Flexible anti-beam-falling seismic mitigation and isolation support
The flexible anti-fall beam seismic isolation bearing dissipates energy through the deformation of steel cables, solving the problems of existing bridge bearings in seismic resistance and preventing beam detachment, and achieving a highly efficient seismic isolation effect for bridges.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 尚德科技(安徽)有限公司
- Filing Date
- 2025-05-19
- Publication Date
- 2026-04-24
AI Technical Summary
Existing bridge bearings are generally ineffective in terms of seismic resistance, energy dissipation, and displacement limitation, and are particularly ineffective in preventing bridge detachment during earthquakes.
The flexible anti-fall beam seismic isolation bearing is adopted, which includes components such as upper embedded steel plate, lower seat plate, steel cable and limit bolt. The energy is consumed by the flexible deformation of the steel cable, so as to achieve a flexible connection between the beam and the pier and prevent it from falling off.
It effectively dissipates energy during earthquakes, prevents beam collapse, improves the seismic performance of bridges, and enhances the seismic resistance of supports.
Smart Images
Figure CN224160970U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road and bridge engineering technology, and in particular to a flexible anti-fall beam and seismic isolation bearing. Background Technology
[0002] As a functional component of a bridge, bearings must adapt to the various movements that occur during bridge use. In addition to longitudinal displacement caused by linear temperature changes, bridge movements are also caused by nonlinear temperature changes, concrete shrinkage and creep, vehicle loads, wind loads, earthquakes, and other factors, resulting in transverse displacement, horizontal rotation displacement, vertical rotation displacement, and lateral rotation displacement. In particular, the instantaneous swaying motion generated during earthquakes places higher demands on the bearings' seismic resistance, energy dissipation, and displacement limitation. The performance of existing bearings is generally poor, and improvements are needed. Utility Model Content
[0003] The purpose of this utility model is to solve the problems existing in the prior art:
[0004] The existing supports are not very effective and need to be improved.
[0005] A flexible anti-fall beam seismic isolation bearing was proposed.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A flexible anti-fall beam seismic isolation bearing includes an upper embedded steel plate and a lower base plate. An upper connecting seat is fixedly installed on the lower end face of the upper embedded steel plate, and a slot is opened on the lower end face of the upper connecting seat. A lower connecting seat is fixedly installed on the upper end face of the lower base plate. The lower base plate and the lower connecting seat are either separate or integrated structures. The dimensions of the lower connecting seat and the slot are matched. A spherical sliding plate is installed on the upper surface of the lower connecting seat. A spherical crown liner is installed on the upper surface of the spherical sliding plate. An upper flat sliding plate is installed on the upper surface of the spherical crown liner. An upper pressure plate is fixed on one side of the lower end face of the upper embedded steel plate, and a lower pressure plate is fixed on one side of the upper end face of the lower base plate. Multiple steel cables are installed between the upper pressure plate and the lower pressure plate. The steel cables are a closed flexible structure.
[0008] As a further technical solution of this utility model, the upper surface of the lower connecting seat is provided with a mounting groove for use with the spherical sliding plate.
[0009] As a further technical solution of this utility model, the upper surface of the spherical crown liner is provided with a mounting groove II for use with the upper flat sliding plate.
[0010] As a further technical solution of this utility model, multiple through slots are provided on the side walls of the upper pressure plate and the lower pressure plate, and each steel cable moves through the corresponding through slot.
[0011] As a further technical solution of this utility model, the lower end face of the upper pre-embedded steel plate is provided with multiple upper beam bottom bolts, and the corresponding upper beam bottom bolts penetrate the upper pressure plate.
[0012] As a further technical solution of this utility model, the upper end face of the lower seat plate is provided with a plurality of lower pier top bolts, and the corresponding lower pier top bolts penetrate the lower pressure plate.
[0013] As a further technical solution of this utility model, the upper end face of the upper pre-embedded steel plate is fixed with multiple upper beam bottom sleeves, and the lower end face of the lower seat plate is fixed with multiple lower pier top anchors.
[0014] As a further technical solution of this utility model, when the lower base plate and the lower connecting seat are a split structure, a lower flat slide plate is provided between the lower base plate and the lower connecting seat. The lower end face of the lower connecting seat is provided with an installation groove 3 for use with the lower flat slide plate. Multiple lower limit bolts are provided through the bottom of the lower base plate, and the threaded end of each lower limit bolt is threaded through into the lower connecting seat.
