KR102495504B1 - Vibration control device for outplane behavior twist anti buckling of cantilever type - Google Patents

Abstract

The present invention provides a cantilever-type out-of-plane torsional buckling prevention damping device, which can prevent the occurrence of out-of-plane torsional buckling in a damper behaving in the in-plane direction, thereby providing greater deformability and enhancing seismic performance. According to a suitable embodiment of the present invention, the cantilever-type out-of-plane torsional buckling prevention damping device comprises: a plate-shaped fixing plate; a pair of out-of-plane torsional buckling prevention plates, which are respectively arranged on both sides of a steel damper in a cantilever form that one end is fixed to the fixing plate and the other end forms a free end to face each other, thereby preventing out-of-plane deformation during plastic deformation of the steel damper; the steel damper which is inserted into a space in which the pair of out-of-plane torsional buckling prevention plates face each other, wherein one end is connected to the pair of out-of-plane torsional buckling prevention plates through a plurality of first fastening hinges, and the other end is installed to protrude beyond the free ends of the pair of out-of-plane torsional buckling prevention plates; a damper operation plate, which is spaced apart from the pair of out-of-plane torsional buckling prevention plates, and one end of which is connected through a plurality of second fastening hinges to the other end of the steel damper; and a fixing plate which is installed to face the fixing plate by connecting the other end of the damper operation plate. A damping gap which reduces a frictional contact area between the pair of out-of-plane torsional buckling prevention plates and the steel damper during damping, and provides a smooth plastic deformation of the steel damper is provided between the pair of out-of-plane torsional buckling prevention plates and the damper operation plate.

Description

{Vibration control device for outplane behavior twist anti buckling of cantilever type}

The present invention relates to a damping device used to dissipate seismic energy, and in particular, to prevent out-of-plane torsional buckling of a damper moving in the in-plane direction, thereby exhibiting a greater deformation capacity to improve seismic performance. Cantilever It relates to an out-of-plane torsional buckling damping device.

A number of cantilever-type steel dampers have been developed and used in earthquake-prone areas at home and abroad. In the case of overseas, the cantilever element is manufactured to move in the out-of-plane direction for stable behavior. Therefore, it has the advantage of stable behavior without torsional buckling. However, in Korea, a cantilever-type damper that moves in the in-plane direction of the plate is developed and used. In this case, the possibility of occurrence of out-of-plane torsional buckling is very high, and the damping ability is lowered. Therefore, there is a need for countermeasures that can prevent out-of-plane torsional buckling and exhibit greater deformation capacity.

As a background technology of the present invention, Korea Patent Registration No. 10-1882312 (Patent Document 1), 'anti-buckling shear type steel damper' has been proposed. This is to prevent buckling of the connection damper in the out-of-plane direction with horizontal braces that are butted on both sides of the center of the connection damper so that stable plastic deformation after yielding can be obtained. However, this background art has a structure in which the horizontal braces are fixed to both ends of the damping plate and move together when the damping plate is deformed, and the connecting bolts connecting the opposed horizontal braces are located in the slot holes. Therefore, during plastic deformation of the connecting damper, the connecting bolt blocks the movement of the slot hole, which can hinder the plastic deformation, and the horizontal brace also crosses the center of the connecting damper, which generates bending stress in the horizontal brace when torsional buckling occurs. There are downsides. In addition to this, there is a problem that the opposite function of suppressing the plastic deformation of the connecting damper during damping occurs as the opposing horizontal braces are matched and fastened with connecting bolts.

Korea Patent Registration No. 10-1882312

An object of the present invention is to provide a cantilever-type out-of-plane torsional buckling prevention and damping device capable of improving seismic performance by exhibiting a greater deformation capacity by preventing the occurrence of out-of-plane torsional buckling of a damper moving in the in-plane direction. .

