JP3750404B2 - Damping structure for structures with miscellaneous walls - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to vibration control of a structure provided with a miscellaneous wall that uses a miscellaneous wall such as a bundle wall, a waist wall, a sleeve wall or a hanging wall provided in a structure such as a building. Concerning structure.
[0002]
[Prior art]
Conventionally, building damping structures mainly composed of S structures include those using low yield point steel for Y-type braces, etc., and those using viscous materials such as viscoelastic walls and oil dampers. These damping elements such as low yield point steel and viscous material are incorporated in the main frame consisting of steel columns and steel beams, and absorb vibration energy by utilizing deformation and deformation speed of the main frame caused by earthquakes and winds. It is like that.
[0003]
[Problems to be solved by the invention]
However, in such a conventional vibration control structure, the RC structure or the SRC structure concrete building has a small deformation of the concrete structure when subjected to the earthquake motion. There are problems as shown in (1) and (2).
[0004]
(1) In the case of a damping structure using low-yield point steel, the damping effect is small unless the amount of deformation of the concrete structure is large, and when it is deformed until the damping effect is fully exhibited, Cracks and destruction will occur in the structure.
[0005]
(2) In the case of damping structures using viscous materials, there are already those using damping elements such as oil dampers and viscoelastic walls, but the connection structure between these damping elements and the concrete structure is complicated. Inevitably, the construction cost will come.
[0006]
In addition, when the damping elements such as the above-mentioned low yield point steel and viscous material are retrofitted into an existing structure to reinforce it, the construction of the main structure requires a large amount of work, which makes it extremely difficult to construct. In addition, the construction cost will be enormous. In addition, since the vibration damping element occupies a large space in the opening surrounded by columns and beams, it is subject to significant restrictions in the design plan for layout of passages and living spaces, and the installation location is limited. There was a problem of ending up.
[0007]
Therefore, the present invention has been made in view of such a conventional problem, and by suppressing vibration using a miscellaneous wall, it can be applied even to a concrete structure while sufficiently exhibiting the vibration suppression effect. In addition, it can be easily retrofitted even in existing structures as well as new constructions and expansions, and it is also equipped with miscellaneous walls that can prevent the design plan of the structure from being restricted. The purpose is to provide a vibration control structure.
[0008]
[Means for Solving the Problems]
In order to achieve this object, a structure damping structure having a miscellaneous wall according to claim 1 of the present invention is provided in an opening portion of a main frame composed of columns and beams, and one side is fixed to the main frame side. A structure having a rough wall formed at a free end that is formed at a fixed end and the remaining three sides having a predetermined gap with the main frame side. A viscoelastic device formed separately from the miscellaneous wall and the main frame is provided between the free end of the main frame and the main frame, and the viscoelastic device is either the miscellaneous wall or the main frame A U-shaped bracket that is attached to the L-shaped bracket that is attached to either the other wall or the main frame, and one end of which is inserted into the U-shaped bracket, and the U-shaped bracket. And a viscoelastic material filled between one end of the L-shaped metal fitting, and the U-shaped metal fitting A bracket, the viscoelastic material, and a mounting bolt that penetrates the L-shaped bracket are attached to the miscellaneous wall or the main frame, and the through-hole of the L-shaped bracket of the mounting bolt is connected to the U-shaped bracket. A loose hole extending in the relative displacement direction following the relative displacement between the miscellaneous wall and the main frame, which allows relative movement with the L-shaped metal fitting, is formed .
[0009]
According to the structure for damping a structure having a miscellaneous wall according to the present invention, when vibration energy due to an earthquake or wind acts on the structure, the vibration is input to the miscellaneous wall via the main frame, and Relative displacement occurs between the free end and the main frame facing the free end. This relative displacement is input to the viscoelastic device between the free end of the miscellaneous wall and the main frame, and the U-shaped bracket and the L-shaped bracket of the viscoelastic device are relative to each other via the viscoelastic material. The input vibration is attenuated by the viscous deformation of the viscoelastic material.
