KR100784609B1 - Anti-seismic bridge bearing - Google Patents

Abstract

An anti-seismic bridge bearing is provided to take seismic isolation effect by using a complex function of a damper assembly and an elastic pad and to make the displacement control of a bridge deck possible while fulfilling the conventional functions of a bridge bearing. An anti-seismic bridge bearing is formed by coupling an upper plate(10) to a bridge deck, coupling a lower plate(20) to a pier of the bridge and installing an elastic pad(30) between the upper and lower plates, wherein a pair of inner and outer wedges(14,16) are installed at two sides of the upper plate adjacent to the elastic pad and a pair of damper assemblies(40) is installed at the lower plate adjacent to the elastic pad between the inner and outer wedges. The damper assembly includes a fixed sheet member(42) fixed to the lower plate, plural damper units(44) erected on the fixed sheet member, and a horizontal member(46) coupled to the upper part of the damper unit horizontally and located between the inner and outer wedges when assembled.

Description

Anti-seismic bearing for bridges {Anti-seismic Bridge Bearing}

Figure 1 is an exploded perspective view showing a representative example of a conventional bridge bearing,

FIG. 2 is a longitudinal sectional view of an installation state of an example illustrated in FIG. 1; FIG.

3 is an exemplary operation state of FIG.

4 is an exploded perspective view showing main parts as a preferred example of the present invention;

5 is a longitudinal sectional view showing an installation state of the example illustrated in FIG. 4;

6 is an enlarged view illustrating main parts of FIG. 5;

7 is an exploded perspective view of the main part of FIG. 4;

8 is an exemplary view of an operating state of FIG. 5.

<Explanation of symbols for the main parts of the drawings>

1: tops, 2: piers,

10: upper plate, 12,14,16,22: wedge,

20: lower plate, 30: elastic pad,

40: damper assembly, 42: fixed seat member,

44: damper unit, 46: horizontal member,

50,52: LUD (Lock Up Device)

The present invention relates to a support for bridges, in particular, as a seismic support by a composite function of a damper assembly having energy dissipation function due to elasticity and plastic deformation of steel and an elastic pad by restoring function with elastic behavior. The present invention relates to a seismic bearing device for bridges that has a seismic bearing function for controlling the movement of the upper plate within the elastic deformation of the steel damper unit and facilitates replacement of components during maintenance.

In general, a bridge has a structure in which an upper plate is placed on an upper part of a pier, and a bridge support of an elastic support structure is installed between the upper plate and the pier. In addition, it is used for the purpose of accommodating elastic deformation and horizontal wind load caused by the change of temperature and mitigating the impact on the bridge due to earthquakes.

Regarding such bridge bearings, there are known Korean Registered Patent Publication No. 10-419252, National Registered Patent Publication No. 10-554003, and National Registered Patent Publication No. 10-610586, which are shown in FIGS. The upper and lower plates 10 are fixedly installed on the upper plate 1 of the bridge, and the lower plate 20 is fixedly installed on the bridge pier 2 of the bridges. The elastic pads 30 are positioned between the 10 and 20, and the upper and lower plates 10 and 20 are provided with wedges 12 and 22, respectively, so that they can be assembled in a state where they are hung together inside and outside. .

At this time, the elastic pad 30 is provided to elastically support the load of the upper plate 1 and the upper plate 10 and to allow horizontal displacement of the upper plate 1 and the wedges 12 and 22 are mutually It plays a role of limiting the relative movement of the upper plate 1 relative to the pier 2 or the movement caused by the contraction and expansion of the upper plate, and when a large horizontal force such as an earthquake acts, it collides with each other to deform or break, absorbing or dispersing impact force The design is designed to perform a function to mitigate.

However, the conventional bridge bearing of this type is difficult to replace during deformation or breakage of the wedges 12 and 22 due to external forces, and excessive shear deformation of the elastic pad 30 when a large impact force such as an earthquake acts in the horizontal direction. Due to the large amount of movement of the top plate, the gap between the top plate and the top plate should be secured, resulting in higher cost for the construction of the joint part, resulting in lower economic efficiency, especially the wedges (12, 22). ) Although the impact force must be dispersed by breaking while impacting each other, breakage does not occur under a certain displacement due to the characteristics of the structure or the material, and only plastic deformation occurs, thereby closely pressing the elastic pad 30. It is more likely to cause damage.

The present invention has been made with the following objectives to solve such a conventional problem.

The main object of the present invention is to adopt a damper assembly having an energy dissipation function and an elastic pad having a restoring function by elastic behavior at the same time to ensure a seismic isolation effect by these complex functions, It is intended to be able to sufficiently perform the functions to support the elasticity of the bridge top plate, allow the expansion and contraction of the top plate, limit the displacement of the top plate, absorb or disperse the impact force while allowing displacement control.

