JP2004169351A - Vibration proofing structure of soft nodal structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration proofing structure of a soft nodal structure capable of realizing a soft nodal earthquake proofing structure which has high damping characteristic against vibration to a structure of a soft nodal structure supporting a post-beam joint part of a post and a structure with a pin. <P>SOLUTION: The structure of the soft nodal structure in which the post 1 and the upper structure 2 are joined with the pin through a pin joint part 4, is composed of a projecting beam 5 fitted to the tip part of the post 1 and an umbrella type toggle mechanism 6 installed at tip parts on both sides of the projecting beam 5. The displacement amount of the tip part of the projecting beam 5 is amplified by the umbrella type toggle mechanism 6, and the amplified displacement amount is the stroke of a shock absorbing member 64, so that a high-damping soft nodal earthquake proofing structure can be realized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a soft damping structure, and more particularly to a soft damping structure having a column and a beam-to-column joint of a structure supported by pins.
[0002]
[Prior art]
Conventionally, a buffer means (for example, an oil damper) is installed between a pillar and a support structure (for example, a beam, a ceiling, a floor, a foundation, or the like) attached to the top and bottom of the pillar, and vibration applied to the structure is provided. Has been proposed to attenuate the pressure early by the buffering action of the buffering means.
[0003]
[Problems to be solved by the invention]
However, in the conventional technology, the structure to be damped is a rigid joint structure in which the column-to-column joint between the column and the upper structure is rigid, making repair, analysis, and relocation of the structure extremely difficult. Met. In addition, there is a problem that the safety of earthquake cannot be ensured in the soft-joint structure in which the beam-column joint is a pin structure.
[0004]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a high damping for a soft-joint structure having a column and a beam-to-column joint of a structure supported by pins. It is an object of the present invention to provide a vibration control structure having a soft section structure capable of realizing a soft section earthquake resistant structure.
[0005]
[Means for Solving the Problems]
The present invention has the following configurations in order to solve the above problems.
The gist of the invention according to claim 1 is a vibration-damping structure having a soft-joint structure in which a column-to-column joint between a column and an upper structure is supported by a pin, and an overhang provided at a tip portion of the column. A soft beam structure comprising: a beam; an amplification mechanism for amplifying a displacement of a tip end of the overhang beam with respect to the upper structure; and a buffer means for buffering the displacement amplified by the amplification mechanism. Exist in the damping structure.
The gist of the invention according to claim 2 is that the amplifying mechanism is an umbrella-type toggle mechanism attached to a tip end of the overhanging beam. Exists in the structure.
The gist of the invention according to claim 3 is that the umbrella-type toggle mechanism is configured such that one end is rotatably connected to the main arm having one end attached to the upper structure, and the other end of the main arm is rotatable. A pair of first sub-arms, one end of each of which is rotatably connected to each of the other rotating ends of the pair of first sub-arms, and the other end of which is rotatably connected to the tip of the overhanging beam. 3. The apparatus according to claim 2, comprising a pair of second sub-arms connected to each other, wherein said buffer means is interposed between two connecting portions of said first sub-arm and said second sub-arm. Exists in the soft-joint structure.
The gist of the invention according to claim 4 is that a first urging member interposed between the upper structure and a tip end of the overhang beam, the main arm and the pair of first sub-arms are provided. 4. A vibration control structure having a soft joint structure according to claim 3, further comprising a second urging member interposed between said connecting portion and a tip portion of said overhanging beam. .
The gist of the invention described in claim 5 is that the umbrella-type toggle mechanism includes a pair of first sub-arms each having one end rotatably attached to a tip end of the overhang beam, and a pair of first sub-arms. One end is rotatably connected to each of the other rotating ends, and a pair of second sub-arms are rotatably connected to the upper structure at the other end. 3. The vibration damping structure having a soft joint structure according to claim 2, wherein the vibration damping structure is interposed between two connecting portions of the sub arm and the second sub arm.
The gist of the invention according to claim 6 is to provide a first biasing member interposed between the upper structure and the tip of the overhanging beam. It is present in soft damping structures.
The gist of the invention described in claim 7 is that it comprises a second biasing member interposed between two connecting portions of the first sub-arm and the second sub-arm. 6. The vibration control structure having a soft joint structure according to 6.
The gist of the invention according to claim 8 is that the joint between the column and the lower structure is a pin joint, and the vibration suppression of the soft joint structure according to any one of claims 1 to 7, wherein Exists in the structure.
