Anti-seismic energy-absorbing device for bridges
By installing a soft steel damping element between the slider and the shoulder at the bridge anti-falling beam stop, and combining plastic deformation and sliding friction energy dissipation, the problems of structural damage and low energy dissipation efficiency caused by rigid collision between the anti-falling beam stop and the beam are solved, achieving efficient dissipation of seismic energy and protecting the safety of the bridge structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAINAN UNIV
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-21
AI Technical Summary
In existing bridge seismic resistance technologies, rigid collisions between anti-falling beam blocks and the beam body lead to structural damage, have low energy dissipation efficiency, are difficult to effectively dissipate seismic energy, and increase the risk of load on bridge piers and foundations.
A soft steel damping element is used between the slider and the shoulder to form an energy dissipation mechanism that combines plastic deformation and sliding friction, avoiding rigid collisions between the beam and the anti-falling beam block. The instantaneous decoupling of the beam structure is achieved through the shear strength configuration of the pin.
It improves the safety of bridge structures during earthquakes by efficiently dissipating seismic energy, reducing the dynamic load on bridge piers, minimizing structural damage, and enhancing the seismic performance of bridges.
Smart Images
Figure CN224531428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge seismic resistance technology, and in particular to a seismic energy absorption device for bridges. Background Technology
[0002] In the existing field of bridge seismic resistance technology, anti-fall beam blocks mainly restrict the displacement of the beam through rigid collision, but they have significant drawbacks: First, the instantaneous impact force generated by the rigid collision between the beam and the anti-fall beam block can easily lead to local damage such as concrete spalling and steel bar buckling, exacerbating structural failure; Second, traditional anti-fall beam blocks have limited energy dissipation capacity, and seismic energy cannot be effectively dissipated, which will lead to greater loads on the piers and foundations, increasing the risk of overall collapse; Third, although existing improved technologies such as rubber buffer pads or metal dampers can improve energy dissipation efficiency, their energy dissipation mechanisms are still relatively simple and cannot meet the seismic resistance requirements of bridges under major earthquakes. Therefore, it is urgent to develop a seismic energy absorption device with higher energy dissipation efficiency to better protect the bridge structure during earthquakes. Utility Model Content
[0003] The purpose of this invention is to overcome the technical problems of existing technologies that restrict the displacement of the beam by rigid collision between the anti-fall beam block and the beam body, which easily leads to damage to the beam structure and increases the load on the piers and foundations, and has low energy consumption efficiency, and to provide a seismic energy absorption device for bridges.
[0004] In a first aspect, this utility model provides a seismic energy absorption device for bridges, comprising: Mounting base, used to connect with the side wall of the beam, the mounting base is provided with a strip hole and a shoulder, the shoulder is located on one side of the strip hole along the length direction of the strip hole; The slider has a pin on the side facing the slotted hole. The pin is inserted into the slotted hole to make the slider slide in the slotted hole. The side of the slider facing the mounting base abuts against the mounting base. The side of the slider away from the shoulder is used to abut against the anti-fall beam block. The displacement of the beam relative to the anti-fall beam block can drive the slider to slide along the slotted hole to move closer to or away from the shoulder. The soft steel damping element is located between the slider and the shoulder. The slider can cause the soft steel damping element to deform when it moves closer to or further away from the shoulder.
[0005] Preferably, a locking nut is threaded onto the pin, and the locking nut is located on the side of the strip hole away from the slider.
[0006] Preferably, the shear strength of the anti-fall beam stop block and the shear strength of the shoulder are both greater than the shear strength of the pin.
[0007] Preferably, the mild steel damping element includes a U-shaped mild steel, with its two ends abutting against the slider and the shoulder, respectively.
[0008] Preferably, the number of U-shaped mild steel bars is at least two, and the U-shaped mild steel bars are distributed at intervals along the width direction of the strip hole.
[0009] Preferably, the mounting base is provided with an operating groove on at least one side along the length direction of the strip hole, and / or, the mounting base is provided with an operating groove on at least one side along the width direction of the strip hole; the operating groove communicates with the side of the strip hole opposite to the slider.
[0010] Preferably, the mounting base is provided with connecting bolts, which are used to connect with the pre-embedded connectors on the side wall of the beam.
[0011] Preferably, a buttress is provided on the side of the shoulder facing away from the slider.
[0012] Preferably, there are at least two buttresses, which are spaced apart along the width of the slot.
[0013] Preferably, the mounting base has at least two strip holes arranged side by side, and the number and position of the pins match the number and position of the strip holes.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a seismic energy absorption device for bridges. By sliding a slider on the mounting base and setting a soft damping element between the slider and the shoulder, a combined energy dissipation mechanism combining plastic deformation energy dissipation and sliding friction energy dissipation can be formed. This can avoid the beam from directly colliding rigidly with the anti-falling beam block, and dissipate seismic energy and reduce the dynamic load on the bridge piers with higher efficiency, thereby better protecting the structural safety of the bridge during earthquakes.
