JP2001227082A - Solid-borne sound isolation method of columnar member and existing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To isolate the solid-borne sound propagating to a structural skeleton from a vibration source including traffics such as the railway and the road traffic, and facility appliances by a solid-borne sound isolation method of a columnar member having a simple structure and an existing structure. SOLUTION: In the columnar member 1 formed of a reinforced concrete, the concrete 11 at a lower end of the columnar member and the concrete 12 at an upper end of the columnar member are isolated from each other, a buffer material 14 is interposed between the concrete 11 at the lower end of the columnar member and the concrete 12 at the upper end of the columnar member, and the concrete 11 at the lower end of the columnar member and the concrete 12 at the upper end of the columnar member are connected to each other by a reinforcing member 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of isolating solid noise from a column member and an existing structure, and more particularly, from a vibration source such as a transportation system such as a railroad or a road traffic and equipment to a structural body. The present invention relates to a column member suitable for blocking a propagating solid sound and a solid sound blocking method for an existing structure.

[0002]

2. Description of the Related Art Solid sound is a phenomenon in which vibrations generated inside and outside a structure by means of transportation or equipment are transmitted through the structure body.
This is noise generated by shaking floor slabs, walls, and the like.
In particular, in condominiums and office buildings, the grade of indoor application is determined according to the noise level, which affects the use of the building and the selling price.

On the other hand, a seismic isolation method using a laminated rubber isolator or the like has been put to practical use in order to reduce seismic force acting on a structure. This is mainly developed for the purpose of mitigating seismic motion in a frequency range of 10 Hz or less, but can also cut off some vertical vibration at a frequency of around 60 Hz, which causes solid noise.

[0004]

However, since the above seismic isolation method is expensive, it is applied only to a specific structure. Many buildings are built along railroads and arterial roads because of good location conditions, and it is desired that such buildings in general cut off solid-state noise at a lower cost.

[0005] The problem to be solved by the present invention is to provide a columnar member having a simple structure and a solid sound isolation method for an existing structure.
The purpose is to cut off solid-state sound that propagates from a vibration source such as a transportation system such as a railroad or a road traffic and equipment to a structural body.

[0006]

Means for Solving the Problems In order to solve the above problems, the invention according to claim 1 is, for example, as shown in FIG.
In the column member 1 made of reinforced concrete, the concrete 11 below the column member and the concrete 12 above the column member are constructed by being insulated from each other, and between the concrete 11 below the column member and the concrete 12 above the column member. A cushioning material 14 is interposed, and the concrete 11 below the column member and the concrete 12 above the column member are connected by a reinforcing material 15.

According to the first aspect of the present invention, the concrete at the lower part of the column member and the concrete at the upper part of the column member are constructed by being insulated from each other, and the concrete between the lower part of the column member and the concrete at the upper part of the column member is constructed. When a vibration source is present at the lower part of the structure, such as railroads and road traffic, the vibration source is directed upward through the ground through the ground, etc. The propagating solid sound is blocked by the cushioning material, and can be prevented from propagating to the structural body above the column member. Also,
When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, solid sound propagating downward through the structure from the vibration source is blocked by the cushioning material. Thus, it is possible to prevent the propagation to the structure body below the column member. Further, by selecting the frequency of the solid sound to be cut off and appropriately setting the thickness and material of the cushioning material according to the frequency, the solid sound caused by a specific vibration source can be reliably cut off. Further, since the concrete at the lower part of the pillar member and the concrete at the upper part of the pillar member are connected by a reinforcing material, the stress between the lower part of the pillar member and the upper part of the pillar member is transmitted through the reinforcing material. Therefore, the safety of the pillar member is assured by the same structural calculation as that of a normal pillar member having no cushioning material. Further, the cushioning material can provide a seismic isolation effect for high-frequency components of seismic waves.

The pillar member according to the second aspect is, for example, as shown in FIG.
4 is characterized in that the side surface is covered with the covering material 16.

According to the second aspect of the invention, the same effects as those of the first aspect are obtained, and the side surfaces of the cushioning material are covered with the covering material, and the upper and lower surfaces are covered with concrete. The cushioning material is not exposed to the outside air, and the deterioration of the cushioning material can be suppressed.

