JP2020105892A - Column beam joint structure - Google Patents

Abstract

To provide a column beam joint structure with a beam constituting a structure plane and a column constituting an additional vibration control body, having an in-plane rigidity and an out of-plane rigidity without being subject of a load from the beam of the structure plane.SOLUTION: In a column beam joint structure 30 constituted by joining an additional vibration control column 3 constituting an additional vibration control body 20 to a structure plane 10 of the architectural structure formed with a steel beam 1 and a steel column 2, a first joint metal 40 is mounted to the steel beam 1, a second joint metal 50 is mounted to the additional vibration control column 3, in the first joint metal 40, inclined two steel plates 42 are jointed to a baseplate 41, in the second joint metal 50, inclined two steel plates 52 are jointed to a baseplate 51, the steel plates 42, 52 are in surface contact each other, a first hole 42a and a second hole 52a are arranged in corresponding positions of both steel plates 42, 52, at least one is a long hole extending in a longitudinal direction of the additional vibration control column 3 and a bolt 61 is inserted and jointed by the bolt.SELECTED DRAWING: Figure 1

Description

The present invention relates to a beam-column joint structure.

The damping panel attached to the building surface may be a structural member or a non-structural member. When the vibration damping panel is a structural member, the building is designed with the vibration damping panel being incorporated as a structural member in the frame of the building. Therefore, the vibration control panel, which is a structural member, bears a vertical load such as a load and the weight of the building.

On the other hand, when the damping panel is a non-structural member, it is desirable that the damping panel is a member that does not bear the vertical load of the building. Although it is related to not bearing this vertical load, it must be able to absorb the bending of the beam that forms the construction surface of the building, in other words, to have a structure that does not receive the load from the beam due to the effect of the bending of the beam. It costs. Therefore, the vibration control panel is a non-structural member that does not affect the structural frame in this way, as "additional vibration control (body)", for example, by the Japan Building Center (BCJ: The Building Center of Japan). In order to obtain a performance evaluation (rating), it is necessary to satisfy the above two conditions.

Here, in the frame structure of the upper beam, the lower beam, and the two columns, between the two vertical members placed between the upper beam and the lower beam, and between the two vertical members. A seismic wall is proposed in which a damping means having a fixed damping material is arranged. In the vibration damping means, the upper ends of the two vertical members are joined to the upper beam, and the lower ends of the two vertical members are in the construction plane with respect to the lower beam by using a column base member, a restraining member, and a bolt. Are joined so as to allow the movement in the vertical direction, and are joined so as to restrain the movement in the horizontal direction (see, for example, Patent Document 1).

Japanese Patent No. 5483525

In the earthquake-resistant wall described in Patent Document 1, the restraint member fixed to the foundation has a long hole, the column base member has a round hole, and bolts are inserted into the long hole and the round hole to tighten the nut. As a result, the vertical members that make up the earthquake-resistant wall can move vertically with respect to the foundation, forming a structure that does not receive the load from the beams on the structural surface. By the way, in this earthquake-resistant wall, the column base member is constituted by a plate, the restraint member is constituted by two plates, and the plate constituting the column base member is sandwiched between the two plates constituting the restraint member. The column base member and the restraint member are arranged such that the wide surface of each plate extends in the width direction of the structure surface or the earthquake-resistant wall.

Therefore, when the horizontal force at the time of earthquake acts in the in-plane direction of the earthquake-resistant wall and the earthquake-resistant wall is deformed into, for example, a parallelogram shape, the bolt inserted into the round hole of the column base member along the elongated hole of the restraint member. Sliding in the direction in which the seismic wall is deformed reduces the in-plane rigidity and may reduce the in-plane damping effect. Therefore, if you try to suppress the decrease in in-plane rigidity by increasing the tightening force of the bolt or applying friction bonding to make it difficult to slide the bolt, this time, the vertical member that constitutes the earthquake resistant wall is against the foundation. It becomes difficult to move in the vertical direction, and the structure receives the load from the beams on the construction surface.

Therefore, without increasing the fastening force of the bolts, by extending the wide surface of each plate that constitutes the column base member and the restraint member in the direction orthogonal to the width direction of the construction surface or the earthquake resistant wall When the wall receives horizontal force in the in-plane direction and is deformed into a parallelogram shape, the bolt is prevented from sliding in the deformed direction of the seismic wall within the construction plane, and the decrease in in-plane rigidity can be suppressed. it can. Further, vertical movement of the vertical members constituting the seismic wall can be permitted with respect to the foundation, and a structure can be formed in which no load is applied from the beams on the structural surface. However, since the wide surface of each plate that constitutes the column base member and the restraint member extends in the direction orthogonal to the width direction of the structure surface and the earthquake-resistant wall, the pillar is now along the long hole of the restraint member. The bolts inserted into the round holes of the leg members are likely to slide in the out-of-plane direction of the structure surface, and this out-of-plane sliding may reduce the out-of-plane rigidity of the earthquake-resistant wall.