According to a preferred embodiment of the present invention, a plate-shaped fixing plate; One end is fixed to the fixed plate and the other end is free and disposed on both sides of the steel damper in the form of a cantilever facing each other side by side to prevent out-of-plane deformation during plastic deformation of the steel damper A pair of out-of-plane torsional buckling prevention plates and ; It is inserted into the spaced space facing the pair of out-of-plane torsion anti-buckling plates, one end is connected to the pair of out-of-plane torsional buckling anti-buckling plates through the coupling of a plurality of first fastening hinges, and the other end is connected to the pair of out-of-plane torsional buckling anti-buckling plates. A steel damper installed so as to protrude beyond the free end of the; a damper operating plate having one end connected to the other end of the steel damper through a plurality of second fastening hinges, spaced apart from the pair of out-of-plane torsion anti-buckling plates; And a fixing plate connected to the other end of the damper operating plate and installed to face the fixed plate, wherein the steel damper has a fixed end and one end having a maximum width at the fixed end and gradually reduced to protrude by a certain length to be fired in the in-plane direction It has a deformable pillar part and a prismatic rotating end extending to the minimum width of the pillar part, and the pair of out-of-plane torsional buckling prevention plates reduce friction with the steel damper during damping, and at the same time observe the degree of plastic deformation of the steel damper An expansion slot hole for observation is formed, and the frictional area between the pair of out-of-plane torsional buckling prevention plates and the steel damper is reduced between the pair of out-of-plane torsional buckling prevention plates and the damper operating plate. At the same time, It is characterized by having a constant damping gap for smooth plastic deformation of the steel damper.

According to another preferred embodiment of the present invention, a plate-shaped fixing plate; a damper connecting plate having one end fixed to the fixing plate and disposed in a vertical direction; A pair of steel dampers having one end connected to the damper connection plate via a plurality of first fastening hinges, disposed to face each other, and the other end protruding from the free end of the pair of out-of-plane torsion anti-buckling plates; The pair of steel dampers are located on the outer side of each other and are spaced side by side to face each other. One end is connected and fixed to the damper connecting plate via the first fastening hinge, and the other end is spaced apart from the damper operating plate, resulting in out-of-plane deformation of the steel damper A pair of out-of-plane torsion anti-buckling plates to prevent; A damper operating plate, one end of which is connected to the other end of the steel damper through a plurality of second fastening hinges and installed to face the fixed plate, wherein the steel damper has a fixed end and one end has a maximum width at the fixed end and gradually shrinks It has a pillar part that protrudes by a certain length and plastically deforms in the in-plane direction, and a angular rotating end that extends to the minimum width of the pillar part. At the same time, an expansion slot hole for observation is formed to observe the degree of plastic deformation of the steel damper, and a pair of out-of-plane torsion anti-buckling plates and It is characterized in that it has a constant damping gap for smooth plastic deformation of the steel damper while reducing the friction area between the steel dampers.

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In addition, the pair of out-of-plane torsion anti-buckling plates are characterized in that vertical stiffeners for reinforcing anti-buckling plates are installed at two or more locations on the outer surface of each.

In addition, it is characterized in that friction pads for generating frictional resistance during damping are further installed between the damper operating plate and the damper operating plate on both sides of the angular rotary end side of the steel damper.

In addition, an additional intermediate plate for preventing out-of-plane buckling is further disposed between the pair of steel dampers, and is supported by a pair of out-of-plane torsion anti-buckling plates through bolt coupling.

On the other hand, the damping system using the cantilever-type out-of-plane torsion anti-buckling damping device of the present invention includes the cantilever-type out-of-plane torsion anti-buckling damping device, is disposed in the opening of the structure, and then fixes the fixing plate to be supported at one place in the opening of the structure. It is characterized in that it is installed, and the fixing plate is fixedly installed so as to be supported at another place in the opening of the structure.

According to the cantilever-type out-of-plane torsion anti-buckling damping device of the present invention, the pair of out-of-plane torsional buckling anti-buckling plates have a certain gap with the damper operating plate during damping and are not affected by any external force even when the steel damper is plastically deformed. Out-of-plane torsional buckling can be effectively prevented.

In addition, the degree of plastic deformation of the steel damper can be easily observed through an expansion slot hole for observation formed in the out-of-plane torsional buckling prevention plate.

In addition, the deformability is greatly increased by the geometrical structure of the column part and the angular rotating end of the steel damper, so that the seismic energy dissipation ability can be improved.

In addition, even when friction pads are installed between the damper actuating plate on both sides of the prismatic rotating end side of the steel damper, frictional resistance is generated during vibration damping to further increase the ability to dissipate seismic energy.