According to a third aspect of the present invention, as shown in FIG. 3, for example, in a column member 2 made of a concrete-filled steel pipe, the concrete 21 below the column member and the concrete 22 above the column member are insulated from each other. A cushioning member 24 is interposed between the concrete 21 below the column member and the concrete 22 above the column member.

According to the third aspect of the present invention, the concrete at the lower part of the column member and the concrete at the upper part of the column member are constructed by being insulated from each other, and between the concrete at the lower part of the column member and the concrete at the upper part of the column member. When a vibration source is present at the lower part of the structure, such as railroads and road traffic, the vibration source is directed upward through the ground through the ground, etc. The propagating solid sound is blocked by the cushioning material, and can be prevented from propagating to the structural body above the column member. Also,
When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, solid sound propagating downward through the structure from the vibration source is blocked by the cushioning material. Thus, it is possible to prevent the propagation to the structure body below the column member. Further, by selecting the frequency of the solid sound to be cut off and appropriately setting the thickness and material of the cushioning material according to the frequency, the solid sound caused by a specific vibration source can be reliably cut off. Further, since the concrete at the lower part of the column member and the concrete at the upper part of the column member are connected by a steel pipe, the stress between the lower part of the column member and the upper part of the column member is transmitted through the steel pipe.
Therefore, the safety of the pillar member is assured by the same structural calculation as that of a normal pillar member having no cushioning material. Further, the shock-absorbing material can provide a seismic isolation effect for high-frequency components of seismic waves. Furthermore, since the side surfaces of the cushioning material are covered with the steel pipe and the upper and lower surfaces are covered with concrete, the cushioning material is not exposed to the outside air, and deterioration of the cushioning material can be suppressed.

According to a fourth aspect of the present invention, as shown in FIG. 1 (FIG. 3), in the column member 1 (2) according to any one of the first to third aspects, the cushioning member 14 (24) The thickness 14t (24t) in the axial direction of the pillar member material in a state in which the pillar member 1 (2) is interposed is set to 4 mm or more and 40 mm or less.

According to the fourth aspect of the present invention, the same effects as in any of the first to third aspects are obtained, and the cushioning member is disposed in the axial direction of the column member when the buffer member is interposed therebetween. Since the thickness of the concrete is set to 4 mm or more and 40 mm or less, the horizontal relative displacement between the concrete at the lower part of the column member and the concrete at the upper part of the column member caused by the shearing deformation of the cushioning material when a horizontal external force such as an earthquake force acts on the structure. It is smaller than the size of the whole thing. Therefore, there is no need to provide a clearance on the outer periphery of the structure.

According to a fifth aspect of the present invention, as shown in FIG. 1 (FIG. 3), in the column member 1 (2) according to any one of the first to fourth aspects, the cushioning member 14 (24) It is provided at a substantially central portion in the axial direction of the column member 1 (2).

According to the fifth aspect of the present invention, the same effects as in any of the first to fourth aspects are obtained, and the cushioning member is provided substantially at the center of the column member in the axial direction. However, since the bending moment applied to this portion is smaller than the bending moment applied to both ends of the column member, an excessive stress is not easily applied to the reinforcing member. Therefore, it is possible to provide a pillar member that is mechanically highly safe.

According to a sixth aspect of the present invention, there is provided a solid sound insulation method for an existing structure, as shown in FIG. 5, for example, as shown in FIG. Of the concrete 30 is removed, a cushioning material 34 is interposed in the portion where the concrete 30 is removed, and the concrete 31 below the column member and the concrete 32 above the column member sandwiching the cushioning material 34 are connected by a reinforcing material 35. It is characterized by the following.

According to the sixth aspect of the present invention, in the existing structure having the column member made of reinforced concrete, the concrete at the intermediate portion in the axial direction of the column member 3 is removed, and the portion where the concrete has been removed is removed. By interposing a cushioning material and connecting the concrete at the lower part of the pillar member and the concrete at the upper part of the pillar member sandwiching the cushioning material with a reinforcing material, a vibration source is present at the lower part of the structure such as a railway or road traffic. In this case, the solid-state sound propagating upward in the structure from the vibration source through the ground or the like is blocked by the cushioning material, and can be prevented from propagating to the structure above the column member. . When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, the solid sound that propagates downward from the vibration source through the structure body is a cushioning material. Thus, it can be prevented from being transmitted to the structure body below the column member. Therefore, the solid sound generated in the existing structure is cut off, and added value can be given to the existing structure.

