Bridge anti-seismic toughness device and adjusting method

Abstract

The invention provides a bridge anti-seismic toughness device which comprises a first base, a second base and a first anti-seismic mechanism, the first base and the second base are arranged at intervals, and the first anti-seismic mechanism comprises a box body connected with the first base and a connecting plate transversely arranged in the box body. The first anti-seismic mechanism is arranged in the box body, the connecting plate is arranged on the first anti-seismic mechanism, the anti-seismic piece is arranged in the box body and generates sliding friction with the connecting plate, the second anti-seismic mechanism is matched with the first anti-seismic mechanism and comprises a pair of steel damping pairs symmetrically arranged on the two sides of the box body, and the steel damping pairs are connected with the second base.

Description

Technical Field

[0001] The invention relates to the field of bridge bearings, and in particular to a bridge seismic toughness device and an adjustment method. Background Art

[0002] At present, with the continuous increase of transportation facilities in my country, the seismic performance of bridge shock-absorbing devices in earthquakes has always been the focus of research. The 6.9-magnitude earthquake that occurred in Menyuan County in early 2022 caused a beam fall problem, which affected the post-earthquake operation function of the Lanzhou-Xinjiang Railway for up to 9 months. It can be seen that once the bridge structure is severely damaged by the earthquake, the line traffic will be interrupted, which will pose a serious threat to the safety of people's lives and property.

[0003] Therefore, how to enhance the rapid recovery of bridge facilities after earthquakes and improve the toughness of bridge structures is an important direction to solve this problem. Currently, existing bridge seismic devices are basically developed based on a certain set working condition and lack effective multi-level protection devices.

[0004] CN118441553A provides a self-resetting bridge pier anti-seismic structure and a construction method thereof, comprising an upper segment of a bridge pier, prestressed tendons, a steel casing, an upper toothed swing joint, a foundation, an annular damper, a limit duckbill, a limit duckbill hole, an upper rigid chimeric joint, a lower rigid chimeric joint and a lower segment of a bridge pier; the upper segment of the bridge pier is a square column; the lower end surface of the upper segment of the bridge pier is provided with an upper toothed swing joint; the lower segment of the bridge pier is a square column; the upper end surface of the lower segment of the bridge pier is provided with a lower toothed swing joint; the upper toothed swing joint and the lower toothed swing joint are meshed with each other; the steel casing is a square sleeve; the steel casing is sleeved on the outer side of the lower segment of the bridge pier; the lower part of the upper segment of the bridge pier is located in the steel casing. Although the device can play a certain anti-seismic function, it does not have a multi-level protection limit measure.

[0005] Therefore, it is desired in the art to provide a bridge seismic toughness device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a bridge seismic resilience device, which can take different levels of protective measures according to different earthquake situations.

[0007] According to a first aspect of the present invention, there is provided a bridge seismic toughness device, comprising a first base and a second base arranged at intervals,

[0008] a first anti-seismic mechanism, the first anti-seismic mechanism comprising a box body connected to the first base, a connecting plate arranged in the box body in a transverse direction, and an anti-seismic member arranged in the box body and generating sliding friction with the connecting plate, and

[0009] A second anti-seismic mechanism adapted to the first anti-seismic mechanism, wherein the second anti-seismic mechanism comprises a pair of steel damping pairs symmetrically arranged on both sides of the box body, and the steel damping pairs are connected to the second base.

[0010] In one embodiment, the box body includes a main body portion configured as a U-shaped structure, and a fixing portion extending outward from the main body portion and rotatably connected to the first base through a connecting shaft, wherein the anti-vibration component is fixed to an inner wall of the main body portion.

[0011] In one embodiment, the anti-vibration component is constructed of any one of a rubber elastomer and a polyurethane elastomer.

[0012] In one embodiment, the steel damping pair is configured as an arc-shaped structure.

[0013] In one embodiment, a limiting plate is provided between the main body and the steel damping pair.

[0014] In one embodiment, the second anti-seismic mechanism also includes a first pin shaft extending sequentially through the first connecting end of the steel damping pair, the limiting plate, the box body and the connecting plate, and a second pin shaft extending sequentially through the second connecting end of the steel damping pair, the limiting plate and the second base.

[0015] In one embodiment, a first limiting groove for limiting the movement path of the anti-vibration component is provided on the main body.

[0016] The first base is configured to drive the box to move laterally under the action of an external force, thereby performing shearing movement with the anti-vibration component through the connecting plate until the first pin abuts against the side wall of the first limiting groove.

[0017] In one embodiment, a second limiting groove for limiting the deformation displacement of the steel damping pair is provided on the limiting plate.

[0018] The steel damping pair is configured to be deformable under the joint action of the first base and the box body until the second pin abuts against the side wall of the second limiting groove.

