JP2003321945A - Aseismic damper and aseismic structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aseismic damper and an aseismic structure using the same, in which a section of the damper buried in a concrete member is shortened and mounting thereof to the concrete member is carried out comparatively easily. <P>SOLUTION: The damper 12 comprises a low yield point steel plate 12a, a flange part 12b provided on each of both sides thereof, a vertical rib 12g provided on the outside of the flange part at the upper and the lower ends of the damper buried in the concrete, and a stud 16 mounted to project from the vertical rib. The upper and the lower ends of the damper are buried in the end parts of the concrete members 11, 13 extended from upper and lower beams 51A, 51B into the beam-column frame, and a main reinforcing bar 14 is arranged in the section surrounded by the vertical rib, an axial member and the outside of the flange part. The main reinforcing bar and the damper are structurally integrated with each other by the concrete. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control damper provided in a frame and a vibration control structure using the vibration control damper.

[0002]

2. Description of the Related Art A vibration control structure in which a stud type vibration control damper is incorporated in a frame has been conventionally known. For example, a base plate type as shown in FIG. 5 or an embedded column base as shown in FIG. A type of seismic damper is used. In FIG. 5, a concrete member 54 is provided so as to extend upward from the lower beam 51B, a damping damper 53 is arranged on an upper end surface of the concrete member 54, and a beam 51A above the damping damper 53 is arranged above. A concrete member 52 is provided so as to extend in the direction. Here, the vibration damper 53 is formed in an H-shaped or I-shaped cross-sectional shape with flanges 53d made of ordinary steel on both sides of the low yield point steel plate 53c, and base plates 5 made of ordinary steel at the upper and lower ends thereof.
3a and 53e are provided, and concrete members 52 and 54 are provided on the base plates 53a and 53e.
A nut 53b is screwed to the main bar 55 protruding from the.

The vibration damping damper 53 shown in FIG. 5 is arranged on the end faces of the concrete members 52 and 54, and the base plates 53a and 53e are wide and thick so that they are firmly fixed on the end faces and no slip occurs. Has been formed,
Therefore, the steel amount of the base plates 53a and 53e is the same as the low yield point steel plate 53c and the flange 53d, which are the main parts.
It can be said that the seismic damper 53 is uneconomical from this viewpoint. Moreover, when constructing the vibration control structure of FIG. 5, a reinforcing bar and a formwork are assembled on the lower beam 51B, and after the vibration control damper 53 is placed on this, concrete is poured and concrete is placed. The member 54 is formed. Therefore, since it is difficult for the concrete to wrap around the lower side of the base plate 53e, if high-fluidized concrete is used, or if a void is formed under the base plate 53e, it is necessary to fill the mortar after placing the concrete. However, there is a problem that the workability deteriorates.

Next, in FIG. 6, a concrete member 64 is erected on the lower beam 51B, a concrete member 62 is provided so as to extend downward from the upper beam 51A, and upper and lower end portions 63a of the vibration damper 63, 63d is embedded in each concrete member 62,64. When the shearing force Q acts on the structure in the vibration damping damper 63 as described above, the force is transmitted to the upper and lower end portions 63a and 63d of the vibration damping damper 63 by the bearing pressure of the concrete. There is a drawback that the embedding length becomes long.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and its object is to provide a seismic control system that can be mounted on a concrete member relatively easily. It is to provide a damper and a vibration control structure using the damper. Another object of the present invention is to provide a damping damper in which the length of a portion embedded in a concrete member is reduced as compared with a conventional damping damper, and a damping structure using the damping damper. Another object of the present invention is to provide a vibration control damper in which the thickness of the base plate is reduced as compared with the conventional vibration control damper, and a vibration control structure using the same.

[0006]

According to the invention of claim 1, flange portions are formed on both sides of a low yield point steel plate, and vertical ribs are formed outside the flange portions at upper and lower end portions embedded in concrete, There is provided a vibration damping damper characterized in that a shaft member is provided so as to project from the vertical ribs. The above-mentioned vibration control damper is arranged between the ends of the concrete member extending from the upper and lower beams into the beam frame, and the upper and lower ends of the vibration control damper are embedded in the concrete member. Since the vibration damping damper is provided with the vertical ribs and the shaft member, the main bar is arranged in a portion surrounded by the vertical ribs, the shaft member, and the outside of the flange portion to form the concrete member. , The main bar and the damping damper are integrated through concrete. Therefore, when interlayer deformation occurs in the structure, in addition to the bearing pressure from the concrete to the outside of the flange part, the force is transmitted from the main bar to the seismic damper via the concrete, so that the conventional embedded column base Compared with the type, the damping damper of the present invention can shorten the embedded length.

