A high damping sliding energy dissipation limit simple bridge seismic stop device

Abstract

The present invention relates to the field of bridge seismic technology, and in particular to a high-damping sliding energy-dissipating position-limiting simple bridge seismic stopper device, comprising an arc-shaped stopper, a Y-shaped iron rod, a connecting rod and a sliding rod, wherein the arc-shaped stopper is an arc-shaped hollow structure, the bottom of which is fixed to the top of the bridge pier, and the front and rear side walls are arc-shaped limit plates protruding in the direction away from the main beam, and the inner cavity thereof is filled with a high-damping energy-dissipating buffer pad, and the high-damping energy-dissipating buffer pad forms a sliding cavity for sliding one end of the sliding rod along the vertical direction, and the other end of the sliding rod is connected to the Y-shaped iron rod by a connecting rod; the top end of the Y-shaped iron rod is hinged to the side wall of the main beam. The present invention can limit the multi-directional displacement of the main beam, and the device converts the kinetic energy of the main beam into internal friction heat energy, thereby achieving the effect of reducing damage.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake resistance, and in particular to a high-damping sliding energy-dissipating limiting simple bridge earthquake resistance stopper device. Background Art

[0002] China's transportation industry has developed rapidly, with hundreds of thousands or even millions of bridges rising from the ground. Earthquakes are the biggest enemy of bridges. Earthquakes can cause many problems for bridges, such as lateral displacement of bridges, especially the upper part of the bridge. When the lateral displacement is too large, the main beam will be dislocated or even overturned. Bridges are expensive, and once an irreversible bridge overturn occurs, the loss of economic value is huge. In order to reduce the damage to bridges caused by earthquakes, seismic blocks are usually set at the piers and cap beams at the beginning of bridge construction, and the structural function of the seismic blocks is used to reduce the damage to the bridge.

[0003] At present, most of the seismic blocks used in engineering projects are made of reinforced concrete, which has the advantages of simple construction and easy operation; however, it is mainly used to prevent large lateral displacements of bridges, and there are almost no restrictions on vertical displacements and small lateral displacements. Because it is a reinforced concrete structure with low toughness and high rigidity, it is prone to direct shear failure in the event of a large earthquake, which can easily cause damage to the main beam and pier. Because it is a reinforced concrete structure, it is not easy to repair when it is damaged. In view of the advantages and disadvantages of the above-mentioned traditional seismic blocks, it is necessary to design a device that can be highly multi-directional and can limit even small displacements and vertical displacements; it also has the function of buffering energy consumption, limiting large displacements of the bridge while reducing the damage to itself. At the same time, it also has the advantages of simple and convenient installation and easy post-earthquake repair or replacement. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-damping sliding energy-dissipating limit simple bridge seismic stop block device that can limit the multi-directional displacement of the main beam. The device converts the kinetic energy of the main beam into internal friction heat energy, thereby reducing damage; through the sliding limiter, it has a good limitation on small displacements, and at the same time can have a good limitation on larger displacements, it can also play an excellent role in limiting vertical displacements, and can also buffer rigid collisions to a great extent; it is simple to install and easy to replace after an earthquake.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0006] The present invention discloses a simple bridge anti-seismic stop block device with high damping, sliding energy dissipation and limiting, comprising an arc-shaped stop block, a Y-shaped iron rod, a connecting rod and a sliding rod. The arc-shaped stop block is an arc-shaped hollow structure, the bottom of which is fixed to the top of the pier, and the front and rear side walls are arc-shaped limiting plates protruding in the direction away from the main beam, and the inner cavity is filled with a high damping, energy dissipation buffer pad, and the high damping, energy dissipation buffer pad forms a sliding cavity along the vertical direction for sliding one end of the sliding rod, and the other end of the sliding rod is connected to the Y-shaped iron rod by a connecting rod; the top end of the Y-shaped iron rod is hinged to the side wall of the main beam.

[0007] The Y-shaped iron rod includes a sleeve and a telescopic rod. The top end of the sleeve is hinged to the side wall of the main beam, and the bottom end thereof axially forms a groove for fitting onto the top end of the telescopic rod. The telescopic rod is an "I"-shaped structure composed of a circular slider, a transition rod and a connecting block. The circular slider at the top thereof slides in cooperation with the groove, and a limiting ring is formed at the opening of the groove. The inner diameter of the limiting ring is not larger than the outer diameter of the transition rod. The connecting block is a cylindrical structure, and its top and one end are connected to the transition rod, and the other end is connected to the connecting rod.

