JP2008045326A - Vibration proof damper structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration proof damper structure, easy in construction, usable for both span and column spacing, and easily installing and replacing a steel material for a damper. <P>SOLUTION: A pair of steel frame materials 1 and 1 arranged with a predetermined clearance in the axial direction, are joined by the steel material 5 for the damper having yield strength lower than the steel frame materials 1 and 1. Stiffening materials 6 and 6 are respectively fixed to both side parts of the steel material 5 for the damper. The steel frame materials 1 and 1 are joined by the steel material 5 for the damper via the stiffening materials 6 and 6 by joining these stiffening materials 6 and 6 to the steel frame materials 1 and 1 by bolts. Thus, the vibration proof damper structure is easily constructed, and can also be used for both span and column spacing, and the steel material for the damper is easily installed and replaced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration damper structure attached to a main frame composed of columns and beams such as a reinforced concrete structure and a steel frame structure.

As an example of a damping damper structure that absorbs energy input to a structure during an earthquake as hysteresis energy due to plastic deformation and prevents or reduces the destruction of the structure, the one described in Patent Document 1 is known.
This has a plurality of main panels in which openings are formed in a web of an H-shaped cross-section steel material, and small panels made of a steel plate having a yield strength lower than that of the H-shaped cross-section steel material are attached to the openings. A steel seismic wall connected in a direction, wherein stiffening plates are disposed on both sides of the small panel, and the stiffening plate and the small panel are restrained by bolts, nuts, or the like. Is.
According to such a structure, when a large earthquake occurs, the steel shear wall yields and absorbs the seismic energy before the structural framework, so that plasticization and fatigue damage of the structure can be reduced. At this time, since the stiffening plate is provided on the small panel attached to the opening to improve the buckling strength, the local distortion is reduced only by causing small buckling deformation or small local buckling on the small panel. In addition, the fatigue characteristics can be improved and the seismic performance can be improved.
Japanese Patent Laid-Open No. 11-181920

By the way, the main panel constituting a part of the vibration damper structure is provided with an opening in the web of the H-shaped cross-section steel material, and a small panel made of a steel plate having a yield strength lower than that of the H-shaped cross-section steel material is attached to the opening. Therefore, it takes time to provide the opening in the web of the H-shaped cross-section steel material, and therefore, it takes time to construct the damping damper structure.
Further, the main panel is provided between the upper and lower beams and has a structure that is long in the vertical direction. Therefore, it is difficult to provide the main panel between the columns in the short span boundary beam portion.
In addition, a small panel made of steel plate with low yield strength is joined to the opening of the main panel by welding, so if the small panel breaks due to an earthquake, this small panel is removed and a new small panel is joined again. It takes time and effort.

  The present invention has been made in view of the above circumstances, and provides a vibration damper structure that is easy to construct, can be used between both beams and columns, and can easily mount and replace damper steel. The challenge is to do.

  In order to solve the above problems, the invention according to claim 1 is a pair of steel frames arranged with a predetermined gap in the axial direction as shown in FIGS. 1 to 3 and (FIGS. 8 to 10). 1, 1 is characterized by being joined by a steel material 5 (20) for damper having a yield strength lower than that of the steel frames 1 and 1.

  The steel frame is configured as a part of a beam material along the horizontal direction or a column material along the vertical direction, and when arranged horizontally, one end is fixed to the column or wall, and when arranged vertically One end is fixed to the beam or floor slab.

According to invention of Claim 1, since a pair of steel frame material is joined by the steel material for dampers whose yield strength is lower than this steel frame material, an opening part is formed in the web of an H-shaped section steel material like usual. There is no need to provide it, and the damper steel material may be joined to the pair of steel frames by bolting, welding, or the like. Therefore, construction of the vibration damper structure is facilitated.
Further, even between the columns in the short span boundary beam portion, the boundary beam may be configured by a pair of left and right steel frames and a steel material for a damper that joins these steel frames, so that it can be easily used between columns. Moreover, since the part used as a stud should just be comprised with a pair of upper and lower steel frames and the steel material for dampers which joins these steel frames between beams, it can utilize easily also between beams.
Furthermore, by adjusting the width and thickness of the steel material for the damper, the proof stress and rigidity of the damping damper structure can be easily adjusted to the optimum one.

  According to a second aspect of the present invention, in the damping damper structure according to the first aspect, the stiffeners 6 and 6 are fixed to both sides of the damper steel material 5, respectively. Are joined to the steel frames 1 and 1 by bolts, whereby the pair of steel frames 1 and 1 are joined by the damper steel material 5 via the stiffeners 6 and 6.

