CN114892509A - Rocking pier based on tumbler principle - Google Patents
Rocking pier based on tumbler principle Download PDFInfo
- Publication number
- CN114892509A CN114892509A CN202210677934.3A CN202210677934A CN114892509A CN 114892509 A CN114892509 A CN 114892509A CN 202210677934 A CN202210677934 A CN 202210677934A CN 114892509 A CN114892509 A CN 114892509A
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- pier
- bearing platform
- arc
- pendulum
- pvc
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 230000002787 reinforcement Effects 0.000 claims description 29
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 230000005484 gravity Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance 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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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 discloses a swinging pier based on a tumbler principle, which relates to the technical field of bridge engineering and comprises a pier and a bearing platform, wherein the bearing platform consists of an upper pendulum and a lower pendulum, the bottom of the upper pendulum of the bearing platform is an arc-shaped convex surface, the top of the lower pendulum of the bearing platform is an arc-shaped concave surface, and the arc-shaped convex surface is arranged on the arc-shaped concave surface; the pier and the upper pendulum of the bearing platform are cast into a whole, and the whole is in a convex shape with a wide lower part and a slender upper part; PVC reserved hole channels I are formed in the centers of the pier and the bearing platform, unbonded prestressed steel bars are installed in the PVC reserved hole channels I, and the unbonded prestressed steel bars are used for connecting the pier and the bearing platform into a whole; the upper pendulum and the lower pendulum of the bearing platform are connected through energy-consuming steel bars; the energy consumption capacity of the invention is obvious, the damage of contact surface concrete caused by stress concentration at the joint of the traditional swing bridge pier can be reduced, the self-resetting performance of the bridge is improved, and the bridge after earthquake can be repaired conveniently.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a swinging pier based on a tumbler principle.
Background
The bridge plays a key role in the transportation of China, and the rapid recovery application of the bridge after an earthquake provides guarantee for rapidly getting through the life line of earthquake relief; the swinging bridge pier can control earthquake damage on a swinging interface to avoid the main body structure from being damaged, and has better earthquake resistance and self-resetting capability, so that the swinging bridge pier has remarkable advantage in the aspect of improving the recovery capability of the structure after earthquake; however, the existing swinging self-resetting bridge pier has some problems: (1) under the action of an earthquake, the swinging of the pier is realized through the lifting-off closing of the swinging interface, and concrete on the swinging interface is stressed and extruded in the swinging process, so that the concrete on the contact surface is easily crushed, the quick recovery after the earthquake is inconvenient, and the maintenance difficulty is increased; (2) the displacement of the swing interface under the action of earthquake is often too small, the deformation of the energy consumption device is small, and the energy consumption capability is seriously insufficient; (3) the existing swing pier is connected into a whole by unbonded prestressed reinforcements, and the prestressed reinforcements are easy to loosen in the installation and use processes to influence the self-resetting capability of the pier, so that serious potential safety hazards exist.
Disclosure of Invention
In order to solve the problems that the existing swing bridge pier is insufficient in structure energy consumption capacity under the action of an earthquake, a swing interface is easy to crush, and the self-resetting capacity of the swing bridge pier is insufficient, the invention provides the technical scheme that: a swinging bridge pier based on a tumbler principle comprises a bridge pier and a bearing platform, wherein the bearing platform consists of an upper pendulum and a lower pendulum, the bottom of the upper pendulum of the bearing platform is an arc-shaped convex surface, the top of the lower pendulum of the bearing platform is an arc-shaped concave surface, and the arc-shaped convex surface is arranged on the arc-shaped concave surface; the pier and the upper pendulum of the bearing platform are cast into a whole, and the whole is wide at the lower part and long at the upper part; PVC reserved hole channels I are formed in the centers of the pier and the bearing platform, unbonded prestressed steel bars are installed in the PVC reserved hole channels I, and the unbonded prestressed steel bars are used for connecting the pier and the bearing platform together; the upper pendulum and the lower pendulum are connected through energy-consuming steel bars, and the arc-shaped convex surface and the arc-shaped concave surface form a swinging surface.
Furthermore, a gap is formed between the arc-shaped concave surface and the arc-shaped convex surface, and high-damping rubber is filled in the gap.