The present invention has been made in view of the above problems, and relates to a beam-column joint structure by a column that forms a structural surface of a building and a column that forms an additional damping body, without receiving a load from the beam of the structural surface, An object of the present invention is to provide a column-beam joint structure having in-plane rigidity against horizontal force in the in-plane direction of the framing surface and out-of-plane rigidity against horizontal force in the out-of-plane direction.

In order to achieve the above object, one aspect of a beam-column joint structure according to the present invention is
A column-beam joint structure, in which an additional vibration-damping column that constitutes an additional vibration-damping body is bonded to the steel-frame beam of the building structure formed by the steel-frame beam and the steel-frame column,
The first joint hardware is attached to the lower surface of the steel beam, and the second joint hardware is attached to the stigma of the additional damping column.
The first joining hardware is formed by joining two steel plates inclined to each other to a base plate,
The second joining metal article is formed by joining two steel plates inclined to each other to a base plate, and the two steel plates are the two steel sheets having the first joining article. It is in surface contact with each plate,
A first hole and a second hole are provided at corresponding positions of both the steel plates that are in surface contact with each other in the first and second joining hardware, and at least one of them is the additional damping column. Is a long hole extending in the longitudinal direction, and bolts are inserted into the first hole and the second hole to be joined by bolts.

According to this aspect, the first joint metal fittings and the second joint metal fittings respectively attached to the stigmas of the steel beam and the additional damping pillar are in surface contact with each other between the two steel plates inclined with each other, By constructing an additional damping body that does not receive the load from the beam of the structure surface by being bolted through the elongated hole extending in the longitudinal direction of the additional vibration damping column, it is possible to deal with the horizontal force in the in-plane direction of the structure surface. A column-beam joint structure having in-plane rigidity and out-of-plane rigidity against a horizontal force in the out-of-plane direction can be provided.

The construction surface of the building is formed by a plurality of steel-framed columns formed of a shaped steel material such as a rectangular steel pipe or an H-shaped steel, and a steel-framed beam connecting the steel-framed columns. The frame that forms the structure of the building may be either a brace frame (the joint between the steel beam and the steel column is a pin joint structure) or a frame frame (the joint between the steel beam and the steel column is a rigid joint structure). .. The additional damping body has additional damping columns and various dampers, and does not bear the vertical load of the building, and the damper functions against horizontal force during strong winds or earthquakes. In addition, as described above, the additional damping body is required not to bear the vertical load of the building and to be able to absorb the bending of the beam (here, the steel frame beam) forming the construction surface of the building.

In this aspect, only the first holes of the two steel plates of the first joining metal article have the long holes, and the second holes of the two steel plates of the second joining metal article have the round holes. It may be provided, the opposite form may be used, or both the first hole and the second hole may have long holes. Furthermore, one of the first holes of the two steel plates of the first joint metal article may be a long hole and the other may be a round hole, and similarly, the two steel plates of the second joint metal article. One of the second holes may be a long hole and the other may be a round hole. At least one of the first joint metal and the second joint metal has an elongated hole extending in the longitudinal direction of the additional damping column, so that the steel frame beam forming the structural surface of the building is connected to the first joint metal and the second joint metal. When a vertical load is applied to the additional damping column, the bolt can slide along the elongated hole in the longitudinal direction of the additional damping column. Therefore, even if a vertical load is input to the additional damping column, the additional damping column does not bear the input vertical load.

Also, when the steel beam is bent, the bending of the steel beam causes the first and second metal fittings to be displaced downward, and the vertical load downward from the first and second metal fittings to the additional damping column. However, since the bolt slides along the long hole in the longitudinal direction of the additional damping column, the additional damping column does not bear this vertical load.

Therefore, the bending of the steel frame beam can be absorbed by the column-beam joint structure (sliding of the bolt along the long hole forming the column-beam joint structure). Therefore, the additional damping body forming the beam-column joint structure of the present embodiment satisfies the above two requirements for considering the additional damping by the sliding of the bolt along the elongated hole.

Since the two steel plates that are inclined with respect to each other have the first joining metal object and the second joining metal object, the horizontal force is applied to the first joining metal object and the second joining metal object from any direction. Even if it acts, at least one of the two steel plates that are in surface contact with each other can oppose the horizontal force. Therefore, the beam-column joint structure has both in-plane rigidity against horizontal force in the in-plane direction and out-of-plane rigidity against horizontal force in the out-of-plane direction.

Further, the beam-column joint structure of this aspect can be applied to both a new building and an existing building. In the case of a new building, the additional damping body will be designed from the beginning of the design as a non-structural member that does not bear the vertical load. In a new building, for example, after the additional damping body is built, the internal constituent members (such as partition walls) of the building are constructed and the roof is constructed. Therefore, the load of the upper structure such as the roof can be input to the additional damping column constituting the column-beam joint structure of the present aspect, but the bolt is slidable along the long hole of the column-beam joint structure. , The additional damping column does not bear the load of the superstructure.

Furthermore, the steel beams of the building forming the beam-column joint structure may bend due to the load of the superstructure, but the additional damping column is not possible because the bolts are slidable along the long holes of the beam-column joint structure. The bending of the steel beam can be absorbed. Further, even when the additional damping body is post-installed on the existing building to form the beam-column joint structure of the present aspect, the bolt is slidable along the long hole of the beam-column joint structure, The additional damping column does not bear the load of the building, and the additional damping body can be post-installed while absorbing the bending of the already bent steel frame beam (without being affected by the bending).