According to a seventh aspect of the present invention, as shown in FIG. 5, in the solid sound insulation method for an existing structure according to the sixth aspect, a side surface of the cushioning material is covered with a covering material. It is characterized by.

According to the seventh aspect of the invention, the same effect as in the sixth aspect is obtained, and the side surfaces of the cushioning material are covered with the covering material, and the upper and lower surfaces are covered with concrete. The cushioning material is not exposed to the outside air, and the deterioration of the cushioning material can be suppressed.

According to an eighth aspect of the present invention, as shown in FIG. 5, in the solid sound insulation method for an existing structure according to the sixth or seventh aspect, the cushioning member 34 is interposed in the column member 3. The thickness 34t of the column member in the axial direction is 4m
It is characterized by being set to not less than m and not more than 40 mm.

According to the eighth aspect of the invention, the same effect as in the sixth or seventh aspect is obtained, and the cushioning member has a thickness in the axial direction of the column member when the buffer member is interposed therebetween. Is set to 4 mm or more and 40 mm or less, so that when a horizontal external force such as seismic force is applied, the horizontal relative displacement between the concrete below the column member and the concrete above the column member caused by the shear deformation of the cushioning material is the entire structure. It is smaller than the size. Therefore, there is no need to provide a clearance on the outer periphery of the structure.

According to a ninth aspect of the present invention, as shown in FIG. 5, for example, in the solid sound insulation method for an existing structure according to any one of the sixth to eighth aspects, the cushioning member 34 comprises Is provided at a substantially central portion in the material axis direction.

According to the ninth aspect of the present invention, the same effect as any one of the sixth to eighth aspects is obtained, and the cushioning member 34 is provided at a substantially central portion of the column member 3 in the axial direction. However, since the bending moment applied to this portion is smaller than the bending moment applied to both end portions of the column member 3, an excessive stress is not easily applied to the reinforcing member 35. Therefore, it is possible to provide the column member 3 which is mechanically highly safe.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] As shown in FIG. 1, a column member 1 according to the present embodiment is a column member 1 made of reinforced concrete.
And the concrete 12 above the column member are insulated from each other, and a cushioning material 14 is interposed between the concrete 11 below the column member and the concrete 12 above the column member. And the concrete 12 above the column member are connected by the reinforcing material 15,
It is schematically configured.

The cushioning member 14 is made of a rubber sheet, and a coating 16 made of rubber having good oxidation resistance and weather resistance is provided around the outer edge thereof, and is formed integrally with the cushioning member 14. The cushioning member 14 has a thickness 14t of 10 m in the column member material axial direction in a state where the cushion member 14 is interposed in the column member 1.
m. The thickness 14t is set so that solid sound in the frequency range to be cut off can be effectively cut off in consideration of the rigidity of the rubber sheet constituting the cushioning material 14, the mass of the structure supported by the column member 1, and the like. , Has been decided. Further, the cushioning member 14 is provided at a substantially central portion of the column member 1 in the material axis direction.

The reinforcing member 15 is made of a steel plate. The reinforcing member 15 is fixed to the concrete 11 above the column member and the concrete 12 below the column member by bolts 15a,.

The procedure for installing the column member 1 according to the present embodiment will be described below. First, as shown in FIG.
Are assembled, and the straps 18, ... are wound around the main bars 17, ... to half the floor height.

Next, as shown in FIG. 2 (b), a formwork F is erected to a position at half the floor height, and concrete 11 below the column members is poured into the formwork F.

When the concrete 11 below the column member has hardened, as shown in FIG. 2 (c), the through holes 14h,. , A cushioning material 14 is provided. Subsequently, the straps 18, around the main bars 17, above the cushioning material 14, are connected.
Wrap.

Further, as shown in FIG. 2 (d), a formwork F is attached around the column member 1 in the upper half of the floor height, and concrete 12 above the column member is cast therein.

