KR101198270B1 - Sliding Pendulum Isolator - Google Patents

Abstract

The present invention is bound to the upper side of the piers, the lower plate and the spherical seating groove is formed in the central region, one side is formed in a shape corresponding to the spherical seating groove, the other side is formed with a spherical radius of curvature, Is formed on the upper side of the spherical shape, one side is formed with a slide groove having a radius of curvature corresponding to the radius of curvature of the other side of the spherical surface, the other side is in contact with the lower side of the continuous upper plate of the bridge, the spherical seating groove and the spherical It is inserted and disposed between the lower side and between the slide groove of the upper plate and the upper side of the spherical part, and is composed of a friction plate formed corresponding to the shape of the spherical face, and accommodates the movement displacement and rotational displacement by the upper plate by the spherical surface. And, the radius of curvature of the slide groove is formed to be 1000mm to 5000mm, so that the pendulum motion by the seismic force is spherical and upper Disclosed is an earthquake isolation device that is guided in a slide groove of a plate. According to the present invention, the load of the continuous upper plate of the bridge is usually supported, and the displacement of the superstructure in the axial direction and the axial direction, and the deflection (tilting) of the superstructure in the axial direction due to temperature changes and other external factors. It can smoothly and accommodate the rotational displacement caused by the earthquake, and when the large displacement occurs due to the earthquake, it can uniformly dissipate the generated seismic energy, thereby ensuring the structural stability of the bridge. By being able to restore it, it is possible to minimize the damage of the bridge structure caused by the earthquake.

Description

Earthquake Isolator {Sliding Pendulum Isolator}

The present invention relates to an earthquake isolation device (bridge device) installed between the bridge deck and bridges and shifts, and more particularly, the load generated from the bridge superstructure to the undercarriage, the movement displacement of the continuous deck and The present invention relates to a seismic isolator capable of smoothly guiding rotational displacement, and dissipating seismic energy generated when a large displacement occurs due to an earthquake, thereby improving structural stability of the bridge.

As is well known, the sliding pendulum isolator is a structure installed on the bridge in preparation for the overload caused by the earthquake and the large displacement, and the following conditions must be basically satisfied.

That is, the bridge structure repeats elongation and contraction by elongation and contraction, creep, dry contraction and water pressure due to sagging of the continuous deck of the bridge, seismic force, wind power, external impact or temperature change according to season and weather. . In addition, the upper plate of the seismic isolator is moved by the continuous top plate of the bridge sliding in accordance with the repeated elongation and contraction of the bridge structure, resulting in an upward height step. Here, if the height difference of the continuous top plate or the upper plate of the bridge is more than 10mm, additional stress that may not be considered in the design of the upper structure of the bridge may occur, so it is necessary to design the seismic isolation base in consideration of this.

Therefore, by defining the range of the curvature of the curved surface of the friction surface of the upper plate of the seismic isolation device, there is a need to ensure the stability of the structure so that the upward step of the upper structure of the bridge does not occur more than 10mm even if the maximum displacement always occurs. In addition, there is a need to make the cycle structure of the bridge structure long, and to dissipate the seismic energy to improve the stability of the bridge structure, and after the large displacement caused by the earthquake, the upper structure of the bridge, that is, the continuous top plate of the bridge or seismic isolation Since the top plate of the device must be restored or returned to the state prior to the earthquake, it is necessary to define the curvature of the friction surface of the top plate of the seismic isolation device relative to the length of the continuous top plate of the bridge, ie the total length of the bridge continuous bridge. This is raised.

On the other hand, the conventional invention for the seismic as described above is disclosed the invention of the synthetic friction pendulum-type seismic device of Korea Patent No. 10-917093, which is shown in Figure 4, the base and the base of various structures In the seismic device is installed between the surface (500b) to mitigate the dynamic behavior of the structure in the event of an earthquake, it is fixed to the base plate (500b) and the bottom plate 502 is fixed to the bottom of the structure by the anchor bolt 501 Between the base plate 503 is a seismic motion damping unit 504 is built, the seismic motion damping unit 504 is an upper concave plate connected integrally with the bottom plate 502, and a convex spherical bearing in contact with the concave groove of the upper concave plate 506 and a guide bearing seat 507 fixed to the base plate 503 on which the convex spherical bearing 506 is seated, and having a cylindrical shear key 508 and a lower inner side of the shear key 508 around the upper concave plate. Annular buoyancy Anti-friction pendulum type, characterized in that the prevention device 509 is mounted, a plurality of friction material is arranged concentrically in the contact with the upper concave plate, the rubber pad is fitted around the guide bearing sheet 507 It is made of seismic device.

