JP2021025335A - Connection hardware and connection structure for steel structure member - Google Patents

Abstract

To absorb energy by performing shear plastic deformation to a vibration control damper, for enhancing workability of the vibration control damper.SOLUTION: Connection hardware for a vibration control damper comprises a base plate 41 whose one plane is connected to a connection end of a steel structure member, and a dowel plate 42 which is anchored so as to stand or hang at the other plane 41d of the base plate 41. In the dowel plate 42, a plurality of open holes 45, 46 and 47 arranged in a direction separating from the base plate 41 is formed, and the closest open hole 45 to the base plate 41 among them is smaller than the open hole 46 which is farther from the base plate 41 than the open hole 45.SELECTED DRAWING: Figure 4

Description

The present invention relates to a connecting metal fitting for connecting a steel structural member to a reinforced concrete structure or a structure having a steel-framed reinforced concrete structure, and a connecting structure including the structural member.

When connecting structural members such as steel columns, beams, and braces to a structure with a reinforced concrete structure or a steel-framed reinforced concrete structure, the connecting hardware is fixed to the skeleton on the structure side, and the steel structural members are connected to the connecting hardware. It is known to connect to the skeleton via.
For example, in Patent Document 1, reinforced concrete support portions are provided on the upper floor beam and the lower floor beam constituting the column-beam frame, and a steel material type as a vibration control member is provided between the upper and lower support portions. A seismic control stud to which a seismic control damper is connected via a connecting hardware (bracket) is disclosed. The steel type seismic damping damper is a member that absorbs the energy of shaking generated in a building during an earthquake by plastically deforming itself, and is formed of, for example, H-shaped steel. As for the connecting hardware, the shear force transmitting member and the anchor bolt are projected from the back surface of the base plate, and these shearing force transmitting member and the anchor bolt are embedded in the concrete of the supporting portion, so that the vibration damping damper is supported via the connecting hardware. Connected to.

This connection hardware has a shearing force transmitting member and anchor bolts protruding from the back surface of the base plate embedded in the concrete of the support part, so that when a predetermined horizontal load is applied to the vibration control damper, the vibration control part is vibration-damped. The displacement deformation of the damper can be suppressed to a small extent. Therefore, sufficient shear force transmission performance to the vibration control damper can be obtained. As a result, it is possible to reduce damage to the building by causing the seismic damping damper to undergo shear plastic deformation and absorb energy.

Japanese Unexamined Patent Publication No. 2003-129691

However, in the connecting hardware of Patent Document 1, a shear force transmitting member and an anchor bolt are embedded in the concrete of the supporting portion in order to suppress the displacement deformation of the vibration damping damper with respect to the supporting portion. Therefore, the shear force transmitting member and the anchor bolt may interfere with the reinforcing bars arranged in the support portion. A similar problem is considered when connecting a steel structural member not only to a seismic damping damper but also to a structure having a reinforced concrete structure or a steel-framed reinforced concrete structure. That is, in order to ensure the soundness of the reinforced concrete structure or the steel-framed reinforced concrete structure to which the structural members are connected, there is room for improvement in the connecting hardware and the connecting structure of the steel structural members.

The present invention has been made in view of the above-mentioned circumstances, and provides a connecting hardware and a connecting structure of a steel structural member capable of enhancing the soundness of the structure to which the steel structural member is connected. With the goal.

In order to solve the above problems, the present invention proposes the following means.
The connecting hardware of the structural member according to the present invention is a base plate in which the connecting end of the steel structural member is connected to one surface, and stands on the other surface of the base plate or stands up on the other surface. It is provided with a gibber plate fixed so as to hang down. A plurality of lightening portions arranged in a direction away from the base plate are formed on the gibber plate, and the first lightening portion closest to the base plate among the plurality of lightening portions is the first meat. It is smaller than the second lightening part, which is farther from the base plate than the lightening part.

The lightening portion is a hollow portion formed on the gibber plate. When a pulling force acts on the gibber plate, the ultimate proof stress may be determined by the tensile yield of the gibber plate (steel plate) in the vicinity of the first lightening portion of the gibber plate, unlike the case where the shearing force acts. Under such circumstances, by making the first lightening part smaller than the second lightening part, the size of the cross section (nett value, penetrating in the cross section) orthogonal to the length direction of the gibber plate (steel plate). The area occupied by the holes) can be made larger than that of the conventional gibber plate. As a result, the pull-out strength of the gibber plate can be increased without significantly changing the dimensions (length, width, thickness) of the gibber plate, and the gibber plate can be made smaller than before.
In addition, when the first lightening portion of the gibber plate is close to the surface of the concrete, the concrete may break in a cone shape starting from the position of the first lightening portion. By making the first lightening portion smaller than the second lightening portion, the pulling force resisted by the first lightening portion is suppressed, and cone-shaped fracture can be effectively suppressed. As a result, the soundness of the reinforced concrete structure or the steel-framed reinforced concrete structure to which the steel structural members are connected can be enhanced.