In addition, since the U-shaped bracket and the L-shaped bracket are allowed to move relative to each other by the loose hole provided in the L-shaped bracket , both the U-shaped bracket and the L-shaped bracket follow the relative displacement between the miscellaneous wall and the main frame. By moving the metal fittings relative to each other, the viscoelastic material between the metal fittings can be viscously deformed, and input vibration can be attenuated.
[0010]
In addition, since the damping force proportional to the speed can be obtained by the viscous deformation (viscosity) of the viscoelastic material of the viscoelastic device, a damping effect can be expected from a small deformation of the structure, and it is input to the main frame. External force can be attenuated efficiently. For this reason, if it is a structure provided with the miscellaneous wall, even if it is a concrete structure with a small deformation amount, it can fully dampen.
[0011]
In addition, structures that adopt an earthquake-resistant structure generally have an earthquake-resistant slit (gap) between the miscellaneous wall and the main frame, so that the miscellaneous wall does not adversely affect the main frame . Since the viscoelastic device can be installed using the slit between the free end where this slit exists and the main frame , if it is a structure with miscellaneous walls, as well as new construction and expansion, the existing structure It can be easily retrofitted even on things.
[0012]
Furthermore, since the vibration damping structure of the present invention uses a miscellaneous wall provided in the structure, it is possible to avoid the restriction of the design plan of the structure due to the provision of the viscoelastic device, and the viscoelasticity can be freely set. Equipment installation planning is possible.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1 to 4 show an embodiment of a structure damping structure having a miscellaneous wall according to the present invention, FIG. 1 is a front view showing an arrangement state of the miscellaneous wall to which the damping structure is applied, and FIG. FIG. 3 is an enlarged cross-sectional view of a viscoelastic device, and FIG. 4 is an enlarged cross-sectional view from line AA in FIG.
[0014]
The basic structure of the vibration damping structure for a structure having a miscellaneous wall according to the present invention includes a miscellaneous wall 16 provided in an opening portion 14 surrounded by the pillar 10 and the beam 12, and one side E1 of the miscellaneous wall 16 is defined as the pillar 10 or A fixed end is fixed to the beam 12, and the remaining three sides E2, E3, and E4 are provided as a free end by providing a gap δ between the column 10 and the beam 12, and these three free ends are formed. A viscoelastic device 18 is provided outside at least one of the sides E2, E3, and E4 and the edge of the adjacent portion of the column 10 or the beam 12.
[0015]
That is, the structure of the present embodiment to which such a vibration damping structure is applied is an RC building 20 constructed as a multi-story apartment house as shown in FIG. A frame is constructed. In such an apartment house, there are many places where the miscellaneous wall 16 is provided in the opening part 14 surrounded by the pillar 10 and the beam 12. Although the bundle wall 16a, the waist wall 16b, and the sleeve wall 16c are shown as the miscellaneous wall 16 in FIG.
[0016]
The bundle wall 16a is disposed at the center portion of the opening portion 14, the lower end E1 of the fixed end is fixed to the lower beam 12, and a slit-like shape is formed between the upper side E3 of the free end and the upper beam 12. A gap δ is provided, and a widely opened gap δ is provided between the left and right sides E2 and E4 of the free end and the left and right columns 10 and 10.
[0017]
The waist wall 16b is disposed at the lower end of the opening portion 14, the lower end E1 of the fixed end is fixed to the lower beam 12, and the left and right sides E2, E4 of the free end and the left and right columns 10 are fixed. , 10 and a slit-like gap δ is provided between the upper end E3 of the free end and the upper beam 12, and a widely opened gap δ is provided.
[0018]
The sleeve wall 16c is disposed at the left and right ends of the opening portion 14, the lower end E1 of the fixed end is fixed to the lower beam 12, and the upper end E3 of the free end and the upper beam 12 and A slit-like gap δ is provided between one of the left and right sides E2 and E4 of the free end and one of the left and right columns 10, and the other of the left and right sides E2 and E4 and the left and right columns. A widely open gap δ is provided between the other 10 and the other.