The conventional invention described above isolates the structure from the earthquake movement during the earthquake and stably supports the load of the structure, thereby reducing the width of the earthquake movement to perform the function of repositioning the structure after the earthquake, as well as the basics of power transmission facilities, power plants, bridges and buildings. Synthetic friction pendulum-type seismic device that can reduce manufacturing cost while commercially applying to various structures such as and storage tank structure, but it does not function at all for various displacement of three-dimensional structure, so it is suitable for movement displacement and rotation displacement during large displacement. There is a problem that cannot be accommodated.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and in general, for the axial direction and the right angle direction of the bridge and the ground surface due to the load of the continuous upper plate of the bridge, wind power, hydraulic pressure, external collision or other external factors. Moving displacement in the vertical direction and rotational displacement caused by the deflection of the bridge deck can be smoothly accommodated, and in the event of a large displacement caused by the earthquake, the seismic energy generated by it is uniformly dissipated, thereby ensuring structural stability of the bridge. It is an object of the present invention to provide an earthquake isolation device capable of quickly restoring a bridge structure to a point before large displacement occurs.

In order to achieve the above object, according to a preferred embodiment of the present invention, it is provided between the adjacent continuous top plate of the bridge, disposed between the continuous top plate and the bridge of the bridge, the rotational displacement and movement of the continuous top plate of the bridge In the seismic isolation device that accommodates displacement, the lower plate is bound to the upper side of the piers, the spherical (bearing) seating groove is formed in the central region, and one side is formed in a shape corresponding to the spherical seating groove, The side is formed with a spherical surface having a predetermined radius of curvature, and formed on the upper side of the spherical surface, one side is formed with a slide groove having a radius of curvature corresponding to the radius of curvature of the other side of the spherical surface, the other side of the continuous top plate of the bridge An upper plate in close contact with the lower side, between the spherical seating groove and the lower side of the spherical face, and the slide groove of the upper plate It is inserted between the upper surface of the spherical body, respectively, and is composed of a friction plate formed corresponding to the shape of the spherical body: receiving the displacement displacement and rotational displacement by the upper plate by the spherical surface, the curvature of the slide groove The radius is formed to be 1000mm to 5000mm, to provide an earthquake isolation device for the pendulum motion by the seismic force is guided in the slide groove of the spherical and the upper plate.

In the seismic isolation device according to the present invention, if the length of the continuous top plate of the bridge is 220m or less, the radius of curvature of the slide groove of the upper plate is 1000mm to 5000mm, if the length of the continuous top plate of the bridge is more than 220m 480m or less The radius of curvature of the slide groove of the upper plate is 2000mm to 5000mm, and if the length of the continuous upper plate of the bridge is more than 480m and less than 630m, the radius of curvature of the slide groove of the upper plate is 2500mm to 5000mm and the continuous upper plate of the bridge When the length of is greater than 630m or less than 760m, the radius of curvature of the slide groove of the upper plate is 3000mm to 5000mm, If the length of the continuous top plate of the bridge is more than 760m and less than 880m, the radius of curvature of the slide groove of the upper plate is 3500mm to If the length of the continuous top plate of the bridge is more than 880m, the slide of the upper plate is 5000mm The radius of curvature may be in the range 4000mm to 5000mm.

In the seismic isolation device according to the present invention, the guide portion is formed on two opposite sides or four opposite sides of the lower plate, respectively, wherein the guide portion extends in a horizontal direction with respect to the ground surface from the side of the lower plate A horizontal plate, a vertical plate vertically formed to be adjacent to the side surface of the upper plate from an end of the horizontal plate, and a breaking bolt for fixing the vertical plate to the horizontal plate. A displacement is caused by a horizontal force in the axial direction or the perpendicular direction of the axial direction, and a notch is formed in the rupture bolt so as to face an interface between the lower plate and the upper plate so as to be larger than a predetermined size between the lower plate and the upper plate. When displacement by horizontal force occurs Group breaking bolts may be shear failure by the notch.