When the concrete 12 above the column member has hardened, the form F is removed. Then, as shown in FIG. 2 (e), the reinforcing member 15 is fixed to the concrete 11 below the column member and the concrete 12 above the column member with bolts 15a,. The concrete 12 on the upper part of the member is connected, and the column member 1 is completed.

[Second Embodiment] As shown in FIG. 3, a column member 2 according to the present embodiment is a column member 2 made of a concrete-filled steel pipe. The concrete 22 is constructed by being insulated from each other, and a cushioning material 24 is interposed between the concrete 21 below the column member and the concrete 22 above the column member, so that the structure is roughly configured.

The cushioning member 24 is made of a rubber sheet. The buffer member 24 has a thickness 24t in the axial direction of the column member set to 10 mm in a state of being interposed between the column members 2. The thickness 24t is set so that solid sound in the frequency range to be cut off can be effectively cut off in consideration of the rigidity of the rubber sheet constituting the cushioning member 24, the mass of the structure supported by the column member 2, and the like. , Has been decided. Further, the cushioning member 24 is provided substantially at the center of the column member 2 in the material axis direction.

The procedure for installing the column member 2 according to the present embodiment will be described below. First, as shown in FIG.
Stand up.

Next, as shown in FIG.
The concrete 21 below the column member is cast into the inside of the space to a position approximately half the floor height.

When the concrete 21 below the column member has hardened, as shown in FIG. 4C, a cushioning material 24 is placed on the concrete 21 below the column member.

Subsequently, as shown in FIG.
Pour concrete 22 above the column members inside 3
When the concrete 12 above the pillar member is hardened, the pillar member 2 is completed.

As described above, according to the column members 1 and 2 described in the first and second embodiments, the concrete 11 and 21 at the lower part of the column member and the concrete 1 at the upper part of the column member are used.
2 and 22 are insulated from each other, and cushioning materials 14 and 24 are interposed between the concrete 11 and 21 below the column member and the concretes 12 and 22 above the column member. When a vibration source is present below the structure, such as in road traffic, solid sound propagating upward through the structure from the vibration source through the ground or the like is cut off by the buffer members 14, 24. , The column member 1,
It can be prevented from propagating to the structure body higher than 2.
When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, the solid sound that propagates downward from the vibration source through the structure body is a cushioning material. 14 and 24, the column members 1, 2
It can be prevented from propagating to the structure skeleton below. Also, by selecting the frequency of the solid sound to be cut off and appropriately setting the thickness and material of the cushioning members 14 and 24 in accordance with the frequency, solid sound caused by a specific vibration source can be reliably cut off. Can be. Further, the cushioning materials 14, 24
Thereby, a seismic isolation effect can be obtained for the high frequency component of the seismic wave.

The cushioning members 14, 24 have a thickness of 10 mm in the axial direction of the pillar members when they are interposed between the pillar members 1, 2, so that horizontal shocks such as seismic force can be applied. Sometimes, the horizontal relative displacement between the concrete 11 and 21 above the column member and the concrete 12 and 22 below the column member caused by the shear deformation of the cushioning members 14 and 24 is smaller than the size of the entire structure. . Therefore,
There is no need to provide clearance around the periphery of the structure.

The cushioning members 14 and 24 are provided substantially at the center of the column members 1 and 2 in the axial direction. The bending moment applied to this portion is applied to both ends of the column members 1 and 2. Since it is smaller than the bending moment, an excessive stress is less likely to be applied to the reinforcing member 15 or the steel pipe 23. Therefore, it is possible to provide a pillar member that is mechanically highly safe.

Further, the column member 1 according to the first embodiment
According to this, since the concrete 11 at the lower part of the column member and the concrete 12 at the upper part of the column member are connected by the reinforcing member 15, the stress between the lower part of the column member and the upper part of the column member is transmitted through the reinforcing member 15. You. Therefore, the mechanical stability of the column member 1 is guaranteed by the same structural calculation as that of a normal column member having no cushioning material interposed.

The side surface of the cushioning material 14 is
And the upper and lower surfaces are covered with the concretes 11 and 12, so that the cushioning member 14 is not exposed to the outside air, and the deterioration of the cushioning member 14 can be suppressed.