  According to invention of Claim 2, since the stiffener fixed to the both sides of the steel material for dampers is bolted to the steel frame material, when the steel material for dampers is damaged by an earthquake, this steel material for dampers Can be easily removed and replaced by removing the bolt of the stiffener. Moreover, since the bolts are also tightened at the time of removal and replacement, vibration and noise associated with the replacement can be reduced.

  According to a third aspect of the present invention, in the damping damper structure according to the first or second aspect, the reinforcing ribs 9, 9 (21, 21) for improving the buckling strength are fixed to the damper steel material 5 (20). It is characterized by being.

  According to the invention described in claim 3, since the buckling strength of the damper steel material is improved by the reinforcing rib, the damper steel material only causes a small buckling deformation or a small local buckling in the event of an earthquake. Strain is reduced, fatigue characteristics are further improved, and seismic performance can be enhanced.

According to the present invention, the pair of steel frames disposed with a predetermined gap in the axial direction are joined by the steel for damper having a yield strength lower than that of the steel frame, so that the construction of the vibration damper structure is facilitated. At the same time, between the columns and between the beams, a pair of left and right steel frames and a damper steel material that joins these steel frames can be used easily.
In addition, since the stiffeners fixed on both sides of the damper steel are bolted to the steel frame, if the damper steel is damaged by an earthquake, it can be easily Can be removed and replaced.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 to 3 show a first example of a damping damper structure according to the present invention. FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view taken along line AA in FIG. is there.

In these drawings, reference numerals 1 and 1 denote steel cantilevers (steel frames). These steel cantilevers 1, 1 are arranged with a predetermined gap in the axial direction. The steel cantilever 1 includes an H-shaped steel material 2 and a bracket 3 formed at the base end of the H-shaped steel material 2 so that the bracket 3 is fixed to a column, a wall, or the like. It has become.
The webs 2 a and 2 a of the H-shaped steel materials 2 and 2 are joined together by a damper steel material 5 having a yield strength lower than that of the H-shaped steel material 2.

That is, the damper steel 5 is a rectangular plate formed of low yield point steel, and a stiffener 6 is fixed to the side end along the short side by welding. The stiffener 6 is formed of an L-shaped angle member, and one piece of the stiffener 6 is fixed to the side end of the damper steel 5 by welding. Further, the other piece of the stiffener 6 is in contact with the web 2 a and is bolted by a plurality of bolts 7 and nuts 8. Therefore, the steel cantilever beams 1 and 1 are joined by the damper steel material 5 via the stiffeners 6 and 6.
Reinforcing ribs 9, 9 for improving buckling strength are fixed by welding to both end portions along the long side of the steel material 5 for damper. The reinforcing rib 9 is formed in a strip shape, and both ends thereof extend to the other piece of the stiffener 6 and are fixed to the other piece by welding.
As described above, the damper steel material 5, the stiffeners 6 and 6, and the reinforcing ribs 9 and 9 are integrally formed to constitute the damping damper portion 10. For example, in a factory or the like, these may be integrated by welding to form the vibration damper part 10, or may be integrated by welding in the field to form the vibration damper part 10.

  In the above-described vibration damper structure, one steel cantilever 1, the vibration damper 10 and the other steel cantilever 1 are continuous, and the vibration damper 10 is cantilevered by bolts. Since it is joined to the beams 1 and 1, it has relatively high rigidity, supports horizontal force, and restrains in-plane bending. For this reason, when the damping damper structure receives a large horizontal force during an earthquake, the damper steel material 5 having a low yield strength of the damping damper portion 10 yields before the framework such as the steel structure and absorbs hysteresis energy, The main frame can be kept in a healthy state by reducing plasticization and fatigue damage.

As shown in FIG. 4, the damping damper structure having the above-described configuration is used as a short span boundary beam in the middle hallway portion in a plate-type building of the middle hallway type.
That is, FIG. 4 is a plan view showing a schematic configuration of a plate-like building, where reference numerals 11a and 11b indicate columns, and reference numerals 12a and 12b indicate beams. This plate-like building includes a first frame 13 composed of pillars 11a and beams 12a, and a second frame 14 composed of columns 11b and beams 12b. The frame 14 is arranged at a predetermined interval, and an inner corridor 15 is provided at this interval.
The first frame 13 and the second frame 14 are connected by the vibration damper structure according to the present invention.
That is, a damping damper structure including a damping damper portion 10 is disposed in a portion of the inner corridor 15 that becomes a short span boundary beam, and one of the steel cantilever beams 1 and 1 of the damping damper structure is disposed. The first frame 13 is fixed to the column 11a, and the other is fixed to the second frame 14 column 11b. When the steel cantilever beams 1 and 1 are fixed to the columns 11a and 11b, the bracket 3 (see FIG. 1) of the steel cantilever beam 1 is brought into contact with the columns 11a and 11b and joined by bolts 3a.

