JPH0649923A - Viscoelastic damper - Google Patents

Abstract

PURPOSE:To damp vibration at optional positions without affecting the structural strength of a building. CONSTITUTION:A clearance 10 is provided between a lower steel pipe 7 and an upper steel pipe 9 and a damping member 11 made of a viscoelastic material is charged in the clearance 10 so as to connect steel pipes 7, 9 to each other to constitute a viscoelastic damper 6. The viscoelastic damper is pin-jointed to the upper and lower floors 3, 3 adjacent to the structure 1 through axial pins 51, 51. The vibratory energy generated between the upper and lower steel pipes 7, 9 is absorbed by the viscoelastic deformation of the damping member 11 to attenuate the vibration and hence, the shaking of the floor can be effectively prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscoelastic damper suitable for suppressing floor vibration of a steel frame building.

[0002]

2. Description of the Related Art Conventionally, various types of vibration control devices have been proposed in order to suppress shaking generated in a building due to an earthquake or wind.
Many of these vibration control devices prevent the structural part of the building from shaking due to an earthquake or wind, and do not work very effectively against the vertical shaking that occurs on the floor or the like inside the building. Met. Therefore, if the vertical vibration generated on the floor or the like inside the building can be absorbed by the viscosity of the viscoelastic damper used in the known vibration damping device,
A very high damping structure will be added to the building, and various methods have been taken into consideration.

[0003]

However, when such a viscoelastic damper is to be incorporated into the structure side of a building, the structural calculation of the incorporated portion must be performed separately in accordance with it. , Very complicated. Therefore, installing a viscoelastic damper in the structure side in a form that corresponds to the mechanical equipment or device installed on the floor inside the building or the purpose of use, etc. requires precise structure calculation and accompanying design modification. Since it was required, there was an inconvenience that many disadvantages were caused in the construction in exchange for its damping effect, and it was avoided. Therefore, in view of the above circumstances, the present invention provides a viscoelastic damper that can be incorporated at any position without affecting the structural strength of a building.

[0004]

That is, the present invention has rods (9), (29) and (39), said rods (9),
(29), (39) tubular support (7),
(27) and (37) are replaced with the rods (9), (29) and (3
The outer circumferences (9b), (29b) and (39b) of 9) are provided so as to surround the outer circumferences (9b), (29b) and (39b) of the rods (9), (29) and (39), and Inner circumferences (7a), (27) of the supports (7), (27), (37)
a), (37a) and the energy absorption region (10),
(30) and (40) are formed, and an energy absorber (11) made of a viscoelastic member is provided in the energy absorbing regions (10), (30) and (40), and the rods (9), (29) and
(39) and the supports (7), (27), (37) are connected to each other, and the viscoelastic dampers (6), (26),
(36) is constructed. The numbers in parentheses are for convenience and indicate the corresponding elements in the drawings.
Therefore, the present description is not limited to the description on the drawings. The same applies to the column of "action" below.

[0005]

With the above-mentioned structure, the present invention provides a rod (9),
(29), (39) and supports (7), (27), (3
The vibration generated between the energy absorption region (1) and the energy absorption region (1
0), (30), (40) at the energy absorber (1
The viscoelastic deformation of 1) acts to attenuate the vibration energy by absorbing it.

[0006]

1 is a side view showing an example of a structure, FIG. 2 is a sectional side view showing an example of a viscoelastic damper according to the present invention, FIG. 3 is a view taken in the direction of arrow III in FIG. 2, and FIG. 2 is a view showing another embodiment of the viscoelastic damper shown in FIG. 2, FIG. 5 is a view showing still another embodiment of the viscoelastic damper shown in FIG. 2, and Chemical formula 1 is used for the damping material of the viscoelastic damper according to the present invention. A chemical formula showing an example of the polysulfide-modified epoxy resin, a chemical formula 2 showing an example of the polysulfide skeleton in the polysulfide-modified epoxy resin shown in the chemical formula 1, and a chemical formula 3 showing a mercaptan group at the terminal used for the damping material of the viscoelastic damper according to the present invention. 3 is a chemical formula showing an example of a polysulfide compound having:

As shown in FIG. 1, the structure 1 has columns 2 made of steel-framed concrete which are erected at predetermined intervals, and the columns 2 are connected between the columns 2. Floor 3
It is provided by being developed in the horizontal direction while being supported by a slab (not shown). Figure 1 Floors 3 and 3 adjacent to each other in the vertical direction
In between, intermediate supports 5 for preventing the flexure of each floor 3 are provided upright at predetermined intervals in a direction intersecting the plane of FIG. 1, and the intermediate supports 5 have upper and lower end portions in FIG. , 51
Bottom surface 3 of the floors 3 and 3 adjacent to each other in the vertical direction in FIG.
b and the upper surface 3a, the viscoelastic damper 6 is pivotally supported.