The gist of the invention according to claim 9 is that the damping means is an oil damper or an elasto-plastic damper, wherein the vibration damping structure having a soft joint structure according to any one of claims 1 to 8. Exists.
Further, the gist of the invention according to claim 10 is that the soft damping structure according to any one of claims 1 to 9 includes all the columns and the upper structure or the selected one of the structures. The structure is characterized in that it is provided on the pillar of the part and the upper structure.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0007]
FIG. 1 is a schematic front view showing an embodiment of a soft-joint structure vibration damping structure according to the present invention. FIG. 2 is a schematic front view showing an umbrella-type toggle mechanism shown in FIG. FIG. 4 is an explanatory diagram showing an analysis model of the embodiment of the soft-joint structure vibration damping structure according to the present invention. FIGS. 4 and 5 are diagrams for explaining the operation of the umbrella-type toggle mechanism shown in FIG. FIG.
[0008]
Referring to FIG. 1, the structure vibration damping device according to the present embodiment has a pillar 1 of a structure, an upper structure (beam) 2 to which the column 1 is attached, and a lower structure (lower beam or foundation). 3 is a vibration-damping device provided between the upper end of the column 1 and the upper end of the upper structure 2. , And an umbrella-type toggle mechanism 6 installed at each end of both sides of the overhanging beam 5. In addition, the pillar base of the pillar 1 (the joint between the pillar 1 and the lower structure 3) can also be applied by pin bonding.
[0009]
The overhanging beam 5 is fixed to the upper part of the column 1, that is, to the tip, and a pipe 51 penetrating vertically is fixed to both ends.
[0010]
Referring to FIG. 2, the umbrella-type toggle mechanism 6 has a main arm that is rotatably attached at one end to the upper structure 2, and penetrates a pipe 51 attached to a tip end of the overhanging beam 5. 61, a first sub-arm 62a and a first sub-arm 62b whose one end is rotatably connected to another rotation end of the main arm 61, and other rotation ends of the first sub-arm 62a and the first sub-arm 62b, respectively. , One end of which is rotatably connected to the pipe 51 and the other end of which is rotatably connected to the pipe 51, the first sub-arms 62a, b and the second sub-arm 63a, b, and a buffer member 64 interposed between the respective connecting portions, and a first biasing member 65 is interposed between the upper structure 2 and the pipe 51, It has a basic configuration in which a second urging member 66 is interposed between a connecting portion between the in-arm 61 and the first sub-arms 62a and 62b and the pipe 51, and is installed at both end portions of the overhang beam 5 respectively. Have been.
[0011]
Next, the main arm 61 is rotatably connected at one end thereof to a bracket 67 provided on the upper structure 2 via a pin 68.
[0012]
One end of the first sub-arm 62a and the first sub-arm 62b is rotatably connected to the rotating end of the main arm 61 via a pin 69.
[0013]
One end of each of the second sub-arm 63a and the second sub-arm 63b is rotatably connected to the other rotation end of the first sub-arm 62a and the first sub-arm 62b via a pin 70 and a pin 71, respectively. The other end is rotatably connected to the pipe 51 via a pin 72 and a pin 73, respectively.
[0014]
In the present embodiment, an oil damper is used for the buffer member 64, one end of which is rotatably connected to a pin 70 connecting the first sub-arm 62a and the second sub-arm 63a, and the other end of which is the It is rotatably connected to a pin 71 that connects the first sub-arm 62b and the second sub-arm 63b.
The cushioning member 64 can be formed of an elastic-plastic member such as a coil spring instead of the oil damper, or can be formed of a viscoelastic body such as high-damping rubber.
[0015]
According to such a configuration, the connecting portion between the first sub-arm 62a and the second sub-arm 63a and the first sub-arm in accordance with the displacement of the relative position of the tip (the pipe 51) of the overhanging beam 5 with respect to the upper structure 2. The distance between 62b and the connecting portion of the second sub arm 63b is displaced. As shown in FIG. 3, the amount of displacement of the relative position of the tip end (pipe 51) of the overhanging beam 5 with respect to the upper structure 2 which is displaced in accordance with the amount of displacement of the upper structure 2 due to vibration is, as shown in FIG. The first sub-arm 62a which is determined by the length h and the overhang length AM of the overhang beam 5 and is displaced in accordance with the amount of displacement of the relative position of the tip end (pipe 51) of the overhang beam 5 with respect to the upper structure 2. The distance between the first sub arm 62a and the connecting portion of the second sub arm 63a, and the first sub arm 62b and the connecting portion of the second sub arm 63b are determined by the difference in length between the first sub arm 62a, b and the second sub arm 63a, b. Accordingly, the toggle magnification of the umbrella-shaped toggle mechanism 6 with respect to the displacement amount of the upper structure 2 due to vibration is the extension length AM of the extension beam 5, the length of the first sub-arms 62a and 62b, and the length of the second sub-arm 63a, It can be set by the length of b.
