JP2021161696A - Column-beam joint section - Google Patents

Abstract

To provide a column-beam joint section that prevents deviation of an axis penetrating an open hole of a beam-side joint section and an open hole of a column-side joint section in a fitted state.SOLUTION: A column-beam joint section has an annular joint section 10 whose center line is located on a center line of an open hole at a part where a column-side joint section 3 and beam-side joint section 5 face each other. The annular joint section 10 comprises an annular concave 11 that is formed on either the facing surface of the column-side joint section or the facing surface of the beam-side joint section, which face each other, and an annular convex 12 that is formed on the other facing surface and fitted to the annular concave. Alternatively, the annular joint section comprises annular concaves formed on the facing surface of the column-side joint section and the facing surface of the beam-side joint section, which face each other, and an annular body that is fitted to the annular concave formed on the facing surface of the column-side joint section and the annular concave formed on the facing surface of the beam-side joint section.SELECTED DRAWING: Figure 3

Description

The present invention relates to a beam-column joint in which a column-side joint provided on a column and a beam-side joint provided at the end of a beam are joined.

A column-side joint formed by a T-shaped joint fitting that is joined to the column and is provided so as to protrude from the side surface of the column, and a column-side joint provided at the end of the beam so as to sandwich the column-side joint from both sides in the horizontal direction. A drift pin as a shaft is driven into the through hole formed in the beam side joint and the through hole formed in the column side joint to provide the beam side joint and the beam. A beam-column joint having a structure in which a side joint is joined is known (see Patent Document 1).
Further, a pair of outer plates and a middle plate sandwiched between the pair of outer plates are provided, and a high-strength bolt as a shaft is penetrated through the bolt insertion holes formed in the outer plate and the middle plate to form a high-strength bolt. A joint structure of a steel frame member formed by fastening a nut to a bolt is known. In this configuration, for example, if the middle plate is joined to the steel column and the pair of outer plates are joined to the steel beam, the pair of outer plates and the side surface of the steel column provided at the end of the steel beam are projected. A beam-column joint is formed by joining the middle plate provided in the above with a high-strength bolt as a shaft (see Patent Document 2).
When an external force acts on these column-beam joints during an earthquake or the like, relative rotation between the column-side joints and the beam-side joints is allowed, and during the rotation, the column-side joints and the beam-side joints Energy is absorbed by the frictional resistance between them.

Japanese Unexamined Patent Publication No. 2006-16807 Japanese Unexamined Patent Publication No. 2000-45559

However, in the beam-column joints disclosed in Patent Document 1 and Patent Document 2, when an external force acts on the beam-column joint at the time of an earthquake or the like, axial deviation is likely to occur, and when the axial deviation occurs, There is a problem that the bearing stress applied from the shaft to the through hole becomes large and the beam-column joint is easily damaged. Further, when the axis deviation occurs, there is a problem that the rotational operation is not stable and the energy absorption operation due to the resistance between the column side joint portion and the beam side joint portion is not stably performed.
In order to solve the above-mentioned problems, the present invention provides a column-beam joint portion capable of suppressing an axial deviation of a shaft penetrated in a fitted state between a through hole of a beam-side joint portion and a through hole of a column-side joint portion. It is a thing.