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the invention serve to further understand the technical idea of the present invention, the present invention is limited to those described in the accompanying drawings. It should not be construed as limiting.
1 is a perspective view of a cantilever-type out-of-plane torsion anti-buckling damping device according to a first embodiment of the present invention.
2a and 2b are a front view of FIG. 1 and a cross-sectional view along line AA of FIG. 2a.
3a and 3b are a front view of the steel damper applied in FIG. 1 and a stress distribution diagram of a shear surface according to its shape.
Figures 4a and 4b is a stress distribution diagram of the shear surface according to the shape and aspect ratio of the existing steel damper.
5A and 5B are a front view and a cross-sectional view taken along line CC in a state in which a friction pad is additionally installed in the cantilever-type out-of-plane torsion anti-buckling damping device according to the first embodiment of the present invention.
6A and 6B are perspective views of a cantilever-type out-of-plane torsion anti-buckling damping device according to a second embodiment of the present invention.
7A and 7B are front views and DD line cross-sectional views in a state in which an intermediate plate for preventing out-of-plane buckling is additionally installed in a cantilever-type out-of-plane torsion anti-buckling damping device according to a second embodiment of the present invention.
8A and 8B are configuration diagrams of various damping systems using a cantilever-type out-of-plane torsion anti-buckling damping device according to an embodiment of the present invention.

Below, the present invention will be described in detail with reference to the embodiments presented in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

<First Embodiment>

The cantilever-type out-of-plane torsion anti-buckling damping device 10 according to the first embodiment of the present invention includes a fixing plate 12, a pair of out-of-plane torsional buckling prevention plates 14 and 14, and a steel damper as shown in FIGS. 1 to 3 20), a damper operation plate 24 and a fixing plate 26, but the steel damper 20 is installed in a single type and at the same time a pair of out-of-plane torsion anti-buckling plates 14 and 14 are installed through the fixing plate 12 characteristics that are associated with it.

The fixing plate 12 is made of plate-shaped steel that is fixedly installed at one location in the opening 102 of the structure 100. The fixing plate 12 may be fixed to the side of the opening 102 of the structure 100 through bolts.

A pair of out-of-plane torsional buckling prevention plates 14 and 14 are installed to prevent out-of-plane deformation of the steel damper 20. The pair of out-of-plane torsional buckling prevention plates 14 and 14 may be made of steel. A pair of out-of-plane torsional buckling prevention plates 14 and 14 are spaced side by side with one end bonded to the fixing plate 12 so as to face each other.

Here, the pair of out-of-plane torsion anti-buckling plates 14 and 14 have vertical stiffeners 15 for reinforcing anti-buckling plates so that reinforcement through anti-buckling of the out-of-plane torsion anti-buckling plates 14 and 14 is performed on the outer surfaces, respectively. Can be installed in 2 or more locations. The vertical stiffener 15 for reinforcing the anti-buckling plate is manufactured in the form of a bar having a rectangular cross section in this embodiment, but is not limited to this cross section and shape.

A pair of out-of-plane torsion anti-buckling plates 14 and 14 reduce friction with the steel damper 20 during damping (when plastic deformation of the steel damper 20) and at the same time observe the degree of plastic deformation of the steel damper It is preferable that an expansion slot hole 142 for observation is formed. The expansion slot hole 142 for observation is preferably located so that the central portion of the pillar portion 202 plastically deformed in the steel damper 20 can be observed. Therefore, during damping, the pair of out-of-plane torsional buckling prevention plates 14 and 14 suppress out-of-plane deformation (torsional buckling) on the side of the steel damper 20, and at the same time, surface friction of the size of the expansion slot hole 142 for observation This is removed so that the plastic deformation of the steel damper 20 is smoothly performed.

The steel damper 20 is inserted between the pair of out-of-plane torsion anti-buckling plates 14 and 14, and one end is coupled with a plurality of first fastening hinges 16 to form a pair of out-of-plane torsion anti-buckling plates 14, 14) are connected. The first fastening hinge 16 is configured by fastening with bolts and nuts, but may also be configured in the form of pins.

As shown in FIG. 3A, the steel damper 20 has a fixed end 201, one end of which has a maximum width at the fixed end 201 and is gradually reduced and protrudes by a certain length to plastically deform in the in-plane direction 202, the pillar portion It has a prismatic rotating end 203 extending at the minimum width of 202. In this way, the steel damper 20 has the deformation capacity of the conventionally known FIG. It can be seen that it is greatly increased as shown in FIG. 4b compared to the steel damper. Here, Figure 4b shows the stress distribution of the shear surface according to the shape and aspect ratio of the existing steel damper shown in Figure 4a.

