KR101962663B1 - Bridge supporter capable of being easily repaired for maintenance - Google Patents

Abstract

Disclosed is a bridge supporter, comprising: an upper plate; a lower plate spaced from the upper plate in the vertical direction; an elastic pad disposed between the upper plate and the lower plate; an upper wedge fixed on a lower surface of the upper plate; a lower wedge fixed on an upper surface of the lower plate; an intermediate wedge mounted on the lower wedge, facing a side surface of the upper wedge, and being broken in response to a horizontal force of at least a predetermined level; and a shear pin inserted into the lower wedge and the intermediate wedge and fixing the intermediate wedge and the lower wedge. The intermediate wedge can be sheared and fixed without welding or bolt-engagement so that the intermediate wedge can be easily replaced when the same is broken.

Description

[0001] BRIDGE SUPPORTER CAPABLE OF BEING EASILY REPAIRED FOR MAINTENANCE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a bridge support, more specifically, to a bridge support that is easy to maintain.

Generally, a vertical load acting on a superstructure is received between an upper structure and a lower structure of a bridge, and a relative displacement due to seasonal temperature changes, a wind, an earthquake or the like or a shear displacement acting horizontally is received, A bridge support is formed to extend the service life of the bridge. The bridge supports are installed considering the durability, the workability, the maintenance property, and the economical efficiency although there is a difference according to the characteristics of the bridge.

As shown in FIG. 1, the conventional bridge support comprises an upper plate 110, an elastic pad 130 provided between the lower plate 120 and the upper plate 110 and the lower plate 120, The bridge support of this configuration is installed between the upper structure and the lower structure of the bridge. When a horizontal displacement occurs in the bridge support, the elastic pad 130 deforms by shearing to absorb the displacement.

At this time, the wedge is installed in the bridge support to suppress excessive displacement. The function of the bridge wedge can be divided into the normal time and the seismic time.

First, the function of the bridge support wedge in the usual way can be thought of as the concept of a movable stage and a fixed stage in the same concept as that of a general steel support. A bridge wedge is attached to extend and contract the upper and lower structures of the bridge due to the normal temperature load of the bridge from the fixed end to the movable end. Also, it has a function of restricting the displacement of the bridge support against the normal load by resisting in the fixed end for the normal wind load or braking load.

However, in case of earthquake, the wedge is dropped and designed as a concept of resisting seismic horizontal force by the elastic pad of the bridge support. In case of normal wind load or temperature load, it is resisted by the wedge, but when the earthquake occurs, the wedge of the bridge support is dropped and does not resist against the earthquake lateral force. If the wedge of the bridge support does not fall off during the earthquake, the seismic load is concentrated at the fixed end as in the case of the steel support, so that excessive lateral force is transmitted to the bridge at the design level. It is possible. For example, the wedge can be designed to break at the occurrence of an earthquake so that the bridge support can cause shear deformation up to 150% of the pure rubber height, minimizing the damage caused by the earthquake.

For example, as shown in FIG. 1, the bridge support includes a wedge 140 fixed transversely to both lateral ends of the top plate 110 and the bottom plate 120, respectively. At this time, since the lower wedge 142 is disposed outside the upper wedge 141, lateral movement of the bridge support is limited.

These wedges 140 are typically secured by welding or bolted. For example, as shown in FIG. 1, a wedge 140 is fixed to both side ends of each of the upper plate 110 and the lower plate 120 through welding.

However, the bridge support fixing the wedge 140 by welding may cause a breakage of the upper plate 110 or the lower plate 120 corresponding to the breakage of the upper wedge 141 or the lower wedge 142 when an earthquake occurs The upper wedge 141 or the lower wedge 142 must be welded and fixed, so that the work is inconvenient and the elastic pad 130 may be damaged due to high temperature welding heat and flame.

Also, even when the wedge 140 is fixed by bolts, the bolt fastening operation is inconvenient, and when the bolt is damaged, it is difficult to replace the wedge.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a bridge support which can be easily replaced with a broken wedge.