[0019]
In addition, the hanging wall (not shown) is arranged at the upper end of the opening portion 14. In this case, the upper side of the fixed end is fixed to the upper beam 12, and the left, right and left sides of the free end are fixed. , A slit-like gap is provided between the right pillar 10 and a wide open gap is provided between the lower side of the free end and the lower beam 12.
[0020]
The miscellaneous wall 16 such as the bundle wall 16a, the waist wall 16b, the sleeve wall 16c, and the hanging wall may be constructed by on-site concrete using a conventional construction method, or a PC wall is used and is carried into the site and built. You may make it. When this PC wall is used, one side to be fixed is connected to the main frame by connecting a reinforcing bar with a sleeve joint or by welding using a plate.
[0021]
Here, as shown in FIG. 2, the corner between at least one side which is the free end of the miscellaneous wall 16 and the column 10 or the beam 12 facing this side, that is, the one side and the column 10 or By providing the viscoelastic device 18 outside the edge of the adjacent portion of the beam 12, a vibration damping structure is configured. That is, as shown in FIG. 1, the viscoelastic device 18 is provided between the upper side E3 and the upper beam 12 in the bundle wall 16a, and the left and right sides E2, E4 and the left and right columns 10 in the waist wall 16b. , 10 and between the upper side E3 and the upper beam 12 in the sleeve wall 16c. Further, in the hanging wall not shown, it is provided between the left and right sides and the left and right columns 10 and 10.
[0022]
As shown in FIG. 3, the viscoelastic device 18 includes a U-shaped bracket 21 formed of a steel material, and an L-shaped bracket 22 into which one end 22 a is inserted into the U-shaped bracket 21 so as to be relatively movable. The viscoelastic material 24 is filled between the U-shaped bracket 21 and the one end portion 22a of the L-shaped bracket 22. The viscoelastic material 24 has a high viscosity, and a large amount of energy is consumed when the U-shaped bracket 21 and the L-shaped bracket 22 are relatively moved.
[0023]
As shown in FIG. 2, the viscoelastic device 18 has a U-shaped metal fitting 21 that has an end portion 22 a of the L-shaped metal fitting 22 and a viscoelastic material 24 accommodated inside thereof, and is attached to pass through them. The bolt 26 is attached to the miscellaneous wall 16. On the other hand, the other end 22b of the L-shaped metal fitting 22 is attached to the upper beam 12 via an attachment bolt 28 as shown in the figure when the miscellaneous wall 16 is a bundle wall 16a. Of course, in the case of the sleeve wall 16c, the L-shaped bracket 22 is similarly attached to the upper beam 12. However, in the case of the waist wall 16a or the hanging wall, the viscoelastic device 18 is provided on both the left and right sides. Each L-shaped bracket 22 is attached to the left and right pillars 10 and 10, respectively.
[0024]
At this time, the mounting bolt 26 to which the U-shaped metal fitting 21 is attached penetrates the one end 22a of the L-shaped metal fitting 22 at the same time as it passes through the U-shaped metal fitting 21, but as shown in FIG. In the portion 22a, a loose hole 30 extending in the relative displacement direction following the relative displacement between the miscellaneous wall 16 and the main frame is formed in the penetration portion of the mounting bolt 26, and the U-shaped bracket 21 and the L-shaped bracket 22 are formed. Relative movement is allowed.
[0025]
In the vibration damping structure of the structure having the miscellaneous wall according to the present embodiment having the above configuration, the miscellaneous walls 16 such as the bundle wall 16a, the waist wall 16b, the sleeve wall 16c, and the hanging wall are the bundle wall 16a, the waist wall. In the wall 16b and the sleeve wall 16c, the lower side E1 serving as a fixed end is fixed to the lower beam 12, and in the case of a hanging wall, the upper side serving as the fixed end is fixed to the upper beam 12, and is caused by an earthquake or wind. When vibration energy acts on the RC building 20, vibration is input from the beams 12 fixed to each miscellaneous wall 16.