Further, in another aspect of the beam-column joint structure according to the present invention, the two steel plates that are inclined with respect to each other in the first joint metal product and the second joint metal product are in a width direction of the structure surface. It is characterized in that it is inclined with respect to any of the directions orthogonal to the width direction.

According to this aspect, the two sets of steel plates, which are in surface contact with each other, of the first and second joining hardware, are oriented in the width direction of the structure surface and in any direction orthogonal to the width direction. Therefore, the two sets of steel plates can counter both the horizontal force in the in-plane direction and the horizontal force in the direction orthogonal to this.

Further, in another aspect of the beam-column joint structure according to the present invention, the two steel plates are formed by bending one steel plate into an L shape, and end portions of the two steel plates. It is one of a form in which parts are joined by welding to form an L-shape and a form in which the ends of two steel plates are separated to form a substantially L-shape. To do.

According to this aspect, it is possible to manufacture the first joint metal piece and the second joint metal piece by various processing methods such as bending and welding. Among them, since the base plate and the two steel plates are joined by welding, similarly, the two steel plates are also joined by welding their end portions, so that the processing method can be welded. It can be unified and the processing efficiency can be improved. In addition, compared with the configuration in which the ends of the two steel plates are separated, a configuration in which the ends of the two steel plates are joined by welding or a single steel plate is bent. According to the embodiment, the rigidity of the joint metal article is enhanced by the corner portions that are the welded portions and the bent portions. Here, the "L-shape" includes not only a form in which two steel plates are orthogonal to each other but also a form in which they intersect at an inclination angle close to 90 degrees (range of about 60 to 120 degrees).

Further, in another aspect of the beam-column joint structure according to the present invention, the additional damping body is a damping panel including at least the additional damping column and a damper.

According to this aspect, the bolt slides along the long hole extending in the longitudinal direction of the additional damping column provided in at least one of the first and second joints, so that the vertical load of the building is increased. It is possible to form a damping panel made of an additional damping body capable of absorbing the bending of the steel beam without burdening the load. Here, as the damper, in addition to a shape steel material such as a channel steel or an H-shape steel and a damper made of a (extreme) low yield point steel plate, a Σ-shaped damper made of a steel material having a Σ-shaped cross-section, and between the steel materials Various types of dampers such as a friction damper in which a friction material is clamped with a constant tightening force can be applied.

Further, the vibration damping panel of this aspect has various forms. For example, a damping panel formed by two additional damping columns and dampers disposed between the upper and lower steel beams that form the structure of the building can be given as an example. Also, two additional damping columns, which are arranged between the upper and lower steel beams that form the structure of the building, a damper attached to one of them, a damper and the other additional damping column Another example is a brace that connects the two and a damping panel formed by the brace. Further, it is formed by a damper directly attached to a steel frame column forming the building surface of the building, and upper and lower steel beam beams forming the building surface of the building and an additional damping column attached to the damper. Another example is a damping panel.

Further, in another aspect of the beam-column joining structure according to the present invention, the base plate having the first joining metal article is attached to the lower surface of the steel beam and a first piece extending parallel to the lower surface. A second piece extending downward from the end of the first piece,
An outer wall panel is attached to the second piece.

According to this aspect, the base plate having the first joint hardware is connected to the steel beam and is joined to the additional damping column constituting the additional damping body, and the outer wall panel is attached to the base plate, When the additional damping body is located near the outer wall panel of the building, it can have both the function of additional damping and the function of supporting the outer wall panel. Here, the first piece forming the base plate having the first joint metal object extends, for example, in the horizontal direction, and the second piece extending downward from the end of the first piece extends, for example, in the vertical direction. Set up. Further, the first piece and the second piece are formed from one member, and the first piece and the second piece may be formed by bending at a midway position of the one member, or the first piece and the second piece may be formed. It may be formed of two members, and the second piece may be connected to the first piece by welding or the like.

The outer wall panel is composed of an outer wall material formed of various siding boards and the like, a frame member, and a filled heat insulating material filled inside the frame member. The outer wall panel can be attached to the second piece by, for example, the frame member and the second piece of the outer wall panel having bolt holes at the corresponding positions, and the bolts being inserted therethrough.

In another aspect of the beam-column joint structure according to the present invention, a reinforcing rib extending over the first piece and the second piece is attached.

According to this aspect, the base plate having the first joint metal object is reinforced by the reinforcing rib extending over the first piece and the second piece, and the base plate has sufficient rigidity to support (a part of) the load of the outer wall panel. Can be granted.

Further, in another aspect of the beam-column joint structure according to the present invention, the vertical cross-sectional shape of the second piece is Z-shaped, and the upper floor separately located above the outer wall panel attached to the second piece is separately provided. The interference between the outer wall panel and the second piece is avoided.

