, a structure of a joint portion between a pillar and a beam, which is another modification of the embodiment.

FIG. 10 is an enlarged perspective view showing, in an enlarged manner, a structure of a joint portion between a pillar and a beam, which is another modification of the embodiment.

[Explanation of symbols]

2, 3, 4 building unit 6 floor panels 7 wall panels 8 wooden pillars 81,82 slit groove 9 Steel beam (steel beam) 91 Web 92 Flange (upper flange) 93 Flange (lower flange) 94 Upper reinforcing plate 95 Lower reinforcing plate 96, 96b End face plate (third reinforcing plate) 97 Fixed plate (third reinforcing plate) 11 nails (fixtures)

Claims (3)

(57) [Claims] 1. A joint structure of a wooden pole and a steel beam, wherein the steel beam comprises a vertical web and a pair of flanges projecting horizontally from the upper and lower ends thereof, and cut into the wooden pole at predetermined intervals. The upper and lower flanges of the steel beam are fitted and inserted into a pair of upper and lower slit grooves, and an upper reinforcing plate integrally extending vertically upward from the upper flange is provided with the wood above the upper slit groove. While fixing with a fixture on the side surface of the pillar, a lower reinforcing plate integrally extending vertically downward from the lower flange is fixed with a fixture on the side surface of the wooden pillar below the lower slit groove. This is a joint structure between columns and beams. 2. The end portion of the steel beam is provided with a third reinforcing plate fixed to an arbitrary side surface of the wooden column orthogonal to the inner surface of the web by a fixing tool. The joint structure between columns and beams according to claim 1. 3. The joining structure is incorporated in a building unit having a wall type structure as a means for reinforcing a wooden wall type structure in which wall panels are erected along side edges of a floor panel. The joint structure between a pillar and a beam according to claim 1 or 2, characterized in that.