JP3783133B2 - Boundary beam damper and arrangement method of boundary beam damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boundary beam damper capable of rationally suppressing vibration in an RC structure without obstructing a space in a building.
[0002]
[Prior art]
Currently, a structure using an RC core wall 2 as shown in FIG. The adoption of RC core wall 2 enhances the seismic performance of the building and absorbs building energy by bridging the boundary beam 8 incorporating the damping damper 4 in the center of the RC core wall 2 opening. It has the effect of improving ability.
[0003]
[Problems to be solved by the invention]
However, it is conceivable that the number of locations provided in the opening of the RC core wall 2 is limited in structure, and a sufficient vibration control effect is often not obtained.
[0004]
In view of the above circumstances, an object of the present invention is to provide a boundary beam damper that can rationally suppress vibrations in an RC structure without obstructing a space in a building.
[0005]
[Means for Solving the Problems]
The boundary beam damper according to claim 1 is a short-span boundary beam damper in which a damping damper is incorporated in a boundary beam spanned between adjacent vertical members, and the vertical beam is extended from the side of one vertical member to the other vertical beam. A bracket made of reinforced concrete that is horizontally disposed so as to protrude toward the member, a steel damper to which one end is fixed in the horizontal direction of the end of the bracket, and a portion near the end of the bracket. One end is fixed to the lower part, and it is composed of a viscous damper arranged coaxially with respect to the vertical axis, and the other end of the steel damper is fixed to the side of the other vertical member In addition, the other end of the viscous damper is fixed to a horizontal member spanned between adjacent vertical members below the bracket.
[0006]
The boundary beam damper according to claim 2 is arranged so as to bridge between the vertical members adjacent to each level with respect to the vertical member continuously provided in the vertical axis direction of the building composed of a plurality of levels. A plurality of the short-span boundary beam dampers are horizontally arranged at a predetermined interval, and the arrangement positions of the steel dampers and the viscous dampers incorporated in the boundary beam dampers are staggered alternately on the left and right for each layer, The brackets constituting the boundary beam damper are alternately arranged on the side of one vertical member and the side of the other vertical member for each layer, and the other end of the viscous damper is below the bracket. It is characterized in that it is fixed to the upper surface of the bracket of the boundary beam damper arranged at the top.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a boundary beam damper according to the present invention will be described with reference to FIGS. 1 to 3.
[0008]
As shown in FIG. 1, the boundary beam damper 1 of the present invention is effectively used as a short span beam in a portion where the span between adjacent vertical members is short. As an installation example, in the super high-rise RC apartment house 8 using the RC core wall 2, the RC core wall 2 is used as a short span beam connecting the RC core wall 2 to each other, the RC core wall 2 and the pillar, or the pillar and the pillar. In the present embodiment, a case where the present invention is applied to the RC core walls 2 will be described in detail as an example.
[0009]
The RC core wall 2 over which the boundary beam damper 1 is bridged has the above-mentioned super high-rise structure in which the outer wall of the entire building has a tubular frame composed of a reinforced concrete outer frame frame 11 composed of an outer column 9 and an outer column 10. Located in the central part of the RC apartment house 8.
[0010]
The RC core wall 2 has high rigidity composed of a series of on-site cast-in-place reinforced concrete associative seismic walls that extend from the lowest layer to the highest layer of the super high-rise RC apartment house 8. The RC core wall 2 is provided so as to surround the central portion of the super high-rise RC apartment house 8. In this embodiment, an elevator, a staircase, etc. are provided inside the RC core wall 2 so that it can be used as a common zone 12. The RC core wall 2 is divided into four planes.
[0011]
Further, as shown in FIG. 2, boundary beam dampers 1 are horizontally installed between the divided RC core walls 2 with a predetermined interval for each layer. The boundary beam damper 1 includes a bracket 3 provided on the side of the RC core wall 2, a steel damper 5 incorporated in the bracket 3, and a viscous damper 6.