According to this aspect, since the vertical cross-sectional shape of the second piece is the Z shape, the attachment location where the outer wall panel is attached to the second piece of the base plate is the outer wall panel of the upper floor and the outer wall panel of the lower floor. When it is near the part to be divided (part of the outer wall panel to be divided), it is possible to avoid interference between the outer wall panel on the upper floor and the second piece. That is, the second piece can be attached to and support the outer wall panel of the lower floor while avoiding interference with the outer wall panel of the upper floor.

Further, another aspect of the beam-column joint structure according to the present invention is that, in the column base of the additional damping column, a mounting bracket having a drop groove is attached.
A head bolt is attached below the outer wall panel,
By dropping the headed bolt into the dropping groove, the lower portion of the outer wall panel is engaged with the fitting.
An upper portion of the outer wall panel is attached to the second piece, and a lower portion of the outer wall panel is attached to a column base of the additional damping column via the attachment fitting.

According to this aspect, the upper part of the outer wall panel is attached to the second piece of the base plate having the first joint metal object fixed to the steel beam, and the lower part of the outer wall panel is attached to the second damping column of the additional damping column via the fitting. Since it is attached to the column base, it is possible to prevent the load of the outer wall panel from being concentrated on the mounting portion of the outer wall panel and the second piece, which may damage the second piece or reduce the durability. The stable support of the outer wall panel by the steel beam and the additional vibration damper can be realized.

As can be understood from the above description, according to the beam-column joint structure of the present invention, regarding the beam-column joint structure by the beam forming the structure of the building and the column forming the additional damping body, the load from the beam of the structure is applied. It is possible to provide a beam-column joint structure having in-plane rigidity with respect to horizontal force in the in-plane direction and out-of-plane rigidity with respect to horizontal force in the out-of-plane direction without receiving the horizontal force.

It is a front view of a construction including an example of a beam-column joint structure according to the first embodiment. It is a perspective view of an example of the 1st junction metal object and the 2nd junction metal object. It is the perspective view seen from a certain direction of an example of the beam-column joint structure concerning a 1st embodiment. It is the perspective view seen from another direction of an example of the beam-column joint structure concerning a 1st embodiment. (A), (b) is a perspective view which shows the modification of a 2nd joining metal object. It is a front view of a construction surface including a modification of an additional damping body. It is a figure which shows an example of the beam-column joint structure which concerns on 2nd Embodiment with an outer wall panel, a steel frame beam, and an additional damping column. It is the perspective view which looked at the 1st joining metal object which forms the beam-column joining structure concerning a 2nd embodiment from the slanting lower part.

Hereinafter, a beam-column joint structure according to an embodiment will be described with reference to the accompanying drawings. In the present specification and the drawings, substantially the same components may be denoted by the same reference numerals to omit redundant description.

[Column-beam joint structure according to the first embodiment]
First, an example of a beam-column joint structure according to the first embodiment will be described with reference to FIGS. 1 to 4. Here, FIG. 1 is a front view of a structure including an example of a beam-column joining structure according to the first embodiment, and FIG. 2 is a perspective view of an example of a first joining hardware and a second joining hardware. .. 3 and 4 are perspective views showing an example of the beam-column joint structure according to the first embodiment as viewed from different directions.

FIG. 1 shows a construction surface 10 of a building including an example of a beam-column joint structure 30 according to the embodiment, which is formed by incorporating an additional damping body 20. The structure surface 10 of the illustrated building has a frame structure formed by the steel frame columns 2 and the steel frame beams 1. When the joint between the steel column 2 and the steel beam 1 is a rigid joint, the frame 10 forms a rigid frame. When the joint between the steel column 2 and the steel beam 1 is a pin joint, the frame 10 forms a brace frame. In the case of the brace frame, for example, a load bearing wall (not shown) having a width of 0.5P or a width of 1P (1P is about 910 mm) may be incorporated in the construction surface.

Rigid joints between the steel frame columns 2 and the steel frame beams 1 are, for example, a form in which both are joined by a plurality of high tension bolts, a form in which the steel frame beams 1 are welded and joined to the steel frame columns 2, and a plurality of middle bolts are mutually spaced at predetermined intervals. It is formed by placing and joining both. On the other hand, the pin connection between the steel column 2 and the steel beam 1 is formed, for example, by connecting a plurality of middle bolts to each other at relatively narrow intervals. In the present specification, “welding” refers to groove welding (complete penetration welding, partial penetration welding), fillet welding, etc., depending on the strength required for the connecting portion and the joining mode (rigid connection, pin connection). The appropriate welding selected by the following is shown.

The base plate 2a is fixed to the foundation K by anchor bolts (not shown) or the like, and the steel frame column 2 joined to the base plate 2a by welding or the like is erected. Although the steel frame column 2 in the illustrated example is formed of H-shaped steel, it may be a steel frame column formed of a rectangular steel pipe. Further, although the construction surface 10 in the illustrated example shows a part of the construction surface of the first floor, the construction surface of the building in which the beam-column joint structure 30 is formed may be the second floor or higher, In this case, the floor beams on the lower floor will be installed instead of the foundation K.