Further, the column member 2 according to the second embodiment
According to this, since the concrete 21 at the lower part of the pillar member and the concrete 22 at the upper part of the pillar member are connected by the steel pipe 23, the stress between the lower part of the pillar member and the upper part of the pillar member is transmitted through the steel pipe 23. Therefore, the column member 2
The mechanical safety is guaranteed by the same structural calculation as a normal column member without a cushioning material. Further, since the side surfaces of the cushioning material 24 are covered with the steel pipe 23 and the upper and lower surfaces are covered with concrete 21 and 22, the cushioning material 24 is not exposed to the outside air, and the cushioning material 24 is deteriorated. Can be suppressed.

[Third Embodiment] In the solid sound insulation method for an existing structure according to the present embodiment, as shown in FIG. 5, the column member 3 of an existing structure having a column member 3 made of reinforced concrete is used. The concrete 30 at the intermediate portion in the axial direction of No. 3 is removed, and the cushioning material 34 is added to the portion where the concrete 30 is removed.
And the concrete 31 at the upper part of the column member and the concrete 32 at the lower part of the column member sandwiching the cushioning member 34 are connected by a reinforcing member 35.

The cushioning member 34 is made of a rubber sheet. A covering 36 made of rubber having good oxidation resistance and weather resistance is provided around the outer edge thereof, and is formed integrally with the cushioning member 34. In addition, on each of the upper and lower surfaces of the cushioning material 34,
A steel plate (not shown) is attached in advance. On the surface of the steel plate, there are provided projections for improving the fixability between the cushioning material 34 and the concrete 31 below the column member and the concrete 32 above the column member. The buffer member 34 has a thickness 34t in the axial direction of the column member material set to 10 mm in a state of being interposed between the column members 3. The thickness 34t is set so that solid sound in the frequency range to be cut off can be effectively cut off in consideration of the rigidity of the rubber sheet constituting the cushioning material 34, the mass of the structure supported by the column member 3, and the like. , Has been decided. Further, the cushioning member 34 is provided at a substantially central portion of the column member 3 in the axial direction of the member.

The construction procedure of the solid sound insulation method for an existing structure according to the present embodiment will be described below. First, as shown in FIG. 5A, the periphery of the beam-to-column joint A of the existing structure and the periphery of the column member 3 are reinforced with temporary materials T1 and T2, respectively.

Next, as shown in FIG.
Is supported by the jack J, and the concrete 30 substantially at the center in the axial direction of the column member 3 is removed.

Subsequently, as shown in FIG. 5 (c), a cushioning material 34 is interposed in the portion from which the concrete 30 has been removed, and the concrete 31 below the pillar member and the concrete 32 above the pillar member and the cushioning material 34 Grout or resin is injected into the gap to fix the gap between the concrete 31 below the column member and the concrete 32 above the column member and the cushioning material 34.

Further, as shown in FIG. 5 (d), the reinforcing member 15 is connected to the concrete 3 below the pillar member with the buffer member 34 interposed therebetween.
The concrete 31 at the lower part of the column member and the concrete 32 at the upper part of the column member are connected to each other by fixing them to the concrete 1 at the upper part of the column member with bolts (not shown). Finally, the jack J and the temporary materials T1 and T2 are removed, and the construction of the existing structure of the present embodiment by the solid sound insulation method is completed.

As described above, according to the solid sound insulation method for an existing structure described in the third embodiment, the existing structure provided with the column member 3 made of reinforced concrete has an intermediate portion in the axial direction of the column member 3. The concrete 30 is removed, and a cushioning material 34 is interposed in a portion where the concrete 30 is removed, and upper and lower concretes 31 and 32 sandwiching the cushioning material 34 are used as reinforcing materials 3.
If there is a vibration source at the lower part of the structure such as railway or road traffic, the solid sound propagating upward through the ground through the structure etc. Blocked by the cushioning material 34,
Propagation to the structural body above the column member 3 can be prevented. In addition, equipment installed on the roof of the building,
When a vibration source is present above the structure, solid sound propagating downward from the vibration source through the structure body is cut off by the buffer material 34 and the column member 3
It can be prevented from propagating to the structure skeleton below. Therefore, the solid sound generated in the existing structure is cut off, and added value can be given to the existing structure.

