CN108978447A - The method for improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity - Google Patents
The method for improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity Download PDFInfo
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- CN108978447A CN108978447A CN201810715330.7A CN201810715330A CN108978447A CN 108978447 A CN108978447 A CN 108978447A CN 201810715330 A CN201810715330 A CN 201810715330A CN 108978447 A CN108978447 A CN 108978447A
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- doughnut
- steel plate
- shaped steel
- damper
- bridge pier
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of methods for improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity, form a set of anti-seismic strengthening device using steel bushing, doughnut-shaped steel plate, damper and mating connector, are mounted on Precast Concrete Segmental Bridges bridge pier.Method of the invention can effectively promote energy dissipation capacity of the Precast Concrete Segmental Bridges bridge pier under geological process, the embedding reservation member in original structure is not needed, do not need punch etc. the operation for destroying original structure or the work such as redesign and local reinforcement are carried out to original structure yet.
Description
Technical field
The invention belongs to bridge pier energy consumption technical fields, are related to a kind of external damper of utilization and improve Precast Concrete Segmental Bridges bridge
The method of the energy dissipation capacity of pier, specifically, being a kind of to utilize Effects of Viscous Fluid Damper, steel sleeve and cyclic annular steel plate combination
The method of device raising Precast Concrete Segmental Bridges bridge pier energy dissipation capacity under geological process.
Background technique
Since the pier shaft segment of Precast Concrete Segmental Bridges bridge pier is prefabrication, and only connect when on-site consolidation
Seam processing, does not need to carry out large-scale concrete pouring operation, and therefore, Precast Concrete Segmental Bridges bridge pier has reliable in quality, applies
Work is quick, influences small equal many advantages to surrounding enviroment.
Big advantage makes Precast Concrete Segmental Bridges bridge pier become the preferred construction program in the following bridge construction.But
It is that current Precast Concrete Segmental Bridges bridge pier still comes with some shortcomings, especially in terms of anti-seismic performance.Although prefabricated subsection is spelled
Dress bridge pier possesses preferable self-resetting capability under geological process, but its energy dissipation capacity is relatively low, and seam crossing shear resistance is weaker
The problems such as be assembled bridge pier at this stage main deficiency.Meanwhile under geological process, the bottom seam of Precast Concrete Segmental Bridges bridge pier
The continuous opening and closing of meeting, therefore the earthquake displacement demand of Precast Concrete Segmental Bridges bridge pier is also larger.In above-mentioned deficiency, consume energy weaker
Become and restricts the principal element that Precast Concrete Segmental Bridges bridge pier is applied in high-intensity earthquake region.
In order to solve the problems, such as under Precast Concrete Segmental Bridges bridge pier geological process energy dissipation capacity it is weaker this, it is relatively conventional at this stage
Means be to add energy consumption reinforcing bar for Precast Concrete Segmental Bridges bridge pier, it is horizontal come the energy consumption for improving Precast Concrete Segmental Bridges bridge pier with this.
But add energy consumption reinforcing bar the design of Precast Concrete Segmental Bridges bridge pier can be made increasingly complex, need for consume energy reinforcing bar reserving hole channel,
Increase segment manufacture difficulty and assembling construction difficulty.Meanwhile part engineering staff also proposed using damping unit to bridge pier
Seismic hardening is carried out, but most of method using damping unit reinforced bridge pier still rests on theory stage at present.And it is another
A part of method then needs the pre-buried reservation member in pier shaft bottom segment and cushion cap, then carries out the installation of damping unit again.This
Kind method is needed in the installation at least two of bridge pier bottom segment to (4 ~ 8) damping unit.Due to pre-buried a large amount of reservation members, the party
Method even needs to carry out redesigning to the bridge pier reinforced and local reinforcement.