[0016]
Here, when vibration is applied to the structure, for example, the upper structure 2 moves in the direction indicated by the arrow x in FIG. 3 and the column 1 is tilted in the direction indicated by the arrow x in FIG. 3 is relatively moved so that the tip end (pipe 51) of the overhanging beam 5 located on the right side of FIG. 3 is separated from the upper structure 2, and the overhanging beam 5 of the column 1 located on the left side of FIG. The distal end (pipe 51) is relatively moved so as to approach the upper structure 2.
[0017]
Referring to FIG. 4, the umbrella-type toggle mechanism 6 attached to the side of the overhanging beam 5 where the tip (pipe 51) of the overhanging beam 5 is relatively moved away from the upper structure 2 has a structure similar to that of the overhanging beam 5. Since the distal end (pipe 51) is displaced downward, the distance between the connection between the first sub-arm 62a and the second sub-arm 63a and the connection between the first sub-arm 62b and the second sub-arm 63b is reduced. The umbrella-type toggle mechanism 6 attached to the side of the overhanging beam 5 that has been relatively moved so that the tip (pipe 51) of the overhanging beam approaches the upper structure 2, as shown in FIG. Of the first sub-arm 62a and the second sub-arm 63a, and the distance between the connection between the first sub-arm 62b and the second sub-arm 63b is increased. The displacement of the distance between the connecting portion of the first sub-arm 62a and the second sub-arm 63a and the connecting portion of the first sub-arm 62b and the second sub-arm 63b with respect to the displacement of the tip (the pipe 51) of the overhang beam 5 is The first sub-arm 62a and the second sub-arm 63a and the toggle mechanism constituted by the first sub-arm 62b and the second sub-arm 63b amplify, and the amount of the amplified displacement becomes the operation amount of the buffer member 64.
[0018]
As described above, when the above-described external force is applied to the cushioning members 64, the cushioning members 64 are expanded and contracted to generate a cushioning function, and the cushioning function is provided by the pillar 1 and the upper structure 2. The vibration energy of the object is absorbed.
In addition, since the operation amount of the buffer member 64 is amplified with respect to the displacement amount of the column 1, the energy absorbing action is amplified, and the vibration of the structure is suppressed.
[0019]
The movement of the tip of the overhanging beam 5 is (AM / h) x, as shown in FIG. 3, and if the single deformation magnification of the umbrella-type toggle mechanism 6 is β, the buffer member 64 against the interlayer deformation x Is (AM / h) β · x. Therefore, if (AM / h) β is designed to be large, the amount of operation of the buffer member 64 can be increased, and the energy absorbing action is amplified.
[0020]
The various shapes, dimensions, and the like of the constituent members shown in the present embodiment are merely examples, and can be variously changed based on design requirements and the like.
[0021]
FIG. 6 is a schematic front view showing another embodiment of the soft damping structure according to the present invention.
For example, the umbrella-type toggle mechanism shown in FIG. 9 includes a first sub-arm 62a and a first sub-arm 62b whose one end is rotatably connected to a distal end of the overhanging beam 5, a first sub-arm 62a and a first sub-arm. A second sub-arm 63a and a second sub-arm 63b, one end of which is rotatably connected to each of the other rotating ends of 62b, and the other end of which is rotatably connected to the upper structure 2; A cushioning member 64 interposed between the respective connecting portions of the sub-arms 62a and 62b and the second sub-arms 63a and 63b; The biasing member 65 is interposed, and the displacement of the distance between the tip of the overhanging beam 5 and the upper structure 2 is determined by the first sub-arm 62a, the second sub-arm 63a, and the first sub-arm 62b. Amplified by constituted toggle mechanism by the second sub-arm 63 b, the minute the amplified displacement, the operation amount of the cushioning member 64. In addition, a second urging member (not shown) may be interposed between the respective connecting portions of the first sub-arms 62a and 62b and the second sub-arms 63a and 63b together with the buffer member 64.