The beam-column joint according to the present invention is installed so as to sandwich the beam-side joint portion provided at the end of the beam and the column-side joint portion provided so as to project from the outer peripheral surface of the column from both sides in the horizontal direction. The beam side joint is provided, and the column and the beam are joined by the shaft being penetrated into the through hole formed in the beam side joint and the through hole formed in the column side joint in a fitted state. The beam-side joint is provided with an annular joint whose center line is located on the center line of the through hole at the portion where the beam-side joint and the beam-side joint face each other. Is formed on one of the facing surfaces of the column-side joints and the beam-side joints facing each other, and is formed on the other facing surface and fitted into the annular recess. An annular recess formed on each of the facing surfaces of the column-side joints and the facing surfaces of the beam-side joints, which are configured to include the combined annular protrusions, and the pillar-side joints. The beam is characterized in that it is configured to include an annular recess formed on the facing surface of the beam and an annular body fitted to the annular recess formed on the facing surface of the beam-side joint. When an external force acts on the joint at the time of an earthquake or the like, the function of the annular joint can provide a beam-beam joint in which the axial deviation of the shaft is suppressed.
Further, since the annular concave portion and the annular convex portion that fit each other, or the annular concave portion and the annular body that fit each other are formed of metal, the strength of the annular joint portion is improved, and the shaft It becomes possible to effectively suppress the misalignment.
Further, since the rotation resistance means for resisting the rotation centered on the axis of the column side joint and the beam side joint is provided, the axis deviation is suppressed and the energy absorption operation is stably performed. A joint can be provided.
Further, since the rotation resistance means is a means for increasing the frictional resistance between the facing surface of the column-side joint and the facing surface of the beam-side joint, the facing surface of the column-side joint and the facing surface of the beam-side joint It is possible to provide a beam-column joint capable of increasing the amount of energy absorbed by frictional resistance.
Further, since the rotation resistance means is an elastic means provided between the facing surface of the column-side joint and the facing surface of the beam-side joint, the amount of energy absorbed can be increased by the elastic resistance of the elastic means. At the same time, it is possible to provide a beam-column joint in which the energy absorption operation is stably performed.

An exploded perspective view (Embodiment 1) of an exploded view of the structure of a beam-column joint. FIG. 3 is a perspective view showing a beam-column joint (Embodiment 1). The plan view which shows the column-beam joint part (the first embodiment). FIG. 3 is a perspective view showing a concave steel plate and a convex steel plate (Embodiment 1). A side view (Embodiment 1) showing a concave steel plate and a convex steel plate. FIG. 5 is a cross-sectional view showing a concave steel plate at a beam-side joint and a convex steel plate at a column-side joint (Embodiment 1). FIG. 5 is a cross-sectional view showing a state in which a concave steel plate at a beam-side joint and a convex steel plate at a column-side joint are joined to form an annular joint (Embodiment 1). Explanatory drawing which shows the joining method of the beam side joint part and the column side joint part (the first embodiment). Explanatory drawing which shows the joining method of the beam side joint part and the column side joint part (the first embodiment). An exploded perspective view (Embodiment 2) of an exploded view of the structure of a beam-column joint. FIG. 2 is a perspective view showing a concave steel plate and a torus (Embodiment 2). FIG. 2 is a side view showing a concave steel plate and a torus (Embodiment 2). FIG. 2 is a cross-sectional view showing a ring body and a concave steel plate of a beam-side joint and a column-side joint (Embodiment 2). FIG. 2 is a cross-sectional view showing a state in which an annular body and a concave steel plate of a beam-side joint and a column-side joint are joined to form an annular joint (Embodiment 2). FIG. 6 is a cross-sectional view showing a column-beam joint having a configuration in which a disc spring is provided between a beam-side joint and a column-side joint (Embodiment 4). FIG. 6 is a cross-sectional view showing a column-beam joint having a configuration in which a coil spring is provided between a beam-side joint and a column-side joint (Embodiment 4).

Embodiment 1
As shown in FIGS. 1 to 3, the beam-column joints according to the first embodiment are provided at the end of the beam 4 and the column-side joint 3 provided so as to project from the outer peripheral surface 2 of the column 1. A beam-side joint 5 is provided so as to sandwich the column-side joint 3 from both sides in the horizontal direction, and a through hole 6 formed in the beam-side joint 5 and a penetration formed in the column-side joint 3 are provided. It is a beam-column joint where the column 1 and the beam 4 are joined by the shaft 8 being penetrated through the hole 7 in a fitted state, and the column-side joint 3 and the beam-side joint 5 face each other. A beam-column joint A (see FIG. 2) having an annular joint 10 whose center line 10C is located on the center lines 6C and 7C of the through holes 6 and 7.

For example, the column 1 is a steel column made of shaped steel such as H-shaped steel or a steel pipe, and the beam 4 is a wooden beam.

