KR20160122956A

KR20160122956A - Multiaction-type Plate Steel Damper

Info

Publication number: KR20160122956A
Application number: KR1020150052844A
Authority: KR
Inventors: 전금석; 황정현
Original assignee: 전금석; 황정현
Priority date: 2015-04-15
Filing date: 2015-04-15
Publication date: 2016-10-25

Abstract

The present invention relates to a damper for damping installed on a building so as to reduce the damage of a building by absorbing and dissipating the energy flowing into the building due to an earthquake. The damping unit 110 and the fixing unit 120 ; The damping unit 110 includes a pair of support plates 111 which are spaced apart from each other and which are made of a steel plate and at least one damper element 111 having both end portions integrally fixed to each other between the pair of support plates 111 112); The damper element 112 is characterized by being a plate-like steel plate having a curved section.

Description

[0001] Description [0002] Multiaction-type plate steel damper [

The present invention relates to a damper for damping installed on a building so as to absorb damage of a building by absorbing and effectively dissipating energy flowing into a building due to an earthquake. More specifically, the present invention relates to a damper for damping energy To a damper.

Recent earthquakes, including the 1995 Kobe Earthquake, 1999 Kocaeli in Turkey, Taiwan Support, Gujarat in 2001, Pakistan in 2005, Sichuan in 2008, Haiti in 2010, Chile in 2011, Christchurch in New Zealand in 2011, , Causing enormous damage to the extent that was unimaginable in the past.

The massive damage of these earthquakes is caused by the densification of buildings due to the rapid industrialization urbanization rather than the increase in the magnitude of earthquakes. Moreover, recently, the construction of skyscraper buildings with large slenderness has been greatly increased. Is strongly influenced by vibration. Therefore, a vibration damping device for wind or earthquake is indispensably required.

These vibration suppression devices are being developed in various kinds, and it is largely designed to detect the vibrations from the outside and the vibrations of the building according to the building itself, and the control force corresponding to the vibration of the building is applied inside and outside the building, And a passive type in which a building controls dynamic response by improving the attenuation performance of a building by installing an energy dissipating device in the building.

However, the above-mentioned active type vibration suppression apparatus requires precise mechanical and external power, requires facilities and costs for maintenance, and may cause a serious error risk. It is limited.

On the other hand, the passive type vibration suppression system using the passive energy dissipation device does not require the external power and the maintenance cost is not accompanied separately, and its application range is spread rapidly in the USA and Japan, .

The passive vibration damper is classified into a steel damper, a friction damper, a viscous damper, and the like, among which the present invention corresponds to a steel damper.

The degree of energy dissipation capacity of the steel damper plays an important role in the initial stiffness and ductility of the damper element. Figure 1 compares the damping effects with initial stiffness and ductility capabilities.

As shown in Fig. 1 (a), when the initial rigidity is large but the ductility is poor, the energy dissipation capacity (internal area) is small compared with the case where the ductility is large . On the contrary, as shown in (b), since the energy dissipation capacity (internal area) is smaller than the case where the initial stiffness is large (the portion indicated by the dotted line) even when the initial stiffness is small, .

However, when the same initial stiffness and ductility capacity are maintained, the energy dissipation capacity changes depending on the magnitude of the yield strength of the material. Therefore, in order for a steel damper to function as a high-performance damper, initial stiffness, ductility and yield strength of the material should be considered as important factors.

On the other hand, a steel damper generally uses a plate member made of a thin steel plate as a damper element so as to have ductility in the in-plane direction, and a plurality of such plates are stacked to improve the initial strength.

As a representative example thereof, there is a steel damper having a name of 'Hexagon type hysteresis damper using interlayer deformation' of Registration No. 10-1186448.

2, the vibration damping body 10 comprises a plurality of damping plates 11 and a simple plate 12 disposed between the damping plates 11, The first and second bodies 10 and 20b are coupled to the first and second bodies 20a and 20b by the fixing bolts 14, respectively.

The damping plate 11 is made of a thin steel plate. The flat surface of the damping plate 11 has a middle short width portion and a long width portion at both ends. The connection portion between the short width portion and the long width portion has a shape Lt; / RTI >

The first and second bodies 20a and 20b are respectively fixed to the damping plate 11 by fastening bolts 21a and 21b connected to the front shear reinforcement 30, 22a, 22b and H-shaped cross sections, and the baffle plates 22a, 22b are formed with holes 23 for improving the compounding force with concrete.

When a horizontal load such as an earthquake occurs, the steel damper of the above-mentioned registration number 10-1186448 absorbs the horizontal load by plastic deformation of the end of the damping plate.