A bridge support according to an embodiment of the present invention includes an upper plate, a lower plate vertically spaced from the upper plate, an elastic pad disposed between the upper plate and the lower plate, A lower wedge fixed to an upper surface of the lower plate, an intermediate wedge which is seated on the lower wedge and is opposed to a side surface of the upper wedge and is capable of breaking in correspondence with a horizontal force of a predetermined size or more, And a shear pin inserted into the lower wedge to shear the intermediate wedge and the lower wedge.

According to an embodiment, the intermediate wedge may include a front end fixing portion for surrounding the side surface of the lower wedge and inserted into the front end fin and an upper portion protruding upward from the front end fixing portion, facing the side surface of the upper wedge, And a rupture portion having a width smaller than that of the front end fixing portion.

According to an embodiment, the intermediate wedge further includes a notch connecting the front end fixing portion and the rupture portion, and having a smaller width than the rupture portion.

According to one embodiment, the front end fixing portion extends downward and is inserted into a groove formed in the upper surface of the lower plate.

According to one embodiment, a plurality of the front end pins are disposed along one direction.

According to the bridge support according to the present invention, the intermediate wedge can be sheared without welding or bolting using a shear pin on the lower wedge fixed to the lower plate. Therefore, when the intermediate wedge is broken, the damage of the lower wedge can be prevented, and the replacement of the intermediate wedge can be performed very easily.

1 is a sectional view showing a conventional bridge support.
2 is a perspective view illustrating a bridge support according to an embodiment of the present invention.
3 is a side view showing a bridge support according to an embodiment of the present invention.
4 is a cross-sectional view taken along the line I-I 'in Fig.
5 is a plan view showing a lower wedge and a shear pin of a bridge support according to an embodiment of the present invention.
6 is a side view showing a fracture behavior of a bridge support according to an embodiment of the present invention.
7 is a side view illustrating a process of separating a broken intermediate wedge of a bridge support according to an embodiment of the present invention.
8 is a side view showing a bridge support according to another embodiment of the present invention.
9 is a side view showing a bridge support according to another embodiment of the present invention.
10 is a cross-sectional view illustrating a bridge support according to another embodiment of the present invention.

Hereinafter, a bridge support according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

In the following description, the term "during an earthquake" means a case where a horizontal force equal to or greater than a predetermined magnitude such as an earthquake is applied to a bridge. In the case of "normal ", a horizontal force is not applied or a wind load smaller than a predetermined size, .

2 is a perspective view illustrating a bridge support according to an embodiment of the present invention. 3 is a side view showing a bridge support according to an embodiment of the present invention. 4 is a cross-sectional view taken along the line I-I 'in Fig. 5 is a plan view showing a lower wedge and a shear pin of a bridge support according to an embodiment of the present invention.

2, the bridge support comprises an upper plate 10, a lower plate 20 vertically spaced from the upper plate 10, and a lower plate 20 disposed between the upper plate 10 and the lower plate 20 And an elastic pad 30.

The lower plate 20 may be disposed on a lower structure of the bridge, for example, a bridge. The upper plate 10 may be combined with a superstructure of the bridge, for example, a bridge top plate. The lower plate 20 and the upper plate 10 may be formed of a metal such as steel or the like and may have a rectangular or circular shape in a plan view.

3 and 4, an upper wedge 46 is coupled to the upper plate 10, and a lower wedge 42 is coupled to the lower plate 20. An intermediate wedge 44 is seated on the lower wedge 42 and the intermediate wedge 44 is sheared against the lower wedge 42.

For example, the upper wedge 46 may be fixed to the lower surface of the upper plate 10. The lower wedge 42 may be fixed to the upper surface of the lower plate 20. According to one embodiment, on a plan view, the upper wedge 46 may be disposed between the elastic pad 30 and the intermediate wedge 44. The intermediate wedge 44 projects upwardly from the lower wedge 42, and a portion of the intermediate wedge 44 faces the side of the upper wedge 46. Therefore, it can play a role of restricting the horizontal displacement of the bridge support at normal times. For example, the upper wedge 46 and the lower wedge 42 may be securely fixed to the upper plate 10 and the lower plate 20, respectively, by welding.

According to one embodiment, a front end pin 43 for shearing is disposed between the intermediate wedge 44 and the lower wedge 42. [ The front end pin 43 may serve to transmit the horizontal force applied to the intermediate wedge 44 to the lower wedge 42 and to fix the horizontal position of the front end pin 43.

