KR102275075B1 - Multilayered elastic isolation device for supporting bridge structure - Google Patents

Abstract

The present invention relates to a configuration of a multilayered elastic seismic isolator for supporting a bridge structure. A seismic isolator is installed between structures such as a normal bridge to transmit load and accept displacement caused by external and internal factors at normal times, and to reduce a transmitted seismic force by making use of its isolation capability when an earthquake occurs, thereby securing durability and increasing a lifespan of the structures. The seismic isolator according to the present invention specifically comprises a multilayered elastic structure, at least one through-hole formed in the multilayered elastic structure, an energy absorber disposed in the through-hole, and caps disposed on upper and lower portions of the energy absorber to constrain the energy absorber, wherein the multilayered elastic structure includes: an elastic material and a steel material positioned between upper and lower structures and alternately stacked; and an upper end plate and a lower end plate formed at ends of upper and lower portions of a lamination of the elastic material and the steel material.

Description

Multilayered elastic isolation device for supporting bridge structure

The present invention relates to a laminated elastic isolator for supporting a structure of a bridge.

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Patent Invention 001 relates to a rubber seismic bearing or rubber bearing manufactured integrally with the upper and lower plates, and more particularly, between the upper plate on which the bridge upper plate is installed, and the lower plate installed on the pier, between the upper and lower plates. In a lead seismic bearing (LRB) comprising a laminated rubber and a reinforcing steel plate, and a lead rod and a lead restraining tab inserted through the rubber and the reinforcing steel plate, the upper and lower plates and the rubber are directly bonded by an adhesive, Vertical grooves and horizontal grooves are provided at the ends of the bonding surfaces of the upper and lower plates to enhance bonding strength and secure an aging margin, characterized in that the curved portion of the iron plate and the curved portion of the rubber are provided, rubber and iron It not only improves the adhesive strength by increasing the bonding area between the plates, but also converts the tensile stress generated at the end of the bonding surface into shear stress during shear deformation of the solder seismic bearing to improve the bonding strength, and furthermore, the inclined surface at the end of the horizontal groove to reduce the stress acting on the end of the bonding part so that the bonding surface does not peel off. By placing a curved part, the stress concentration that occurs on the bonding surface with the rubber during shear deformation of the rubber seismic bearing is relieved. It is an invention that has the effect of smoothly performing the function as an earthquake isolation device even when excessive displacement occurs due to earthquakes as well as regular displacement by improving the tearing caused by stress concentration generated in rubber during excessive deformation of rubber.
Patent Invention 002 relates to a lead seismic isolation bearing installed between an upper plate installed on a bridge and a lower plate installed on a pier, and is in close contact with each other between the upper plate and the lower plate, on the outer circumferential surface of the central central hole an upper and lower end plate in which a coupling groove is formed to open outwardly, and a locking protrusion is formed on the circumferential surface of the outer edge end; spacers respectively positioned in the coupling grooves and coupled to the upper and lower end plates; Lead rods each having upper and lower ends passing through the center hole of the upper and lower end plates and installed between the spaces; a rubber bearing coupled between the upper and lower end plates so as to surround the lead rod, the upper and lower ends of the outer rim surround the upper and lower end plates in close contact with the upper and lower plates, and are fitted and engaged with the engaging jaws; It is an invention including a plurality of reinforcing plates positioned at equal intervals up and down in the interior of the rubber support and supporting the lead rod.
Patent Invention 003 is a lead rubber bearing (LRB) for bridges installed between bridges and piers as lead rubber bearings for bridges that can control stability. and an upper plate; lower and upper end plates installed between the lower and upper plates; a rubber bearing installed in the center between the lower and upper end plates; a lead core press-fitted into the center hole to be formed in the rubber support; a reinforcing plate laminated on the inside of the rubber support to prevent vertical deflection of the rubber support, increase vertical rigidity, and prevent deformation of the lead core when horizontal displacement occurs; a lead fixing plate formed so that lead is not pushed out after the lead core is press-fitted; a plate fixing bolt for coupling and fixing the lower and upper plates to the lower and upper end plates, respectively; and a spring for adjusting stability which is inserted into the rubber support to surround the outer circumferential surface of the lead core to adjust the stability of the lead seismic isolator support.
Patent Invention 004 relates to a seismic isolator, comprising: an upper flange plate connected to an upper structure; a lower flange plate connected to the lower structure; It is installed between the upper flange plate and the lower flange plate and includes a laminated rubber body having rubber elastic material layers and rigid material layers alternately laminated in a vertical direction, at least one of the rigid material layers disposed close to the upper flange plate at least one of the upper rigid material layer and the at least one lower rigid material layer disposed proximate to the lower flange plate is elongated in the horizontal direction with respect to the adjacent intermediate rigid material layer adjacent to the one of the plurality of intermediate rigid material layers. Including what is formed to be possible.