That is, the steel damper of Registration No. 10-1186448 utilizes the high ductility of the thin steel sheet in the in-plane direction, while securing the initial strength by stacking a plurality of these.

However, the steel damper of Registration No. 10-1186448 has the following problems.

First, since the energy absorbing damping plate is made of a thin steel plate, it is only effective against the in-plane behavior, and thus has a problem in that it is weak against lateral forces in the out-of-plane direction.

Secondly, the damping plate is configured as a flat plate type, but the allowable interlayer changing angle is limited. As a result, the width and length of the flat damping plate are limited, so that the deformation value is limited. If a large deformation occurs in the plate, a tensile force acts to reduce the cross-sectional area.

Thirdly, the respective components including the damping plate are coupled by bolts, thereby causing a slip phenomenon between the components. Such a slipping phenomenon is caused by the fact that the steel damper does not bear the horizontal load and is transferred to the structure of the building, There is a problem of avoiding its role as a damper.

Fourth, the first and second bodies connecting the vibration absorber and the shear reinforcement are complicated in construction, have a shape of H-shaped steel, and excessively reinforce the structure in which they are synthesized, thereby causing unnecessary cost.

FIG. 3 shows another prior art vibration damping device proposed by the inventor of the present invention, entitled 'Bi-directional steel damper and anti-breaking steel structure of a structure using the same' of Registration No. 10-1400423.

The steel damper of the above registration No. 10-1400423 includes a first vertical damping plate 3 and a second vertical damping plate 3 perpendicular to each other between a first horizontal support plate 1 and a second horizontal support plate 2 which are vertically spaced apart, The plate 4 is provided so as to be movable in both directions.

However, since the first and second vertical damping plates 3 and 4 are made of a flat plate-shaped steel sheet, the steel damper has a limitation in stretching capability and is vulnerable to large deformation. In the steel material damper of the above-mentioned registration number 10-1186448, It is not easy to secure the initial strength because it is impossible to install a plurality of the vertical damping plates 3 and 4 in addition to the damper and it is not only easy to merely act in both directions perpendicular to each other, There is still a problem in that it is still weak.

KR 10-1186448 B1 KR 10-1400423 B1 KR 10-1145881 B1

It is an object of the present invention to solve the problems of the prior art described above, and it is an object of the present invention to provide a damper element which can efficiently move in an in- And to provide a multi-acting plate steel damper which can maximize the elongation performance.

Also, the present invention provides a multi-acting plate steel damper which can prevent the slip phenomenon from occurring at the coupling portion of the damper element, ensure the function of the steel damper, and can easily manufacture and reduce the amount of steel material There is another purpose.

According to a most preferred embodiment of the present invention for solving the above problems, there is provided an image forming apparatus comprising: a damping portion and a fusing portion; Wherein the damping portion comprises a pair of support plates spaced apart from each other and facing each other and made of a steel plate and at least one damper element having both end portions integrally fixed to each other between the pair of support plates; Wherein the damper element is formed of a plate-like steel plate having a curved cross section.

At this time, the damper element may have a S-shaped cross section or may have a convex cross section at the center.

According to another embodiment of the present invention, the fusing unit includes a fixing steel bar symmetrically disposed on the upper and lower sides, a band steel bar surrounding the fixing steel bar, and a fixing bracket attached to one end of the fixing steel bar A multi-acting plate steel damper is provided.

In the present invention, the plate-shaped damper element absorbs seismic forces in all directions by in-plane behavior as well as in-plane behavior, thereby making it universal to the application range.

Further, the present invention can increase the initial strength per unit element of the damper element by increasing the cross-sectional area of the steel material per unit length while using a thin steel plate, and it is easy to secure the required initial strength while reducing the number of overlap of the damper elements. It is possible to increase the deformation value without generating tensile stress while maintaining the proof stress by the length of the filament opening, thereby allowing large deformation while absorbing greater energy.

In addition, since the damper element and the support plate coupled to the damper element are integrally formed while excluding the bolting means, the present invention can completely prevent the possibility that the damper element and the support plate act as a vibration damper such as a slip phenomenon.

Figure 1 compares the damping effects with initial stiffness and ductility capabilities.
2 is a perspective view showing an embodiment of a conventional steel damper.
3 is a perspective view showing an embodiment of a steel damper according to still another conventional technique.
4 is a perspective view and an exploded view showing a steel material damper according to an embodiment of the present invention.
5 is a perspective view showing each embodiment of the damping portion.
Figs. 6 and 7 are conceptual diagrams for explaining operation relationships according to respective shapes of the damper elements.
8 is a graph comparing soft capacities according to the shape of the damper element.
9 is a perspective view showing a damper element of the present invention acting in both directions.
10 is a perspective view illustrating a fixing unit according to an embodiment of the present invention.
11 is a perspective view showing still another embodiment of the present invention in which a shear connection member is attached to a support plate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in order to obscure or obscure the technical idea of the present invention due to the detailed description of the known structure in describing the present invention, the description of the structure of the above known structure will be omitted.