The wooden beams constituting the beam 4 are formed of, for example, CLT (Cross Laminated Timber) or laminated lumber or LVL (Laminated Veneer Lumber) or plywood or lumber.
In addition, CLT is a "ground board or small square timber (these are long with their fiber directions almost parallel to each other)" as stipulated in Article 1 of the Japanese Agricultural Standard for Orthogonal Laminated Wood of Ministry of Agriculture, Forestry and Fisheries Notification No. 3079. (Including those adjusted by joining and adhering in the longitudinal direction) are arranged or bonded in the width direction with the fiber directions substantially parallel to each other, and laminated and bonded mainly with the fiber directions approximately perpendicular to each other to form three or more layers. It is a general material with the structure of.
That is, CLT is wood formed by laminating a plurality of boards so that the fiber directions of the boards to be laminated are orthogonal to each other, and is called an orthogonal laminated board.
Glulam is wood composed of a plurality of boards laminated so that the fiber directions of the boards to be laminated are parallel to each other.
In addition, LVL is defined in Article 1 of the Japanese Agricultural and Forestry Standards for veneer laminated lumber of Ministry of Agriculture, Forestry and Fisheries Notification No. 2773. When a general lumber and a veneer whose fiber directions are orthogonal to each other are used, the total thickness of the orthogonal veneers is less than 30% of the thickness of the product, and the veneers are laminated and bonded to each other. It is a general material in which the composition ratio of the number of veneers is 30% or less.

As shown in FIGS. 1 and 8, the column-side joints 3 are provided on both the flat steel plates 31 for joining and the flat steel plates 32 and 32 for joining that protrude from the outer peripheral surface 2 of the pillar 1. For example, it is composed of convex steel plates 14 and 14, which will be described later.

When the column 1 is a column 1 having a rectangular cross section, the outer peripheral surface 2 of the column 1 is one side surface of the column 1, and the end surface side of the flat steel plate 31 for joining is connected to one side surface of the column 1.
The flat steel plate 31 for joining is composed of, for example, a T-shaped vertical plate of a gusset plate having a T-shaped cross section. That is, the T-shaped horizontal plate of the gusset plate is connected to one side surface of the pillar 1 by welding or bolts, and the flat steel plate 31 for joining is composed of the T-shaped vertical plate of the gusset plate protruding from one side surface of the pillar 1. Will be done.

As shown in FIG. 1, the beam-side joint 5 has, for example, a configuration provided at the end of the beam 4, and is open to the end surface 4a of the beam 4, the upper surface 4b of the beam 4, and the lower surface 4c of the beam 4. The groove 51 into which the beam-side joint portion 3 is inserted, the pair of sandwiching portions 52, 52 remaining on both sides of the groove 51 in the horizontal direction, and the sandwiching portions 52, 52 are parallel to each other as shown in FIG. For example, recessed steel plates 13 and 13, which will be described later, are provided on the opposing planes 53 and 53, respectively.
The groove 51 of the beam-side joint 5 is a groove having a rectangular cross section having a constant width extending in the vertical direction at the end of the beam 4.

The annular joint 10 is formed on the annular recess 11 formed on one of the facing surfaces of the column-side joints 3 and the beam-side joints 5 facing each other, and on the other facing surface. It is configured to include an annular convex portion 12 that has been fitted into the annular recess 11.
That is, the annular joint portion 10 is a joint portion in which the annular concave portion 11 and the annular convex portion 12 are fitted.

The annular recess 11 is provided, for example, on one plate surface 13a of a flat steel plate. Hereinafter, a steel plate in which the annular recess 11 is provided on one of the plate surfaces 13a is referred to as a recessed steel plate 13.
The annular convex portion 12 is provided on, for example, one plate surface 14a of a flat steel plate. Hereinafter, a steel plate in which the annular convex portion 12 is provided on one of the plate surfaces 14a is referred to as a convex steel plate 14.

That is, in the first embodiment, the annular recess 11 provided on one plate surface 13a of the concave steel plate 13 which is the facing surface of the beam side joint 5 and the convex steel plate 14 which is the facing surface of the column side joint 3. The annular joint portion 10 was formed by the annular convex portion 12 provided on one of the plate surfaces 14a and fitted into the annular concave portion 11.

