CN102787554B - Anti-seismic abutment structure along bridge - Google Patents

Abstract

The invention discloses an anti-seismic bridge abutment structure along the bridge direction, which comprises a bridge pier, a bearing pad and a bridge superstructure, and the bearing pad is arranged between the bridge pier and the bridge superstructure; wherein, the The abutment structure also includes a rear board, which is arranged on the upper side of the pier, and the bridge superstructure is provided with a flange corresponding to the position of the rear board; A pre-destruction boss is arranged between the boards; a groove matching the pre-destruction boss is arranged on the rear board; an expansion joint is provided between the bridge superstructure and the rear board . The anti-seismic abutment structure along the direction of the bridge provided by the invention improves the anti-seismic capability of the bridge along the direction of the bridge, and at the same time, the invention also has the characteristics of simple structure and convenient construction.

Description

Seismic abutment structure along the direction of the bridge

technical field

The invention relates to the field of bridge anti-seismic technology, in particular to an anti-seismic abutment structure along the direction of the bridge.

Background technique

When the abutment structure is damaged by collision, if the abutment tilts, it will increase the span of the bridge and may cause beam drop damage, resulting in interruption of road traffic; Destruction will also bring great difficulties to road traffic and post-earthquake repair and reconstruction.

In an earthquake, besides the vertical earthquake, the bridge is also subjected to horizontal earthquakes in the direction of the bridge and the direction of the bridge (the direction of the bridge refers to the direction of the central axis of the bridge, and the direction of the bridge refers to the direction perpendicular to the central axis of the bridge. ) component of the role. Under the action of the along-bridge and transverse-bridge components, there are the following potential safety hazards: collision damage between the bridge superstructure and the abutment, tilting of the abutment, falling beams along the bridge, and large-area damage to the connected subgrade, etc.

The bridge abutment is the weak link in the bridge structure, usually after the bridge encounters a major earthquake, the bridge abutment will be seriously damaged. The abutment is the supporting part at both ends of the bridge, and it is the key part connecting the roadbed and the bridge structure. Since the longitudinal and transverse stiffness of the abutment are generally relatively large, it is difficult to form an effective ductile damping mechanism, and the allowable deformation is relatively small.

Therefore, those skilled in the art are committed to developing a kind of anti-seismic abutment structure along the bridge direction to overcome the earthquake damage along the bridge direction, and further overcome the collision damage between the bridge superstructure and the abutment, the inclination of the abutment, and the fall along the bridge direction. Defects such as large-area damage to beams and connected roadbed parts.

Contents of the invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an anti-seismic abutment structure along the direction of the bridge, so as to improve the anti-seismic capability of the bridge along the direction of the bridge.

In order to achieve the above object, the present invention provides an anti-seismic abutment structure along the bridge, including an abutment, a bearing block and a bridge superstructure, and the support block is arranged on the abutment and the bridge superstructure Between; wherein, the abutment structure also includes an abutment board, the abutment board is arranged on the upper side of the abutment, and the bridge superstructure is provided with a flange corresponding to the position of the abutment board; A pre-destroy boss is arranged between the abutment and the back plate of the platform; a groove cooperating with the pre-destroy boss is arranged on the back plate of the platform; the superstructure of the bridge and the platform An expansion joint is arranged between the rear boards.

Preferably, the pre-destruction boss and the abutment are integrally constructed.

Preferably, the distance between the flange and the back-up board is 50-60mm.

Preferably, a gap of 100-150 mm is reserved between the beam end surface of the part of the bridge superstructure below the flange and the abutment.

The beneficial effects of the present invention are:

Under the action of the earthquake, the bridge superstructure moves in the direction of the bridge, the flange hits the back plate of the abutment, the pre-destroyed boss first undergoes shear failure, and then the back plate is squeezed away from the abutment, thus giving Necessary relative movement space is reserved between the bridge superstructure and the abutment, so as to release seismic energy, avoid rigid collision damage to the abutment and connected roads, and improve the seismic capacity of the bridge along the bridge direction.

Simultaneously, the present invention also has the characteristics of simple structure and convenient construction.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a partially enlarged schematic diagram of A in FIG. 1 .

Detailed ways

As shown in Figure 1 and Figure 2, a specific embodiment of the anti-seismic abutment structure along the bridge direction of the present invention includes an abutment 1, a bearing pad 5 and a bridge superstructure 4, and the bearing pad 5 is arranged on the pier 1 and the bridge superstructure 4. Between the bridge superstructure 4.

Among them, the abutment structure also includes the rear abutment 3, which is arranged on the upper side of the abutment 1, and the bridge superstructure 4 is provided with a flange 7 corresponding to the position of the abutment 3; the abutment 1 and the abutment A pre-destruction boss 2 is arranged between the plates 3 .

Specifically, the pre-destroying boss 2 and the abutment 1 can be integrally constructed, and a groove that cooperates with the pre-breaking boss 2 is provided on the back plate 3 of the abutment.

As shown in FIG. 3 , an expansion joint 6 is provided between the bridge superstructure 4 and the back plate 3 . The distance L between the flange 7 and the back plate 3 is 50-60mm, and the height H of the flange 7 is 200mm.

The preferred distance L2 between the end surface of the lower beam of the upper structure 4 and the abutment 1 on the flange 7 is 100-150mm.

In this embodiment, when subjected to an earthquake, the bridge superstructure 4 moves along the direction of the bridge, and the flange 7 hits the back plate 3 of the platform, and the pre-destruction boss 2 first undergoes shear failure, and then the back plate 3 is squeezed away. abutment 1, thereby reserving the necessary relative movement space between the bridge superstructure 4 and the abutment 1, thereby releasing seismic energy, avoiding rigid collision damage to the abutment and the connected roads, and improving the stability of the bridge along the bridge direction. earthquake resistance.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (4)

1. A kind of anti-seismic abutment structure along the bridge, comprising abutment, bearing block and bridge superstructure, described bearing block is arranged between described abutment and described bridge superstructure, and described abutment The structure also includes a rear abutment, which is arranged on the upper side of the abutment; it is characterized in that: the upper structure of the bridge is provided with a flange corresponding to the position of the abutment; the abutment and the abutment A pre-damage boss is arranged between the back-of-platform boards; a groove matching the pre-destruction boss is arranged on the back-of-platform board; between the bridge superstructure and the back-of-platform board An expansion joint is provided. 2. The anti-seismic abutment structure along the bridge direction according to claim 1, characterized in that: the pre-destruction boss and the abutment are integrally constructed. 3. The anti-seismic abutment structure along the bridge direction according to claim 1, characterized in that: the distance between the flange and the butt plate behind the abutment is 50-60mm. 4. The anti-seismic abutment structure along the bridge direction according to claim 1, characterized in that: a gap of 100-150 mm is reserved between the beam end surface of the bridge superstructure below the flange and the abutment.

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