JP4787538B2 - Vibration control structure - Google Patents

Description

  The present invention relates to a vibration damping structure.

  There are various structures around the joint where the columnar part and the beam-like part of the building structure are joined in order to reinforce the building structure or to exert a damping effect (or seismic isolation effect). Proposed.

  For example, Patent Document 1 describes a seismic reinforcement structure for a concrete structure in which a range in which a plastic hinge at the end of a beam member is supposed to be formed is formed of a fiber-reinforced cement material.

  However, when the fiber-reinforced cement material is used as described above, so-called on-site construction becomes difficult.

  For this reason, it is necessary to form a beam member by precast, and the use is limited, such as difficulty in later repair.

  On the other hand, Patent Document 2 describes a building damper material having a sea-island structure made of two types of plastics having different hardnesses, and a building damper in which this building damper material is formed into a sheet shape. Therefore, an excellent vibration control effect can be obtained.

However, this damper is mainly used for wooden buildings, and it is necessary to use nails, bolts, etc. when fixing to the building structure. For this reason, it is difficult to apply to a building structure such as concrete that is difficult to attach with a fixing member such as a nail or a bolt.
Japanese Patent Laid-Open No. 2004-44197 Japanese Patent Laid-Open No. 2005-30585

  In view of the above facts, an object of the present invention is to obtain a damping structure that can be attached to a building structure that is difficult to attach with a fixing member and that can be easily constructed on site.

In the invention according to claim 1, formed into a sheet by a flexible material, a damper body and a columnar portion and a beam-shaped portion of the building structure is disposed Joint part around to be joined, the damper An opening that is open at least on the side of the main body facing the building structure; and an adhesive that fills the opening and bonds the damper main body to the surface of the building structure around the joint .

That is, an opening is opened at least on the side of the damper body facing the building structure, and the opening is filled with an adhesive. The hardened adhesive acts as a cotter for causing the damper body to follow the movement around the joint. Thereby, a damper main body can be attached to a building structure. Since it is attached without using a fixing member, it can be applied to a building structure (for example, a building structure made of concrete) that is difficult to mount with a fixing member. The damper body can be attached to the building structure with a simple structure in which the opening is opened at least on the side of the damper body facing the building structure. The opening may or may not penetrate through the damper body in the thickness direction.

  Further, since the damper main body can be arranged at a desired position around the joint portion, construction on the site is facilitated.

Damper body is made of a flexible material, the damper body is attached to the building structure, exhibits follow and damper effect the deformation of the building structure around the specification mouth. Thereby, the energy of deformation can be absorbed and the attenuation effect can be obtained.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the damper main body is embedded in the surface side of the building structure.

  In general, since the surface of a building structure is most deformed, it is possible to maximize the damping effect by embedding the damper body on the surface side of the building structure. For example, in a concrete building structure, cracks are likely to occur on the surface, but if the damper body is embedded on the surface side of the building structure, cracks can be prevented.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the opening is configured to include a notch formed on the outer periphery of the damper main body. And

In this way, by forming a notch on the outer periphery of the damper main body to form an opening , the damper main body can easily follow the movement of the corner portion of the joint portion where cracks are likely to occur.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the opening includes a hole formed in the damper main body. It is characterized by that.

An opening can be configured simply by drilling a hole in the damper body.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a plurality of the holes are formed at substantially equal intervals.

  By arranging the holes substantially evenly, partial stress concentration on the damper main body can be alleviated, and the damping effect can be exhibited over the entire surface.

In invention of Claim 6 , in the invention of any one of Claims 1-5 , the said opening part is the taper which was gradually expanded toward the outer surface from the opposing surface with a building structure. It is characterized by being shaped.

  As a result, it is possible to prevent the damper body from peeling off or falling off from the surface of the building structure.

The invention according to claim 7 is the invention according to any one of claims 1 to 6 , wherein the damper main body has a shear elastic modulus of 10 N / mm ² or more at a shear strain of 5% and a loss. The coefficient is 0.2 or more.

