CN214939362U - Steel pipe concrete rectangular pier and foundation connecting structure with self-resetting function - Google Patents
Steel pipe concrete rectangular pier and foundation connecting structure with self-resetting function Download PDFInfo
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- CN214939362U CN214939362U CN202121085790.XU CN202121085790U CN214939362U CN 214939362 U CN214939362 U CN 214939362U CN 202121085790 U CN202121085790 U CN 202121085790U CN 214939362 U CN214939362 U CN 214939362U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 description 13
- 238000006073 displacement reaction Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
本实用新型涉及具有自复位功能的钢管混凝土矩形桥墩与基础的连接结构。技术方案如下：包括混凝土承台、矩形钢管、矩形钢板、带孔方板、填充混凝土、预应力钢绞线和预应力钢筋，在基础上浇筑混凝土承台，矩形钢板设置在基础与混凝土承台之间，带孔方板设置在混凝土承台上面；矩形钢管沿带孔方板的孔缘放置，矩形钢管与带孔方板焊接在一起，填充混凝土填充在矩形钢管内；在填充混凝土和混凝土承台中心设置预留孔A，在矩形钢管周围的混凝土承台中设置预留孔B；预应力钢绞线穿过预留孔A，张拉后，端部采用垫板和支承螺母固定；预应力钢筋穿过预留孔B，张拉后，端部用支承螺母锚固。本实用新型既有足够的承载力，也有自复位能力。
The utility model relates to a connection structure of a steel tube concrete rectangular bridge pier with a self-resetting function and a foundation. The technical scheme is as follows: including concrete caps, rectangular steel pipes, rectangular steel plates, square plates with holes, filled concrete, prestressed steel strands and prestressed steel bars, pouring the concrete caps on the foundation, and setting the rectangular steel plates on the foundation and the concrete caps In between, the square plate with holes is set on the concrete bearing platform; the rectangular steel pipe is placed along the hole edge of the square plate with holes, the rectangular steel pipe and the square plate with holes are welded together, and the filling concrete is filled in the rectangular steel pipe; A reserved hole A is set in the center of the bearing platform, and a reserved hole B is set in the concrete bearing platform around the rectangular steel pipe; the prestressed steel strand passes through the reserved hole A, and after tensioning, the end is fixed with a backing plate and a supporting nut; The stress bar passes through the reserved hole B, and after tensioning, the end is anchored with a support nut. The utility model has both sufficient bearing capacity and self-reset capability.
Description
Technical Field
The utility model relates to a bridge engineering field, concretely relates to concrete filled steel tube rectangle pier and basic connection structure with from reset 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a connection structure of concrete filled steel tube rectangle pier and basis with from reset function, existing sufficient bearing capacity also has from reset ability.
The technical scheme of the utility model as follows:
the connecting structure of the steel pipe concrete rectangular pier and the foundation with the self-resetting function comprises a concrete bearing platform, a rectangular steel pipe, a rectangular steel plate, a square plate with holes, filled concrete, prestressed steel strands and prestressed steel bars, wherein the concrete bearing platform is poured on the foundation, the rectangular steel plate is arranged between the foundation and the concrete bearing platform, and the square plate with the holes is arranged on the concrete bearing platform; the rectangular steel pipe is placed along the hole edge of the square plate with the hole, the rectangular steel pipe and the square plate with the hole are welded together, and filling concrete is filled in the rectangular steel pipe; a prepared hole A is arranged in the center of the filling concrete and the concrete bearing platform, and a prepared hole B is arranged in the concrete bearing platform around the rectangular steel pipe; the prestressed steel strand penetrates through the preformed hole A, is tensioned by adopting a post-tensioning method, and the end part is fixed by adopting a base plate and a supporting nut; the prestressed reinforcement penetrates through the preformed hole B, is tensioned by adopting a post-tensioning method, and the end part is anchored by using a supporting nut.
Furthermore, the connecting structure of the concrete filled steel tube rectangular pier and the foundation with the self-resetting function is characterized in that a stiffening rib is arranged between the rectangular steel tube and the square plate with the holes.