According to the second aspect of the present invention, flange portions are formed on both sides of the low yield point steel plate, vertical ribs are formed outside the flange portions at the upper and lower end portions embedded in concrete, and the concrete surface is provided outside the flange portions. There is provided a vibration damping damper characterized in that a lateral rib is formed at a location arranged in the vicinity thereof, and the lateral rib is provided with a through hole for inserting a reinforcing bar. Similarly to the above, the damping damper according to claim 2 is also one in which the upper and lower ends are respectively embedded in the concrete member, and the main ribs are inserted into the lateral ribs to form the concrete member, so that the interlayer deformation in the structure. If a force occurs, on the compression side, the force is transmitted to the seismic damper due to the bearing pressure on the horizontal rib and the flange embedded in the concrete, and on the tensile side, the force is applied from the main bar to the seismic damper via the lateral rib. Therefore, the vibration damping damper of the present invention can have a shorter embedded length as compared with the conventional embedded column base type. In the vibration damper of claim 2, the vertical rib transmits the force acting on the base plate to the flange portion, and acts to suppress the deformation of the base plate, thereby reducing the necessary thickness of the base plate. Is obtained.

In the inventions of claims 1 and 2, a low yield point steel plate is used, and the plastic deformation of the steel plate absorbs the energy of interlayer deformation of the structure, while the invention of claims 3 and 4 In the invention described above, one of a viscoelastic material, a rubber-like elastoplastic material, and a viscous material is sandwiched between the tip portions of the upper and lower steel plates, and the deformation absorbs energy. Further, in the vibration damping damper of claim 3, both end portions embedded in the upper and lower concrete members are configured similarly to those of claim 1, while in the vibration damping damper of claim 4, the upper and lower concrete members. Both ends embedded therein are constructed in the same manner as in claim 2.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a first embodiment of the present invention, (a) is a front view of a vibration control structure 10 provided with a vibration control damper 12, (b) is a cross-sectional view taken along line Ib-Ib, (c) Is Ic
-Ic is a sectional view taken along the line, and (d) is a sectional view taken along the line Id-Id. In FIG. 1, the vibration damping damper 12 has flange portions 12b formed on both sides of a low yield point steel plate 12a, and vertical ribs 12g formed on the outside of the flange portions in upper and lower end portions 12f embedded in concrete. A stud 16a or an L-shaped steel rod 16b is projectingly provided so as to extend to the outside of the flange portion. In FIG. 1, for the sake of explanation, while the stud 16a is provided so as to project from the upper vertical rib 12g and the outer side of the upper flange portion, the L-shaped steel rod 16b is fixed to the lower vertical rib 12g and the lower flange portion.
All have similar actions and effects, and which is applied can be appropriately selected. Low yield point steel plate 1
A buckling stiffening vertical rib 12d and a buckling stiffening lateral rib 12c are provided on the front and back sides of 2a to prevent the buckling in the out-of-plane direction by supplementing its rigidity. The upper and lower end portions 12f are made of ordinary steel, and have a low yield point steel plate 1
Horizontal ribs 12e are provided on the front and back sides at the boundary with 2a. Further, the vertical ribs 12g are formed to have substantially the same length as the upper and lower end portions 12f and have the same width over the entire length.

The vibration damper 12 is arranged between the concrete members 11 and 13 provided in the column beam structure. Here, in the upper and lower concrete members 11 and 13, the main bars are arranged from the upper and lower beams 51A and 51B toward the inside of the beam structure, and the upper end portion 12f and the lower end portion 12 of the vibration damper 12 are arranged.
f is arranged inside the shear reinforcement, and the outside of the flange portion and the stud 16a or the L-shaped steel rod 16b and the vertical rib 12 are provided.
The main bar 14 is inserted in a place surrounded by g, and the reinforcing bar, the upper end 12f and the lower end 12f of the vibration damper 12 are inserted.
Are embedded in concrete, and horizontal ribs 1
2e is located on the end surface of the concrete, and the end portion 14a of the main bar
A washer is mounted around the nut and a nut 15 is screwed and fixed to the end surface of the concrete. In addition, in FIG. 1, the ends of the main reinforcement 14 around which the shear reinforcing bar is wound and the main reinforcement 14 are illustrated so as to remain in the concrete members 11 and 13, but the lower ends of these are the beams 51, respectively.
Bars are arranged so as to extend to the inside of A and 51B.