[0008] A first compression spring connected to the top of the circular sliding block and the top of the groove is provided between the two; and a plurality of second compression springs are provided between the top of the connecting block and the bottom of the limiting ring.

[0009] The width of the sliding cavity gradually decreases from the middle phase to both ends, and the width in the middle is smaller than the outer diameter of the sliding rod.

[0010] The outer sleeve of the sliding rod is provided with a high damping buffer layer.

[0011] The arc-shaped stopper is fixed to the top of the pier by means of a stopper bolt.

[0012] The beneficial effects of the present invention are:

[0013] 1) The present invention can effectively limit the displacement of bridges of various sizes. When encountering a small earthquake, the displacement of the bridge is very small. At this time, the traditional earthquake-resistant blocks cannot limit it. The present invention has two devices that can effectively limit the tiny displacement of the bridge. The first and second compression springs in the Y-shaped iron rod convert the earthquake energy into the elastic potential energy of the springs and the high-damping energy-absorbing buffer pads of the arc-shaped blocks convert the tiny earthquake energy into heat, thereby protecting the bridge. When encountering a larger earthquake, the sliding rod indirectly connected to the bridge slides as a whole in the sliding cavity, and the high-damping buffer layer attached to the outside of the sliding rod and the high-damping energy-absorbing buffer pad in the inner cavity of the arc-shaped block rub to generate a large amount of heat, and the sliding rod and the high-damping material produce compression deformation to consume the earthquake energy, thereby protecting the bridge.

[0014] 2) The present invention can limit both the lateral displacement and the vertical displacement of the bridge through the erected arc-shaped stopper device.

[0015] 3) The present invention has a sliding energy dissipation device which not only limits the displacement of the bridge but also minimizes the damage to the bridge itself, thereby extending the service life of the device.

[0016] 4) The present invention has a certain reset function. When encountering a small earthquake, the device slides in a small arc in the sliding cavity. Due to the high damping energy-absorbing buffer pad around the sliding cavity, the sliding rod can return to its original position; at the same time, the built-in compression spring also has a reset function.

[0017] 5) The present invention is easy to install and replace. When the block device is irreparable, it can be replaced. It also has the advantage of simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a detailed schematic diagram of the structure of the present invention;

[0019] Figure 2 This is the overall installation diagram of the present invention;

[0020] Figure 3 The bridge installation location and working diagram of the present invention;

[0021] Figure 4 This is a front view of the arc-shaped stopper of the present invention;

[0022] Figure 5 The arc-shaped stopper of the present invention works under earthquake action. Figure 1 ;

[0023] Figure 6 The arc-shaped stopper of the present invention works under earthquake action. Figure 2 ;

[0024] Figure 7 It is a schematic diagram of the structure of the Y-shaped iron rod in the present invention.

[0025] In the figure: 1 arc-shaped stopper, 2 Y-shaped iron rod, 3 connecting rod, 4 sliding rod, 5 bridge pier, 6 main beam, 7 high damping energy absorption buffer pad, 8 sliding cavity, 9 high damping buffer layer, 10 stopper bolt, 21 sleeve, 22 telescopic rod, 23 groove, 24 circular slider, 25 transition rod, 26 connecting block, 27 limiting ring, 28 first compression spring, 29 second compression spring. DETAILED DESCRIPTION

[0026] The present invention is further described below:

[0027] See also Figure 1-7 ,

[0028] The present invention discloses a simple bridge seismic stop block device with high damping, sliding energy dissipation and limiting function, comprising an arc-shaped stop block 1, a Y-shaped iron rod 2, a connecting rod 3 and a sliding rod 4. The arc-shaped stop block 1 is an arc-shaped hollow structure, the bottom of which is fixed to the top of the pier 5, and the front and rear side walls are arc-shaped limiting plates protruding away from the main beam 6. The inner cavity is filled with a high damping, energy dissipation buffer pad 7, and the high damping, energy dissipation buffer pad 7 is formed with a sliding cavity 8 along the vertical direction for sliding one end of the sliding rod 4, and the other end of the sliding rod 4 is connected to the Y-shaped iron rod 2 by the connecting rod 3; the top end of the Y-shaped iron rod 2 is hinged to the side wall of the main beam 6.

