CN104499426B - Vibration-absorbing and isolating support for pier bottom using rocking rolling device and steel plate energy dissipator - Google Patents

Abstract

The present invention discloses a pier bottom seismic isolation bearing utilizing a rocking and rolling device and a steel plate energy absorber, comprising: an upper bearing plate, a lower bearing plate, and a bearing body. The upper bearing plate, the lower bearing plate, and the bearing body are embedded and assembled by means of a protruding hemisphere and a hemispherical groove. The outer edge of the hemispherical groove of the bearing body is processed into a horizontal plane around it, and gradually transformed into a spherical surface around it to realize a rocking-rolling mechanism. The steel plate energy absorber cover is arranged outside the gap between the lower bearing plate and the upper bearing plate to form an energy dissipation mechanism. The present invention adopts the above technical solution, reduces the seismic effect borne by the upper bridge structure through the rocking-rolling mechanism, consumes seismic energy through the energy dissipation mechanism, and is convenient for post-earthquake repair.

Description

Vibration-absorbing and isolating support for pier bottom using rocking rolling device and steel plate energy dissipator

technical field

The invention relates to a novel bridge structure system, in particular to a novel pier bottom shock-absorbing and isolating support utilizing a rocking rolling device and a steel plate energy dissipator.

Background technique

Previous major earthquakes at home and abroad have caused serious damage to bridge piers and caused bridge collapse. Using shock absorption and isolation technology to reduce the seismic force on bridge piers and superstructures and ultimately improve the seismic capacity of bridges is very important for ensuring the safety of traffic lifelines. significance. The idea of using shock-absorbing and isolating devices to improve the seismic capacity of bridges is a very promising technology.

At present, the commonly used bridge seismic isolation devices are mostly installed on the top of the pier. This method is not suitable for bridges that are just connected to the top of the pier, and the damaged pier after the earthquake is difficult to repair. Proposing a new type of shock-absorbing and isolating device to reduce the earthquake damage of bridge piers and quickly repair the damaged piers has always been the goal pursued by engineers, and it has not been solved well.

Contents of the invention

Aiming at the above technical problems, the present invention proposes a novel pier bottom shock-absorbing and isolating support using a rocking rolling device and a steel plate energy dissipator.

In order to achieve the above purpose, it is realized through the following technical solutions:

A new type of shock-absorbing and isolating bearing at the bottom of the pier using a rocking rolling device and a steel plate energy dissipator, including:

The upper support plate fixed on the lower end surface of the pier, the lower support plate fixed on the upper end surface of the foundation, the support body clamped between the upper support plate and the lower support plate, and the lower support plate and the upper support plate Steel plate energy dissipators between the support plates;

The steel plate energy dissipator cover forms an accommodating cavity for accommodating the support body outside the gap between the lower support plate and the upper support plate;

The upper end surface and the lower end surface of the support body are provided with hemispherical groove I and hemispherical groove II respectively. Set relative to the axial direction with the central axis of the support body as the reference;

The outer edge of hemispherical groove Ⅰ and hemispherical groove Ⅱ is horizontal, and gradually transforms into a spherical surface;

The lower end surface of the upper support plate is provided with a protruding hemisphere I for embedding in the hemispherical groove I; the end surface of the lower support plate is provided with a protruding hemisphere II for embedding in the hemispherical groove II;

The steel plate energy dissipator adopts steel plates with low yield strength, and the upper and lower ends of each steel plate are respectively fixed to the upper support plate and the lower support plate by bolt assemblies, and each steel plate has a vertical hole.

Adopt the present invention of above-mentioned technical scheme:

1. The upper bearing plate, the lower bearing plate and the bearing body constitute the vertical force transmission mechanism of the new type of pier bottom shock-absorbing and isolation bearing, which can withstand the vertical force of the pier under normal use and will not occur under strong earthquakes. The rocking-rolling mechanism greatly reduces the seismic force on the superstructure, thereby preventing the pier from being damaged under a major earthquake.

2. The protruding hemisphere ensures the self-resetting ability of the bearing after the rocking-rolling mechanism occurs under the earthquake, and can provide the lateral shear bearing capacity of the bearing.