The additional damping body 20 incorporated in the construction surface 10 includes two additional damping columns 3 and two dampers 4 arranged between the two additional damping columns 3. It is a vibration control panel. The number of dampers 4 is not limited to the illustrated example, and one or three or more dampers 4 may be applied.

The additional damping column 3 is made of H-section steel, and the leg portion 5 is welded to the H-section steel by welding to the column base. The leg portion 5 has a base 5a and a base 5a on which a plurality of plates are joined by welding, and the base plate 5b is fixed to the foundation K by anchor bolts (not shown) or the like.

A reinforcing plate 21 is welded to the inner side surfaces of the opposing flanges of the two additional damping columns 3, and the pair of reinforcing plates 21 has an (extreme) low yield strength made of H-shaped steel. The ends of the damper 4 made of dotted steel plates are joined by welding. Here, the damper 4 may be formed of a shaped steel material such as a grooved steel made of a (very) low yield point steel plate in addition to the H-shaped steel, and may be an oil damper, a viscoelastic damper, a friction damper, or a sectional shape. May be formed from a Σ type damper or the like made of Σ type steel material. In a friction damper, a tightening steel plate is arranged on one surface or both surfaces of two steel plates, a friction material is interposed between the steel plate and the tightening steel plate, and the tightening steel plate is tightened with a predetermined tightening force. A damper is formed by fastening and fixing (none of the members is shown).

As shown in FIG. 1, a beam-column joint structure 30 includes a steel beam 1 on a framing surface 10 of a building, an additional damping column 3 that forms an additional damping body 20, a first joining hardware 40 and a first joining metal piece 40 that connect them. And the two-joint metal fitting 50. As shown in FIG. 2, the first joining hardware 40 joined to the lower flange 11 of the steel beam 1 includes a steel base plate 41 and two steel plates 42 inclined with each other (center angle θ). It has, and is formed by welding and joining two steel plates 42 to the base plate 41. The base plate 41 has a round hole 41a through which a bolt is inserted when the lower flange 11 is bolted.

Each of the two steel plates 42 has a round hole 42a (an example of a first hole) through which the bolt 61 is inserted. Then, the ends of the two steel plates 42 are joined to each other via the welded portion Y, so that the steel plate 42 has an L-shape in plan view. Here, the central angle θ is, for example, 90 degrees.

On the other hand, the second joining hardware 50 joined to the stigma of the additional damping column 3 has a steel base plate 51 and two steel plates 52 that are inclined with respect to each other (center angle θ). The steel plate 52 is formed by welding to the base plate 51. The two steel plates 52 are in surface contact with the two steel plates 42 of the first joining hardware 40, respectively.

Each of the two steel plates 52 has a long hole 52a (an example of a second hole) through which the bolt 61 is inserted. Then, the ends of the two steel plates 52 are joined to each other through the welded portion Y, so that the steel plate 52 has an L-shape in plan view. Here, the central angle θ is, for example, 90 degrees.

The L-shaped steel plate 42 is disposed inside the L-shaped steel plate 52 and is in surface contact with each other, and is a medium bolt through the washer 63 to the corresponding round hole 42a and elongated hole 52a. By inserting the hexagon bolt 61 and tightening the nut 62 with the nut 62, the first joint metal piece 40 and the second joint metal piece 50 are joined.

In FIG. 2, L1 indicates the width direction of the construction surface 10, and L2 indicates the direction orthogonal thereto. Then, the L-shaped steel plates 42 and 52 are arranged so that the steel beam 1 is oriented so that the direction of θ/2 (45° when θ is 90 degrees), which is half the central angle, is oriented in the L2 direction. It is joined to the additional damping column 3.

As shown in FIGS. 3 and 4, in the first joint metal piece 40, the base plate 41 is bolted to the lower flange 11 of the steel beam 1 with hexagon bolts 65 and nuts 66, and the second joint metal piece 50 is the base plate 51. Is welded to the stigma of the additional damping column 3.

As shown in FIG. 3, in the steel plate 52 of the second joint hardware 50, a long hole 52a extending in the X direction, which is the longitudinal direction of the additional damping column 3, is opened, and the bolt 61 is slidable in the X direction. It is inserted (in a free manner). In particular, since the bolt 61 inserted in the long hole 52a is a medium bolt, sliding along the long hole 52a becomes possible. With such a configuration, when the building load (a part of the loading load in the building or the self-weight of the building) is input to the first joining hardware 40 via the steel beam 1, The joining hardware 40 slides in the X direction, which is the longitudinal direction of the additional damping column 3. In this way, the first bonded metal article 40 bonded to the steel beam 1 slides in the longitudinal direction of the additional vibration control column 3 along the long hole 52a of the second bonded metal article 50, whereby the additional vibration control body 20 is moved. A vertical load is not input to the additional damping column 3 to be formed, so that the additional damping column 3 does not bear the vertical load input to the first joint metal 40.

