JPH08312192A - Vibration damping structure of structure - Google Patents

Abstract

PURPOSE: To improve damping performance against horizontal vibration of a framework, to be effective to a long distance, and to improve durability by incorporating a damping device in the framework of a structure. CONSTITUTION: An oil damper 10 and a single wire rope 20 serving as a tension member are incorporated in a framework 1 wherein a beam 1" is arranged between columns 1'. The two end parts of the wire rope 20 are fixed to the lower end part of each column 1' and extended through an annular fastening metal fitting connected to the tip of a resistance part, and further, span in the shape of a dog-leg, where a lower part is released, without a slackness. This constitution displaces a framework to one in a horizontal direction when a horizontal force is exerted on the framework 1 to stretch the wire rope 20. A first section I is lengthened and a second section II is shortened. When displacement occurs in a reverse direction, reverse operation is carried out. Through repetition of the above, horizontal vibration of the framework 1 is damped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping structure for a structure, and more particularly, a damping device such as an oil damper or an elasto-plastic damper is incorporated in a frame of a structure to improve the damping performance against horizontal vibration of the frame. Regarding the structure.

[0002]

2. Description of the Related Art As a structure for incorporating a damping device into a frame,
Conventionally, a damping device 90 is provided on the top of a K-shaped brace 91 as shown in FIGS.
A mode in which a damping device 90 'is provided at each end of an X-shaped brace 91' as shown in (a) and (b) is adopted.

[0003]

However, in the case of the K-shaped brace, in order to bear the compressive force on the brace, it has to be increased in accordance with the length of the distance where the cross section of the brace is arranged. Was not practical, such as being unsuitable.

Further, in the case of the X-type brace, there is a problem in durability such that the brace on the compression side buckles or the damping device does not function due to repeated loading of compression and tension.

The present invention has been made in view of the above problems, and an object thereof is a vibration damping structure in a structure which can be effectively applied even over a long distance and whose durability is not impaired. To provide.

[0006]

A vibration damping structure in a structure according to the present invention has a structure in which a damping device is incorporated, and horizontal vibration due to an earthquake / wind response of the frame is generated on the follower side of the damping device. It is designed to be attenuated by following and resistance on the resistance side.

As the damping device, a known one such as an oil damper, an elasto-plastic damper, a friction damper, etc. can be used, and since the follower side and the resistance side of the damping device have a relative function, they are strictly distinguished in the present invention. Does not need

The frame is a main structure composed of structural members such as beams and columns in a building and a frame structure in a megastructure.

The present invention provides means for achieving the above object,
When the skeleton is displaced to one side in the horizontal direction, a first section that extends between the skeletons and a second section that shortens the skeleton intersects a part of the skeleton at an intersecting portion (a top portion with respect to a flared end in a doglegged shape) ) Is selected to have a dogleg shape, the follower side is fixed to the intersection, and the resistance side and the skeleton are bridged without slack in the first section and the second section, respectively. It is configured by connecting with a tension material that does not bear the load.

That is, according to the present invention, the damping side having the follower side fixed to one portion of the skeleton is connected to two portions of the other portion of the skeleton through the tension member arranged in the dogleg shape on the resistance side. It is a thing.

The tension material is a wire rope that does not bear a compressive force but a tensile force or a similar material.
The V-shape is formed in series or in pairs.

The first section and the second section, which connect the resistance side of the damping device and the frame with a tension member, are normally arranged between the constituent members of the frame when the frame receives a horizontal force and is displaced in one of the horizontal directions. Compared with time, they are a stretched section and a shortened section, respectively. When the frame is displaced in the opposite horizontal direction, the first section is shortened and the second section is stretched.

Further, it is possible to select a plurality of combinations of the first and second sections and install a plurality of tension members bridging in a dogleg shape in the same frame.

Further, whether or not the tension member is fixed to the resistance side of the damping device is determined by the type of the damping device.