[0026]
On the other hand, the main frame of the RC building 20 is deformed by vibration, and the remaining three sides that become the free end of the miscellaneous wall 16 are relatively displaced between the column 10 and the beam 12 facing each other. The relative displacement amount at this time is input to the viscoelastic device 18, whereby the vibration energy of the RC building 20 can be absorbed.
[0027]
That is, when the viscoelastic device 18 is relatively displaced between the miscellaneous wall 16 and the column 10 and the beam 12, the U-shaped metal fitting 21 and the L-shaped metal fitting 22 cause the viscoelastic material 24 to undergo viscous deformation. Along with this, the viscoelastic material 24 is relatively moved, and a damping force is generated by the viscous deformation (viscosity) of the viscoelastic material 24, so that vibration energy is effectively absorbed and the RC building 20 can be damped. At this time, since the viscoelastic material 24 absorbs vibration energy by viscous deformation, a damping force is generated from a small input displacement, and a damping effect is exerted from a minute vibration to a large vibration. Even if the main frame has a small amount of deformation such as the building 20, the effect can be sufficiently obtained.
[0028]
By the way, in order to make the RC building 20 provided with the miscellaneous wall 16 an earthquake-resistant structure, in order to avoid the miscellaneous wall 16 from adversely affecting the column 10 and the beam 12, the miscellaneous wall 16, the column 10 and the beam 12, In general, an anti-seismic slit (gap δ) is provided between the two, and the viscoelastic device 18 can be attached using a corner portion where the slit exists. For this reason, if it is a structure provided with the miscellaneous wall 16 like this embodiment, it can be retrofitted easily even if it exists in the existing building as well as new construction and expansion.
[0029]
In addition, in the vibration damping structure of the present embodiment as described above, since the miscellaneous wall 16 provided in the RC building 20 is used, the design plan of the building 20 is restricted in order to provide the viscoelastic device 18. Therefore, it is possible to plan the installation of the viscoelastic device 18 freely.
[0030]
FIG. 5 is an enlarged cross-sectional view of a main part of a vibration damping structure showing another embodiment, and the same components as those in the above embodiment are denoted by the same reference numerals and redundant description is omitted.
[0031]
That is, in this embodiment, a viscoelastic device 18a having a simplified structure is provided. The viscoelastic device 18a includes a flat plate 32, an L-shaped metal fitting 34, and a viscoelastic material 36. 32, the viscoelastic material 36, and one end 34a of the L-shaped metal fitting 34 are superposed and attached to the miscellaneous wall 16 via an attachment bolt 26 penetrating them, and the other end 34b of the L-shaped metal fitting 34 is attached. It is attached to the beam 12 (which may be the column 10) via a mounting bolt 28. Of course, a loose hole extending in the relative displacement direction following the relative displacement between the miscellaneous wall 16 and the main frame is formed in one end portion 34a of the L-shaped metal fitting 34 at a portion through which the mounting bolt 26 passes. .
[0032]
Therefore, even in this embodiment, the relative displacement between the miscellaneous wall 16 and the beam 12 (column 10) causes the flat plate 32 and the L-shaped metal fitting 34 to move relative to each other, causing the viscoelastic material 36 to be viscously deformed. The vibration energy can be absorbed by the damping force generated in the above, and the same function as in the above embodiment can be exhibited.
[0033]
By the way, in each said embodiment, although the damping structure of this invention was demonstrated taking the example in RC building 20, it is said that this invention can be applied even if it is in SRC building and S building. Not too long. Further, the viscoelastic devices 18 and 18a are configured to include the U-shaped metal fitting 21, the L-shaped metal fitting 22, and the viscoelastic material 24 as shown in FIG. 2, and as shown in FIG. Although the case where it comprised with the flat plate 32, the L-shaped metal fitting 34, and the viscoelastic material 36 was disclosed, it is not restricted to this, The structure which can generate | occur | produce the vibration damping force by a highly viscous viscoelastic material effectively If it is.