Further, as shown in FIG. 1, the steel beam 1 extending in the horizontal direction bends downward in a manner having the maximum bending amount at the central position. For example, in a low-rise steel-framed building, a bending of about 2 cm may be observed at the center position. In the case where the building having the construction surface 10 is a new building, the additional damping body 20 is already incorporated in the construction surface 10 at the stage when the roof is finally constructed, but at the stage when the roof is constructed, the steel frame is added. The beam 1 is generally bent downwards. Further, even when the building having the construction surface 10 is an existing building and the additional damping body 20 is retrofitted into the construction surface 10, the steel frame beam 1 is installed when the additional damping body 20 is incorporated. Bending down.

Even when the steel beam 1 is bent downward in this way, the first joining metal member 40 joined to the steel beam 1 is extended along the long hole 52a of the second joining metal member 50 along the length of the additional damping column 3. By sliding in the direction, the vertical load resulting from the bending of the steel frame beam 1 is not input to the additional damping column 3 forming the additional damping body 20. Therefore, the additional vibration damping body 20 can be incorporated into the construction surface 10 in a mode in which the additional vibration damping column 3 absorbs the bending of the steel beam 1. Particularly, in the post-construction in which the additional vibration damping body 20 is incorporated into the structure surface 10 of the existing building, it is possible to incorporate the additional vibration damping body 20 while absorbing the bending of the existing steel beam 1 (regardless of the bending). Therefore, good workability can be enjoyed.

From the above, the additional vibration damping body 20 can bear the horizontal force at the time of a strong wind or an earthquake and dampen the horizontal load by the damper 4, which is a component thereof, without bearing the vertical load of the building. it can.

In addition, the two steel plates 42 and 52 that are inclined with respect to each other and are included in the first joint metal piece 40 and the second joint metal piece 50 are in surface contact with each other, so that the first joint metal piece 40 and the second joint metal piece 50 are Regardless of which direction the horizontal force acts on, the steel plates 42, 52 of at least one set among the two sets of steel plates 42, 52 in surface contact with each other Can counter horizontal forces. Therefore, the beam-column joint structure 30 has both in-plane rigidity against horizontal force in the in-plane direction and out-of-plane rigidity against horizontal force in the out-of-plane direction of the framing surface 10. Therefore, at least one set of steel plates 42 and 52 of the two sets of steel plates 42 and 52 which are in surface contact with each other can be opposed to the horizontal force in any direction of 360 degrees.

In the column-beam joint structure 30 of the illustrated example, the first joint metal piece 40 and the second joint metal piece 50 each having the two steel plates 42 and 53 having the central angle θ of 90 degrees are half the central angle θ/2. The first joint metal piece 40 and the second joint metal piece 50 are attached so that the direction is oriented in a direction orthogonal to the width direction of the construction surface 10. Therefore, the two sets of steel plates 42 and 53 that are in surface contact with the first joint metal piece 40 and the second joint metal piece 50 oppose the horizontal force in the in-plane direction that is the width direction of the joint surface 10, and Even with respect to the horizontal force in the out-of-plane direction orthogonal to the width direction of 10, the two sets of steel plates 42 and 53, which are in surface contact with each other, of the first joint metal piece 40 and the second joint metal piece 50 oppose each other.

The additional damping body 20 having the additional damping columns 3 forming the beam-column joint structure 30 does not bear the vertical load of the building by the additional damping columns 3 and absorbs the bending of the steel beam 1 and within the construction surface 10. Being able to be incorporated into the structure, it can be "additional vibration damping", which is a non-structural member that does not affect the structural body. In the beam-column joint structure 30 of the illustrated example, a long hole 52a is formed in the steel plate 52 of the second joint metal piece 50, and a round hole 42a is formed in the steel plate 42 of the first joint metal piece 40. However, the steel plate 52 of the second joint metal piece 50 may have a round hole and the steel plate 42 of the first joint metal piece 40 may have a long hole, or the steel plates 42, 52. Both of them may have a long hole.

<Modification example of second joining metal object>
Next, with reference to FIG. 5, a modification of the second bonded metal article will be described. Here, both FIG. 5A and FIG. 5B are perspective views showing modified examples of the second joined metal article. Although FIG. 5 shows a modified example of the second bonded metal article as a representative, the same form can be applied to the modified example of the first bonded metal article.

In the second joining metal article 50A according to the modified example shown in FIG. 5A, one steel plate 53 is bent into an L-shape with respect to the base plate 51 through the bending portion 53a, and is joined by welding. It is a metal item. Then, in each piece of the steel plate 53, a long hole 53b is formed along the longitudinal direction of the additional damping column 3.

On the other hand, the second joining metal article 50B according to the modified example shown in FIG. 5B is formed by welding two steel plates 52 to the base plate 51. Unlike 50, the ends of the two steel plates 52 are not joined at the weld Y. Although the rigidity of the entire second joint metal piece is lower than that of the second joint metal piece 50, the labor of welding can be reduced.

<Modified example of the additional damping body>
Next, a modified example of the additional vibration damper will be described with reference to FIG. Here, FIG. 6 is a front view of a structure including a modified example of the additional damping body.

