KR200467789Y1 - The plastic damper for the earthquake-proof - Google Patents

Abstract

The present invention relates to a plastic type seismic damper, which absorbs vibration by using the property of deforming the seismic damper installed to improve the seismic capacity of the building or to reinforce the insufficient seismic capacity by the tensile force or the compressive force generated by the earthquake. Developed to allow attenuation;
For the seismic reinforcement of steel structures or reinforced concrete buildings, two vertical frames and horizontal frames, which are installed at the periphery of a section forming a square frame and connected to each other, and the inner side of the rectangular frame formed by the frame A seismic damper which is connected to the vibration damping caused by the earthquake to cancel;
The seismic damper is one end is fixed to each of the two upper edges of the vertical frame and the horizontal frame meets, the other end is two connecting frames extending inclined in a direction facing each other;
A moving frame formed in the form of a bar extending horizontally and slightly spaced from the bottom and fixed at the bottom of the two connecting frames in the center;
The lower part is divided into two by the incision groove which is vertically cut down from the center and is formed vertically, and the upper part has the same width as the incision groove, and at least two buffer holes are formed to be horizontally long incision and are adjacent to each other. Plastic ribs connecting both sides are formed between the buffer holes and between the buffer hole, the upper end, and the top of the incision groove, and first fixing holes are formed on both sides of the bisected lower part, respectively, respectively formed at both ends of the moving frame. It relates to a plastic-type seismic damper, characterized in that consisting of two fixing plate and two plastic plate hinged by a fixing pin to a third fixing hole formed at the upper end of the fixing frame protruding upward from the horizontal frame.

Description

Plastic damper for the earthquake-proof}

The present invention relates to a plastic type seismic damper, which will be described in more detail by using the property of deforming the seismic damper installed to improve the seismic capacity of the building or to reinforce the insufficient seismic capacity by the tensile force or the compressive force generated by the earthquake. The present invention relates to a plastic type seismic damper developed to be able to absorb or attenuate vibration.

The recent earthquake in neighboring Nara Japan is an example of how much human damage caused by earthquakes is, but compared with Japan, the current earthquake preparedness for the earthquake is very weak.

Most people think that Korea is relatively safe from earthquakes, but historical records show that an earthquake that occurred in the Gyeongju area of 779 (15 years of Silla Hyegong) occurred at a scale of 8 or more. The earthquake that occurred near Ilju was felt as a large earthquake in Seoul and Jeolla-do, and the Bonghwadae of Daegu, Andong, Yeongdeok, and Gimhae collapsed. have.

Since the earthquake observation, the magnitude 5.2 is the largest record, and it is recognized that a relatively strong earthquake does not occur.However, the earthquake record of about 2000 years shows that the magnitude (MMI) 5 or more is 400 times and the magnitude (MMI). It can be seen that more than 6 circuits are never an earthquake-safe area.

However, in Korea, seismic design is mandatory only for structures with more than 6 floors and total floor area of 10,000m2 since 1988, but buildings, bridges, tunnels, etc. built before 1988 are virtually unprotected from earthquake damage. In the case of buildings with less than 10,000m2, there is no proper countermeasure.

Especially in the case of schools, there are always a lot of students and staff. These buildings are the places where a lot of human accidents occur in the event of an earthquake, and when disasters occur, they are often used as shelters. to be.

Therefore, the technology to reinforce the lack of seismic capacity by installing in old buildings or buildings that do not have earthquake resistance design for earthquakes in Korea is a method commonly used in Japan. there was.

This method installs hydraulic or viscous dampers inclined to the square wall of the building to amplify 2-3 times the floor deformation during earthquake and transmits them to hydraulic or viscous dampers to improve the efficiency of seismic energy and absorb it.

Korean Patent Application No. 10-2009-003393 shows an example of reinforcing a building by a toggle damper, where one end is connected to three corners of a square steel frame constituting the building compartment and three are connected to the other end. See seismic reinforcement methods.

At this time, the price of hydraulic or viscous dampers is expensive, and if it is left unmanaged for a long time without installation, corrosion or internal oil spills out, and its performance is deteriorated. have.