The plurality of lightening portions may be either one or both of the through holes formed in the gibber plate and the notches formed in the side edges of the gibber plate.
When the plurality of lightening portions are through holes formed in the gibber plate, the inner diameter of the first through hole, which is the first lightening portion, is the second through hole, which is the second lightening portion. It is made smaller than the inner diameter of the through hole of.
When the plurality of lightening portions are notches formed on the side edges of the gibber plate, the first notch portion which is the first lightening portion is the second lightening portion. It is made smaller than the second notch.

When the structural members are arranged in the reinforced concrete structure, the interlayer displacement is smaller than that of the steel frame structure, and is about several millimeters under wind load and about several tens of millimeters at most even during an earthquake. In order to efficiently transmit this interlayer displacement to the structural member, it is necessary to have a connection structure in which the rotational deviation of the structural member is small (that is, the rigidity is high).
Here, the rotational deviation of the structural member is caused by the extraction of the gibber plate arranged in parallel with the flange of the structural member. For this reason, it is very important to prevent the gibber plate from being pulled out (that is, to increase the rigidity against pulling out).

When a notch is formed on the side edge of the gibber plate as the lightening portion, the notch acts as an anchor to the concrete in addition to the above action, so that the dimensions (length, width, thickness) of the gibber plate are formed. ) Can be increased without significantly changing the resistance to extraction of the gibber plate.

The connection structure according to the present invention is a connection structure between a steel structural member and a skeleton of a reinforced concrete structure or a steel-framed reinforced concrete structure, and includes the connection hardware, and the gibber plate is embedded in the structure. ing.

By forming the first lightening portion of the gibber plate smaller than the second lightening portion and embedding it in the structure, the pulling force resisted by the first lightening portion is suppressed, and the cone of the structure is formed. State destruction can be effectively suppressed. Therefore, the displacement deformation of the gibber plate can be suppressed to be small, and the shear deformation can be concentrated on the structural member. As a result, damage to the building can be suppressed by effectively shear-plastically deforming the structural member to absorb energy.

Further, by forming the first lightening portion smaller than the second lightening portion, the cone-shaped fracture of the structure is effectively suppressed, so that the first lightening portion is formed on the surface of the structure. Can be approached to. Therefore, the length of the gibber plate can be made shorter than before. Thereby, for example, it is possible to suppress the interference of the gibber plate with the reinforcing bars arranged inside the structure and improve the soundness of the structure.

A reinforcing bar embedded in the structure may be further included, and the reinforcing bar may be arranged in the plurality of lightening portions inside the structural frame.

By embedding the reinforcing bars arranged in the lightening portion of the gibber plate in the structure, it is possible to more effectively suppress the cone-shaped fracture of the structure, and further enhance the yield strength and elastic rigidity of the gibber plate against extraction. it can.

According to the present invention, the soundness of a reinforced concrete structure or a steel-framed reinforced concrete structure to which a steel structural member is connected can be enhanced.

It is sectional drawing which shows the example which provided the connection metal fitting and the connection structure of 1st Embodiment which concerns on this invention on a seismic control stud. It is sectional drawing which follows the AA line of FIG. It is a perspective view which shows the lower connection structure of 1st Embodiment. It is sectional drawing which shows the IV part of FIG. 1 enlarged. It is sectional drawing which shows the V part of FIG. 2 enlarged. It is sectional drawing which shows the modification of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the connection structure of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows the connection structure of 3rd Embodiment which concerns on this invention. It is a graph which shows the relationship between the pull-out force and pull-out displacement by the lower connection structure of 1st Example and 2nd Example which concerns on this invention. It is a graph which shows the relationship between the pull-out force and pull-out displacement by the lower connection structure of the 3rd Example and the 4th Example which concerns on this invention. It is a graph which shows the relationship between the pull-out force and pull-out displacement by the lower connection structure of 1st Example and 5th Example which concerns on this invention. It is the schematic which shows the example which provided the connection structure of 4th Embodiment which concerns on this invention in shear link. It is the schematic which shows the example which provided the connection structure of 5th Embodiment which concerns on this invention in brace. It is sectional drawing which follows the line BB of FIG.

Hereinafter, an example in which the connecting metal fitting 35 and the connecting structure 30 of the structural member according to the embodiment of the present invention are applied to the building of the reinforced concrete structure 10 will be described.
(First Embodiment)
As shown in FIGS. 1 and 2, the reinforced concrete structure 10 is a frame-type structure including a beam 12 on the upper floor, a beam 14 on the lower floor, and a seismic control stud 20. The seismic control stud 20 is attached between, for example, the beam 12 on the upper floor and the beam 14 on the lower floor of the frame of the reinforced concrete structure 10. The vibration control stud 20 includes an upper support portion 21, a lower support portion 22, a steel-type vibration control damper (structural member) 25, and a connection structure 30.