The additional damping body 20A shown in FIG. 6 has one additional damping column 3 and two dampers 4 arranged on one side of the additional damping column 3. A reinforcing plate 21 is welded to the inner surface of one of the steel columns 2 constituting the frame 10, and the damper 4 is welded to both the reinforcing plate 21 and the reinforcing plate 21 on the side of the additional damping column 3. Are joined together. Since the additional damping body 20A has one additional damping column 3, the beam-column joint structure 30 is also only one group that connects the stigma of the additional damping column 3 and the steel beam 1.

[Column-beam joint structure according to the second embodiment]
Next, an example of a beam-column joint structure according to the second embodiment will be described with reference to FIGS. 7 and 8. Here, FIG. 7 is a diagram showing an example of a beam-column joint structure according to the second embodiment together with an outer wall panel, a steel frame beam, and an additional damping column, and FIG. 8 is a column according to the second embodiment. It is the perspective view which looked at the 1st joining metal object which forms a beam joining structure from the slanting lower part.

As shown in FIG. 7, one additional damping column 3 that constitutes the additional damping body 20 is located on the side of the outer wall panel 70, and the beam-column joint structure 30A includes the first joint that is its constituent element. The outer wall panel 70 is attached to the base plate 45 of the metal fitting 40A and supports the outer wall panel 70, which is a difference from the beam-column joint structure 30.

The base plate 45 of the first joint metal piece 40A is attached to the lower surface of the lower flange 11 of the steel beam 1 in a state of being extended in parallel to the lower surface and at the end of the first piece 43. And a second piece 44 extending downward. In the illustrated example, the first piece 43 extends in the horizontal direction, and the second piece 44 extends in the vertical direction.

At the end of the first piece 43, the first piece 43 and the second piece 44 are joined by welding. Here, the first piece 43 and the second piece 44 may be formed by bending a common member.

As shown in FIG. 7, the first piece 43 is formed as a member longer than the width of the lower flange 11 of the steel beam 1. As shown in FIG. 8, four round holes 43a are opened, and the round holes 43a and the round holes (not shown) of the lower flange 11 are aligned with each other, and the bolts are inserted, so that The piece 43 and the lower flange 11 are bolted to each other.

As shown in FIG. 7, on the lower surface of the first piece 43, the ends of two steel plates 42 inclined with respect to each other are arranged in a state of being joined to each other via a welding portion Y. It is welded to the lower surface of 43.

As shown in FIGS. 7 and 8, the second piece 44 has a Z-shaped vertical cross-sectional shape. As shown in FIG. 7, among the Z-shaped second pieces 44, a piece recessed toward the indoor side. Is joined to the end of the first piece 43, and the piece protruding to the outdoor side is located below. Then, the outer wall panel 70A is attached to the piece of the second piece 44 that projects to the outdoor side.

As shown in FIG. 8, a plurality of reinforcing ribs 46 and 47 extending over the first piece 43 and the second piece 44 are attached to the first joint metal piece 40A. In the illustrated example, the central reinforcing rib 46 is formed of a substantially triangular steel plate, and the two reinforcing ribs 47 at the ends are formed of a rectangular steel plate. Note that, for example, all three reinforcing ribs may be formed of a substantially triangular steel plate or a rectangular steel plate, and the number of reinforcing ribs may be two or four or more.

The outer wall panel 70 includes an outer wall material 71, an outer heat insulating material 72, a frame member 73 formed by vertical and horizontal rails, and a filling heat insulating material 74 disposed inside the frame member 73. .. The outer wall material 71 is formed of a precast concrete panel, an extruded cement board, a lightweight cellular concrete board, a ceramic or metal siding board, or the like. The frame member 73 is formed by assembling shaped steel materials such as channel steel in a rectangular frame shape. The filled heat insulating material 74 is formed of glass wool, rock wool, or the like. Further, a ventilation layer 75 is formed between the outer wall surface material 71 and the outer heat insulating material 72 via a base material (not shown).

The round hole 44 a of the second piece 44 and the round hole (not shown) of the frame member 73 are aligned, the bolt 65 is inserted, and the nut 66 is tightened to tighten the lower hole with respect to the second piece 44. The outer wall panel 70A is joined.

Then, a separate outer wall panel 70B on the upper floor is disposed above the outer wall panel 70A on the lower floor, and a sealing material 76 is disposed at a horizontal joint between the lower and upper ends of both outer wall materials 71, The outer wall panel 70 is continuous vertically.

That is, in the illustrated example, the attachment location where the outer wall panel 70 is attached to the second piece 44 of the base plate 45 is near the location where the outer wall panel 70B on the upper floor and the outer wall panel 70A on the lower floor are separated. Therefore, for example, when the second piece is formed of a flat plate, the upper portion of the second piece may interfere with the outer wall panel 70B on the upper floor.

On the other hand, the illustrated second piece 44 has a Z-shaped longitudinal cross-section, and among the Z-shaped second pieces 44, the piece recessed toward the indoor side is joined to the end of the first piece 43. Therefore, the non-interference part 48 can be formed here, and the non-interference part 48 can avoid the interference between the outer wall panel 70B on the upper floor and the second piece 44. That is, the second piece 44 can be attached to and supported by the outer wall panel 70A of the lower floor while avoiding interference with the outer wall panel 70B of the upper floor.