In the seismic isolation device according to the present invention, the friction plate resists acupressure stress of 150 MPa at 60 ° C., the friction coefficient is within 10% at maximum, and the friction plate has excellent durability and good resistance to high temperature. .

According to the present invention, the movement displacement in the direction of the bridge and the direction perpendicular to the axis of the bridge and the deflection of the plate structure in normal times due to load, seismic force, wind power, water pressure, external collision or other external factors of the continuous top plate of the bridge It can smoothly and accommodate the rotational displacement caused by the earthquake, and when the large displacement occurs due to the earthquake, it can uniformly dissipate the generated seismic energy, thereby ensuring the structural stability of the bridge. By being able to restore it, it is possible to minimize the damage of the bridge structure caused by the earthquake.

1A is a schematic perspective view of an earthquake isolation device according to a first preferred embodiment of the present invention, and FIG. 1B is a side view of the earthquake isolation device of FIG. 1A.
Figures 2a to 2c show a perspective view, a cross-sectional view and a bottom view of an example in which guides are additionally formed on two opposite sides of the lower plate of the seismic isolation device of Figure 1a, respectively.
3A to 3C show a perspective view, a cutaway cross-sectional view, and a bottom view of an example in which guides are additionally formed on four opposite sides of the lower plate of the seismic isolation device of FIG. 1A, respectively.
4 is a partial cutaway sectional view of the prior art.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object will be described in detail.

As is well known, the seismic isolator is provided below between adjacent continuous tops of the bridge and is disposed between the contact and the bridge of the continuous tops of the bridges to substantially accommodate the rotational and moving displacements of the continuous tops of the bridges. Play a role.

1A is a schematic perspective view of an earthquake isolation device according to a first preferred embodiment of the present invention, and FIG. 1B is a side view of the earthquake isolation device of FIG. 1A.

1A and 1B, the seismic isolation device 100 according to the present invention includes a lower plate 110, a spherical shape 120, and a continuous upper plate (not shown) for binding to a pier (not shown). ) And an upper slate 130 having a predetermined radius of curvature in close contact with the shape of the spherical shape 120.

First, the lower plate 110 is bound to the upper side of the piers, spherical seating groove (not shown) of a predetermined radius of curvature is formed in the central region. For example, the lower plate 110 is pier by a cylindrical socket 112-1 having a hollow embedded in the upper portion of the pier, and an anchor bolt 112-2 inserted into the socket 112-1. It is firmly fixed to the upper side and fixedly formed, and the lower plate 110 can be easily taken out and separated from the upper part of the pier by releasing the anchor bolt 112-2 from the socket 112-1. Here, the socket 112-1 and the anchor bolt 112-2 may be formed in a plurality of side or edge regions of the lower plate 110. On the other hand, since the diameter of the socket 12-1 is relatively larger than the diameter of the anchor bolt 112-2, the lower plate 110 is anchor bolt 112-2 above the pier by the socket 112-1. It can be fixed and bound by a relatively larger bonding force. In addition, the spherical seating groove may be recessed inwardly with a predetermined radius of curvature so as to smoothly receive the rotational displacement transmitted through the upper plate 130 and the spherical surface 120 from the continuous top plate of the bridge by external force. .

Next, one side of the spherical shape 120 is formed in a shape corresponding to the spherical seating groove, the other side of the spherical shape 120 is formed to have a predetermined radius of curvature. That is, one side of the spherical surface 120 is formed in a shape corresponding to the spherical seating groove, the other side of the spherical surface 120 is formed in a shape in close contact with the lower side of the upper plate 130 to be described later, the continuous bridge The other side of the spherical surface 120 receives the rotational displacement transmitted from the upper plate and one side of the spherical surface 120 is guided by the spherical seating groove to smoothly receive the rotational displacement in the axial direction. Here, the bridge direction refers to the direction in which a plurality of bridges of the bridge is arranged or the longitudinal direction of the continuous top plate of the bridge, the perpendicular direction of the bridge refers to the direction orthogonal to the horizontal direction perpendicular to the bridge axis, and the continuous top plate and It refers to a continuous top of a continuous bridge disposed between other seismic isolation devices that are spaced apart from it.