As shown in FIG. 2 or 3, the viscoelastic damper 6 has a lower steel pipe 7 formed in a tubular shape having a predetermined inner diameter D1. The lower steel pipe 7 has the lower steel pipe 7 inside. 7
The upper steel pipe 9 formed to have an outer diameter smaller than the inner diameter D1 of
The left end of FIG. 2 which is the upper end of the steel pipe 9 is arranged so as to project from the upper end of the lower steel pipe 7, that is, the left end of FIG. 2 by a length L1, that is, the lower steel pipe 7 is an outer peripheral surface 9b of the upper steel pipe 9. It is shaped to surround the. A gap 10 is formed between the lower steel pipe 7 and the upper steel pipe 9 in an annular shape having a width L1 between the inner peripheral surface 7a of the steel pipe 7 and the damper outer peripheral surface 9b of the steel pipe 9. The damping material 11 made of a viscoelastic member is filled and disposed in the gap 10 so as to connect the lower steel pipe 7 and the upper steel pipe 9. The lower steel pipe 7 and the upper steel pipe 9 are connected to the steel pipes 7 and 9 via joint pipes 12 and 13, respectively, one 7 on the lower floor 3 in FIG. 1 and the other 9 on FIG.
The viscoelastic damper 6 is connected and attached to the upper floor 3,
2 shows the axial direction of the steel pipes 9 and 7 shown in FIG.
The steel pipes 9 and 7 above and below the joint pipes 12 and 13 and the shaft pin 5 are oriented in the directions of the arrows C and D which are the vertical directions.
The intermediate support 5 is configured so as to be pin-connected to the floors 3 and 3 of the structure 1 via 1 and 51, respectively.

By the way, the damping material 11 is made of a modified epoxy resin, and the damping material 11 contains a predetermined amount of the polysulfide-modified epoxy resin 15 shown in Chemical formulas 1 and 2. In addition, the damping material 11 includes
The polysulfide compound 16 having a mercaptan group at the terminal shown in Chemical formula 3 is contained in a predetermined amount, and the vibration damping material 11 further contains amines 17 in a predetermined amount. The damping material 11 is obtained by filling the gap 10 between the lower steel pipe 7 and the upper steel pipe 9 with the above-mentioned modified epoxy resin in a liquefied state by pouring it, and then leaving this at room temperature or heating at low temperature. Width T1 due to plastic hardening
It is formed by molding into a ring shape.

Since the structure 1, the viscoelastic damper 6 and the like have the above-mentioned structure, the floor 3 is slab and the like in a normal state, that is, in a state where it is considered that the structure 1 is not vibrating. The weight of the floor 3 is strongly supported by the structure 1 while being supported by the columns 2 via the. Therefore, the intermediate support 5
Is disposed between floors 3 and 3 vertically adjacent to each other in the structure 1 without bearing and supporting a static load due to the weight of the floor 3. When vibration is generated on the floor 3 of the structure 1, relative vibration is generated between the floors 3 and 3 vertically adjacent to each other in FIG. 1 in the directions of arrows C and D. Between the floors 3 and 3, the viscoelastic damper 6 that constitutes the intermediate support 5 and the upper and lower steel pipes 9 and 7 are joint pipes 12 and 13.
And the floor 3 above and below via the shaft pins 51, 51, respectively.
Since it is provided in a pin-connected form with respect to 3, the vertical force due to the vibration acts on each of these steel pipes 9 and 7 from above and below, and between the upper and lower steel pipes 9 and 7. Relative vibration occurs in the directions of arrows C and D. Then, in the gap 10 between the upper and lower steel pipes 9 and 7, the damping material 11 made of a viscoelastic member is filled and arranged so as to connect the steel pipes 9 and 7, so that the damping material 11 is In the gap 10, the viscoelastic deformation absorbs the vibration energy to quickly damp the vibration, thereby minimizing the shaking of the floor 3.