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US 10-0401234 B1 (registration date September 29, 2003) US 10-1051439 B1 (registration date) July 18, 2011) US 10-2013-0043855 A (Public Date May 02, 2013) KR 10-1693654B1 (Registration Date January 02, 2017)

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The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure, and specifically, an elastic material 110 positioned between an upper structure and a lower structure, and alternately laminated; and an iron material 120; and an upper end plate 131 formed at upper and lower ends of the elastic material and the iron material 120 stacked portion; and a lower end plate 132; In the laminated elastic structure (100) comprising a; at least one through hole (140) formed in the laminated elastic structure (100); And, an energy absorber 150 disposed in the through hole (140); is included, and the upper and lower portions of the energy absorber 150 include a cap 160 for constraining the energy absorber 150; a cap 160 provided at the upper and lower portions of the energy absorber 150 is located; Silver constrains the energy absorber 150 and is provided to discharge heat generated according to the behavior at all times and during earthquakes, and the cap 160 has higher thermal conductivity than the iron material 120 and the energy absorber 150 in the same temperature environment. The purpose is to improve the behavioral performance of the seismic isolator at all times and during earthquakes with a configuration including a high material.

The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure, and specifically, an elastic material 110 positioned between an upper structure and a lower structure, and alternately stacked; and an iron material 120; and an upper end plate 131 formed at upper and lower ends of the elastic material and the iron material 120 stacked portion; and a lower end plate 132; In the laminated elastic structure (100) comprising: one or more through-holes (140) formed in the laminated elastic structure (100); and an energy absorber (150) disposed in the through-holes (140); is included, and the upper and lower portions of the energy absorber 150 include a cap 160 constraining the energy absorber 150; a cap 160 provided at the upper and lower portions of the energy absorber 150; is provided to constrain the energy absorber 150, and to discharge heat generated according to the behavior at all times and during earthquakes, and the cap 160 has higher thermal conductivity than the iron material 120 and the energy absorber 150 in the same temperature environment. The purpose is to improve the behavioral performance of the seismic isolator at all times and during earthquakes with a configuration including high material

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The structure of the laminated elastic seismic isolator for supporting the bridge structure of the present invention is located between the upper and lower parts of the bridge structure, and serves to accept displacement and transmit the load generated by external and internal factors at all times, and during earthquakes It plays a role in securing the durability of the structure and increasing the lifespan by reducing the transmitted seismic force by expressing the seismic isolator's own damping ability. The laminated elastic seismic isolator for supporting the bridge structure of the present invention includes a cap constraining the energy absorber on upper and lower portions of the energy absorber, and the caps provided on the upper and lower portions of the energy absorber serve to constrain the energy absorber as well as Rather, it performs the function of discharging the heat generated according to the behavior, discharging heat to the outside faster than the existing seismic isolator, and thus has the effect of quickly recovering the design stiffness value. With this fast stiffness recovery effect, energy dissipation performance according to repeated earthquake history can be secured, so damage to the structure can be minimized, and it is possible to secure the structural integrity and increase the lifespan of the structure at the design value level at regular times and during earthquakes.

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1 is a view showing that the seismic isolator of the present invention is constructed on a bridge;
2 is a cross-sectional view of the seismic isolator of the present invention.
3 is a conceptual diagram illustrating a heat transfer path of an energy absorber according to the behavior of the vibration isolator according to the present invention.
4 (a), (b) is another embodiment of the cap configuration applied to the seismic isolator of the present invention.
5 (a), (b) is another embodiment of the cap configuration applied to the seismic isolator of the present invention.
Figure 6 shows an example of constant monitoring using a measurement means

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to explain in detail enough that a person skilled in the art to which the present invention pertains can easily carry out the present invention.