The side surface of the cushioning material 34 is
, And the upper and lower surfaces are covered with the concretes 31 and 32, so that the cushioning material 34 is not exposed to the outside air, and the deterioration of the cushioning material 34 can be suppressed. Further, since a steel plate (not shown) is attached to each of the upper and lower surfaces of the cushioning material 34 in advance, the cushioning material 34 can be easily installed horizontally, and a projection is provided on the surface of the steel plate. , Cushioning material 34, concrete 31 below the column member and concrete 32 above the column member
And the fixability between them is increased.

The cushioning member 34 has a thickness of 10 m in the axial direction of the pillar member when it is interposed between the pillar members 3.
m, the concrete 31 at the lower part of the column member and the concrete 32 at the upper part of the column member generated by the shear deformation of the cushioning material 34 when a horizontal external force such as an earthquake force acts.
Is relatively small compared to the size of the entire structure. Therefore, there is no need to provide a clearance on the outer periphery of the structure.

The cushioning member 34 is provided substantially at the center of the column member 3 in the axial direction of the column member 3. The bending moment applied to this portion is smaller than the bending moment applied to both ends of the column member 3. Due to the small size, excessive stress is not easily applied to the reinforcing member 35. Therefore, it is possible to provide the column member 3 which is mechanically highly safe.

The method for blocking solid noise of a column member and an existing structure according to the present invention is not limited to the above embodiments, and various improvements and design changes may be made without departing from the gist of the present invention. You may go. For example, in each of the above embodiments, the thickness of the cushioning material 14t, 24t, 3
Each of the 4t is formed to 10 mm, but the present invention is not limited to this, and the frequency of the solid sound to be cut off is selected, and the thickness of the cushioning material is appropriately set according to the frequency. In addition, solid noise caused by a specific vibration source can be reliably shut off. As in the above embodiments, when the thickness of the cushioning material is set to 4 mm or more and 40 mm or less, the concrete between the lower part of the pillar member and the concrete on the upper part of the pillar member caused by the shear deformation of the cushioning material. The relative displacement is smaller than the size of the entire structure, and there is no need to provide a clearance on the outer periphery of the structure. In addition, cushioning materials 14, 24, 34
Are respectively provided at substantially the center of the column members 1, 2, 3 in the axial direction of the material, but may be provided at a position of about 1 m above the floor surface where the construction work is easy to perform. Or may be provided on the column base. As in the above embodiments, when the cushioning material is provided at a substantially central portion in the axial direction of the column member, the bending moment applied to this portion is compared with the bending moment applied to both ends of the column member. Therefore, an excessive stress is not easily applied to the reinforcing member, and a pillar member having high mechanical safety can be obtained.

In the first and third embodiments, the covering members 16 and 36 are provided around the outer edges of the cushioning members 14 and 34, respectively. Although formed integrally, the present invention is not limited to this. For example, after the cushioning material is interposed between the concrete below the column member and the concrete above the column member, the side surface of the cushioning material is A covering material may be wound around the cover. Also,
When the reinforcing material is formed so as to cover all side surfaces of the cushioning material, the reinforcing material also serves as the covering material, and there is no need to prepare a separate covering material.

In the first and second embodiments, the cushioning members 14 and 24 are in direct contact with the concrete 11 and 21 below the column member and the concrete 12 and 22 above the column member. Although they are interposed in a state, like the cushioning material 34 of the third embodiment, the cushioning materials 14, 2
A steel plate may be previously attached to the upper and lower surfaces of 4. In this case, it becomes easy to install the cushioning material horizontally. Further, if protrusions such as studs are provided on the surface of the steel plate, fixability between the cushioning material and the concrete below the column member and the concrete above the column member is enhanced. In addition, since a steel plate (not shown) is previously attached to each of the upper and lower surfaces of the cushioning member 34, the cushioning member 34 can be installed horizontally, and a projection is provided on the surface of the steel plate. Material 34 and concrete 3 under the column member
The fixing property between the concrete member 1 and the upper part of the column member 32 is enhanced. In the third embodiment, a steel plate is attached to the upper and lower surfaces of the cushioning member 34, but this steel plate may be omitted. In addition, it is needless to say that specific detailed structures and the like can be appropriately changed.