The upper support portion 21 is a reinforced concrete structure that is vertically hung from the beam 12 on the upper floor and whose lower end surface 21a is located between the beam 12 on the upper floor and the beam 14 on the lower floor. The upper support portion 21 has, for example, a lower end surface 21a formed flat and rectangular. The lower support portion 22 is a reinforced concrete structure that is erected from the lower beam 14 and whose upper end surface (surface) 22a is located between the upper beam 12 and the lower beam 14. Similar to the upper support portion 21, the lower support portion 22 has, for example, an upper end surface 22a formed flat and rectangular. The lower end surface 21a of the upper support portion 21 and the upper end surface 22a of the lower support portion 22 are arranged at predetermined intervals in the vertical direction. A vibration damping damper 25 is arranged between the lower end surface 21a and the upper end surface 22a so as to face in the vertical direction.

The vibration damping damper 25 is connected to the lower end surface 21a and the upper end surface 22a by the connection structure 30 in a state of being arranged between the lower end surface 21a and the upper end surface 22a.
The vibration damping damper 25 includes a web 26 and a flange 27 at the upper connection end (connection end) 25a and the lower connection end (connection end) 25b. The vibration damping damper 25 is a steel damper having a cross section H formed by connecting flanges 27 to both ends of the web 26.
In the embodiment, an example in which the vibration control damper 25 is a steel material damper will be described, but the vibration control damper 25 is not limited to the steel material damper. As another example, the vibration damping damper 25 may be a friction damper, a viscoelastic damper, an oil damper, or a viscous damper.
The vibration damping damper 25 functions as a shearing panel when a predetermined horizontal load (shearing force Qu) is applied in a state of being connected to the lower end surface 21a and the upper end surface 22a by the connection structure 30.

The connection structure 30 includes an upper connection structure 31 and a lower connection structure 32. The upper connection structure 31 is connected to the upper connection end 25a of the vibration damping damper 25, for example, by welding. Therefore, by connecting the upper connection structure 31 to the lower end surface 21a side of the upper support portion 21, the upper connection end 25a of the vibration damping damper 25 is connected to the lower end surface 21a of the upper support portion 21 via the upper connection structure 31. It is connected to the side.
The lower connection structure 32 is connected to the lower connection end 25b of the vibration damping damper 25, for example, by welding. Therefore, by connecting the lower connection structure 32 to the upper end surface 22a side of the lower support portion 22, the lower connection end 25b of the vibration damping damper 25 is connected to the upper end surface 22a side of the lower support portion 22 via the lower connection structure 32. It is connected to the.
The upper connection structure 31 and the lower connection structure 32 are symmetrically configured in the vertical direction. Therefore, the lower connection structure 32 will be described below, and the detailed description of the upper connection structure 31 will be omitted.

As shown in FIGS. 3 to 5, the lower connecting structure 32 includes the connecting hardware 35 of the vibration damping damper 25, the first reinforcing bar (rebar) 36, the second reinforcing bar (rebar) 37, and the third reinforcing bar. (Reinforcing bar) 38 and included.
The connecting hardware 35 includes a base plate 41, a first gibber plate 42, and a second gibber plate 43.
The base plate 41 is formed in a rectangular shape in a plan view by two opposing long sides 41a and two opposing short sides 41b. In the base plate 41, the lower connecting end 25b of the vibration damping damper 25 is connected to the upper surface (one surface) 41c by welding, for example. Of the lower surface (the other surface) 41d of the base plate 41, the first gibber plates 42 are provided so as to face each other in the vicinity of the two short sides 41b at intervals.

The first gibber plate 42 is formed, for example, so that the length dimension of the first gibber vertical side 42a extending in the vertical direction is larger than the width dimension of the first gibber horizontal side 42b extending in the horizontal direction (horizontal direction). It is a rectangular steel plate. In the first gibber plate 42, the lower surface of the base plate 41 is formed by connecting the upper first gibber lateral side 42b to the vicinity of one of the two short sides 41b of the base plate 41 by welding, for example. It is fixed so as to hang down from 41d. The first gibber plate 42 is provided along the flange 27 below the flange 27 of the vibration damping damper 25.
The first gibber plate 42 has circular through holes (lightening portions) 45, 46, 47 that are arranged in a direction away from the base plate 41 and are formed at intervals. In the first embodiment, as the plurality of through holes 45, 46, 47, for example, a first through hole 45, a second through hole 46, and a third through hole (second through hole) 47 are provided. This will be explained as an example, but the present invention is not limited to this.

The first through hole 45 is arranged at a position closest to the base plate 41 among the first through hole 45, the second through hole 46, and the third through hole 47. The second through hole 46 is arranged at a position farther from the base plate 41 than the first through hole 45. The third through hole 47 is arranged at a position farther from the base plate 41 than the second through hole 46. The second through hole 46 and the third through hole 47 are formed to have the same size. The hole diameter (inner diameter) d1 of the first through hole 45 is formed to be smaller than the hole diameter (inner diameter) d2 of the second through hole 46 and the third through hole 47.