In the above-mentioned vibration control structure 10, the vertical ribs 12g of the vibration control damper 12, the studs 16a, and the flange portion 1 are provided.
Since the main bar 14 is disposed and the concrete members 11 and 13 are formed in a portion surrounded by the outside of 2b, the main bar 14 and the vibration damping damper 12 transmit the force through the concrete. It is integrated like this. Therefore,
When interlayer deformation occurs in a structure provided with the above-described vibration control structure, a bearing pressure acts from the concrete of the concrete members 11 and 13 to the outside of the flange portion 12b, and the vibration control damper from the main bar 14 through the concrete. 1
Since the force is transmitted to 2, the embedded length of the upper and lower ends into the concrete can be shortened.

Next, FIG. 2 shows a second embodiment of the present invention, where (a) is a front view of a vibration control structure 20 provided with a vibration control damper 22, and (b) is a view taken along line IIb-IIb. Sectional view, (c)
It is sectional drawing which followed the IIc-IIc line. In FIG. 2, the vibration damping damper 22 has flange portions 22b formed on both sides of a low yield point steel plate 22a, and vertical ribs 22 are formed on the outside of the flange portion 22b in upper and lower end portions 22f embedded in concrete.
g is formed, and a lateral rib 22h is formed at a location arranged near the concrete surface on the outside of the flange portion 22b. The lateral rib 22h is provided with a through hole for inserting the main bar 24. Here, a buckling stiffening vertical rib 22d and a buckling stiffening lateral rib 22c are provided on the front and back of the low yield point steel plate 22a to prevent the buckling in the out-of-plane direction by supplementing its rigidity. There is. The upper and lower ends 22f are made of ordinary steel, and horizontal ribs 22e are provided on the front and back sides at the boundary with the low yield point steel plate 22a. The vertical rib 22g is made of a steel plate, and two sides thereof are the horizontal ribs 2.
It is fixed to 2e and the flange portion 22b.

In FIG. 2, the concrete member 21 is formed to extend downward from the upper beam 51A, while the concrete member 23 is formed to extend upward from the lower beam 51B. A large space is provided between the lower end surface of the member 21 and the upper end surface of the concrete member 23, and the vibration control damper 22 is installed in this space to configure the vibration control structure 20. In each of the concrete members 21 and 23, main reinforcements and shear reinforcements are arranged from the upper and lower beams 51A and 51B toward the inside of the beam structure, and the upper end 22f and the lower end 22f of the vibration damper 22 are inside the shear reinforcements. The main rib 24 is inserted into the through hole of the horizontal rib 22h.
The upper end portion 22f and the lower end portion 22f of No. 2 are respectively embedded in concrete, the horizontal ribs 22h are located on the end face of the concrete, the washer is attached to the end portion 24a of the main bar, and the nut 25 is screwed. Fixed to the end face of concrete.

In the above-mentioned vibration control structure 20, since the main reinforcement 24 is inserted into the horizontal rib 22h reinforced by the vertical rib 22g and the vibration control damper 22 is fixed to the concrete members 21 and 23, interlayer deformation occurs in the structure. In this case, on the compression side, the force is transmitted to the seismic damper 22 by the bearing pressure on the horizontal rib 22h and the flange portion 22b embedded in the concrete, and on the tension side, the main rib 24 extends from the horizontal rib 22h and the vertical rib 2
Since the force is transmitted to the seismic damper 22 via 2g,
The embedded length of the vibration damper 22b, that is, the upper end portion 2
2f and the lower end 22f can be shortened.