[0015] This invention can further configure the shear strength of the pin to be lower than that of the anti-fall beam block and the shoulder, so that the pin can break preferentially during a major earthquake, thereby achieving instantaneous decoupling between the beam structure and the anti-fall beam block structure, and avoiding structural damage caused by hard impacts between the beam and the anti-fall beam block, or between the slider and the mounting base. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a bridge anti-seismic energy absorption device according to the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of a bridge anti-seismic energy absorption device according to the present invention. Figure 2 ; Figure 3 This is a three-dimensional partial cross-sectional view of a bridge anti-seismic energy absorption device according to the present invention; Figure 4 This is a partial three-dimensional structural diagram of a bridge-use anti-seismic energy absorption device of this utility model when installed on a bridge; icon: 1-Mounting base; 11-Strip hole; 12-Shoulder; 13-Buttress; 14-Operating slot; 15-Connecting bolt; 2-Slider; 21-Pin; 22-Locking nut; 3-U-shaped mild steel; 4-Beam body; 41-Embedded steel plate; 5-Anti-falling beam block. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0018] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0019] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0020] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0021] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0022] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0023] Example 1 like Figures 1 to 4 As shown, a seismic energy absorption device for bridges includes a mounting base 1, a slider 2, and a soft steel damping element. One side of the mounting base 1 along its thickness direction is used to connect with the side wall of the beam 4. The other side of the mounting base 1 along its thickness direction is provided with a strip hole 11 and a shoulder 12. The shoulder 12 is located on one side of the strip hole 11 along its length direction. A pin 21 is provided on the side of the slider 2 facing the strip hole 11. The pin 21 is inserted into the strip hole 11 to make the slider 2 slidably connected to the strip hole 11. The side of the slider 2 facing the mounting base 1 abuts against the mounting base 1. The side of the slider 2 away from the shoulder 12 abuts against the anti-fall beam block 5. The displacement of the beam 4 relative to the anti-fall beam block 5 can drive the slider 2 to slide along the strip hole 11, thereby moving closer to or away from the shoulder 12. The soft steel damping element is disposed between the slider 2 and the shoulder 12. The slider 2 moving closer to or away from the shoulder 12 can cause the soft steel damping element to deform.
[0024] exist Figures 1 to 4 The diagram also uses a Cartesian coordinate system to label each direction, where the X-axis represents the length direction of the slot 11, i.e., the longitudinal direction; the Y-axis represents the width direction of the slot 11; and the Z-axis represents the thickness direction of the mounting base 1. It should be noted that... Figures 1 to 3 The dotted lines used to separate the mounting base 1, shoulder 12 and buttress 13 are only for easy differentiation of the mounting base 1, shoulder 12 and buttress 13. However, the mounting base 1, shoulder 12 and buttress 13 can be different parts of an integrated component or independent components that are connected to each other. Figure 3 The structure of the end of the mounting base 1 away from the slider 2 was cut out to facilitate observation of the strip hole 11, the pin 21 and the locking nut 22.
[0025] When using the seismic energy absorption device for this bridge, the device is placed on one side of the existing anti-fall beam block 5 along the longitudinal direction of the bridge. The mounting base 1 is connected to the side wall of the beam 4, and the side of the slider 2 facing away from the shoulder 12 is placed against the anti-fall beam block 5. When an earthquake occurs and causes the beam 4 to shift relative to the anti-fall beam block 5, the mounting base 1 will also shift relative to the slider 2, causing the slider 2 to continuously move closer to or away from the shoulder 12. On the one hand, this forces the soft steel damping element to undergo repeated tensile and compressive deformation, thus forming a plastic deformation energy dissipation mechanism. On the other hand, it also causes continuous sliding friction between the slider 2 and the side of the mounting base 1 facing away from the beam 4, thus forming a frictional sliding energy dissipation mechanism. In other words, the seismic energy absorption device for this bridge has both energy dissipation mechanisms, which can dissipate seismic energy more efficiently, reduce the dynamic load on the piers, and thus better protect the structural safety of the bridge during earthquakes.
[0026] In an optional implementation, when using the seismic energy absorption device for this bridge, it can be as follows: Figure 4 As shown, anti-seismic energy absorption devices for this bridge are respectively installed on both sides of the anti-fall beam block 5 along the longitudinal direction of the bridge, so that seismic energy can be dissipated from two directions at the same time, thereby further improving the seismic energy dissipation efficiency of this embodiment.
[0027] In optional embodiments, the specific shape of the strip hole 11 includes, but is not limited to, a rectangle, an ellipse, or a racetrack shape, as long as it can provide the slider 2 with a degree of freedom of movement, allowing the slider 2 to move closer to or away from the shoulder 12.