Of the lower surface 41d of the base plate 41, the first gibber plate 42 is provided in the vicinity of the two short sides 41b at intervals. The first reinforcing bar 36 is inserted into the first through hole 45 of the two first gibber plates 42, and both end portions 36a are bent downward. Further, in the two first gibber plates 42, the first reinforcing bar 36 is inserted into the second through hole 46, and both end portions 36a are bent downward. Further, in the two first gibber plates 42, the second reinforcing bar 37 is inserted into the third through hole 47, and the portions 37a near both ends are bent downward. Both ends 37b of the bent portion are horizontally bent inward.

Of the lower surface 41d of the base plate 41, the second gibber plate 43 is provided so as to face the two long sides 41a at intervals. The second gibber plate 43 has, for example, a rectangle formed so that the length dimension of the second gibber vertical side 43a extending in the vertical direction is smaller than the width dimension of the second gibber horizontal side 43b extending in the horizontal direction (horizontal direction). It is a steel plate with a shape. The second gibber plate 43 is formed by connecting the upper second gibber lateral side 43b to a portion of the two long sides 41a of the base plate 41 from one long side 41a, for example, by welding. It is fixed so as to hang down from the lower surface 41d of the base plate 41. That is, the second gibber plate 43 is provided along the web 26 below the web 26 of the vibration damping damper 25.

The second gibber plate 43 has a plurality of fourth through holes 48 formed at intervals along the long side 41a of the base plate 41.
A second gibber plate 43 is provided at a portion closer to the two long sides 41a of the lower surface 41d of the base plate 41 at intervals. A third reinforcing bar 38 is inserted into the fourth through hole 48 of the two second gibber plates 43, and both end portions 38a project linearly outward from the fourth through hole 48.

The connecting metal fitting 35 is integrally formed by fixing the two first gibber plates 42 and the two second gibber plates 43 to the lower surface 41d of the base plate 41. The two first gibber plates 42 and the two second gibber plates 43 are embedded inside the lower support portion 22. The concrete of the lower support portion 22 is formed in the first through hole 45, the second through hole 46 and the third through hole 47 of the first gibber plate 42, and the fourth through hole 48 of the second gibber plate 43. Is filled.

Further, inside the lower support portion 22, the first reinforcing bar 36 is inserted into the first through hole 45 and the second through hole 46 of the first gibber plate 42 of the connecting hardware 35, and the third through hole 47 is inserted. A second reinforcing bar 37 is inserted into the. Further, a third reinforcing bar 38 is inserted into the fourth through hole 48 of the second gibber plate 43 of the connecting hardware 35. That is, the first reinforcing bar 36, the second reinforcing bar 37, and the third reinforcing bar 38 are embedded inside the lower support portion 22.
In this state, the lower surface 41d of the base plate 41 comes into contact with the upper end surface 22a of the lower support portion 22. The base plate 41 is in contact with the upper end surface 22a of the lower support portion 22, and the two first rebar plates 42, the two second gibber plates 43, the first reinforcing bar 36, and the second reinforcing bar 37. , And a third reinforcing bar 38, which is fixed to the upper end surface 22a side.

As shown in FIGS. 1 and 4, the upper connection structure 31 has two first gibber plates 42 on the upper surface (the other surface) 41c of the base plate 41 symmetrically with the lower connection structure 32 in the vertical direction. And two second gibber plates 43 are fixed so as to stand upright. Further, the upper connection end 25a of the vibration damping damper 25 is connected to the lower surface (one surface) 41d of the base plate 41 by welding, for example.
The base plate 41 of the upper connection structure 31 is in contact with the lower end surface 21a of the upper support portion 21, and has two first gibber plates 42, two second gibber plates 43, and a first reinforcing bar 36. , A second reinforcing bar 37, and a third reinforcing bar 38.

In this state, for example, a bending moment Mu and a shearing force Qu act on the vibration control damper 25 due to an earthquake or a wind load. The bending moment Mu mainly acts on the flange 27. The shear force Qu mainly acts on the web 26.
When the shear force Qu acts on the web 26 of the vibration damping damper 25, a force that resists the shear force Qu acts on the fourth through hole 48 and the third reinforcing bar 38 of the second gibber plate 43. Therefore, with respect to the shearing force Qu acting on the web 26 of the vibration damping damper 25, the displacement deformation of the lower connection structure 32 with respect to the upper end surface 22a of the lower support portion 22 can be suppressed to be small.
Similarly, with respect to the shearing force Qu acting on the web 26 of the vibration damping damper 25, the displacement deformation of the upper connection structure 31 with respect to the lower end surface 21a of the upper support portion 21 can be suppressed to be small.