Further, as shown in FIG. 5, the vibration damper structure is used as a short-span boundary beam connecting the core wall and the core wall in a core wall type building.
That is, FIG. 5 is a plan view showing a schematic configuration of a core wall type building. Reference numeral 16 denotes a column, reference numeral 17 denotes a beam, and reference numeral 18 denotes a core wall. The core wall 18 is formed in an L shape in plan view, and is disposed at a predetermined interval at a substantially central portion of the building so as to form a square core in plan view.
And the adjacent core walls 18 and 18 are connected by the damping damper structure which concerns on this invention.
That is, a damping damper structure including a damping damper portion 10 is disposed in a portion that becomes a short span boundary beam that connects the core wall 18 and the core wall 18, and the steel cantilever beam 1 of the damping damper structure, One of the two is fixed to one core wall 18 and the other is fixed to the other core wall 18. When the steel cantilever beams 1 and 1 are fixed to the core walls 18 and 18, the bracket 3 (see FIG. 1) of the steel cantilever beam 1 is brought into contact with the core walls 18 and 18 and joined by bolts 3a.

According to the present embodiment, since the pair of steel cantilevers 1 and 1 are joined via the stiffeners 6 and 6 by the damper steel material 5 having a yield strength lower than that, There is no need to provide an opening in the web of the H-shaped cross section steel material, and the damper steel material 5 may be bolted to the pair of steel cantilever beams 1 and 1 via the stiffeners 6 and 6. Therefore, construction of the vibration damper structure is facilitated.
Also, between the pillars 11a and 11b in the short span boundary beam portion, the boundary beam is a pair of left and right steel cantilevers 1 and 1, and a damper steel 5 that joins these steel cantilevers 1 and 1; Since it only has to be constituted by the stiffeners 6 and 6, it can be easily used between the columns 11a and 11b. In addition, even between the beams, the portion serving as the stud may be constituted by a pair of upper and lower steel frames, a damper steel material 5 that joins these steel frames, and the stiffeners 6 and 6, so that it can be easily used between the beams. .

Further, since the stiffeners 6 and 6 fixed to both sides of the damper steel material 5 are bolted to the steel cantilever beams 1 and 1, if the damper steel material 5 is damaged by an earthquake, this damper The steel material 5 can be easily removed and replaced by removing the bolts 7 of the stiffeners 6 and 6. Moreover, since the bolts are also tightened at the time of removal and replacement, vibration and noise associated with the replacement can be reduced.
In addition, since the reinforcing ribs 9 and 9 for improving the buckling strength are fixed to the damper steel material 5, the buckling strength of the damper steel material 5 is improved by the reinforcing ribs 9 and 9. Accordingly, in the event of an earthquake, the steel material 5 for dampers only has a small buckling deformation or a small local buckling, so that the local strain is reduced, the fatigue characteristics are further improved, and the seismic performance can be enhanced.

Further, the damper 10 having the damper steel 5, the stiffener 6 and the reinforcing rib 9 integrated with each other and the steel cantilever beams 1 and 1 fixed to the frame such as a column or wall are independent members. Therefore, it is possible to install them separately and increase the degree of freedom of construction.
Further, by adjusting the width and thickness of the damper steel material 5, the proof stress and rigidity of the damping damper structure can be easily adjusted to an optimum one.
In addition, if a discrepancy occurs between the steel cantilevers 1 and 1 on both sides due to building deformation after a large earthquake, it can be easily adjusted by interposing plates between them.
Furthermore, normally, when joining H-shaped steel materials, the webs and flanges are joined by splice plates, but in this embodiment, the flanges 2b and 2b of the H-shaped steel materials 2 and 2 are not joined. Therefore, the material and labor can be reduced, and the cost can be greatly reduced.
Further, by not connecting the flanges, the moment becomes constant, the movement of the inflection point is eliminated, and the members of the steel cantilever 1 can be reduced.