Further, the radius of the arc-shaped concave surface is larger than that of the arc-shaped convex surface.
Furthermore, PVC reserved hole channels II are correspondingly arranged on the upper pendulum and the lower pendulum, the energy consumption reinforcing steel bars are installed in the PVC reserved hole channels II, the PVC reserved hole channels II and the energy consumption reinforcing steel bars are provided with a plurality of the energy consumption reinforcing steel bars, and the PVC reserved hole channels II and the energy consumption reinforcing steel bars are distributed on the bearing platform in a circular ring shape.
Furthermore, the upper end of the unbonded prestressed steel bar is connected with the top of a pier, the lower end of the unbonded prestressed steel bar is connected with the lower hem of the bearing platform, the upper end of the energy consumption steel bar is connected with the upper hem of the bearing platform through a high-strength bolt, the lower end of the energy consumption steel bar is connected with the bottom of the lower hem of the bearing platform through a self-locking one-way bolt, and the energy consumption steel bar is distributed on two sides of the bearing platform.
Furthermore, a prestressed steel bar fixing end anchorage device is arranged at the bottom of the unbonded prestressed steel bar, and a prestressed steel bar tensioning end anchorage device is arranged at the top of the unbonded prestressed steel bar.
Further, the pier top is provided with recess one, the lower hem bottom is provided with recess two and a plurality of recess three, install in recess one the upper end of unbonded prestressed reinforcement, the lower extreme of unbonded prestressed reinforcement is installed in recess two, the lower extreme of power consumption reinforcing bar is installed in recess three.
Further, a first matched steel base plate is arranged in the first groove, a second matched steel base plate is arranged in the second groove, and a third matched steel base plate is arranged in the third groove.
Compared with the prior art, the invention has the beneficial effects that: (1) according to the invention, the swinging surface is arranged in the middle of the bearing platform, and the energy consumption steel bars are arranged on two sides of the bearing platform, so that compared with the traditional swinging structure, the energy consumption steel bars can generate large enough deformation, and the problem of insufficient energy consumption of the existing swinging structure energy consumption device is effectively solved; (2) the contact area is increased through the contact surface formed by the two arcs, the concrete can be effectively prevented from being crushed, the contact rigidity at the bottom of the pier can be reduced by filling high-damping rubber in the gap, and when the pier swings under the action of strong shock, the damage of the local concrete of the contact surface can be reduced, so that the effect of dissipating part of seismic energy is achieved; (3) according to the self-resetting bridge structure, the self-resetting capability can be generated by utilizing the self gravity through the tumbler system structure consisting of the bridge pier and the bearing platform, the contact surface design of the circular arc can enable the bridge pier to return to the initial position after swinging, the residual deformation of the bridge structure after earthquake can be eliminated, and the problem that the tension force is insufficient due to the loss of the prestress without the bonding prestressed steel bars, so that the residual displacement of the bridge after earthquake is overlarge, and the normal use is influenced is effectively solved; (4) after the earthquake, the energy-consuming reinforcing steel bars yielding in the PVC reserved hole channels are removed and replaced, the normal use of the bridge structure is not influenced in the replacement process, and the rapid recovery of the shock resistance of the bridge is facilitated.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Reference numerals: 1-lower hem; 2-upward swinging; 3-bridge pier; 4-unbonded prestressed reinforcement; 5-high damping rubber; 6-PVC reserved hole channel I; 7-energy consumption steel bars; 8-groove III; 9-groove two; 10, a first groove; 101-arc concave surface; 201-convex surface of circular arc.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
Example (b): as shown in fig. 1, the rocking pier based on the tumbler principle comprises a pier 3 and a bearing platform, wherein the bearing platform consists of an upper pendulum 2 and a lower pendulum 1, the bottom of the upper pendulum 2 of the bearing platform is an arc-shaped convex surface 201, the top of the lower pendulum 1 of the bearing platform is an arc-shaped concave surface 101, and the arc-shaped convex surface 201 is arranged on the arc-shaped concave surface 101; the pier 3 and the upper hem 2 of the bearing platform are cast into a whole, and the whole is wide at the lower part and long and thin at the upper part; PVC reserved hole channels I6 are formed in the centers of the pier 3 and the bearing platform, unbonded prestressed reinforcements 4 are arranged in the PVC reserved hole channels I6, and the unbonded prestressed reinforcements 4 are used for connecting the pier 3 and the bearing platform together; the upper pendulum 2 and the lower pendulum 1 are connected through an energy consumption steel bar 7, and a circular arc convex surface 201 and a circular arc concave surface 101 form a swinging surface; a gap is arranged between the arc-shaped concave surface 101 and the arc-shaped convex surface 201, and the gap is filled with high damping rubber 5; the radius of the circular arc concave surface 101 is larger than that of the circular arc convex surface 201.
