JP3941028B2 - Damping damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damper that is installed in a frame of a building frame and reduces vibration response during the earthquake of the frame.
[0002]
[Prior art]
At present, this type of damping damper is broadly divided into steel dampers that use the yield of extremely mild steel and viscous dampers that use the viscous resistance associated with shear deformation of viscous and viscoelastic bodies. A steel-based damper that exhibits great damping performance at low cost is a brace type that resists axial force. However, in the brace type, it is necessary to prevent the buckling of the steel material against the compressive force, and the following structures (1) and (2) have been put into practical use as a countermeasure. In the following, the core material refers to a core steel frame portion that absorbs hysteresis energy by yielding.
[0003]
(1) A structure that prevents adhesion of the core material from buckling by cutting the adhesion around the core material that constitutes the damper part and winding concrete.
(2) A structure in which the steel pipe is covered so as to be almost in contact with the core material, thereby stiffening the core material and preventing buckling.
[0004]
[Problems to be solved by the invention]
However, the structures {circle around (1)} and {circle around (2)} have the following problems.
First, in the structure of (1), it is necessary to ensure a certain covering dimension or more in order to exert a predetermined rigidity by the concrete, thereby increasing the external dimensions and weight, and improving the installation property inside the building. Not only is there a problem in terms of points, but there is also a concern that the space utilization inside the building will be impaired.
[0005]
Further, in the structure (2), there is a problem that the core material is locally buckled inside the steel pipe at the time of an earthquake and is complicatedly deformed, so that a stable hysteresis characteristic of the damper cannot be expected.
[0006]
In view of such circumstances, it is an object of the present invention to provide a damping damper that is excellent in terms of installation properties and space availability and that can exhibit stable damping performance.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following means.
That is, the damping damper according to claim 1 is a damping damper that is installed in a structural surface of a building frame to reduce a vibration response at the time of the earthquake of the frame, as compared with the frame. It is formed of a material having a low degree of yield stress, and includes a core member having one end bonded to a part of the frame and the other end bonded to the other part of the frame. central portion, Rutotomoni is inserted into the interior of the comparison to the yield stress of the material having a large cylindrical stiffener formed by the core material, a fixed stiffening rib on an end portion of the core, the A stiffener is provided by being inserted into a notch at the end of the stiffener , a pressing member is interposed between the stiffener and the core, and at least a constant region of the central portion of the core is It is characterized in that it is pressed evenly from the stiffener side through a pressing material. By that.
[0008]
With such a configuration, a certain region in the central portion of the core material is uniformly suppressed from local buckling, and thereby stable hysteresis characteristics of the damper can be expected without causing buckling of the core material. .
[0009]
The damping damper according to claim 2 is the damping damper according to claim 1,
The core material is characterized by being formed of a steel frame made of ultra-soft steel.
[0010]
With such a configuration, it is possible to realize a vibration control damper having stable hysteresis characteristics at a low cost.
[0011]
The damping damper according to claim 3 is the damping damper according to claim 2,
The core material is characterized in that a cross-sectional area of the central portion is smaller than that of other portions.
[0012]
With such a configuration, in this vibration damping damper, plastic deformation can be intensively generated in the central portion of the core member having a small cross-sectional area.
[0013]
The damping damper according to claim 4 is the damping damper according to any one of claims 1 to 3,
The stiffening body is formed by integrating a steel plate and a channel.
[0014]
With this configuration, the stiffener can be easily assembled from a low-cost material.
[0015]
The damping damper according to claim 5 is the damping damper according to any one of claims 1 to 4,
The pressing material is formed of rubber.
[0016]
With such a configuration, the damping damper can be configured to be lightweight. In addition, rubber has high adhesion strength and compressive rigidity to steel and the like, but since shear rigidity is small, deformation of the core material other than in the axial direction can be prevented without using a release agent.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
What is shown in FIG. 2 is the external appearance of the damping dampers 3 and 3 installed in the construction surface 2 of the building frame 1. As shown in the figure, the damping dampers 3 and 3 are installed in a substantially C shape as a pair of braces in the opening 6 surrounded by the columns 4 and 4 and the beams 5 and 5 constituting the frame 1. Has been.