[0015]

In the present invention, the tension member spanning the first section when the frame of the structure is displaced in one of the horizontal directions in response to an earthquake and wind, and the second section when the structure is displaced in the opposite direction. Each of the tension members pulls the resistance side of the damping device.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 (a) is a front view schematically showing an example in which a frame 1 formed by arranging beams 1 "between columns-columns 1'is used as a vibration damping structure in a structure according to the present invention. , Figure 1
(B) shows a state in which the frame 1 is displaced to the right in the horizontal direction due to an earthquake / wind response. This structure is configured by assembling two oil dampers 10 (see FIG. 2) as a damping device together with one (series) wire rope 20 as a tension member in the frame 1.

2 (a), 4 and 3 (a) are enlarged views of the vicinity of the oil damper 10 as seen from the directions A and C of FIG. 1 and the direction B of FIG. 2 (a), respectively. The oil damper 10 is a known one integrally provided with a cylinder-shaped follow-up portion 11 filled and sealed with oil, and a resistance portion 12 that resists displacement of the follow-up portion 11 through adjustment of hydraulic pressure. It is fixed to the central portion of the beam 1 ″ as an intersecting portion. The resistance portion 12 is exposed in a rod shape from both end portions of the follower portion 10 and is bent in the vicinity of each tip for convenience to have a U-shape.

Further, both ends of the wire rope 20 are fixed to the lower ends of the respective pillars 1 ', and the central portion thereof is bulged so as to be connected to the respective end portions of the resistance portion 12, and the ring-shaped fastener 13 is provided.
It is restrained by and is laid loosely in a dogleg shape that opens downward. In addition, each oil damper 10 is a fastener 13
To share.

Reference numeral 14 is a sliding metal article for smoothly changing the direction of the wire rope 20, and a pulley or the like may be used.

Next, the operation of the above structure will be described. When a structure (not shown) is subjected to an earthquake or a strong wind and a horizontal force is applied to the frame 1, the frame 1 is displaced in one of the horizontal directions as shown in FIG. At this time, one first section I in which the wire rope 20 is substantially linear extends and the other second section II shortens. Therefore, the wire rope 20 ′ in the first section I is tensioned and pulls the resistance portion 12 of the oil damper 10 (see FIGS. 2B and 3B) to operate the oil damper 10 on the skeleton 1. . Meanwhile, the second
The wire rope 20 ″ in the section II of the section slightly loosens. When the frame 1 is subsequently displaced in the opposite horizontal direction (not shown), the first section I is shortened and the second section II is extended, so that The wire rope 20 ″ in the second section II activates the oil damper 10 in the reverse stroke. By repeating such an operation, the horizontal vibration of the frame 1 is damped.

The wire ropes 20 may be used in pairs instead of a series, and the oil damper 10 can be used in a desired number by devising a connection with the wire ropes 20.

The oil damper 1 is used as a damping device.
In addition to 0, the plastic-plastic damper 50 can be used, and as shown in FIG. 5 which is the same viewpoint as FIG. 4, one part of the laminated plastic-plastic hardware 50 ′ serves as the follow-up part 51 and the other part relatively has resistance. It becomes the portion 52 and is connected to the frame 1 side and the wire rope 20 side via the connecting members that are respectively bolted.

Further, FIGS. 6A and 6B show the case where a friction damper 60 is used as another example of the damping device. In this case, the dogleg-shaped tops of the series of wire ropes 20 are tightened by a substantially arc-shaped (semicircular in cross section) tightening portion 63 ′ set between the pair of tightening hardware 63.
The tightening degree is set to a predetermined value by adjusting the tightening condition of the bolt 64. Further, each tightening piece 63 is connected to the beam 1 ″ of the frame through an attachment piece 65 that is bolted and connected.
Fixed to. Therefore, the fastener 63 becomes the follow-up portion 61 that follows the horizontal vibration of the skeleton, and the part of the wire rope 20 that contacts the inner peripheral surface of the tightening portion 63 ′ is rubbed by the follow-up portion 61 due to friction during horizontal displacement of the skeleton. Becomes a resistance portion 62 that resists.

FIG. 7A shows a damping device 10b and a wire rope 20 for the frame 1a in which the frames shown in FIG. 1 are arranged side by side.
This is an example in which two sets of and are incorporated, and one set is arranged in a dogleg shape that opens upward and the other set opens downward. Note that the connection between the damping device 10a and the wire rope 20 and the like are substantially the same as those already described, and therefore description thereof will be omitted. In this structure, one of the diagonal lines of the left and right frame units is selected as the first section and the other is selected as the second section,
The damping device 1 is provided on the upper and lower sides of the central pillar 1a 'which is each intersection.
0a is installed. Figure 7 shows the horizontal displacement of this structure.
It shows in (b).