[0015] The beneficial effects of this utility model are:
[0016] During an earthquake, when the seismic isolation bearing is subjected to a large horizontal force, the lower limit bolt between the lower bearing plate and the lower connecting seat will break, releasing the seismic load. Sliding will occur between the beam and the pier. At this time, the steel cable will flexibly connect the upper embedded steel plate embedded in the beam and the lower bearing plate fixed to the top of the pier. The steel cable will deform, consume energy, and play the role of seismic isolation and preventing the beam from falling off. Attached Figure Description
[0017] Figure 1 This is a schematic diagram showing the connection between the lower seat plate and the lower pressure plate of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of the lower pressure plate of this utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of Embodiment 2 of this utility model.
[0021] In the diagram: 1. Upper embedded steel plate; 2. Lower seat plate; 3. Upper connecting seat; 4. Lower connecting seat; 5. Spherical sliding plate; 6. Spherical crown liner; 7. Upper plane sliding plate; 8. Upper pressure plate; 9. Lower pressure plate; 10. Steel cable; 11. Through slot; 12. Bottom bolt of upper beam; 13. Top bolt of lower pier; 14. Bottom sleeve of upper beam; 15. Top anchor of lower pier; 16. Lower plane sliding plate; 17. Lower limit bolt. Detailed Implementation
[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0023] Example 1
[0024] Reference Figures 1-3 A flexible anti-fall beam vibration isolation support includes an upper embedded steel plate 1 and a lower base plate 2. An upper connecting seat 3 is fixedly installed on the lower end face of the upper embedded steel plate 1, and a slot is opened on the lower end face of the upper connecting seat 3. A lower connecting seat 4 is fixedly installed on the upper end face of the lower base plate 2. The size of the lower connecting seat 4 matches that of the slot. A spherical sliding plate 5 is installed on the upper surface of the lower connecting seat 4. A spherical crown liner 6 is installed on the upper surface of the spherical crown liner 6. An upper flat sliding plate 7 is installed on the upper surface of the spherical crown liner 6. An upper pressure plate 8 is fixed on one side of the lower end face of the upper embedded steel plate 1. A lower pressure plate 9 is fixed on one side of the upper end face of the lower base plate 2. Multiple steel cables 10 are arranged between the upper pressure plate 8 and the lower pressure plate 9. The steel cables 10 are a closed flexible structure.
[0025] The steel cable 10 can be made of any one of steel wire rope, steel strand, or carbon fiber cable. It can adapt to the sliding and rotation between the upper embedded steel plate 1 and the lower seat plate 2. The steel cable 10 has the ability to deform flexibly, avoiding torsional deformation and damage. It has good fatigue resistance and realizes the functions of deformation energy dissipation and beam fall prevention in all directions.
[0026] When the lower base plate 2 and the lower connecting seat 4 are separate structures, a lower flat slide plate 16 is provided between the lower base plate 2 and the lower connecting seat 4. The lower end face of the lower connecting seat 4 is provided with an installation groove 3 for use with the lower flat slide plate 16. Multiple lower limit bolts 17 are provided through the bottom of the lower base plate 2, and the threaded end of each lower limit bolt 17 is threaded through into the lower connecting seat 4.
[0027] When an earthquake occurs and the seismic isolation bearing is subjected to a large horizontal force, the lower limit bolt 17 between the lower seat plate 2 and the lower connecting seat 4 will break, releasing the seismic load. Sliding will occur between the beam and the pier. At this time, the steel cable 10 will flexibly connect the upper embedded steel plate 1 embedded in the beam and the lower seat plate 2 fixed to the top of the pier. The steel cable 10 will deform, consume energy, and play the role of seismic isolation and preventing the beam from falling off.
[0028] The upper surface of the spherical crown liner 6 is provided with a second mounting groove for use with the upper flat slide plate 7, which allows the bridge to slide normally. The upper surface of the lower connecting seat 4 is provided with a first mounting groove for use with the spherical slide plate 5, which allows the bridge to rotate.
[0029] Multiple through slots 11 are provided on the side walls of the upper pressure plate 8 and the lower pressure plate 9. The through slots 11 on the upper pressure plate 8 and the lower pressure plate 9 are symmetrically arranged. Each steel cable 10 is movably passed through the corresponding through slot 11, thereby connecting the upper pressure plate 8 and the lower pressure plate 9 together, and thus flexibly connecting the upper embedded steel plate 1 and the lower seat plate 2 together.
[0030] The lower end face of the pre-embedded steel plate 1 is threaded with multiple upper beam bottom bolts 12. The corresponding upper beam bottom bolts 12 penetrate the upper pressure plate 8. The upper pressure plate 8 is limited and fixed by the upper beam bottom bolts 12.