[0018]
The vibration damping damper 3 includes a core member 7 and a cylindrical stiffening body 8 provided so as to surround the central portion 7a of the core member 7. The core material 7 is made of ultra-soft steel, and the yield stress level is smaller than those of the columns 4 and 4 and the beams 5 and 5 formed of ordinary steel frames. The core member 7 has one end 7b provided at substantially the center of the upper edge of the opening 6 and fixed to the lower surface of the upper beam 5, while the other end 7c is The high-strength bolts are respectively connected to the gusset plates 10 arranged at the lower corners of the opening 6 and fixed to the pillar 4 and the lower beam 5.
[0019]
1 is a cross-sectional view taken along the line II in FIG. 2, and shows a cross section of the central portion 3 a of the vibration damper 3. As shown in the figure, the stiffening body 8 is formed by joining flanges 12a, 12a of two channels 12, 12 with cover plates (steel plates) 13, 13 and screw bolts 14,. A space 15 is formed. These channels 12, 12 and the threaded bolts 14,... Are made of a steel material having a higher yield stress level than the core material 7.
[0020]
A central portion 7a of the core material 7 is inserted into the closed space 15, and rubber packing (pressing materials) 16 and 16 are formed in a plate shape between the stiffening body 8 and the central portion 7a of the core material 7. It arrange | positions so that both surfaces of the formed core material 7 may be contact | connected. The rubber packing 16 has a length dimension substantially the same as the length dimension of the central portion 7 a of the core material 7, and the central portion 7 a of the core material 7 is provided with a stiffening body via the rubber packing 16. It is pressed evenly from the 8 side in the material length direction (direction orthogonal to the paper surface).
[0021]
FIG. 3 is a view showing a II-II cross section in FIG. 1. As shown in the figure, the core member 7 has a smaller width dimension of the central portion 7a than the end portion 7b (7c).
[0022]
FIG. 4 is a view showing a cross section taken along the line III-III in FIG. As shown in the drawing, stiffening ribs 17 and 17 are fixed to the end portion 7 b (7 c) of the core material 7 so as to be orthogonal to the core material 7. Further, notches 18 for inserting the stiffening ribs 17 and 17 are provided at the end portions 12 b and 12 b of the channels 12 and 12 constituting the stiffening body 8.
[0023]
In order to obtain such a structure, the rubber packings 16 and 16 are applied to both surfaces of the central portion 7a of the core member 7, the channels 12 and 12 are pressed from the outside, and the flanges 12a and 12a of the channels 12 and 12 are connected to each other. Are joined together by the cover plate 13 and the screw bolts 14... To form the stiffening body 8 around the core member 7 in advance in a factory or the like. And what was manufactured in this way is carried in to the field, and while the edge parts 7b and 7c of the core material 7 are joined with the gusset plates 9 and 10 previously provided in the frame 1, it is a stiffening rib. By reinforcing with 17, 17, the structure as shown in FIG. 2 is obtained.
[0024]
In the above-described vibration damper 3, when vibration is applied to the frame 1 during an earthquake, the core material 7 having a lower yield stress than the columns 4 and 4 and the beams 5 and 5 constituting the frame 1 is provided. It yields prior to the frame 1 and the core material 7 is plastically deformed, so that the vibration energy of the frame 1 is absorbed and the vibration response of the frame 1 is attenuated. In this case, the central portion 7a of the core member 7 has a smaller cross-sectional area because the width dimension is smaller than that of the other portion, and the stress level is greater than that of the other portion. Will occur. Accordingly, the plastic deformation of the core material 7 occurs intensively in the central portion 7a. At this time, the central portion 7a is uniformly pressed by the stiffening body 8 from both sides via the rubber packings 16,16. Therefore, local buckling is suppressed and stable hysteresis characteristics of the damper can be exhibited.
[0025]
As described above, in the damping damper 3, the stiffening body 8 is provided so as to surround the central portion 7 a of the core material 7 that is plastically deformed and absorbs the vibration energy of the frame 1 at the time of the earthquake. Since the central portion 7a is pressed evenly in the material length direction through the rubber packing 16, the core material is complicatedly deformed in the steel pipe when compared with a conventional damper in which the core material is stiffened by a steel pipe. Thus, local buckling of the core material 7 can be effectively prevented. Furthermore, this damping damper 3 has a smaller outer diameter than the conventional unbonded brace damper, which has a predetermined covering dimension on the core and is covered with concrete, and is housed in the inner wall or shaft. In this case, it is possible to reduce the dead size and effectively use the space. In addition, since the stiffening body 8 is only put on the core member 7 and does not need to be joined, assembly work is easy, and the delivery time of the product can be shortened and the cost can be reduced. As a result, it is possible to realize a damper excellent in terms of installation property and cost while ensuring stable vibration control performance.