For example, a portion of the shear pin 43 may be inserted into the lower wedge 42, and a portion may protrude from the lower wedge 42 and be inserted into the intermediate wedge 44. The intermediate wedge 44 can be shear-fixed to the lower wedge 42 and the lower plate 20 by the shear pin 43. Therefore, the displacement of the upper plate 10 can be limited at normal times.

For example, the front end pin 43 may have a pin, rod, or cylinder shape. Also, as shown in FIG. 5, a plurality of the front end pins 43 may be disposed along one direction.

The intermediate wedge 44 includes a front end fixing portion 44a into which the front end pin 43 is inserted and which is in contact with the lower wedge 42 and protrudes upward from the front end fixing portion 44a, And a rupture portion 44b facing the side surface of the wedge 46. [

For example, the front end fixing portion 44a may have a shape to surround at least a part of the side surface of the lower wedge 42. [ That is, at least a portion of the lower wedge 42 may be inserted into the intermediate wedge 44. This type of engagement can prevent tilting of the intermediate wedge 44 when the horizontal force is applied to the intermediate wedge 44 and prevent the intermediate wedge 44 from being dislocated by tilting.

According to one embodiment, the breaking portion 44b may have a smaller width than the front end fixing portion 44a. Stress is concentrated at the connection portion between the rupture portion 44b and the front end fixing portion 44a and the rupture occurs so that the rupture portion 44b And can be separated from the front end fixing portion 44a. Thus, without resistance by the intermediate wedge 44, shear deformation of the bridge support can occur.

The elastic pad 30 may be coupled to the upper plate 10 and the lower plate 20. The elastic pad 30 is capable of shear deformation. Accordingly, when the horizontal force is applied to the upper plate 10 or the lower plate 20, shear deformation can be accommodated.

According to one embodiment, the elastic pad 30 may include an elastic member 32 including an elastic material and a reinforcing plate 34 joined to the elastic member 32. In the elastic member 32, a plurality of the reinforcing plates 34 may be spaced from each other in the vertical direction. For example, the elastic material may include a rubber such as natural rubber, synthetic rubber, vulcanized rubber and the like. In addition, the elastic material may include a polymeric elastomer such as polyurethane or the like.

When a vertical load is applied to the bridge support, the elastic material inside the elastic pad 30 bulges, and the reinforcing plate prevents the elastic material from bulging. Thus, the load bearing capacity of the elastic material with respect to the vertical load is increased to accommodate the vertical load. Further, when a horizontal displacement occurs in the bridge support, the elastic pad 30 may be deformed by shearing to accommodate the displacement.

6 is a side view showing a fracture behavior of a bridge support according to an embodiment of the present invention. 7 is a side view illustrating a process of separating a broken intermediate wedge of a bridge support according to an embodiment of the present invention.

6, when an earthquake-induced horizontal force is applied to the bridge support, a horizontal force is transmitted to the intermediate wedge 44 by the upper wedge 46 coupled with the upper plate 10, Stress is concentrated on the connecting portion of the front end fixing portion 44a and breakage occurs so that the breaking portion 44b is separated from the front end fixing portion 44a. Therefore, shear deformation of the bridge support can be permitted.

Referring to Fig. 7, after the shear deformation of the bridge support is restored, the broken intermediate wedge 44 needs to be replaced. In the bridge support of the present invention, the intermediate wedge 44 is not engaged with the lower wedge 42 by welding or bolt, but is seated on the lower wedge 42 and sheared by shear pins. Thus, by lifting the intermediate wedge 44 in the upward direction, it can be easily separated from the lower wedge 42. Therefore, replacement can be easily performed when it is damaged by an earthquake or the like.

8 is a side view showing a bridge support according to another embodiment of the present invention.

8, the bridge support comprises an upper plate 10, a lower plate 20 vertically spaced from the upper plate 10, and a lower plate 20 disposed between the upper plate 10 and the lower plate 20, And an elastic pad 30.

An upper wedge 46 is coupled to the upper plate 10 and a lower wedge 42 is coupled to the lower plate 20. An intermediate wedge 44 is seated on the lower wedge 42 and the intermediate wedge 44 is sheared against the lower wedge 42 by a shear pin in a manner similar to that shown in Fig.