[0022]
As described above, according to the present embodiment, the tip of the column 1 is extended to the soft-joint structure in which the column-beam joint between the column 1 and the upper structure 2 is supported by the pin. By providing the beam 5 and providing an umbrella-type toggle mechanism 6 at the tip of the overhanging beam 5 so that the amplified displacement is buffered by the buffering member 64, a soft damping seismic structure with high damping is provided. By applying the present invention to a large building, a factory building, or the like, an effect of greatly contributing to the improvement of seismic performance can be obtained.
[0023]
It should be noted that the present invention is not limited to the above embodiments, and it is clear that each embodiment can be appropriately modified within the scope of the technical idea of the present invention. Further, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to numbers, positions, shapes, and the like suitable for carrying out the present invention. In the drawings, the same components are denoted by the same reference numerals.
[0024]
【The invention's effect】
The soft-joint structure of the present invention is provided with a projecting beam at the tip of the column, with respect to the soft-joint structure in which the column-beam joint between the column and the upper structure is supported by pins. By providing an umbrella-type toggle mechanism at the tip of the overhanging beam and using a buffer member to buffer the amplified displacement, a soft damping seismic structure with high damping can be realized. When applied to a building, a factory building, or the like, there is an effect that it can greatly contribute to improvement of seismic performance.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an embodiment of a soft damping structure according to the present invention.
FIG. 2 is a schematic front view showing the umbrella-type toggle mechanism shown in FIG.
FIG. 3 is an explanatory diagram showing an analysis model of the embodiment of the soft damping structure according to the present invention.
FIG. 4 is an explanatory diagram for explaining the operation of the umbrella-type toggle mechanism shown in FIG. 1;
FIG. 5 is an explanatory diagram for explaining an operation of the umbrella-type toggle mechanism shown in FIG. 1;
FIG. 6 is a schematic front view showing another embodiment of the soft damping structure according to the present invention.
[Explanation of symbols]
1 pillar 2 upper structure (beam)
3 lower structure (lower beam or foundation)
4 Pin Joint 5 Extension Beam 51 Pipe 6 Umbrella Toggle Mechanism 61 Main Arm 62a First Sub Arm 62b First Sub Arm 63a Second Sub Arm 63b Second Sub Arm 64 Buffer Member 65 First Biasing Member 66 Second Biasing Member 67 Bracket 68, 69, 70, 71, 72, 73 pin

Claims (10)

A soft-joint structure with a column-beam joint between a column and an upper structure supported by a pin,
An overhanging beam provided at the tip of the column,
An amplification mechanism that amplifies a displacement of the tip of the overhang beam with respect to the upper structure,
And a buffer means for buffering the displacement amplified by the amplification mechanism. The vibration control structure according to claim 1, wherein the amplification mechanism is an umbrella-type toggle mechanism attached to a tip end of the overhang beam. The umbrella-type toggle mechanism, a main arm having one end attached to the upper structure,
A pair of first sub-arms having one end rotatably connected to another rotation end of the main arm;
A pair of second sub-arms, one end of which is rotatably connected to each of the other rotating ends of the pair of first sub-arms, and the other end of which is rotatably connected to the tip of the overhanging beam; Consisting of
3. The vibration control structure according to claim 2, wherein the buffering means is interposed between two connecting portions of the first sub-arm and the second sub-arm. A first biasing member interposed between the upper structure and a tip end of the overhang beam;
4. The vehicle according to claim 3, further comprising a second urging member interposed between a connecting portion between the main arm and the pair of first sub-arms and a tip end of the overhang beam. 5. Soft control structure with soft joint structure. The umbrella-type toggle mechanism includes a pair of first sub-arms having one end rotatably attached to a tip end of the overhang beam,
A pair of second sub-arms, one end of each of which is rotatably connected to each of the other rotating ends of the pair of first sub-arms, and the other end of which is rotatably connected to the upper structure;
3. The vibration control structure according to claim 2, wherein the buffering means is interposed between two connecting portions of the first sub-arm and the second sub-arm. The vibration control structure according to claim 5, further comprising a first biasing member interposed between the upper structure and a tip end of the overhang beam. 7. The vibration control structure according to claim 5, further comprising a second biasing member interposed between two connecting portions of the first sub-arm and the second sub-arm. . The soft joint structure according to any one of claims 1 to 7, wherein a joint between the column and the lower structure is a pin joint. The soft damping structure according to any one of claims 1 to 8, wherein the buffer means is an oil damper or an elasto-plastic damper. The vibration-damping structure having a soft joint structure according to any one of claims 1 to 9 is provided on all columns and the upper structure of the structure, or on some selected columns and the upper structure. A structure characterized by being.

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