[0019] In one embodiment, the first base is connected to a bridge beam, and the second base is connected to a pier anchor system.

[0020] According to a second aspect of the present invention, there is provided an adjustment method, which utilizes the bridge seismic resilience device as described above, and comprises the following contents:

[0021] S1. The first base drives the box to move horizontally under the action of external force, so that the anti-vibration component performs shearing movement through the connecting plate;

[0022] S2, until the first pin abuts against the side wall of the first limiting groove, the steel damping pair is deformed under the joint action of the first base and the box body, until the second pin abuts against the side wall of the second limiting groove.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] First, the present invention can take different levels of protective measures for different earthquake situations. Specifically, in the case of small and medium earthquakes, the anti-seismic parts and the connecting plates can perform shearing movements to generate energy dissipation and buffering effects, and provide restoring force for the bridge to ensure the safety of bridge construction; in the case of large earthquakes, the steel damping pair can be deformed to play a role of buffering and large earthquake energy dissipation; in the case of extreme displacement, the second pin shaft can be abutted against the side wall of the second limiting groove of the limiting plate, thereby playing a good limiting role to achieve the function of preventing the beam from falling, so as to further ensure the safety of the beam frame engineering equipment.

[0025] Secondly, the present invention is mainly used in highways, railways, and urban roads, so as to effectively reduce the impact of earthquakes on bridge facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0027] Figure 1 The structure of the bridge seismic toughness device according to the present invention is schematically shown;

[0028] Figure 2 A partial cross-sectional view of the bridge seismic toughness device according to the present invention;

[0029] Figure 3 It is a top view of the bridge seismic toughness device according to the present invention.

[0030] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0032] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0033] In the present invention, unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0034] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 The structure of the bridge seismic toughness device 100 according to the present invention is schematically shown;

[0037] Figure 2 A partial cross-sectional view of a bridge seismic resilience device 100 according to the present invention;

[0038] Figure 3 FIG. 1 is a top view of the bridge seismic toughness device 100 according to the present invention.

[0039] like Figures 1 to 3 As shown, according to the first aspect of the present invention, a bridge seismic resilience device 100 is provided, which mainly includes a first base 11 and a first seismic resistance mechanism arranged at intervals, wherein the first seismic resistance mechanism includes a box body 21 connected to the first base body 11, a connecting plate 22 arranged in the box body 21 in the transverse direction, and a seismic resistance member 23 arranged in the box body 21. Preferably, in an earthquake and when the bridge seismic resilience device 100 is displaced, the seismic resistance member 23 can generate sliding friction (i.e., perform shearing motion) with the connecting plate 22 to facilitate subsequent protection work.

[0040] In one embodiment, Figures 1-2 As shown, the box body 21 includes a main body 211 and a fixing portion 212 extending outward from the main body 211. Preferably, the main body 211 is rotatably connected to the first base 11 via a connecting shaft 213, thereby improving the flexibility and maneuverability between the first base 11 and the box body 21.

[0041] Preferably, the main body 211 is configured as a U-shaped structure. In the present invention, there are two anti-seismic components 23, and the two anti-seismic components 23 are respectively fixed on the inner walls of both sides of the main body 211. Preferably, one end of the anti-seismic component 23 away from the main body 211 is tightly fitted with the connecting plate 22, so that when the bridge anti-seismic toughness device 100 is displaced, the anti-seismic component 23 can perform shearing motion with the connecting plate 22 to generate energy dissipation and buffering effects, thereby successfully completing the first-level protection work.

[0042] In the present invention, the anti-seismic component 23 is constructed as any one of a rubber elastic body and a polyurethane elastic body. Therefore, the anti-seismic component 23 can provide a certain restoring force for the bridge anti-seismic toughness device 100, that is, during the primary protection work, after the displacement caused by the earthquake energy is completely offset, the anti-seismic component 23 itself can provide effective restoring force for the bridge to ensure the safety of the bridge construction through its own structural characteristics.

[0043] According to the present invention, the bridge seismic toughness device 100 further includes a second seismic resistance mechanism adapted to the first seismic resistance mechanism. Figures 1-2 As shown, preferably, the second anti-seismic mechanism includes a pair of steel damping pairs 31 symmetrically arranged on both sides of the box body 21, and a limit plate 32 arranged between the main body 211 and the steel damping pair 31. Preferably, a through hole is provided on the limit plate 32 to allow the first pin shaft 301 (described below) to pass through.

[0044] In the present invention, if Figures 1-2 As shown, a first limiting groove (not shown) for limiting the movement path of the anti-vibration component 23 is provided on the main body 211, and a second limiting groove 321 for limiting the deformation displacement of the steel damping pair 31 is provided on the limiting plate 32, and its contents are specifically introduced below.