Existing method rises the design complexity of Precast Concrete Segmental Bridges bridge pier and difficulty of construction substantially, even
Some reinforcement means can be such that pier stiffness substantially change, and generation Path of Force Transfer is indefinite, seismic response increasingly complex equal one
A little negative effects.Therefore, in order to promoting Precast Concrete Segmental Bridges bridge pier in high-intensity earthquake region, it would be highly desirable to invent one
Kind can quickly and effectively and the simple method of principle reinforces Precast Concrete Segmental Bridges bridge pier to promote Precast Concrete Segmental Bridges
Energy dissipation capacity of the bridge pier under geological process.
Summary of the invention
It is obvious it is an object of the invention to provide a kind of simple possible effect for the seismic hardening of Precast Concrete Segmental Bridges bridge pier
Reinforcement means, can effectively promote energy dissipation capacity of the Precast Concrete Segmental Bridges bridge pier under geological process.The method of the present invention is not required to
Will in original structure embedding reservation member, do not need punch etc. the operation for destroying original structure yet or weight carried out to original structure
The work such as new design and local reinforcement.
Realize technical solution of the invention are as follows:
A method of Precast Concrete Segmental Bridges bridge pier energy dissipation capacity being improved, using steel bushing, doughnut-shaped steel plate, damper and mating company
Fitting forms a set of anti-seismic strengthening device, is mounted on Precast Concrete Segmental Bridges bridge pier, comprising the following specific steps
Step 1: installing fixed damper bottom support bracket on the doughnut-shaped steel plate that bottom surface is welded with peg；
Step 2: doughnut-shaped steel plate is mounted on cushion cap top surface after cushion cap concreting, and ensure that all pegs are complete
It is inserted into cushion cap top surface concrete；
Doughnut-shaped steel plate, which is mounted on cushion cap top side location, should be located at pier shaft and cushion cap junction, after guaranteeing that pier shaft is assembled, pier shaft
Inside doughnut-shaped steel plate；
When doughnut-shaped steel plate is installed, it should ensure that one of damper bottom support bracket is located at suitable bridge to direction；
Step 3: after pier shaft is assembled, the steel bushing with damper top support is mounted on bottom segment and bottom the
The seam crossing of two segments, it is ensured that firmly install, steel bushing does not slide with pier shaft；
In steel bushing installation process, the damper top support on steel bushing and the damper bottom branch on doughnut-shaped steel plate should ensure that
Seat all alignment；
Step 4: by the bottom fitting of damper and top contact respectively with the damper bottom support bracket and steel bushing on doughnut-shaped steel plate
Damper top support connection on cylinder, and ensure to connect reliable.
Preferably, doughnut-shaped steel plate bottom surface peg is along doughnut-shaped steel plate perimeter welding N circle, N >=1；
Preferably, damper bottom support bracket and doughnut-shaped steel plate are connected by screw bolts；
Preferably, doughnut-shaped steel plate annular diameters should be greater than 5% or more bridge pier pier shaft diameter；
Preferably, steel bushing is made of N valve component, is connected by screw bolts between component, N >=2；
Preferably, this method can provide the Effects of Viscous Fluid Damper of damping force stretching and compressing both direction using 2,
In a damper in along bridge to direction install；
Preferably, the horizontal direction angle between two dampers is 90 ° ~ 135 °.
Preferably, damper after the installation is completed, with pier shaft it is vertical to angle between 30 ° ~ 45 °.
Compared with prior art, the present invention its remarkable advantage are as follows: (1) Precast Concrete Segmental Bridges bridge pier is reinforced using this method,
After steel bushing, doughnut-shaped steel plate are connected with Effects of Viscous Fluid Damper by connector, a set of independent energy-consuming device is formed, is not needed
Preburied component does not need local reinforcement, therefore, does not increase the design complexity and difficulty of construction of former bridge pier；(2) present invention side
Method is connected damper with bridge pier with doughnut-shaped steel plate pedestal using steel bushing, and the damping force of generation only has with hydraulic cylinder speed
It closes, does not give original structure additional stiffness again while consuming a large amount of seismic energies, ensure that original bridge pier in temperature deformation and Xu
Additional stress will not be generated under deformation at a slow speed by becoming etc.；(3) it is reinforced using the present invention, only needs to install two under normal circumstances
Effects of Viscous Fluid Damper, compared with other methods more save the cost；(4) Precast Concrete Segmental Bridges bridge pier, side are reinforced using the method for the present invention
Method is simple, does not increase the complexity of Pier Design, does not change the Path of Force Transfer of original structure；(5) the method for the present invention is using viscous
Stagnant fluid damper provides damping force for bridge pier, and Effects of Viscous Fluid Damper reliable performance, maintenance is convenient, damped coefficient vertically hung scroll
Larger, application range is than wide；(6) the method for the present invention may be used also while improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity
To provide certain position limitation protection effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the method that the present invention improves Precast Concrete Segmental Bridges bridge pier energy dissipation capacity.
