Bridge seismic toughness devices and adjustment methods

Abstract

The present invention provides a bridge seismic resilience device, comprising a first base and a second base arranged at intervals, a first seismic mechanism, the first seismic mechanism comprising a box connected to the first base, a connecting plate arranged laterally in the box, and a seismic member disposed in the box and generating sliding friction with the connecting plate, and a second seismic mechanism adapted to the first seismic mechanism, the second seismic mechanism comprising a pair of steel damping pairs symmetrically arranged on both sides of the box, the steel damping pairs being connected to the second base.

Description

Technical Field

[0001] This invention relates to the field of bridge bearings, and more specifically to a bridge seismic toughness device and an adjustment method. Background Technology

[0002] Currently, with the continuous expansion of transportation infrastructure in my country, the seismic performance of bridge damping devices during earthquakes has been a key research focus. The 6.9 magnitude earthquake that occurred in Menyuan County in early 2022 resulted in bridge beam collapse, impacting the post-earthquake operation of the Lanzhou-Xinjiang Railway for up to nine months. This demonstrates that severe seismic damage to bridge structures leading to railway line disruptions poses a serious threat to the safety of people's lives and property.

[0003] Therefore, enhancing the rapid recovery of bridge facilities after an earthquake and improving the structural toughness of bridges are important directions for solving this problem. Currently, existing bridge seismic devices are basically developed based on a certain set working condition, and there is a lack of effective multi-level protection devices.

[0004] CN118441553A discloses a self-resetting bridge pier seismic-resistant structure and its construction method, including an upper pier segment, prestressed tendons, a steel casing, an upper toothed swing joint, a foundation, an annular damper, a limiting duckbill, a limiting duckbill hole, an upper rigid interlocking joint, a lower rigid interlocking joint, and a lower pier segment. The upper pier segment is a square column; an upper toothed swing joint is provided on the lower end face of the upper pier segment; the lower pier segment is a square column; a lower toothed swing joint is provided on the upper end face of the lower pier segment; the upper and lower toothed swing joints interlock; the steel casing is a square sleeve; the steel casing is fitted on the outside of the lower pier segment; the lower part of the upper pier segment is located inside the steel casing. Although this device can provide a certain seismic resistance, it lacks multi-level protective limiting measures.

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

[0006] The purpose of this invention is to provide a bridge seismic toughness device that can provide different levels of protection for different earthquake conditions.

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

[0008] The first seismic-resistant mechanism includes a housing connected to the first base, a connecting plate arranged laterally within the housing, and a seismic-resistant component disposed within the housing and subject to sliding friction with the connecting plate.

[0009] A second seismic-resistant mechanism adapted to the first seismic-resistant mechanism, the second seismic-resistant mechanism including a pair of steel damping pairs symmetrically arranged on both sides of the box body, the steel damping pairs being connected to the second base.

[0010] In one embodiment, the housing includes a main body configured in a U-shape and a fixing part extending outward from the main body and rotatably connected to the first base via a connecting shaft, wherein the shock-absorbing member is fixed to the inner wall of the main body.

[0011] In one embodiment, the shock absorber is constructed of either a rubber elastomer or a polyurethane elastomer.

[0012] In one embodiment, the steel damping pair is constructed 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 seismic mechanism further includes a first pin extending sequentially through the first connecting end of the steel damping pair, the limiting plate, the housing, and the connecting plate, and a second pin 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 is provided on the main body to restrict the movement path of the shock-absorbing component.

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

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

[0018] The steel damping pair is configured to deform under the combined action of the first base and the housing until the second pin abuts against the side wall of the second limiting groove.

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

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

[0021] S1. Under the action of external force, the first base drives the box to move laterally, thereby causing the shock-absorbing component to perform shearing motion through the connecting plate;

[0022] S2, until the first pin abuts against the side wall of the first limiting groove, the steel damping pair deforms under the combined action of the first base and the housing, 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 as follows:

[0024] Firstly, this invention can provide different levels of protection for different earthquake conditions. Specifically, during minor and moderate earthquakes, the shearing motion between the seismic components and the connecting plates generates energy dissipation and buffering effects, and provides restoring force to the bridge to ensure the safety of bridge construction. During major earthquakes, the deformation of the steel damping pair is induced, thereby buffering and dissipating energy during the major earthquake. At extreme displacement, the second pin abuts against the side wall of the second limiting groove of the limiting plate, thereby providing a good limiting effect to prevent beam falling and further ensuring the safety of the beam frame equipment.

