Shock absorption and isolation device for bridge

Abstract

The utility model belongs to the technical field of seismic mitigation and isolation devices, and discloses a bridge seismic mitigation and isolation device. The support is mainly technically characterized by comprising an upper support plate, a spherical sliding plate, a spherical crown lining plate, a plane sliding plate and a lower support plate, the length of the lower support plate is larger than that of the upper support plate, an energy consumption rod is arranged on the portion, on the outer side of the upper support plate, of the lower support plate, a sleeve is arranged on the outer side of the upper portion of the energy consumption rod, and the sleeve is sleeved with the spherical sliding plate. A force transmission disc with a through hole in the center is arranged in the sleeve, and the outer diameter of the force transmission disc is equal to or slightly smaller than the inner diameter of the sleeve. During installation, the sleeve is embedded in a beam body, the upper support plate is fixed to the beam body, the lower support plate is fixed to a bridge pier, after an earthquake or other transverse shear force occurs, the energy consumption rods are stressed to generate elastic deformation, the better earthquake reduction and isolation effect is achieved, the energy consumption rods are large in length and diameter and large in swing amplitude, the upper support plate is small in area and light in weight, and the energy consumption rods are not prone to deformation. Not only is the cost of the seismic mitigation and isolation device reduced, but also construction is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration reduction and isolation devices, in particular to a bridge vibration reduction and isolation device. Background Art

[0002] Bridge seismic isolation devices play a vital role in the safety and service life of bridges. The bridge seismic isolation devices currently used mainly include the following two types: one, including a support body, the support body includes an upper support plate, a spherical slide plate, a spherical crown lining plate, a flat slide plate and a lower support plate, and the purpose of shock absorption is achieved by changing the relative positions of the upper support plate, the spherical crown lining plate and the lower support plate of the support body; the other, including a support body, the support body includes an upper support plate, a spherical slide plate, a spherical crown lining plate, a flat slide plate and a lower support plate, and an anti-shear link is connected between the upper support plate and the lower support plate. When an earthquake occurs, when the lateral shear force is small, the anti-shear strength of the anti-shear link is used to achieve the anti-shear strength. When the lateral shear force increases, the anti-shear link is broken to dissipate energy. For bridges with small spans, the above-mentioned two types of bridge seismic isolation devices have relatively good seismic isolation effects due to the small relative displacement of the beam body. However, for suspension bridges with large spans, they have the following defects: First, since the overall area of ​​the upper support plate and the lower support plate are large, not only the manufacturing cost is high, but also the weight is large and the construction is difficult; second, due to the space limitations of the beam body and the support body, the height and diameter of the shear link are subject to certain restrictions. Usually, the shear link is short and thin, the swing amplitude is small, the energy consumption effect is poor, and thus the seismic isolation effect is poor; third, the shear link is located between the upper support plate and the lower support plate, which makes installation and replacement more inconvenient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a bridge seismic isolation device with large swing amplitude, good seismic isolation effect, light weight, easy construction, low cost, and more convenient installation and replacement.

[0004] In order to solve the above problems, the technical solution adopted by the bridge seismic isolation device of the present invention is: it includes a support body, the support body includes an upper support plate, a spherical skateboard, a spherical crown lining, a flat skateboard and a lower support plate, and is characterized in that: the length of the lower support plate is greater than the length of the upper support plate, an energy-absorbing rod is arranged on the lower support plate outside the upper support plate, a sleeve is arranged on the outside above the energy-absorbing rod, and a force transmission disk with a through hole in the center is arranged in the sleeve, and the outer diameter of the force transmission disk is equal to or slightly smaller than the inner diameter of the sleeve.

[0005] Its additional technical features are:

[0006] An upper anchor rod is provided above the upper support plate, and a lower anchor rod is provided below the lower support plate;

[0007] A limiting ring is provided on the inner wall of the sleeve, and the force transmission disc is located above the limiting ring;

[0008] A sealing cover with a lifting ring on the upper surface is provided above the force transmission disc;

[0009] An end cover is provided on the top end of the sleeve.

[0010] Compared with the prior art, the bridge seismic isolation device provided by the present invention has the following advantages: First, since it includes a support body, the support body includes an upper support plate, a spherical slide plate, a spherical crown lining plate, a flat slide plate and a lower support plate, the length of the lower support plate is greater than the length of the upper support plate, an energy-absorbing rod is arranged on the lower support plate outside the upper support plate, a sleeve is arranged on the outside above the energy-absorbing rod, a force transmission disk with a through hole in the center is arranged in the sleeve, the outer diameter of the force transmission disk is equal to or slightly smaller than the inner diameter of the sleeve, and the lower support plate is provided with an energy-absorbing rod. During installation, the sleeve is embedded in the beam body, and the upper part of the sleeve is flush with the beam body. The upper support plate is fixed to the beam body, and the lower support plate is fixed to the pier. After an earthquake or other lateral shear force occurs, the beam body transmits the force to the energy-absorbing rod through the sleeve and the force transmission plate. The energy-absorbing rod undergoes elastic-plastic deformation after being subjected to the force, which plays a better shock-absorbing and isolating effect. Because the energy-absorbing rod extends into the beam body, the length of the energy-absorbing rod can be designed to be longer as needed, and the diameter of the energy-absorbing rod is large, the swing amplitude is large, the upper support plate area is small, and the weight is light, which not only reduces the cost of the shock-absorbing and isolating device, but also It is also convenient for construction. When longitudinal force occurs, the energy-absorbing rod can move up and down in the sleeve, thus avoiding damage to the support. Secondly, since an upper anchor rod is provided above the upper support plate and a lower anchor rod is provided below the lower support plate, during construction, the upper anchor rod is cast together with the beam body, and the lower anchor rod is cast together with the pier. The connection between the upper support plate and the beam body, as well as the lower support plate and the pier is more firmly established, thus avoiding lateral relative movement between the upper support plate and the beam body, as well as between the lower support plate and the pier when lateral shear force occurs. Thirdly, since the upper support plate and the beam body, as well as the lower support plate and the pier are formed on the inner wall of the sleeve With a limiting ring, the force transmission disc is located above the limiting ring, which makes the force transmission disc more stable and has a good shock-isolating effect; fourthly, since a cover with a lifting ring on the upper surface is provided above the force transmission disc, it not only prevents dust or sewage from entering between the force transmission disc and the energy-absorbing rod, but also allows the force transmission disc to be easily taken out, making it more convenient to use; fifthly, since an end cover is provided at the top of the sleeve, the end cover is covered after the installation is completed, which prevents sewage and dust from falling into the sleeve. When inspecting or replacing the energy-absorbing rod, the end cover can be opened, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the bridge seismic isolation device of the utility model;