[0012]
As shown in FIG. 3, the bracket 3 is made of reinforced concrete similar to the RC core wall 2 and is integrally provided on the side of one RC core wall 2a adjacent to each other across the opening, It is arranged horizontally so as to protrude toward the RC core wall 2b.
[0013]
The steel damper 5 is fixed to the end of the bracket 3 in the horizontal direction. The steel damper 5 is generally used as a damper that absorbs vibration energy by utilizing plastic deformation of the steel material. The larger the response displacement, the higher the damping performance. In the present embodiment, the steel damper 5 uses a steel beam such as H-shaped steel, and is fixed horizontally to the end of the bracket 3 so that one end is embedded in concrete. At the same time, the other end is also embedded in the concrete, and is fixed to the side of the other adjacent RC core wall 2b.
[0014]
The steel damper 5 is not limited to a steel beam such as an H-section steel, and any steel damper 5 may be used as long as it has a shape that can follow large horizontal deformation and accompanying vertical deformation. good.
[0015]
The viscous damper 6 is provided on the lower surface near the end of the bracket 3. The viscous damper 6 absorbs vibration energy by utilizing the viscous damping of the fluid. Since the viscous damper 6 does not have rigidity, the viscous damper 6 has a high seismic isolation effect in small and medium-sized earthquakes and has a damping force even for minute vibrations. In the present embodiment, the viscous damper 6 is an oil damper including a cylinder portion 6a and a piston portion 6b. The oil damper absorbs energy by viscous resistance when oil 6d inside the cylinder passes through the orifice 6c provided in the piston portion 6b.
[0016]
The viscous damper 6 is disposed coaxially with the vertical axis, and the end of the piston portion 6b is connected to the lower surface near the end of the bracket 3 and is provided below the bracket 3 so as to be adjacent to each other. An end portion of the cylinder portion 6a is connected to a bracket 3a of a boundary beam damper 1a which is a horizontal member arranged so as to bridge the RC core wall 2. Here, a rotatable pin support 7 is used for the joint portion between the cylinder portion 6a and the piston portion 6b and the brackets 3a and 3b, and when the RC core wall 2 is deformed by an earthquake or the like. In addition, a force acts on the piston portion 6b only in the axial direction.
[0017]
The viscous damper 6 is not limited to the oil damper, and any one may be used as long as it has a function as a viscous damper.
[0018]
As described above, a plurality of the boundary beam dampers 1 arranged so as to bridge between adjacent RC core walls 2 are arranged at predetermined intervals in the vertical direction in each layer of the super high-rise RC apartment house 8. It will be. At this time, as shown in FIG. 2, the brackets 3 constituting the boundary beam damper 1 are alternately provided on one RC core wall 2a and the other RC core wall 2b for each layer. Thereby, between the adjacent RC core walls 2, a plurality of the boundary beam dampers 1 in which the steel dampers 5 and the viscous dampers 6 are alternately arranged on the left and right in each layer are arranged.
[0019]
Therefore, the boundary beam damper 1 does not block the opening between the adjacent RC core walls 2, and both the steel damper 5 and the viscous damper 6 are always connected to the adjacent RC core walls 2. Will be arranged.
[0020]
According to the above-described configuration, since both the steel damper 5 and the viscous damper 6 are incorporated in the boundary beam damper 1, the viscous damper exhibiting damping performance even for micro vibrations when a small and medium earthquake occurs. 6 acts, and the greater the response displacement, the greater the steel damper 5 will act. The seismic effect can be effectively demonstrated for any magnitude of earthquake. It becomes possible.
[0021]
Further, since both the steel damper 5 and the viscous damper 6 incorporated in the boundary beam damper 1 are alternately arranged in a staggered manner for each boundary layer with respect to the adjacent RC core wall 2, the adjacent RC core walls are arranged. Both the steel damper 5 and the viscous damper 6 can be arranged efficiently without blocking the opening provided in 2, and the vibration in the RC structure can be suppressed reasonably without obstructing the space in the building. It becomes possible.