Further, the bending moment Mu acts on the flange 27 of the vibration damping damper 25, so that the pulling force F acts on the first gibber plate 42. When the pulling force F acts on the first gibber plate 42, the ultimate proof stress may be determined by the tensile yield of the first gibber plate 42 in the vicinity of the first through hole 45 of the first gibber plate 42. Conceivable.

As shown in FIGS. 4 and 5, the first through hole 45 is formed to have a smaller hole diameter d1 than the hole diameter d2 of the second through hole 46. By making the hole diameter d1 of the first through hole 45 smaller than the hole diameter d2 of the second through hole 46, the size of the net cross section orthogonal to the length direction of the first gibber plate 42 (that is, the size of the net cross section in the cross section). The area occupied by one through hole) can be increased as compared with the conventional gibber plate. As a result, the pull-out strength of the first gibber plate 42 can be increased without significantly changing the dimensions (length, width, thickness) of the first gibber plate 42, and the first gibber plate 42 can be made compact. ..

In addition, when the first through hole 45 of the first gibber plate 42 is close to the upper end surface (surface) 22a of the lower support portion 22, the lower support portion 22 starts from the position of the first through hole 45. It is conceivable that the concrete will break like a cone. As a result, by making the hole diameter d1 of the first through hole 45 smaller than the hole diameter d2 of the second through hole 46, the pulling force resisted by the first through hole 45 is suppressed, and cone-shaped fracture is effectively performed. Can be suppressed.
In this way, by making the hole diameter d1 of the first through hole 45 smaller than the hole diameter d2 of the second through hole 46, the first gibber with respect to the bending moment Mu acting on the web 26 of the vibration damping damper 25. The displacement deformation of the plate 42 can be suppressed to a small value.
Similarly, with respect to the bending moment Mu acting on the web 26 of the vibration damping damper 25, the displacement deformation of the upper connection structure 31 (see FIG. 1) with respect to the lower end surface 21a of the upper support portion 21 can be suppressed to be small.
As a result, when the bending moment Mu and the shearing force Qu act on the damping damper 25 due to an earthquake or wind load, the damping damper 25 is effectively sheared and plastically deformed to absorb energy and damage the building. Can be suppressed.

Further, the first through hole 45 is formed on the upper side of the concrete of the lower support portion 22 by forming the hole diameter d1 of the first through hole 45 to be small and the concrete of the lower support portion 22 effectively suppresses the cone-shaped fracture. It can be brought closer to the end face 22a. Therefore, the length dimension (that is, the total length) of the first gibber vertical side 42a of the first gibber plate 42 can be kept short and compactly formed. Thereby, for example, the workability of the vibration damping damper 25 can be improved by suppressing the first gibber plate 42 from interfering with the reinforcing bars (not shown) arranged inside the lower support portion 22. ..

Further, the first reinforcing bar 36, the second reinforcing bar 37, and the third reinforcing bar 38 are embedded inside the upper support portion 21 and inside the lower support portion 22. As a result, the cone-shaped fracture of the concrete of the upper support portion 21 and the lower support portion 22 can be more effectively suppressed, and the yield strength and elastic rigidity of the first gibber plate 42 against extraction can be further increased.

(Modification example 1)
A modified example of the first embodiment is shown in FIG. In this modification, the first gibber plate 42 has semicircular notches (lightening portions) 48, 49, and 50 formed at intervals on two sides of the base plate 41 separated in the width direction. The first notch 48 is arranged at a position closest to the base plate 41 among the first notch 48, the second notch 49, and the third notch 50. The second notch 49 is arranged at a position farther from the base plate 41 than the first notch 48. The third notch 50 is arranged at a position farther from the base plate 41 than the second notch 49. The second notch 49 and the third notch 50 are formed to have the same shape and the same size. The radius (r1) of the first notch 48 is formed smaller than the radius (r2) of the second notch 49 and the third notch 50. Although a plurality of through holes 40 are formed in the first gibber plate 42, the through holes 40 have the same hole diameters, and therefore the through holes 40 do not correspond to the lightening portion in the present invention.

According to this modification, the radius r1 of the first notch 48 is smaller than the radius r2 of the second notch 49. That is, the first notch 48 is smaller than the second notch 49. By doing so, the size of the net cross section orthogonal to the length direction of the first gibber plate 42 (excluding the area of the portion occupied by the first notch in the cross section) can be adjusted to the conventional gibber plate. Can be made larger than. As a result, the pull-out strength of the first gibber plate 42 can be increased without significantly changing the dimensions (length, width, thickness) of the first gibber plate 42, and the first gibber plate 42 can be made larger than before. It can be made smaller.
Further, by intentionally reducing the size of the first notch 48, the pulling force resisted by the first notch 48 is suppressed, and cone-shaped fracture can be effectively suppressed. As a result, the soundness of the building to which the vibration damping damper 25 is connected can be improved.

