Multi-stage horizontal shearing force friction pendulum seismic mitigation and isolation support
By designing a multi-stage limiting device group in the bridge support, the problem that conventional friction swing support cannot protect the bridge under small and micro-seismic conditions is solved, and multi-stage protection under different seismic forces is achieved to ensure that the bridge is affected by different earthquakes. Safety and stability in force state.
Patent Information
- Application Number
- CN202420793548.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-17
AI Technical Summary
Conventional friction swing reduction and seismic isolation support cannot effectively protect the bridge system in small and micro-seismic states, and cannot withstand seismic forces of different abrupt forces.
A multi-stage horizontal shear force friction swing reduction and isolation support is designed. By setting up limiting devices with different load-bearing capabilities, including multi-stage limiting devices. Each set of limiting devices includes limiting bolts and limiting steel plates and steel plates. The contact surface is an inclined surface, which can cut off the limiting device of different levels under different seismic forces, and generate corresponding isolation displacement to consume energy.
Multi-level protection of the bridge system is achieved, and stress can be released in stages under different levels of sudden force, ensuring the safety and stability of the bridge under different stress states.
Smart Images
Figure CN222160916U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of bridges, in particular to a multi-level horizontal shear force friction pendulum vibration isolation support. Background Art
[0002] With the development of the transportation infrastructure industry, there are many types of railway and highway bridges, and the requirements for the safety, reliability and functional practicality of the bridge system are becoming more and more stringent. In recent years, earthquakes have occurred frequently in many parts of my country, and most of them are small earthquakes and micro earthquakes. Conventional friction pendulum seismic isolation bearings need to withstand a certain seismic shear force to achieve the seismic isolation function of earthquakes. In the state of small earthquakes and micro earthquakes, they usually cannot play a role in seismic isolation protection of bridge systems. Utility Model Content
[0003] In order to solve the defect that the friction pendulum bearing cannot protect the bridge system when different sudden forces (seismic forces) are generated, the purpose of the utility model is to provide a multi-level horizontal shear force friction pendulum seismic isolation bearing. The multi-level horizontal shear force friction pendulum seismic isolation bearing realizes multi-level protection of the bridge system by setting limit devices with different bearing capacities.
[0004] The purpose of this utility model is achieved through the following technical solutions:
[0005] The utility model comprises an upper support plate and a lower support plate, wherein a spherical crown lining plate and an intermediate steel needle plate are respectively arranged between the upper support plate and the lower support plate, wherein the upper surface of the spherical crown lining plate is slidably connected with the plane of the upper support plate, the lower surface of the spherical crown lining plate is spherically slidably connected with the upper surface of the intermediate steel lining plate, and the lower surface of the intermediate steel lining plate is spherically slidably connected with the lower support plate; at least two groups of limiting device groups are arranged between the intermediate steel lining plate and the lower support plate, and the limiting device groups of each group have multiple levels of limiting devices, and the limiting devices of each level include limiting bolts and limiting steel plates, and one end of the limiting steel plate in the first level limiting device is fixedly connected with the intermediate steel lining plate , and the other end is fixedly connected to the limiting steel plate in the next-level limiting device through the limiting bolt in the first-level limiting device; one end of the limiting steel plate in the last-level limiting device is fixedly connected to the lower support plate, and the other end is fixedly connected to the limiting steel plate in the previous-level limiting device through the limiting bolt in the previous-level limiting device; in the limiting device between the first-level limiting device and the last-level limiting device, one end of the limiting steel plate is fixedly connected to the limiting steel plate in the adjacent previous-level limiting device through the limiting bolt in the adjacent previous-level limiting device, and the other end of the limiting steel plate is fixedly connected to the limiting steel plate in the adjacent next-level limiting device through the limiting bolt in the adjacent next-level limiting device.
[0006] Among them: the contact surfaces of the other end of the limiting steel plate in the first level limiting device, the other end of the limiting steel plate in the last level limiting device, and both ends of the limiting steel plates in other levels of limiting devices are all inclined surfaces.