FIG. 4 is a perspective view of a steel damper 100 according to an embodiment of the present invention. FIG. 4 (b) is a perspective view of the damper 110 and the damping part 110, FIG. 5 is a perspective view showing each embodiment of the damping part 110, FIGS. 6 and 7 are views for explaining the operation relationship according to the shape of the damper element Fig.

As shown in FIG. 4, the steel damper 100 according to the present invention includes a damping unit 110 for absorbing vibration energy such as an earthquake while causing plastic deformation, and a damping unit 110 embedded in the structure, And a fixing unit 120 that enables the fixing unit 120 to be operated.

The damping unit 110 shown in Fig. 5 includes a pair of support plates 111, which are spaced apart from each other and opposed to each other and made of a steel plate, and a pair of support plates 111, And the damper element 112 described above.

The support plate 111 has a fixing part 120 attached to the back surface thereof and transmits a horizontal load due to an earthquake or the like transmitted through the structure to the damper element 112. The support plate 111 is made of a flat plate type steel plate.

The damper element 112 is formed of a plate-shaped steel plate having a curved cross section. More specifically, the damper element 112 may have an S-shaped cross section as shown in FIG. 5 (a) The center may be configured to have a convex cross-sectional shape to the upper portion or the lower portion.

The damper element 112 having such a curved section allows the initial stiffness and elongation performance to be maximized as compared with the plate damper element (corresponding to the prior art damping plate) in the above-mentioned prior art. This will be described in more detail as follows.

The main action of the damper is made by the damper element located at the center. When the damper element is made of a flat plate like the damping plate of the related art, if the damper element undergoes micro deformation due to the interlaminar deformation of the structure, (A) of Fig. 6 is divided into a shear force and a moment as shown in Fig. 6 (a).

6 (b), a tensile force acts in addition to the shear force and the moment, and this tensile force increases the length of the damper element, and at the same time, Thereby reducing the size.

For example, when the permissible maximum interlaminar transformation angle θ according to the Korean Building Construction Standard (KBC) is 0.015, which is applied to a general structure average reference height of 3000 mm, a permissible maximum interlayer displacement of 45 mm and a length of 50 mm, 6 (c), the length of the damper element is increased to 67.26 mm, while the cross-sectional area of the damper element is reduced by 25.7%.

The reduction of the cross-sectional area has a great influence on the proof stress of the damper element, and in particular, when the inter-story displacement is large, it causes a problem that the large deformation can not be coped with and suddenly breakage occurs.

That is, when tensile stress is generated in addition to the shear stress and the bending stress as described above, the total sum of the stress ratios for each permissible stress should be smaller than 1. However, the reduction of the sectional area is not limited to the tensile stress / The sum of these values may become larger than 1, resulting in a problem of stability (see the following equation).

From here

Is the allowable bending stress,

The allowable shear stress,

Is the allowable bending stress.

On the contrary, the damper element 112 of the curved cross section according to the present invention has the ability to cope with the interlayer displacement of 0.015 or more to enable large strain by preventing the tensile stress from occurring.

That is, the curved cross section of the damper element 112 has a length corresponding to the elongation of the length, and even when an unexpected large earthquake occurs, as shown in FIG. 7, Tensile force is not generated, so that it is possible to more stably cope with a large interlayer displacement (see the following equation).

8 shows a damper element having a curved cross section according to the present invention in which the ductility of the damper element (referred to as 'damper element A' in the description of the present invention) (B) ").&Lt; / RTI > For reference, the initial stiffness (K1) and the yield strength of the two damper elements

) Are assumed to be the same.

Comparing the deformation of two damper elements after yielding, the damper element (B) is reduced in strength by the effect of reducing the section due to the tensile force, while the damper element (A) Therefore, comparing the post-yielding results, the secondary stiffness value k2 of the damper element A is larger than that of the damper element B (K2 <k'2) ), The ductility is very good.

The damper element 112 according to the present invention having a curved cross section not only greatly increases the ductility capacity but also increases the initial strength by increasing the sectional area per unit length. The increase in the initial strength per unit member of the damper element 112 makes it possible to easily secure the required initial strength of the damping portion 110 while reducing the number of damper elements 112 installed.