In the present embodiment, an example in which the connecting hardware 35 and the connecting structure 30 of the vibration damping member are applied to the reinforced concrete structure 10 will be described, but the present invention is not limited thereto. As another example, the connecting hardware 35 and the connecting structure 30 may be applied to a building having a steel-framed reinforced concrete structure or a building having a steel-framed structure. When the connecting hardware 35 and the connecting structure 30 are applied to a building having a steel structure, the connecting structure 30 is installed on a portion of a foundation (made of reinforced concrete) that supports the frame of the steel structure.
Further, the connecting hardware 35 and the connecting structure 30 may be used to connect structural members such as simple columns, beams, and braces to the skeleton instead of the vibration damping members.

Hereinafter, the connecting hardware of the vibration control dampers of the second embodiment and the third embodiment will be described with reference to FIGS. 7 and 8. Further, the connection structures of the fourth embodiment and the fifth embodiment will be described with reference to FIGS. 12 and 13. In the second to fifth embodiments, the same and similar members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

(Second Embodiment)
As shown in FIG. 7, the connection hardware 100 has the same configuration as the connection hardware 35 of the first embodiment except that the first gibber plate 102 is different from the first gibber plate 42 of the first embodiment. is there.
The first gibber plate 102 has a plurality of notches 104 formed on the vertical side (side edge) 102a of the first gibber. The notch 104 is formed, for example, in a semicircular shape. The plurality of cutout portions 104 are formed on the vertical side 102a of the first gibber so as to be arranged in a direction away from the base plate 41 and at intervals.

By the way, especially when the seismic damping damper 25 is arranged in the reinforced concrete structure, the interlayer displacement is smaller than that of the steel frame structure, and is about several millimeters at the time of wind load and about several tens of millimeters at most even at the time of an earthquake. In order to efficiently transmit this interlayer displacement to the vibration control damper 25, it is necessary to have a connection structure in which the rotation deviation of the vibration control damper 25 is small (that is, the rigidity is high).
Here, the rotational deviation of the vibration damping damper 25 is caused by the extraction of the first gibber plate 102 arranged in parallel along the flange 27 of the vibration damping damper 25. Therefore, it is important to prevent the first gibber plate 102 from being pulled out (that is, to increase the rigidity against pulling out).

Therefore, in the second embodiment, the cutout portion 104 is formed on the first gibber vertical side 102a of the first gibber plate 102. Therefore, the bearing area between the first gibber plate 102 and the lower support portion 22 can be increased. As a result, the yield strength and elastic rigidity of the first gibber plate 102 against extraction can be increased without significantly changing the plate size and thickness of the first gibber plate 102.
Further, by forming a plurality of notches 104 on the vertical side 102a of the first gibber, the proof stress and elasticity of the first gibber plate 102 against extraction are not changed without changing the plate size and thickness of the first gibber plate 102. The rigidity can be further increased. Therefore, the displacement deformation of the first gibber plate 102 can be suppressed, and the first gibber plate 102 can be formed more compactly. As a result, the vibration damping damper 25 can be effectively shear-plastically deformed to absorb energy more well, and the interference of the lower support portion 22 by the first gibber plate 102 with the reinforcing bars is suppressed to further improve the workability. be able to.

(Third Embodiment)
As shown in FIG. 8, the connection hardware 200 has the same configuration as the connection hardware 100 of the second embodiment except that the first gibber plate 202 is different from the first gibber plate 102 of the second embodiment. is there.
The first gibber plate 202 has a plurality of notches 204 formed on the vertical side (side edge) 202a of the first gibber. The notch 204 is formed, for example, in a V-shaped concave shape. The plurality of cutouts 204 are formed on the vertical side 202a of the first gibber so as to be arranged in a direction away from the base plate 41 so that the unevenness is continuous.

Therefore, the bearing area between the first gibber plate 202 and the lower support portion 22 can be increased. As a result, the yield strength and elastic rigidity of the first gibber plate 202 against extraction can be increased without significantly changing the plate size and thickness of the first gibber plate 202.
Further, by forming a plurality of notches 204 on the vertical side 202a of the first gibber, the proof stress and elasticity of the first gibber plate 202 against extraction are not changed without changing the plate size and thickness of the first gibber plate 202. The rigidity can be further increased. Therefore, the displacement deformation of the first gibber plate 202 can be suppressed, and the first gibber plate 202 can be formed more compactly. As a result, the vibration damping damper 25 can be effectively shear-plastically deformed to absorb energy more well, and the interference of the lower support portion 22 by the first gibber plate 202 with the reinforcing bars is suppressed to further improve the workability. be able to.