The present invention has been developed to solve the above problems, the object is to develop a plastic type seismic damper that can be easily installed and reinforced in existing buildings lacking seismic design.

In addition, the present invention is to develop a plastic type seismic damper which can prevent the plastic sheet material from buckling due to the vibration perpendicular to the direction to be absorbed and thereby impair the function.

In order to achieve the above object, the present invention has two vertical frames and a horizontal frame, each of which is installed at the periphery of a section forming a square frame for seismic reinforcement of a steel frame structure or reinforced concrete building and connected to each other's ends, and A seismic damper for interconnecting the inner side of the rectangular frame formed by the frame to offset the vibration caused by the earthquake;

The seismic damper is one end is fixed to each of the two upper edges of the vertical frame and the horizontal frame meets, the other end is two connecting frames extending inclined in a direction facing each other;

A moving frame formed in the form of a bar extending horizontally and slightly spaced from the bottom and fixed at the bottom of the two connecting frames in the center;

The lower part is divided into two by the incision groove which is vertically cut down from the center and is formed vertically, and the upper part is formed with one or more buffer holes which are horizontally long and have the same width as the incision groove. One or more plastic ribs connecting both sides are formed between the buffer holes and between the buffer hole and the upper end and the incision groove, and first fixing holes are formed on both sides of the bisected lower part, respectively, respectively formed at both ends of the moving frame. It characterized in that it consists of two plastic plate material hinged by a fixing pin to the second fixing hole and the third fixing hole formed on the upper end of the fixing frame protruding upward from the horizontal frame.

In addition, a buffer groove having the same length as the buffer hole is further formed in the center of the upper surface of the plastic plate member.

In addition, the first coupling hole is arranged on both sides of the upper side of the firing plate material, the four are arranged in a rectangular lattice;

A vertical portion having a second coupling hole corresponding to the first coupling hole and a recessed groove formed at a center of an upper end and a lower end of the second coupling hole at least not less than the length of the buffer groove, and fixed horizontally to the outer center of the vertical portion; Two anti-bending bracket consisting of a plate-shaped horizontal portion is characterized in that the additional fixed mounting by the pin or bolt penetrating the first and second coupling holes.

In addition, the fixed frame and the moving frame is composed of a pair disposed in parallel in the front and rear direction, characterized in that the plastic plate member and one end of the connecting frame is sandwiched therebetween and then coupled.

As described above, the present invention has an effect of stabilizing the building more structurally by effectively absorbing energy generated when an earthquake occurs by easily reinforcing and constructing a building that is not seismic design or insufficient.

In addition, it is possible to effectively prevent the firing plate material is damaged by the energy generated in the direction perpendicular to the direction to be absorbed to lose its function has the effect of improving durability.

In addition, by replacing only the low-cost plastic plate deformed after the earthquake situation, there is an effect that can be used permanently to restore the original function again.

1 is a use state according to an embodiment of the present invention
2 is a conceptual diagram according to an embodiment of the present invention
3 is a perspective view showing an example of a plastic plate according to an embodiment of the present invention
4 is a view showing the effective stress and the maximum strain distribution when a force acts on the plastic sheet according to FIG.
5 is a partially exploded perspective view according to another embodiment of the present invention
Figure 6 is a perspective view showing a plastic plate and the bending prevention bracket according to another embodiment of the present invention
7 is a partially exploded perspective view according to another embodiment of the present invention
8 is a side view showing the coupling portion of the plastic plate according to another embodiment of the present invention
9 is a view showing the effective stress and maximum strain distribution when the force applied to the plastic sheet according to another embodiment of the present invention
10 is a perspective view showing another application example of the plastic plate member according to an embodiment of the present invention
11 is a view showing the distribution of the effective stress and the maximum strain when a force acts on the plastic sheet according to FIG.
12 is a load displacement curve of the first test specimen according to the basic embodiment of the present invention
13 is a load displacement curve of the second test specimen according to the basic embodiment of the present invention
Figure 14 is a photograph showing the maximum tensile, compression and fracture state of the test body according to the basic embodiment of the present invention
15 is a load displacement curve of a first test specimen according to another embodiment of the present invention
16 is a load displacement curve of the second test specimen according to another embodiment of the present invention
Figure 17 is a photograph showing the maximum tensile, compression and fracture state of the test body according to another embodiment of the present invention
18 is a load displacement curve of a first test body according to another embodiment of the present invention
19 is a load displacement curve of a second test body according to another embodiment of the present invention
20 is a photograph showing the maximum tensile, compression and fracture states of a test specimen according to another embodiment of the present invention