PVC reserved hole channels II are correspondingly arranged on the upper hem 2 and the lower hem 1, energy-consuming reinforcing steel bars 7 are arranged in the PVC reserved hole channels II, a plurality of PVC reserved hole channels II and a plurality of energy-consuming reinforcing steel bars 7 are arranged, and the PVC reserved hole channels II and the energy-consuming reinforcing steel bars 7 are distributed on the bearing platform in a circular ring shape; the upper end of an unbonded prestressed reinforcement 4 is connected with the top of a pier 3, the lower end of the unbonded prestressed reinforcement 4 is connected with a lower hem 1 of a bearing platform, the upper end of an energy-consuming reinforcement 7 is connected with an upper hem 2 of the bearing platform through a high-strength bolt, the lower end of the energy-consuming reinforcement 7 is connected with the bottom of the lower hem 1 of the bearing platform through a self-locking one-way bolt, and the energy-consuming reinforcements 7 are distributed on two sides of the bearing platform; the bottom of the unbonded prestressed reinforcement 4 is provided with a prestressed reinforcement fixed end anchorage, and the top of the unbonded prestressed reinforcement 4 is provided with a prestressed reinforcement tensioning end anchorage.
The top of the pier 3 is provided with a first groove 10, the bottom of the lower hem 1 is provided with a second groove 9 and a plurality of third grooves 8, the upper end of the unbonded prestressed reinforcement 4 is installed in the first groove 10, the lower end of the unbonded prestressed reinforcement 4 is installed in the second groove 9, and the lower end of the energy dissipation reinforcement 7 is installed in the third groove 8; a first matched steel base plate is arranged in the first groove 10, a second matched steel base plate is arranged in the second groove 9, and a third matched steel base plate is arranged in the third groove 8.
The working principle of the invention is as follows: with bridge fixed mounting on pier 3, under normal use state, because the last pendulum 2 of cushion cap is wide big, fill with high damping rubber 5 between the last pendulum 2 of cushion cap and the 1 contact surface of lower hem, guaranteed the stability of pier 3 in normal use, when the bridge received slight vibrations, under the restraint of bridge gravity and unbonded prestressed reinforcement 4, high damping rubber 5 can not compress, the bridge can keep the stable state.
When receiving little vibrations, link pier 3 and cushion cap together through unbonded prestressing steel 4 and power consumption reinforcing bar 7, guaranteed the wholeness of structure, come to remain stable through the gravity of bridge self.
When the bridge pier is subjected to large vibration, the bridge pier 3 and the bearing platform are connected together through the unbonded prestressed steel bars 4 and the energy dissipation steel bars 7, and meanwhile, the arc shape with a gap is formed between the upper pendulum 2 and the lower pendulum 1, so that the contact rigidity is reduced and the swing is facilitated; the high-damping rubber 5 is arranged between the contact surfaces, so that the impact force on the contact surfaces is reduced, the concrete damage on the contact surfaces is relieved, and certain vibration energy can be consumed; when 3 take place the slope at the pier, most seismic energy is consumed to power consumption reinforcing bar 7, because pier 3 and cushion cap 2 have constituteed the structure system of similar tumbler, the structure that pier 3 and cushion cap 2 constitute utilizes the principle of tumbler to carry out from restoring to the throne, and the restoring force that collocation unbonded prestressed reinforcement 4 and bridge self gravity provided has greatly improved the self-restoration ability of bridge, has reduced the residual displacement of bridge after shaking.
