Bridge shock absorption and isolation supporting device

Abstract

The utility model discloses a bridge seismic mitigation and isolation supporting device which comprises support sets and a shearing force mortise and tenon set, the support sets and the shearing force mortise and tenon set are arranged between a beam body and a pier, the shearing force mortise and tenon set is located between the two support sets, the support sets are used for bearing vertical loads of the beam body, and the shearing force mortise and tenon set is used for bearing horizontal loads of the beam body. The utility model has the beneficial effects that the vertical load of the beam body is borne by the support group, the horizontal load of the beam body is borne by the shear mortise and tenon group, when an earthquake occurs and the horizontal ultimate bearing capacity of the shear mortise and tenon is exceeded, the shear mortise and tenon are cut off and damaged, and the sliding constraint of the support is relieved; compared with an integral seismic mitigation and isolation support with two limiting devices stressed and the stressed position deviating from the transverse end of a beam body, the integral seismic mitigation and isolation support is more reliable in stress, and meanwhile due to the fact that the shearing force clamping tenons are not subjected to vertical loads, the top beam does not need to be unloaded, and direct replacement can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a bridge seismic isolation and energy dissipation bearing device. Background Art

[0002] Seismic isolation and energy dissipation devices are divided into two categories: integral type and separated type. The integral type seismic isolation and energy dissipation devices include lead rubber bearings, high damping rubber bearings and friction pendulum seismic isolation and energy dissipation bearings; the separated type seismic isolation and energy dissipation devices include rubber bearings + metal dampers, rubber bearings + friction dampers. The main component for energy dissipation of a seismic isolation bridge is the seismic isolation and energy dissipation device, which is allowed to be damaged during an earthquake. The performance of the seismic isolation and energy dissipation device needs to be reliable, and it can be replaced or easily replaced after an earthquake. Currently, in railway bridges, rubber bearings are less used, and basically friction pendulum integral type seismic isolation bearings are adopted. The bearings are simultaneously subjected to vertical loads and horizontal loads, there are problems of horizontal force synchronization and performance reliability under earthquakes, and when replacing after an earthquake, it is necessary to unload the beam by jacking. Even if the main body of the bearing does not break, it is relatively difficult to replace the limit device. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a bridge seismic isolation and energy dissipation bearing device.

[0004] The purpose of the utility model is realized by the following technical solutions: a bridge seismic isolation and energy dissipation bearing device, including a bearing group and a shear key group. The bearing group and the shear key group are arranged between the beam body and the bridge pier, and the shear key group is located between the two bearing groups. The bearing group is used to bear the vertical load of the beam body, and the shear key group is used to bear the horizontal load of the beam body.

[0005] Preferably, the bearing group includes bearing a and bearing b, the shear key group includes a longitudinal movable shear key and a fixed shear key. Bearing a and the longitudinal movable shear key form support a, and bearing b and the fixed shear key form support b. Both support a and support b are installed on the bridge pier.

[0006] Preferably, bearing a includes a top seat plate a, an upper seat plate a, a middle seat plate a and a lower seat plate a. The lower seat plate a is installed on the bridge pier. A lower spherical friction pair is arranged between the upper surface of the lower seat plate a and the lower surface of the middle seat plate a. An upper spherical friction pair is arranged between the upper surface of the middle seat plate a and the lower surface of the upper seat plate a. A plane friction pair is arranged between the upper surface of the upper seat plate a and the lower surface of the top seat plate a. The upper surface of the top seat plate a is connected to the beam body. A guiding friction pair is arranged between the side surface of the upper seat plate a and the inner side surface of the top seat plate a.

[0007] Preferably, the longitudinal movable shear key includes a clamping plate a, a clamping plate b and a limiting plate a. The clamping plate a is installed on the beam body. A limiting plate a is arranged on the lower surface of the clamping plate a. The clamping plate a and the limiting plate a together form a "π" shape. The upper end of the clamping plate b has a convex block, which is located between the two limiting plates a. A second guiding friction pair is arranged between the convex block and the limiting plate a. The clamping plate b is installed on the pier.