[0007] When there are two groups of limit devices, the two groups of limit devices are symmetrically arranged on both sides of the axial section of the middle steel liner; when there are more than two groups of limit devices, each group of limit devices is evenly arranged along the circumferential direction of the middle steel liner.
[0008] The axial center lines of the limiting bolts in each level of the limiting device are in the vertical direction and are parallel to the axial center lines of the multi-level horizontal shear force friction pendulum seismic isolation bearings.
[0009] The bottom surface of the middle steel liner is always located below the lower surface of the limiting steel plate in the last level limiting device in the initial state and when the multi-level horizontal shear force friction pendulum seismic isolation bearing bears the earthquake force.
[0010] A flat slide plate is provided between the upper surface of the spherical crown lining and the upper support plate. The upper surface of the spherical crown lining is flat and is provided with a flat slide plate groove. The lower surface of the spherical crown lining is spherical. The upper surface of the flat slide plate is connected to the upper support plate. The lower part of the flat slide plate is accommodated in the flat slide plate groove and is slidably connected to the spherical crown lining.
[0011] The upper and lower surfaces of the middle steel lining are both spherical, and are both provided with spherical slide plate grooves. An upper spherical slide plate is provided between the upper surface of the middle steel lining and the spherical crown lining. The upper and lower surfaces of the upper spherical slide plate are both spherical, and the upper surface of the upper spherical slide plate is connected to the lower surface of the spherical crown lining. The lower part of the upper spherical slide plate is accommodated in the spherical slide plate groove on the upper surface of the middle steel lining and is slidably connected to the middle steel lining; a lower spherical slide plate is provided between the lower surface of the middle steel lining and the lower support plate. The upper and lower surfaces of the lower spherical slide plate are both spherical, and the lower surface of the lower spherical slide plate is connected to the lower support plate. The upper part of the lower spherical slide plate is accommodated in the spherical slide plate groove on the lower surface of the middle steel lining and is slidably connected to the middle steel lining.
[0012] The advantages and positive effects of the utility model are:
[0013] The utility model can provide graded protection for the bridge system according to different levels of sudden force (seismic force); when subjected to a smaller primary sudden force (seismic force), the primary limiting device is destroyed, stress is released, and a primary isolation displacement is generated to dissipate energy; when subjected to a larger secondary sudden force (seismic force), both the primary and secondary limiting devices are destroyed, stress is released in stages, and after the primary isolation displacement is generated, a secondary isolation displacement is generated to dissipate energy, thereby playing a multi-level protection role for the bridge system under different stress states. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural sectional view of the utility model;
[0015] Figure 2 for Figure 1 A partial enlarged view of the middle level limit device (A);
[0016] Figure 3 for Figure 1 A partial enlarged view of the middle secondary limit device (B);
[0017] Among them: 1 is an upper support plate, 2 is a flat slide plate, 3 is a spherical crown lining plate, 4 is an upper spherical slide plate, 5 is an intermediate steel lining plate, 6 is a secondary limiting device, 7 is a primary limiting device, 8 is a lower spherical slide plate, 9 is a lower support plate, 10 is a primary limiting bolt, 11 is a primary limiting steel plate, 12 is a secondary limiting steel plate, and 13 is a secondary limiting bolt. DETAILED DESCRIPTION
[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0019] like Figures 1 to 3 As shown, the utility model comprises an upper support plate 1 and a lower support plate 9, wherein a spherical crown lining plate 3 and an intermediate steel needle plate 5 are respectively arranged between the upper support plate 1 and the lower support plate 9 from top to bottom, wherein the upper surface of the spherical crown lining plate 3 is connected to the upper support plate 1 in a plane sliding manner, the lower surface of the spherical crown lining plate 3 is connected to the upper surface of the intermediate steel lining plate 5 in a spherical sliding manner, and the lower surface of the intermediate steel lining plate 5 is connected to the lower support plate 9 in a spherical sliding manner; at least two groups of limiting device groups are arranged between the intermediate steel lining plate 5 and the lower support plate 9, wherein each group of limiting device groups has a multi-stage limiting device, wherein each stage of the limiting device comprises a limiting bolt and a limiting steel plate, wherein one end of the limiting steel plate in the first stage limiting device is connected to the intermediate steel lining plate 5, and the other end is fixedly connected to the limiting steel plate in the next-level limiting device through the limiting bolt in the first-level limiting device; one end of the limiting steel plate in the last-level limiting device is fixedly connected to the lower support plate 9, and the other end is fixedly connected to the limiting steel plate in the last-level limiting device through the limiting bolt in the last-level limiting device; in the limiting device between the first-level limiting device and the last-level limiting device, one end of the limiting steel plate is fixedly connected to the limiting steel plate in the adjacent last-level limiting device through the limiting bolt in the adjacent last-level limiting device, and the other end of the limiting steel plate is fixedly connected to the limiting steel plate in the adjacent next-level limiting device through the limiting bolt in the adjacent next-level limiting device.