[0026]
Moreover, in the damping damper 3, since the core material 7 is formed of ultra-soft steel, a damping damper having stable hysteresis characteristics can be realized at low cost, and the cost can be reduced. Moreover, it can be made maintenance-free basically.
[0027]
Furthermore, in the damping damper 3, since the cross-sectional area of the central portion 7a of the core member 7 is smaller than that of the other portions, only the central portion 7a is distorted and the yield displacement is reduced. In addition, the yield range can be limited, and the plastic strain can be concentrated in this range to effectively exhibit the damping effect.
[0028]
Further, in the vibration damping damper 3, the stiffening body 8 is made of a low-cost material such as the channel 12 or the cover plate 13, so that the cost can be reduced. Further, in this case, since the stiffener 8 can be assembled only by bolt joining, a high level of assembly work accuracy is not required, and therefore, even a non-skilled worker can easily and speedy manufacture.
[0029]
Furthermore, in the damping damper 3, since the rubber packing 16 is utilized, weight reduction can be achieved compared with the damper using the conventional concrete type material. For this reason, handling is easy and it is excellent in installation property. Further, the rubber packing 16 has adhesion strength to the steel material and compression rigidity in the thickness direction, but since the shear rigidity is small, it does not hinder the deformation of the core material without special work such as a release agent. Can prevent buckling. As a result, it is possible to facilitate the manufacture of the vibration damper.
[0030]
Furthermore, this damping damper 3 has the same external appearance as that of a brace found in a general steel structure, and has no special restrictions on the structural plan and architectural plan. It can be incorporated into the building for design work. In addition, the seismic damper 3 can be used in place of the conventional brace when performing seismic reinforcement of an existing building, so that the existing building can be easily reinforced by the seismic control structure.
[0031]
Further, when installing the vibration damper 3, as described above, the core material 7, the rubber packing 16 and the stiffener 8 can be integrally manufactured at the factory and transported to the site. No damper assembly work is required, and the process is no different from the normal steel structure. Moreover, there is no demerit at all in terms of construction and provisional time as compared with the case where the central member in the ordinary brace structure is attached.
[0032]
Furthermore, since this seismic damper 3 does not cause an earthquake and a fire at the same time, a fireproof coating can be made unnecessary unless a long-term load is applied.
[0033]
In addition, by incorporating such a damping damper 3 in the frame 1, it is possible to reduce the response of the frame 1 during an earthquake, and to reduce the member cross section compared to a normal steel structure, thereby reducing costs. Can contribute.
[0034]
Further, in this vibration damper 3, the core material 7 is a simple flat plate, and there is only a slight processing such as fillet welding of the stiffening rib 18 at the end or drilling for inserting a high-strength bolt. Therefore, quality control is easy, and manufacturing is possible at low cost.
[0035]
As described above, according to the vibration damper 3, it is possible to easily construct a vibration control structure having a large seismic energy absorption efficiency in the same manner as a steel brace that is frequently used in a conventional steel structure. As a result, it can be easily applied to buildings having various forms, and an effective seismic control structure is possible in terms of cost, construction period, and the like.
[0036]
In the above embodiment, other configurations may be adopted without departing from the spirit of the present invention.
For example, in the above-described embodiment, the damping damper 3 is installed in a substantially C shape in the opening 6, but instead of this, the installation shape of the damping damper 3 is a closed type or K type. Also, it may be an eccentric K type or an eccentric type, and these can be appropriately selected according to a building plan such as an opening in a plan plan.
[0037]
Moreover, in the said embodiment, although the center part 7a was set as the structure with a small width dimension, you may make it make it the same cross section over the whole length instead of this.
Moreover, in the said embodiment, although the edge parts 7b and 7c of the core material 7 were high-strength bolt joining with respect to the gusset plates 9 and 10, it may be made to use a clevis instead of this. Good. As a result, it is possible to realize a vibration control device that is mechanically clear without causing bending stress in the vibration control damper 3 and also has a good design appearance.
[0038]
Further, the rubber packing 16 does not necessarily have to be integrated over the entire length of the central portion 7a of the core member 7, and can cover a predetermined range by being divided and arranged in the material length direction or the width direction. That's fine. Moreover, the rubber packing 16 does not necessarily have to be installed over the entire surface of the core member 7, and there may be a range in which it is not partially installed.