Hereinafter, the structure of the present invention will be described in detail so that a person skilled in the art can easily understand and reproduce the same.

1 is a state diagram according to an embodiment of the present invention, Figure 2 is a conceptual diagram according to an embodiment of the present invention, the outer frame of one section forming a rectangular frame for seismic reinforcement of steel structure or reinforced concrete building Two seismic frames (1) and a horizontal frame (2), which are installed and connected to each other's ends, and the seismic resistance to absorb and offset vibration generated by the earthquake by interconnecting the inner side of the rectangular frame formed by the frame. In the damper 3;

The seismic damper (3) has one end fixed to each of the two upper edges where the vertical frame (1) and the horizontal frame (2) meet, and the other end is two connecting frames (31) extending inclined in a direction facing each other. and;

A moving frame 32 which is formed in the form of a horizontally extending bar and is slightly spaced apart from the bottom surface and in which the lower ends of the two connecting frames 31 are fixed;

Two plastics are rotatably coupled to one end of both ends of the movable frame 32, and the other end of the movable frame 32 is rotatably coupled to an upper end of the fixed frame 34 which protrudes upward from the horizontal frame 2. It consists of the board | plate material 33.

At this time, when the vibration or impact in the left and right directions from the front of the building (4) occurs, the rectangular frame consisting of the vertical frame (1) and the horizontal frame (1) the force acts in the direction to be pressed in the form of a parallelogram. It acts as a movement in the left and right direction of the movable frame 32 via the connecting frame 31.

At this time, since the connecting frame 32 is fixed by the firing plate member 33, the relative force is two between the firing plate member 33 and the connecting frame 32, and the firing plate member 33 and the fixing frame 34. It acts as a tensile or compressive force between the connections.

At this time, if the deformation between the connecting parts to form a relatively easy state, the energy due to the earthquake is to cancel the energy by deforming the plastic plate 33.

In this case, the plastic plate 33 should be manufactured as a result of more dynamic and precise experiments even in the selection of size, material, and thickness, including the deformable connection part in addition to the compressive and tensile forces. .

3 is a perspective view showing an example of a fired plate material according to an embodiment of the present invention, Figure 4 is a view showing the effective stress and the maximum strain distribution when a force acts on the fired plate material according to Figure 3, vertically The lower portion is divided into two by the incision groove 331 vertically cut down from the center is formed in a rectangular plate shape, the upper portion has the same width as the incision groove 331 two or more buffer holes 332 long horizontally ) Is formed, and plastic ribs 333 are formed between the adjacent buffer holes 332 and between the buffer holes 332 and the upper end of the upper end and the cutting groove 331, and the bilateral lower portions First fixing holes 334 are formed to protrude upward from the second fixing holes 321 (refer to FIG. 5) and the horizontal frame 2 (refer to FIG. 5) respectively formed at both ends of the movable frame 32. Of the extending fixed frame 34 (see FIG. 5). Two plastic plate members 33 hinged to the third fixing holes 341 (see FIG. 5) formed at the top by the fixing pins 335 (see FIG. 5) are illustrated.

The rotatable hinge coupling by the fixing pin 335 is because the tensile force or the compressive force by the moving frame 32 is not a simple one-way force but the bending moment acts on the plastic plate 33.

An important configuration here may be referred to as a plastic rib 333 formed by the buffer hole 332 and the buffer hole 332.