[0008] Preferably, the bearing b includes an upper seat plate b, a middle seat plate b and a lower seat plate b. The lower seat plate b is installed on the pier. A second lower spherical friction pair is arranged between the upper surface of the lower seat plate b and the lower surface of the middle seat plate b. A second upper spherical friction pair is arranged between the upper surface of the middle seat plate b and the lower surface of the upper seat plate b. The upper surface of the upper seat plate b is connected to the beam body.

[0009] Preferably, the fixed shear key includes a clamping plate c, a clamping plate d and a second limiting plate. Second limiting plates are arranged at both ends of the lower surface of the clamping plate c. The upper end of the clamping plate d has a convex block b, which is located between the two second limiting plates.

[0010] Preferably, a lubricating layer is coated on the surface of the planar friction pair.

[0011] Preferably, the lower spherical friction pair, the upper spherical friction pair, the second lower spherical friction pair and the second upper spherical friction pair are all dry frictions.

[0012] The utility model has the following advantages: In the utility model, the vertical load of the beam body is borne by the bearing group, and the horizontal load of the beam body is borne by the shear key group. When an earthquake occurs and exceeds the horizontal ultimate bearing capacity of the shear key, the shear key is cut and damaged, and the sliding constraint of the bearing is released. Since only one shear key in each support bears the horizontal load and is located in the middle of the pier, compared with the two limiting devices of the integral seismic isolation bearing being stressed and the stress positions being biased towards the transverse ends of the beam body, the stress of this device is more reliable. At the same time, since the shear key is not subject to the vertical load and there is no need to unload the beam top, it can be directly replaced. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of the bridge seismic isolation support device;

[0014] Figure 2 It is a structural schematic diagram of the position distribution of the support a and the support b;

[0015] Figure 3 It is a longitudinal bridge direction structural schematic diagram of the bearing a;

[0016] Figure 4 It is a transverse bridge direction structural schematic diagram of the bearing a;

[0017] Figure 5 It is a longitudinal bridge direction structural schematic diagram of the bearing b;

[0018] Figure 6 It is a schematic structural diagram of support b in the transverse direction of the bridge.

[0019] Figure 7 It is a schematic structural diagram of the longitudinal movable shear key in the longitudinal direction of the bridge.

[0020] Figure 8 It is a schematic structural diagram of the longitudinal movable shear key in the transverse direction of the bridge.

[0021] Figure 9 It is a schematic structural diagram of the fixed shear key in the longitudinal direction of the bridge.

[0022] Figure 10 It is a schematic structural diagram of the fixed shear key in the transverse direction of the bridge.

[0023] In the figure, 1-beam body, 2-support group, 3-shear key group, 4-pier, 5-support a, 6-longitudinal movable shear key, 7-support b, 8-fixed shear key, 9-bottom seat plate a, 10-lower spherical friction pair, 11-middle seat plate a, 12-upper spherical friction pair, 13-upper seat plate a, 14-plane friction pair, 15-top seat plate a, 16-guide friction pair, 17-bottom seat plate b, 18-second lower spherical friction pair, 19-middle seat plate b, 20-second upper spherical friction pair, 21-upper seat plate b, 22-card plate a, 23-limit plate a, 24-card plate b, 25-second guide friction pair, 26-card plate c, 27-second limit plate, 28-card plate d. Specific embodiments

[0024] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0026] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0027] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In this embodiment, as Figure 1 shown, a bridge seismic isolation and energy dissipation bearing device includes a bearing group 2 and a shear key group 3. The bearing group 2 and the shear key group 3 are arranged between the beam body 1 and the bridge pier 4, and the shear key group 3 is located between the two bearing groups 2. The bearing group 2 is used to bear the vertical load of the beam body 1, and the shear key group 3 is used to bear the horizontal load of the beam body 1. By the bearing group 2 bearing the vertical load of the beam body 1 and the shear key group 3 bearing the horizontal load of the beam body 1, when an earthquake occurs and exceeds the horizontal ultimate bearing capacity of the shear key, the shear key is cut and damaged, releasing the sliding constraint of the bearing. Since only one shear key in each bearing bears the horizontal load and is located in the middle of the bridge pier 4, compared with the two limit devices of the integral seismic isolation bearing being stressed and the stress positions being biased towards the transverse ends of the beam body 1, the force of this device is more reliable. At the same time, since the shear key is not subject to the vertical load and there is no need to unload the top beam, it can be directly replaced.