One end of the damper operating plate 24 is connected to the other end of the steel damper 20 through a plurality of second fastening hinges 22. The damper operating plates 24 are configured as a pair, but may be installed as a single type.

The fixing plate 26 connects the other end of the damper operating plate 24 and is installed to be supported at another place in the opening 102 of the structure 100.

On the other hand, between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the damper operation plate 24, a pair of out-of-plane torsional buckling prevention plates 14 and 14 and a steel damper 20 At the same time as reducing the friction area between the ), it has a constant damping gap G for smooth plastic deformation of the steel damper 20. Therefore, the damper operation plate 24 does not interfere with the plastic deformation of the steel damper 20.

Here, as shown in FIGS. 5A and 5B, friction pads 40 that generate frictional resistance during damping between the damper operating plate 24 are further installed on both sides of the angular rotary end 203 side of the steel damper 20 can Therefore, when the pillar portion 202 of the steel damper 20 is forcibly plastically deformed, rotational frictional resistance is also generated in the friction pad 40, so that seismic energy dissipation capability can be further increased.

<Second Embodiment>

In the second embodiment, the same or equivalent parts as those in the first embodiment use the same reference numerals. In addition, components not mentioned in the second embodiment are the same as those in the first embodiment, so detailed descriptions thereof are omitted.

The cantilever-type out-of-plane torsion anti-buckling damping device 10 according to the second embodiment of the present invention includes a fixing plate 12, a pair of out-of-plane torsional buckling prevention plates 14 and 14, and a steel damper as shown in FIGS. 6A and 6B. 20), including a damper operation plate 24 and a fixing plate 26, but one end fixed to the fixing plate 12 and the additional installation of the damper connection plate 13 disposed vertically, and the damper connection plate 13 ) has a feature of connecting and installing a pair of out-of-plane torsion anti-buckling plates 14 and 14 and a plurality of steel dampers 20. Additionally, a pair of out-of-plane torsion anti-buckling plates 14 and 14 are installed.

Therefore, in the cantilever-type out-of-plane torsion anti-buckling damping device 10 according to the second embodiment, a pair of steel dampers 20 and 20 are fixed to a fixed plate ( 12) is connected to The damper connection plate 13 has one end bonded to the fixing plate 12 in the vertical direction and the other end disposed between the pair of steel dampers 20 and 20.

Of course, between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the damper operation plate 24, a pair of out-of-plane torsional buckling prevention plates 14 and 14 and a steel damper 20 At the same time as reducing the friction area between the ), it has a constant damping gap G for smooth plastic deformation of the steel damper 20.

Meanwhile, as shown in FIGS. 7A and 7B , an additional intermediate plate 30 for preventing out-of-plane buckling may be further disposed and installed between the pair of steel dampers 20 and 20 . The middle plate 30 for preventing out-of-plane buckling is fixedly installed to be supported by a pair of out-of-plane torsion anti-buckling plates 14 and 14 through a bolt having a smaller diameter than the first fastening hinge 16 or the second fastening hinge 22 .

As described above, in the cantilever-type out-of-plane torsion anti-buckling damping device 10 according to the second embodiment, a plurality of steel dampers 20 are installed to increase energy dissipation capacity. In addition, in addition to the pair of out-of-plane torsional buckling prevention plates 14 and 14, an additional out-of-plane buckling prevention middle plate 30 is installed to effectively suppress torsional buckling of all steel dampers 20, which are expanded in plurality.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and variations without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by these variations and modifications, but is limited only by the claims appended below.

12: fixed plate
14: out-of-plane torsion anti-buckling plate
142: expansion slot hole for observation
15: vertical stiffener
16: first fastening hinge
20: steel damper
201: fixed end
202: column part
203: angular rotating end
22: second fastening hinge
24: damper operating plate
26: fixing plate

Claims (8)