Fig. 2 is the doughnut-shaped steel plate schematic diagram for being equipped with damper bottom support bracket.
Fig. 3 is steel bushing component diagram.
Specific embodiment
Below with reference to example and Figure of description, the invention will be further described.
The method of present invention raising Precast Concrete Segmental Bridges bridge pier energy dissipation capacity.As shown in Figure 1, mainly by Precast Concrete Segmental Bridges
Bridge pier, Effects of Viscous Fluid Damper 12, the steel bushing cartridge module 78 with damper top support 9 and have damper bottom support bracket 5
Doughnut-shaped steel plate pedestal 4 form.Bolt is enclosed along perimeter uniform welding N in doughnut-shaped steel plate 4 with damper bottom support bracket 5, bottom surface
Nail 15 installs doughnut-shaped steel plate 4 in place in 1 top surface of cushion cap；After the completion of pier shaft section assembling, damper top support will be had
9 steel bushing cartridge module 78 is mounted on the seaming position of pier shaft bottom segment 2 and bottom second section 3, and blending bolt 10 will lock
Plate 11 is locked；Later, by the top contact of Effects of Viscous Fluid Damper and bottom fitting respectively with it is on steel bushing cartridge module 7 and 8 and
Support 9 on doughnut-shaped steel plate 4 and support 5 connect, and ensure to connect it is firm.
(1) doughnut-shaped steel plate and steel bushing cartridge module are made: as shown in Figures 2 and 3.
First choice makes on the doughnut-shaped steel plate 4 of preparatory well cutting and is used for according to the installation site of Effects of Viscous Fluid Damper 12
The screw hole of damper bottom support bracket 5 is installed, and makes screw thread in screw hole；
The installation site of the Effects of Viscous Fluid Damper 12, the horizontal direction angle between two dampers is 90 ° ~ 135 °；
In 4 bottom surface of doughnut-shaped steel plate for making screw hole, peg 15 is enclosed along its perimeter uniform welding two；
After steel plate 4 is cooling, damper bottom support bracket 5 is fixed on above-mentioned doughnut-shaped steel plate 4 with bolt 6, and tighten bolt 6；
On the two valve steel bushings 78 rolled in advance, damper top support is being welded along the middle part of its short transverse respectively
9, using bilateral fillet weld seam；
The welding damper top support 9 should ensure that after the completion of steel bushing assembly, two damper top supports 9
Horizontal direction angle is identical as the 5 horizontal direction angle of damper bottom support bracket on doughnut-shaped steel plate pedestal 4.
