KR20200061761A - Composite damper using 3 dimensional steel stuss - Google Patents

Abstract

The present invention relates to a composite damper using a three-dimensional steel wire truss which fills the inside of a steel wire truss formed by three-dimensionally weaving a continuous steel wire with a filler making up a damper body to enclose the outside of the three-dimensional steel wire truss to allow the steel wire truss and the filler to act in a composite manner while retaining the advantages of a conventional Kagome truss to have strong axial stiffness and provide an excellent damping effect. The composite damper using a three-dimensional steel wire truss comprises: a damper body including a three-dimensional steel wire truss having a porous portion formed therein by three-dimensionally weaving a continuous steel wire and a synthetic resin filler filled in the porous portion of the three-dimensional steel wire truss and arranged to cover the outside; and an upper plate and a lower plate coupled to an upper and a lower portion of the damper body.

Description

Composite damper using 3 dimensional steel stuss}

The present invention fills the inside of a steel wire truss formed by weaving continuous steel wires in three dimensions, but by constructing a damper body so that the filling material surrounds the outside of the three-dimensional steel wire truss, the steel wire trusses and fillers are maintained while maintaining the advantages of the existing cargo truss. It is a composite damper using a three-dimensional steel wire truss that can exert excellent damping effect by acting in combination and has strong axial rigidity.

As the frequency of earthquakes has increased in recent years and the intensity of earthquakes has increased, the demand for seismic reinforcement of existing buildings has increased rapidly.

In order to reinforce the existing frame, a technique has been developed to install a damper inside the frame to resist lateral forces.

As an example, a damper capable of minimizing damages to a structure by dissipating energy by a high-damping rubber is frequently used by constructing a high-damping rubber, which is a viscoelastic chain, by laminating it with a steel plate (Registered Patent No. 10-1348577 Arc etc.). However, in the case of the above technique, the stiffness of the damper is excessively large, causing a burden on other members, such as a foundation, and a large amount of steel material, resulting in poor economic efficiency.

In order to solve this problem, a damper using Kagome Truss, a three-dimensional porous structure having a small weight compared to a volume, maintaining stable rigidity against a high level of deformation, and having excellent energy dissipation ability, was developed (Patent Registration No. 10). -1155232).

The three-dimensional porous structure is composed of continuous wires, and is formed as a three-dimensional structure having pores and used as a damper member.

However, these three-dimensional porous structures have poor elastic damping effect compared to deformation because of their elastic behavior. In addition, there is a limitation that it is difficult to apply to a member requiring poor axial rigidity due to poor compression performance.

In order to solve the above problems, the present invention is to provide a synthetic damper using a three-dimensional steel wire truss having excellent damping ability and strong axial rigidity while maintaining the advantages of the existing Kagome truss.

The present invention according to a preferred embodiment is a damper consisting of a three-dimensional steel wire truss with a porous portion formed by weaving a continuous steel wire in three dimensions, and a synthetic resin filler filled to surround the outside of the porous portion of the three-dimensional steel wire truss. main body; And an upper plate and a lower plate respectively coupled to upper and lower portions of the damper body. It provides a synthetic damper using a three-dimensional steel wire truss, characterized in that consisting of.

The present invention according to another preferred embodiment provides a composite damper using a three-dimensional steel wire truss, characterized in that the three-dimensional steel wire trusses are respectively joined by welding with an upper plate and a lower plate.

The present invention according to another preferred embodiment provides a synthetic damper using a three-dimensional steel wire truss, characterized in that a lead core is provided in the center of the damper body.

The present invention according to another preferred embodiment is provided with an upper stopper on both sides of the damper body under the upper plate, and on both sides of the damper body above the lower plate, a lower stopper at an inner or outer position of the upper stopper and an upper stopper. It provides a synthetic damper using a three-dimensional steel wire truss, characterized in that provided to be spaced apart.

The present invention according to another preferred embodiment provides a synthetic damper using a three-dimensional steel wire truss, characterized in that a damping bar embedded in the inside of the damper body is provided at the lower portion of the upper plate and the upper portion of the lower plate.

According to the present invention has the following effects.

First, the continuous steel wire is woven in three dimensions to fill the porous portion of the three-dimensional steel wire truss with a porous portion formed therein, but by constructing a damper body so that the filling material surrounds the outside of the three-dimensional steel wire truss, the three-dimensional steel wire truss and The filler may act in combination to exert a damping effect. That is, it is possible to secure compression and tensile resistance performance and improve ductility by a filler while retaining lateral rigidity by a three-dimensional steel wire truss. Therefore, it is possible to provide a synthetic damper using a three-dimensional steel wire truss having excellent damping ability and strong axial rigidity while maintaining the advantages of the existing cargo truss.