Thus, when the viscoelastic damper 6 absorbs vibration energy by viscoelastic deformation of the vibration damping material 11, the vibration damping material 11 has the polysulfide-modified epoxy resin 15 shown in Chemical formulas 1 and 2 and the chemical formula 3 shown in Chemical formulas 3. Since the polysulfide compound 16 having a mercaptan group at the terminal and the amines 17 are each composed of a modified epoxy resin in a predetermined amount, it is possible to suppress the vibration generated on the floor 3 with an optimum damping property. I can. That is, the damping material 11
At room temperature, that is, at a temperature of 10 to 30 ° C., a frequency of 0.1 to
It has been actually measured that a damping characteristic of tan δ ≧ 0.8 is exhibited with respect to a vibration of 1.0 Hz, whereby the damping material 11 can quickly damp the vibration generated between the steel pipes 7 and 9 of the viscoelastic damper 6. Can be done. Further, in the viscoelastic damper 6, the upper and lower steel pipes 9 and 7 are joint pipes 12 and 13 and the shaft pin 5.
The floors 3 and 3 are pivotally supported by being connected to the upper and lower floors 3 and 3 via pins 1 and 51, respectively.
At the time of vibration, only a vertical load acts on the viscoelastic damper 6 and no bending moment is generated in the intermediate support 5 formed by the damper 6, so that a plurality of them are arranged in the direction intersecting the plane of FIG. The intermediate support 5 can properly prevent the floor 3 from flexing, and therefore, even when the floor 3 is a large span floor, the intermediate portion does not flex and a large swing occurs here. Further, the intermediate support 5 is the structure 1
If the viscoelastic damper 6 is not adapted to the vibration of the floor 3, the structure can be arbitrarily modified and changed. In this way, when the vibration damping structure of the floor 3 by the viscoelastic damper 6 is modified and changed, the damping material 11 is filled with a modified epoxy resin in a liquefied state in a predetermined space, and then this is filled. Since it can be easily molded into an arbitrary shape by leaving it at room temperature or heating at a low temperature to plastically harden it, for example, the length L2 or width T of the gap 10
If this is done in the form of adjusting 1, it is possible to provide the structure 1 with the most suitable vibration damping structure according to the structure of the floor 3 and the equipment, devices and the like incidental thereto. In addition, damping material 1
No. 1 does not separate from the outer peripheral surface 9b and the inner peripheral surface 7a of the upper and lower steel pipes 9 and 7 due to vibrations of the upper and lower steel pipes 9 and 7 or fatigue deterioration due to the excellent adhesiveness and durability of the modified epoxy resin described above. , Always viscoelastically deformed in good condition,
It is possible to properly absorb vibration over a long period of time.

In the above-mentioned embodiment, the viscoelastic damper 6 is pin-connected to the floors 3 and 3 via the shaft pins 51 and 51 to form the intermediate support 5. As shown in FIG. 4, the support 5 has a pipe body 27 which can be connected to the lower floor 3 and a pipe body 29 which can be connected to the upper floor 3 and is fitted between the inner peripheral surface 27a and the outer peripheral surface 29b. Damping material 1 made of a viscoelastic member in a gap 30 having a length L2 '
1 may be configured by a viscoelastic damper 26 in which both 27 and 29 are connected to each other, whereby the viscoelastic damper is installed between the floors 3 and 3 of the structure 1. Is extremely easy. Furthermore, the viscoelastic damper is
As shown in FIG. 5, the pipes 37, 37 formed in a pair so as to be respectively connected to the upper and lower floors 3, 3 are opposed to each other with their ends 37a, 37a forming a predetermined space L3. A pipe 39 is fitted in the pipes 37, 37 such that the pipes 37, 37 are connected to each other, and are arranged between the inner peripheral faces 37a, 37a and the outer peripheral faces 39b, 39b. The gaps 40, 40 may be filled with the damping materials 11, 11 made of a viscoelastic member so as to connect the pipes 37, 39. The thus configured viscoelastic damper 36 shown in FIG. 5 is not limited to simply absorbing and damping the vibration generated in the axial direction of the tubular bodies 37 and 39 shown in the left-right direction of FIG. 5, and the force in the twisting direction is applied to the damper 36. The vibration damping effect can be expressed even for the vibration that can act,
That is, this makes it possible to more effectively use the vibration damping property of the damping material 11. In addition, the viscoelastic dampers 6, 2
Upper steel pipe 9, which constitutes a viscoelastic damper such as 6, 36,
The outer peripheral surfaces 9b, 29b, 39b of the tubular bodies 29, 39, etc.
Lower steel pipe 7, tubular body 2 formed into a tubular body so as to surround
7, 37 and the like, and the gaps 10 and 3 that can be filled with the damping material 11.
Since it suffices to be configured so that they can be connected with 0 and 40, it is not necessarily required to be made of steel pipe. Similarly, the lower steel pipe 7, the pipes 27, 37, etc. may be formed in a tubular shape, and the shapes and lengths of these members supporting the vibration damping material 11 of the viscoelastic damper, as well as their shapes. The manner of connection to the structure 1 is arbitrary, and of course, the structure may be divided.