As shown in FIG. 8, the through hole 6 formed in the beam-side joint portion 5 is formed in the through hole 61 formed in the sandwiching portion 52 and the concave steel plate 13 attached to the facing plane 53 of the sandwiching portion 52. It is composed of a through hole 15.
As shown in FIG. 8, the through holes 7 formed in the column-side joint portion 3 are attached to the through holes 71 formed in the flat steel plate 31 for joining and the flat plate surfaces 32 and 32 of the flat steel plate 31 for joining. It is composed of through holes 16 and 16 formed in the convex steel plates 14 and 14.

When the shaft 8 penetrates the through holes 6 and 7, no screw is formed on the peripheral surface to be fitted with the through holes 6 and 7, and the shaft 8 penetrates the through holes 6 and 7 and protrudes from the through holes 6 and 7. Double-screw bolts 81 with screws formed only on both ends, or through holes 6 and 7 through the through holes 6 and 7 without threads formed on the peripheral surface to be fitted with the through holes 6 and 7. It is composed of a single-threaded bolt in which a screw is formed only on the more protruding tip side, a drift pin, or the like.

Next, a method of forming the column-beam joint A according to the first embodiment will be described.
First, a concave steel plate 13 having an annular recess 11 provided on one plate surface 13a and a convex steel plate 14 having an annular convex portion 12 provided on one plate surface 14a are manufactured (FIGS. 1 and 4). , See Fig. 5).
The annular recess 11 of the concave steel plate 13 is formed on one plate surface 13a of the flat steel plate in which the through hole 15 is formed, using, for example, a cutting machine (not shown) to form an annular recess centered on the center of the through hole 15. It is formed by cutting 11.
The annular convex portion 12 of the convex steel plate 14 is a circle on one plate surface 14a of a flat steel plate in which a through hole 16 corresponding to the through hole 71 is formed, for example, so that the center coincides with the center of the through hole 16. The ring is attached and formed.

Then, as shown in FIGS. 6 and 8 (a), the convex steel plate 14 is attached to both the flat plate surfaces 32 and 32 of the joining flat steel plate 31, respectively. That is, the convex steel plate 14 is attached to the flat plate surface 32 by using an attachment means (not shown) in a state where the other plate surface of the convex steel plate 14 and the flat plate surface 32 are in contact with each other. As described above, as shown in FIG. 8, the convex steel plates 14 and 14 are provided on both the flat plate surfaces 32 and 32 of the joining flat steel plate 31, and the through holes 71 and the convex steel plates formed in the joining flat steel plate 31 are provided. A pillar-side joint portion 3 having a through hole 7 formed so that the through holes 16 and 16 formed in the 14 and 14 are continuous with the same diameter is configured.

Further, the recessed steel plate 13 is attached to each of the opposing planes 53 and 53 of the pair of sandwiching portions 52 and 52, which are portions located on both sides of the groove 51 in the horizontal direction (see FIG. 8A). That is, the concave steel plate 13 is attached to the opposed plane 53 by using an attachment means (not shown) in a state where the other plate surface of the concave steel plate 13 and the facing plane 53 are in contact with each other. As described above, the concave steel plates 13 and 13 are provided on the opposing planes 53 and 53 of the sandwiching portions 52 and 52, and the through holes 61 and 61 formed in the sandwiching portions 52 and 52 and the through holes formed in the concave steel plates 13 and 13 are provided. A beam-side joint 5 having through holes 6 configured so that the holes 15 and 15 have the same diameter and are continuous is configured (see FIG. 8A).

The mounting means (not shown) for mounting the convex steel plate 14 on the flat plate surface 32 or the concave steel plate 13 on the facing flat surface 53 is a screw, an adhesive, or a combination of a screw and an adhesive. The mounting means may be used.

