CN114990994B - Bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting - Google Patents
Bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting Download PDFInfo
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- CN114990994B CN114990994B CN202210869221.7A CN202210869221A CN114990994B CN 114990994 B CN114990994 B CN 114990994B CN 202210869221 A CN202210869221 A CN 202210869221A CN 114990994 B CN114990994 B CN 114990994B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting, which comprises a plurality of damping units, wherein the damping units are arranged on one sides of a main beam and a pier top support in an inclined state through mounting seats and pin shafts respectively; the lower steel plate and the upper steel plate are arranged orthogonally, the intersecting section of one steel plate is embedded with a plurality of energy dissipation blocks along the length direction, and the intersecting section of the other steel plate clamps all the energy dissipation blocks and is connected with the energy dissipation blocks through fasteners; the upper ends of the intersecting sections of the two are locked by a fastener after being connected by a guy cable. The whole device is of a chain structure, the energy dissipation blocks are attached to the wall of the embedded hole and pressed tightly when a small earthquake occurs, the axial direction of the device is pulled or pressed to limit the displacement of the beam body, and the stay cable is pulled to extend. After the earthquake is finished, resetting through the stay cable. When a large earthquake occurs, the energy dissipation blocks are bent one by one to be damaged to consume earthquake energy, and the energy dissipation blocks continue to consume the earthquake energy through the tensile deformation of the lower steel plate and the upper steel plate after being damaged.
Description
Technical Field
The invention belongs to a bridge damping device, and particularly relates to a bridge assembly type shock absorption and isolation device capable of dissipating energy stage by stage through lock catch limiting.
Background
With the continuous development of building earthquake-resistant technology, at present, earthquake reduction and isolation devices commonly used for buildings and bridge structures are provided with earthquake reduction and isolation supports, dampers and the like. Common seismic mitigation and isolation supports comprise lead core rubber supports, high-damping rubber supports, friction pendulum supports and the like. Commonly used dampers are steel dampers, fluid viscous dampers, etc.
The working principle of the seismic isolation and reduction technology mainly comprises two steps: one is that the bearers are usually connected in series with the coping piers above and below the superstructure (main girders, etc.) in the structure. The seismic isolation and reduction device has smaller rigidity (post-flexion rigidity). The integral rigidity after the series connection structure is close to a small value in value, so that the structural system becomes flexible, a high-frequency area of seismic energy is avoided, and the structural seismic response is reduced; and secondly, the seismic isolation and reduction device dissipates the seismic input energy through plastic work-applying energy dissipation or viscous damping energy dissipation.
In particular implementations, less stiffness is typically achieved with rubber. Compared with steel and concrete, rubber has smaller elastic modulus and shear modulus. The rubber is overlapped in multiple layers or overlapped with the steel plate, so that the device is low in rigidity. The energy consumption capacity is realized by the external force function of rubber or steel entering the plasticity stage. Or through viscous damping of some liquid. And part of the shock absorption and isolation devices directly utilize friction force to do work to consume energy.
In addition to the purpose of achieving seismic isolation, seismic isolation devices must not affect other capabilities of the structure. Such as meeting the requirements of the structure in normal use stage, durability, construction and the like. Including and not limited to bearing a designed dead load, ease of installation, no impact on construction, etc.
Therefore, the seismic isolation and reduction device can absorb seismic energy, reduce seismic hazard, is an important development direction in the aspect of building seismic resistance, and is an engineering technical product which is urgently needed for bridge structure seismic resistance.
Disclosure of Invention
The invention aims to provide a bridge assembly type seismic isolation and reduction device which is convenient to install and replace and can absorb larger seismic energy to protect the safety of a bridge.
The invention provides a bridge assembly type shock absorption and isolation device capable of dissipating energy in stages through lock catch limiting, which adopts the technical scheme that: the damping device comprises a plurality of damping units, a plurality of damping units and a plurality of damping units, wherein the damping units are arranged on one sides of a main beam and a pier top support in an inclined state through mounting seats and pin shafts respectively; the lower steel plate and the upper steel plate are arranged orthogonally, the intersecting section of one steel plate is embedded with a plurality of energy dissipation blocks along the length direction, and the intersecting section of the other steel plate clamps all the energy dissipation blocks and is connected with the energy dissipation blocks through fasteners; the upper ends of the intersecting sections of the lower steel plate and the upper steel plate are locked by fasteners after being connected by inhaul cables.