[0013]

As described above, according to the present invention, the lower steel pipe 7, the pipes 27, 37, etc., which have the rods such as the upper steel pipe 9, the pipes 29, 39, and are formed in a tubular shape on the rods, are provided. Is provided so as to surround the outer circumferences of the rod, such as the outer peripheral surfaces 9b, 29b, 39b, and the like, and between the outer circumference of the rod and the inner circumferences of the support, such as the inner peripheral surfaces 7a, 27a, 37a. Gap 10, 3
Energy absorbing regions such as 0, 40, etc. are formed, and an energy absorbing body such as a vibration damping material 11 made of a viscoelastic member is provided in the energy absorbing region so as to connect the rod and the support to each other. Since the viscoelastic dampers 6, 26, 36, etc. are configured, the vibration generated between the rod and the support is attenuated in the energy absorption region by viscoelastic deformation of the energy absorber to absorb the vibration energy. You can Therefore, if the viscoelastic damper is installed in a building such as the structure 1 so that the support and the rod are connected to different portions such as the floors 3 and 3, the vibration generated between the different portions can be generated. It can be effectively suppressed by making it independent of the structure. The vibration-damping effect of the viscoelastic damper exhibits the same excellent effect even if it is used in any structure, but especially as an intermediate support for a large span floor of a steel building.
If the viscoelastic damper according to the present invention is used to suppress the floor vibration, it is possible to effectively suppress the flexure of the floor by incorporating an arbitrary number of viscoelastic dampers at arbitrary positions without affecting the structural strength of the building. Therefore, it is possible to obtain a very effective damping effect. Further, the viscoelastic damper according to the present invention is not limited to being used by being installed and arranged at the time of building a building, but is also built in a building already constructed and in service when a vibration obstacle appears. By disposing and suppressing the vibration, it is possible to effectively eliminate such obstacles, and therefore it is also possible to repair the building to a vibration damping environment suitable for installation of precision machinery and the like. Also,
The energy absorber comprises a polysulfide-modified epoxy resin 15, a polysulfide compound 16 having a mercaptan group at the terminal, and an amine 17, and when the viscoelastic damper is configured, the energy absorber is at room temperature, At a temperature of 10 to 30 ° C, frequency 0.1 to
A damping characteristic of tan δ ≧ 0.8 can be exhibited for 1.0 Hz vibration. Therefore, it is possible to suppress the vibration particularly generated on the floor of the structure with the optimum damping property. In the liquefied state, the energy absorber can be placed in the viscoelastic damper in such a manner that the energy absorber filled in the energy absorbing space is left at room temperature or heated at a low temperature to be plastically solidified. This makes it possible to adapt the viscoelastic damper to various kinds of vibrations, or to install the viscoelastic damper in a more arbitrary position in the building. In addition, the energy absorber described above,
Since excellent adhesion can be maintained over a long period of time, it peels off from the inner and outer peripheral surfaces of the support and the rod, which are relatively displaced by the vibration generated between different parts of the building, or fatigue. The vibration-damping effect can be continuously exhibited for a long time in a form that is repeatedly viscoelastically deformed in a good state without deterioration. This facilitates maintenance and management of the viscoelastic damper incorporated in the building, and thus makes the damper suitable for application in a permanent structure.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a floor support structure for a structure.