Then, the beam side joint 5 is installed so that the column side joint 3 is inserted into the groove 51 of the beam side joint 5.
That is, as shown in FIG. 7, the beam-side joint 5 is installed so as to sandwich the column-side joint 3 from both sides in the horizontal direction, and the annular recess 11 of the concave steel plate 13 of the beam-side joint 5 and the column-side joint are joined. The annular joint 10 is formed by fitting the convex steel plate 14 of the portion 3 with the annular convex portion 12.
After that, as shown in FIGS. 3 and 2, the beam-column joint A is formed by penetrating the shaft 8 through the through holes 6 and 7.
The side surface side of the beam 4 in the through holes 61, 61 is formed in the counterbore hole 83 for accommodating the nut 82, and the bolt 81 penetrates the through holes 61, 61 and the counterbore hole 83, It is preferable to use double-threaded bolts in which threads are formed only on both ends protruding from the 83.
In this case, the shafts of the double-threaded bolts 81 are passed through the through holes 6 and 7, and the nuts 82 and 82 are fastened to the threaded portions on both ends that pass through the through holes 6 and 7 and protrude into the counterbore 83. By doing so, the column-side joint portion 3 and the beam-side joint portion 5 are joined so that one plate surface 13a of the annular recess 11 and one plate surface 14a of the convex steel plate 14 are in contact with each other in a crimped state. The column-beam joint A is configured.

When the height dimension of the annular convex portion 12 (the protruding length of the annular convex portion 12) is small, the column side joint portion 3 becomes the beam side joint portion 5 by bending the sandwiching portions 52 and 52. It is inserted into the groove 51 of the.
On the other hand, when the height dimension of the annular convex portion 12 (the protruding length of the annular convex portion 12) is large, the column-side joint portion 3 may not be inserted into the groove 51 of the beam-side joint portion 5.
In this case, as shown in FIG. 8A, the beam 4 is cut at the center position in the beam width direction (center position in the width direction of the groove 51) along the material axis direction of the beam 4 and 2 The divided split beams 4A and 4A are manufactured.
Further, the concave steel plates 13 are attached to the facing planes 53 and 53 of the sandwiching portions 52 and 52 of the divided beams 4A and 4A, respectively, to manufacture the beam side joint portions 5A and 5A.
Then, as shown in FIG. 8B, both the annular protrusions 12 and 12 of the column-side joint 3 and the annular recesses of the beam-side joints 5A and 5A are formed from both sides of the column-side joint 3 in the horizontal direction. The ring joint portion 10 in which 11 and 11 are fitted is formed. After that, the shaft 8 is passed through the through holes 6 and 7 to join the beam-side joints 5A and 5A to both sides of the column-side joint 3 in the horizontal direction, and one plate surface 13a of the annular recess 11 and the convex steel plate 14 are joined. The split is made by bringing one plate surface 14a into contact with the crimped state, and passing the bolt 42 through the through holes 41, 41 formed so as to penetrate the split beams 4A, 4A and fastening the nut 43. Join the beams 4A and 4A.
As described above, the beam-side joint portion 5 and the column-side joint portion 3 of the beam 4 to which the divided beams 4A and 4A are joined can be joined via the annular joint portion 10 to form the column-beam joint portion A.
The side surface side of the beam 4 in the through holes 41 and 41 is formed in the counterbore 45 for accommodating the nut 43, and the bolt 42 penetrates the through holes 41 and 41 and the counterbore 45, It is preferable to use double-threaded bolts in which threads are formed only on both ends protruding from 45.
Further, the appearance of the wooden beam 4 can be improved by closing the openings of the counterbore holes 45 and 83 with a wooden lid or the like.