[0034]
【The invention's effect】
As described above, in the vibration damping structure for a structure having a miscellaneous wall according to the present invention, the miscellaneous wall provided in the opening portion of the main frame composed of columns and beams is used. A viscoelastic device is provided in the gap formed between the end and the main frame, the U-shaped bracket of the viscoelastic device is attached to either the miscellaneous wall or the main frame, and the L-shaped bracket is mounted to the miscellaneous wall or the main frame. Attach to either one of the frames, and follow the relative displacement that occurs between the free end of the miscellaneous wall and the main frame to make the U-shaped and L-shaped brackets of the viscoelastic device elastically deform the viscoelastic material Therefore, the vibration control effect can be expected from the small deformation of the structure. Therefore, if it is a structure provided with a miscellaneous wall, even a concrete structure with a small amount of deformation can be sufficiently damped.
Moreover, since the U-shaped metal fitting, the L-shaped metal fitting and the viscoelastic material of the viscoelastic device are formed separately from the miscellaneous wall and the main frame, a miscellaneous wall having a gap between the main frame is provided. If it is a structure, it can be retrofitted easily even if it is an existing structure as well as a new construction and expansion.
In addition, since the structure is designed to suppress vibrations using the miscellaneous walls provided in the structure, it is possible to avoid restricting the design plan of the structure to provide the viscoelastic device, and to freely install the viscoelastic device. Planning becomes possible.
Further, since the relative movement between the U-shaped bracket and the L-shaped bracket is allowed by the loose hole, when the miscellaneous wall and the main frame are relatively displaced by the input of vibration, the U-shaped bracket is followed by the relative displacement. And the L-shaped metal fitting can be moved relative to each other, the viscoelastic material between the two metal fittings can be reliably viscoelastically deformed, and the input vibration can be efficiently damped.
[Brief description of the drawings]
FIG. 1 is a front view of an arrangement state of a miscellaneous wall to which a vibration damping structure showing an embodiment of the present invention is applied.
FIG. 2 is an enlarged cross-sectional view of a main part of a vibration damping structure showing an embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view of a viscoelastic device showing an embodiment of the present invention.
4 is an enlarged sectional view taken along line AA in FIG. 2 showing an embodiment of the present invention.
FIG. 5 is an enlarged cross-sectional view of a main part of a vibration damping structure showing another embodiment of the present invention.
[Explanation of symbols]
10 pillar 12 beam 14 opening 16 miscellaneous wall 16a bundle wall (miscellaneous wall)
16b Waist wall (Miscellaneous wall)
16c Sleeve wall (Miscellaneous wall)
18, 18a Viscoelastic device 20 RC building (structure)
δ Clearance

Claims (1)

A free end that is provided at the opening of the main frame consisting of columns and beams, with one side formed at the fixed end that is fixed to the main frame, and the remaining three sides leaving a predetermined gap with the main frame A structure for damping a structure with a miscellaneous wall formed in
Between the free end portion of the miscellaneous wall and the main frame, a viscoelastic device formed separately from the miscellaneous wall and the main frame is provided,
The viscoelastic device includes a U-shaped bracket attached to one of the miscellaneous wall or the main frame, and an U-shaped bracket attached to either the miscellaneous wall or the main frame, and the inside of the U-shaped bracket. An L-shaped metal fitting whose one end is inserted into a viscoelastic material filled between the U-shaped metal fitting and one end of the L-shaped metal fitting,
The U-shaped bracket is attached to the miscellaneous wall or the main frame by a mounting bolt penetrating the U-shaped bracket, the viscoelastic material, and the L-shaped bracket, and the L-shaped bracket of the mounting bolt The through-hole is formed in a loose hole extending in the relative displacement direction that follows the relative displacement between the miscellaneous wall and the main frame, allowing relative movement between the U-shaped bracket and the L-shaped bracket. Damping structure for structures with miscellaneous walls characterized by

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