FIG. 3 shows a third embodiment of the present invention.
(A) is a front view of the vibration control structure 30 provided with the vibration control damper 32, (b) is a sectional view taken along line IIIb-IIIb. Figure 3
In, the vibration damper 32 includes an upper member that extends upward from the steel plate 32a and a lower member that extends downward from the steel plate 32c, and both members are integrated by sandwiching the viscoelastic body 32d between the steel plate 32a and the steel plate 32c. Is formed in. The upper member and the lower member have flange portions 32b formed on both sides of the steel plate 32a excluding the tip end portion for sandwiching the viscoelastic body 32d, and vertical ribs are formed outside the flange portion 32b at a portion embedded in concrete. 12 g is formed, and a stud 16 is provided so as to project from the vertical rib. The vibration damper 32 is arranged on the concrete members 11 and 13 in the same manner as in the first embodiment. In addition,
In the third embodiment and the fourth embodiment described next, the viscoelastic bodies 32d and 42d are sandwiched between the tip portions of the upper and lower steel plates, and the elastic deformation absorbs energy. The first and second embodiments are low yield point steel plates 12
a and 22a are used to absorb the energy of interlayer deformation of the structure by the plastic deformation, and the third embodiment adopts the same configuration as that of the first embodiment for the other parts. The fourth embodiment employs the same configuration as the second embodiment. Therefore, the same configurations are denoted by the same reference numerals and the description thereof is omitted, and different portions are denoted by new reference numerals and described. Further, in the third and fourth embodiments, the transmission and effect of the force from the concrete member to the seismic damper are the same as those in the third and fourth embodiments, respectively, and therefore the description thereof will be omitted.

FIG. 4 shows a fourth embodiment of the present invention. FIG. 4A shows a vibration control structure 4 provided with a vibration control damper 42.
0 is a front view, and (b) is a sectional view taken along line IVb-IVb. In FIG. 4, the vibration damping damper 42 includes an upper member that extends upward from the steel plate 42a and a lower member that extends downward from the steel plate 42c. Both members include the steel plate 42a and the steel plate 42c.
The viscoelastic body 42d is sandwiched between and is integrally formed. The upper member and the lower member have flange portions 42b formed on both sides of the steel plate 42a excluding the tip end portion for sandwiching the viscoelastic body 42d, and outside the flange portion 22b in the upper and lower end portions 22f embedded in concrete. A vertical rib 22g is formed on the outside of the flange portion 22b, and a horizontal rib 22h is provided on the outside of the flange portion 22b near the concrete surface.
Is formed, and a through hole for inserting the main bar 24 is provided in the lateral rib 22h. The vibration damper 42 is installed on the concrete members 21 and 23 in the same manner as the vibration damper 22 in the second embodiment.

[0017]

The seismic damper of the present invention is provided with vertical ribs on the outside of the flange at the upper and lower ends, and the shaft member is projected from the vertical rib. Therefore, the vertical rib, the shaft member and the outside of the flange are provided. If a main bar is placed in the area enclosed by and to form a concrete member, the force will be transmitted from the main bar to the seismic damper through the concrete, so the embedded length at the upper and lower ends can be shortened. Therefore, the base plate such as the conventional vibration damper is not necessary. Therefore, the vibration control damper of the present invention is easier to handle at the time of construction, and the amount of steel material is reduced and the material cost is also reduced, as compared with the conventional embedded column base type.

Further, in the vibration control damper of the present invention, since the vertical ribs are formed on the outer sides of the flange portions at the upper and lower ends and the horizontal ribs are formed on the outer sides of the flange portions, the reinforcing bars are inserted into the through holes of the horizontal ribs. If a concrete member is formed by using the horizontal ribs and the flanges embedded in the concrete, the force will be transmitted to the seismic control damper, and at the same time the main bar will exert force on the seismic control damper via the lateral ribs and the vertical ribs. Is transmitted, the embedded length at the upper and lower ends can be shortened, and a base plate such as a conventional vibration damper is not required. Therefore, the seismic control damper of the present invention is easier to handle during construction, the amount of steel is reduced, and the material cost is also reduced, as compared with the conventional embedded column base type and base plate type.

[Brief description of drawings]

1 is a front view, (b) is a cross-sectional view taken along line Ib-Ib, and (c) is line Ic-Ic. Sectional view along (d) Id-Id
It is sectional drawing which followed the line.

FIG. 2 is a vibration control structure provided with a vibration control damper of a mode different from that of FIG. 1, (a) is a front view, (b) is a cross-sectional view taken along line IIb-IIb, and (c) is IIc. FIG. 11 is a cross-sectional view taken along the line IIc.