[0020] The contact surfaces of the other end of the limiting steel plate in the first level limiting device, the other end of the limiting steel plate in the last level limiting device, and both ends of the limiting steel plates in other levels of limiting devices are all inclined surfaces. The axial centerline of the limiting bolts in each level of limiting device is in the vertical direction and is parallel to the axial centerline of the multi-level horizontal shear force friction pendulum seismic isolation bearing.
[0021] When there are two groups of limit devices, the two groups of limit devices are symmetrically arranged on both sides of the axial section of the middle steel liner 5; when there are more than two groups of limit devices, each group of limit devices is evenly arranged along the circumferential direction of the middle steel liner 5.
[0022] The bottom surface of the middle steel lining plate 5 is always located below the lower surface of the limiting steel plate in the last limiting device in the initial state and when the multi-level horizontal shear force friction pendulum isolation bearing is subjected to seismic force, so as to ensure that the limiting steel plate in the last limiting device limits the middle steel lining plate 5.
[0023] The present embodiment has two groups of limit device groups, each group of limit device groups has two levels of limit devices, namely, a primary limit device 7 and a secondary limit device 6. The primary limit device 7 includes a primary limit bolt 10 and a primary limit steel plate 11, and the secondary limit device 6 includes a secondary limit bolt 13 and a secondary limit steel plate 12. The axial cross-section of the primary limit steel plate 11 is an "L" shape rotated 90° counterclockwise, one side of the "L" shape (one end of the primary limit steel plate 11) is fixed to the outer side surface of the middle steel liner 5, and the lower surface of the other side of the "L" shape (the other end of the primary limit steel plate 11) is an inclined surface. The upper surface of one end of the secondary limit steel plate 12 is an inclined surface, and the lower surface of the other end is an inclined surface; the upper surface of the lower support plate 9 is a spherical surface. When connected, the inclined surface at one end of the secondary limiting steel plate 12 abuts against the inclined surface at the other end of the primary limiting steel plate 11 and is fixedly connected by the primary limiting bolt 10; the inclined surface at the other end of the secondary limiting steel plate 12 is fixedly connected to the edge of the spherical surface of the lower support plate 9 by the secondary limiting bolt 13.
[0024] In this embodiment, a flat slide plate 2 is provided between the upper surface of the spherical crown lining plate 3 and the upper support plate 1. The upper surface of the spherical crown lining plate 3 is flat and is provided with a flat slide plate groove, and the lower surface of the spherical crown lining plate 3 is a spherical surface; the upper surface of the flat slide plate 2 is connected to the upper support plate 1, and the lower part of the flat slide plate 2 is accommodated in the flat slide plate groove and is slidably connected to the spherical crown lining plate 3.
