KR-20260067572-A - Bridge elasticity support apparatus

Abstract

The present invention relates to a bridge bearing capable of stably supporting vertical loads and displacements while maintaining a sufficiently stable state prior to the application of external forces, such as those caused by earthquakes, and preventing damage or abnormalities to the bridge caused by external forces. The bearing is characterized by comprising: a lower plate fixedly installed on a substructure; an upper plate installed on the upper part of the lower plate at a distance from the lower plate, with an upper structure fixedly installed on its upper surface; an elastic body installed between the lower plate and the upper plate, with its lower surface fixed to the upper surface of the lower plate and its upper surface fixed to the lower surface of the upper plate; and a friction resistance means that resists relative movement between the lower plate and the upper plate by means of friction.

Inventors

• 김선중

Assignees

• 김선중

Dates

Publication Date

20260513

Application Date

20241106

Claims (1)

1. Bottom plate fixedly installed in the substructure, A top plate installed on the upper part of the bottom plate, spaced apart from the bottom plate, and having an upper structure fixedly installed on its upper surface. An elastic body installed between the lower plate and the upper plate, wherein the lower surface is fixed to the upper surface of the lower plate and the upper surface is fixed to the lower surface of the upper plate. Characterized by comprising a friction resistance means that resists relative movement of the lower plate and the upper plate by means of friction. bridge bearings

Description

Bridge elasticity support apparatus} The present invention relates to a bridge bearing, and more specifically, to a bridge bearing installed between a bridge superstructure and a bridge pier to support a load acting on the superstructure and accommodate displacement. Generally, bridge bearings are installed between the superstructure, such as the bridge deck, and the piers to support vertical loads and accommodate horizontal displacements, while mitigating and attenuating vibrations or shocks during the occurrence of dynamic loads, such as earthquakes. An example of such a bridge bearing is Korean Registered Patent Publication No. 10-2583618 (published on October 4, 2023), which is characterized by comprising a top plate coupled to a bridge deck, an elastic pad disposed below the top plate, and a bottom plate coupled to the lower side of the elastic pad and fixedly coupled to a bridge pier or abutment. However, these conventional bridge bearings not only have difficulty effectively dampening externally applied vibrations, but also present a problem in that it is difficult to verify the intensity, direction, and impact amount of the applied external force. FIG. 1 is a perspective view illustrating a bridge bearing according to the present invention. FIG. 2 is an exploded perspective view illustrating a bridge bearing according to the present invention. FIG. 3 is a cross-sectional view illustrating a bridge bearing according to the present invention. FIG. 4 is an explanatory diagram illustrating the operating principle of a part of a bridge bearing according to the present invention. A preferred embodiment of a bridge bearing according to the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a perspective view illustrating a bridge bearing according to the present invention, FIG. 2 is an exploded perspective view illustrating a bridge bearing according to the present invention, FIG. 3 is a cross-sectional view illustrating a bridge bearing according to the present invention, and FIG. 4 is an explanatory diagram explaining the operating principle of a part of the bridge bearing according to the present invention. As illustrated in FIGS. 1 to 3, the bridge bearing (1) according to the present invention comprises a lower plate (2) that is fixedly installed on a lower structure such as a bridge pier, an upper plate (3) that is installed on the upper part of the lower plate (2) at a distance from the lower plate (2) and on the upper surface of which an upper structure such as a bridge deck is fixedly installed, and an elastic body (4) that includes a rubber material component installed between the lower plate (2) and the upper plate (3), with the lower surface fixed to the upper surface of the lower plate (2) and the upper surface fixed to the lower surface of the upper plate (3). Here, the bottom plate (2) and the top plate (3) are composed of square plates made of steel and are fixed through fastening means such as bolts and anchor bolts, and the elastic body (4) is formed in the shape of a rectangular parallelepiped. Through this, when an external force is transmitted through the upper structure or lower structure, the elastic body (4) deforms, thereby primarily mitigating and attenuating the transmitted shock. In addition, the present invention further provides a plurality of friction plates (5) that are laminated and installed on the outer side of the elastic body (4), with one surface layer made of stainless steel and the other surface layer made of a friction material. Here, the friction plate (5) is formed in the shape of an L-shape plate and is installed side by side on the outside of one side of the elastic body (4) and the adjacent side, and the friction plate (5) in a single layer is formed as a pair and arranged in a square shape. PTFE, etc., can be used as the friction material. Through this, when an external force is transmitted, the stacked friction plates (5) move relative to each other as shown in FIG. 4, thereby changing the overall stacked shape and absorbing energy, which secondarily mitigates and attenuates the impact. At this time, the impact energy is converted into thermal energy and dissipated into the atmosphere due to friction caused by the friction material on the surface of the stacked friction plates (5). In addition, the present invention further comprises a plurality of elastic plates (6) each disposed on the outer side of the outer surface of each of the stacked friction plates (5) and having their lower ends fixed to the bottom plate (2). The elastic plates (6) are made of metal and undergo elastic deformation when an external force is applied, and then restore when the external force is removed. Through this, the external force is relieved and attenuated in a third manner, and the friction plate (5) deformed by the action of the external force returns to its original position. Specifically, when the external force is applied, the st