FIG. 2 is a sectional side view showing an embodiment of a viscoelastic damper according to the present invention.

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a diagram showing another embodiment of the viscoelastic damper shown in FIG.

5 is a view showing still another embodiment of the viscoelastic damper shown in FIG.

[Chemical 1] 3 is a chemical formula showing an example of a polysulfide-modified epoxy resin used for the vibration damping material of the viscoelastic damper according to the present invention.

[Chemical 2] 2 is a chemical formula showing an example of a polysulfide skeleton in the polysulfide-modified epoxy resin shown in Chemical formula 1.

[Chemical 3] 3 is a chemical formula showing an example of a polysulfide compound having a mercaptan group at a terminal used for the vibration damping material of the viscoelastic damper according to the present invention.

[Explanation of symbols]

 6, 26, 36 ... Viscoelastic damper 7 ... Support (lower steel pipe) 27, 37 ... Support (tubular) 7a, 27a, 37a ... Inner circumference (inner peripheral surface) 9 ... Rod (upper) Steel pipe) 29, 39 ... Rod body (tubular body) 9b, 29b, 39b ... Outer circumference (outer peripheral surface) 10, 30, 40 ... Energy absorbing space (gap) 11 ... Energy absorbing body (damping material)

[Procedure amendment]

[Submission date] October 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

Thus, when the viscoelastic damper 6 absorbs vibration energy by viscoelastic deformation of the vibration damping material 11, the vibration damping material 11 has the polysulfide-modified epoxy resin 15 shown in Chemical formulas 1 and 2 and the chemical formula 3 shown in Chemical formulas 3. Since the polysulfide compound 16 having a mercaptan group at the terminal and the amines 17 are each composed of a modified epoxy resin in a predetermined amount, it is possible to suppress the vibration generated on the floor 3 with an optimum damping property. I can. That is, the damping material 11
Is tan δ ≧ 0.8 at a normal temperature, that is, at a temperature of 10 to 30 ° C. for vibrations of a frequency of 0.1 to 10.0 Hz.
It has been actually measured that the damping characteristics of (1) are exhibited, whereby the damping material 11 can quickly damp the vibration generated between the steel pipes 7 and 9 of the viscoelastic damper 6. Further, in the viscoelastic damper 6, the upper and lower steel pipes 9 and 7 are joint pipes 1.
When the floor 3 vibrates, it is perpendicular to the viscoelastic damper 6 because it is pivotally supported by the upper and lower floors 3 and 3 which are pin-connected to the upper and lower floors 3 and 3, respectively. A bending moment does not occur in the intermediate support 5 formed by the damper 6 in the form that only the load acts, so that the intermediate supports 5 arranged in the direction intersecting the plane of FIG. Therefore, even when the floor 3 is a large span floor, the middle portion of the floor does not bend and a large swing does not occur here. Further, since the intermediate support 5 is not a structural material of the structure 1, if the viscoelastic damper 6 is not adapted to the vibration of the floor 3, its configuration can be arbitrarily modified and changed. By the way,
When the vibration damping structure of the floor 3 by the viscoelastic damper 6 is modified and changed, the damping material 11 is filled with a modified epoxy resin in a liquefied state into a predetermined space and then left at room temperature or Since it can be easily molded into an arbitrary shape by heating at a low temperature to plastically harden it, for example, if this is performed by adjusting the length L2 or the width T1 of the gap 10, the structure of the floor 3 and the incidental parts thereof can be obtained. It is possible to provide the structure 1 with the most suitable vibration damping structure according to the equipment, devices, etc. In addition, the vibration damping material 11 is made up of the upper and lower steel pipes 9 and 7 due to the excellent adhesiveness and durability of the modified epoxy resin described above.
The outer peripheral surface 9b and the inner peripheral surface 7a of the both of them are not peeled off or fatigue-deteriorated against the above vibration, and they are repeatedly viscoelastically deformed in a good condition and absorb the vibration properly for a long time. Can be done.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

