CN113047184A - Construction method of connection structure of partially-filled concrete-filled steel tube pier and foundation with self-resetting function - Google Patents
Construction method of connection structure of partially-filled concrete-filled steel tube pier and foundation with self-resetting function Download PDFInfo
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- CN113047184A CN113047184A CN202110537893.3A CN202110537893A CN113047184A CN 113047184 A CN113047184 A CN 113047184A CN 202110537893 A CN202110537893 A CN 202110537893A CN 113047184 A CN113047184 A CN 113047184A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 74
- 239000010959 steel Substances 0.000 title claims abstract description 74
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims description 18
- 238000004873 anchoring Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling 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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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the field of bridge engineering, in particular to a construction method of a connecting structure of a partially-filled concrete-filled steel tube pier and a foundation with a self-resetting function. The technical scheme is as follows: the method comprises the following steps: the method comprises the following steps: pouring a concrete bearing platform; step two: installing a steel pipe and a perforated plate; step three: and tensioning the prestressed steel strands and the prestressed steel bars. The construction method of the connecting structure of the partially filled concrete-filled steel tube pier and the foundation with the self-resetting function, provided by the invention, has enough bearing capacity and self-resetting capability.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a construction method of a connecting structure of a partially-filled concrete-filled steel tube pier and a foundation with a self-resetting function.
Background
The traditional ductile bridge pier has high bearing capacity, good ductility and excellent seismic performance, but has poor restorability after earthquake.
The traditional self-resetting bridge pier is composed of a bearing component, a self-resetting component, an energy dissipation component and a joint, and is a novel anti-seismic bridge pier system appearing in recent years. The pier has the advantages of small permanent deformation after earthquake and good restorability, but the pier has small lateral stiffness and low bearing capacity and is not suitable for bridges in heavy-load traffic.
Two kinds of ductility pier and self-resetting pier in the traditional sense have common problems in use: the arrangement mode of the joint component.
(1) For a traditional ductile pier, a pier column is in rigid connection with a bearing platform, and seismic energy is dissipated through ductility of a plastic hinge area of the pier. However, the accumulated deformation of such a pier from elastic deformation to plastic deformation causes a large permanent residual deformation after the earthquake. Minor damage can be repaired, while bridges with severe damage need to be rebuilt, which is time and labor consuming and affects the normal traffic function of the bridge.
(2) For the traditional self-resetting bridge pier, the pier column and the bearing platform adopt hinged joints, the joints of the connecting mode are easy to be damaged by pressure, and the parallel and level butt joint contact joints are not beneficial to the transmission of shearing force and are easy to cause the shearing damage of prestressed reinforcements.
Disclosure of Invention
The invention provides a construction method of a connecting structure of a partially-filled concrete-filled steel tube pier and a foundation with a self-resetting function.
The technical scheme of the invention is as follows:
the construction method of the connecting structure of the partially filled concrete-filled steel tube pier and the foundation with the self-resetting function comprises the following steps:
the method comprises the following steps: cast concrete bearing platform
Embedding a supporting nut in the foundation and anchoring one end of the prestressed steel strand and one end of the prestressed reinforcement; installing a rectangular steel plate on a foundation, pouring a concrete bearing platform above the rectangular steel plate, wherein a preformed hole A is formed in the center of the concrete bearing platform, and a plurality of preformed holes B are formed in the periphery of the concrete bearing platform; penetrating out the prestressed steel strands from the preformed hole A, and penetrating out a plurality of prestressed steel bars from the preformed hole B;
step two: mounting steel pipe and perforated plate
Installing a perforated plate at the top of the concrete bearing platform, installing a steel pipe at the upper part of the perforated plate, and welding the perforated plate and the steel pipe into a whole by using a stiffening rib; pouring filling concrete into the steel pipe, arranging a reserved hole C in the center of the filling concrete, enabling the reserved hole C to be concentric with the reserved hole A, and enabling the prestressed steel strand to penetrate out of the reserved hole C;
step three: stretching prestressed strand and prestressed reinforcement
Tensioning the prestressed steel strand by using a post-tensioning method, and anchoring the upper end of the prestressed steel strand by using a backing plate and a supporting nut; and tensioning the prestressed reinforcement by using a post-tensioning method, and anchoring the upper end of the prestressed reinforcement on the perforated plate by using a supporting nut.
Further, in the construction method of the connection structure of the partially filled concrete-filled steel tube pier and the foundation with the self-resetting function, the cross section of the steel tube is square, rectangular, circular or oval.
Further, according to the construction method of the connection structure of the partially-filled concrete-filled steel tube pier and the foundation with the self-resetting function, the spiral ribs are arranged around the upper end of the prestressed steel strand, and the spiral ribs are arranged in the filled concrete.