FIG. 3 shows a vibration control structure provided with a vibration control damper of a mode different from that of FIGS. 1 and 2, (a) being a front view and (b) being II.
It is sectional drawing which followed the Ib-IIIb line.

FIG. 4 is a vibration control structure provided with a vibration control damper of a mode different from that of FIGS. 1 to 3, in which (a) is a front view and (b) is IV.
It is sectional drawing which followed the b-IVb line.

FIG. 5 is a front view showing a conventional example.

FIG. 6 is a front view showing a conventional example.

[Explanation of symbols]

10, 20, 30, 40 Damping structure 11,21 Upper concrete member 12, 22, 32, 42 Seismic damper 13,23 Lower concrete member 14,24,34,44 12a, 22a Low yield point steel plate 12b, 22b, 32b, 42b Flange part 32d, 42d viscoelastic body 16 studs 12g, 22g vertical ribs 22h horizontal rib 51A, 51B beams

Claims (6)

[Claims] 1. A flange portion is formed on both sides of a low yield point steel plate, vertical ribs are formed outside the flange portion at upper and lower end portions embedded in concrete, and a shaft member is provided so as to project from the vertical rib. Damping damper characterized by that. 2. Flanges are formed on both sides of a low yield point steel plate, vertical ribs are formed on the outside of the flange at the upper and lower ends embedded in concrete, and the ribs are provided on the outside of the flange near the concrete surface. A vibration damping damper characterized in that a lateral rib is formed and a through hole for inserting a reinforcing bar is provided in the lateral rib. 3. A viscoelastic material, a rubber-like elastoplastic material, or a viscous material (hereinafter sometimes referred to as a viscoelastic material) is sandwiched between the tips of the upper member and the lower member. Then
A damping damper in which the upper end of the upper member and the lower end of the lower member are each embedded in concrete,
The upper member has flange portions formed on both sides of the steel plate excluding the tip end portion that sandwiches the viscoelastic body, etc., and vertical ribs are formed outside the flange portion at the upper end portion embedded in concrete, and protrude from the vertical ribs. A shaft member is provided so that the lower member has flange portions formed on both sides of the steel plate excluding the tip end portion for sandwiching the viscoelastic body, etc., and the flange portion outside at the lower end portion embedded in concrete A vibration damping damper, wherein a vertical rib is formed on the shaft, and a shaft member is provided so as to project from the vertical rib. 4. A viscoelastic material, a rubber-like elastoplastic material, or a viscous material (hereinafter sometimes referred to as a viscoelastic material or the like) is sandwiched between the tip portions of the upper member and the lower member. Then
A damping device in which the upper end of the upper member and the lower end of the lower member are each buried in concrete, wherein the upper member is on both sides of the steel plate excluding the tip for holding the viscoelastic body or the like. Each of the flange portions is formed, a vertical rib is formed outside the flange portion of the upper end portion which is embedded in concrete, and a horizontal rib is formed at a position arranged near the concrete surface outside the flange portion. Through-holes are provided for inserting the lower member, and the lower member is formed with flange portions on both sides of the steel plate excluding the tip portion for sandwiching the viscoelastic body and the like, and the flange of the lower end portion is embedded in concrete. Vertical ribs are formed on the outside of the flange, horizontal ribs are formed on the outside of the flange near the concrete surface, and the horizontal ribs are provided with through holes for inserting the reinforcing bars. Vibration Control damper and said. 5. The concrete member according to claim 1 or 3, wherein a concrete member is provided so as to extend downward from the upper beam in the column beam structure, and a concrete member is provided so as to extend upward from the lower beam. A seismic damper is a seismic control structure provided between both concrete members, wherein the upper end of the seismic damper is embedded in the upper concrete member,
The lower end of the vibration damper is embedded in the lower concrete member, and a main bar is arranged in the upper and lower concrete members at a location surrounded by the outer flange portion, the shaft member, and the vertical rib. A damping structure characterized by being stiffened. 6. The concrete member according to claim 2 or 4, wherein a concrete member is provided so as to extend downward from an upper beam and a concrete member is provided so as to extend upward from a lower beam in the column beam structure. A seismic damper is a seismic control structure provided between both concrete members, wherein the upper end of the seismic damper is embedded in the upper concrete member,
A lower end portion of the vibration damping damper is embedded in a lower concrete member, and main bars of the upper and lower concrete members are inserted into and fixed to the through holes of the lateral ribs. .