Further, when there is a possibility that the column-side joint 3 cannot be inserted into the groove 51 of the beam-side joint 5, the column-beam joint A may be formed as shown in FIG.
That is, as shown in FIG. 9A, the concave steel plates 13 are formed on the annular convex portions 12 and 12 of both the convex steel plates 14 and 14 of the column side joints 3 from both sides in the horizontal direction of the column side joints 3, respectively. , 13 to form the column side joint 3A temporarily installed in the state where the annular recesses 11 and 11 are fitted.
Next, an adhesive is previously applied to the other surfaces of the concave steel plates 13 and 13 on both sides of the column-side joint 3A, or the opposing planes 53 and 53 of the sandwiching portions 52 and 52 on the beam end side. As shown in FIG. 9B, the column-side joint 3A enters the groove 51 on the beam end side, and the concave steel plates on both sides of the opposing planes 53 and 53 of the sandwiching portions 52 and 52 and the column-side joint 3A. Assemble so that the other surfaces of 13 and 13 are in contact with each other and adhered to each other.
Then, as shown in FIG. 9B, by passing the double-threaded bolt 81 (shaft 8) through the through holes 6 and 7, the beam-side joint portion 5 and the column-side joint portion 3 are brought into contact with the annular joint portion 10. The column-beam joint portion A joined via the above can be formed.
In the case of the forming method, the facing planes 53 and 53 and the other surfaces of the concave steel plates 13 and 13 on both sides of the column-side joint 3A are sandwiched together with or instead of the adhesive. A screw such as a screw may be screwed in from the outer surface side of the portion 52 to connect the sandwiching portion 52 and the concave steel plate 13.

According to the first embodiment, the beam-side joint portion 5 and the column-side joint portion 3 are joined via the annular joint portion 10 to form the column-beam joint portion A. When an external force is applied, the function of the annular joint 10 suppresses the axial deviation of the shaft 8, so that it is possible to provide the beam-column joint A that is less likely to be damaged due to the axial deviation.
In particular, since the annular recess 11 and the annular convex portion 12 that are fitted to each other are formed of steel materials (recessed steel plate 13 and convex steel plate 14), the strength of the annular joint 10 is improved, and the shaft 8 It becomes possible to effectively suppress the misalignment.
Further, due to the function of the annular joint portion 10, the rotational operation at the column-beam joint portion A is stably performed, so that the contact surface between the column-side joint portion 3 and the beam-side joint portion 5 that are in contact with each other ( That is, it is possible to provide the beam-column joint A in which the energy absorption operation due to the frictional resistance between one plate surface 14a of the convex steel plate 14 and one plate surface 13a) of the concave steel plate 13 is stably performed.

In the first embodiment, the column side joints 3 may be provided with concave steel plates 13 and 13, and the beam side joints 5 may be provided with convex steel plates 14 and 14.

Embodiment 2
As shown in FIGS. 10 to 14, the annular joints 11 and 11 are formed on the facing surfaces of the column-side joints 3X and the beam-side joints 5X, respectively, which face each other. An annular joint including an annular recess 11 formed on the facing surface of the column-side joint 3X and an annular recess 11 formed on the facing surface of the beam-side joint 5X. It may be a column-beam joint formed by the portion 10X.
For example, the annular recesses 11 and 11 facing each other formed on the facing surfaces of the column-side joints 3X facing each other and the facing surfaces of the beam-side joints 5X are made of steel and facing each other of the column-side joints 3X. The annular body 17 fitted to the annular recess 11 formed on the surface and the annular recess 11 formed on the facing surface of the beam-side joint 5X was formed of a steel material.
Specifically, the column-side joint portion 3X is, for example, a concave steel plate 13 provided on both the flat steel plate 31 for joining and the flat plate surfaces 32, 32 of the flat steel plate 31 for joining, which protrude from the outer peripheral surface 2 of the column 1. , 13 and.
Further, the beam-side joint portion 5X is composed of a groove 51, sandwiching portions 52, 52, and recessed steel plates 13 and 13 provided on facing planes 53 and 53 of the sandwiching portions 52 and 52 facing each other in parallel. Will be done.
Since the configuration other than the annular joint portion 10X is the same as that of the first embodiment, the same parts as those of FIGS. 1, 4 to 7 of the first embodiment are designated by the same reference numerals in FIGS. 10 to 14. The explanation is omitted.

In the case of the configuration of the second embodiment, the beam-column joint can be assembled by the method described in FIG. 8, for example.
In the case of the configuration of the second embodiment, the annular bodies 17 and 17 are fixed to the annular recesses 11 and 11 of the concave steel plates 13 and 13 of the column side joint 3A, or the concave steel plate of the beam side joint 5A. If the annular bodies 17 and 17 are fixed to the annular recesses 11 and 11 of 13 and 13, the configuration is the same as that of the first embodiment. In this case, the beam-column joint can be assembled by the method described with reference to FIG.

