JP4432208B2 - Damper and building using it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a damper, and more particularly, to a damper that is interposed between two structures and is suitable for damping vibrations of another structure with respect to one structure and a building using the same.
[0002]
[Problems to be solved by the invention]
For example, buildings such as commercial buildings, office buildings, apartment buildings, and bridges that are flexible for earthquake resistance are easily deflected by wind pressure or weak earthquake motion, and the ceiling is lower than the lower structures on the floor side. The upper structure on the side may vibrate (oscillate) in the horizontal direction, and this may continue for a long time. In order to prevent such vibrations from occurring in wind pressure or weak earthquakes, and to dampen the vibrations early, including those caused by strong earthquakes, for example, damping walls are used. Is a container in which a viscous material is contained and a damper comprising a container fixed to the floor and the like, and a resistance plate whose most part is immersed in the viscous material in the container and whose upper part is fixed to the ceiling or the like is installed in the wall. The viscous body is sheared by the movement of the resistance plate with respect to the container based on the movement of the ceiling side with respect to the horizontal floor side due to wind or earthquake, and vibration is not generated or reduced by the viscous shear resistance in this shearing. Moreover, it is known that when vibration occurs, the vibration energy is absorbed and attenuated at an early stage.
[0003]
In the damping wall using such a damper, since the prevention or reduction and damping of the vibration depend on the viscosity of the viscous body, it is difficult to obtain the desired reduction and damping of the vibration when the viscosity is low. However, when the viscosity is increased, it becomes difficult to fill the container with the viscous material, and a long filling time is required.
[0004]
In the above damper, since most of the resistance plate is simply immersed in the viscous body in the container, the origin for returning the floor-side lower structure and the ceiling-side upper structure to their original positions. If the viscosity of the viscous material is extremely high, the position of the lower structure on the floor side and the upper structure on the ceiling side may deviate after the vibration is settled. is there.
[0005]
The problem as described above also occurs in a damper that is interposed between two structures and is used to damp vibrations of the other structure with respect to one structure.
[0006]
The present invention has been made in view of the above-described points, and the object of the present invention is to act like a rigid body when vibration is weak and to prevent the other structure from vibrating with respect to one structure. A damper that operates to move back and forth with respect to one structure after absorbing the vibrational energy and absorbs the vibrational energy when the vibration exceeds a certain level. An object of the present invention is to provide a suitable damper that is used to reduce vibration transmitted between one structure and the other structure interposed between two structures, and to dampen it at an early stage.
[0007]
Another object of the present invention is that it can act like a rigid body in wind pressure or weak seismic motion, etc., so that the upper part does not vibrate with respect to the lower part of the building, and it expands and contracts in seismic motion over a certain level. A damper that absorbs vibration energy and operates to return the upper part to its original position after absorbing the vibration energy, in particular, interposed between the upper and lower parts of the building to reduce the relative vibration of the upper part with respect to the lower part Another object of the present invention is to provide a damper and a building using the damper that are suitable for early damping.
[0008]
[Means for Solving the Problems]
The damper according to the present invention includes a cylinder body, a piston disposed in the cylinder body so as to define the cylinder body in two chambers, and an orifice communicating with the two chambers, and one end portion of which is a piston. A large-diameter piston rod that protrudes out of the cylinder body through one end of the cylinder body and one end is connected to the piston and penetrates the other end of the cylinder body to the outside of the cylinder body A small-diameter piston rod projecting into the cylinder, and a compressible pressurized fluid filled in two chambers of the cylinder body.
[0009]
According to such a damper, the large-diameter piston rod is provided with the large-diameter piston rod and the small-diameter piston rod, and the pressurized fluid is filled in the two chambers of the cylinder body defined by the piston. As long as an extension force greater than the force based on the area difference between the piston rod and the small-diameter piston rod and the pressure of the pressurized fluid is not applied from the outside, it behaves like a rigid body and can thus hold the structure firmly, and the extension force beyond that When added from the outside, the kinetic energy from the outside can be absorbed as quickly as possible by the pressurized fluid through the orifice, and the motion of the structure can be damped.