[0058]

According to the first aspect of the present invention, the concrete at the lower part of the column member and the concrete at the upper part of the column member are constructed by being insulated from each other, and the concrete at the lower part of the column member and the concrete at the upper part of the column member are formed. When a vibration source is present at the lower part of the structure, such as railroads and road traffic, there is a cushioning material between them, so that the vibration source goes upward through the ground and the like into the structure body. The solid sound that propagates through the structure is cut off by the cushioning material, and can be prevented from propagating to the structural body above the column member. When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, the solid sound that propagates downward from the vibration source through the structure body is a cushioning material. Thus, it can be prevented from being transmitted to the structure body below the column member. Further, by selecting the frequency of the solid sound to be cut off and appropriately setting the thickness and material of the cushioning material according to the frequency, the solid sound caused by a specific vibration source can be reliably cut off. Further, since the concrete at the lower part of the pillar member and the concrete at the upper part of the pillar member are connected by a reinforcing material, the stress between the lower part of the pillar member and the upper part of the pillar member is transmitted through the reinforcing material. Therefore, the safety of the pillar member is assured by the same structural calculation as that of a normal pillar member having no cushioning material. Further, the cushioning material can provide a seismic isolation effect for high-frequency components of seismic waves.

According to the second aspect of the present invention, the same effects as those of the first aspect are obtained, and the side surfaces of the cushioning material are covered with the covering material, and the upper and lower surfaces are covered with concrete. The material is not exposed to the outside air,
Deterioration of the cushioning material can be suppressed.

According to the third aspect of the present invention, the concrete at the lower part of the column member and the concrete at the upper part of the column member are constructed by being insulated from each other, and between the concrete at the lower part of the column member and the concrete at the upper part of the column member. Is equipped with a cushioning material, so if there is a vibration source at the bottom of the structure such as railway or road traffic, the vibration source will propagate upward through the ground through the structure The solid sound generated is blocked by the cushioning material, and can be prevented from propagating to the structural body above the column member. When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, the solid sound that propagates downward from the vibration source through the structure body is a cushioning material. Thus, it can be prevented from being transmitted to the structure body below the column member. Further, by selecting the frequency of the solid sound to be cut off and appropriately setting the thickness and material of the cushioning material according to the frequency, the solid sound caused by a specific vibration source can be reliably cut off. Further, since the concrete at the lower part of the pillar member and the concrete at the upper part of the pillar member are connected by a reinforcing material, stress between the upper part of the pillar member and the lower part of the pillar member is transmitted through the reinforcing material.
Therefore, the safety of the pillar member is assured by the same structural calculation as that of a normal pillar member having no cushioning material. Further, the shock-absorbing material can provide a seismic isolation effect for high-frequency components of seismic waves. Furthermore, since the side surfaces of the cushioning material are covered with the steel pipe and the upper and lower surfaces are covered with concrete, the cushioning material is not exposed to the outside air, and deterioration of the cushioning material can be suppressed.

According to the invention described in claim 4, claims 1 to 1 are provided.
3 and the buffer member has a thickness in the axial direction of the column member of 4 mm or more and 40 mm or less in a state of being interposed in the column member. When a horizontal external force is applied, the horizontal relative displacement between the concrete at the lower part of the column member and the concrete at the upper part of the column member caused by the shear deformation of the cushioning material is smaller than the size of the entire structure. Therefore, there is no need to provide a clearance on the outer periphery of the structure.

According to the invention described in claim 5, claims 1 to 1
4 and the cushioning material is provided substantially at the center of the column member in the axial direction. The bending moment applied to this portion is the bending moment applied to both ends of the column member. , It is difficult for an excessive stress to be applied to the reinforcing material. Therefore, it is possible to provide a pillar member that is mechanically highly safe.

According to the sixth aspect of the present invention, in the existing structure having the column member made of reinforced concrete, the concrete at the intermediate portion in the axial direction of the column member 3 is removed, and the portion from which the concrete has been removed is buffered. When a vibration source is present at the lower part of a structure such as a railway or road traffic by connecting the concrete at the lower part of the column member and the concrete at the upper part of the column member with a reinforcing material In this case, the solid-state sound propagating upward from the vibration source through the ground or the like through the ground or the like is blocked by the cushioning material, and can be prevented from propagating to the structural body above the column member. When a vibration source is present at the top of a structure, such as equipment installed on the roof of a building, the solid sound that propagates downward from the vibration source through the structure body is a cushioning material. Thus, it can be prevented from being transmitted to the structure body below the column member. Therefore, the solid sound generated in the existing structure is cut off, and added value can be given to the existing structure.

