CN111074750A - Bridge seismic isolation and reduction structure for limiting rotation in main beam surface - Google Patents
Bridge seismic isolation and reduction structure for limiting rotation in main beam surface Download PDFInfo
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- CN111074750A CN111074750A CN201911239838.5A CN201911239838A CN111074750A CN 111074750 A CN111074750 A CN 111074750A CN 201911239838 A CN201911239838 A CN 201911239838A CN 111074750 A CN111074750 A CN 111074750A
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- sliding guide
- seismic isolation
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- longitudinal
- main beam
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- 238000002955 isolation Methods 0.000 title claims abstract description 46
- 230000009467 reduction Effects 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Classifications
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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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a bridge seismic isolation structure for limiting the in-plane rotation of a main beam, which comprises the main beam, a capping beam and a pier, wherein a longitudinal seismic isolation support is arranged between the main beam and the capping beam, a transverse seismic isolation support is arranged between the capping beam and the pier, a longitudinal sliding guide block and a longitudinal limit stop block are arranged on the lower surface of the main beam, and a longitudinal sliding guide groove matched with the longitudinal sliding guide block is arranged on the upper surface of the capping beam, so that the main beam and the capping beam can only move longitudinally and relatively; the transverse sliding guide block and the transverse limit stop block are arranged on the lower surface of the capping beam in an obvious mode, and the transverse sliding guide groove matched with the transverse sliding guide block is arranged on the upper surface of the pier, so that the capping beam and the pier can only move transversely relative to each other. The structure limits the plane rotation of the main beam relative to the bent cap in the seismic isolation and reduction bridge, realizes the separation and the seismic isolation in two horizontal directions, is beneficial to reducing the displacement of the seismic isolation and reduction bridge under the action of an earthquake, protects the safety of the bridge, and has wide application range.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a bridge seismic isolation structure which is suitable for controlling the rotation in a main beam surface of a straight bridge, an inclined bridge and a bent bridge such as a simply supported bridge, a continuous bridge and the like.
Background
In recent years, earthquake (such as Wenchuan earthquake, Yaan earthquake and the like) disasters frequently occur, which cause huge loss to lives and properties of people, and also seriously damage traffic infrastructure in earthquake areas, especially a large number of highway bridges. In order to reduce the damage of the bridge structure under the action of strong earthquake, a novel bridge seismic isolation structure and a novel bridge seismic isolation method are researched, and the enhancement of the seismic performance of the bridge structure is an important technical means for ensuring the safety of people and the smooth traffic under the action of earthquake.
With the continuous construction of buildings and bridge structures, in order to reduce the response of the structure under the action of an earthquake and ensure the safety and reliability of the structure, the seismic isolation and reduction technology is widely applied to actual engineering structures. In a bridge structure, common support forms comprise a lead core rubber support, a high-damping rubber support, a friction pendulum support and the like, the horizontal rigidity of the supports is low, and bending moment and shearing force transmitted to the bottom of a pier by an upper structure can be reduced when an earthquake occurs, so that the purpose of seismic isolation is achieved. However, the small horizontal rigidity of the support can cause overlarge displacement of the upper structure of the bridge, so that the main beam collision, even beam falling and other damages occur. For straight-line, oblique-line simply-supported girder bridges or continuous girder bridges with construction errors or unbalance loading and various simply-supported or continuous bent bridges, the mass center and the rigid center of the upper structure of the bridge often do not coincide in a plane, so that when an earthquake occurs, the bridge often rotates in the plane of a main girder, the horizontal displacement of the upper structure is further increased, and serious consequences are caused.
Therefore, measures are needed to control the rotation of the main beam of the seismic isolation and reduction bridge in a plane.
Disclosure of Invention
In order to control the problem of plane rotation of the upper structure of the bridge when the seismic isolation and reduction technology is used, the invention provides a seismic isolation and reduction structure of the bridge, which limits the plane rotation of a main beam.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
the utility model provides a pivoted bridge subtracts isolation structure in restriction girder face, includes girder, bent cap and pier, the girder is placed on the upper portion of bent cap through vertical shock insulation support, the girder lower surface is provided with longitudinal sliding guide block and vertical limit stop, the cooperation of pegging graft mutually of longitudinal sliding guide block and the longitudinal sliding guide slot that the bent cap upper surface set up, certain distance has between the lateral surface of longitudinal limit stop and bent cap, the bent cap is placed on pier upper portion through horizontal shock insulation support, the bent cap lower surface is provided with lateral sliding guide block and horizontal limit stop, the cooperation of pegging graft mutually of lateral sliding guide block and the lateral sliding guide slot that the pier upper surface set up, certain distance has between the lateral surface of lateral limit stop and pier.