Another object of the present invention is to configure the assembly to facilitate the replacement of the components in the case of deformation of the damper assembly or wedge, and in the case of the damper assembly to improve the coupling structure between the damper unit and the horizontal member is sufficient side force of the bridge top plate It is intended to be able to be prevented or suppressed.

In order to achieve the above object, the present invention is made by coupling the upper plate to the upper plate of the bridge and installing the lower plate to the bridge of the bridge, the elastic pad is installed in the center between the upper and lower plates, the elastic A pair of inner and outer wedges are installed on both sides of the upper plate as a position adjacent to the pad, and a pair of damper assemblies are installed on the lower plate as a position adjacent to the elastic pad, and the upper portion of the damper assembly is installed. The damper assembly includes a fixed seat member fixed to a lower plate, a plurality of damper units installed on the fixed sheet member, and the damper unit. Horizontally coupled to the upper portion of the horizontal member is located between the inner and outer wedges during assembly It provides a bridge bearing device comprising a.

Hereinafter, with reference to the accompanying drawings will be described in more detail and in detail on the basis of a preferred example of the present invention.

According to a preferred embodiment of the present invention as shown in Figure 4 to 8, the upper plate 10 of the bridge is coupled to install the upper plate 10 and the bridge pier (2) of the bridge to install the coupled plate In the center between the upper and lower plates 10 and 20, an elastic pad 30 is provided, but a pair of inner and outer sides on both sides of the upper plate 10 as a position adjacent to the elastic pad 30 is provided. Wedges 14 and 16 and 14 and 16 are respectively installed, and a pair of damper assemblies 40 are mounted on the lower plate 20 as a position adjacent to the elastic pad 30, but the damper assembly 40 is installed. ) Is installed so that the upper portion is located between the pair of inner and outer wedges (14, 16) (14, 16), the damper assembly 40 is fixed to the lower plate 20 fixed A member 42, a plurality of damper units 44 mounted on the fixed sheet member 42, and the damper unit. Will be written to the upper portion of 44 includes a horizontal member 46 that is located between the installation coupled in the horizontal and in the assembly, the outer spokes 14 and 16 (14 and 16).

At this time, the upper plate (1) and the upper plate (10), the pier (2) and the lower plate (20) are fasteners (1a) (2a) and fasteners (10a) which are pre-installed in the upper plate (1) and pier (2) 20a may be fixed to each other.

In addition, the inner wedge 14 of the pair of inner and outer wedges 14, 16 is a "L" cross-sectional shape is fixed in a manner such as welding with the upper plate 10, the inner and outer wedges (14, 16) Outer wedge (16) of the block form is formed by the coupling coupled to the separate coupling by the upper plate 10 and the fixing screw.

In addition, the fixing sheet members 42 of the damper assembly 40 are each fixedly installed on the upper portion of the lower plate 20 and screw grooves 42a for coupling the damper unit 44 to the inside are formed, respectively. The damper unit 44 of the damper assembly 40 has a lower portion screwed to the screw groove 42a, and an upper portion thereof is provided with a ball joint portion 44a, and a horizontal member 46 of the damper assembly 40. ) Is a pair of members 46a, 46a are formed so that the hemispherical mounting grooves 46b, 46b face each other and the ball joint portion 44a is fitted to the installation grooves 46b, 46b from the outside. The pair of members 46a and 46a are coupled to each other by the fixing pin 46c, and the configuration is made so that the side reaction force can be prevented while moving together according to the movement of the upper plate 1 by the inner wedge 14.

At this time, the horizontal member 46 of the damper assembly 40 extends pin coupling portions 46d and 46d at both ends thereof, and a pair of LUDs (Lock Up Device) on both sides of the upper plate 10 as corresponding positions. ) (50,50) (52, 52) is fixed and the piston rod (50a, 50a) (52a, 52a) of the LUD (50, 50) (52, 52), respectively, the pin coupling portion (46d, 46d) ) Can be configured to be combined with the seismic (耐震) and seismic isolation (冕 震) function, respectively.

In addition, it is preferable that the damper unit 44 of the damper assembly 40 is configured to have a circular cross section as a steel material so that the damper unit 44 has a directionality at the time of deformation so that the action is performed.

Next, the process of installation and operation of the present invention made as described above will be described.