Second, when the lead core is provided in the center of the damper body, in the event of an earthquake, the primary filler, secondary lead core, and tertiary three-dimensional steel wire truss bear the load, allowing multi-stage seismic behavior.

Third, when stoppers are provided on both right and left sides of the damper body, even if excessive lateral displacement occurs, damage to the synthetic damper can be prevented and excessive displacement of the structure can be prevented.

Fourth, in the case where the damping bar is embedded in the inside of the damper body between the upper and lower plates, the damper body resists against a small lateral load, and the damping bar and the damper body behave in a complex manner with respect to the lateral load over a medium scale, depending on the strength of the lateral load. Energy can be absorbed and damped step by step.

1 is a front view showing a composite damper using a three-dimensional steel wire truss of the present invention.
2 is a view showing a manufacturing process of a synthetic damper.
Figure 3 is a front view showing a frame that is reinforced using a bracing material combined with a synthetic damper of the present invention.
Figure 4 is a front view showing a frame that is reinforced using a reinforcement wall combined with a synthetic damper of the present invention.
5 is a front view showing a synthetic damper with a lead core.
Figure 6 is a front view showing a synthetic damper with a stopper.
7 is a cross-sectional view showing a synthetic damper with a damping bar.
8 is a view showing the behavior of a synthetic damper by a damping bar.
9 is a view showing an embodiment of a composite damper damping bar is provided in a plurality of rows.

Hereinafter, the present invention will be described in detail according to the accompanying drawings and preferred embodiments.

1 is a front view showing a synthetic damper using a three-dimensional steel wire truss of the present invention, Figure 2 is a view showing the manufacturing process of the synthetic damper. And Figure 3 is a front view showing a frame that is reinforced using a bracing material combined with a synthetic damper of the present invention, Figure 4 is a front view showing a frame that is reinforced using a reinforced wall to which the synthetic damper of the present invention is combined.

As shown in Figure 1, the present invention, a synthetic damper using a three-dimensional steel wire truss weave a continuous steel wire in three dimensions, a three-dimensional steel wire truss 111 with a porous portion 112 formed therein and the three-dimensional steel wire truss ( A damper body 11 composed of a synthetic resin filler 113 that is filled in the porous portion 112 of 111 and is provided to surround the outside; And an upper plate 12 and a lower plate 13 coupled to upper and lower portions of the damper body 11, respectively. It is characterized by consisting of.

The present invention is to provide a synthetic damper using a three-dimensional steel wire truss having excellent damping ability and strong axial rigidity while maintaining the advantages of the existing Kagome truss.

The composite damper 1 using the three-dimensional steel wire truss of the present invention is composed of a damper body 11 and upper and lower plates 12 and 13.

The damper body 11 is woven into a continuous steel wire in three dimensions, and is filled in the three-dimensional steel wire truss 111 having a porous portion 112 formed therein and the porous portion 112 of the three-dimensional steel wire truss 111, and external. It is composed of a synthetic resin filler 113 provided to surround the.

The three-dimensional steel wire truss 111 is formed by weaving continuous steel wires in three dimensions to have a predetermined height and width, and a plurality of porous portions 112 are formed therein.

The three-dimensional steel wire truss 111 allows the damper to have lateral stiffness while performing elastic behavior.

The filling material 113 is filled in the porous portion 112 of the three-dimensional steel wire truss 111 and simultaneously surrounds the outside of the three-dimensional steel wire truss 111.

The filler 113 does not simply protect the three-dimensional steel wire truss 111, but functions as a damper itself.

That is, the present invention is a composite damper 1 in which the three-dimensional steel wire truss 111 and the filler 113 exert a complex damping effect.

The filler 113 not only compensates for the compressive and tensile resistance performance, which is a disadvantage of the steel wire truss, but also improves the ductility of the damper, thereby increasing the amount of energy dissipation when lateral displacement occurs, and improving the resilience.

In addition, since the filler 113 surrounds the outside of the three-dimensional steel wire truss 111, a fine slip occurs in the steel wire inside the filler 113 when a lateral displacement occurs, so that additional damping effect can be exhibited by friction.

The filler 113 may be made of a synthetic resin material such as silicone rubber.

The silicone rubber is excellent in heat resistance, cold resistance, chemical resistance and the like, and has excellent durability.

The upper plate 12 and the lower plate 13 are coupled to the upper and lower portions of the damper body 11, respectively.

The upper plate 12 and the lower plate 13 may be made of metal or the like.

The synthetic damper using the three-dimensional steel wire truss of the present invention can be manufactured in the following order.