In one embodiment of the above technical solution, the lower steel plate and the upper steel plate are arranged with one of the steel plates being located on the center plane of the width side of the other steel plate, wherein the intersecting section of the lower steel plate is provided with a plurality of mounting holes for embedding the energy dissipation blocks, the intersecting section of the upper steel plate is provided with rectangular grooves for clamping the lower steel plate and the energy dissipation blocks, and the plate bodies on both sides of the rectangular grooves are symmetrically provided with fastener mounting holes for connecting the energy dissipation blocks.
In one embodiment of the above technical solution, the thickness of the lower steel plate and the upper steel plate is at least 10mm.
In one embodiment of the above technical scheme, the number of the energy dissipation blocks is four, one of the energy dissipation blocks is higher than the other three energy dissipation blocks, the energy dissipation blocks are rectangular blocks with top surfaces being concave arc surfaces, and the concave arc surfaces are arranged along the thickness direction of the energy dissipation blocks.
In an embodiment of the above technical scheme, the mounting hole for embedding the energy dissipation block is a rectangular hole with an upper concave arc surface on the upper side, and the upper concave arc surface is arranged along the width direction of the rectangular hole.
In one embodiment of the above technical solution, the energy dissipation blocks with a large height are embedded in the rectangular holes at the lowest position, and the upper concave arc surface of each rectangular hole is orthogonally arranged with the lower concave arc surface of the corresponding energy dissipation block.
In an embodiment of the above technical scheme, the width direction both sides of upper portion steel sheet correspond the nearly top symmetry of rectangular channel sets up the connecting block, the crossing section upper end bilateral symmetry of lower part steel sheet is stretched out, stretches out section and connecting block time installation the cable.
In an embodiment of the foregoing technical solution, the inhaul cable is an SMA cable.
In an embodiment of the above technical scheme, the lower end of the lower steel plate is provided with a round hole penetrating through the thickness of the lower steel plate for installing the pin shaft, the upper end of the upper steel plate is provided with an installation plate located on the center plane of the upper steel plate in the width direction, and the top of the installation plate is provided with a round hole penetrating through the thickness of the installation plate for installing the pin shaft.
In an embodiment of the above technical scheme, the damping units are arranged in a left-right sequence, and are fixed with the bridge pier and the main beam through mounting seats and fasteners at two ends respectively, and a connecting plate is arranged between the upper steel plate and the lower steel plate of each adjacent damping unit respectively.
According to the invention, a plurality of energy dissipation blocks are embedded in the lower steel plate of the damping unit, the upper steel plate and the lower steel plate are arranged orthogonally, the energy dissipation blocks are connected through fasteners after the lower steel plate and the energy dissipation blocks are clamped by the intersecting sections, so that the whole device forms a chain type structure, and the upper ends of the intersecting sections of the lower steel plate and the upper steel plate are also connected with the inhaul cable. When the main beam and the pier top support base slide in space in small earthquake, the concave circular ring surface of the energy dissipation block is attached and pressed with the concave circular arc surface of the rectangular hole in the lower steel plate, and the device is axially pulled or pressed to limit the displacement of the beam body. In addition, when a small earthquake occurs, the stay cable is stretched in a tensioned mode, after the earthquake is ended, the stay cable can return to the original position, meanwhile, the device is pulled to return to the original position, and the self-resetting function can be achieved. When a large earthquake occurs, the top surface of the energy consumption block is in contact with and pressed against the hole wall of the embedding hole of the energy consumption block, the whole damping unit is pulled to limit the displacement of the beam body, the energy consumption blocks are bent one by one to destroy and consume earthquake energy along with the increase of the earthquake, and if the energy consumption blocks are destroyed and the earthquake still occurs, the earthquake energy is continuously consumed through the tensile deformation of the lower steel plate and the upper steel plate. Because the lower steel plate and the upper steel plate are both thick steel plates, after the energy dissipation block is damaged, the lower steel plate and the upper steel plate are connected through the high-strength bolt, the thickness of the steel plates and the strength of the bolt can be selected through preset seismic energy, so that the safety of the pier and the main beam can be ensured through the deformation energy dissipation of the steel plates and the bolt during an earthquake, and the shock absorption and isolation effects are achieved. When repairing after earthquake, if only the energy consumption block is damaged, the high-strength bolt between the upper steel plate and the energy consumption block is detached to separate the upper steel plate from the lower steel plate, then the damaged energy consumption block is taken down to be replaced by a new one, and then the energy consumption block is reassembled and fixed on the upper steel plate. If the lower steel plate and the upper steel plate need to be replaced, the pin shafts at the two ends of the damping unit are dismounted, and the other structural integral parts of the damping unit are dismounted to directly replace new integral parts, so that the damping unit can be quickly repaired.