[0025] Secondly, this invention is mainly applied to highways, railways, and urban roads, thereby effectively reducing the impact of earthquakes on bridge facilities. Attached Figure Description

[0026] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0027] Figure 1 The schematic diagram illustrates the structure of the bridge seismic resilience device according to the present invention;

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

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

[0030] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0031] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

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

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0034] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The invention will now be further described with reference to 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 the bridge seismic resilience device 100 according to the present invention;

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

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

[0040] In one embodiment, such as Figures 1-2 As shown, the housing 21 includes a main body 211 and a fixing part 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 mobility between the first base 11 and the housing 21.

[0041] Preferably, the main body 211 is constructed in a U-shape. Two seismic damping components 23 are provided in this invention, and the two components 23 are respectively fixed to the inner walls on both sides of the main body 211. Preferably, the end of the seismic damping component 23 away from the main body 211 is tightly fitted with the connecting plate 22. Therefore, when the bridge seismic resilience device 100 shifts, the seismic damping 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 this invention, the seismic resisting component 23 is constructed of either a rubber elastomer or a polyurethane elastomer. Therefore, the seismic resisting component 23 can provide a certain restoring force to the bridge seismic toughness device 100. That is, during the first-level protection operation, after the displacement caused by the seismic energy is completely offset, the structural characteristics of the seismic resisting component 23 itself can provide an effective restoring force to the bridge to ensure the safety of bridge construction.

[0043] According to the present invention, the bridge seismic resilience device 100 further includes a second seismic mechanism adapted to the first seismic mechanism. For example... Figures 1-2 As shown, preferably, the second seismic-resistant mechanism includes a pair of steel damping pairs 31 symmetrically arranged on both sides of the housing 21, and a limiting plate 32 disposed between the main body 211 and the steel damping pairs 31. Preferably, the limiting plate 32 is provided with a through hole that allows the first pin 301 (described below) to pass through.

[0044] In this invention, such as Figures 1-2 As shown, a first limiting groove (not shown) for limiting the movement path of the anti-seismic member 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. The contents of these grooves will be described in detail below.

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

[0046] In one embodiment, the first pin 301 can extend sequentially through the first connecting 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 small to medium earthquakes, the first base 11 can drive the box 21 to move laterally under the action of external force, thereby generating energy dissipation and buffering effects through the connecting plate 22 and the seismic resisting member 23. This further completes the primary protection function of the device.

[0047] Meanwhile, since the first limiting groove of the main body 211 is an elongated hole structure, it can provide a certain amount of displacement for the seismic resisting member 23 until the first pin 301 abuts against the side wall of the first limiting groove. Furthermore, due to the structural characteristics of the seismic resisting member 23 itself, it provides effective restoring force to the bridge to ensure the safety of bridge construction.

[0048] In one embodiment, the second pin 302 can extend sequentially through the second connecting end 312 of the steel damping pair 31 and the second limiting groove 321 of the limiting plate 32 to be fixedly connected to the second base 12. Therefore, during a large earthquake (after the first-level protection work is completed), the shear movement of the seismic member 23 reaches its 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 deform (i.e., tensile or compressive plastic deformation) under the combined action of the first base 11 and the box 21 to achieve buffering and energy dissipation, thereby completing the second-level protection work of this device.

[0049] In one embodiment, when the steel damping pair 31 undergoes further displacement until it reaches its displacement limit (after the secondary protection work is completed), the second pin 302 abuts against the side wall of the second limiting groove 321, thereby completing the tertiary protection work of the device. Preferably, the tertiary protection work can solidify the entire device, thereby playing the role of preventing beams 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 anchorage system. Therefore, the bridge seismic toughness device 100 can provide the bridge with automatic reset, buffering and energy dissipation, and anti-falling beam effects during an earthquake, and ensures the safety of the bridge engineering facilities through three levels of protection.

[0051] The three levels of protection measures in this invention are described in detail below:

[0052] Firstly, Level 1 protection measures are primarily implemented in small to medium-sized earthquakes.

[0053] During an earthquake, the first base 11 can drive the box 21 to move laterally under the action of external force (earthquake energy), thereby generating energy dissipation and buffering effect through the connecting plate 22 and the anti-seismic component 23, and can also self-reset through the anti-seismic component 23, thus completing the first-level protection work of this device.

[0054] Preferably, the ultimate displacement of the seismic resisting member 23 is when the first pin 301 and the side wall of the first limiting groove are in contact. Under this level of protection, after the displacement caused by seismic energy is completely offset, the structural characteristics of the seismic resisting member 23 itself can provide effective restoring force for the bridge, thereby ensuring the safety of bridge construction.

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

[0056] At this point, the primary protective measures become ineffective, and the seismic resisting component 23 moves to its limit displacement, i.e., the first pin 301 abuts against the side wall of the first limiting groove. Subsequently, the steel damping pair 31 can deform (i.e., tensile or compressive plastic deformation) under the combined pulling action of the first base 11 and the box 21, thereby achieving the function of buffering and dissipating seismic energy, thus completing the secondary protection work of this device.