With regard to the length and thickness of the plastic rib 333 and the force acting on the material, it is determined how effectively the plasticity can absorb energy due to the earthquake. As described above, the plastic ribs 333 having two buffer holes 332 and formed accordingly have at least the same width as the uppermost and lowermost ribs so that the most effective force is applied.

That is, in FIG. 4, a tensile force is generated as an example, and when a tensile force is applied, a compressive force acts on the plastic rib 333 at the lower edge of the plastic rib 333 at the lower boundary thereof. When the compressive force is applied, the opposite force is applied to each.

The red part shown in FIG. 4 is a part where stress is concentrated or a lot of deformation occurs, and the blue part is a part that shows little stress or little deformation, which is a structural analysis by experiment.

At this time, the present invention proposes an embodiment in which a buffer groove 336 having the same length as the buffer hole 332 is further formed in the center of the upper surface of the plastic plate 33.

According to the embodiment, when the bending moment is applied, when the upper end is formed in one plane (a straight line in the front view) without the buffer groove 336, the deflection is unbalanced, or the upper and lower plastic ribs 333 are respectively formed. This is to solve the problem that it is difficult to have the same stress distribution.

Figure 5 is a partially exploded perspective view according to another embodiment of the present invention, the fixed frame 34 and the moving frame 32 is composed of a pair arranged in parallel in the front and rear direction, the plastic plate 33 and the connecting frame One end of (31) is shown sandwiched between and then bonded.

Generally, seismic waves are divided into transverse waves and longitudinal waves. In the case of transverse waves, when the vertical direction of the moving frame 32 acts in a longitudinal direction, a force acts in a direction in which the connection part is separated, thereby causing a problem such as separation or structural weakening. The embodiment is presented for more stable coupling.

At this time, there is also a method of arranging the two plastic plates 33 back and forth, but in this case, the above-described problem occurs in the coupling portion of the connecting frame 31 and the moving frame 32, so that the application of the embodiment is applied for stable coupling. desirable.

6 is a perspective view showing a plastic plate and a bending prevention bracket according to another embodiment of the present invention, Figure 7 is a partially exploded perspective view according to another embodiment of the present invention, Figure 8 is another embodiment of the present invention 9 is a side view showing the coupling portion of the plastic plate according to the present invention, and FIG. 9 is a diagram showing an effective stress and maximum strain distribution when a force is applied to the plastic plate member according to another embodiment of the present invention. First coupling holes 337 having four quadrangular lattice shapes are further formed on both sides;

Both sides have a vertical portion in which a second coupling hole 351 corresponding to the first coupling hole 337 and a recessed groove 352 are formed at the center of the top and bottom of the buffer groove 336 at least not less than the length of the buffer groove 336. Two anti-bending brackets (35) consisting of a flat portion (353) and a plate-shaped horizontal portion (354) fixed in the horizontal direction in the outer center of the vertical portion (353) the first and second coupling holes (337, 351) An embodiment is further fixedly mounted by a pin or bolt penetrating).

The embodiment does not sufficiently solve the energy due to the earthquake when the plastic plate 33 does not act as a force in the direction in which the gap between the incision grooves 331 is widened or narrowed, and an out-of-plane driving, that is, a buckling force is applied. There is a risk of loss of functionality.

Accordingly, the present application can prevent the buckling phenomenon by increasing the ultimate strength and stiffness of the plastic plate member 33 by processing the existing 'T' shaped steel and bonding it to the front and rear directions of the plastic plate member 33. have.

10 is a perspective view showing another application example of the fired plate material according to an embodiment of the present invention, Figure 11 is a view showing the effective stress and the maximum strain distribution when the force acts on the fired plate material according to Figure 10, The length of the cutout groove 331 of the plate 33 is relatively reduced and the vertical width of the buffer hole 332 is shown to increase the structure.

Although the width of the plastic ribs 333 is the same in the above structure, both of the first fixing holes 334 and the plastic ribs 333 at the lower ends are closer to each other, and thus, the plastic ribs 333 are closer to each other.

As described above, the element that determines the effect of the fired plate member 33 is not only the material and the thickness of the fired plate member 33, but also the width and thickness and the length of the fired rib 333 and the fired rib 333. Many factors, including number and positional relationships, must be combined.