9 (a) and 9 (b) show a damper element 112 of the present invention acting in both directions as described above. Fig. 9 (a) It is a perspective.

A general steel material damper using a thin steel plate as a damper element assumes that the damper element moves in the in-plane direction as described above. However, since the force generated by an earthquake or the like is not generated only in the in-plane direction of the damper element, the force acting in the out-of-plane direction may cause the thin steel plate to be twisted or torn to degrade or lose its function as a damper element have.

On the contrary, the damper element 112 having a curved section according to the present invention assumes that the damper element 112 behaves in the out-of-plane direction as shown in FIG. 9 (a) It can be multi-behaved corresponding to various directions of horizontal load such as seismic force, so that it has general versatility for the application range of not only the wall but also the connection portion of the column.

The damper element 112 of the curved section has both end portions fixedly attached to the support plate 111 and integrated with the fixing portion 120. With such an attachment and fixing means, Avoid slip phenomenon at the bonding site.

That is, the damper element 112 and the support plate 111 may be separately manufactured and integrated by welding, or a casting method may be used to integrate the damper element 112 and the support plate 111 from the beginning.

However, post-welding the damper element 112 and the support plate 111 may cause a decrease in strength and ductility as well as thermal deformation at the attachment site. Accordingly, most preferably, the damper element 112 and the support plate 111 are integrally formed by casting.

It has been recognized that fabrication by casting is inadequate as a method of manufacturing a steel damper for damping which requires high ductility because it lowers ductility. However, the inventor of the present invention has found that, through various experiments and observations, It is possible to fabricate a steel damper that exhibits sufficient ductility.

Securing the integrity of the damper element 112 and the support plate 111 by the casting can sufficiently ensure the damping performance of the damping part 110, Let it exert.

10 is a perspective view illustrating an exploded view of a fixing unit 120 according to an embodiment of the present invention.

The fixing unit 120 according to the present invention fixes and fixes the damping unit 110 to the vibration damper structure so that the horizontal load transmitted to the structure body is accurately transmitted to the damping unit 110, 10, the fixing unit 120 includes a fixing steel bar 121 symmetrically disposed on the upper and lower sides, respectively, as shown in FIG. 10, and a fixing belt 120 surrounding the fixing steel bar 121 And a fixing bracket 123 attached to one end of the fixing steel bar 121. [

The fixing bracket 123 is not particularly limited as long as it can attach the fixing steel bar 121 perpendicularly to the plane of the supporting plate 111. The fixing bracket 123 may have a vertical surface that can be joined to the supporting plate 111, It is preferable that the fixing steel bars 121 are formed as angles having a horizontal surface to which the reinforcing bars 121 can be placed and joined in the longitudinal direction. The application of such an angle improves the economical efficiency by making it possible to use a standard product which is generally manufactured.

The fixing unit 120 configured as described above is integrated with the damping unit 110 simply by welding or bolting the fixing bracket 123 to the back surface of the support plate 111.

11, a front end coupling member 124 such as a stud bolt may be further attached to the back surface of the support plate 111 to have a greater composite force between the support plate 11 and the vibration deadening structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it will be possible to carry out various modifications thereof. It is therefore intended that such modifications are within the scope of the invention as set forth in the claims.

Forced dampers; 100 damping portion; 110
A support plate; 111 Damper element; 112
A fixing unit; 120 settling steel; 121
Band steel; 122 Fixing brackets; 123
Shear connector; 124

Claims

A damping spring for damping which dissipates energy depending on displacement,
The steel material damper includes a damping portion 110 and a fusing portion 120;
The damping unit 110 includes a pair of support plates 111 which are spaced apart from each other and which are made of a steel plate and at least one damper element 111 having both ends fixed integrally with each other between the pair of support plates 111 112);
Wherein the damper element (112) is formed of a plate-like steel plate having a curved cross section.

The multi-behavioral plate steel damper of claim 1, wherein the damper element (112) has a S-shaped cross section.

The multi-behavioral plate steel damper of claim 1, wherein the damper element (112) has a cross-sectional shape with the center thereof being convex upward or downward.

The fixing device according to claim 1, wherein the fixing unit includes a fixing bar 121 symmetrically disposed on the upper and lower sides, a band bar 122 surrounding the fixing bar 121, And a fixation bracket 123 attached to one end of the plate-shaped plate steel damper.

The multi-acting plate steel damper according to claim 4, wherein the fixing bracket (123) is formed of an angle.

The multi-acting plate steel damper according to claim 1, wherein a plurality of shear connectors (124) are attached to the back surface of the support plate (111).