3. The steel plate energy dissipator provides the energy dissipation capacity of the new pier bottom shock-absorbing and isolation bearing under an earthquake.

4. Under the action of earthquake, the damage of the new pier bottom seismic isolation bearing will concentrate on the steel plate energy dissipator, and the damaged steel plate energy dissipator can be quickly replaced, so as to quickly restore the seismic capacity of the new pier bottom seismic isolation bearing.

5. The new pier bottom shock-isolation bearing realizes the seismic design concept of "separation of functions". The upper support plate, lower support plate and support body form the vertical force transmission mechanism of the new pier bottom shock-isolation support , while the steel plate energy dissipator is mainly used for energy dissipation.

6. After adopting the new type of anti-seismic support at the bottom of the pier, both the upper pier and the anti-seismic support at the bottom of the pier can be prefabricated in the factory, and only need to be installed on site, which can greatly speed up the construction progress and reduce the impact on the traffic and surrounding environment during the construction process. influences.

Compared with traditional bridge bearings, the present invention has three outstanding advantages. One is that due to the occurrence of the rocking-rolling mechanism of the new pier base shock-absorbing and isolation bearing, it will greatly reduce the seismic force borne by the bridge pier and reduce the seismic damage of the bridge structure. . Second, after adopting the new type of pier bottom shock-absorbing and isolation bearing, the factory prefabrication of the pier can be realized, and only assembly is required on site, which can greatly speed up the construction progress and reduce the adverse impact of the construction process on urban traffic and the environment; third, Due to the design concept of “separation of functions” adopted for the new type of pier bottom seismic isolation bearing, the energy dissipation capacity is guaranteed by the steel plate energy dissipator, and the damaged steel plate energy dissipator can be quickly replaced after the earthquake, realizing the controllable damage of the pier’s seismic design , Repairable goals.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

The present invention has 4 drawings in total, wherein:

Fig. 1 is a schematic structural diagram of a top view of a novel pier bottom shock-isolation bearing of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the novel pier bottom shock-absorbing and isolating bearing of the present invention.

Fig. 3 is a fixed view of one steel plate of the steel plate energy dissipator of the present invention.

Fig. 4 is a side view structural schematic diagram of the pier and the foundation assembled in the present invention.

In the figure: 1. Upper support plate, 2. Lower support plate, 3. Support body, 3.1, Hemispherical groove I, 3.2, Hemispherical groove II, 4.1, Protruding hemisphere I, 4.2, Protruding hemisphere Body II, 5. Steel plate energy dissipator, 6. Bolt assembly, 7. Pier, 8. Foundation, A. Accommodating cavity.

detailed description

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the new type of pier bottom shock-absorbing and isolation bearing using the rocking rolling device and the steel plate energy dissipator includes: the foundation 8 and the bridge pier 7, and also includes,

The upper support plate 1 fixed on the lower end surface of the pier 7, the lower support plate 2 fixed on the upper end surface of the foundation 8, the support body 3 clamped between the upper support plate 1 and the lower support plate 2, and the setting A steel plate energy dissipator 5 between the lower support plate 2 and the upper support plate 1;

The steel plate energy dissipator 5 covers an accommodation cavity A for accommodating the support body 3 outside the gap between the lower support plate 2 and the upper support plate 1;

The upper surface and the lower surface of the support body 3 are respectively provided with a hemispherical groove I3.1 and a hemispherical groove II3.2, and the center lines of the hemispherical groove I3.1 and the hemispherical groove II3.2 coincide with the central axis of the support body 3 And the hemispherical groove I 3.1 and the hemispherical groove II 3.2 are arranged axially relative to the central axis of the support body 3;

The outer edges of the hemispherical groove I3.1 and hemispherical groove II3.2 are horizontal planes around, and gradually transform into spherical surfaces, that is, the horizontal plane fits with the corresponding parts of the lower support plate 2 and the upper support plate 1 to form a support part, the spherical surface is used to realize the swing;

The lower end surface of the upper support plate 1 is provided with a protruding hemisphere I 4.1 for embedding in the hemispherical groove I 3.1; the upper end of the lower support plate 2 is provided with a protruding hemisphere II 4 for embedding in the hemispherical groove II 3.2. 2;

The steel plate energy dissipator 5 adopts steel plates with low yield strength, and the upper and lower ends of each steel plate are respectively fixed to the upper support plate 1 and the lower support plate 2 by bolt assemblies 6, and each steel plate has a vertical hole.