(2) mounting assembly:
After 1 concreting of cushion cap, before the non-final set of concrete, will be made in (1) step with damper bottom
The doughnut-shaped steel plate pedestal 4 of portion's support 5 and peg 15 is mounted on 1 top surface concrete surface of cushion cap；
The installation of doughnut-shaped steel plate 4 is it is ensured that doughnut-shaped steel plate pedestal 4 is horizontal, and all pegs 15 are fully inserted into the top of cushion cap 1
Surface concrete, the bottom surface of doughnut-shaped steel plate pedestal 4 and the top surface concrete good fit of cushion cap 1；
When the doughnut-shaped steel plate 4 is installed, it should ensure that one of damper bottom support bracket 5 is located at suitable bridge to direction；
After the completion of Precast Concrete Segmental Bridges bridge pier section assembling, by coagulation near 3 seam of pier shaft bottom segment 2 and bottom second section
Native surface carries out dabbing processing；
It is rinsed with water clean processed concrete surface, and hairbrush is cooperated to scrub；
It is dried to pier shaft concrete surface；
One layer of uniform smearing of steel bushing A valve 7 and 8 inside of B valve with damper top support made in (1) step is viscous
Steel glue；
It should keep cleaning on the inside of the steel bushing, if its surface oxidisation, processing of rust removing should be carried out first；
Two valve components 7 and 8 set of the steel bushing of steel bonding glue will be coated in the bottom segment 2 of Precast Concrete Segmental Bridges bridge pier and bottom
The seaming position of second section 3 is tightened the latch 11 of steel bushing with bolt 10；
During the steel bushing installation is in place, by two damper top supports 9 on sleeve and it is located at doughnut-shaped steel plate pedestal 4
On the alignment of two damper bottom support brackets 5 after, then the bolt 10 on latch 11 all tightened；
The bottom fitting of Effects of Viscous Fluid Damper is connect with the damper bottom support bracket 5 on doughnut-shaped steel plate 4 with link bolt 13；
With link bolt 14 by the damper top support on the top contact of Effects of Viscous Fluid Damper and steel bushing A 7,8 valve of B
9 connections；
After the completion of two Effects of Viscous Fluid Damper 12 and bottom support bracket 5, top support 9 connect, by link bolt 13 and hingedly
Bolt 14 is tightened respectively.
After the installation is completed, damper and pier shaft it is vertical to angle be 30 ° ~ 45 °.
The present invention provides damping force using Effects of Viscous Fluid Damper for Precast Concrete Segmental Bridges bridge pier, improves prefabricated subsection spelling
The energy dissipation capacity of bridge pier is filled, and Effects of Viscous Fluid Damper is mounted on Precast Concrete Segmental Bridges bridge using steel bushing and doughnut-shaped steel plate
On pier and cushion cap, pre-buried reservation member is not needed, does not need the operation for punch etc. damage bridge pier structure yet, it is easy for installation.Together
When, the displacement stroke of general Effects of Viscous Fluid Damper is larger, can satisfy Precast Concrete Segmental Bridges bridge pier bridge pier under geological process
There is a situation where larger swings.The present invention only needs to install two Effects of Viscous Fluid Damper, angle α between 90 ° ~ 135 °,
More existing similar approach more save the cost.
Claims (10)
1. it is a kind of improve Precast Concrete Segmental Bridges bridge pier energy dissipation capacity method, it is characterised in that: using steel bushing, doughnut-shaped steel plate,
Effects of Viscous Fluid Damper and mating connector form a set of anti-seismic strengthening device, are mounted on Precast Concrete Segmental Bridges bridge pier, have
Steps are as follows for body:
Step 1: installing fixed damper bottom support bracket (5) above in the doughnut-shaped steel plate (4) that bottom surface is welded with peg；
Step 2: doughnut-shaped steel plate (4) is mounted on cushion cap (1) top surface, and ensure institute after cushion cap (1) concreting
There is peg to be fully inserted into cushion cap (1) top surface concrete；
Step 3: the steel bushing with damper top support (9) is mounted on bottom segment and bottom after pier shaft is assembled
The seam crossing of second section；
Step 4: by the bottom fitting of damper and top contact respectively with the damper bottom support bracket (5) on doughnut-shaped steel plate (4)
With damper top support (9) connection on steel bushing.
2. according to the method described in claim 1, it is characterized by: the doughnut-shaped steel plate is mounted on pier shaft connect with cushion cap (1)
Place, after guaranteeing that pier shaft is assembled, pier shaft is inside doughnut-shaped steel plate.
3. according to the method described in claim 1, it is characterized by: enabling one of damping when the doughnut-shaped steel plate (4) is installed
Device bottom support bracket (5) is located at suitable bridge to direction.
4. according to the method described in claim 1, it is characterized by: enabling the resistance on steel bushing in the steel bushing installation process
Damper bottom support bracket (5) in Buddhist nun's device top support (9) and doughnut-shaped steel plate (4) is all aligned.