As described above, according to the present invention, the lower steel pipe 7, the pipes 27, 37, etc., which have the rods such as the upper steel pipe 9, the pipes 29, 39, and are formed in a tubular shape on the rods, are provided. Is provided so as to surround the outer circumferences of the rod, such as the outer peripheral surfaces 9b, 29b, 39b, and the like, and between the outer circumference of the rod and the inner circumferences of the support, such as the inner peripheral surfaces 7a, 27a, 37a. Gap 10, 3
Energy absorbing regions such as 0, 40, etc. are formed, and an energy absorbing body such as a vibration damping material 11 made of a viscoelastic member is provided in the energy absorbing region so as to connect the rod and the support to each other. Since viscoelastic dampers such as 6, 26, and 36 are configured, the vibration generated between the rod and the support is attenuated in the energy absorbing region by viscoelastic deformation of the energy absorber to absorb the vibration energy. You can Therefore, if the viscoelastic damper is installed in a building such as the structure 1 so that the support and the rod are connected to different portions such as the floors 3 and 3, the vibration generated between the different portions can be generated. It can be effectively suppressed by making it independent of the structure. The vibration-damping effect of the viscoelastic damper exhibits the same excellent effect even if it is used in any structure, but especially as an intermediate support for a large span floor of a steel building.
If the viscoelastic damper according to the present invention is used to suppress the floor vibration, it is possible to effectively suppress the flexure of the floor by incorporating an arbitrary number of viscoelastic dampers at arbitrary positions without affecting the structural strength of the building. Therefore, it is possible to obtain a very effective damping effect. Further, the viscoelastic damper according to the present invention is not limited to being used by being installed and arranged at the time of building a building, but is also built in a building already constructed and in service when a vibration obstacle appears. By disposing and suppressing the vibration, it is possible to effectively eliminate such obstacles, and therefore it is also possible to repair the building to a vibration damping environment suitable for installation of precision machinery and the like. Also,
The energy absorber comprises a polysulfide-modified epoxy resin 15, a polysulfide compound 16 having a mercaptan group at the terminal, and an amine 17, and when the viscoelastic damper is configured, the energy absorber is at room temperature, At a temperature of 10 to 30 ° C., frequency 0
It is possible to exhibit a damping characteristic of tan δ ≧ 0.8 with respect to vibration of 1 to 10.0 Hz. Therefore, it is possible to suppress the vibration particularly generated on the floor of the structure with the optimum damping property. In the liquefied state, the energy absorber can be placed in the viscoelastic damper in such a manner that the energy absorber filled in the energy absorbing space is left at room temperature or heated at a low temperature to be plastically solidified. This makes it possible to adapt the viscoelastic damper to various kinds of vibrations, or to install the viscoelastic damper in a more arbitrary position in the building. Further, since the above-mentioned energy absorber can maintain excellent adhesiveness for a long period of time, the inner peripheral surfaces of the support and the rod, which are relatively displaced by the vibration generated between the different parts of the building. Thus, the vibration damping effect can be continuously exhibited for a long time in the form of repeated viscoelastic deformation in a good state without peeling from the outer peripheral surface or fatigue deterioration. This facilitates maintenance and management of the viscoelastic damper incorporated in the building, and thus makes the damper suitable for application in a permanent structure.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location F16L 15/02 J 7123-3J (72) Inventor Masahisa Handa 518 Komagaki, Nagareyama City, Chiba Prefecture Mitsui (72) Inventor Katsuhiko Katsuhata 2-3 Chisenkaigan, Ichihara-shi, Chiba Torayachiol Co., Ltd. Chiba Plant (72) Inventor Hiroyoshi Kuramoto 2-3 Chisenkaigan, Ichihara-shi, Chiba Toray Chicole Co., Ltd. Chiba factory

Claims (2)

[Claims] 1. A rod-shaped support body, which has a rod body and is formed in a tubular shape on the rod body, is provided so as to surround the outer periphery of the rod body, and energy is absorbed between the outer periphery of the rod body and the inner periphery of the support body. A viscoelastic damper in which a region is formed and an energy absorber made of a viscoelastic member is provided in the energy absorption region in a form of connecting the rod and the support. 2. The viscoelastic damper according to claim 1, wherein the energy absorber contains a polysulfide-modified epoxy resin, a polysulfide compound having a mercaptan group at a terminal, and amines.