Further, as shown in FIG. 7, a mounting bracket 80 having a drop groove 81 is attached to the column base 5 of the additional damping column 3. On the other hand, a headed bolt 68 is attached below the frame member 73 of the outer wall panel 70A so as to project toward the indoor side.

When mounting the outer wall panel 70A, first, the headed bolt 68 located below the frame member 73 is dropped into the drop groove 81 of the mounting fitting 80 to lower the outer wall panel 70A relative to the mounting fitting 80. Are engaged. Next, the outer wall panel 70A is attached to the steel beam 1 and the additional damping column 3 by joining the upper portion of the outer wall panel 70A to the second piece 44 of the base plate 45 with the bolt 65 and the nut 66.

In this way, the upper portion of the outer wall panel 70A is attached to the second piece 44 of the base plate 45 of the first joint metal piece 40A fixed to the steel beam 1, and the lower portion of the outer wall panel 70A is attached to the second piece 44 via the attachment fitting 80. By being attached to the column base 5 of the additional vibration damping column 3, the entire load of the outer wall panel 70A is concentrated on the attachment portion of the outer wall panel 70A and the second piece 44, and the second piece 44 and the like are damaged or endured. It is possible to eliminate the decrease.

There may be other embodiments in which other components are combined with the configurations and the like described in the above embodiments, and the present invention is not limited to the configurations shown here. This point can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

1: Steel beam, 2: Steel column, 2a: Base plate, 3: Additional damping column, 4: Damper, 5 column base, 5a: Footrest, 5b: Base plate, 10: Frame (structure), 11: Lower flange , 20, 20A: additional damping body, 21: reinforcing plate, 30, 30A: beam-column joint structure, 40, 40A: first joint metal, 41: base plate, 41a: round hole, 42: steel plate, 42a: Round hole (first hole), 43: first piece, 43a: round hole, 44: second piece, 44a: round hole, 45: base plate, 46, 47: reinforcing rib, 48: non-interference portion, 50, 50A , 50B: second joint metal fitting, 51: base plate, 52, 53: steel plate, 52a, 53b: long hole (second hole), 53a: bent portion, 61: bolt (hexagon bolt), 62: nut, 63 : Washer, 65: Bolt (hexagonal bolt), 66: Nut, 68: Head bolt, 70, 70A, 70B: Outer wall panel, 71: Outer wall material, 72: Outer insulation material, 73: Frame member, 74: Filled heat insulating material, 75: ventilation layer, 76: sealing material, 80: fitting, 81: drop groove, K: foundation, Y: welded part

Claims (8)

A column-beam joint structure, in which an additional vibration-damping column that constitutes an additional vibration-damping body is bonded to the steel-frame beam of the building structure formed by the steel-frame beam and the steel-frame column,
The first joint hardware is attached to the lower surface of the steel beam, and the second joint hardware is attached to the stigma of the additional damping column.
The first joining hardware is formed by joining two steel plates inclined to each other to a base plate,
The second joining metal article is formed by joining two steel plates inclined to each other to a base plate, and the two steel plates are the two steel sheets having the first joining article. It is in surface contact with each plate,
A first hole and a second hole are provided at corresponding positions of both the steel plates that are in surface contact with each other in the first and second joining hardware, and at least one of them is the additional damping column. Is a long hole extending in the longitudinal direction, and bolts are inserted into the first hole and the second hole to be bolt-joined to each other. In both the first and second joining hardware, the two steel plates that are inclined with respect to each other are inclined with respect to both the width direction of the construction surface and the direction orthogonal to the width direction. The beam-column joint structure according to claim 1, wherein: The two steel plates have a shape in which one steel plate is bent into an L-shape, and the ends of the two steel plates are joined by welding to have an L-shape. The column-beam joint structure according to claim 1 or 2, wherein the beam-column joint structure is one of the following configurations: a configuration in which the two steel plates are separated from each other at the ends thereof and has a substantially L shape. The column-beam joint structure according to any one of claims 1 to 3, wherein the additional damping body is a damping panel including the additional damping column and a damper. The base plate having the first joint metal member is attached to the lower surface of the steel frame beam and extends in parallel with the lower surface, and extends downward from an end portion of the first piece. And a second piece that is
The column-beam joint structure according to any one of claims 1 to 4, wherein an outer wall panel is attached to the second piece. The beam-column joint structure according to claim 5, wherein a reinforcing rib extending over the first piece and the second piece is attached. The vertical cross-sectional shape of the second piece is Z-shaped, and interference between the second outer piece and a separate outer wall panel on the upper floor located above the outer wall panel attached to the second piece is avoided. The beam-column joint structure according to claim 5 or 6, characterized in that. In the column base of the additional damping column, a mounting bracket having a drop groove is attached,
A head bolt is attached below the outer wall panel,
By dropping the headed bolt into the dropping groove, the lower portion of the outer wall panel is engaged with the fitting.
8. The upper part of the outer wall panel is attached to the second piece, and the lower part of the outer wall panel is attached to the column base of the additional damping column via the mounting metal fittings. The beam-column joint structure according to any one of 1.