Next, the upper plate 130 serves to support the continuous top plate of the bridge, is formed in close contact with the upper side of the spherical shape 120, the one side corresponding to the radius of curvature of the other side of the spherical shape 120 A slide groove 131 having a radius of curvature is formed, and the other side is fixed to the lower side of the continuous upper plate of the bridge.

According to the configuration as described above, the movement displacement and rotational displacement by the upper plate 130 by the spherical surface 120 and the spherical seating groove can be accommodated within a predetermined range.

In addition, the slide groove 131 of the upper plate 130 corresponding to the other side of the spherical 120 is formed to have a predetermined radius of curvature, that is, the radius of curvature in the range of 1000mm to 5000mm, so that the deflection, temperature of the continuous top plate of the bridge To effectively accommodate elongation and contraction, creep, dry shrinkage or intermittent rotational displacement and displacement due to change, in particular, the pendulum motion due to seismic force is the slide groove 131 of the spherical surface 120 and the upper plate 131. To be derived from. Here, the pendulum motion by the seismic force refers to a close relative motion between the spherical surface 120 and the slide groove 131 of the upper plate 130 by the seismic force.

Therefore, according to the configuration as described above, the displacement of the bridge in the direction perpendicular to the direction and the perpendicular to the axial direction and the ground surface, and the axial axis in the normal continuous load of the bridge, wind, hydraulic pressure, external impact or other external factors Rotational displacement due to deflection (tilting) in the direction can be smoothly accommodated, and when a large displacement occurs due to an earthquake, the seismic energy generated by this can be dissipated uniformly to ensure structural stability of the bridge. The bridge structure can be quickly restored to the point before it occurred.

For example, when the displacement of the continuous top plate of the bridge by the external force, the upper plate 130 is pendulum movement by the radius of curvature of the slide groove 131 on the upper side of the spherical surface 120, so that the upper plate 130 Displacement occurs in a direction perpendicular to the earth's surface. Here, the radius of curvature of 1000mm to 5000mm of the slide groove 131 of the upper plate 130, the continuous top plate of the upper plate 130 or the bridge can maintain a certain height step, for example, a height step of less than 10mm in this embodiment It is set to be.

On the other hand, if a height step of 10mm or more points settled on the continuous top plate of the bridge, additional stress not considered in the design of the bridge is generated in the structure constituting the bridge, so that the structural stability of the bridge is not secured. As described above, it is necessary to set the range of the radius of curvature of the slide groove 131 of the upper plate 130 within the range of 1000 mm to 5000 mm according to the length of the continuous top plate of the bridge so as to ensure the structural stability of the bridge even in normal or large displacement. There is. In addition, as shown in Table 1, the radius of curvature of the slide groove 131 is the point before the large displacement occurs, so that the continuous top plate of the bridge or the top plate 130 of the continuous top plate of the bridge so that it can be restored or returned by its own load. It may need to be set within 1000 mm to 5000 mm depending on the length.

Length of continuous deck of bridge (L, unit is m) Radius of curvature of the slide groove (R in mm) L ≤ 220 1000 ≤ R ≤ 5000 220 <L ≤ 480 2000 ≤ R ≤ 5000 480 <L ≤ 630 2500 ≤ R ≤ 5000 630 <L ≤ 760 3000 ≤ R ≤ 5000 760 <L ≤ 880 3500 ≤ R ≤ 5000  L〉 880 4000 ≤ R ≤ 5000

Specifically, as shown in Table 1, if the length of the continuous top plate of the bridge is 220 m or less, the range of the radius of curvature of the slide groove 131 of the upper plate 130 is 1000mm to 5000mm, the length of the continuous top plate of the bridge If the length is more than 220m and less than 480m, the radius of curvature of the slide groove 131 of the upper plate 130 is 2000mm to 5000mm, if the length of the continuous top plate of the bridge is more than 480m and less than 630m, the slide groove of the upper plate 130 ( 131 has a radius of curvature of 2500mm to 5000mm, the length of the continuous top plate of the bridge is more than 630m 760m or less, the radius of curvature of the slide groove 131 of the upper plate 130 is 3000mm to 5000mm, the length of the continuous top plate of the bridge Is greater than 760 m and less than or equal to 880 m, the radius of curvature of the slide groove 131 of the upper plate 130 is 3500mm to 5000mm, and if the length of the continuous top plate of the bridge is greater than 880m, the slide groove 131 of the upper plate 130 Song The rate radius is preferably 4000 mm to 5000 mm.