  As a result, the damper body exhibits ductile properties and not only has excellent physical properties such as impact resistance and durability, but also exhibits a sufficient energy absorbing function.

  Since this invention set it as the said structure, it can attach also to the building structure where attachment by a fixing member is difficult, and construction on the field also becomes easy.

  FIG. 1 shows a sheet-like damper 32 used in the vibration damping structure 30 according to the first embodiment of the present invention. FIG. 2 shows a schematic configuration of a reinforced concrete building 12 (or a building structure such as a PC structure, a steel reinforced concrete structure, a steel structure, or a wooden structure) to which the sheet-like damper 32 is applied. It is shown. In the drawings, the vertical direction is indicated by an arrow V.

  The building 12 has a plurality of pillars 14 and beams 16, and a joint portion thereof serves as a joint portion 18. As shown in an enlarged view in FIG. 2B, the sheet-like damper 32 of the present embodiment is disposed in the vicinity of the joint portion 18.

  As shown in FIGS. 1A and 1B, the sheet-like damper 32 is formed into a substantially rectangular (substantially square in FIG. 1A) sheet shape by a flexible material (for example, plastic plastic). .

  A plurality of substantially semicircular cutouts 34 penetrating the sheet damper 32 are formed on the outer periphery of the sheet damper 32. In addition, a plurality of circular holes 36 penetrating the sheet-like damper 32 are also formed inside the sheet-like damper 32. The cutout 34 and the hole 36 are formed at regular intervals in the vertical direction and the horizontal direction.

  As shown in FIGS. 1B and 1C, the cutout portion 34 and the hole portion 36 have their opening sections gradually expanded from one surface of the sheet-like damper 32 to the other surface. Further, it is formed in a taper shape. As shown in FIG. 3A, in the state of attachment of the sheet-like damper 32 to the building 12, the surface of the cutout portion 34 and the hole 36 with a small opening cross section is an attachment surface 38 facing the outer surface 12S of the building 12. The opposite surface is the outer surface 40 exposed to the outside.

In the vibration damping structure 30 of the present embodiment using the sheet-shaped damper 32 having such a configuration, for example, when a building 12 is newly constructed, as shown in FIGS. 2B and 3A, the sheet-shaped damper is provided. The 32 mounting surfaces 38 are arranged on the outer surface 12S side of the building 12. In the following, a method (so-called concrete cotter method) in which the notch 34 and the hole 36 are filled with concrete 20 and the sheet damper 32 is attached to the building 12 will be described. The present invention is essentially described later. As described above, the notch 34 and the hole 36 are filled with an adhesive.
In this concrete cotter method, when the concrete 20 is placed, the notch 34 and the hole 36 are filled with the concrete 20 so that the outer surface 40 is exposed (particularly, in this embodiment, from FIG. 3A). As can be seen, the outer surface 40 and the outer surface 12S of the building 12 are flush with each other). Thus, the concrete 20 after curing exhibit the effect of the cotter, ing to the sheet-like damper 32 is engaged is attached to the building 12 by concrete 20 in the notches 34 and the holes 36. Therefore the so to attachment of the sheet-like damper 32 is not necessary to use the fixing member such as nails and bolts, (building 12 according to the example embodiment) concrete building structure or the like, mounting difficult if conventional It can be easily applied to building structures that have been. Further, when the sheet-like damper 32 is attached, the cutout portion 34 and the hole portion 36 are only filled with concrete, so that it can be easily attached at a desired position around the joint portion 18 on the site.

  In the sheet-like damper 32 attached to the building 12 in this way, the concrete 20 in the notch 34 and the hole 36 plays a cotter action, and the sheet-like damper 32 is moved around the joint 18. Follow. For this reason, when vibration due to an earthquake or the like occurs in the building 12, the sheet-like damper 32 plastically deforms in the vicinity of the joint portion 18 and exhibits a damper effect following the deformation of the building 12 in the vicinity of the joint portion 18. . As a result, the energy of deformation of the building 12 can be absorbed to obtain a damping effect.