Further, the longitudinal limit stop is respectively arranged at one or two positions according to the position of the main beam at the end support or the middle support.
Furthermore, a certain distance is reserved between the lower surface of the longitudinal sliding guide block and the bottom surface of the longitudinal sliding guide groove.
Furthermore, a polytetrafluoroethylene layer is arranged between the contact surfaces of the longitudinal sliding guide block and the longitudinal sliding guide groove, so that the friction force generated when the longitudinal sliding guide block and the longitudinal sliding guide groove slide relatively is reduced.
Furthermore, a certain distance is reserved between the lower surface of the transverse sliding guide block and the bottom surface of the transverse sliding guide groove.
Furthermore, a polytetrafluoroethylene layer is arranged between the contact surfaces of the transverse sliding guide block and the transverse sliding guide groove, so that the friction force generated when the transverse sliding guide block and the transverse sliding guide groove slide relatively is reduced.
Furthermore, one-way energy dissipation devices are arranged between the main beam and the capping beam and between the capping beam and the pier.
Furthermore, the one-way energy consumption device comprises a viscous fluid damper and a metal damper.
Furthermore, the longitudinal vibration isolation support and the transverse vibration isolation support adopt common vibration isolation supports or vibration isolation supports for limiting one-way displacement.
The invention has the beneficial effects that:
the structure limits the plane rotation of the main beam relative to the bent cap in the seismic isolation and reduction bridge, realizes the separation and the seismic isolation in two horizontal directions, is beneficial to reducing the displacement of the seismic isolation and reduction bridge under the action of an earthquake, protects the safety of the bridge, has wide application range, and can be used for straight-line, oblique-line and curved simply-supported bridge bridges and continuous bridge bridges.
Drawings
FIG. 1 is a longitudinal side elevational view of the present invention at a pier in a continuous beam bridge;
FIG. 2 is a longitudinal side elevational view of the present invention at a simply supported girder bridge pier or a continuous girder bridge pier;
FIG. 3 is a transverse cross-sectional view of section A-A and section B-B of FIG. 1;
FIG. 4 is a longitudinal cross-sectional view of section C-C of FIG. 3;
FIG. 5 is a transverse cross-sectional view of section D-D of FIG. 3;
fig. 6 shows an alternative embodiment of the invention in the longitudinal and transverse sliding direction in a continuous curved bridge.
The reference numbers in the figures illustrate: 1. girder, 2, expansion joint, 3, longitudinal sliding guide block, 4, longitudinal limit stop, 5, longitudinal vibration isolation support, 6, bent cap, 7, longitudinal sliding guide slot, 8, transverse sliding guide block, 9, transverse limit stop, 10, transverse vibration isolation support, 11, pier, 12, transverse sliding guide slot.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 5, a bridge seismic isolation structure for limiting the in-plane rotation of a main beam comprises a main beam 1, a capping beam 6 and a pier 11, wherein the main beam 1 is placed on the upper part of the capping beam 6 through a longitudinal seismic isolation support 5, in the embodiment, a lower bottom plate of the longitudinal seismic isolation support 5 is tightly fixed with the upper surface of the capping beam 6 through bolts, and an upper top plate of the longitudinal seismic isolation support 5 is tightly fixed with the lower surface of the main beam 1 through preset bolts; the lower surface of the main beam 1 is provided with a longitudinal sliding guide block 3 and a longitudinal limit stop 4, in the embodiment, for the middle pier of the continuous beam bridge, the capping beam 6 on the upper part of the middle pier and the main beam 1, the lower surface of the main beam 1 can be provided with two raised longitudinal limit stops 4 which are respectively positioned on two sides of the capping beam 6 along the longitudinal bridge direction; for the bridge pier of the simply supported girder bridge or the side pier of the continuous girder bridge, a raised longitudinal limit stop 4 can be arranged on one side of the lower surface of the main girder 1, which is positioned in the bridge span, the longitudinal limit stop 4 and the capping beam 6 are arranged at a certain distance in the longitudinal direction of the bridge, and the longitudinal sliding guide block 3 and the longitudinal limit stop 4 which are raised on the lower surface of the main girder 1 can be cast in place or prefabricated and