JP5261040B2 - Damper mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bring about the effective action of a viscoelastic damper and a friction one. <P>SOLUTION: In this damper mounting structure, a damper body D, in which a plurality of arm members 3 are pivoted and connected to one another, is provided; both ends of the damper body D are separately pivoted and connected to different structural members 2 of a building, respectively; and the viscoelastic damper 5, which is mounted across the damper body D and members to be connected to each other among the structural members 2 and which suppresses the radial relative displacement and relative rotation of the connecting pivots 7 of the members by a viscoelastic force, and the friction damper 6, which is mounted across the members to be connected to each other and which suppresses the relative rotation of the members by a frictional force, are separately provided in at least two pivotal connecting portions 4 among pivotal connecting portions 4 between the arm members 3 and pivotal connecting portions 4 between the damper body D and the structural member 2, respectively. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention includes a damper main body in which a plurality of arm members are connected to each other, and both ends of the damper main body are connected to different structural members of the building, respectively, and the relative displacement of the members is connected to the connecting portion between the arm members. The present invention relates to a damper mounting structure in which a damper for suppressing the above is interposed.

Conventionally, as this type of damper mounting structure (hereinafter simply referred to as a first conventional example), as shown in FIG. 5, a damper body D is disposed diagonally in a building space of a building, and both ends are different from each other in the building. Some of them are rigidly connected to the structural member 2 (see, for example, Patent Document 1).
The damper body D is configured by arranging three arm members 3 in a straight line along the longitudinal direction and connecting adjacent arm members 3 in a slidable state along the longitudinal direction. Of the connecting portions between the arm members 3, the viscoelastic damper 20 is connected to one connecting portion, and the friction damper 21 is connected to the other connecting portion. It is interposed in. Furthermore, a stopper 22 for restricting the upper limit of deformation of the viscoelastic damper 20 is also provided.
Therefore, when the building frame is deformed by receiving an external force and the structural members 2 are relatively displaced in the perspective direction, only the viscoelastic damper 20 is deformed and the damper effect is applied to a small deformation. On the other hand, for large deformation, the stopper 22 restricts the deformation of the viscoelastic damper 20 and the friction damper 21 is deformed to exhibit a damper effect.
Further, as a different conventional example (hereinafter simply referred to as a second conventional example), as shown in FIG. 6, there is provided a damper body D configured by pivotally connecting two arm members 3 and both end portions thereof. Have been pivotally connected to the structural members 2 of different buildings (see, for example, Patent Document 2).
Further, each of the pivot connecting portions 4 at both ends of the damper main body D and the pivot supporting connecting portion 4 (the pivot connecting portion 4 between the arm members 3) in the middle in the longitudinal direction of the damper main body D is attached to each of them. The elastic damper 23 was interposed (for example, refer patent document 1).
This conventional example is configured to suppress the displacement of the building by a viscoelastic damper 23 interposed in each pivot connection portion 4.

JP 2000-257664 A (FIG. 1) Japanese Patent Laid-Open No. 11-6536 (FIG. 24)

According to the first conventional example of the damper mounting structure described above, in a state where only a relatively small displacement occurs, for example, when the building receives a wind load, only the viscoelastic damper acts to Attenuation can be achieved. Also, for example, in a state where a large displacement occurs as in an earthquake, the friction damper acts after the displacement of the viscoelastic damper is regulated by the stopper, so that the building vibration due to the earthquake is attenuated. .
That is, according to the first conventional example, the viscoelastic damper and the friction damper do not act in parallel, and there is a problem that the effects of both dampers cannot be exhibited simultaneously.
Further, in order to solve this problem, if the stopper is not allowed to function, the relative perspective displacement between the structural members acts intensively on the viscoelastic damper that is easily deformed regardless of its size. Therefore, if the perspective displacement increases, there is a high risk that the viscoelastic damper will be destroyed without the friction damper being operated.
On the other hand, according to the second conventional example of the damper mounting structure described above, only the viscoelastic damper effect can be exhibited, and there is a problem that cannot be applied when the amount of displacement is large, such as an earthquake.