Even with the beam-column joint of the second embodiment, the same effect as that of the beam-column joint A of the first embodiment can be obtained.

Embodiment 3
In the column-beam joints of the first and second embodiments, a rotation resistance means for resisting rotation about the axis 8 of the column-side joint and the beam-side joint is provided.
As the rotation resistance means, a means for increasing the frictional resistance between the facing surface of the column-side joint and the facing surface of the beam-side joint may be provided.
For example, by forming at least one of the one plate surface 13a of the concave steel plate 13 and the one plate surface 14a of the convex steel plate 14 in contact with each other as a roughened surface, the columns are formed in the event of an earthquake or the like. When a force is applied to the end joint and the column-side joint and the beam-side joint rotate with each other, one plate surface 13a of the annular recess 11 and one plate surface 14a of the convex steel plate 14 Friction resistance can be increased and energy absorption can be increased.
Therefore, according to the third embodiment, the axial deviation can be suppressed, and the amount of energy absorbed due to the frictional resistance between the facing surface of the column-side joint and the facing surface of the beam-side joint can be increased. Can be provided.

Embodiment 4
In the column-beam joints of the first and second embodiments, the facing surface of the column-side joint and the beam-side joint are provided as rotation resistance means for resisting rotation around the axis 8 of the column-side joint and the beam-side joint. An elastic means may be provided between the two surfaces.
For example, as shown in FIG. 15, a disc spring 18 is provided as an elastic means between the facing surface of the column-side joint and the facing surface of the beam-side joint, or as shown in FIG. 16, the column-side joint is provided. A coil spring 19 is provided as an elastic means between the facing surface of the portion and the facing surface of the beam-side joint portion.

In FIG. 15, the protruding length of the annular convex portion 12 protruding from one plate surface 14a of the convex steel plate 14 in the first embodiment is the annular concave portion formed on one plate surface 13a of the concave steel plate 13. The annular joint portion 10Y was formed so as to be longer than the depth of 11, and only the portion 12t on the protruding tip side of the annular convex portion 12 was fitted into the annular concave portion 11. Then, an installation space 34 for the disc spring 18 is provided between one plate surface 13a of the concave steel plate 13 and one plate surface 14a of the convex steel plate 14, and the disc spring 18 is placed in the installation space 34 of the disc spring 18. The configuration in which the double-threaded bolt 81 (shaft 8) was passed through the central through hole of the disc spring 18 was illustrated.

Further, in FIG. 16, the width dimension in the direction along the central axis of the annular body 17 in the second embodiment is longer than the depth of the annular recess 11 formed on one plate surface 13a of the concave steel plate 13. The portion 17a on one end side in the width direction of the torus 17 is fitted into the annular recess 11 of the one recessed steel plate 13, and the portion 17b on the other end side in the width direction of the torus 17 is fitted in the other recess. An annular joint portion 10Z fitted in the annular recess 11 of the steel plate 13 was constructed. Then, the coil spring 19 is installed in the installation space 35 between one plate surface 13a of the one concave steel plate 13 facing each other and one plate surface 13a of the other concave steel plate 13, and the coil hollow of the coil spring 19 is formed. An example is shown in which a double-threaded bolt 81 (shaft 8) is passed through the portion.
One end 19a of the coil spring 19 is fixed to one end fixing portion formed on one plate surface 13a of one concave steel plate 13, and the other end 19b of the coil spring 19 is one of the other concave steel plates 13. It was fixed to the other end fixing portion formed on the plate surface 13a.