The numbers cited in the examples below are not limited only to the objects of reference, and may be applied to all examples. Objects exhibiting the same purpose and effect as the configuration presented in the examples correspond to equivalent replacement objects. The higher-level concept presented in the examples includes sub-concept objects that are not described.

(Embodiment 1-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, the elastic material 110 is positioned between the upper and lower structures, and is alternately laminated; and an iron material 120; and an upper end plate 131 formed at upper and lower ends of the elastic material 110 and the iron material 120 stacked portion; and a lower end plate 132; in the laminated elastic structure 100 comprising: at least one through hole 140 formed in the laminated elastic structure 100; and disposed in the through hole 140 The energy absorber 150 is included, and the upper and lower portions of the energy absorber 150 include a cap 160 that restrains the energy absorber 150;

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The present invention relates to a seismic isolator positioned between structures to dissipate energy. It is formed by intersecting an elastic material (110) and an iron material (120) and stacking them, and the upper and lower ends of the stacking part are connected to the upper and lower structures. It is provided as a laminated elastic structure 100 that is further provided with upper and lower end plates 132 for doing so. This is a normal elastic bearing and can be generally regarded as a C-type elastic bearing according to KS F 4420. In addition, by further providing a through hole 140 penetrating the laminated elastic structure 100 and inserting an energy absorber 150 such as lead, it can be formed as a lead insertion seismic isolator.

In addition, the elastic material 110 in the present invention may be a material containing one or more of rubber, urethane, and silicone material, and the iron material 120 and the upper and lower end plates are provided with a material containing ordinary iron. , aluminum and other materials can also be applied.

(Example 1-2) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap provided on the upper and lower portions of the energy absorber 150 (160); is provided to constrain the energy absorber 150, and to discharge the heat generated according to the behavior at all times and earthquakes, and the cap 160 is the iron material 120 and the energy absorber 150 in the same temperature environment. ), including materials with higher thermal conductivity than

The energy absorber 150 is deformed due to constant and repeated behavior during earthquakes, and the temperature rises. When the seismic isolator behaves, the temperature rises due to the behavior of the instantaneous repetitive cycle, particularly during earthquakes, resulting in the yield strength (yield strength) based on normal room temperature. strength), and this reduces the energy dissipation capacity of the seismic isolator and also reduces the shear strength. By providing the cap 160 with high thermal conductivity at the upper and lower ends of the energy absorber 150, heat can be discharged to the outside faster than the conventional seismic isolator, and the original design rigidity can be restored.

In fact, the reduction in strength due to the repeated behavior of these seismic isolators is described in a paper (Kwang-Kyu Yang and Jong-Geol Song, Evaluation of Inelastic Response of Lead-Rubber Bearings (LRB) Considering the Temperature Rising Effect of Lead Cores, Proceedings of the Korean Society of Earthquake Engineers, September 2016, Volume 20 5) ) has been confirmed.

In the present invention, in order to dissipate the heat generated according to this repetitive behavior and restore the strength at room temperature, a heat conductor having high thermal conductivity is provided in the seismic isolator, thereby discharging heat to the outside faster than the existing seismic isolator, resulting in original design rigidity To provide a seismic isolator having characteristics that can be restored to

(Embodiment 1-3) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Embodiment 1-1, the elastic material 110 implements different hardness depending on the location. include what can be

The elastic material 110 may be made of a material capable of stretching such as general rubber or urethane, silicone, or the like. The elastic material 110 as a rubber material may be in the range of rubber hardness applied to the bridge bearing (Shore A 50 to 70), and the range of hardness applied depending on the location may be differently applied. For example, a laminated elastic structure ( 100), the rubber used as an elastic material may have a shore (Shore A) standard hardness of 70, and the outer coating rubber surrounding the laminated elastic structure 100 may have a higher or lower hardness than the laminated elastic structure 100. .