  Accordingly, an object of the present invention is to provide a damper mounting structure capable of solving the above-described problems and effectively operating a viscoelastic damper and a friction damper.

A first characteristic configuration of the present invention includes a damper main body in which a plurality of arm members are pivotally connected to each other, and both ends of the damper main body are pivotally connected to different structural members of a building, respectively. A viscoelastic damper which is mounted across members connected to each other among the structural members, and which suppresses relative displacement and relative rotation of the connecting pivot shafts of the members by a viscoelastic force; A friction damper, which is mounted over the members to be connected and suppresses relative rotation of the members by a frictional force, a pivot connection portion between the arm members, and a pivot between the damper main body and the structural member. of supporting connecting portions, Ri Oh provided separately each into at least two pivotally connected portions, wherein the viscoelastic damper and the friction damper, the two structural members each other phase With the movement, the viscoelastic damper is in the configuration and tare Rutokoro to operate earlier than the friction damper.

According to the first characteristic configuration of the present invention, the installation shape of the damper main body can be changed in the pivot connection part of the arm member and the pivot connection part with the structural member by the link mechanism of each pivot support part and the arm member. It can be made into a bent shape, and the perspective displacement of the different structural members due to the deformation of the building frame can be absorbed by the relative rotation (angular displacement) of the arm members at the pivot connection portion.
Further, the configuration of the viscoelastic damper installed in any of the pivot connection portions is a type in which the relative displacement in the radial direction of the connection pivot shaft between the members and the relative rotation are suppressed by viscoelastic force. Therefore, even when the link mechanism of the damper main body is not deformed, the radial relative displacement between the members can be suppressed by the viscoelastic damper. Therefore, for example, when the amount of displacement of the building is small, such as wind pressure, the radial relative displacement can be suppressed by the action of only the viscoelastic damper. On the other hand, when the amount of displacement of the building is large as in an earthquake, a damper effect in which a viscoelastic damper and a friction damper are simultaneously applied can be exhibited by accompanying the deformation of the link mechanism of the damper main body.
As a result, both dampers can be effectively operated.
On the other hand, since the viscoelastic damper operates through the amount of displacement of the building, the viscoelastic damper also operates when the friction damper starts to operate, and the viscoelastic damper can reduce the impact when the friction damper is activated. It is possible to improve the habitability of the building.
In addition, since the damper main body is constituted by a link mechanism, the damper main body is constructed as a straight line along the diagonal line of the building frame as in the first conventional example. It becomes easy to adopt a structure in which the damper main body is brought close to one side of the space, and it becomes possible to secure a wider frame space. Furthermore, since each arm member is pin-joined at both ends, a large bending force is difficult to act, and the cross section can be made smaller than that of the first conventional example. As a result, economic efficiency can be improved.

  According to a second characteristic configuration of the present invention, the friction damper is installed at a pivot joint where the relative angular displacement between the mounted members is maximized with relative movement between the two structural members. There is.

According to the second characteristic configuration of the present invention, the damper as a whole of the damper main body is arranged by disposing the friction damper that is easy to exert a stronger damper effect in the pivot connecting portion that maximizes the relative angular displacement. It is possible to expect the maximum effect.
Further, since the viscoelastic damper is configured to exhibit a damper action by the shear resistance of the viscoelastic body interposed between the arm members, the pivotal connection portion having a small relative angular displacement is provided. Arrangement can alleviate the action of shearing force exceeding the limit, making it difficult to break.

  According to a third characteristic configuration of the present invention, the damper main body includes two arm members, and a friction damper is installed at the pivot support connection portion of the intermediate portion, while the pivot connection of both end portions is provided. There is a viscoelastic damper in the part.

According to the third characteristic configuration of the present invention, since the link mechanism is constituted by the minimum number of two arm members, when the link mechanism is displaced along with the frame deformation of the building, any of the pivot connection portions In this case, the relative angular displacement is surely generated, and the intermediate friction damper and the viscoelastic dampers at both ends can be operated in parallel without waste.
Therefore, the damper effect can be exhibited economically with the minimum number of parts, and the damper effect can be more efficiently exhibited by one friction damper and two viscoelastic dampers.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.