[0028] In optional embodiments, the pin 21 may take the form of, but is not limited to, a bolt, an anchor, a metal shaft, or a concrete column, as long as it can be inserted into the strip hole 11 and allow the slider 2 to form a sliding connection with the mounting base 1.
[0029] In an optional implementation, the mild steel damping element can be an existing product, such as C-shaped mild steel, U-shaped mild steel, or corrugated mild steel, as long as it can dissipate vibration energy through its own deformation.
[0030] In an optional embodiment, a locking nut 22 is threaded onto the pin 21, and the locking nut 22 is located on the side of the strip hole 11 away from the slider 2.
[0031] In this embodiment, a locking nut 22 is added to the pin 21. On the one hand, the locking nut 22 can limit the pin 21 to prevent it from dislodging from the slot 11, thereby avoiding the accidental separation of the slider 2 from the mounting base 1. On the other hand, the locking nut 22 can be tightened or loosened to increase or decrease the pressure between the slider 2 and the mounting base 1, thereby changing the friction between the slider 2 and the mounting base 1. This allows this embodiment to flexibly adjust the damping and energy dissipation intensity according to different usage scenarios, and has better versatility.
[0032] In an optional embodiment, when the slider 2 is a concrete component, the pin 21 is an anchor bolt, which can ensure a reliable connection between the pin 21 and the slider 2, and can also utilize the existing thread on the anchor bolt to lock the nut 22.
[0033] In an optional embodiment, the shear strength of the anti-fall beam block 5 and the shear strength of the shoulder 12 are both greater than the shear strength of the pin 21.
[0034] This embodiment ensures that the shear strength of the pin 21 is lower than both the shear strength of the anti-fall beam block 5 and the shear strength of the shoulder 12. Therefore, when an earthquake of excessive intensity causes excessive displacement of the beam 4 relative to the anti-fall beam block 5, resulting in the pin 21 contacting the end of the slot 11 and generating shear force, the pin 21 will fracture preferentially. This fracture process dissipates some of the earthquake energy and disconnects the connection between the slider 2 and the mounting base 1, achieving instantaneous decoupling between this embodiment and the beam 4 structure. This avoids structural damage caused by hard impacts between the beam 4 and the anti-fall beam block 5, or between the slider 2 and the mounting base 1. Correspondingly, after the earthquake, this embodiment only requires repair of the pin 21, significantly improving the maintainability of this embodiment and reducing its operation and maintenance costs.
[0035] In an optional embodiment, the soft steel damping element includes a U-shaped soft steel 3, the two ends of which abut against the slider 2 and the shoulder 12, respectively.
[0036] This embodiment recommends using a mature U-shaped soft steel 3 as a soft steel damping element, which can reduce the procurement cost and structural complexity of this embodiment. Moreover, compared to mechanically connecting the U-shaped soft steel 3 to the slider 2, in this embodiment, the U-shaped soft steel 3 only abuts against the slider 2. Thus, when the pin 21 breaks due to excessive shear force, the slider 2 will directly detach from the mounting base 1 and will not continue to be connected to the U-shaped soft steel 3. This can prevent the failed slider 2 from moving unexpectedly under the elastic action of the U-shaped soft steel 3 and hitting the beam 4 or the anti-fall beam block 5.
[0037] In an optional embodiment, the number of U-shaped mild steels 3 is at least two, and the U-shaped mild steels 3 are distributed at intervals along the width direction of the strip hole 11.
[0038] This embodiment can improve the energy dissipation effect of the plastic deformation energy dissipation mechanism by using two or more U-shaped mild steels 3, so that this embodiment can be applied to larger structures or to cope with stronger earthquakes.
[0039] In an optional embodiment, the mounting base 1 is provided with an operation groove 14 on at least one side along the length direction of the strip hole 11, and / or the mounting base 1 is provided with an operation groove 14 on at least one side along the width direction of the strip hole 11; the operation groove 14 can be a blind groove or a through groove, but it is at least connected to the side of the strip hole 11 opposite to the slider 2.
[0040] This embodiment allows operators to easily operate the pin 21 through the operating groove 14 without disassembling the mounting base 1. For example, the wrench can be extended to the back of the slot 11 through the operating groove 14 to tighten or loosen the locking nut 22, thereby improving the ease of operation of this embodiment.
[0041] In an optional implementation, to avoid the operating groove 14 having an excessive impact on the strength of the mounting base 1, such as... Figure 3 As shown, the operating groove 14 is only provided on the side of the mounting base 1 along the length of the strip hole 11 to retain the shear strength of the mounting base 1 along the length of the strip hole 11; and the operating groove 14 passes through the mounting base 1 along the length of the strip hole 11, so that it can facilitate the operator to tighten or loosen the locking nut 22, and also facilitate the operator to tighten or loosen the connecting bolt 15 mentioned later.