[0045] In one embodiment of the present invention, Figures 1-2 As shown, a first connection end 311 and a second connection end 312 are respectively provided at the ends of the steel damping pair 31. In addition, the second anti-seismic mechanism further includes a first pin 301 and a second pin 302 extending through the first connection end 311 and the second connection end 312, respectively.

[0046] In one embodiment, the first pin 301 can sequentially extend through the first connection end 311 of the steel damping pair 31, the limiting plate 32, the first limiting groove of the main body 211 and the connecting plate 32. Therefore, during a small or medium earthquake, the first base 11 can drive the box body 21 to move laterally under the action of an external force, thereby performing a shearing motion with the anti-seismic member 23 through the connecting plate 22 to generate energy dissipation and buffering effects, further completing the primary protection work of the device.

[0047] At the same time, since the first limiting groove of the main body 211 is a long hole structure, the first limiting groove can provide a certain displacement for the anti-vibration member 23 until the first pin 301 abuts against the side wall of the first limiting groove. In addition, due to the structural characteristics of the anti-vibration member 23 itself, an effective restoring force is provided for the bridge to ensure the safety of the bridge construction.

[0048] In one embodiment, the second pin 302 can extend through the second connection end 312 of the steel damping pair 31 and the second limiting groove 321 of the limiting plate 32 in sequence to be fixedly connected with the second base 12. Therefore, during a large earthquake (after the first-level protection work is completed), the shear movement of the seismic component 23 at this time reaches the limit position, that is, the first pin 301 abuts against the side wall of the first limiting groove. Thereafter, the steel damping pair 31 can be deformed (i.e., tensile or compressive plastic deformation) under the joint action of the first base 11 and the box body 21 to achieve buffering and energy dissipation, thereby completing the second-level protection work of the device.

[0049] In one embodiment, when the steel damping pair 31 is further displaced until reaching the displacement limit (after the second level protection work is completed), the second pin 302 is now in contact with the side wall of the second limit groove 321, thereby completing the third level protection work of the device. Preferably, the third level protection work can consolidate the entire device, thereby playing the role of preventing the beam from falling.

[0050] In one embodiment, the first base 11 is connected to the bridge beam, and the second base 12 is connected to the pier anchor system. Therefore, the bridge seismic toughness device 100 can provide the bridge with the effects of automatic reset, buffering and energy dissipation, and beam drop prevention during an earthquake, and ensure the safety of bridge engineering facilities through three levels of protection.

[0051] The following specifically introduces three levels of protection measures in the present invention:

[0052] First, primary protection measures are most commonly used in small and medium-sized earthquakes.

[0053] During an earthquake, the first base 11 can drive the box body 21 to move laterally under the action of external force (seismic energy), thereby performing shear movement with the seismic anti-part 23 through the connecting plate 22 to produce energy dissipation and buffering effects, and can self-reset through the seismic anti-part 23, thereby completing the first-level protection work of the device.

[0054] Preferably, the limit displacement of the anti-seismic element 23 is when the first pin 301 is in contact with the side wall of the first limit groove. Under this level of protection, after the displacement caused by the earthquake energy is completely offset, the anti-seismic element 23 can provide effective restoring force for the bridge through its own structural characteristics, thereby ensuring the safety of bridge construction.

[0055] Secondly, secondary protection measures mainly occur in large earthquakes.

[0056] At this time, the primary protection measures lose their effect, and the anti-vibration member 23 moves to the limit displacement, that is, the first pin 301 abuts against the side wall of the first limit groove. After that, the steel damping pair 31 can be deformed (i.e., tensile or compressive plastic deformation) under the joint pulling action of the first base 11 and the box body 21, thereby achieving the effect of buffering and dissipating earthquake energy, thereby completing the secondary protection work of the device.

[0057] Finally, the tertiary protection measures occur in further earthquake damage displacements after the secondary protection measures.

[0058] At this time, the steel damping pair 31 reaches the limit displacement, that is, the second pin shaft 302 abuts against the side wall of the second limit groove 321, so the displacement of the steel damping pair 31 is limited by the limit plate 32, so that the entire device is consolidated, thereby playing a role in preventing the beam from falling, and further ensuring the safety of the bridge engineering facilities.

[0059] According to a second aspect of the present invention, there is provided an adjustment method, which utilizes the bridge seismic resilience device as described above, and comprises the following contents:

[0060] First, under the action of an earthquake, the first base 11 drives the box body 21 to move horizontally, thereby performing shearing movement with the anti-seismic component 23 through the connecting plate 22 to produce energy dissipation and buffering effects, and can self-reset through the anti-seismic component 23, thereby completing the first-level protection work of the device.