According to the fourth embodiment, as the rotation resistance means, the elastic means is provided between the facing surface of the column-side joint and the facing surface of the beam-side joint, so that the axial deviation is suppressed and the axial deviation is suppressed. The elastic resistance of the elastic means can increase the amount of energy absorption and provide a beam-column joint in which the energy absorption operation is stably performed.
As shown in FIG. 15, according to the configuration in which the disc spring 18 is provided, the frictional resistance between one plate surface 13a of the concave steel plate 13 and one plate surface 14a of the convex steel plate 14 and the disc spring 18 can be increased. At the same time, when a force is applied to the column end joint in the event of an earthquake or the like and the column side joint and the beam side joint rotate with each other, the energy absorption amount can be increased.
As shown in FIG. 16, according to the configuration in which the coil spring 19 is provided, the elastic resistance of the coil spring 19 causes the rotational resistance when one concave steel plate 13 and the other concave steel plate 13 try to rotate relatively. In addition to being able to increase the amount of energy absorbed, it is possible to increase the amount of energy absorbed because a force is applied to the column end joint in the event of an earthquake and the column side joint and the beam side joint operate stably when they rotate with each other. can.

In FIG. 15, a coil spring 19 may be used instead of the disc spring 18. Further, in FIG. 16, a disc spring 18 may be used instead of the coil spring 19.

Instead of the disc spring 18 and the coil spring 19 described in the fourth embodiment, a rubber plate is provided, and the rubber plate is formed on one plate surface 13a of the concave steel plate 13 facing each other and the convex steel plate 14 shown in FIG. It may be fixed to one plate surface 14a, or the rubber plate may be fixed to one plate surface 13a, 13a of the concave steel plates 13, 13 facing each other shown in FIG.

In each embodiment, the concave steel plate 13 and the convex steel plate 14 are used, but one of the annular concave portion 11 and the annular convex portion 12 is directly formed on the flat plate surface 32 of the flat steel plate 31 for joining, and the sandwiching portion 52 A circle formed by directly forming the other of the annular concave portion 11 and the annular convex portion 12 on the facing plane 53 and forming the annular concave portion 11 formed on the flat plate surface 32 of the flat steel plate 31 for joining and the opposing plane 53 of the sandwiching portion 52. An annular joint portion in which the ring convex portion 12 is fitted is formed, or a circle formed on the facing plane 53 of the annular convex portion 12 and the sandwiching portion 52 formed on the flat plate surface 32 of the flat steel plate 31 for joining. An annular joint portion in which the ring recess 11 is fitted may be formed.

Further, the beam and the beam side joint, the column and the column side joint may be all made of wood.

1 column, 2 outer peripheral surface of column, 3 column side joint, 4 beam, 5 beam side joint,
6,7 through holes, 8 axes, 10 ring joints, 11 ring recesses, 12 ring protrusions,
18 Belleville spring (elastic means), 19 Coil spring (elastic means).

Claims (5)

A column-side joint provided so as to protrude from the outer peripheral surface of the column,
It is provided with a beam-side joint provided at the end of the beam and installed so as to sandwich the column-side joint from both sides in the horizontal direction.
A column-beam joint in which a column and a beam are joined by a shaft penetrating into a through hole formed in a beam-side joint and a through-hole formed in a column-side joint in a fitted state.
An annular joint whose center line is located on the center line of the through hole is provided at a portion where the column-side joint and the beam-side joint face each other.
The annulus joint is
An annular recess formed on one of the facing surfaces of the column-side joints and the facing surfaces of the beam-side joints facing each other, and an annular recess formed on the other facing surface and fitted into the annular recess. Was it constructed with a convex part of the annulus?
or,
The annular recesses formed on the facing surfaces of the column-side joints and the facing surfaces of the beam-side joints facing each other, and the annular recesses formed on the facing surfaces of the column-side joints and the beam-side joints facing each other. A column-beam joint characterized in that it is configured to include an annular recess formed on a surface and an annular body fitted to the annular recess. The column-beam joint according to claim 1, wherein the annular concave portion and the annular convex portion that are fitted to each other, or the annular concave portion and the annular body that are fitted to each other are formed of metal. The column-beam joint according to claim 1 or 2, wherein a rotation resistance means for resisting rotation about the axis of the column-side joint and the beam-side joint is provided. The beam-column joint according to claim 3, wherein the rotation resistance means is a means for increasing the frictional resistance between the facing surface of the column-side joint and the facing surface of the beam-side joint. The beam-column joint according to claim 3, wherein the rotation resistance means is an elastic means provided between the facing surface of the column-side joint and the facing surface of the beam-side joint.

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