assembled with the main girder 1 at the same time; the longitudinal sliding guide block 3 is in inserted fit with a longitudinal sliding guide groove 7 arranged on the upper surface of the cover beam 6, so that the main beam 1 and the cover beam 6 can only generate longitudinal relative displacement, a certain distance is reserved between the longitudinal limit stop 4 and the outer side surface of the cover beam 6, and when the longitudinal relative displacement of the main beam 1 and the cover beam 6 is overlarge, the longitudinal limit stop 4 is in contact with the side surface of the cover beam 6, so that the longitudinal relative displacement of the main beam 1 and the cover beam 6 is prevented from being further increased; the capping beam 6 is placed on the upper portion of the bridge pier 11 through the transverse shock-insulation support 10, in the embodiment, a lower bottom plate of the transverse shock-insulation support 10 is connected with a bolt preset on the upper surface of the bridge pier 11, so that the transverse shock-insulation support 10 is tightly fixed on the upper surface of the bridge pier 11, and an upper top plate of the transverse shock-insulation support 10 is connected with the lower surface of the capping beam 6 through the bolt, so that the upper top plate of the transverse shock-insulation support 10 is tightly fixed with the capping beam 6; the lower surface of the bent cap 6 is provided with a transverse sliding guide block 8 and a transverse limit stop 9, in the embodiment, the transverse sliding guide block 8 and the transverse limit stop 9 which are protruded on the lower surface of the bent cap 6 are I-shaped and consist of one transverse sliding guide block 8 and two transverse limit stops 9, and the transverse sliding guide block 8 and the transverse limit stop 9 which are protruded on the lower surface of the bent cap 6 and the bent cap 6 can be cast in situ or prefabricated and assembled at the same time; the cooperation of pegging graft mutually with the lateral sliding guide slot 12 that 11 upper surfaces of pier set up of lateral sliding guide 8 for the bent cap 6 only can take place lateral relative displacement with pier 11, certain distance has between the lateral surface of lateral limit stop 9 and pier 11, and when bent cap 6 and 11 lateral displacement of pier were too big, lateral limit stop 9 contacted with pier 11, and the further increase of lateral relative displacement between the restriction both guarantees structure safety.
The longitudinal limit stops 4 are respectively arranged at one or two positions according to the position of the main beam 1 at the end support or the middle support.
A certain distance is left between the lower surface of the longitudinal sliding guide block 3 and the bottom surface of the longitudinal sliding guide groove 7.
And a polytetrafluoroethylene layer is arranged between the contact surfaces of the longitudinal sliding guide block 3 and the longitudinal sliding guide groove 7 so as to reduce the friction force when the two slide relatively.
A certain distance is left between the lower surface of the transverse sliding guide block 8 and the bottom surface of the transverse sliding guide groove 12.
And a polytetrafluoroethylene layer is arranged between the contact surfaces of the transverse sliding guide block 8 and the transverse sliding guide groove 12 so as to reduce the friction force when the transverse sliding guide block and the transverse sliding guide groove slide relatively.
Because only one-way relative motion can be generated between the main beam 1 and the capping beam 6 and between the capping beam 6 and the pier 11, the energy-saving device can be combined with one-way energy-consuming devices for use, wherein the one-way energy-consuming devices are arranged between the main beam 1 and the capping beam 6 and between the capping beam 6 and the pier 11.
The one-way energy consumption device comprises a viscous fluid damper and a metal damper.
The longitudinal shock isolation support 5 only can deform longitudinally, the transverse shock isolation support 10 only can deform transversely, and the two supports can adopt common shock isolation supports such as lead core rubber supports and the like and can also adopt shock isolation supports for limiting one-way displacement.
In addition, in the present invention, for a straight simply supported bridge or a continuous bridge, the longitudinal direction means a bridge-following direction, and the transverse direction means a direction orthogonal to the bridge-following direction in a horizontal plane; for a diagonal simply-supported beam bridge or a continuous beam bridge, the longitudinal direction in the main beam plane can be similarly selected, and the transverse direction is the direction orthogonal to the longitudinal direction in the horizontal plane.