[0061] Then, when the first pin shaft 301 abuts against the side wall of the first limiting groove, the steel damping pair 31 will be deformed under the joint action of the first base 11 and the box body 21, thereby further achieving the effect of buffering and dissipating seismic energy, thereby completing the secondary protection work of the device.

[0062] Finally, when the second pin shaft 302 abuts against the side wall of the second limiting groove 321, the limiting plate 32 can be used to limit the displacement of the steel damping pair 31, so that the entire device is consolidated to prevent the beam from falling, thereby ensuring the safety of the bridge engineering facility.

[0063] Compared with the prior art, the advantages of the present invention are:

[0064] First, the present invention can take different levels of protective measures for different earthquake situations. Specifically, in the case of small and medium earthquakes, the anti-seismic component 23 and the connecting plate 22 can perform shearing motion to generate energy dissipation and buffering effects, and provide restoring force for the bridge to ensure the safety of bridge construction; in the case of large earthquakes, the steel damping pair 31 can be deformed to play a role of buffering and large earthquake energy dissipation; in the case of extreme displacement, the second pin shaft 302 can be abutted against the side wall of the second limiting groove 321 of the limiting plate 32, thereby playing a good limiting role to achieve the function of preventing the beam from falling, so as to further ensure the safety of the beam frame engineering equipment.

[0065] Secondly, the present invention is mainly used in highways, railways, and urban roads, so as to effectively reduce the impact of earthquakes on bridge facilities.

[0066] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bridge seismic toughness device, comprising: A first base (11) and a second base (12) are arranged at intervals, a first anti-vibration mechanism, the first anti-vibration mechanism comprising a box body (21) connected to the first base (11), a connecting plate (22) arranged in the box body (21) in a transverse direction, and an anti-vibration member (23) arranged in the box body (21) and generating sliding friction with the connecting plate (22); and A second anti-seismic mechanism adapted to the first anti-seismic mechanism, the second anti-seismic mechanism comprising a pair of steel damping pairs (31) symmetrically arranged on both sides of the box body (21), the steel damping pairs (31) being connected to the second base (12).

2. The bridge seismic toughness device according to claim 1, characterized in that: The box body (21) comprises a main body (211) configured as a U-shaped structure, and a fixing portion (212) extending outward from the main body (211) and rotatably connected to the first base (11) via a connecting shaft (213), wherein the anti-vibration component (23) is fixed to the inner wall of the main body (211).

3. The bridge seismic toughness device according to claim 2, characterized in that: The anti-vibration component (23) is constructed of any one of a rubber elastic body and a polyurethane elastic body.

4. The bridge seismic toughness device according to claim 3, characterized in that: The steel damping pair (31) is constructed as an arc-shaped structure.

5. The bridge seismic toughness device according to claim 4, characterized in that: A limiting plate (32) is provided between the main body (211) and the steel damping pair (31).

6. The bridge seismic toughness device according to claim 5, characterized in that: The second anti-seismic mechanism also includes a first pin shaft (301) extending sequentially through the first connecting end (311) of the steel damping pair (31), the limiting plate (32), the box body (21) and the connecting plate (22), and a second pin shaft (302) extending sequentially through the second connecting end (312) of the steel damping pair (31), the limiting plate (32) and the second base (12).

7. The bridge seismic toughness device according to claim 6, characterized in that: A first limiting groove for limiting the movement path of the anti-vibration component (23) is provided on the main body (211). The first base (11) is configured to be able to drive the box body (21) to move laterally under the action of an external force, thereby performing shearing movement with the anti-vibration component (23) through the connecting plate (22) until the first pin shaft (301) abuts against the side wall of the first limiting groove.

8. The bridge seismic toughness device according to claim 6 or 7, characterized in that: A second limiting groove (321) for limiting the deformation displacement of the steel damping pair (31) is provided on the limiting plate (32). The steel damping pair (31) is configured to be deformable under the combined action of the first base (11) and the box body (21) until the second pin shaft (302) abuts against the side wall of the second limiting groove (321).

9. The bridge seismic toughness device according to any one of claims 1 to 7, characterized in that: The first base (11) is connected to the bridge beam, and the second base (12) is connected to the pier anchor system.

10. A method of adjustment, which utilizes the bridge seismic resilience device according to any one of claims 1 to 9, comprising the following contents: S1. The first base (11) drives the box (21) to perform lateral movement under the action of an external force, thereby causing the anti-vibration component (23) to perform shearing movement through the connecting plate (22); S2, until the first pin shaft (301) abuts against the side wall of the first limiting groove, the steel damping pair (31) is deformed under the joint action of the first base (11) and the box body (21) until the second pin shaft (302) abuts against the side wall of the second limiting groove (321).

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