Here, the upper limit of the radius of curvature of the slide groove 131 of the upper plate 130 is a limit value having a restoring force so that the continuous upper plate or the upper plate 130 of the bridge can be restored or returned to the point before the displacement, the continuous of the bridge It is preferable that it is 5000 mm regardless of the length of the top plate. In addition, the lower limit of the radius of curvature of the slide groove 131 of the upper plate 130 defines the thickness of the upper plate 130 that can accommodate the load transmitted from the continuous upper plate of the bridge, the length of the continuous upper plate of the bridge It is preferable that the longer the radius of curvature of the slide groove 131 is increased at a constant ratio.

Figures 2a to 2c show a perspective view, a cross-sectional view and a bottom view of an example in which guides are additionally formed on two opposite sides of the lower plate of the seismic isolation device of Figure 1a, respectively. 3A to 3C show a perspective view, a cutaway cross-sectional view, and a bottom view of an example in which guide parts are additionally formed on four opposite sides of the lower plate of the seismic isolation device of FIG. 1A, respectively. Here, (a) of FIG. 2B is a cross-sectional view of the seismic isolation device in the throttle direction, (b) is a cutaway cross-sectional view of the seismic isolation device in the orthogonal direction, and FIG. 3A (a) shows the seismic isolation device from above. It is a perspective view and (b) is a perspective view which looked at the seismic isolation apparatus from the lower side.

2A to 3C, the above-described seismic isolation device 100 may further include guide parts 140 formed on two opposing sides or four opposing sides of the lower plate 110, respectively. As will be described later, FIGS. 2A to 2C illustrate an example further including guide parts 140 formed on two opposite sides of the lower plate 110, and FIGS. 3A to 3C illustrate the lower plate 110. It shows an example further comprising a guide portion 140 formed on each of the four opposite sides of the.

Specifically, the guide part 140 extends from the side of the lower plate 110 to the horizontal plate 141 extending in the horizontal direction with respect to the ground surface, and from the end of the horizontal plate 141 to the side of the upper plate 130. The vertical plate 142 vertically formed to be adjacent to each other, and the breaking bolt 143 for fixing the vertical plate 142 to the horizontal plate 142, the guide portion 140 is the axial direction of the upper plate 130 Alternatively, the displacement displacement due to the horizontal force in the perpendicular direction of the axial axis is received and the notch (not shown) is formed on the break bolt 143 opposite the boundary between the lower plate 110 and the upper plate 130. When a displacement caused by a horizontal force or more, for example, between 1.1 and 1.2 times the maximum design horizontal force that may occur between the lower plate 110 and the upper plate 130 occurs, the breaking bolt 143 is sheared by the notch. Can be destroyed have. That is, in normal times, the guide part 140 can resist the horizontal force in the axial direction or the perpendicular direction of the axial direction, and when the large displacement caused by the earthquake force, the lower plate by the notch when the load of 1.1 times to 1.2 times the maximum design horizontal force is generated. Shear failure at the interface between the 110 and the upper plate 130 makes it possible to effectively prevent deformation and breakage of other bridge structures, and then, after the slide groove 131, the bridge structure is quickly moved to the point before the large displacement occurs. Can be restored.

On the other hand, the seismic isolation device 100 having the guide portion 140 formed on two opposing side surfaces of the lower plate 110 smoothly accommodates the displacement in the axial direction of the upper plate 130, and the upper plate 130. ) Can effectively resist the horizontal force in the perpendicular direction of the bridge to ensure structural stability of the bridge. In addition, the seismic isolation device 100 having the guide portions 140 formed on four opposite sides of the lower plate 110 can effectively resist the horizontal force in the axial direction and the perpendicular direction of the upper plate 130. As a result, the structural stability of the bridge can be ensured.