[0031] The upper end face of the lower seat plate 2 is threaded with multiple lower pier top bolts 13, and the corresponding lower pier top bolts 13 penetrate the lower pressure plate 9. The lower pressure plate 9 is limited and fixed by the lower pier top bolts 13.
[0032] Multiple upper beam bottom sleeves 14 are fixed on the upper end face of the upper pre-embedded steel plate 1. The connection between the beam body and the upper pre-embedded steel plate 1 is achieved through the multiple upper beam bottom sleeves 14. Multiple lower pier top anchors 15 are fixed on the lower end face of the lower seat plate 2. The connection between the lower seat plate 2 and the pier is achieved through the multiple lower pier top anchors 15.
[0033] Example 2
[0034] Reference Figure 4 The difference between this embodiment and embodiment 1 lies in the structural form between the lower seat plate 2 and the lower connecting seat 4. When the lower seat plate 2 and the lower connecting seat 4 are an integral structure, during an earthquake, when the seismic isolation support is subjected to a large horizontal force, after the support limiting guide rail between the upper embedded steel plate 1 and the upper connecting seat 3 is damaged, the upper embedded steel plate 1 and the lower seat plate 2 will be displaced relative to each other, and the steel cable 10 will play the role of shock absorption and preventing beam fall.
[0035] This seismic isolation bearing can be any one of pot bearings, spherical bearings, or friction pendulum bearings, and the bearing type can be any one of fixed type, unidirectional movable type, or multidirectional movable type.
[0036] When this utility model is in use, during an earthquake, when the seismic isolation bearing is subjected to a large horizontal force, the lower limit bolt 17 between the lower seat plate 2 and the lower connecting seat 4 will break, releasing the seismic load. Sliding will occur between the beam and the pier. At this time, the steel cable 10 flexibly connects the upper embedded steel plate 1 embedded in the beam and the lower seat plate 2 fixed to the top of the pier. The steel cable 10 deforms, consumes energy, and plays the role of seismic isolation and preventing the beam from falling off.
[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A flexible anti-fall beam seismic isolation bearing, comprising an upper pre-embedded steel plate (1) and a lower base plate (2), characterized in that, The lower end face of the upper embedded steel plate (1) is fixedly provided with an upper connecting seat (3), and the lower end face of the upper connecting seat (3) is provided with a slot. The upper end face of the lower seat plate (2) is fixedly provided with a lower connecting seat (4). The lower seat plate (2) and the lower connecting seat (4) are a split structure or an integrated structure. The size of the lower connecting seat (4) matches the slot. The upper surface of the lower connecting seat (4) is provided with a spherical sliding plate (5). The upper surface of the spherical sliding plate (5) is provided with a spherical crown liner (6). The upper surface of the spherical crown liner (6) is provided with an upper flat sliding plate (7). One side of the lower end face of the upper embedded steel plate (1) is fixed with an upper pressure plate (8). One side of the upper end face of the lower seat plate (2) is fixed with a lower pressure plate (9). Multiple steel cables (10) are provided between the upper pressure plate (8) and the lower pressure plate (9). The steel cables (10) are closed flexible structures.
2. The flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, The upper surface of the lower connecting seat (4) is provided with a mounting groove for use with the spherical sliding plate (5).
3. The flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, The upper surface of the spherical crown liner (6) is provided with a mounting groove 2 for use with the upper flat sliding plate (7).
4. The flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, Multiple through slots (11) are provided on the side walls of the upper pressure plate (8) and the lower pressure plate (9), and each steel cable (10) moves through the corresponding through slot (11).
5. A flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, The lower end face of the pre-embedded steel plate (1) is threaded with multiple upper beam bottom bolts (12), and the corresponding upper beam bottom bolts (12) penetrate the upper pressure plate (8).
6. The flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, The upper end face of the lower seat plate (2) is threaded with multiple lower pier top bolts (13), and the corresponding lower pier top bolts (13) penetrate the lower pressure plate (9).
7. A flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, The upper end face of the pre-embedded steel plate (1) is fixed with multiple upper beam bottom sleeves (14), and the lower end face of the lower seat plate (2) is fixed with multiple lower pier top anchors (15).
8. A flexible anti-fall beam seismic isolation bearing according to claim 1, characterized in that, When the lower seat plate (2) and the lower connecting seat (4) are separate structures, a lower plane slide plate (16) is provided between the lower seat plate (2) and the lower connecting seat (4). The lower end face of the lower connecting seat (4) is provided with an installation groove for use with the lower plane slide plate (16). Multiple lower limit bolts (17) are provided through the bottom of the lower seat plate (2). The threaded end of each lower limit bolt (17) is threaded through into the lower connecting seat (4).