[0057] Finally, Level 3 protection measures occur during further seismic damage displacement following Level 2 protection measures.

[0058] At this point, the steel damping pair 31 reaches its limit displacement, that is, the second pin 302 abuts against the side wall of the second limiting groove 321. Therefore, the displacement of the steel damping pair 31 is restricted by the limiting plate 32, thereby fixing the entire device and playing a role in preventing beam fall, further ensuring the safety of bridge engineering facilities.

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

[0060] First, under the action of an earthquake, the first base 11 drives the box 21 to move laterally, thereby shearing with the anti-seismic component 23 through the connecting plate 22 to generate energy dissipation and buffering effect, and can self-reset through the anti-seismic component 23, thus completing the first-level protection of this device.

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

[0062] Finally, when the second pin 302 abuts against the side wall of the second limiting groove 321, the displacement of the steel damping pair 31 can be limited by the limiting plate 32, thereby fixing the entire device to prevent the beam from falling and thus ensuring the safety of the bridge engineering facilities.

[0063] Compared with existing technologies, the advantages of this invention are:

[0064] Firstly, this invention can provide different levels of protection for different earthquake conditions. Specifically, during minor and moderate earthquakes, the shearing motion between the seismic resisting component 23 and the connecting plate 22 can generate energy dissipation and buffering effects, and provide restoring force to the bridge to ensure the safety of bridge construction. During major earthquakes, the deformation of the steel damping pair 31 can buffer and dissipate energy during major earthquakes. During extreme displacement, the second pin 302 abuts against the side wall of the second limiting groove 321 of the limiting plate 32, thereby providing a good limiting effect to prevent beam falling and further ensuring the safety of the beam frame equipment.

[0065] Secondly, this invention is mainly applied to highways, railways, and urban roads, thereby effectively reducing the impact of earthquakes on bridge facilities.

[0066] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bridge seismic toughness device, comprising: The first base (11) and the second base (12) are arranged at intervals. The first seismic-resistant mechanism includes a housing (21) connected to the first base (11), a connecting plate (22) arranged laterally within the housing (21), and a seismic-resistant component (23) disposed within the housing (21) and subject to sliding friction with the connecting plate (22). A second seismic-resistant mechanism adapted to the first seismic-resistant mechanism includes a pair of steel damping pairs (31) symmetrically arranged on both sides of the housing (21). The steel damping pairs (31) are connected to the second base (12). The housing (21) includes a main body (211). A first limiting groove for limiting the movement path of the seismic-resistant component (23) is provided on the main body (211). A limiting plate (32) is provided between the main body (211) and the steel damping pairs (31). A limiting plate (32) for limiting the deformation displacement of the steel damping pairs (31) is provided on the limiting plate (32). The second limiting groove (321) and the second seismic mechanism also include a first connecting end (311) extending through the steel damping pair (31), the limiting plate (32), the first limiting groove of the main body (211) and the first pin (301) of the connecting plate (22), and a second connecting end (312), the second limiting groove (321) of the limiting plate (32) and the second pin (302) extending through the steel damping pair (31), the second limiting groove (321) of the limiting plate (32) and the second base (12), the first base (11) being connected to the bridge beam and the second base (12) being connected to the pier anchor system.

2. The bridge seismic toughness device according to claim 1, characterized in that, The housing (21) includes a fixing part (212) extending outward from the main body (211) and rotatably connected to the first base (11) via a connecting shaft (213), wherein the shock-absorbing member (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 shock-resistant component (23) is constructed of either a rubber elastomer or a polyurethane elastomer.

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

5. The bridge seismic toughness device according to claim 4, characterized in that, The first base (11) is configured to drive the box (21) to move laterally under the action of external force, thereby shearing with the shock absorber (23) through the connecting plate (22) until the first pin (301) abuts against the side wall of the first limiting groove.

6. The bridge seismic toughness device according to claim 5, characterized in that, The steel damping pair (31) is configured to deform under the combined action of the first base (11) and the housing (21) until the second pin (302) abuts against the side wall of the second limiting groove (321).

7. An adjustment method utilizing the bridge seismic toughness device according to any one of claims 1 to 6, comprising the following: S1. Under the action of external force, the first base (11) drives the box (21) to move laterally, thereby causing the shock-absorbing component (23) to perform shearing motion through the connecting plate (22); S2, until the first pin (301) abuts against the side wall of the first limiting groove, the steel damping pair (31) deforms under the combined action of the first base (11) and the box (21) until the second pin (302) abuts against the side wall of the second limiting groove (321).

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