CN212052278U - Anti-seismic damping anti-falling beam structure - Google Patents

Abstract

The utility model belongs to the technical field of bridges, and discloses an anti-seismic damping anti-drop beam structure. Its main technical features are: including the beam body and the pier of the bridge, the two are connected by concave and convex, and rubber dampers composed of rubber pads are arranged on both sides of the connecting bumps constituting the beam body or the pier, A rigid connecting rod mechanism is arranged between the grooves and the projections of the beam body and the bridge pier that constitute the bridge. The anti-seismic damping anti-drop beam structure can effectively protect the bridge from damage, can effectively control the dislocation of the beam body on the support body such as the pier, can prevent the beam body from falling, and prevent the upper and lower beam bodies from colliding and causing damage between the beam body or the bridge piers .

Description

An anti-seismic damping anti-drop beam structure

technical field

The utility model belongs to the technical field of bridge beam body components, and in particular relates to an anti-seismic damping anti-falling beam structure capable of preventing bridge beam bodies from colliding and falling.

Background technique

Earthquakes, especially high-magnitude, high-intensity and frequent occurrences, can cause damage to bridge structures—that is, falling beam damage and collision damage. Falling beam damage refers to the separation of the upper structure of the bridge from the lower structure supporting it, that is, the separation of the main beam from the pier or abutment, causing the main beam to hang, break, or fall. Collision damage refers to the phenomenon that the upper structure of the bridge between adjacent links, that is, the gap between the main beams is completely compressed and collides with each other, resulting in the fragmentation of the end of the main beam.

The utility model patent with the Chinese patent number of 201720898180.9 and the authorized announcement number of CN 207073063U discloses an anti-drop beam bridge structure. The structure of the anti-drop beam bridge cannot meet the large deformation of the bridge itself due to changes in climate and temperature, which is manifested in the installation position of structure B at the joint of two adjacent beam bodies. The need for large deformations. It should not be too large here, which will have a serious impact on the passage of vehicles on the bridge deck. Therefore, the installation position and structure of structure B (structure B is composed of shock-absorbing rubber blocks, connecting bolts, pressing plates, shock-absorbing rubber columns, etc.) greatly compresses the beam body due to the loose waves of various materials compared with the space occupied by its volume. Large deformation; at the same time, the structure cannot effectively provide the generation of the spatial disaster displacement between the beam and the pier and abutment generated by the seismic longitudinal wave.

Utility model content

The purpose of the present utility model is to provide an anti-seismic damping anti-falling beam structure that can not only prevent the beam body from falling, but also prevent the upper and lower beam bodies from colliding.

To achieve the above object, the technical scheme adopted by the present utility model is:

An anti-seismic damping and anti-falling beam structure includes a beam body and a pier of a bridge, the two are connected by concave and convex, and rubber pads composed of rubber pads are arranged on both sides of the connection bumps constituting the beam body or the pier. The damper is provided with a rigid connecting rod mechanism for piercing the beam body and the pier of the bridge between the groove and the convex block.

The additional technical features constituting the above-mentioned anti-seismic damping anti-drop beam structure also include:

——A support mechanism is provided at the concave and convex connections constituting the beam body and the bridge pier;

——The rubber backing plate is composed of a rubber sheet and a steel backing plate arranged at intervals to form a vulcanized whole;

——The rubber backing plate is provided with a spring plate; the spring plate is composed of small spring plates symmetrically arranged on both sides of the rigid connecting rod mechanism, or the spring plate is a large spring plate, in this The center of the large spring plate is provided with a central hole through which the rigid connecting rod passes;

——The spring plate is provided with a number of vulcanization holes to improve the connection strength of the rubber sheets on both sides thereof.

Compared with the prior art, the anti-seismic damping anti-drop beam structure provided by the utility model has the following advantages: firstly, because the beam body and the bridge piers constituting the structure are connected by concave and convex, and the connection between them is Both sides of the bump are provided with rubber dampers composed of rubber pads. The dampers can effectively deform the forces generated by the shear waves and surface waves brought by the earthquake to produce great damping performance, that is, movement. The hysteresis (the deformation of the rubber lags behind the stress of the rubber during the stress process), so as to effectively protect the bridge from damage and effectively control the dislocation of the beam body on the support body such as the pier; The upper structure of the bridge and the lower structure of the bridge are effectively connected, so it can effectively prevent the separation and fall of the upper structure of the bridge and the lower structure of the bridge caused by the seismic longitudinal wave when the geological disaster occurs. The integral structure formed by the vulcanization of the sheet and the spaced steel lining plates can effectively restrict the lateral deformation of the damping rubber, prevent the rubber part from being damaged due to excessive deformation when the damping rubber part is subjected to excessive force, and improve the use of the bridge. life.

Description of drawings

Fig. 1 is the structural schematic diagram of the anti-seismic damping anti-drop beam structure provided by the utility model;

Fig. 2 is the first structural schematic diagram of the rubber backing plate in the above-mentioned anti-falling beam structure;

FIG. 3 is a schematic diagram of a second structure of the rubber backing plate in the above-mentioned anti-falling beam structure.