[0025] In the present embodiment, the upper and lower surfaces of the middle steel lining plate 5 are both spherical, and are both provided with spherical slide plate grooves. An upper spherical slide plate 4 is provided between the upper surface of the middle steel lining plate 5 and the spherical crown lining plate 3. The upper and lower surfaces of the upper spherical slide plate 4 are both spherical, and the upper surface of the upper spherical slide plate 4 is connected to the lower surface of the spherical crown lining plate 3. The lower part of the upper spherical slide plate 4 is accommodated in the spherical slide plate groove on the upper surface of the middle steel lining plate 5 and is slidably connected to the middle steel lining plate 5; a lower spherical slide plate 8 is provided between the lower surface of the middle steel lining plate 5 and the lower support plate 9. The upper and lower surfaces of the lower spherical slide plate 8 are both spherical, and the lower surface of the lower spherical slide plate 8 is connected to the lower support plate 9. The upper part of the lower spherical slide plate 8 is accommodated in the spherical slide plate groove on the lower surface of the middle steel lining plate 5 and is slidably connected to the middle steel lining plate 5.
[0026] The working principle of the utility model is:
[0027] The utility model can not only realize the temperature-dependent displacement function of the bridge under the action of conventional temperature-dependent forces, but also can cut different limit devices according to different sudden changes (seismic forces) when sudden changes (seismic forces) such as earthquakes occur, and produce different seismic reduction and isolation displacements, thereby realizing multi-level protection of the bridge system. Specifically:
[0028] In the initial state, the multi-stage horizontal shear force friction pendulum seismic isolation bearing does not bear shear force, and the first-stage limit steel plate 11 and the second-stage limit steel plate 12 are fixedly connected by the first-stage limit bolt 10, and the first-stage limit steel plate 11 is in direct contact with the middle rigid lining plate 5 to limit the seismic isolation displacement of the multi-stage horizontal shear force friction pendulum seismic isolation bearing. When the multi-stage horizontal shear force friction pendulum seismic isolation bearing bears a sudden force (seismic force) exceeding the first-stage shear force, the first-stage limit bolt 10 is damaged and sheared, and the middle rigid lining plate 5 carries the first-stage limit steel plate 11 to jointly generate the first-stage seismic isolation displacement, thereby consuming the energy of the smaller first-stage sudden force (seismic force).
[0029] When the multi-stage horizontal shear force friction pendulum seismic isolation bearing is subjected to a smaller sudden force (seismic force) that exceeds the primary shear force but is less than the secondary shear force, the primary limiting device 7 is destroyed and the secondary limiting steel plate 12 fixed on the lower support plate 9 limits the middle rigid lining plate 5, thereby consuming energy of the sudden force (seismic force) and ensuring that the seismic isolation displacement of the multi-stage horizontal shear force friction pendulum seismic isolation bearing does not exceed the primary isolation displacement.
[0030] When the multi-stage horizontal shear force friction pendulum seismic isolation bearing is subjected to a larger sudden force (seismic force) exceeding the secondary shear force, first, the primary limiting device 7 is destroyed, and a primary seismic isolation displacement is generated to dissipate energy; when the displacement exceeds the primary seismic isolation displacement, the secondary limiting steel plate 12 fixed to the lower support plate 9 by the secondary limiting bolts 13 contacts the middle rigid lining plate 5, and the secondary limiting bolts 13 bear the sudden force (seismic force) at this time; when the secondary limiting bolts 13 are sheared and destroyed, a secondary seismic isolation displacement will be generated, thereby dissipating the larger secondary sudden force (seismic force).