  FIG. 1 shows a main part of a building B adopting the damper mounting structure of the present invention. The building B is configured by mounting a damper main body D on a frame 1 having columns 1A and beams 1B. . Although not shown in the drawing, the frame 1 is connected to the upper, lower, left, and right sides.

The frame 1 is composed of columns 1A standing upright and beams 1B provided over the adjacent columns 1A, and the damper is placed in a frame space V surrounded by the columns 1A and 1B. A main body D is installed.
A gusset plate (an example of a structural member) 2 for connecting the damper main body D is integrally formed at a joint portion between the column 1A and the beam 1B.
The gusset plate 2 is provided at a pair of corners facing each other on the diagonal line of the frame space V.

The damper main body D is configured so that the two arm members 3 are pivotally connected to each other so that the shape in front view becomes a “<” shape. Both end portions thereof are pivotally connected to the gusset plate 2 to constitute a link mechanism.
Therefore, when the building B rolls due to the action of wind pressure, seismic force, etc., and the frame 1 is deformed so as to become a parallelogram, the arm member 3 is connected to each pivot connecting portion. The deformation can be followed by the relative rotation of the members at 4.
In this embodiment, the viscoelastic dampers 5 are installed at the pivot connection portions 4A and 4C at both ends of the damper body D, while the friction damper 6 is disposed at the pivot connection portion 4B at the middle portion of the damper body D. Is installed.
Incidentally, of the two arm members 3, the arm member 3A located between the pivot support portions denoted by the symbols 4A and 4B is composed of two metal strips as shown in FIG. The arm member 3B located between the pivot support portions denoted by the symbols 4B and 4C is composed of a single metal strip.
Of the pair of gusset plates 2, the gusset plate 2 </ b> A provided with a pivot connection portion denoted by a symbol 4 </ b> A is composed of a single metal plate, and is pivotally coupled by a symbol 4 </ b> C. The gusset plate 2 </ b> B provided with a portion is composed of two metal plates.

Each of the pivot connecting portions 4 has a different relative angular displacement caused by the roll of the building B. In the case of a link mechanism made up of two arm members 3 as in the embodiment, FIG. As shown, the intermediate pivot connection 4B exhibits the greatest relative angular displacement.
In other words, the friction damper 6 installed in the intermediate pivot connecting portion 4B can exert a damper effect by a larger relative angular displacement than the viscoelastic damper 5 installed in the pivot connecting portions 4A and 4C at both ends. It is configured as follows. Further, the viscoelastic damper 6 is configured so that a large relative angular displacement exceeding the limit does not act.

As shown in FIGS. 1, 2, and 4, the viscoelastic damper 5 has a relative displacement in the radial direction and a relative rotation (angular displacement) of the connecting pivot shaft 7 between the gusset plate 2 and the arm member 3. Is suppressed by the viscoelastic deformation of the viscoelastic body 5 a interposed between the gusset plate 2 and the arm member 3.
Incidentally, the viscoelastic body 5a is made of, for example, rubber or other synthetic resin.
The viscoelastic damper 5 having such a performance can be an object to be adopted. As an example of a specific structure, as shown in FIG. 2, the gusset plate 2A (or the arm member 3B). Between the large-diameter through-hole H1 formed in the) and the connecting pivot shaft 7 inserted into the small-diameter through-hole H2 formed in the arm member 3A (or gusset plate 2B). The elastic body 5a can be interposed.
According to this structure, when the connecting pivot shaft 7 moves in the radial direction in the through hole H1 or rotates around the axis, the viscoelastic deformation of the viscoelastic body 5a causes the deformation thereof. It becomes possible to suppress movement.
Of course, the structure of the viscoelastic damper 5 is not limited to that described here.