[0010]
In addition, according to the damper of the present invention, the force based on the area difference between the large-diameter piston rod and the small-diameter piston rod and the pressure of the pressurized fluid, that is, its own pulling force is applied to the structure. Thus, a so-called origin return function for returning the structure after movement to the original position can be obtained.
[0011]
In a preferred example, the damper is for a building and is configured to be interposed between an upper portion of the building and a lower portion of the building that is movable in a horizontal direction relative to the upper portion. In this case, the other end of the small-diameter piston rod and one of the cylinder main bodies are placed on the upper part of the building via the diagonal member, and the other end of the small-diameter piston rod and the cylinder main body is the other of the building. The other end of the small-diameter piston rod and one of the cylinder bodies are connected to the upper part of the building, and the other end of the small-diameter piston rod and the cylinder main body The other may be configured to be respectively connected to the lower part of the building via diagonal materials.
[0012]
If the damper is used for a building, the upper part of the building in which such a damper is used does not roll due to wind pressure, and therefore does not give the residents unpleasant rolling due to the wind, and against the lower part. In earthquakes where the upper part is oscillated horizontally and the damper is expanded or contracted, the vibration can be damped as quickly as possible by the pressurized fluid through the orifice. It can be returned to the position.
[0013]
In a damper for a building, the upper part may be an upper part of a pillar or a horizontal member on the ceiling side, the lower part may be a horizontal member on the floor, the upper part may be a horizontal member on the ceiling side, and the lower part may be a lower part of the pillar or It may be a floor transverse member.
[0014]
The damper is preferably used for a damping wall of a building, but is not limited thereto, and may be used for other parts of the building. Further, the damper may be a machine tool or other vibration. It may be for the resulting machine.
[0015]
The compressive pressurized fluid is preferably made of a silicon-based liquid, but is not limited thereto, and may be other fluids.
[0016]
The building of the present invention includes an upper part, a lower part movable in a horizontal direction relative to the upper part, and the damper interposed between the upper part and the lower part.
[0017]
According to such a building of the present invention, the upper part does not vibrate relatively horizontally with respect to the lower part due to wind pressure or weak ground motion, etc., and the relative horizontal vibration of the upper part with respect to the lower part due to seismic motions exceeding a certain level. Is reduced early, and after vibration, the upper part is returned to its original position relative to the lower part.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention and its embodiments will be described in more detail with reference to the drawings. The present invention is not limited to these embodiments.
[0019]
In FIG. 1, the damper 5 of this example is arranged in the cylinder body 31 so as to define the cylinder body 31 and the cylinder body 31 in the two chambers 32 and 33, and communicates the two chambers 32 and 33. A piston 35 having at least one orifice 34, one end 36 connected to the piston 35, a large-diameter piston rod 38 penetrating the one end 37 of the cylinder body 31 and projecting outside the cylinder body 31; The one end 39 is connected to the piston 35, passes through the other end 40 of the cylinder body 31, protrudes outside the cylinder body 31, and has a piston rod 41 smaller in diameter than the piston rod 38, and the cylinder body. Compressed fluid 42 having compressibility such as silicon oil filled in the two chambers 32 and 33 of 31 and the other end 51 of the piston rod 41 are fixed. Connecting a member 52, comprises a connecting member 53 secured to the cylinder body 31, a Z direction telescopically deformed is the extending direction of the piston rod 38 and 41.
[0020]
In the damper 5 described above, when a tensile external force in the Z direction is not applied to the connecting member 52 or 53, in other words, when an external force that pulls the connecting member 52 and the connecting member 53 apart from each other in the Z direction is not applied. Is reduced to the minimum possible in the Z direction by its own force toward the one end 37 applied to the piston 35 due to the difference in pressure receiving area in the two chambers 32 and 33, that is, its own pulling force in the Z direction. When the external force that tries to separate the connecting member 52 and the connecting member 53 from each other with respect to the Z direction is greater than its own force toward the one end 37 applied to the piston 35 due to the difference in the pressure receiving area in the two chambers 32 and 33, The member 52 and the connecting member 53 are separated from each other with respect to the Z direction, and the damper 5 is extended with respect to the Z direction. On the other hand, after extension, the connecting member 52 and the connecting member 53 are separated from each other with respect to the Z direction. When the external force to be reduced becomes smaller than its own pulling force, the damper 5 contracts in the Z direction. In this expansion and contraction, the damper 5 attenuates the kinetic energy applied to the damper 5 as quickly as possible by the movement of the pressurized fluid 42 between the chamber 32 and the chamber 33 via the orifice 34.
