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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Abstract
The utility model relates to a steel pipe concrete rectangle pier and basic connection structure with from reset function. The technical scheme is as follows: the concrete bearing platform is poured on a 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, and after tensioning, the end part is fixed by adopting a base plate and a supporting nut; and the prestressed reinforcement penetrates through the preformed hole B, and after tensioning, the end part is anchored by using a supporting nut. The utility model discloses existing bearing capacity also has from the reset ability.
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)
1. The connecting structure of the steel pipe concrete rectangular pier and the foundation with the self-resetting function is characterized by comprising 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 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.
2. The structure for connecting a concrete filled steel tube rectangular pier and foundation with a self-restoration function according to claim 1, wherein a stiffening rib is provided between the rectangular steel tube and the perforated square plate.
3. The connection structure of a concrete filled steel tube rectangular pier and foundation with a self-resetting function according to claim 1, wherein a spiral bar is arranged around the upper end of the prestressed steel strand, and the spiral bar is arranged in the filling concrete.
Priority Applications (1)
| 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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| 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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| CN214939362U true CN214939362U (en) | 2021-11-30 |
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| CN202121085790.XU Active 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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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 type concrete-filled steel tube column base for large power 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 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 |
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