12 is a load displacement curve of the first test specimen according to the basic embodiment of the present invention, Figure 13 is a load displacement curve of the second test specimen according to the basic embodiment of the present invention, Figure 14 is a basic embodiment of the present invention Is a photograph showing the maximum tensile and compression and fracture states of the test specimen according to the test specimen;

15 is a load displacement curve of the first test specimen according to another embodiment of the present invention, Figure 16 is a load displacement curve of the second test specimen according to another embodiment of the present invention, Figure 17 is another embodiment of the present invention Is a photograph showing the maximum tensile and compression and fracture states of the test specimen according to the test specimen;

18 is a load displacement curve of the first test specimen according to another embodiment of the present invention, FIG. 19 is a load displacement curve of the second test specimen according to another embodiment of the present invention, and FIG. 20 is yet another embodiment of the present invention. It is a photograph showing the maximum tensile, compression and fracture state of the test specimen according to the embodiment.

According to these test results, regardless of the shape of the test specimens, all specimens showed stable hysteresis characteristics with increasing strength until the steel deflection damper fractured after sufficient plastic deformation.

In addition, most specimens were tensilely broken at the lower member of the horizontal part while the cross section of the lower member of the horizontal part was reduced by repeated bending deformation.

In addition, in the case of the test body provided with the buckling preventing member shown in Figs. 15 to 20, it was confirmed that all the test bodies slipped the contact surface between the buckling preventing member and the damper portion.

The results of the examination of the ratio of the cumulative inelastic displacement to the yield displacement of each specimen are shown in Table 1 below.

Test body Cumulative Inelastic Displacement (A, mm) Yield Displacement (B, mm) Ratio (A / B) Basic embodiment One 532.54 1.74 305.43 2 531.96 1.60 333.33 Other Embodiments One 521.99 2.21 236.14 2 519.17 2.15 241.15 Another embodiment One 527.44 1.80 293.30 2 525.47 1.61 327.16

In this test, all specimens were found to have sufficient ductility, with the ratio of cumulative inelastic displacement to yield displacement exceeding 200 times, which is the criterion of conformity of performance test results presented in AISC / Seismic Provisions for Structural Steel Buildings (2005). .

In addition, the maximum strength and maximum amplitude for each specimen are shown in Table 2.

Test body Amplitude (mm) Strength (kN) Seal compression Seal compression Basic embodiment One 20.63 -20.63 263.2 -257.8 2 20.63 -20.63 264.2 -260.3 Average 20.63
(0.63%) -20.63
(0.63%) 263.7 -259.1 Other Embodiments One 24.75 -24.75 242.2 -241.7 2 24.75 -24.75 238.8 -247.1 Average 24.75
(0.75%) -24.75
(0.75%) 240.5 -244.4 Another embodiment One 16.5 -16.5 409.7 -412.1 2 16.5 -16.5 405.3 -409.2 Average 16.5
(0.50%) -16.5
(0.50%) 407.5 -410.7

Here, the maximum amplitude is the repeated amplitude of two cycles without breaking, and the numbers in parentheses represent the displacement between floor displacements based on 3.3m, which is the height of a typical Korean school building.

Numerically, it is reasonable to see that the deformation capacity of the test specimen according to another embodiment is the best.

Considering that the limit of inter-floor displacement ratio of the domestic structural structural design standard is 1.0 ~ 2.0% for each seismic class, the overall deformation capacity may be somewhat small.However, the inter-layer displacement ratio is deformed according to the experiment due to the excellent displacement reduction performance. I could confirm that it came within the ability.

The performance test results of each test body in these tests are summarized as follows.

end. Test specimen according to the basic embodiment

 In the first cycle of compression displacement 16.50mm, bending deformation occurred with the naked eye on the horizontal lower part.

 In the first cycle of 20.63 mm of tensile displacement, the necking observed with the naked eye occurs in the lower part of the horizontal part.

Substantial flexural deformation of the lower part of the test specimen and the strength of the test specimen is reduced after the lower part of the horizontal member is broken in the first cycle of 24.75 mm of tensile displacement after 2 cycles of inelastic deformation after the necking.