In addition, it may be considered to differentially apply hardness according to the lamination area, such as the lamination area on the upper side and the lower side of the laminated elastic structure 100 and the central side lamination area of the laminated elastic structure 100 . As such, when applying the elastic material 110 of other materials such as urethane and silicone, it may be considered to apply different hardness.

(Example 1-4) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, nano-scale reinforcing fibers are added to the elastic material to improve durability. This may include applying

It is common not to apply fiber reinforcement in consideration of the effects of tearing, etc., as tensile and shrinkage of elastic materials such as rubber are repeated in structures that behave like normal bridge bearings. In order to improve the durability of the material, it may be considered to reinforce materials such as nano or micro units of aramid, glass, and carbon in the form of short fibers.

(Example 2-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the energy absorber 150 is lead with a purity of 99.9% or more. include

The energy absorber 150 usually uses lead with a purity of 99.9% or more, which is broken by the behavior of the confined lead at all times or during an earthquake, and recrystallized at room temperature (about 0 to 20 degrees) to repeat the behavior. The same strength can be recovered and maintained even after the fracture history according to the

(Example 2-2) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the energy absorber 150 includes lead, tin, bismuth, and zinc. , may be a combination comprising at least one selected from among aluminum.

As such, metals that are recrystallized at room temperature (about 0 to 20 degrees) and recover the same yield strength even after fracture history due to repeated behavior include lead (Pb), tin (Sn), bismuth (Bi), zinc ( Zn), aluminum (Al), etc., and the recrystallization time is determined by purity and temperature.

(Example 2-3) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the energy absorber 150 is constantly measured for deformation due to external force. It may include the application of a monitoring system through the measurement means 300 for doing so.

In order to measure the strain of the energy absorber 150 applied to the through-hole 140 of the laminated elastic structure 100 , monitoring can be performed using a measuring means 300 such as a strain gauge that measures by a change in electrical resistance. For this purpose, the measuring means 300 such as a strain gauge may be positioned in direct contact with the absorber 150 .

(Embodiment 3-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Embodiment 1-1, the cap 160 includes aluminum.

The cap 160 may include aluminum, and aluminum is a steel material having a higher thermal conductivity than a steel material including iron as a metal material.

(Example 3-2) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 is made of aluminum, copper, gold, silver, It may be a combination including at least one selected from bronze, brass, nickel, platinum, and tungsten.

The cap 160 may include at least one selected from aluminum, copper, gold, silver, bronze, brass, nickel, platinum, and tungsten, and in particular, may be an alloy including aluminum-copper (Al-Cu).

The cap 160 may be made of a material having higher thermal conductivity than the iron material 120 and the energy absorber 150 in the same temperature environment.

(Example 4-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 is fixed to the upper and lower end plates. Means 230; may further include a fixed.

The cap 160 provided at the upper and lower ends of the energy absorber 150 is a fixing means 230 such as a bolt on the upper and lower end plates to prevent the energy absorber 150 in the laminated elastic structure 100 from being separated. can be fixed with

(Example 4-2) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 is disposed at the end of the energy absorber 150. It is located, and further includes being provided in a shape with a large surface area of the same cross-section.

In addition to the role of constraining the energy absorber 150 , the cap 160 also serves as a heat conductor for transferring heat generated from the energy absorber 150 , so that the cap 160 may be provided in a shape with a large surface area based on the same cross-section. For example, a plurality of irregularities may be provided on the cap 160 .

(Example 4-3) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 is enlarged at the end of the energy absorber 150 Including those provided in the shape that becomes.

In addition to the role of restraining the energy absorber 150 , the cap 160 also serves as a heat conductor for transferring heat generated from the energy absorber 150 , so it may be provided in an enlarged shape compared to the energy absorber 150 . For example, the cap 160 may be provided in an enlarged shape with a step difference or a cone-shaped enlarged shape. In addition, as shown in FIG. 5 in cross-sectional view, it may be manufactured to have a large cross-sectional area for conducting and dissipating heat.

(Example 4-4) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 protrudes from the upper and lower end plates. Including what is provided.