[0031] In this embodiment, as Figure 2As shown, the support group 2 includes support a5 and support b7, the shear key group 3 includes the longitudinal movable shear key 6 and the fixed shear key 8. Support a5 and the longitudinal movable shear key 6 form support a, and support b7 and the fixed shear key 8 form support b. Both support a and support b are installed on the bridge pier 4. Further, as Figure 3 and Figure 4 shown, support a5 includes top seat plate a15, upper seat plate a13, middle seat plate a11 and lower seat plate a9. The lower seat plate a9 is installed on the bridge pier 4. A lower spherical friction pair 10 is provided between the upper surface of the lower seat plate a9 and the lower surface of the middle seat plate a11. An upper spherical friction pair 12 is provided between the upper surface of the middle seat plate a11 and the lower surface of the upper seat plate a13. A planar friction pair 14 is provided between the upper surface of the upper seat plate a13 and the lower surface of the top seat plate a15. Preferably, the surface of the planar friction pair 14 is coated with a lubricating layer. The upper surface of the top seat plate a15 is connected to the beam body 1. A guiding friction pair 16 is provided between the side surface of the upper seat plate a13 and the inner side surface of the top seat plate a15. Still further, as Figure 7 and Figure 8 shown, the longitudinal movable shear key 6 includes clamping plate a22, clamping plate b24 and limiting plate a23. The clamping plate a22 is installed on the beam body 1. The limiting plate a23 is provided on the lower surface of the clamping plate a22. And the clamping plate a22 and the limiting plate a23 together form a "π" shape. The upper end of the clamping plate b24 has a convex block. The convex block is located within the two limiting plates a23. And a second guiding friction pair 25 is provided between the convex block and the limiting plates a23. The clamping plate b24 is installed on the bridge pier 4. In this embodiment, as Figure 5 and Figure 6 shown, support b7 includes upper seat plate b21, middle seat plate b19 and lower seat plate b17. The lower seat plate b17 is installed on the bridge pier 4. A second lower spherical friction pair 18 is provided between the upper surface of the lower seat plate b17 and the lower surface of the middle seat plate b19. A second upper spherical friction pair 20 is provided between the upper surface of the middle seat plate b19 and the lower surface of the upper seat plate b21. The upper surface of the upper seat plate b21 is connected to the beam body 1. Further, as Figure 9 and Figure 10As shown in the figure, the fixed shear key 8 includes a clamping plate c26, a clamping plate d28 and a second limiting plate 27. Second limiting plates 27 are arranged at both ends of the lower surface of the clamping plate c26. The upper end of the clamping plate d28 has a convex block b, and the convex block b is located between the two second limiting plates 27. Further, the lower spherical friction pair 10, the upper spherical friction pair 12, the second lower spherical friction pair 18 and the second upper spherical friction pair 20 are all dry friction. Specifically, under normal circumstances, the vertical load of the beam body 1 is borne by the bearing a5 and the bearing b7, and the horizontal load of the beam body 1 is borne by the longitudinal movable shear key 6 and the fixed shear key 8. Among them, the moving direction of the longitudinal movable shear key 6 is the longitudinal bridge direction, so as not to affect the normal sliding of the bearing group 2, and further the normal operation of the high-speed railway bridge does not lift, ensuring the flatness of the line and the safety of train operation. During the reciprocating sliding process of the bearing a5 and the bearing b7, seismic energy is consumed through the high friction resistance of the lower spherical friction pair 10, the upper spherical friction pair 12, the second lower spherical friction pair 18 and the second upper spherical friction pair 20, and the natural vibration period is extended, so as to carry out seismic isolation and vibration reduction; the main functions of the longitudinal movable shear key 6 and the fixed shear key 8 here are to ensure that under non-seismic and frequently-occurring earthquake actions, the beam body 1 does not slide relative to the corresponding bearings in the limiting direction, that is, the longitudinal movable shear key 6 and the fixed shear key 8 play a role of rigid resistance; when an earthquake occurs and exceeds the horizontal ultimate bearing capacity of the shear key, the shear key is cut and damaged, releasing the sliding constraint of the bearing. Since only one shear key in each support bears the horizontal load, that is, the longitudinal movable shear key 6 or the fixed shear key 8, and is located in the middle of the pier 4, compared with the two limiting devices of the integral seismic isolation bearing being stressed and the stress positions being biased towards the transverse ends of the beam body 1, the stress of this device is more reliable. At the same time, since the longitudinal movable shear key 6 and the fixed shear key 8 are not subject to vertical loads, there is no need to unload the top beam and they can be directly replaced; after the earthquake, the bearings a5 and b7 form a restoring force by virtue of the low-level excitation at the end of the earthquake and the self-weight component of the superstructure in the bearing a5 and b7 along the tangent direction of the curved surface, so that the bearings a5 and b7 are reset.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge seismic isolation and vibration reduction support device, characterized in that: It includes a support group (2) and a shear key group (3). The support group (2) and the shear key group (3) are arranged between the beam body (1) and the pier (4), and the shear key group (3) is located between the two support groups (2). The support group (2) is used to bear the vertical load of the beam body (1), and the shear key group (3) is used to bear the horizontal load of the beam body (1). The shear key group (3) includes a longitudinal movable shear key (6) and a fixed shear key (8). The longitudinal movable shear key (6) includes a clamping plate a (22), a clamping plate b (24) and a limiting plate a (23). The clamping plate a (22) is installed on the beam body (1), and the limiting plate a (23) is arranged on the lower surface of the clamping plate a (22). The clamping plate a (22) and the limiting plate a (23) together form a "π" shape. The upper end of the clamping plate b (24) has a convex block, which is located within the two limiting plates a (23), and a second guiding friction pair (25) is arranged between the convex block and the limiting plate a (23). The clamping plate b (24) is installed on the pier (4). The fixed shear key (8) includes a clamping plate c (26), a clamping plate d (28) and a second limiting plate (27). The second limiting plates (27) are arranged at both ends of the lower surface of the clamping plate c (26). The upper end of the clamping plate d (28) has a convex block b, which is located between the two second limiting plates (27).