The invention has the beneficial effects that:
1. when the connecting structure is used in earthquake, certain bending deformation and then swinging occur, the steel pipe generates a good energy dissipation effect, earthquake damage can be controlled within a certain range to avoid damage of the main body structure, and the connecting structure has good earthquake resistance.
2. After the earthquake, the steel pipe and the filled concrete can be pulled back to the original shape by the prestressed steel strands and the prestressed steel bars, so that the residual deformation is reduced, and the pier is restored to the original position.
3. The invention has simple construction, safe and reliable quality and convenient popularization.
Drawings
FIG. 1 is a schematic view of a connection structure of a partially-filled concrete-filled steel tube rectangular pier and a foundation with a self-resetting function in example 1;
FIG. 2 is a schematic perspective view of a connection structure of a partially-filled concrete-filled steel tube rectangular pier and a foundation with a self-resetting function in example 1;
FIG. 3 is a schematic view of a deformation state of a connection structure of a partially-filled concrete-filled steel tube rectangular pier and a foundation with a self-resetting function;
fig. 4 is a schematic perspective view of a connection structure between a partially-filled concrete-filled steel tube rectangular pier and a foundation having a self-resetting function in example 2.
Detailed Description
Example 1
As shown in fig. 1 and 2, the construction method of the connection structure of the partially filled concrete-filled steel tube pier and the foundation having the self-restoration function includes the following steps:
the method comprises the following steps: cast concrete bearing platform 9
Embedding a support nut 11 in the foundation and anchoring one ends of the prestressed steel strands 6 and the prestressed steel bars 8; installing a rectangular steel plate 14 on a foundation, pouring a concrete bearing platform 9 above the rectangular steel plate 14, arranging a preformed hole A in the center of the concrete bearing platform 9, and arranging a plurality of preformed holes B10 around the concrete bearing platform 9; the prestressed steel strands 6 penetrate out of the preformed holes A, and the plurality of prestressed steel bars 8 penetrate out of the preformed holes B10;
step two: mounting the steel pipe 1 and the perforated plate 12
Installing a perforated plate 12 at the top of a concrete bearing platform 9, installing a steel pipe 1 on the upper part of the perforated plate 12, wherein the section of the steel pipe 1 is rectangular, and welding the perforated plate 12 and the steel pipe 1 into a whole by using a stiffening rib 5; pouring filling concrete 2 into the steel pipe 1, wherein a preformed hole C7 is formed in the center of the filling concrete 2, the preformed hole C7 is concentric with the preformed hole A, and the prestressed steel strand 6 penetrates out of the preformed hole C7; spiral reinforcements 4 are arranged around the upper ends of the prestressed steel strands 6, and the spiral reinforcements 4 are arranged in the filling concrete 2;
step three: stretching prestressed steel strand 6 and prestressed reinforcement 8
Tensioning the prestressed steel strand 6 by using a post-tensioning method, and anchoring the upper end of the prestressed steel strand by using a backing plate 3 and a supporting nut 11; the prestressed reinforcement 8 is tensioned by a post-tensioning method, and the upper end is anchored on a perforated plate 12 by a supporting nut 11.
As shown in fig. 3, in the figure: pPInternal force of prestressed steel strand, LPEffective length of prestressed reinforcement, delta total: total horizontal displacement, θ: opening angle of pier, d is pier column section diameter, hc: height of pier column, Gc: dead weight of pier, Gsup: superstructure load, FEDiTension generated by the ith prestressed reinforcement, e: rotation point, h: distance from the upper structure load point of action to the top of the concrete cap, APArea of the cross section of the prestressed steel strand, dEDi: distance from ith prestressed reinforcement to point e, c: distance from the point of rotation to the edge of the pier.
During earthquake, under the action of horizontal earthquake force, the pier is firstly subjected to bending deformation to consume energy, then a clearance angle theta is formed between the pier and the concrete bearing platform 9, the pier starts to rotate, the clearance angle theta is continuously increased along with the continuous increase of horizontal load, and the tension F of the prestressed reinforcement 8 isEDiAnd 6 tension P of prestressed steel strandPQuickly increased and 6 tension P of prestressed steel strandPThe yield bearing capacity is not reached in the whole stress process of the pier. The total horizontal displacement delta total comprises horizontal displacement generated by bending deformation of the bridge pier and horizontal displacement generated by rotation of the bridge pier. And after the earthquake load is unloaded, the pier is restored to the original position by utilizing the tensile force of the prestressed reinforcement 8 and the prestressed steel strand 6.
Example 2
As shown in fig. 4, the difference from example 1 is that the cross-sectional shape of the steel pipe 1 is circular.