[0022]
【The invention's effect】
The boundary beam damper according to claim 1 is a short-span boundary beam damper in which a damping damper is incorporated in a boundary beam spanned between adjacent vertical members, from the side of one vertical member to the other A reinforced concrete bracket that is horizontally disposed so as to protrude toward the vertical member of the steel plate, a steel damper having one end fixed in the horizontal direction of the end of the bracket, and an end of the bracket One end portion is fixed to a lower portion in the vicinity, and the viscous damper is arranged coaxially with respect to the vertical axis. The other end portion of the steel damper is a side portion of the other vertical member. In addition, the other end of the viscous damper is fixed to a horizontal member spanned between adjacent vertical members below the bracket. The viscous damper, which shows damping performance, also acts on the motion, and the steel damper, which has a higher damping effect, acts on large earthquakes as the response displacement increases. The effect can be effectively exhibited.
[0023]
According to the boundary beam damper according to claim 2, the vertical members that are continuously provided in the vertical axis direction of the building having a plurality of levels are bridged between the adjacent vertical members at each level. In addition, a plurality of the short-span boundary beam dampers are horizontally arranged at predetermined intervals, and the arrangement positions of the steel dampers and the viscous dampers incorporated in the boundary beam dampers are alternately staggered on the left and right in each layer. In addition, the brackets constituting the boundary beam damper are alternately arranged for each layer on the side of one vertical member and the side of the other vertical member, and the other end of the viscous damper is connected to the bracket. Is fixed to the upper surface of the bracket of the boundary beam damper arranged below the steel plate, so that the steel material can be efficiently bonded without closing the opening provided in the adjacent RC core wall. Both par and viscous dampers can be arranged, without inhibiting the space within a building, it is possible to reasonably suppress vibration in RC structures structures.
[Brief description of the drawings]
FIG. 1 is a plan view of a high-rise building according to the present invention.
FIG. 2 is a view showing an arrangement state of boundary beam dampers with respect to an RC core wall according to the present invention.
FIG. 3 is a diagram showing details of a boundary beam damper according to the present invention.
FIG. 4 is a diagram showing an arrangement of boundary beam dampers with respect to a conventional RC core wall.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Boundary beam damper 2 RC core wall 3 Bracket 4 Damping damper 5 Steel damper 6 Viscous damper 7 Pin support 8 Super high-rise house 9 Outer pillar 10 Outer beam 11 Outer frame frame 12 Common zone

Claims (2)

A short-span boundary beam damper incorporating a damping damper in a boundary beam spanned between adjacent vertical members,
A bracket made of reinforced concrete that is horizontally arranged so as to protrude from the side of one vertical member toward the other vertical member;
In the horizontal direction of the end of the bracket, one end is fixed to the steel damper to which one end is fixed and the lower part in the vicinity of the end of the bracket, and is arranged coaxially with the vertical axis. The viscous damper
While the other end of the steel damper is fixed to the side of the other vertical member,
The boundary beam damper, wherein the other end of the viscous damper is fixed to a horizontal member spanned between adjacent vertical members below the bracket. A method for arranging a boundary beam damper using the boundary beam damper according to claim 1,
With respect to the vertical members continuously provided in the vertical axis direction of the building consisting of a plurality of levels, the short-span boundary beam damper is horizontally set so as to bridge between adjacent vertical members at each level. Several are arranged at intervals,
The brackets constituting the boundary beam damper are arranged on the side of one vertical member and on the other side so that the arrangement positions of the steel damper and the viscous damper incorporated in the boundary beam damper are staggered alternately left and right in each layer. And alternately arranged for each level on the side of the vertical member,
The boundary beam damper arrangement method, wherein the other end portion of the viscous damper is fixed to an upper surface of a bracket of the boundary beam damper arranged below the bracket.

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