(Example)
Hereinafter, the relationship between the tensile force and the pull-out displacement will be described with reference to the graphs of Table 1, FIGS. 9 to 11, taking the first gibber plate of the first to fifth embodiments as an example. In Table 1, the first gibber plate of the first to fifth embodiments is, for example, a member corresponding to the first gibber plate 42 of the first embodiment. Further, the first through holes and other through holes of the first to fifth embodiments are, for example, the first through holes 45, the second and third through holes 46, 47 of the first embodiment. It is a hole corresponding to. Further, the hole diameters of the first through hole and the other through holes will be described by adding the hole diameters d1 and d2 of the first embodiment. The embedding depth L of the first through hole is, for example, the distance from the upper end surface 22a of the lower support portion 22 of the first embodiment to the center of the first through hole 45. Further, the notch portion is, for example, a portion corresponding to a plurality of notch portions 104 formed on the vertical side 102a of the first gibber of the second embodiment.
Further, in FIGS. 9 to 11, the vertical axis represents the tensile force (kN) and the horizontal axis represents the withdrawal displacement (mm). Further, the first gibber plate of the first embodiment will be described as G1, and the first gibber plate of the second embodiment will be referred to as G2. Further, the first gibber plate of the third embodiment will be referred to as G3, the first gibber plate of the fourth embodiment will be referred to as G4, and the first gibber plate of the fifth embodiment will be referred to as G5.

First, the relationship between the tensile force and the pull-out displacement of the first gibber plate of the first embodiment and the first gibber plate of the second embodiment will be described with reference to Tables 1 and 9.
As shown in Table 1, in the first gibber plate of the first embodiment and the second embodiment, the embedding depth L of the first through hole is set as large as 210 mm. In addition, in the first gibber plate of the second embodiment, the first through hole is formed to have a hole diameter d1 smaller than the hole diameter d2 of the other through holes. Therefore, the tensile yield of the first gibber plate can be delayed in the vicinity of the first through hole.
As a result, as shown in FIG. 9, the pulling force of the graph G2 becomes larger than the pulling force of the graph G1. By forming the hole diameter d1 of the first through hole small in this way, the pulling force (that is, the ultimate proof stress) from which the first gibber plate is pulled out from the upper end surface 22a of the lower support portion 22 is increased by about 13%. You can see that you can.

Next, the relationship between the tensile force and the pull-out displacement of the first gibber plate of the third embodiment and the first gibber plate of the fourth embodiment will be described with reference to Tables 1 and 10.
As shown in Table 1, in the first gibber plate of the third embodiment and the fourth embodiment, the embedding depth L of the first through hole is suppressed to a small value of 100 mm. In addition, in the first gibber plate of the third embodiment, the first through hole is formed to have a hole diameter d1 smaller than the hole diameter d2 of the other through holes. As described above, according to the first gibber plate of the third embodiment, the hole diameter d1 of the first through hole is formed to be small in a state where the embedding depth L of the first through hole is kept small. , It is possible to effectively prevent the concrete of the lower support portion 22 from breaking into a cone shape.

As a result, as shown in FIG. 10, the pulling force of the graph G3 becomes larger than the pulling force of the graph G4. In this way, in a state where the embedding depth L of the first through hole is kept small, by forming the hole diameter d1 of the first through hole small, the first gibber from the upper end surface 22a of the lower support portion 22 It can be seen that the pull-out force (ultimate proof stress) from which the board is pulled out can be increased by about 8%.

Next, the relationship between the tensile force and the pull-out displacement of the first gibber plate of the fifth embodiment and the first gibber plate of the first embodiment will be described with reference to Tables 1 and 11.
As shown in Table 1, in the first gibber plate of the fifth embodiment and the first embodiment, the embedding depth L of the first through hole is set as large as 210 mm. In addition, the first gibber plate of the fifth embodiment has a plurality of notches formed on the vertical sides of the first gibber. Therefore, the initial proof stress and initial rigidity due to the extraction of the first gibber plate with respect to the lower support portion 22 can be increased.

As a result, as shown in FIG. 11, the initial pulling force of the graph G5 becomes larger than the initial pulling force of the graph G1. By forming a plurality of notches on the vertical side of the first gibber in this way, the initial pull-out force (that is, the initial proof stress) from which the first gibber plate is pulled out from the upper end surface 22a of the lower support portion 22 is about 44. It turns out that it can be increased by%.
On the other hand, the ultimate withdrawal force (that is, the ultimate proof stress) of the graph G5 is about 15% smaller than the ultimate withdrawal force of the graph G1. The final proof stress of the graph G5 can be increased by, for example, combining with a measure of changing the hole diameter d1 of the first through hole 45 or adjusting the thickness of the first gibber plate.

In the first to third embodiments, an example in which the vibration control damper 25 is connected to the vibration control stud 20 by using the connection hardware 35 and the connection structure 30 of the vibration control damper has been described, but the present invention is not limited to this. Absent. As another example, an example of a shear link type vibration control damper including a vibration control damper 25 and a connecting hardware 35 will be described with reference to FIG. 12, and a brace type vibration control damper will be described with reference to FIGS. 13 and 14.