Detailed ways

The structure and working principle of the anti-seismic damping anti-drop beam structure provided by the present utility model will be further described below with reference to the accompanying drawings and specific implementation examples.

As shown in FIG. 1 , the structure constituting the anti-seismic damping anti-drop beam structure provided by the present utility model includes a bridge beam body 2 whose bottom is a protruding block 1 and a bridge pier 4 whose upper part is a groove 3 corresponding to the above-mentioned protruding block, That is, there is a concave and convex connection between the two, and a support mechanism 5 is provided at the connection, and a rubber damper 6 composed of a rubber backing plate is provided on both sides of the connection bump that constitutes the beam body, and a rigid connecting rod is provided. The mechanism 7 passes through the grooves and projections of the beam body and the piers constituting the bridge, and the two ends thereof are fixed together by bolts 10 (or other riveting structures).

The principle is that two rubber dampers are distributed on both sides of the bridge connecting bump structure, and a rigid connecting device is used to effectively connect the bridge upper structure and the bridge lower structure. The rigid connection device can effectively prevent the separation of the upper structure of the bridge and the lower structure of the bridge caused by the seismic longitudinal wave when the geological disaster occurs; and the two special rubber dampers function effectively to the shear wave and surface wave caused by the earthquake. Through the deformation of the special rubber damper, the friction between the internal molecules of the rubber part makes it have a very large and reliable damping performance, that is, the hysteresis of motion (the deformation of the rubber lags behind the stress of the rubber during the force process ). This effectively protects the bridge from damage. A large amount of practical experience has proved that by using the unique viscoelasticity of rubber, in the process of vibration, under the action of external force, severe internal friction is caused, reaction force is generated, kinetic energy is converted into heat energy, and energy conversion is realized, thereby effectively reducing the vibration amplitude. the goal of. In addition, the greater the force generated by the shear wave and surface wave brought about by the earthquake, the greater the deformation of the special rubber damper, the greater the reaction force generated, and the more intense the internal friction, and the greater the energy conversion. .

In the structure constituting the above seismic damping anti-drop beam structure:

In order to effectively restrict the lateral deformation of the rubber pad, and prevent the rubber pad from being damaged due to excessive deformation of the rubber pad when it is subjected to excessive force;

- The above-mentioned rubber backing plate is composed of an integral vulcanized rubber sheet 61 and a steel backing plate 62 arranged at intervals; or

——As shown in Figure 2, the rubber backing plate is composed of two small spring plates 621 covered by rubber 611, and the small spring plates are symmetrically arranged on both sides of the rigid connecting rod mechanism; or the structure shown in Figure 3 , that is, a large spring plate 622 with a central hole 8 through which a rigid connecting rod passes through a center of the rubber coating is formed, that is, the rigid connecting rod is fixed through the central hole; in order to further improve the integrity of the vulcanization between the spring plate and the rubber , a number of vulcanization holes 9 are arranged on the spring plate.

And by adding reinforced steel plates to the internal structure, the lateral deformation of the damping rubber is effectively restricted, and the rubber part is prevented from being damaged due to excessive deformation of the damping rubber part when it is subjected to excessive force.

The structure constituting the above-mentioned anti-seismic damping anti-drop beam structure can also be a bridge beam body with a groove at the bottom and a bridge pier with a convex block corresponding to the above groove at the top, that is, the connection between the two is also concave and convex. , and a support mechanism is provided at its connection, a rubber damper composed of rubber pads is provided on both sides of the connection bumps that constitute the above-mentioned bridge piers, and the rigid connecting rod mechanism passes through the beams and piers that constitute the bridge. The grooves and bumps hold the two together.

Claims (5)

1. The utility model provides a roof beam structure is prevented falling in antidetonation damping which characterized in that: the bridge comprises a beam body and a bridge pier of the bridge, wherein the beam body and the bridge pier are in concave-convex connection, rubber dampers composed of rubber base plates are arranged on two sides of a connecting lug of the beam body or the bridge pier, and a rigid connecting rod mechanism which penetrates the beam body and the bridge pier together is arranged between a groove and a lug of the beam body and the bridge pier.

2. An earthquake-resistant damping fall-preventing beam structure as defined in claim 1, wherein: and a support mechanism is arranged at the concave-convex connection part of the beam body and the pier.

3. An earthquake-resistant damping fall-preventing beam structure as defined in claim 1, wherein: the rubber backing plate is formed by vulcanizing a rubber sheet and steel lining plates arranged at intervals into a whole.

4. An earthquake-resistant damping fall-preventing beam structure as defined in claim 1, wherein: a spring plate is arranged in the rubber base plate; the spring plate is composed of small spring plates symmetrically arranged on two sides of the rigid connecting rod mechanism, or the spring plate is a large spring plate, and a central hole through which the rigid connecting rod passes is arranged in the center of the large spring plate.

5. An earthquake-resistant damping fall-preventing beam structure as defined in claim 4, wherein: the spring plate is provided with a plurality of vulcanization holes for improving the connection strength of the rubber sheets on the two sides of the spring plate.

Images