2. The bridge seismic isolation and vibration reduction bearing device according to claim 1, wherein: The support group (2) includes a support a (5) and a support b (7). The support a (5) and the longitudinal movable shear key (6) form a support a, and the support b (7) and the fixed shear key (8) form a support b. Both the support a and the support b are installed on the pier (4).

3. The bridge seismic isolation and energy dissipation bearing device according to claim 2, characterized in that: The support a (5) includes a top seat plate a (15), an upper seat plate a (13), a middle seat plate a (11) and a lower seat plate a (9). The lower seat plate a (9) is installed on the pier (4). A lower spherical friction pair (10) is arranged between the upper surface of the lower seat plate a (9) and the lower surface of the middle seat plate a (11). An upper spherical friction pair (12) is arranged between the upper surface of the middle seat plate a (11) and the lower surface of the upper seat plate a (13). A plane friction pair (14) is arranged between the upper surface of the upper seat plate a (13) and the lower surface of the top seat plate a (15). The upper surface of the top seat plate a (15) is connected to the beam body (1). A guiding friction pair (16) is arranged between the side surface of the upper seat plate a (13) and the inner side surface of the top seat plate a (15).

4. The bridge seismic isolation and energy dissipation bearing device according to claim 3, characterized in that: The bearing b (7) includes an upper seat plate b (21), a middle seat plate b (19) and a lower seat plate b (17). The lower seat plate b (17) is installed on the pier (4). A second lower spherical friction pair (18) is provided between the upper surface of the lower seat plate b (17) and the lower surface of the middle seat plate b (19). A second upper spherical friction pair (20) is provided between the upper surface of the middle seat plate b (19) and the lower surface of the upper seat plate b (21). The upper surface of the upper seat plate b (21) is connected to the beam body (1).

5. The bridge seismic isolation and energy dissipation bearing device according to claim 4, characterized in that: The surface of the planar friction pair (14) is coated with a lubricating layer.

6. The bridge seismic isolation and energy dissipation bearing device according to claim 5, characterized in that: The lower spherical friction pair (10), the upper spherical friction pair (12), the second lower spherical friction pair (18) and the second upper spherical friction pair (20) are all dry friction.

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