(Second Embodiment)
6 and 7 show a second example of the vibration damper structure according to the present invention. FIG. 6 is a plan view and FIG. 7 is a plan sectional view.
The damping damper structure shown in these drawings differs from that shown in FIGS. 1 to 3 in that a damping damper portion 10 in which a steel material 5 for a damper, a stiffener 6 and a reinforcing rib 9 are integrated is a steel frame. This is a point arranged on both sides of the cantilever beams 1 and 1, and other configurations are common, and therefore, common portions are denoted by the same reference numerals and description thereof is omitted or simplified.

The two damping damper parts 10 and 10 in which the damper steel material 5, the stiffener 6 and the reinforcing rib 9 are integrated are arranged on both sides of the webs 2a and 2a of the H-shaped steel material 2 and are arranged with the web 2a interposed therebetween. The stiffeners 6, 6 are fixed to the web 2 a by bolts 7 and nuts 8. Therefore, the steel cantilever beams 1, 1 arranged with a predetermined gap are joined together by the two damper steel members 5, 5 via the stiffeners 6.
As described above, in the present embodiment, the same effect as that of the first embodiment can be obtained, and since the number of the damper steel materials 5 is two, the proof stress and rigidity of the damping damper structure can be increased. it can.
Moreover, since the steel materials 5 and 5 for dampers are arrange | positioned symmetrically with respect to the steel cantilever beams 1 and 1, the structural balance property is excellent.

(Third embodiment)
8 to 10 show a third example of the vibration damper structure according to the present invention. FIG. 8 is a side view, FIG. 9 is a plan view, and FIG. 10 is a sectional view taken along line BB in FIG. is there.
In the present embodiment, a pair of steel cantilever beams 1, 1 arranged with a predetermined gap in the axial direction are directly joined by a damper steel material 20 having a yield strength lower than that of the steel cantilever beams 1, 1. . In addition, the same code | symbol is attached | subjected to 1st Embodiment and a common part, and the description is abbreviate | omitted or simplified.
In FIG. 1 to FIG. 3, the steel cantilever beams 1, 1 are joined by the damper steel material 5 via the stiffeners 6, 6, but in this example, the dampers 6, 6 are not used and the dampers are used. The steel material 20 is fixed to the webs 2a and 2a of the steel cantilever beams 1 and 1 by direct welding.
Further, the damper steel material 20 has a longer left and right length than the damper steel material 5, and is directly welded to the webs 2a and 2a at the site. Further, reinforcing ribs 21 and 21 for improving the buckling strength are fixed to the side end portions along the long side of the damper steel material 20 by welding. The reinforcing ribs 21 and 21 are fixed to the damper steel material 20 by a factory in advance.

In the present embodiment, as in the first embodiment, the pair of steel cantilever beams 1 and 1 are joined by the damper steel material 20 having a yield strength lower than that of the pair of steel cantilevers 1 and 1. There is no need to provide an opening in the web of the section steel material, and the damper steel material 20 may be joined to the pair of steel cantilevers 1 and 1. Therefore, construction of the vibration damper structure is facilitated.
Also, between the columns 11a and 11b in the short span boundary beam portion, the boundary beam is composed of a pair of left and right steel cantilever beams 1 and 1 and a damper steel material 20 that joins these steel cantilever beams 1 and 1. Since it should just be comprised, it can utilize easily also between pillar 11a, 11b. Moreover, since the part used as a stud should just be comprised between a pair of upper and lower steel frames, and the steel material 20 for dampers which joins these steel frames between beams, it can utilize easily also between beams.

FIG. 1 is a side view showing a first example of a vibration damper structure according to the present invention. FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a top view which shows schematic structure of the plate-shaped building provided with the damping damper structure. It is a top view which shows schematic structure of the building of a core wall type provided with the damping damper structure. The 2nd example of the damping damper structure concerning the present invention is shown, and it is the top view. FIG. FIG. 3 is a side view showing a third example of the vibration damper structure according to the present invention. FIG. FIG. 9 is a sectional view taken along line BB in FIG.

Explanation of symbols

1 Steel cantilever (steel frame)
5,20 Steel material for damper 6 Stiffener 7 Bolt 9,21 Rib for reinforcement

Claims (3)

  A vibration damper structure characterized in that a pair of steel frames arranged with a predetermined gap in the axial direction are joined by a damper steel material having a yield strength lower than that of the steel frames.   Stiffeners are fixed to both sides of the damper steel, and the stiffeners are bolted to the steel frame, so that the pair of steel frames are connected to the damper steel via the stiffener. The damping damper structure according to claim 1, wherein the damping damper structure is joined.   The damping damper structure according to claim 1 or 2, wherein a reinforcing rib for improving buckling strength is fixed to the steel material for damper.

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