First, as shown in (a) of FIG. 2, the upper plate 12 and the lower plate 13 are respectively coupled to the upper and lower portions of the three-dimensional steel wire truss 111 in which the continuous steel wire is woven in three dimensions.

And, as shown in Figure 2 (b), the mold 2 is installed on the outside of the three-dimensional steel wire truss 111, and the filler 113 is injected therein.

Finally, as shown in (c) of FIG. 2, after curing the filler 113, the mold 2 is demolded to complete the fabrication of the synthetic damper 1.

By using the synthetic damper 1 of the present invention, it is possible to reinforce an existing frame comprising a beam 3 and a pillar 4.

That is, as shown in FIG. 3, the present invention can be reinforced by combining the synthetic damper 1 of the present invention on one side of the beam 3 and combining the bracing material 5 on the synthetic damper 1.

In addition, as shown in FIG. 4, when the reinforcement wall 6 is installed inside the frame to reinforce the existing frame, it is also possible to install the synthetic damper 1 in the middle of the reinforcement wall 6 to reinforce it.

In particular, in the case of reinforcing by the reinforcing wall 6, it should be possible to support not only the shear force due to the lateral load but also the vertical load. The damper body 11 of the synthetic damper 1 of the present invention is excellent in axial stiffness through the synthesis of the three-dimensional steel wire truss 111 and the filler 113, and can sufficiently exhibit the performance of such a reinforcing wall 6.

The three-dimensional steel wire truss 111 may be coupled to the upper plate 12 and the lower plate 13 by welding, respectively.

As described above, when the three-dimensional steel wire truss 111 itself is combined with the upper plate 12 and the lower plate 13 by welding, the lateral displacement of the upper and lower plates 12 and 13 is directly transferred to the damper body 11. In addition to being able to deliver, the synthetic damper 1 can retain tensile resistance performance.

Particularly, in the case of the existing damper, the damping effect may be lowered when the plate is separated from the damper body 11 when rotation displacement occurs. On the other hand, in the present invention, since the three-dimensional steel wire truss 111 is welded to the upper and lower plates 12 and 13 at a plurality of points, there is no lifting phenomenon between the upper and lower plates 12 and 13 and the damper body 11.

5 is a front view showing a synthetic damper with a lead core.

As shown in FIG. 5, a lead core 14 may be provided at the center of the damper body 11.

The existing LRB (Lead Rubber Bearing) seismic isolation device is manufactured by injecting a lead plug into a laminated rubber stacked with iron plate and rubber, and lengthens the natural cycle of the upper structure to reduce the magnitude of the seismic force caused by the upper structure. It is a kind of seismic support.

The lead core formed in such an LRB seismic isolation device controls low-level vibrations such as wind load to initial stiffness. In addition, for large horizontal forces generated during an earthquake, vibration energy is attenuated by absorbing energy and converting it into thermal energy by plastic deformation of the lead core. Accordingly, stability is secured against the behavior that may occur in the structure.

However, the conventional LRB seismic isolation device has a disadvantage in that it does not have any resistance performance when the design displacement exceeds or if the seismic isolation device is lifted.

In addition, the lateral stiffness and axial stiffness are in charge of the lead core and the laminated rubber, respectively, and the iron plate of the laminated rubber simply resists the vertical load and does not have any lateral rigidity against the horizontal load.

Therefore, in the present invention, by using the damper body 11 composed of the three-dimensional steel wire truss 111 and the filler 113 instead of the laminated rubber in the existing LRB seismic isolation device, the entire synthetic damper 1 has lateral rigidity and is damped. The effect was increased. Accordingly, resistance performance can be maintained even when the lateral load is excessive.

In addition, in the event of an earthquake, the filling material 113 as the primary, the lead core 14 as the secondary, and the three-dimensional steel wire truss 111 as the third are burdened, and multi-stage seismic behavior is possible.

Since the upper and lower plates 12 and 13 of the synthetic damper 1 are fixed by a three-dimensional steel wire truss 111, the lateral stiffness is retained at the bonding surface between the damper body 11 and the upper and lower plates 12 and 13, , It is possible to prevent the lifting of the upper and lower plates (12, 13).

6 is a front view showing a synthetic damper with a stopper.

As shown in FIG. 6, upper dampers 15a are provided on both sides of the damper body 11 under the upper plate 12, and on both sides of the damper body 11 above the lower plate 13. The lower stopper 15b may be configured to be provided spaced apart from the upper stopper 15a at an inner or outer position of the upper stopper 15a.

In some cases, if the lateral load is excessive, the design lateral displacement of the damper may be exceeded.

Accordingly, stoppers 15a and 15b are installed on the left and right sides of the damper body 11 to prevent damage to the synthetic damper 1 and to prevent excessive displacement of the structure.