5. according to the method described in claim 1, it is characterized by: the doughnut-shaped steel plate (4) bottom surface peg is along doughnut-shaped steel plate (4)
Perimeter welds N circle, N >=1.
6. according to the method described in claim 1, it is characterized by: the damper bottom support bracket (5) and doughnut-shaped steel plate (4) are adopted
It is connected with.
7. according to the method described in claim 1, it is characterized by: the doughnut-shaped steel plate (4) annular diameters are greater than bridge pier pier shaft
5% or more diameter.
8. according to the method described in claim 1, being used between component it is characterized by: the steel bushing is made of N valve component
It is bolted, N >=2.
9. according to the method described in claim 1, it is characterized by: the horizontal direction angle between described two dampers be 90 ° ~
135°。
10. according to the method described in claim 1, it is characterized by: the damper after the installation is completed, it is vertical with pier shaft
To angle between 30 ° ~ 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715330.7A CN108978447A (en) | 2018-06-29 | 2018-06-29 | The method for improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity |
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| CN201810715330.7A CN108978447A (en) | 2018-06-29 | 2018-06-29 | The method for improving Precast Concrete Segmental Bridges bridge pier energy dissipation capacity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706831A (en) * | 2019-01-11 | 2019-05-03 | 南京理工大学 | Improve the device and its construction method of the energy consumption of section assembling bridge pier and self-resetting capability |
| CN110820543A (en) * | 2019-10-18 | 2020-02-21 | 同济大学 | Cylindrical pier structure capable of being repeatedly disassembled and assembled and design method |
| CN110820770A (en) * | 2019-11-11 | 2020-02-21 | 安徽工程大学 | Prefabricated lattice beam and construction method thereof |
| CN113322794A (en) * | 2021-06-07 | 2021-08-31 | 同济大学 | Anti-roll section assembling swing single-column pier multiple damping system |
| CN113944098A (en) * | 2021-10-11 | 2022-01-18 | 北京建筑大学 | Take two pier stud structures of assembled from restoring to throne of energy dissipation steel sheet |
| CN116497846A (en) * | 2023-04-28 | 2023-07-28 | 中南大学 | Side slope supporting structure capable of dissipating energy and absorbing shock and construction method thereof |
| CN110820770B (en) * | 2019-11-11 | 2024-10-25 | 安徽工程大学 | Prefabricated lattice beam and construction method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706831A (en) * | 2019-01-11 | 2019-05-03 | 南京理工大学 | Improve the device and its construction method of the energy consumption of section assembling bridge pier and self-resetting capability |
| CN110820543A (en) * | 2019-10-18 | 2020-02-21 | 同济大学 | Cylindrical pier structure capable of being repeatedly disassembled and assembled and design method |
| CN110820543B (en) * | 2019-10-18 | 2020-12-29 | 同济大学 | Cylindrical pier structure capable of being repeatedly disassembled and assembled and design method |
| CN110820770A (en) * | 2019-11-11 | 2020-02-21 | 安徽工程大学 | Prefabricated lattice beam and construction method thereof |
| CN110820770B (en) * | 2019-11-11 | 2024-10-25 | 安徽工程大学 | Prefabricated lattice beam and construction method thereof |
| CN113322794A (en) * | 2021-06-07 | 2021-08-31 | 同济大学 | Anti-roll section assembling swing single-column pier multiple damping system |
| CN113322794B (en) * | 2021-06-07 | 2022-09-13 | 同济大学 | Anti-roll section assembling swing single-column pier multiple damping system |
| CN113944098A (en) * | 2021-10-11 | 2022-01-18 | 北京建筑大学 | Take two pier stud structures of assembled from restoring to throne of energy dissipation steel sheet |
| CN113944098B (en) * | 2021-10-11 | 2023-10-17 | 北京建筑大学 | Assembled self-resetting double pier column structure with energy dissipation steel plates |
| CN116497846A (en) * | 2023-04-28 | 2023-07-28 | 中南大学 | Side slope supporting structure capable of dissipating energy and absorbing shock and construction method thereof |
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Application publication date: 20181211 |