Claims (3)
1. The construction method of the connecting structure of the partially filled concrete-filled steel tube pier and the foundation with the self-resetting function is characterized by comprising the following steps of:
the method comprises the following steps: cast concrete bearing platform
Embedding a supporting nut in the foundation and anchoring one end of the prestressed steel strand and one end of the prestressed reinforcement; installing a rectangular steel plate on a foundation, pouring a concrete bearing platform above the rectangular steel plate, wherein a preformed hole A is formed in the center of the concrete bearing platform, and a plurality of preformed holes B are formed in the periphery of the concrete bearing platform; penetrating out the prestressed steel strands from the preformed hole A, and penetrating out a plurality of prestressed steel bars from the preformed hole B;
step two: mounting steel pipe and perforated plate
Installing a perforated plate at the top of the concrete bearing platform, installing a steel pipe at the upper part of the perforated plate, and welding the perforated plate and the steel pipe into a whole by using a stiffening rib; pouring filling concrete into the steel pipe, arranging a reserved hole C in the center of the filling concrete, enabling the reserved hole C to be concentric with the reserved hole A, and enabling the prestressed steel strand to penetrate out of the reserved hole C;
step three: stretching prestressed strand and prestressed reinforcement
Tensioning the prestressed steel strand by using a post-tensioning method, and anchoring the upper end of the prestressed steel strand by using a backing plate and a supporting nut; and tensioning the prestressed reinforcement by using a post-tensioning method, and anchoring the upper end of the prestressed reinforcement on the perforated plate by using a supporting nut.
2. The construction method of a connection structure of a partially filled concrete filled steel tube pier and foundation having a self-restoration function according to claim 1, wherein the shape of the cross section of the steel tube is square, rectangular, circular or oval.
3. The construction method of the connection structure of the pier and the foundation with the self-restoration function of the partially filled concrete-filled steel tube according to claim 1, wherein a spiral bar is provided around the upper end of the prestressed steel strand, and the spiral bar is provided in the filled concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537893.3A CN113047184A (en) | 2021-05-18 | 2021-05-18 | Construction method of connection structure of partially-filled concrete-filled steel tube pier and foundation with self-resetting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537893.3A CN113047184A (en) | 2021-05-18 | 2021-05-18 | Construction method of connection structure of partially-filled concrete-filled steel tube pier and foundation with self-resetting function |
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| CN113047184A true CN113047184A (en) | 2021-06-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396192A (en) * | 2021-12-13 | 2022-04-26 | 中国能源建设集团安徽省电力设计院有限公司 | Plug-in type concrete-filled steel tube column base for large power transmission tower and construction method thereof |
| CN117385732A (en) * | 2023-11-30 | 2024-01-12 | 石家庄铁道大学 | Prefabricated assembly type swing pier structure system, installation method and application |
Citations (4)
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|---|---|---|---|---|
| KR20030036572A (en) * | 2003-04-21 | 2003-05-09 | 주식회사 일승에스티 | Construction method and structure of steel foundation for connecting steel pier and steel pipe pile |
| CN204919987U (en) * | 2015-07-22 | 2015-12-30 | 北京建筑大学 | Prestressing force sways and exposes formula column base |
| CN205935236U (en) * | 2016-07-08 | 2017-02-08 | 西安建筑科技大学 | From square steel tube concrete frame column base node that restores to throne |
| CN211973073U (en) * | 2019-12-03 | 2020-11-20 | 防灾科技学院 | Cable-stayed bridge auxiliary pier system free of earthquake damage design |
-
2021
- 2021-05-18 CN CN202110537893.3A patent/CN113047184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030036572A (en) * | 2003-04-21 | 2003-05-09 | 주식회사 일승에스티 | Construction method and structure of steel foundation for connecting steel pier and steel pipe pile |
| CN204919987U (en) * | 2015-07-22 | 2015-12-30 | 北京建筑大学 | Prestressing force sways and exposes formula column base |
| CN205935236U (en) * | 2016-07-08 | 2017-02-08 | 西安建筑科技大学 | From square steel tube concrete frame column base node that restores to throne |
| CN211973073U (en) * | 2019-12-03 | 2020-11-20 | 防灾科技学院 | Cable-stayed bridge auxiliary pier system free of earthquake damage design |
Non-Patent Citations (1)
| Title |
|---|
| 崔京浩: "《第19届全国结构工程学术会议论文集 第2册》", 31 October 2010 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396192A (en) * | 2021-12-13 | 2022-04-26 | 中国能源建设集团安徽省电力设计院有限公司 | Plug-in type concrete-filled steel tube column base for large power transmission tower and construction method thereof |
| CN114396192B (en) * | 2021-12-13 | 2024-03-15 | 中国能源建设集团安徽省电力设计院有限公司 | Inserted steel tube concrete column base for large power transmission tower and construction method thereof |
| CN117385732A (en) * | 2023-11-30 | 2024-01-12 | 石家庄铁道大学 | Prefabricated assembly type swing pier structure system, installation method and application |
| CN117385732B (en) * | 2023-11-30 | 2024-06-04 | 石家庄铁道大学 | Prefabricated assembly type swing pier structure system, installation method and application |
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Application publication date: 20210629 |