In this case, when the lateral load occurs, the damper body 11 primarily controls the lateral displacement of the structure. And when a lateral load of more than the design strength occurs, the stoppers 15a and 15b can control the lateral displacement secondaryly.

7 is a cross-sectional view showing a synthetic damper with a damping bar, FIG. 8 is a view showing the behavior of the synthetic damper by the damping bar, and FIG. 9 is a view showing an embodiment of a synthetic damper having a damping bar in a plurality of rows .

As shown in FIGS. 7, 8, etc., a damping bar 16 embedded in the inside of the damper body 11 may be provided at the lower portion of the upper plate 12 and the upper portion of the lower plate 13, respectively.

Only the damper body 11 composed of the three-dimensional steel wire truss 111 and the filling material 113 may have a slightly weaker lateral stiffness, resulting in a large initial deformation.

Therefore, by combining the damping bar 16 inside the upper and lower plates 12 and 13 of the synthetic damper 1, the damping bar 16 is inserted into the porous portion 112 of the three-dimensional steel wire truss 111, and then The filling material 113 filling the study 112 may be configured to be buried inside.

As shown in FIGS. 7 and 8(a), the damping bar 16 is coupled to the upper and lower plates 12 and 13 in a cantilever form, and can be configured to resist the initial deformation by cantilever stiffness. .

In this case, for the initial small-scale lateral load, the upper and lower parts of the damper body 11 provided with the damping bar 16 do not behave largely due to its rigidity. In addition, lateral displacement occurs only in the central portion of the damper body 11 (θ ₁ ).

In addition, since the height of the damper body 11 between the damping bars 16 is reduced by the upper and lower damping bars 16, the initial lateral stiffness is increased.

When the lateral load becomes larger, the damper body 11 including the damping bar 16 as shown in FIG. 8(b) dissipates energy while causing bending deformation in the upper and lower portions (θ ₃ ).

At this time, an additional lateral displacement occurs in the center of the damper body 11 (θ ₁₊₂ ).

In addition, when bending deformation of the damping bar 16, slip occurs between the damping bar 16 and the filler 113, thereby exhibiting additional energy dissipation capability.

That is, the damper body 11 between the upper and lower damping bars 16 resists the lateral load of a small scale, and the upper and lower damping bars 16 and the damper body 11 act together in a complex manner for lateral loads of medium or larger size. Absorption and attenuation occur.

Therefore, it is possible to respond step by step according to the strength of the lateral load while reducing the initial deformation.

The damping bar 16 may use a round bar shape or a flat bar shape in consideration of required design stiffness and the size of the porous portion 112 of the damper body 11. However, it is preferable to use flat iron arranged in the width direction of the damper body 11 so that deformation is easy for lateral loads of a predetermined scale or more.

The damping bar 16 may be arranged such that a plurality of the dampers 1 are spaced apart from each other along the longitudinal direction.

9, the damping bar 16 may be arranged in a plurality of rows to be spaced apart from each other along the width direction of the synthetic damper 1 according to the width of the damper body 11, initial design rigidity, and the like.

1: Synthetic damper 11: Damper body
111: 3D steel wire truss 112: perforated
113: Filling material 12: Upper plate
13: lower plate 14: lead core
15a: upper stopper 15b: lower stopper
16: Damping bar 2: Mold
3: beam 4: pillar
5: Bracing material 6: Reinforcement wall

Claims (5)

3D steel wire truss 111 having a porous portion 112 formed therein by weaving continuous steel wires in 3D, and a synthetic resin filler provided to be filled in the porous portion 112 of the 3D steel wire truss 111 and to surround the outside A damper body 11 composed of 113; And
An upper plate 12 and a lower plate 13 respectively coupled to upper and lower portions of the damper body 11; Synthetic damper using a three-dimensional steel wire truss, characterized in that consisting of.
In claim 1,
The 3D steel wire truss 111 is a synthetic damper using a 3D steel wire truss, characterized in that the upper plate 12 and the lower plate 13 are respectively joined by welding.
In claim 2,
Composite damper using a three-dimensional steel wire truss, characterized in that the lead core 14 is provided in the center of the damper body (11).
In claim 1,
On both sides of the damper body 11 under the upper plate 12, upper stoppers 15a are provided,
Three-dimensional, characterized in that the lower stopper 15b is provided so that the lower stopper 15b is spaced apart from the upper stopper 15a in the inner or outer position of the upper stopper 15a on both sides of the lower plate 13. Synthetic damper using steel wire truss.
In claim 1,
Synthetic damper using a three-dimensional steel wire truss, characterized in that a damping bar (16) embedded in the inside of the damper body (11) is provided at the lower portion of the upper plate (12) and the upper portion of the lower plate (13).

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