Drawings
Fig. 1 is a schematic structural view of a shock-absorbing unit according to an embodiment of the present invention.
Fig. 2 is a side view of fig. 1 (hinge mount and rotatable support not shown).
Fig. 3 is an enlarged schematic view of a lower steel plate in fig. 1.
Fig. 4 is an enlarged structural schematic view of an integral piece of the upper steel plate, the connecting block and the mounting plate in fig. 2.
Fig. 5 is a schematic view of the usage state of the present embodiment.
Fig. 6 is a right side view of fig. 5.
Detailed Description
As shown in fig. 1, in the bridge assembly type seismic isolation and reduction device for limiting and dissipating energy by stages through the lock catch disclosed by the embodiment, the damping unit comprises a lower steel plate 1, an upper steel plate 2, a higher energy dissipating block 3, a lower energy dissipating block 4, a guy cable 5, a mounting plate 6, a pin 7 and a mounting seat 8.
The lower steel plate 1 and the upper steel plate 2 have the same thickness and width, and are at least 10mm. In this embodiment, a single higher energy dissipating block 3 and three shorter energy dissipating blocks 4 are provided, each of which is provided with a circular hole extending through the thickness thereof.
Lower part steel sheet 1 and upper portion steel sheet 2 are to the quadrature to be arranged, and the crossing section of lower part steel sheet 1 sets up four rectangular holes 11 that are used for inlaying the dress in the power consumption piece, and the top surface of rectangular hole is the circular arc face of going up the concavity, and the height that highly is greater than other three rectangular holes of lowest rectangular hole. The intersecting section of the upper steel plate 2 is provided with a rectangular groove 21 for clamping the lower steel plate 1 and all energy dissipation blocks, and the plate bodies on the two sides of the rectangular groove are symmetrically arranged in four round holes for connecting fasteners of the energy dissipation blocks. The fastener in this embodiment is a high-strength bolt equipped with a high-strength nut.
The higher energy dissipation block 3 and the shorter energy dissipation block 4 are rectangular blocks of which the top surfaces are concave arc surfaces, and the height of the higher energy dissipation block 3 is larger than that of the shorter energy dissipation block 4.
The upper steel plate 2 is symmetrically welded with connecting blocks 22 corresponding to the two sides of the rectangular groove 21 near the upper side. There is the symmetrical section that stretches out in the upper end width direction both sides of lower part steel sheet 1, and the connecting block 22 sets up the same round hole respectively with the relevant position of the section that stretches out for installation cable 5.
The lower end of the lower steel plate 1 is provided with a circular hole penetrating the thickness thereof. The upper end of the upper steel plate 1 is welded with a mounting plate 6 perpendicular to the width direction, and the top of the mounting plate is provided with a round hole penetrating through the thickness of the mounting plate. The two round holes are respectively used for installing the pin shaft 7, and the diameter of each round hole is larger than the outer diameter of the pin shaft.
The pin shaft 7 is a high-strength T-shaped shaft, the length of the pin shaft is larger than the thickness of the lower steel plate 1 and the mounting plate 6, and a high-strength nut for limiting is arranged.
The mounting seat 8 is a double-lug plate seat, the pair of lug plates are used for mounting the pin shaft, and the bottom plate is fixedly mounted with the bridge pier and the main beam through fasteners respectively.
In this embodiment, the assembly process of the damping unit is as follows:
the four energy dissipation blocks are respectively embedded in corresponding rectangular holes in the lower steel plate;
the rectangular groove of the upper steel plate clamps the lower steel plate and all the energy dissipation blocks in a centering manner, and then the lower steel plate and the energy dissipation blocks penetrate through the bolts respectively, and the bolts are locked through nuts respectively.
After each energy dissipation block is fixed, the upper concave arc surface of the rectangular hole is orthogonally arranged with the lower concave arc surface of the energy dissipation block.