The friction damper 6 is configured to suppress relative rotation (angular displacement) between members by a frictional force acting on a sliding contact surface between the two arm members 3A and the arm member 3B interposed therebetween. Yes.
As an example of a specific structure, as shown in FIG. 2, the connecting pivot shaft 8 made of a bolt is inserted into and screwed into a bolt insertion hole H3 formed in both arm members 3A and 3B. By tightening the nut 9, both the arm members 3 </ b> A and 3 </ b> B can be sandwiched, and a frictional force can be configured to act on the sliding contact surfaces of both.
According to this structure, when both the arm members 3A and 3B rotate relative to each other around the connecting pivot shaft 8, their movement can be suppressed by the frictional force.
Of course, the structure of the friction damper 6 is not limited to that described here.

According to the damper mounting structure of the present embodiment, for example, when a small roll is applied to the building by the action of wind, the damper action in the radial direction of the viscoelastic damper is caused before the bending deformation of the damper body occurs. (See FIG. 4A).
When the amount of displacement of the building is large, such as in an earthquake, it is possible to efficiently exhibit the damper effect in which the viscoelastic damper and the friction damper are simultaneously acted upon by the deformation of the link mechanism of the damper body ( (Refer FIG.4 (b)).
In addition, the action of the viscoelastic damper can alleviate the impact when the friction damper is operated, and can improve the habitability of the building.
And, by placing the friction damper that makes it possible to exert a stronger damper effect at the pivot joint where the relative rotation is maximized, the damper effect of the entire damper body can be expected to the maximum. It becomes.
Furthermore, since the viscoelastic damper is disposed at the pivotal support portion having a small relative rotation, it is possible to alleviate the action of the shearing force exceeding the limit and to make it difficult to break.

[Another embodiment]
Other embodiments will be described below.

<1> The damper main body is not limited to the one constituted by the two arm members 3 described in the previous embodiment. For example, the damper main body may be provided with three or more.
<2> The structures of the viscoelastic damper and the friction damper are not limited to those described in the previous embodiment, and other forms may be employed.
In addition, the number of viscoelastic dampers and friction dampers to be installed and the installation locations are not limited to those described in the previous embodiment. For example, viscoelastic dampers and friction dampers are provided one by one. There may be.
<3> The structural member is not limited to the gusset plates formed at the four corners of the frame described in the previous embodiment. For example, the structural member is a gusset plate formed at an intermediate portion of a beam or an intermediate portion of a column. May be. Moreover, if a damper main body can be attached, it will not be restricted to a gusset plate.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

Front view showing damper mounting structure Exploded perspective view showing damper mounting structure Schematic showing the deformation of the damper body Front view showing the deformation of the damper body Front view showing conventional damper mounting structure Front view showing conventional damper mounting structure

Explanation of symbols

2 Gusset plate (an example of a structural member)
3 Arm member 4 Pivot connection part 5 Viscoelastic damper 6 Friction damper 7 Connection pivot axis D Damper body

Claims (3)

With a damper body that pivotally connects a plurality of arm members to each other,
Both ends of the damper body are pivotally connected separately to different structural members of the building,
A viscoelastic damper that is mounted across members that are connected to each other among the damper main body and the structural member, and that suppresses relative displacement and relative rotation in the radial direction of the connecting pivot shaft between the members by viscoelastic force. When,
A friction damper that is mounted across the members connected to each other and suppresses relative rotation of the members by a frictional force;
Pivotal connection of the arm member with each other, and, among the pivotally connected portion between the structural member and the damper body, Ri Oh provided separately each into at least two pivotally connected portions,
The viscoelastic damper and the said friction damper, the with the relative movement of each other both structural members, the configuration and tear Ru damper mounting structure as viscoelastic damper is operated earlier than the friction damper.   2. The damper attachment according to claim 1, wherein the friction damper is installed at a pivot connecting portion in which relative angular displacement between the mounted members is maximized with relative movement of the two structural members. Construction.   The damper body is configured to include two arm members, and a friction damper is installed at the pivot connecting portion at the middle portion, while a viscoelastic damper is installed at the pivot connecting portions at both ends. The damper mounting structure according to claim 1 or 2.

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