In addition, between the spherical seating groove 111 and the lower surface of the spherical surface 120, and between the slide groove 131 of the upper plate 130 and the upper surface of the spherical surface 120, The friction plate 150 is formed to correspond to the shape, excellent in durability, good resistance to high temperature, and has a friction force of a predetermined size or less. On the other hand, the friction plate 150 can properly accommodate the expansion and expansion due to the constant temperature changes of the general road bridge, and the vibration displacement due to the vehicle load generated in the high-speed railway and the general railway, the friction plate 150 is about 60 It is preferable that the frictional coefficient of the friction plate be about 10% or less, against the pressure stress of 150 MPa at &lt; RTI ID = 0.0 &gt;

When the seismic isolation device of the present invention is installed in the bridge below, the radius of curvature of the required slide groove according to the specification of the bridge deck is calculated as follows.

The graph is a "force-displacement curve of a bridge bearing" for seismic isolation showing the displacement amount of the X axis with respect to the Y axis force, the spherical surface {120; When the elastic member 320 is also in the initial position between the same method and the slide grooves (131, 341), the situation is at the origin of the coordinates, and stops when one crossover or seasonal temperature difference and external force (normal external force or earthquake force) are applied. Until the friction force is exceeded, only the force rises along the Y axis (blue thick line), and when a force above Fy = μW is applied, the spherical particles 120 and 320 slide along the slide grooves 131 and 341, which are related to the dynamic friction coefficient. This is proportionally changed along the line inclined to the upper right side (where Fy is the force in the Y-axis direction, μ is the static friction coefficient, and W is the vertical drag).

At this time, if the maximum displacement (design displacement; the amount of movement in the earthquake) is Δ, the force required until this time is Fu = H = Fy + K2 × Δ = μ × W + W / R × Δ (Equation 1).

Keff (red line) = H / Δ = (μW + W / R × Δ) / Δ = μW / Δ + W / R (Equation 2).

Calculating resilience;

Fr (1.0Δ)> Fr (0.5Δ) + W / 80 (Equation 3) and {ref; Published by American Association of State Highway Transportation Officals (AASHTO) Guide Spec. 12.2 "Lateral Restoring Force"},

Fr (1.0Δ) = K2 × Δ = W / R × Δ {See Equation 1} (Equation 4),

Fr (0.5Δ) = K2 × (0.5Δ) = W / R × 0.5Δ (Equation 5) {See Equation 1}

Substituting these Equations 4 and 5 into Equation 3, the AASHTO standard,

 W / R × Δ> W / R × 0.5Δ + W / 80,

 0.5? W? Δ / R> W / 80, which is R <40? Δ (Expression 6).

Calculating the lift amount (lift) of the upper plate to the movement of the bearing;

Within 10 mm of design allowance (see Ministry of Land, Transport and Maritime Affairs, "Moments on Intersection 4.10.1 of Continuous Girder Bridge, 4.10",

In the upper plate (130, 340) formed with the slide groove (131, 341),

10> R-A (Equation 7)

Here, R is the radius of curvature, A is the height of the position where the spherical surface (120, 320) is moved, Δ1 is the movement distance (always movement distance) at this time, the unit is mm,

A = √ (R ² -Δ1 ² ) (Equation 8),

Solving this by substituting Equation 8 into Equation 7, R> 0.05Δ1 ² + 5 (Equation 9)

In addition, Δ1, which is a constant moving distance, is ± 0.25L + 0.1L + 0.2L (L is the extension length of the bridge),

Considering the margin 30 mm (± 15 mm),

Δ1max = 0.55L + 15 (Expression 10),

Δ1min = 0.05L + 15.

Substituting Equation 10 into Equation 9,

Rmax> 0.00378125? L1 ² + 0.4125? L1 + 16.25 (Equation 11), where L1 is the length of the top plate,

From equations 6 and 11;

40? Δ>R> 0.00378125? L1 ² + 0.4125? L1 + 16.25 (Equation 12)

Substituting the top plate length from Equation 12 is shown in Table 2 below.

Length of continuous deck of bridge (L1, unit is m) Radius of curvature of the slide groove (R in mm) L ≤ 220 290.01 ≤ R ≤ 6000 220 <L ≤ 480 1085.45 ≤ R ≤ 6000 480 <L ≤ 630 1776.90 ≤ R ≤ 6000 630 <L ≤ 760 2513.80 ≤ R ≤ 6000 760 <L ≤ 880 3307.45 ≤ R ≤ 6000 950> L> 880 3820.70 ≤ R ≤ 6000

From Table 2, which is the radius of curvature of the required slide groove according to the specification of the bridge deck, the range of Table 1, which is a technical component of the present invention, is included, rather, it is within a superior specification range.