When the bridge support device of the present invention is installed between the upper plate (1) and the bridge (2) of the bridge, the upper plate (10) is fasteners on the upper plate (1) of the bridge as illustrated in Figs. The lower plate 20 is coupled to the bridge pier 2 of the bridge by the fastener 20a and the elastic pad 30 is positioned between the upper and lower plates 10 and 20. Is installed, the horizontal member 46 of the damper assembly 40 fixed to the lower plate 20 is installed between the inner and outer wedges (14, 16), respectively, is installed, the LUD on the upper plate 10 In the case of adopting (50, 52), the piston rod (50a, 52a) of the LUD (50, 52) is coupled to the pin coupling portion (46d, 46d) of the horizontal member 46, the longitudinal direction of the upper plate (1) It is installed in accordance with each other so that they can work together.

Thus, the fixed load and the dynamic load applied from the upper part of the upper plate 1 are absorbed and accommodated by the elastic pad 30, and the horizontal horizontal force such as the wind load generated in the perpendicular direction of the throttle is a steel damper unit. (44) resists, and the top plate movement such as expansion and contraction caused by the change of the season or the temperature changes in the longitudinal direction of the LUD (50, 52) or the damper assembly (40) together with the elastic pad (30) The unit 44 is accommodated and behaves properly according to the situation, and fulfills the basic function as the bridge bearing.

In addition, when a strong impact is momentarily applied to the bridge due to an earthquake or the like, the behavior of the LUDs 50 and 52 is stopped, and the top plate 1 and the pier 2 are integrated, and the impact thereof is applied to the damper assembly 40. Transmitted to the unit 44 and the elastic pad 30, the operation is performed as illustrated in FIG. 8, for example, to generate an effect of avoiding, mitigating or absorbing an impact.

Moreover, the damper unit 44 and the hemispherical mounting groove 46b, which are horizontally fixed with the fixed seat member 42, are horizontally held by the horizontal member 46 of the damper assembly 40 which is normally coupled with the LUDs 50 and 52. 46b) and the ball joint portion 44a are coupled to each other in the form of a ball joint, so that the upper and lower plates 10 and 20 coupled to each other without being separated from each other are also coupled to the upper plate 1. It also maintains ancillary functions that can prevent side reactions.

In addition, when the outer wedge 16 or the damper assembly 40 is deformed due to the above impact, all of these components can be easily disassembled and assembled. .

As described above, according to the present invention, the damper assembly 40 having the energy dissipation function and the elastic pad 30 having the restoring function by the elastic behavior are simultaneously adopted to combine the LUD 50 and the 52. By the seismic isolation effect, the control of the bridge top plate 1 is possible, and the elastic support of the bridge top plate 1, which is the basic function of the bridge support, and the allowable contraction and expansion displacement of the top plate 1, Displacement control of the upper plate 1, sufficient to absorb or reduce the impact of the impact force can be performed sufficiently, its configuration is prefabricated, easy to replace the components when the damper assembly 40 or wedge 16 is deformed In the case of the damper assembly 40, the damper unit 44 and the horizontal member 46 may be improved in coupling structure to sufficiently prevent or suppress the side reaction force of the bridge top plate 1.

Claims (4)

The upper plate of the bridge is installed by combining the upper plate and the bridge of the bridge is installed by combining the lower plate, and between the upper and lower plates are made by installing an elastic pad, As a position adjacent to the elastic pad, the upper plate is provided with a pair of inner and outer wedges on each side, As a position adjacent to the elastic pad, a lower damper assembly is installed on the lower plate, and the upper part of the damper assembly is installed so as to be positioned between the pair of inner and outer wedges. The damper assembly includes a fixed seat member fixed to the lower plate, a plurality of damper units installed on the fixed sheet member, and horizontally coupled to an upper portion of the damper unit and installed between the inner and outer wedges during assembly. A seismic isolating device for a bridge, comprising a horizontal member to be positioned. The method of claim 1, A horizontal member of the damper assembly is formed to extend the pin coupling portion at both ends and the corresponding position as the upper plate is fixed to each of the pair of LUD on both sides and the piston rod of the LUD is coupled to the pin coupling portion, respectively Characteristic isolation base for bridges. The method of claim 1, The fixing sheet members of the damper assembly are fixed to the upper portion of the lower plate, respectively, and the screw groove for coupling the damper unit is formed inside, respectively, The damper unit of the damper assembly has a lower screwed to the screw groove, the upper portion of the ball joint is provided, respectively, the horizontal member of the damper assembly is a pair of members are formed so that hemispherical mounting grooves face each other the installation groove The bridge is characterized in that the configuration is made so as to be coupled to the pair of members by the fixing pin from the outside in the state coupled to the ball joint portion and the side reaction force is prevented while moving together according to the movement of the upper plate by the inner wedge Isolation Support. The method of claim 1, The damper unit (44) of the damper assembly (40) is configured to have a circular cross section as a steel material so as to have an action without deformation when deforming the base support device for a bridge.

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