  In addition, the cutout portion 34 and the hole portion 36 are gradually expanded from the mounting surface 38 toward the outer surface 40, and the inside thereof is filled with the concrete 20, so that the sheet-like damper 32 is inadvertently formed. Peeling and falling off can be prevented.

  FIG. 4 shows a sheet-like damper 52 used in the vibration damping structure 50 (see FIG. 5A) according to the second embodiment of the present invention. Hereinafter, in 2nd Embodiment, the same code | symbol is attached | subjected to the same component, member, etc. as 1st Embodiment, and the detailed description is abbreviate | omitted.

  The sheet-like damper 52 according to the second embodiment is different from the first embodiment in that the opening cross sections of the cutout portion 54 and the hole portion 56 are constant from the attachment surface 58 to the outer surface 60. Note that the notches 54 and the holes 56 are formed at regular intervals in the vertical direction and the horizontal direction as in the first embodiment.

  The sheet-like damper 52 of the second embodiment is attached to the existing building 42 by, for example, repair work. At the time of attachment, the attachment surface 58 is brought into surface contact with the surface 42S of the building 42, the sheet-like damper 52 is disposed at a desired position around the joint portion 48, and the adhesive 62 (curing agent) is formed in the notch portion 54 and the hole portion 56. ) And is adhered to the surface 42S of the pill 42, whereby the sheet-like damper 52 is attached to the building 42 (so-called adhesive cotter method). In the case of the adhesive cotter method, it can be used for a steel structure or a wooden building structure.

  Therefore, in the vibration damping structure 50 of the second embodiment, the adhesive 62 acts as a cotter, and when vibration due to an earthquake or the like occurs in the building 42 as in the first embodiment, in the vicinity of the joint portion 48, The sheet-like damper 52 is plastically deformed and follows the deformation in the vicinity of the joint portion 48 to exhibit a damper effect. As a result, the energy of deformation of the building 42 can be absorbed to obtain a damping effect.

  Further, since it is not necessary to use a fixing member such as a nail or a bolt for attaching the sheet-like damper 52, it can be easily applied to a building structure that has been difficult to attach conventionally. When the sheet-like damper 52 is attached, the adhesive agent 62 is only filled in the notch portion 54 and the hole portion 56, so that it can be easily attached at a desired position around the joint portion 48 at the site. In particular, in the second embodiment, by using the adhesive 62, unlike the first embodiment, it can be easily attached to the existing building 42.

  The sheet-like damper 32 of the first embodiment can be attached to the buildings 12 and 42 by an adhesive cotter method, and the sheet-like damper 52 of the second embodiment is attached to the buildings 12 and 42 by a concrete cotter method. Is also possible. However, from the viewpoint of preventing inadvertent peeling and dropping of the sheet-like damper, it is preferable that the opening cross section gradually expands from the mounting surface 38 toward the outer surface 40 as in the first embodiment. Further, from the viewpoint of facilitating the manufacture of the sheet-like damper, it is preferable to form the notch portion 54 and the hole portion 56 having a constant opening cross section as in the second embodiment.

Further, the opening according to the present invention does not necessarily have to penetrate through the sheet-like dampers 32 and 52 in the thickness direction like the notches 34 and 54 and the holes 36 and 56 described above. In short, a configuration in which an opening filled with concrete or an adhesive is simply opened on the side facing the mounting building structure, or a recess formed on the side facing the building may be used. However, if the opening is a recess, there may be restrictions on the filling of concrete or adhesive, so it is preferable to have a shape that penetrates the sheet-like dampers 32 and 52.

It is not necessary that both the notch and the hole are formed in one sheet-like damper, and only one of them may be used. For example, like the sheet-like damper 74 shown in FIG. 6, the notch part 76 may be formed only in two opposing sides. Of course, you may form the notch part 76 in all the outer periphery (4 sides). In particular, it is preferable to attach the sheet-like damper to the building at the notch formed on the outer periphery of the sheet-like damper because the sheet-like damper can easily follow the movement of the corner portion of the joint portion where cracks are likely to occur.