[0031] This description only illustrates the working principle of the multi-stage horizontal shear force friction pendulum seismic isolation bearing through the illustrated structure. The multi-stage horizontal shear force structure of the limiting (fuse) device of the friction pendulum seismic isolation bearing with other structures is also within the protection scope of this patent. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field. Although the utility model is described in detail with reference to the aforementioned embodiments, for technical personnel in this field, it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A multi-stage horizontal shear force friction pendulum seismic isolation bearing, comprising an upper bearing plate (1) and a lower bearing plate (9), Features: A spherical crown lining plate (3) and an intermediate steel lining plate (5) are respectively provided between the upper support plate (1) and the lower support plate (9); the upper surface of the spherical crown lining plate (3) is connected to the upper support plate (1) in a planar sliding manner, the lower surface of the spherical crown lining plate (3) is connected to the upper surface of the intermediate steel lining plate (5) in a spherical sliding manner, and the lower surface of the intermediate steel lining plate (5) is connected to the lower support plate (9) in a spherical sliding manner; at least two groups of limiting device groups are provided between the intermediate steel lining plate (5) and the lower support plate (9), each group of the limiting device groups has multiple levels of limiting devices, each level of the limiting device includes a limiting bolt and a limiting steel plate, one end of the limiting steel plate in the first level of the limiting device is connected to the intermediate steel lining plate (5) One end of the limiting steel plate in the last limiting device is fixed to the lower support plate (9), and the other end is fixed to the limiting steel plate in the last limiting device through the limiting bolt in the last limiting device; in the limiting device between the first limiting device and the last limiting device, one end of the limiting steel plate is fixed to the limiting steel plate in the adjacent last limiting device through the limiting bolt in the adjacent last limiting device, and the other end of the limiting steel plate is fixed to the limiting steel plate in the adjacent next limiting device through the limiting bolt in the adjacent next limiting device.
2. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: The contact surfaces of the other end of the limiting steel plate in the first-level limiting device, the other end of the limiting steel plate in the last-level limiting device, and both ends of the limiting steel plates in the other levels of limiting devices are all inclined surfaces.
3. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: When there are two groups of the limiting device, the two groups of the limiting device are symmetrically arranged on both sides of the axial section of the middle steel liner (5); when there are more than two groups of the limiting device, each group of the limiting device is evenly arranged along the circumferential direction of the middle steel liner (5).
4. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: The axial center lines of the limiting bolts in each level of the limiting device are in the vertical direction and are parallel to the axial center lines of the multi-level horizontal shear force friction pendulum seismic isolation bearings.
5. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: The bottom surface of the middle steel lining plate (5) is always located below the lower surface of the limiting steel plate in the last level limiting device in the initial state and when the multi-level horizontal shear force friction pendulum seismic isolation support bears earthquake force.
6. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: A plane slide plate (2) is provided between the upper surface of the spherical crown lining plate (3) and the upper support plate (1); the upper surface of the spherical crown lining plate (3) is plane and is provided with a plane slide plate groove; the lower surface of the spherical crown lining plate (3) is spherical; the upper surface of the plane slide plate (2) is connected to the upper support plate (1); the lower part of the plane slide plate (2) is accommodated in the plane slide plate groove and is slidably connected to the spherical crown lining plate (3).
7. The multi-stage horizontal shear force friction pendulum seismic isolation bearing according to claim 1, Features: The upper and lower surfaces of the intermediate steel lining plate (5) are both spherical and are both provided with spherical slide plate grooves. An upper spherical slide plate (4) is provided between the upper surface of the intermediate steel lining plate (5) and the spherical crown lining plate (3). The upper and lower surfaces of the upper spherical slide plate (4) are both spherical. The upper surface of the upper spherical slide plate (4) is connected to the lower surface of the spherical crown lining plate (3). The lower part of the upper spherical slide plate (4) is accommodated in the spherical slide plate groove on the upper surface of the intermediate steel lining plate (5) and is slidably connected to the intermediate steel lining plate (5). A lower spherical slide plate (8) is provided between the lower surface of the intermediate steel lining plate (5) and the lower support plate (9). The upper and lower surfaces of the lower spherical slide plate (8) are both spherical. The lower surface of the lower spherical slide plate (8) is connected to the lower support plate (9). The upper part of the lower spherical slide plate (8) is accommodated in the spherical slide plate groove on the lower surface of the intermediate steel lining plate (5) and is slidably connected to the intermediate steel lining plate (5).