The above terms are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and the definitions should be made based on the contents throughout the specification. In addition, in describing the preferred embodiments of the present invention with reference to the accompanying drawings has been described with respect to the seismic isolation device having a specific shape and structure, the present invention can be variously modified and changed by those skilled in the art, such variations and modifications Should be construed as falling within the protection scope of the present invention.

100: seismic isolation device 110: lower plate
111: spherical seating groove 112-1: socket
112-2: anchor bolt 120: spherical
130: upper plate 131: slide groove
140: guide portion 141: horizontal plate
142: vertical plate 143: broken bolt
150: friction plate
501: anchor bolt 502: bottom plate
503: base plate 504: earthquake motion damping unit
506: convex spherical bearing 507: guide bearing seat
508: Shear Key 509: Uplift restrainer
500b; Foundation

Claims (4)

An earthquake installed between adjacent continuous tops of the bridge and disposed between the continuous tops of the bridges and the pier to smoothly transfer the load of the bridge superstructure to the bottom and to accommodate rotational and moving displacements of the continuous tops of the bridges In the isolation device,
A lower plate which is fastened to an upper side of the pier and has a spherical seating groove formed in a central region thereof;
One side is formed in a shape corresponding to the spherical seating groove, the other side is formed with a spherical radius of curvature,
Is formed on the upper side of the spherical surface, one side is formed with a slide groove having a radius of curvature corresponding to the radius of curvature of the other side of the spherical surface, the other side is in close contact with the lower side of the continuous upper plate of the bridge,
A friction plate disposed between the spherical seating groove and the lower surface of the spherical body and between the slide groove of the upper plate and the upper surface of the spherical body, the friction plate being formed corresponding to the shape of the spherical surface;
To accommodate movement displacement and rotation displacement by the upper plate by the spherical face,
The radius of curvature of the slide groove is formed to be 1000mm to 5000mm, so that the pendulum motion by the seismic force is induced in the slide groove of the spherical and the upper plate
Earthquake isolation device.
The method according to claim 1,
If the length of the continuous top plate of the bridge is less than 220m, the radius of curvature of the slide groove of the upper plate is 1000mm to 5000mm,
If the length of the continuous top plate of the bridge is more than 220m 480m or less, the range of the radius of curvature of the slide groove of the upper plate is 2000mm to 5000mm,
If the length of the continuous top plate of the bridge is more than 480m and 630m or less, the range of the radius of curvature of the slide groove of the upper plate is 2500mm to 5000mm,
When the length of the continuous top plate of the bridge is more than 630m or less than 760m, the range of the radius of curvature of the slide groove of the upper plate is 3000mm to 5000mm,
If the length of the continuous top plate of the bridge is more than 760m or less than 880m, the radius of curvature of the slide groove of the upper plate is 3500mm to 5000mm,
If the length of the continuous top plate of the bridge is more than 880m, the range of the radius of curvature of the slide groove of the upper plate is seismic isolation device, characterized in that 4000mm to 5000mm.
The method according to claim 2,
Further comprising guide parts respectively formed on two opposite sides or four opposite sides of the lower plate,
The guide portion may include a horizontal plate extending from a side surface of the lower plate in a horizontal direction with respect to the ground surface, a vertical plate formed vertically adjacent to a side surface of the upper plate from an end portion of the horizontal plate, and the vertical plate. It consists of breaking bolts fixed to the plate,
The guide portion accommodates the displacement by the horizontal force in the axial direction or the axial direction of the upper plate,
A notch is formed in the break bolt so as to face an interface between the bottom plate and the top plate, and when the displacement occurs due to a horizontal force of a predetermined size or more between the bottom plate and the top plate, the break bolt is sheared by the notch. Earthquake isolation device, characterized in that.
The seismic isolation device according to claim 1, wherein the friction plate resists acupressure stress of 150 MPa at 60 ° C., and the friction coefficient is within a maximum of 10%.

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