[0029] The Y-shaped iron rod 2 includes a sleeve 21 and a telescopic rod 22. The top end of the sleeve 21 is hinged to the side wall of the main beam 6, and the bottom end thereof is axially formed with a groove 23 for fitting onto the top end of the telescopic rod 22. The telescopic rod 22 is an "I"-shaped structure composed of a circular slider 24, a transition rod 25 and a connecting block 26. The circular slider 24 at the top thereof slides in cooperation with the groove 23, and a limiting ring 27 is formed at the opening of the groove 23. The inner diameter of the limiting ring 27 is not greater than the outer diameter of the transition rod 25. The connecting block 26 is a cylindrical structure, and its top and one end are connected to the transition rod 25, and the other end is connected to the connecting rod 3.

[0030] A first compression spring 28 is provided between the top of the circular slider 24 and the top of the groove 23 to connect the two. A plurality of second compression springs 29 are provided between the top of the connecting block 26 and the bottom of the limiting ring 26 .

[0031] The width of the sliding cavity 8 gradually decreases from the middle to the two ends, and the width in the middle is smaller than the outer diameter of the sliding rod 4 .

[0032] The sliding rod 4 is externally covered with a high damping buffer layer 9 .

[0033] The arc-shaped stopper 1 is fixed to the top of the pier 5 by a stopper bolt 10 .

[0034] Working principle: When a small earthquake occurs, the main beam 6 and the bridge pier 5 slide relative to each other, and the first and second compression springs in the Y-shaped iron rod 2 are deformed to consume part of the earthquake energy; when the first and second compression springs are deformed, the length of the Y-shaped iron rod 2 changes, and the sliding rod 4 can slide at this time, generating high energy to offset the remaining earthquake energy. When a larger earthquake occurs, when the main beam 6 and the bridge pier 5 slide more, the sliding rod 4 will slide to the bottom or top of the arc block 1 and cannot continue to slide, and continue to limit the displacement of the beam to prevent the overturning of the bridge. Since the arc block 1 is an upright arc structure, while limiting the lateral displacement of the bridge, it can also limit the vertical displacement of the bridge, which can better protect the bridge. Since the first and second compression springs and the high damping energy-consuming buffer pad 7 have a certain reset function, the block has a certain reset function. Since the anti-seismic block device is spliced ​​from multiple parts, it is easy to install and replace.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A high damping sliding energy dissipation limit simple bridge seismic stopper device, characterized by: The invention comprises an arc-shaped stopper (1), a Y-shaped iron rod (2), a connecting rod (3) and a sliding rod (4); the arc-shaped stopper (1) is an arc-shaped hollow structure, the bottom of which is fixed to the top of the pier (5); the front side wall and the rear side wall of the arc-shaped stopper are arc-shaped limit plates protruding in a direction away from the main beam (6); the inner cavity of the arc-shaped stopper (1) is filled with a high-damping energy-absorbing buffer pad (7); the high-damping energy-absorbing buffer pad (7) is formed with a sliding cavity (8) for sliding one end of the sliding rod (4) along the vertical direction; the other end of the sliding rod (4) is connected to the Y-shaped iron rod (2) through the connecting rod (3); the top end of the Y-shaped iron rod (2) is hinged to the side wall of the main beam (6); the Y-shaped iron rod (2) comprises a sleeve (21) and a telescopic rod (22); the top of the sleeve (21) is The end is hinged to the side wall of the main beam (6), and the bottom end thereof is axially formed with a groove (23) for fitting the top end of the telescopic rod (22). The telescopic rod (22) is an "I"-shaped structure composed of a circular slider (24), a transition rod (25) and a connecting block (26). The circular slider (24) at the top thereof slides in cooperation with the groove (23). A limiting ring (27) is formed at the opening of the groove (23). The inner diameter of the limiting ring (27) is not greater than the outer diameter of the transition rod (25). The connecting block (26) is a cylindrical structure, the top and one end of which are connected to the transition rod (25), and the other end is connected to the connecting rod (3). The width of the sliding cavity (8) gradually decreases from the middle to the two ends, and the width in the middle is smaller than the outer diameter of the sliding rod (4).

2. According to claim 1, a high damping sliding energy dissipation limiting simple bridge anti-seismic stopper device is characterized by: A first compression spring (28) is provided between the top of the circular slider (24) and the top of the groove (23) and connected to the two; and a plurality of second compression springs (29) are provided between the top of the connecting block (26) and the bottom of the limiting ring (27).

3. According to claim 1, a high damping sliding energy dissipation limiting simple bridge anti-seismic stopper device is characterized by: The exterior of the sliding rod (4) is provided with a high damping buffer layer (9).

4. According to claim 1, a high damping sliding energy dissipation limiting simple bridge anti-seismic block device is characterized by: The arc-shaped stopper (1) is fixed to the top of the pier (5) via a stopper bolt (10).

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