For a curved continuous beam bridge, taking fig. 6 as an example, the connecting line direction of the two ends of the main beam 1 of the beam bridge may be taken as a longitudinal direction, the orthogonal direction in the plane is taken as a transverse direction, and the same longitudinal direction and transverse direction are adopted for each support, at this time, although the direction of the relative movement (i.e. transverse direction) of the cap beam 6 and the pier 11 may not be parallel to the direction of the cap beam 6 itself, that is, the direction of the transverse sliding guide block 8 is not consistent with the direction of the cap beam 6 itself, the structure provided by the present invention may also be applied.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a restriction girder internal pivoted bridge subtracts isolation structure, includes girder (1), bent cap (6) and pier (11), its characterized in that, girder (1) is placed on the upper portion of bent cap (6) through vertical shock insulation support (5), girder (1) lower surface is provided with longitudinal sliding guide block (3) and vertical limit stop (4), longitudinal sliding guide block (3) and the cooperation of pegging graft of the longitudinal sliding guide slot (7) that bent cap (6) upper surface set up, certain distance has between the lateral surface of longitudinal limit stop (4) and bent cap (6), bent cap (6) are placed on pier (11) upper portion through horizontal shock insulation support (10), bent cap (6) lower surface is provided with horizontal sliding guide block (8) and horizontal limit stop (9), horizontal sliding guide block (8) and the cooperation of pegging graft of the horizontal sliding guide slot (12) that pier (11) upper surface set up, and a certain distance is reserved between the transverse limit stop (9) and the outer side surface of the pier (11).
2. The structure for damping vibration of a bridge which limits the in-plane rotation of a girder according to claim 1, characterized in that the longitudinal limit stops (4) are provided one or two respectively depending on whether the girder (1) is located at an end support or at an intermediate support.
3. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 1, wherein a certain distance is reserved between the lower surface of the longitudinal sliding guide block (3) and the bottom surface of the longitudinal sliding guide groove (7).
4. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 1 or 3, wherein a polytetrafluoroethylene layer is arranged between the contact surfaces of the longitudinal sliding guide block (3) and the longitudinal sliding guide groove (7) so as to reduce the friction force when the longitudinal sliding guide block and the longitudinal sliding guide groove slide relatively.
5. The bridge seismic isolation structure for limiting the in-plane rotation of the main beam according to claim 1, wherein a certain distance is left between the lower surface of the transverse sliding guide block (8) and the bottom surface of the transverse sliding guide groove (12).
6. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 1 or 5, wherein a polytetrafluoroethylene layer is arranged between the contact surfaces of the transverse sliding guide block (8) and the transverse sliding guide groove (12) so as to reduce the friction force when the transverse sliding guide block and the transverse sliding guide groove slide relatively.
7. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 1, wherein one-way energy dissipation devices are arranged between the main beam (1) and the capping beam (6) and between the capping beam (6) and a pier (11).
8. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 7, wherein the one-way energy dissipation device comprises a viscous fluid damper and a metal damper.
9. The bridge seismic isolation and reduction structure for limiting the in-plane rotation of the main beam according to claim 1, wherein the longitudinal seismic isolation support (5) and the transverse seismic isolation support (10) adopt common seismic isolation and reduction supports or seismic isolation and reduction supports for limiting one-way displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239838.5A CN111074750B (en) | 2019-12-06 | 2019-12-06 | Bridge shock absorption and insulation structure capable of limiting main girder surface inner rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239838.5A CN111074750B (en) | 2019-12-06 | 2019-12-06 | Bridge shock absorption and insulation structure capable of limiting main girder surface inner rotation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111074750A true CN111074750A (en) | 2020-04-28 |
| CN111074750B CN111074750B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911239838.5A Active CN111074750B (en) | 2019-12-06 | 2019-12-06 | Bridge shock absorption and insulation structure capable of limiting main girder surface inner rotation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485483A (en) * | 2020-06-02 | 2020-08-04 | 浙江省交通规划设计研究院有限公司 | Cable-stayed bridge supporting system and cable-stayed bridge |
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|---|---|---|---|---|
| JPH093822A (en) * | 1995-06-16 | 1997-01-07 | Mitsubishi Heavy Ind Ltd | Seismic isolation structure of bridge |
| JP2000054684A (en) * | 1998-08-06 | 2000-02-22 | Taisei Corp | Base isolation device |
| CN101613989A (en) * | 2009-07-16 | 2009-12-30 | 南京工业大学 | What be applied to assembling or prefabricated assembling beam bridge subtracts shock isolation method and structure |
| JP2015222006A (en) * | 2014-04-30 | 2015-12-10 | 首都高速道路株式会社 | Antiseismic structure for bridge |
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| CN207608807U (en) * | 2017-11-29 | 2018-07-13 | 深圳市交运工程集团有限公司 | Packaged type bridges |
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2019
- 2019-12-06 CN CN201911239838.5A patent/CN111074750B/en active Active
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Non-Patent Citations (1)
| Title |
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Cited By (1)
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| CN111485483A (en) * | 2020-06-02 | 2020-08-04 | 浙江省交通规划设计研究院有限公司 | Cable-stayed bridge supporting system and cable-stayed bridge |
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| Publication number | Publication date |
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| CN111074750B (en) | 2024-06-14 |
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