FIG. 8A shows a damping device 10b and a wire rope 20 for the frame 1b in which the frames shown in FIG.
Is an example in which two sets are combined so that one is opened to the left and the other is opened to the right, and the damping devices 10b are provided on the left and right sides of the central beam 1b ″ which is the intersection. The horizontal displacement state of this structure is shown in FIG.

9 (a) and 9 (b) show a frame (mega pillar 91, cane pillar 1c, supporting the arena frame (not shown)).
FIG. 10 is a schematic view showing an example in which the present invention is applied to a horizontal ring 93), and a black-painted portion 91 ′ in FIG. 9A is a cross section of a portion corresponding to a mega pillar 91 (see FIG. 9B) of the megastructure. The black-painted portion 92 represents a cross section of a portion corresponding to a megastructure beam (not shown).

The wire rope 20 is placed in a truncated cone-shaped surface (see FIG. 9 (b)) formed by each cane column 1c constituting the frame.
The damping device 10c is incorporated while being bridged in a zigzag shape by using two sets each.

The present invention is not limited to the above embodiment, but the lengths of the first section and the second section are different, or one long wire rope fixes a plurality of doglegged shapes at predetermined positions. However, it should be understood that there may be cases where they are formed.

[0030]

As described above, according to the present invention, since the damping device is incorporated into the frame through the tension member that does not bear the compressive force, the tension member is not restricted by the slenderness ratio, and the long distance and the large frame ( It is possible to effectively incorporate a damping device into the framework of the megastructure.

Further, there is no fear that the tensile member will buckle and the function of the damping device will be impaired.

Further, the tension member which does not bear the compressive force is easier to handle than the brace, and the labor and cost for incorporating the damping device can be saved.

[Brief description of drawings]

FIG. 1 is a front view (a) schematically showing a vibration damping structure according to the present invention and a front view (b) showing a state where a frame is displaced.

FIG. 2 is a plan view (a) near the oil damper viewed from the direction A in FIG. 1 and a plan view (b) showing a displaced state.

3 is a front view (a) of the vicinity of the oil damper as viewed from the direction B in FIG. 2 and a plan view (b) showing a displacement state.

FIG. 4 is a side view of the vicinity of the oil damper as viewed from the direction C of FIG.

FIG. 5 is a side view of the same viewpoint as FIG. 4 showing an example using an elastoplastic damper.

FIG. 6 is a front view showing an example using a friction damper (a).
And FIG.

FIG. 7 is a front view (a) showing an example in which the present invention is applied to left and right side-by-side frames and a front view (b) showing a displaced state.

FIG. 8 is a front view (a) showing an example in which the present invention is applied to a vertically stacked frame and a front view (b) showing a displaced state.

FIG. 9 is a front view (a) schematically showing an example in which the present invention is applied between column bases of an arena frame, and a schematic perspective view (b) thereof.

FIG. 10 is a front view (a) showing a conventional K-shaped brace,
It is a front view (b) which shows a displacement state.

FIG. 11 is a front view (a) showing a conventional X-shaped brace and a front view (b) showing a displacement state.

[Explanation of symbols]

 1, 1a, 1b Frame 1c Ball rod 10 Oil damper 10a, 10b, 10c Damping device 11, 51, 61 Follower part 12, 52, 62 Resistance part 20 Wire rope 50 Elasto-plastic damper 60 Friction damper

Claims (1)

[Claims] 1. Incorporating a damping device into the frame of a structure,
In a vibration damping structure in which horizontal vibration due to earthquake / wind response of the frame is damped by the follow-up side and the resistance-side resistance in the damping device, when the frame is displaced in one of the horizontal directions, First growing between
Section and a second section to be shortened are selected so as to form a dogleg shape with a part of the frame as an intersection, the follower side is fixed to the intersection, and the resistance side and the frame are described above. First
A vibration damping structure in a structure, characterized in that the section and the second section are connected to each other by a tension material that does not bear the compressive force laid loosely.