[0042] In an optional embodiment, the mounting base 1 is provided with a connecting bolt 15, which is used to connect with the pre-embedded connector on the side wall of the beam 4. The pre-embedded connector includes, but is not limited to, a pre-embedded threaded sleeve or a pre-embedded steel plate 41.
[0043] This embodiment recommends one specific connection method between the mounting base 1 and the beam 4, which has the advantages of simple structure, mature technology and reliable connection.
[0044] In an optional embodiment, a buttress 13 is provided on the side of the shoulder 12 facing away from the slider 2.
[0045] This embodiment can provide additional shear strength to the shoulder 12 through the buttress 13, thereby reducing the risk of structural failure of the shoulder 12 under the thrust generated by the soft steel damping element.
[0046] In an optional embodiment, the number of buttresses 13 is at least two, and the buttresses 13 are spaced apart along the width direction of the strip hole 11.
[0047] This embodiment can further improve the shear strength of the shoulder 12, thereby ensuring the structural safety of the buttress 13.
[0048] In an optional embodiment, at least two strip holes 11 are arranged side by side on the mounting base 1. Each strip hole 11 is parallel to each other and is spaced apart along its width direction. The number and position of the pins 21 match the number and position of the strip holes 11.
[0049] This embodiment can, on the one hand, provide more adequate guidance and limitation for the slider 2 through two or more slots 11, reducing the risk of the slider 2 being stuck in the slots 11 due to movement deviation; on the other hand, the cooperation of two or more slots 11 and pins 21 can more evenly transfer the load between the slider 2 and the mounting base 1, reducing the risk of structural damage to the slider 2 and the mounting base 1 due to local stress concentration.
[0050] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A seismic energy absorption device for bridges, characterized in that, include: Mounting seat (1), the mounting seat (1) is used to connect with the side wall of the beam (4), the mounting seat (1) is provided with a strip hole (11) and a shoulder (12), the shoulder (12) is located on one side of the strip hole (11) along the length direction of the strip hole (11); The slider (2) has a pin (21) on the side facing the strip hole (11). The pin (21) is inserted into the strip hole (11) so that the slider (2) is slidably connected to the strip hole (11). The side of the slider (2) facing the mounting base (1) abuts against the mounting base (1). The side of the slider (2) away from the shoulder (12) is used to abut against the anti-fall beam block (5). The displacement of the beam (4) relative to the anti-fall beam block (5) can drive the slider (2) to slide along the strip hole (11) so as to approach or move away from the shoulder (12). A soft steel damping element is disposed between the slider (2) and the shoulder (12). The slider (2) can deform the soft steel damping element by moving closer to or further away from the shoulder (12).
2. The anti-seismic energy absorption device for bridges according to claim 1, characterized in that, A locking nut (22) is threaded onto the pin (21), and the locking nut (22) is located on the side of the strip hole (11) away from the slider (2).
3. The anti-seismic energy absorption device for bridges according to claim 1, characterized in that, The shear strength of the anti-fall beam block (5) and the shear strength of the shoulder (12) are both greater than the shear strength of the pin (21).
4. The anti-seismic energy absorption device for bridges according to claim 1, characterized in that, The soft steel damping element includes a U-shaped soft steel (3), the two ends of which abut against the slider (2) and the shoulder (12) respectively.
5. The anti-seismic energy absorption device for bridges according to claim 4, characterized in that, The number of the U-shaped soft steel (3) is at least two, and the U-shaped soft steel (3) is distributed at intervals along the width direction of the strip hole (11).
6. A seismic energy absorption device for bridges according to any one of claims 1 to 5, characterized in that, The mounting base (1) is provided with an operation groove (14) on at least one side along the length direction of the strip hole (11), and / or the mounting base (1) is provided with an operation groove (14) on at least one side along the width direction of the strip hole (11); the operation groove (14) is connected to the side of the strip hole (11) away from the slider (2).
7. A seismic energy absorption device for bridges according to any one of claims 1 to 5, characterized in that, The mounting base (1) is provided with connecting bolts (15), which are used to connect with the pre-embedded connectors on the side wall of the beam (4).
8. A seismic energy absorption device for bridges according to any one of claims 1 to 5, characterized in that, The shoulder (12) is provided with a buttress (13) on the side facing away from the slider (2).
9. A bridge seismic energy absorption device according to claim 8, characterized in that, The number of buttresses (13) is at least two, and the buttresses (13) are spaced apart along the width direction of the strip hole (11).
10. A seismic energy absorption device for bridges according to any one of claims 1 to 5, characterized in that, At least two strip holes (11) are arranged side by side on the mounting base (1), and the number and position of the pins (21) match the number and position of the strip holes (11).