[0012] Figure 2 This is a top view of the bridge seismic isolation device;

[0013] Figure 3 Schematic diagram of the structure of the sleeve;

[0014] Figure 4 This is a diagram showing the usage status of the bridge seismic isolation device. DETAILED DESCRIPTION

[0015] The structure and operating principle of the bridge seismic isolation device of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] like Figure 1 、 Figure 2 and Figure 3 As shown, a schematic structural diagram of the utility model bridge seismic isolation device, the utility model bridge seismic isolation device includes a support body 1, the support body 1 includes an upper support plate 2, a spherical skateboard 3, a spherical crown lining plate 4, a flat skateboard 5 and a lower support plate 6, the length of the lower support plate 6 is greater than the length of the upper support plate 2, an energy-absorbing rod 7 is arranged on the lower support plate 6 outside the upper support plate 2, a sleeve 8 is arranged on the outside above the energy-absorbing rod 7, a force transmission disk 10 with a through hole 9 in the center is arranged in the sleeve 8, and the outer diameter of the force transmission disk 10 is equal to or slightly smaller than the inner diameter of the sleeve 8.

[0017] like Figure 4 As shown, during installation, the sleeve 8 is embedded in the beam body 11, and the upper part of the sleeve 8 is flush with the beam body 11. The upper support plate 2 is fixed to the beam body 11, and the lower support plate 6 is fixed to the pier 12. After an earthquake or other lateral shear force occurs, the beam body 11 transmits the force to the energy-absorbing rod 7 through the sleeve 8 and the force transmission plate 10. The energy-absorbing rod 7 undergoes elastic deformation after being subjected to the force, which has a better shock-absorbing and isolation effect. Because the energy-absorbing rod 7 extends into the beam body 11, the length of the energy-absorbing rod 7 can be designed to be longer as needed, and the diameter of the energy-absorbing rod is large, the swing amplitude is large, the upper support plate 2 is small in area and light in weight, which not only reduces the cost of the shock-absorbing and isolation device, but also facilitates construction. When a longitudinal force occurs, the energy-absorbing rod 7 can move up and down in the sleeve to avoid damage to the support.

[0018] An upper anchor rod 13 is provided above the upper support plate 2, and a lower anchor rod 14 is provided below the lower support plate 6. During construction, the upper anchor rod 13 is cast together with the beam body 11, and the lower anchor rod 14 is cast together with the pier 12. The connection between the upper support plate and the beam body, as well as the lower support plate and the pier is more firmly connected, avoiding lateral relative movement between the upper support plate and the beam body, as well as between the lower support plate and the pier when lateral shear force occurs.

[0019] A limiting ring 15 is provided on the inner wall of the sleeve 8 , and the force transmission disc 10 is located above the limiting ring 15 , which makes the force transmission disc more stable and has a good vibration reduction and isolation effect.

[0020] A cover 17 with a lifting ring 16 on the upper surface is provided above the force transmission disc 10, which not only prevents dust or sewage from entering between the force transmission disc and the energy dissipation rod, but also allows the force transmission disc to be easily removed, making it more convenient to use.

[0021] An end cover 18 is provided at the top of the sleeve 8. After installation, the end cover is closed to prevent sewage and dust from falling into the sleeve. When inspecting or replacing the energy-consuming rod, the end cover can be opened, which is more convenient to use.

[0022] The protection scope of the present invention is not limited to the above embodiments. As long as the structure is the same as or similar to the structure of the bridge seismic isolation device of the present invention, it falls within the protection scope of the present invention.

Claims

1. A bridge seismic isolation device, comprising a support body, wherein the support body comprises an upper support plate, a spherical slide plate, a spherical cap lining plate, a flat slide plate, and a lower support plate, characterized in that: The length of the lower support plate is greater than that of the upper support plate. An energy-absorbing rod is arranged on the lower support plate outside the upper support plate. A sleeve is arranged on the outside above the energy-absorbing rod. A force transmission plate with a through hole in the center is arranged in the sleeve. The outer diameter of the force transmission plate is equal to or slightly smaller than the inner diameter of the sleeve.

2. The bridge seismic isolation device according to claim 1, characterized in that: An upper anchor rod is provided above the upper support plate, and a lower anchor rod is provided below the lower support plate.

3. The bridge seismic isolation device according to claim 1, characterized in that: A limiting ring is provided on the inner wall of the sleeve, and the force transmission disc is located above the limiting ring.

4. The bridge seismic isolation device according to claim 1, characterized in that: A sealing cover with a lifting ring on the upper surface is arranged above the force transmission disc.

5. The bridge seismic isolation device according to claim 1, characterized in that: An end cover is provided on the top end of the sleeve.

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