According to the seventh aspect of the invention, the same effect as in the sixth aspect is obtained, and the side surfaces of the cushioning material are covered with the covering material, and the upper and lower surfaces are covered with concrete. The material is not exposed to the outside air,
Deterioration of the cushioning material can be suppressed.

According to the eighth aspect of the invention, the same effect as in the sixth or seventh aspect is obtained, and the cushioning member has a thickness in the axial direction of the pillar member when the cushioning member is interposed in the pillar member. Since it is set to 4 mm or more and 40 mm or less, when a horizontal external force such as seismic force is applied, the horizontal relative displacement between the concrete at the lower part of the column member and the concrete at the upper part of the column member caused by the shear deformation of the cushioning material causes the entire structure to be displaced. It is smaller than the size. Therefore, there is no need to provide a clearance on the outer periphery of the structure.

According to the ninth aspect of the present invention, claims 6 to
8 and the cushioning material is provided substantially at the center in the axial direction of the column member. The bending moment applied to this portion is the bending moment applied to both ends of the column member. , It is difficult for an excessive stress to be applied to the reinforcing material. Therefore, it is possible to provide a pillar member that is mechanically highly safe.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a column member of the present invention.

FIG. 2 is a side view showing a construction procedure of the same example.

FIG. 3 is a perspective view showing another example of the column member of the present invention.

FIG. 4 is a side view showing a construction procedure of the same example.

FIG. 5 is a side view showing an example of the solid sound insulation method for an existing structure according to the present invention.

[Explanation of symbols]

1,2,3 Pillar member 11,21,31 Concrete at lower part of pillar member 12,22,32 Concrete at upper part of pillar member 30 Concrete at middle part of pillar member material in axial direction 14,24,34 Buffer material 14t, 24t, 34t ( Thickness of cushioning material 15,35 reinforcing material 16,36 covering material

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Jiji Kimura 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction F-term (reference) 2E001 DF02 DF06 FA02 GA12 GA63 GA66 HE01 KA03 KA05 LA10 2E163 FA02 FD03 FD44 FD46 FD49 FF17 2E176 AA04 BB13 BB28 BB29

Claims (9)

[Claims] 1. A column member made of reinforced concrete, wherein the concrete below the column member and the concrete above the column member are constructed so as to be insulated from each other, and between the concrete below the column member and the concrete above the column member. A column member, wherein a cushioning material is interposed, and the concrete below the column member and the concrete above the column member are connected by a reinforcing material. 2. The column member according to claim 1, wherein a side surface of said cushioning material is covered with a covering material. 3. A column member made of a concrete-filled steel pipe, wherein the concrete at the lower portion of the column member and the concrete at the upper portion of the column member are constructed so as to be insulated from each other, and between the concrete at the lower portion of the column member and the concrete at the upper portion of the column member. A cushion member is interposed in the column member. 4. The cushioning member has a thickness in the axial direction of the pillar member material of 4 mm or more and 40 mm in a state of being interposed between the pillar members.
The column member according to any one of claims 1 to 3, wherein the column member is set as follows. 5. The column member according to claim 1, wherein the cushioning member is provided at a substantially central portion in the axial direction of the column member. 6. An existing structure provided with a pillar member made of reinforced concrete, removing concrete at an intermediate portion of the pillar member in the axial direction of the pillar member, and interposing a cushioning material in a portion from which the concrete has been removed. A solid sound insulation method for an existing structure, wherein the concrete at the lower part of the column member and the concrete at the upper part of the column member are sandwiched by a reinforcing material. 7. A method according to claim 6, wherein a side surface of said cushioning material is covered with a covering material. 8. The cushioning member has a thickness in the axial direction of the column member of 4 mm or more and 40 mm when interposed between the column members.
8. The method according to claim 6, wherein:
The solid sound isolation method for existing structures as described. 9. The method according to claim 6, wherein the cushioning member is provided at a substantially central portion of the pillar member in the axial direction of the member.