[0039]
Furthermore, instead of the rubber packing 16, a material that can withstand compression of a stainless steel plate, a Teflon plate, lead, or the like and that causes slipping with respect to the steel material may be used.
[0040]
In addition to this, other configurations may be adopted within a range not departing from the gist of the present invention, and the above-described modifications may be selectively used as appropriate.
[0041]
【The invention's effect】
As described above, the damping damper according to claim 1 is provided with a stiffening body so as to surround at least the central portion of the core material that is plastically deformed and absorbs the vibration energy of the frame during an earthquake, and the core material is provided from the stiffening body. Since the core material is pressed evenly through the pressing material, the core material does not undergo complex deformation in the steel pipe when compared to a conventional damper in which the core material is stiffened by a steel pipe. The local buckling can be effectively prevented. Furthermore, this damping damper can reduce the outer diameter compared to conventional unbonded brace dampers that have a specific covering dimension on the core and are covered with concrete. It is possible to suppress the dead dimension of the space and to effectively use the space. In addition, this damping damper only needs to cover the core with a stiffening body, and since there is no need for joining, assembly work can be facilitated, shortening the delivery time and cost of the product. it can. As described above, it is possible to realize a damper excellent in terms of installation property and cost while ensuring stable seismic control performance.
[0042]
According to the second aspect of the present invention, since the core material is made of ultra-soft steel, it is possible to realize a vibration-damping damper having stable hysteresis characteristics at a low cost and to reduce the cost. Moreover, it can be made maintenance-free basically.
[0043]
Since the cross-sectional area of the center part of the core material is made small compared with other parts, the vibration damping damper according to claim 3 can reduce the yield displacement and limit the yield range. The plastic strain can be concentrated in this range, and the damping effect can be exhibited efficiently.
[0044]
The seismic damper according to the fourth aspect can reduce the cost because the stiffening body is formed of a low-cost material such as a channel or a steel plate. Further, in this case, since the stiffening body can be assembled only by bolt joining, a high degree of assembly work accuracy is not required, and therefore, even a non-skilled worker can easily and speedy manufacture.
[0045]
Since the seismic damper according to claim 5 is formed of rubber, the pressing member can be reduced in weight as compared with a damper using a conventional concrete material. For this reason, handling is easy and it is excellent in installation property. In addition, rubber has adhesion strength with steel and compressive rigidity in the thickness direction, but has low shear rigidity. Therefore, by using rubber as a pressing material, there is no need for special work such as a release agent. The buckling can be prevented without inhibiting the deformation of the core material. As a result, it is possible to facilitate the manufacture of the vibration damper.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a central portion of a vibration damping damper schematically showing an embodiment of the present invention.
FIG. 2 is a front view showing a situation when the vibration damper shown in FIG. 1 is installed in a frame.
3 is a cross-sectional view taken along line II-II in FIG.
4 is a cross-sectional view taken along the line III-III in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Structure 3 Damping damper 7 Core material 7a Center part 7b, 7c End part 8 Stiffening body 12 Channel 13 Cover plate (steel plate)
16 Rubber packing (pressing material)

Claims (5)

A damping damper for reducing vibration response during the earthquake of the frame installed in the frame of the building frame,
It is formed of a material having a low yield stress compared to the frame, and includes a core member having one end bonded to a part of the frame and the other end bonded to the other part of the frame.
The core material, at least the central portion, is inserted inside the cylindrical stiffener formed by material having a high yield stress level as compared to the core material Rutotomoni is fixed to an end of said core member The stiffening rib is inserted through the notch at the end of the stiffening body,
Between the stiffening body and the core material, a pressing material is interposed,
The damping damper according to claim 1, wherein at least a fixed region of the central portion of the core member is pressed evenly from the stiffening body side through the pressing member. A damping damper according to claim 1,
The damping material according to claim 1, wherein the core material is formed of a steel frame made of extremely mild steel. A damping damper according to claim 2,
The core material has a cross-sectional area of the central portion that is smaller than that of other portions. A damping damper according to any one of claims 1 to 3,
The seismic damper is characterized in that the stiffening body is formed by integrating a steel plate and a channel. A damping damper according to any one of claims 1 to 4,
The said damping material is formed with rubber | gum, The damping damper characterized by the above-mentioned.

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