And connecting and locking the lower steel plate and the upper steel plate through the SMA cables.
And a pin shaft and a mounting seat 8 are respectively arranged at two ends of the assembly integral piece.
After the damping units are assembled, the lower steel plates and the upper steel plates of the three damping units are welded and fixed through the connecting plates 9 respectively to form a damping device. It is of course also possible to weld the yoke plate before assembling the pin and the mounting socket. Other embodiments may determine the number of damping units according to actual needs.
When the damping device is installed on site, all installation bases are fixed according to the designated positions on the bridge pier and the main beam, when the bridge pier and the main beam are prefabricated, the rectangular steel plate with the internal thread sleeve is embedded in the designated positions, and the installation bases are connected and fixed with the internal thread sleeve through the high-strength bolts. After the damping device is installed, the damping device is hinged to one side of the bridge and the pier top supporting seat in an inclined state, as shown in fig. 5 and 6.
The lower steel plate and the upper steel plate of the damping unit of the device are arranged in a centering and orthogonal mode, a plurality of energy dissipation blocks between the crossed sections of the lower steel plate and the upper steel plate are connected through high-strength bolts to form a structure similar to a chain ring buckle, and the whole device can be regarded as an orthogonal long rod limiter and has good tensile property.
The staged damping and energy consumption principle of the device is as follows:
when a small earthquake occurs and the main beam and the pier top support are in spatial sliding, the concave circular ring surface of the energy dissipation block is attached and compressed with the concave circular arc surface of the rectangular hole in the lower steel plate, and the device is axially pulled or pressed to limit the displacement of the beam body. In addition, when a small earthquake occurs, the SMA cable is stretched in a tensile mode, after the earthquake is ended, the SMA cable can return to the original position, meanwhile, the device is pulled to return to the original position, and the self-resetting function can be achieved.
When a large earthquake occurs, the lower concave arc surface of the energy dissipation block is in contact with the upper concave arc surface of the rectangular hole in which the energy dissipation block is embedded and is compressed, the whole damping unit is pulled to limit the displacement of the beam body, the energy dissipation blocks in the rectangular hole are bent one by one along with the increase of the earthquake to consume earthquake energy, and if the energy dissipation blocks are damaged and the earthquake still occurs, the earthquake energy is continuously consumed through the tensile deformation of the lower steel plate and the upper steel plate. Because the lower steel plate and the upper steel plate are both thick steel plates, after the energy dissipation block is damaged, the lower steel plate and the upper steel plate are connected through the high-strength bolt, the thickness of the steel plates and the strength of the bolt can be selected through preset seismic energy, and finally, the safety of the bridge pier and the main beam can be ensured through the deformation energy dissipation of the steel plates and the bolt during an earthquake, so that the seismic isolation and reduction effects are achieved.
When the energy dissipation block is damaged after an earthquake, only the high-strength bolt between the upper steel plate and the energy dissipation block needs to be dismounted to separate the upper steel plate from the lower steel plate, then the damaged energy dissipation block is taken down to be replaced by a new one, and then the energy dissipation block is reassembled and fixed on the upper steel plate. If the lower steel plate and the upper steel plate need to be replaced, the pin shafts at the two ends of the damping unit are detached, and the other structural integral parts of the damping unit are detached to directly replace new integral parts, so that the damping unit can be quickly repaired.