A plate-shaped fixing plate 12;
One end is fixed to the fixed plate 12 and the other end forms a free end and is disposed on both sides of the steel damper 20 in the form of a cantilever facing each other side by side to prevent out-of-plane deformation during plastic deformation of the steel damper 20 a pair of out-of-plane torsional buckling prevention plates 14 and 14;
The pair of out-of-plane torsion anti-buckling plates 14 and 14 are inserted into the opposing spaced spaces, and one end of the pair of out-of-plane torsion anti-buckling plates 14 and 14 is coupled with a plurality of first fastening hinges 16 A steel damper 20 connected to and installed so that the other end protrudes from the free end of the pair of out-of-plane torsion anti-buckling plates 14 and 14;
A damper operating plate 24 having one end connected to the other end of the steel damper 20 through a plurality of second fastening hinges 22 and spaced apart from the pair of out-of-plane torsional buckling prevention plates 14 and 14; and
Including a fixing plate 26 installed to face the fixing plate 12 by connecting the other end of the damper operating plate 24,
The steel damper 20 has a fixed end 201, one end of which has a maximum width at the fixed end 201 and is gradually reduced to protrude by a certain length to plastically deform in the in-plane direction 202, the pillar 202 ) has a rectangular rotating end 203 extending to the minimum width of
The pair of out-of-plane torsional buckling prevention plates 14 and 14 each reduce friction with the steel damper 20 during damping and at the same time observe the degree of plastic deformation of the steel damper. An expansion slot hole 142 for observation is provided. is formed,
Between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the damper operation plate 24, the friction area between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the steel damper 20 is reduced during damping At the same time, the cantilever-type out-of-plane torsion anti-buckling damping device, characterized in that it has a constant damping gap (G) for smooth plastic deformation of the steel damper (20). A plate-shaped fixing plate 12;
a damper connecting plate 13 having one end fixed to the fixing plate 12 and disposed in a vertical direction;
One end is connected to the damper connecting plate 13 via a plurality of first fastening hinges 16 and arranged to face each other, and the other end protrudes beyond the free end of the pair of out-of-plane torsion anti-buckling plates 14 and 14 A pair of steel dampers 20 and 20 are installed;
The pair of steel dampers 20 and 20 are located on the outer surfaces of each other and are spaced side by side to face each other, one end connected to and fixed to the damper connecting plate 13 via the first fastening hinge 16, and the other end A pair of out-of-plane torsional buckling prevention plates 14 and 14 that are spaced apart from the damper operating plate 24 to prevent out-of-plane deformation of the steel dampers 20 and 20;
A damper operating plate 24 having one end connected to the other end of the steel damper 20 through a plurality of second fastening hinges 22 and installed to face the fixed plate 12; including,
The steel damper 20 has a fixed end 201, one end of which has a maximum width at the fixed end 201 and is gradually reduced to protrude by a certain length to plastically deform in the in-plane direction 202, the pillar 202 ) has a rectangular rotating end 203 extending to the minimum width of
The pair of out-of-plane torsional buckling prevention plates 14 and 14 each reduce friction with the steel damper 20 during damping and at the same time observe the degree of plastic deformation of the steel damper. An expansion slot hole 142 for observation is provided. is formed,
Between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the damper operation plate 24, the friction area between the pair of out-of-plane torsional buckling prevention plates 14 and 14 and the steel damper 20 is reduced during damping At the same time, the cantilever-type out-of-plane torsion anti-buckling damping device, characterized in that it has a constant damping gap (G) for smooth plastic deformation of the steel damper (20). delete delete According to claim 1 or 2,
A pair of out-of-plane torsion anti-buckling anti-buckling devices (14, 14), characterized in that the vertical stiffeners (15) for anti-buckling anti-buckling plate reinforcement are installed at two or more places on the outer surface, respectively. According to claim 1 or 2,
Cantilever-type out-of-plane twist, characterized in that friction pads 40 that generate frictional resistance during vibration damping are further installed between the damper operating plate 24 on both sides of the angular rotation end 203 of the steel damper 20 Anti-buckling damping device. According to claim 2,
Between the pair of steel dampers 20 and 20, an additional middle plate 30 for preventing out-of-plane buckling is further disposed and supported by a pair of out-of-plane torsion anti-buckling plates 14 and 14 through bolt coupling. A cantilever-type out-of-plane torsion anti-buckling damping device. After the cantilever-type out-of-plane torsion anti-buckling damping device 10 of claim 1 or 2 is provided and placed in the opening 102 of the structure 100, the fixing plate 12 is placed in the opening 102 of the structure 100. A damping system using a cantilever-type out-of-plane torsion anti-buckling damping device, characterized in that it is fixedly installed to be supported in one place, and the anchoring plate 26 is fixedly installed to be supported in another place in the opening 102 of the structure 100. .

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