(Fourth Embodiment)
As shown in FIG. 12, the reinforced concrete structure 300 includes adjacent reinforced concrete columns 301 and 302, a first support portion 303 provided on one column 301, and a second support portion provided on the other column 302. It includes a vibration control damper 25 erected between the 304, the first and second support portions 303 and 304, and a connection structure 30. In this structure, the seismic control studs 20 of the first embodiment are arranged not between the beams on the upper and lower floors but between the columns 301 and 302 adjacent to each other on the left and right.

When the structure in which the reinforced concrete structure 300 is adopted is swayed by an earthquake or a strong crosswind, the columns 301 and 302 are locally tilted in the same direction. Along with this, the first support portion 303 and the second support portion 304 are displaced so as to be separated from each other in the length (height) direction of the structure. Therefore, the vibration damping damper 25 is provided with a bending moment Mu. Although the shearing force Qu acts, the vibration damping damper 25 can be effectively sheared and plastically deformed to absorb the shaking energy satisfactorily as in the first embodiment.

(Fifth Embodiment)
As shown in FIGS. 13 and 14, the reinforced concrete structure 400 has an upper intersection 404 of the upper beam 401 and one column 403 and a lower intersection 405 of the lower beam 402 and the other column 403. A seismic control brace 410 is erected diagonally between them. The upper end of the seismic control brace 410 is connected to the upper connecting hardware (bracket) 404a installed at the upper intersection 404, and the lower end of the brace 410 is connected to the lower connecting hardware (bracket) installed at the lower intersection 405. ) It is connected to 405a.
Since the connecting hardware 404a and 405a have the same structure, the lower connecting hardware 405a will be described below, and the description of the connecting hardware 404a will be omitted.

The connecting hardware 405a includes a first base plate 411, a second base plate 412, and a plurality of gibber plates 420. A part of the plurality of gibber plates 420 is fixed so as to hang down from the lower surface of the first base plate 411, and the rest of the plurality of gibber plates 420 is in a direction parallel to the beam 402 from the side surface of the second base plate 412. It is fixed so as to extend to. Each gibber plate 420 has a plurality of through holes 45, 46, 47 formed at intervals in a direction away from the base plate 41, and the plurality of through holes 45, 46, 47 are included in the reinforced concrete structure 400. After the reinforcing bar 36 is inserted, it is buried and fixed in concrete.
Thereby, according to the fourth embodiment, similarly to the above-described embodiment, the vibration control brace 410 can be effectively shear-plastically deformed to absorb energy more satisfactorily.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
In addition, it is possible to replace the constituent elements in the above-described embodiment with well-known constituent elements as appropriate without departing from the spirit of the present invention, and the above-described embodiments and examples may be appropriately combined.

10,300,400 Reinforced concrete structure 21 Upper support (structure)
22 Lower support (structure)
25 Vibration control damper 25a Upper connection end (connection end)
25b Lower connection end (connection end)
30 Connection structure 31 Upper connection structure 32 Lower connection structure 35,100,200 Connection hardware for vibration control damper 36,37,38 First, second and third reinforcing bars (reinforcing bars)
41 Base plate 41c Upper surface of the lower base plate (one surface), upper surface of the upper base plate (the other surface)
41d Lower surface of the lower base plate (the other surface), lower surface of the upper base plate (one surface)
42, 102, 202 First gibber plate (gibel plate)
43 Second gibber plate 45 First through hole 46 Second through hole 47 Third through hole (second through hole)
102a, 202a First gibber vertical side (side edge)
104,204 Notch

Claims (6)

A base plate in which the connecting ends of steel structural members are connected to one side,
The other surface of the base plate is provided with a gibber plate fixed so as to stand or hang on the other surface.
The gibber plate is formed with a plurality of lightening portions arranged in a direction away from the base plate.
The first lightening portion closest to the base plate among the plurality of lightening portions is a steel structural member smaller than the first lightening portion and smaller than the second lightening portion far from the base plate. Connection hardware. The steel structure according to claim 1, wherein the plurality of lightening portions are one or both of a through hole formed in the gibber plate and a notch formed in a side edge of the gibber plate. Connecting hardware for members. The plurality of lightening portions are through holes formed in the gibber plate, and the inner diameter of the first through hole, which is the first lightening portion, is the second through hole, which is the second lightening portion. The connecting metal fitting for a steel structural member according to claim 1, which is smaller than the inner diameter of the through hole of. The plurality of lightening portions are notches formed on the side edges of the gibber plate, and the first notch portion which is the first lightening portion is the second lightening portion. The connecting hardware for a steel structural member according to claim 1, which is smaller than the second notch. It is a connection structure between a steel structural member and a reinforced concrete structure or a skeleton of a steel-framed reinforced concrete structure.
Including the connecting hardware according to any one of claims 1 to 4,
A connection structure in which the gibber plate is embedded in the structural frame. Further including reinforcing bars embedded in the structural skeleton,
The connection structure according to claim 5, wherein the reinforcing bars are arranged in the plurality of lightening portions inside the structural frame.

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