[0021]
The damper 5 behaves like a rigid body unless an extension force greater than the force based on the area difference between the large-diameter piston rod 38 and the small-diameter piston rod 41 and the pressure of the pressurized fluid 42 is applied from the outside. When the structure attached to the connecting member 52 can be firmly held and a further extension force is applied from the outside, the kinetic energy of the structure is absorbed as quickly as possible by the pressurized fluid 42 through the orifice 34. Thus, the motion of the structure can be attenuated. In addition, according to the damper 5, a force based on the area difference between the large-diameter piston rod 38 and the small-diameter piston rod 41 and the pressure of the pressurized fluid 42, that is, its own pulling force is applied to the structure. In addition, the moved structure can be returned to the original position.
[0022]
An example in which the damping wall 2 is configured by installing a plurality of the dampers 5 on the wall of the building 1 shown in FIG. 2 will be described. Since the building 1 of this example consists of a multi-story floor, the damping wall 2 of the lower floor 3 and the damping wall 2 of the upper floor 4 are comprised similarly, Therefore Hereinafter, the lower floor 3 is demonstrated.
[0023]
Two dampers 5 are used in one damping wall 2 of the lower floor 3, and one damper 5 is a building in which the other end portion 51 of the small-diameter piston rod 41 is connected via the connecting member 52 and the diagonal member 6. A cylinder main body 31 is rotatably connected to a horizontal member 8 of a floor as a lower part of the building 1 via a connecting member 53 on an upper part of a pillar 7 as an upper part of 1. The other end portion 51 of the small-diameter piston rod 41 is connected to the upper portion of the column 10 adjacent to the column 7 as the upper portion of the building 1 via the connecting member 52 and the diagonal member 9. Each of the lateral members 8 is rotatably connected.
[0024]
The diagonal member 6 made of steel is connected to the upper part of the column 7 via the shaft 11 at one end and to the connecting member 52 of one damper 5 via the shaft 12 at the other end so as to be rotatable within the wall surface. The diagonal member 9 made of steel is rotated within the wall surface at one end portion thereof on the upper portion of the column 10 via the shaft 13 and at the other end portion thereof on the connecting member 52 of the other damper 5 via the shaft 14. The connecting members 53 of the dampers 5 are connected to the transverse members 8 via the shafts 15 so as to be rotatable within the wall surfaces.
[0025]
In the building 1 described above, the diagonal members 6 and 9 are normally pulled by the reducing force in the Z direction of each damper 5 due to the difference in pressure receiving areas in the two chambers 32 and 33. Even if some horizontal force is applied to the building 1 due to wind or the like, or both horizontal force is applied to the building 1 due to a small earthquake or the like, both dampers due to the difference in pressure receiving area in the two chambers 32 and 33 The transverse member 16 on the ceiling side does not vibrate relatively in the horizontal direction H with respect to the transverse member 8 by the balanced tensile force of 5.
[0026]
In the building 1, when a large horizontal force is applied to the transverse member 16 relative to the transverse member 8 due to seismic motion or the like, and the transverse member 16 vibrates in the horizontal direction H relative to the transverse member 8, The dampers 5 are alternately expanded and contracted in the Z direction, and in the expansion and contraction of the dampers 5, the movement of the pressurized fluid 42 between the chambers 32 and 33 through the orifice 34 causes the lateral member 16 to move relative to the lateral member 8. The vibration in the horizontal direction H is attenuated as quickly as possible. When the horizontal member 16 is no longer applied with the horizontal force H due to the earthquake, the horizontal member 16 is returned to the original position with respect to the horizontal member 8 by the balanced tensile force of the two dampers 5.