Claims (6)
1. The utility model provides a spacing bridge assembled of consuming energy stage by stage through hasp subtracts isolation device which characterized in that:
the device comprises a plurality of damping units, wherein the damping units are arranged on one sides of a main beam and a pier top support seat in an inclined state through a mounting seat and a pin shaft respectively, and each damping unit comprises a lower steel plate, an upper steel plate and an energy dissipation block;
the lower steel plate and the upper steel plate are arranged orthogonally, the intersecting section of one steel plate is embedded with a plurality of energy dissipation blocks along the length direction, and the intersecting section of the other steel plate clamps all the energy dissipation blocks and is connected with the energy dissipation blocks through fasteners;
the upper ends of the intersecting sections of the lower steel plate and the upper steel plate are connected through a stay cable and then locked through a fastener;
the lower steel plate and the upper steel plate are arranged in a manner that one steel plate is positioned on the central plane of the width side of the other steel plate, wherein the intersecting section of the lower steel plate is provided with a plurality of mounting holes for embedding the energy dissipation blocks, the intersecting section of the upper steel plate is provided with a rectangular groove for clamping the lower steel plate and the energy dissipation blocks, and the plate bodies on the two sides of the rectangular groove are symmetrically provided with fastener mounting holes for connecting the energy dissipation blocks;
the energy dissipation blocks are four, one of the energy dissipation blocks is higher than the other three energy dissipation blocks, the energy dissipation blocks are rectangular blocks of which the top surfaces are concave arc surfaces, and the concave arc surfaces are arranged along the thickness direction of the energy dissipation blocks;
the mounting hole for embedding the energy dissipation block is a rectangular hole with an upper concave arc surface at the upper side, and the upper concave arc surface is arranged along the width direction of the rectangular hole;
the energy dissipation blocks with larger height are embedded in the rectangular holes at the lowest positions, and the upper concave arc surface of each rectangular hole is orthogonally arranged with the lower concave arc surface of the corresponding energy dissipation block.
2. The bridge assembly type seismic isolation and reduction device capable of dissipating energy stage by stage through lock catch limiting as claimed in claim 1, wherein: the thickness of the lower steel plate and the upper steel plate is at least 10mm.
3. The assembled shock absorption and isolation device for the bridge with staged energy consumption through lock catch limiting as claimed in claim 1, wherein: the width direction both sides of upper portion steel sheet correspond the nearly top symmetry of rectangular channel sets up the connecting block, the crossing section upper end bilateral symmetry of lower part steel sheet is stretched out, stretches out section and connecting block time installation the cable.
4. The bridge assembly type seismic isolation and reduction device capable of dissipating energy stage by stage through lock catch limiting as claimed in claim 3, wherein: the inhaul cable is an SMA cable.
5. The bridge assembly type seismic isolation and reduction device capable of dissipating energy stage by stage through lock catch limiting as claimed in claim 1, wherein: the lower extreme of lower part steel sheet is provided with the round hole that runs through its thickness and is used for the installation the round pin axle, the upper end of upper portion steel sheet is provided with the mounting panel that is located its width direction central plane, and the top of mounting panel is provided with the round hole that runs through its thickness and is used for the round pin axle.
6. The assembled shock absorption and isolation device for the bridge with staged energy consumption through lock catch limiting as claimed in claim 1, wherein: the damping units are arranged in a left-right mode and are fixed with the bridge piers and the main beams through mounting seats and fasteners at two ends respectively, and the connecting plates are arranged between the upper steel plates and the lower steel plates of the adjacent damping units respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210869221.7A CN114990994B (en) | 2022-07-22 | 2022-07-22 | Bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210869221.7A CN114990994B (en) | 2022-07-22 | 2022-07-22 | Bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting |
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| Publication Number | Publication Date |
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| CN114990994A CN114990994A (en) | 2022-09-02 |
| CN114990994B true CN114990994B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210869221.7A Active CN114990994B (en) | 2022-07-22 | 2022-07-22 | Bridge assembled seismic isolation and reduction device capable of dissipating energy by stages through lock catch limiting |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4545920B2 (en) * | 2000-12-11 | 2010-09-15 | オイレス工業株式会社 | Seismic isolation system for bridges |
| CN103883008B (en) * | 2014-01-08 | 2016-01-13 | 中国地震局地壳应力研究所 | A kind of shear energy dissipation type Seismic Isolation of Isolation Layer stopping means |
| CN107503283A (en) * | 2017-08-09 | 2017-12-22 | 南昌大学 | Buffering energy-consumption type chain bridge anti-fall girder apparatus and its construction method |
| CN109555009B (en) * | 2019-01-24 | 2023-08-15 | 湖南中腾土木工程技术有限公司 | Support and beam body shock absorption and insulation structure system and application thereof |
| CN112575674B (en) * | 2020-12-16 | 2022-08-02 | 石家庄铁道大学 | Combined multistage three-dimensional anti-seismic bridge limiting device based on BRB technology |
| CN113846767B (en) * | 2021-10-14 | 2022-09-09 | 石家庄铁道大学 | Annular SMA cable-based graded energy-consumption type self-resetting buckling-restrained constraint device and manufacturing method thereof |
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- 2022-07-22 CN CN202210869221.7A patent/CN114990994B/en active Active
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