Claims (8)
1. The utility model provides a sway pier based on tumbler principle, includes pier (3) and cushion cap, its characterized in that: the bearing platform consists of an upper pendulum (2) and a lower pendulum (1), the bottom of the upper pendulum (2) of the bearing platform is an arc-shaped convex surface (201), the top of the lower pendulum (1) of the bearing platform is an arc-shaped concave surface (101), and the arc-shaped convex surface (201) is arranged on the arc-shaped concave surface (101); the pier (3) and the upper hem (2) of the bearing platform are cast into a whole, and the whole is wide at the lower part and long at the upper part; PVC reserved hole channels I (6) are formed in the centers of the pier (3) and the bearing platform, unbonded prestressed reinforcements (4) are installed in the PVC reserved hole channels I (6), and the unbonded prestressed reinforcements (4) are used for connecting the pier (3) and the bearing platform together; the upper pendulum (2) and the lower pendulum (1) are connected through energy-consuming steel bars (7), and the arc-shaped convex surface (201) and the arc-shaped concave surface (101) form a swinging surface.
2. The rocking pier based on the tumbler principle as claimed in claim 1, wherein: a gap is formed between the arc-shaped concave surface (101) and the arc-shaped convex surface (201), and high-damping rubber (5) is filled in the gap.
3. The rocking pier based on the tumbler principle as claimed in claim 1, wherein: the radius of the circular arc concave surface (101) is larger than that of the circular arc convex surface (201).
4. The rocking pier based on the tumbler principle as claimed in claim 1, wherein: go up and all be provided with PVC reservation hole two on pendulum (2) and lower pendulum (1) correspondingly, install in PVC reservation hole two power consumption reinforcing bar (7), PVC reservation hole two all is provided with a plurality ofly with power consumption reinforcing bar (7), PVC reservation hole two all is the ring form with power consumption reinforcing bar (7) and distributes on the cushion cap.
5. The rocking pier based on the tumbler principle as claimed in claim 1, wherein: the upper end and pier (3) top of unbonded prestressed reinforcement (4) are connected, the lower extreme and the cushion cap lower hem (1) of unbonded prestressed reinforcement (4) are connected, the upper end of power consumption reinforcing bar (7) is connected through last pendulum (2) of high strength bolt and cushion cap, the lower extreme of power consumption reinforcing bar (7) is connected through the bottom of from locking-type one-way bolt and cushion cap lower hem (1), power consumption reinforcing bar (7) distribute in the both sides of cushion cap.
6. The rocking pier based on the tumbler principle as claimed in claim 5, wherein: the bottom of the unbonded prestressed reinforcement (4) is provided with a prestressed reinforcement fixed end anchorage, and the top of the unbonded prestressed reinforcement (4) is provided with a prestressed reinforcement tensioning end anchorage.
7. A rocking pier based on the tumbler principle as claimed in claim 1, wherein: pier (3) top is provided with recess one (10), lower hem (1) bottom is provided with recess two (9) and a plurality of recess three (8), install in recess one (10) in the upper end of unbonded prestressing steel (4), the lower extreme of unbonded prestressing steel (4) is installed in recess two (9), the lower extreme of power consumption reinforcing bar (7) is installed in recess three (8).
8. The rocking pier based on the tumbler principle as claimed in claim 7, wherein: a first matched steel base plate is arranged in the first groove (10), a second matched steel base plate is arranged in the second groove (9), and a third matched steel base plate is arranged in the third groove (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677934.3A CN114892509A (en) | 2022-06-15 | 2022-06-15 | Rocking pier based on tumbler principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677934.3A CN114892509A (en) | 2022-06-15 | 2022-06-15 | Rocking pier based on tumbler principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114892509A true CN114892509A (en) | 2022-08-12 |
Family
ID=82728906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210677934.3A Withdrawn CN114892509A (en) | 2022-06-15 | 2022-06-15 | Rocking pier based on tumbler principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114892509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289509A (en) * | 2023-03-23 | 2023-06-23 | 天津大学 | Multistage limiting-self-resetting element for full-assembled bridge of swinging bearing platform |
-
2022
- 2022-06-15 CN CN202210677934.3A patent/CN114892509A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289509A (en) * | 2023-03-23 | 2023-06-23 | 天津大学 | Multistage limiting-self-resetting element for full-assembled bridge of swinging bearing platform |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220812 |