Adopt the present invention of above-mentioned technical scheme:

1. The upper bearing plate, the lower bearing plate and the bearing body constitute the vertical force transmission mechanism of the new type of pier bottom shock-absorbing and isolation bearing, which can withstand the vertical force of the pier under normal use and will not occur under strong earthquakes. Swing-rolling mechanism (the spherical surface of the upper and lower end surfaces of the support body, the upper support plate and the lower support plate and the support body are formed by embedding and fitting of protruding hemispheres, as shown in Figure 2.), which greatly reduces the load on the upper structure Earthquake force, and then realize the bridge pier from damage under the earthquake.

2. The protruding hemisphere ensures the self-resetting ability of the earthquake pier after the rocking-rolling mechanism occurs relative to the foundation, that is, after the rocking occurs, the steel plate of the steel plate energy dissipator at the corresponding position will deform and consume energy. After the earthquake stops, the bridge pier can be connected to the foundation Backing up, the backing up process is realized by protruding the hemispherical body and the hemispherical groove of the support body, and then replacing the deformed steel plate of the steel plate energy dissipator to complete the recovery; at the same time, it can provide the lateral shear resistance of the support force.

3. The steel plate energy dissipator provides the energy dissipation capacity of the new pier bottom shock-absorbing and isolation bearing under an earthquake.

4. Under the action of earthquake, the damage of the new pier bottom seismic isolation bearing will concentrate on the steel plate energy dissipator, and the damaged steel plate energy dissipator can be quickly replaced, so as to quickly restore the seismic capacity of the new pier bottom seismic isolation bearing.

5. The new pier bottom shock-isolation bearing realizes the seismic design concept of "separation of functions". The upper support plate, lower support plate and support body form the vertical force transmission mechanism of the new pier bottom shock-isolation support , while the steel plate energy dissipator is mainly used for energy dissipation.

6. After adopting the new type of anti-seismic support at the bottom of the pier, both the upper pier and the anti-seismic support at the bottom of the pier can be prefabricated in the factory, and only need to be installed on site, which can greatly speed up the construction progress and reduce the impact on the traffic and surrounding environment during the construction process. influences.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Without departing from the scope of the technical solution of the present invention, the skilled person can use the technical content disclosed in the appeal to make some changes or modify it into an equivalent embodiment with equivalent changes, but any content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (1)

1. The shock-absorbing and isolating support at the bottom of the pier using a rocking rolling device and a steel plate energy dissipator, including: The upper support plate (1) fixed on the lower end surface of the pier (7), the lower support plate (2) fixed on the upper end surface of the foundation (8), and clamped between the upper support plate (1) and the lower support plate ( 2) between the support body (3), and the steel plate energy dissipator (5) arranged between the lower support plate (2) and the upper support plate (1); The steel plate energy dissipator (5) is covered outside the gap between the lower support plate (2) and the upper support plate (1), forming an accommodation cavity (A) for accommodating the support body (3); The upper surface and the lower surface of the support body (3) are respectively provided with hemispherical groove I (3.1) and hemispherical groove II (3.2), and the center lines of hemispherical groove I (3.1) and hemispherical groove II (3.2) are aligned with The central axis of the support body (3) coincides, and the hemispherical groove I (3.1) and the hemispherical groove II (3.2) are arranged opposite to each other with the central axis of the support body (3) as the reference axis; The outer edge of the hemispherical groove I (3.1) and the hemispherical groove II (3.2) is horizontal, and gradually transforms into a spherical surface; The lower end surface of the upper support plate (1) is provided with a protruding hemisphere I (4.1) for embedding the hemispherical groove I (3.1); the upper end surface of the lower support plate (2) is provided with a hemispherical groove for embedding The convex hemisphere of II (3.2) II (4.2); The steel plate energy dissipator (5) adopts steel plates with low yield strength, and the upper and lower ends of each steel plate are respectively fixed to the upper support plate (1) and the lower support plate (2) by bolt assemblies (6), and each steel plate There are vertical holes on it.