The intermediate wedge 44 includes a front end fixing portion 44a into which the front end fin is inserted and which surrounds at least a part of a side surface of the lower wedge 42 and an upper end protruding upward from the front end fixing portion 44a, And a rupture portion (44b) facing the side surface of the upper wedge (46). A notch 44c is formed between the rupture portion 44b and the front end fixing portion 44a. The notch 44c may be a region where a groove is formed to reduce the width. Therefore, the notch 44c has a smaller width than the rupture portion 44b. Therefore, when the horizontal force is applied, breakage may occur in the notch 44c.

Various other methods and shapes can be applied to the design of the portion where the fracture occurs in the bridge support of the present invention.

9 is a side view showing a bridge support according to another embodiment of the present invention.

9, the bridge support comprises a top plate 10, a bottom plate 20 spaced vertically apart from the top plate 10, and a bottom plate 20 disposed between the top plate 10 and the bottom plate 20 And an elastic pad 30.

An upper wedge 46 is coupled to the upper plate 10 and a lower wedge 42 is coupled to the lower plate 20. An intermediate wedge 44 is seated on the lower wedge 42 and the intermediate wedge 44 is sheared against the lower wedge 42 by a shear pin in a manner similar to that shown in Fig.

The intermediate wedge 44 includes a front end fixing portion 44a into which the front end fin is inserted and which surrounds the side surface of the lower wedge 42 and an upper end protruding upward from the front end fixing portion 44a, And a rupture portion 44b which faces the side surface of the base portion 46. [ In the present embodiment, the front end fixing portion 44a extends downward and is inserted into a groove formed in the upper surface of the lower plate 20. [ This configuration reinforces the shearing of the intermediate wedge 44 and can further suppress tilting.

10 is a cross-sectional view illustrating a bridge support according to another embodiment of the present invention.

Referring to Figure 10, the bridge support comprises an upper plate 10, a lower plate 20 spaced vertically from the upper plate 10, and a lower plate 20 disposed between the upper plate 10 and the lower plate 20 And an elastic pad 30.

An upper wedge 46 is coupled to the upper plate 10 and a lower wedge 42 is coupled to the lower plate 20. An intermediate wedge 54 is seated on the lower wedge 42 and the intermediate wedge 54 is shear fixed to the lower wedge 42 by a shearing pin 43.

The intermediate wedge 54 may not extend downwardly so as to surround the side surface of the lower wedge 42. In this case, the intermediate wedge 54 may be sheared by the shearing pin 43. [

According to the present invention, the intermediate wedge can be sheared without welding or bolting using a shear pin on the lower wedge fixed to the lower plate. Therefore, when the intermediate wedge is broken, the damage of the lower wedge can be prevented, and the replacement of the intermediate wedge can be performed very easily.

In addition, since the shear pin can shear the intermediate wedge in all directions, it is possible to prevent the horizontal position from changing along the extending direction of the lower wedge or the like.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

The bridge support according to the present invention can be used in an architecture, a bridge, a plant, an offshore structure, or the like.

Claims (5)

An upper plate;
A lower plate spaced vertically from the upper plate;
An elastic pad disposed between the upper plate and the lower plate;
An upper wedge fixed to a lower surface of the upper plate;
A lower wedge fixed to an upper surface of the lower plate;
An intermediate wedge that is seated on the lower wedge without welding or bolting and is opposed to a side surface of the upper wedge and is capable of breaking in accordance with a horizontal force of a predetermined size or more; And
And a shear pin inserted into the lower wedge and the intermediate wedge to shear the intermediate wedge and the lower wedge,
The intermediate wedge
A front end fixing part surrounding the side surface of the lower wedge, into which the front end fin is inserted; And
And a rupture portion projecting upward from the front end fixing portion and facing the side surface of the upper wedge and having a width smaller than that of the front end fixing portion,
Wherein the front end fixing portion extends downward along both side surfaces of the lower wedge and is inserted into a pair of grooves formed on the upper surface of the lower plate. delete The bridge support as claimed in claim 1, wherein the intermediate wedge further comprises a notch connecting the front end fixing portion and the breaking portion and having a smaller width than the breaking portion. delete The bridge support according to claim 1, wherein a plurality of shear pins are disposed along one direction.

Images