Further, the steel pipe concrete rectangular pier and foundation connecting structure with the self-resetting function is characterized in that spiral ribs are arranged around the upper end of each prestressed steel strand, and the spiral ribs are arranged in the filling concrete.
The utility model has the advantages that:
1. the utility model discloses when the earthquake was used, at first take place certain bending deformation then take place to sway, the rectangle steel pipe produces good energy dissipation effect, can destroy the major structure in order to avoid with earthquake damage control in certain extent, has better anti-seismic performance.
2. After the earthquake, the rectangular steel pipe and the filling 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 utility model discloses the construction is simple and convenient, quality safe and reliable, facilitate promotion.
Drawings
FIG. 1 is a schematic view of a connection structure of a concrete filled steel tube rectangular pier and a foundation with a self-resetting function;
FIG. 2 is a schematic perspective view of a connection structure of a concrete filled steel tube rectangular pier and a foundation with a self-resetting function;
fig. 3 is a schematic view of a deformation state of a connection structure of a concrete filled steel tube rectangular pier and a foundation with a self-resetting function.
Detailed Description
As shown in fig. 1 and 2, the connection structure of the steel pipe concrete rectangular pier and the foundation with the self-resetting function comprises a concrete bearing platform 9, a rectangular steel pipe 1, a rectangular steel plate 14, a square plate with holes 12, filling concrete 2, prestressed steel strands 6 and prestressed steel bars 8, wherein the concrete bearing platform 9 is poured on the foundation, the rectangular steel plate 14 is arranged between the foundation and the concrete bearing platform 9, and the square plate with holes 12 is arranged on the concrete bearing platform 9; the rectangular steel pipe 1 is placed along the hole edge of the square plate with the hole 12, the rectangular steel pipe 1 and the square plate with the hole 12 are welded together, the stiffening rib 5 is arranged between the rectangular steel pipe 1 and the square plate with the hole 12, and the filling concrete 2 is filled in the rectangular steel pipe 1; a prepared hole A7 is arranged in the center of the filling concrete 2 and the concrete bearing platform 9, and a prepared hole B10 is arranged in the concrete bearing platform 9 around the rectangular steel pipe 1; the prestressed steel strand 6 penetrates through the preformed hole A7, is tensioned by adopting a post-tensioning method, and the end part is fixed by adopting the backing plate 3 and the supporting nut 11; the prestressed reinforcement 8 passes through the preformed hole B10, is tensioned by adopting a post-tensioning method, and the end part is anchored by a supporting nut 11; 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.
The construction method of the connection structure of the concrete filled steel tube rectangular pier and the foundation with the self-resetting function comprises 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; mounting a rectangular steel plate 14; pouring a concrete bearing platform 9; respectively penetrating the prestressed steel strand 6 and the prestressed reinforcement 8 out of the preformed hole A7 and the preformed hole B10;
step two: installing the rectangular steel pipe 1 and the square plate with holes 12
Installing a square plate with holes 12 at the top of the concrete bearing platform 9, installing a rectangular steel pipe 1 at the upper part of the square plate with holes 12, and welding the square plate with holes 12 and the rectangular steel pipe 1 into a whole by using a stiffening rib 5; pouring and filling concrete 2 into the rectangular steel pipe 1, and enabling the prestressed steel strand 6 to penetrate out of the preformed hole A7;
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 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.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121085790.XU CN214939362U (en) | 2021-05-18 | 2021-05-18 | Steel pipe concrete rectangular pier and foundation connecting structure with self-resetting function |
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| CN202121085790.XU CN214939362U (en) | 2021-05-18 | 2021-05-18 | Steel pipe concrete rectangular pier and foundation connecting structure with self-resetting function |
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| CN214939362U true CN214939362U (en) | 2021-11-30 |
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Cited By (1)
| 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 concrete-filled steel tubular column foot for large-scale transmission tower and construction method thereof |
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2021
- 2021-05-18 CN CN202121085790.XU patent/CN214939362U/en active Active
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 concrete-filled steel tubular column foot for large-scale 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 |
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