[0027]
In FIG. 2, one end of each of the diagonal members 6 and 9 may be connected to the horizontal member 16 via the shafts 11 and 13, and the connecting member 53 of both dampers 5 may be connected to the horizontal member 16 via the shaft 15. While connecting to the member 16, one end of each of the diagonal members 6 and 9 may be connected to the lower part of the columns 7 and 10 or the lateral member 8. Further, the connecting member 53 of each damper 5 is connected to the shafts 12 and 14. The connecting members 52 of the dampers 5 may be connected to the other ends of the diagonal members 6 and 9 via the shafts 12 and 14 to the horizontal members 8 or 16 or the upper or lower portions of the pillars 7 and 10 via the shafts 12 and 14, In addition, the shafts 11 to 15 may be replaced with spherical joints so that the shafts 11 to 15 can operate even in vibrations in a direction perpendicular to the paper surface of FIG.
[0028]
【The invention's effect】
According to the present invention, when the force applied by wind pressure or earthquake motion is weak, the other structure such as the lower part of the building acts on one structure such as the upper part of the building by acting like a rigid body. A damper that operates to return the other structure to its original position with respect to one structure after absorbing the vibration energy while absorbing and absorbing vibration energy when the vibration exceeds a certain level, Particularly, a damper that is interposed between two structures to reduce vibrations transmitted from one structure to the other structure and to attenuate it at an early stage, and a construction using this damper Things can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a preferred example of one embodiment of the present invention.
FIG. 2 is a cross-sectional view of an example in which the example shown in FIG. 1 is applied to a building.
[Explanation of symbols]
5 Damper 31 Cylinder body 32, 33 Chamber 34 Orifice 35 Piston 38 Large diameter piston rod 41 Small diameter piston rod 42 Pressurized fluid

Claims (7)

  A cylinder body, a piston having an orifice communicating with the two chambers, and one end connected to the piston so as to define the cylinder body in two chambers. A large-diameter piston rod that protrudes outside the cylinder body through one end of the main body, and one end that is connected to the piston and protrudes outside the cylinder main body through the other end of the cylinder body A damper for a structure such as a building having a piston rod having a smaller diameter than a large-diameter piston rod and a compressible pressurized fluid made of a silicon-based liquid filled in the two chambers of the cylinder body. The other end of the small-diameter piston rod and one of the cylinder bodies are on one structure such as the upper part of the building, and the other end of the small-diameter piston rod and the other cylinder body are on the other side. It is connected to the other structure such as the lower part of the building and is interposed between one structure such as the upper part of the building and the other structure such as the lower part of the building. The vibration of the other structure is weak, and an extension force greater than the force based on the area difference between the large diameter piston rod and the small diameter piston rod and the pressure of the pressurized fluid is applied to the other end of the small diameter piston rod and the cylinder body. If it is not received between one of the other ends of the small-diameter piston rod and the other cylinder body, it acts like a rigid body and vibrates the other structure relative to one structure. On the other hand, when the vibration of one structure with respect to one structure exceeds a certain level, the extension force exceeding the force based on the area difference between the large diameter piston rod and the small diameter piston rod and the pressure of the pressurized fluid is reduced. The other end of the piston rod and When it is received between one of the cylinder bodies and the other end of the small-diameter piston rod and the other of the cylinder bodies, the structure of the other structure is deformed by expansion and contraction and the flow of pressurized fluid through the orifice. A damper configured to absorb vibration energy and return the other structure to the original position with respect to one structure after the vibration energy is absorbed.   It is for a building and is interposed between the upper part of the building which is one structure and the lower part of the building which is the other structure movable in a horizontal direction relative to the upper part. The damper of Claim 1 comprised by these.   One of the other end of the small-diameter piston rod and the cylinder body is connected to the upper part of the building via an oblique member, and the other end of the small-diameter piston rod and the cylinder body is connected to the lower part of the building. The damper of Claim 2 comprised so that it may be carried out.   One of the other end of the small-diameter piston rod and the cylinder body is at the top of the building, and the other end of the small-diameter piston rod and the other of the cylinder body is at the bottom of the building through the diagonal. The damper according to claim 2, wherein the damper is configured to be coupled to each other.   The damper according to any one of claims 2 to 4, wherein the upper part of the building is an upper part of the pillar or a horizontal member on the ceiling side, and the lower part of the building is a lower part of the pillar or a horizontal member on the floor.   The damper according to any one of claims 1 to 5, which is used for a damping wall of a building.   A building comprising the damper according to any one of claims 1 to 6.

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