I. Test body according to another embodiment

 In the first cycle of compression displacement 20.63mm, bending deformation occurs with the naked eye on the horizontal lower part.

 Tensile Displacement 24.75mm In the first cycle, a visible necking occurs in the lower part of the horizontal part.

Substantial flexural deformation of the lower part of the test specimen and the strength of the test specimen is reduced after the lower part of the horizontal member is broken in the first cycle of 28.88 mm of tensile displacement after 2 cycles of inelastic deformation after the necking.

All. Test body according to another embodiment

 In the first cycle of compression displacement 12.38mm, bending deformation occurred with the naked eye on the horizontal lower part.

 Tensile Displacement 16.50mm In the first cycle, a visible necking occurs on the lower part of the horizontal part.

Substantial flexural deformation of the lower part of the test specimen and the strength of the test specimen is reduced after the lower part of the horizontal member is broken in the first cycle of 20.63 mm of tensile displacement after 2 cycles of inelastic deformation after the necking.

1: vertical frame
2: horizontal frame
3: seismic damper
31: connecting frame
32: moving frame
321: second fixing hole
33: plastic plate
331: incision groove 332: buffer hole
333: plastic rib 334: first fixing hole
335: fixing pin 336: buffer groove
337: first coupling hole
34: fixed frame
341: third fixing hole
35: bending prevention bracket
351: second coupling hole 352: recessed groove
353 vertical part 354 horizontal part
4: building

Claims (4)

Two vertical frames (1) and horizontal frames (2), which are installed at the periphery of a section forming a square frame for connecting the ends of the steel frame or reinforced concrete structure, are formed by the frame. A seismic damper (3) for interconnecting the inner side of the rectangular frame to absorb and cancel the vibration generated by the earthquake;
The seismic damper (3) has one end fixed to each of the two upper edges where the vertical frame (1) and the horizontal frame (2) meet, and the other end is two connecting frames (31) extending inclined in a direction facing each other. and;
A moving frame 32 which is formed in the form of a horizontally extending bar and is slightly spaced apart from the bottom surface and in which the lower ends of the two connecting frames 31 are fixed;
One or more buffer holes are formed in a rectangular plate shape vertically inserted into the lower portion is divided into two by the incision groove 331 vertically cut down from the center, the upper portion has a same width as the incision groove 331 332 is formed, and at least one plastic rib 333 is formed between the adjacent buffer holes 332 and between the buffer holes 332 and the upper end of the upper end and the incision groove 331, respectively. First fixing holes 334 are formed at both lower sides of the lower portions, respectively, and second fixing holes 321 formed at both ends of the moving frame 32 and fixing frames protruding upward from the horizontal frame 2, respectively. Firing type seismic damper, characterized in that consisting of two plastic plate member (33) hinged by a fixing pin (335) to the third fixing hole (341) formed on the top of the (34).
The method of claim 1, wherein the earthquake-resistant damper, characterized in that the buffer groove 336 having the same length as the buffer hole (332) is further formed in the center of the upper surface of the firing plate material (33).
[3] The method according to claim 1 or 2, further comprising: first coupling holes (337) formed at four upper sides of the fired plate member (33) arranged in a square lattice shape;
Both sides have a vertical portion in which a second coupling hole 351 corresponding to the first coupling hole 337 and a recessed groove 352 are formed at the center of the top and bottom of the buffer groove 336 at least not less than the length of the buffer groove 336. Two anti-bending brackets (35) consisting of a flat portion (353) and a plate-shaped horizontal portion (354) fixed in the horizontal direction in the outer center of the vertical portion (353) the first and second coupling holes (337, 351) Plastic seismic damper, characterized in that additionally fixed by a pin or bolt passing through).
According to claim 1 or 2, wherein the fixed frame 34 and the moving frame 32 is composed of a pair arranged in parallel in the front and rear direction, one end of the plastic plate 33 and the connecting frame 31 is Firing seismic damper, characterized in that coupled after being sandwiched between.

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