In addition to the role of restraining the energy absorber 150, the cap 160 also serves as a heat conductor for transferring heat generated from the energy absorber 150, and thus may be provided to protrude from the coupled upper and lower end plates. This constrains the energy absorber 150 and at the same time expands the volume for heat transfer, and performs the function of shear resistance with the upper and lower structures coupled to the upper and lower end plates at the same time. For example, the protruding cap 160 is recessed into the upper and lower plates.

(Example 4-5) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, the cap 160 is one end of the energy absorber 150. Including those provided only in

The cap 160 may be provided only at one end according to the coupling conditions of the energy absorber 150 , and may be provided at a separate location so as not to come into contact with the energy absorber 150 .

(Embodiment 4-6) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Embodiment 1-1, the cap 160 includes a laminated structure.

The cap 160 may be stacked or divided into multiple positions depending on conditions such as the shape (number, height, width, etc.) of the energy absorber 150 .

(Example 5-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, in Example 1-1, an upper plate ( 210); and a lower plate 220 provided at the lower end of the lower end plate, wherein the upper and lower plates and the upper and lower end plates are fixed with a fixing means 230; This includes being formed from high materials.

Upper and lower plates may be respectively provided on the upper and lower ends of the upper and lower end plates of the seismic isolator, and may be fixed through the mutual fixing means 230 .

The upper and lower end plates and the upper and lower plates may be formed of a material having higher thermal conductivity than the iron material 120 and the energy absorber 150 in the same temperature environment.

(Example 5-2) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure, and specifically, in Example 1-1, the cap 160 has the same vertical line as the energy absorber 150 It includes being further formed on the upper and lower plates of the upper body.

Caps 160 provided at both ends of the energy absorber 150 may be further provided on the upper and lower plates, which may be provided on the same vertical line as the energy absorber 150 .

(Example 6-1) The present invention relates to a configuration of a laminated elastic seismic isolator for supporting a bridge structure. Specifically, the cap 160 and the energy absorber 150 and/or the cap 160 and the cap Between 160, a thermal grease (thermal grease) is applied to increase heat conduction efficiency.

The seismic isolator is a seismic isolator utilizing the thermal conductivity of materials, and may further include applying thermal grease between the main heat transfer parts to secure contact between materials.

Br : Bridge G : Girder
S : Slab C : Coping P : Pile (pier, column)
10: seismic isolator
100: laminated elastic structure
110: elastic material
120: iron
131: upper end plate
132: lower end plate
140: through hole
150: energy absorber
160: cap
210: upper plate
220: lower plate
230: fixing means
300: measuring means

Claims (4)

In the configuration of a laminated elastic seismic isolator for supporting a bridge structure,
An elastic material 110 positioned between the upper structure and the lower structure and alternately stacked; and iron 120;
an upper end plate 131 formed at upper and lower ends of the elastic and iron material 120 stacked portion; and a lower end plate 132; a laminated elastic structure 100 comprising;
one or more through-holes 140 formed in the laminated elastic structure 100;
an energy absorber 150 disposed in the through hole 140 ;
a cap 160 positioned above and below the energy absorber 150 and constraining the energy absorber 150;
The cap 160; constrains the energy absorber 150, is provided to discharge heat generated according to regular and earthquake behavior, and has a thermal conductivity higher than that of the iron material 120 and the energy absorber 150 in the same temperature environment This is a high material, and the cap 160 includes at least one selected from aluminum, gold, silver, bronze, and brass, and the elastic material is formed of a rubber material;
The laminated elastic seismic isolator for supporting a bridge structure, wherein the energy absorber is formed of any one or more combinations selected from lead, tin, bismuth, zinc, and aluminum.
According to claim 1,
The cap 160 is a laminated elastic seismic isolator for supporting a bridge structure, which includes being provided in an enlarged shape at the end of the energy absorber.

According to claim 1,
The cap 160 is a laminated elastic seismic isolator for supporting a bridge structure, comprising fixing means 230 to the upper and lower end plates.
According to claim 1,
an upper plate 210 provided on the upper end of the upper end plate 131; and a lower plate 220 provided at the lower end of the lower end plate 132; the upper and lower plates and the upper and lower end plates are fixed with a fixing means 230; 150), a laminated elastic seismic isolator for supporting a bridge structure comprising one formed of a material having a higher thermal conductivity.

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