  The notches 34, 54, 76 and the holes 36, 56 do not have to be substantially evenly spaced. It is preferable because the damping effect can be exerted over the entire surface of the sheet-like damper.

  The shapes of the notches 34, 54, 76 and the holes 36, 56 are not limited to a circle, but may be an ellipse or a polygon (for example, a rectangular notch 76 shown in FIG. 6).

  The sheet-like dampers 32 and 52 are preferably embedded on the surface side of the building as described above. That is, in general, the surface of a building structure such as a building is most deformed, so that the damping effect can be maximized by embedding the sheet-like dampers 32 and 52 on the surface side of these building structures. Is possible. In addition, cracks are likely to occur on the surface of a concrete building structure such as a building, but if the sheet-like dampers 32 and 52 are embedded on the surface side of the building structure, the cracks can be prevented.

The material of the sheet-like damper is not particularly limited as long as it can absorb the energy due to vibration of the building structure due to hysteresis damping due to deformation and exhibit a damping effect, for example, plastic plastic (for example, “ASUWAN” (product Resin), low yield point metal (lead as an example), and the like. In particular, the damper material exhibits ductile properties, is excellent in physical properties such as impact resistance and durability, and has a sufficient energy absorption function, so that the shear elastic modulus is 10 N / mm ² or more at a shear strain of 5%. And the loss coefficient is preferably 0.2 or more.

The sheet-like damper of 1st Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A), (C) is a partially expanded perspective view. The building to which this invention was applied is shown, (A) is a schematic perspective view of the whole, (B) is a perspective view of the vicinity of a joint part. The state which the sheet-like damper of 1st Embodiment of this invention was attached to the building is shown partially, (A) is a longitudinal cross-sectional view, (B) is a front view. The sheet-like damper of 2nd Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A), (C) is a partially expanded perspective view. The state which the sheet-like damper of 2nd Embodiment of this invention was attached to the building is shown partially, (A) is a longitudinal cross-sectional view, (B) is a front view. It is a front view which shows the other example of the sheet-like damper which concerns on this invention.

Explanation of symbols

12 Building 12S Exterior 14 Column 16 Beam 18 Joint 20 Concrete 30 Damping Structure 32 Sheet Damper (Damper Body)
34 Notch (opening)
36 hole (opening)
38 Mounting surface 40 Outer surface 42 Building 48 Joint part 50 Damping structure 52 Sheet damper (Damper body)
54 Notch (opening)
56 hole (opening)
58 Mounting surface 60 Outer surface 62 Adhesive 74 Sheet-like damper 76 Notch (opening )

Claims (7)

A damper main body formed in a sheet shape by a flexible material and disposed around a joint portion where a columnar portion and a beam-shaped portion of a building structure are joined;
An opening that is open on at least the surface of the damper body facing the building structure; and
An adhesive that fills the opening and bonds the damper body to the surface of the building structure around the joint;
Damping structure with The damper body is embedded in the surface side of the building structure,
The vibration damping structure according to claim 1. The opening is a notch formed on the outer periphery of the damper body,
The vibration damping structure according to claim 1 , wherein the vibration damping structure is configured to include The opening is a hole formed in the damper body;
The vibration damping structure according to claim 1, comprising: The vibration control structure according to claim 4 , wherein a plurality of the holes are formed at substantially equal intervals. The said opening part is made into the taper shape gradually expanded toward the outer surface from the opposing surface with a building structure, The damping control of any one of Claims 1-5 characterized by the above-mentioned. Construction. 7. The damper body according to claim 1 , wherein the damper main body has a shear elastic modulus of 10 N / mm ² or more and a loss coefficient of 0.2 or more when the shear strain is 5%. Vibration control structure.

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