CN108978446B - Self-resetting energy consumption structure suitable for bridge - Google Patents
Self-resetting energy consumption structure suitable for bridge Download PDFInfo
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- CN108978446B CN108978446B CN201811140757.5A CN201811140757A CN108978446B CN 108978446 B CN108978446 B CN 108978446B CN 201811140757 A CN201811140757 A CN 201811140757A CN 108978446 B CN108978446 B CN 108978446B
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- stop block
- bridge
- bridge span
- movable stop
- bent cap
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 14
- 210000002435 tendon Anatomy 0.000 claims abstract description 19
- 230000035939 shock Effects 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 230000008439 repair process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- E01D19/04—Bearings; Hinges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the technical field of energy consumption and shock absorption of bridge structures, and discloses a self-resetting energy consumption structure suitable for a bridge, which comprises the following components: the shock insulation support is connected with the bridge span and the bent cap; the energy-consumption damper is connected with the bridge span and the bent cap; and the reset assembly comprises a prestressed rib penetrating through a gap between the bridge span and the bent cap, a first movable stop block and a second movable stop block which are arranged at two ends of the prestressed rib and respectively abut against the bent cap and the bridge span, and an anchorage device which is arranged on the prestressed rib and is used for anchoring the first movable stop block and the second movable stop block. The beneficial effects of the invention include: the transverse displacement of the bridge is limited by adopting the flexible combination of the stop block and the prestressed tendons, the transverse beam falling is prevented, meanwhile, the bridge span and the bent cap can be allowed to slide, so that the earthquake acting force transmitted to the bridge span and the bridge pier and the pile foundation is reduced, the damage of the earthquake to the bridge is reduced, the prestressed tendons provide restoring force, the self-resetting function is realized, and the repairing cost and period are reduced.
Description
Technical Field
The invention relates to the technical field of energy consumption and shock absorption of bridge structures, in particular to a self-resetting energy consumption structure suitable for a bridge.
Background
China is a region with frequent earthquakes, and is located in the diving zone of the Pacific plate and the sub-European plate and the collision zone of the Indian plate and the sub-European plate, so that the crust movement is active. The damage of earthquake is extremely great, and huge life and economic losses are brought to China. The bridge is used as an important component part of life line engineering and plays a role of a transportation junction and an important node, and is also the part which is most easily damaged and is most difficult to repair in an earthquake, and whether the earthquake relief is beneficial or not is related, so that the representation of the bridge in the earthquake and the rapid repair after the earthquake are important.
The continuous beam bridge comprises a bridge span, a capping beam, a pier and a support, wherein the capping beam is fixedly connected with the pier at the upper end of the pier, and the bridge span is arranged on the capping beam through the support.
In order to reduce the damage of the bridge in the earthquake, the current common practice is to arrange shockproof stop blocks at two sides of the bridge pier top or two sides of the capping beam, restrict the transverse displacement of the bridge span and prevent the transverse beam falling. The design of the stop block is strong enough, so that the stop block is safe, the expected effect can be achieved in middle and small earthquakes, but in large earthquakes, the stop block is strong again, the stop block cannot be considered as an effect, the stop block is impacted or extruded by a bridge span to be damaged, the stop block is too strong, the earthquake acting force transmitted to the lower bent cap, the bridge pier and the pile foundation can be increased, larger damage is generated, the bridge is difficult to repair, and even the bridge is invalid. The stopper is designed into a thin and high flexible reinforced concrete block, and can be cut off at a base fixedly connected with a capping beam or a pier due to extrusion of a bridge span (bridge body), so that large residual displacement and even beam falling can be generated. For example, in the China of Wenchuan earthquake in 2008, a large number of bridge stops are seriously damaged, a bridge is subjected to large residual displacement, a bridge pier is damaged, and even a beam falls and collapses.
Disclosure of Invention
The invention aims to overcome the technical defects, provides a self-resetting energy consumption structure suitable for a bridge, and solves the technical problem that the prior art lacks of effectively restraining the transverse displacement of a bridge span.
In order to achieve the technical purpose, the technical scheme of the invention provides a self-resetting energy consumption structure suitable for a bridge, which comprises the following components:
the shock insulation support is connected with the bridge span and the bent cap;
the energy-consumption damper is connected with the bridge span and the bent cap; and
The reset assembly comprises a prestressed rib penetrating through a gap between the bridge span and the bent cap, a first movable stop block and a second movable stop block which are arranged at two ends of the prestressed rib and respectively abut against the bent cap and the bridge span, and an anchorage device which is arranged on the prestressed rib and used for anchoring the first movable stop block and the second movable stop block.
Compared with the prior art, the invention has the beneficial effects that: the transverse displacement of the bridge is limited by adopting the flexible combination of the stop blocks and the prestressed tendons, the transverse girder falling is prevented, meanwhile, the bridge span and the bent cap can be allowed to slide, the earthquake acting force transmitted to the lower structure by the bridge span is reduced by the flexible rigid, the bridge span has a certain protection effect on piers, pile foundations and the like, the self-resetting capability is realized in the designed displacement, the repairing cost is reduced, and the bridge is suitable for the design and construction of a newly-built bridge and the reconstruction and reinforcement of the existing bridge.
Drawings
Fig. 1 is a front view of embodiment 1;
FIG. 2 is a schematic illustration of an embodiment 1 when the bridge span is displaced relative to the cap beam;
FIG. 3 is a schematic view of another state of example 1 when the bridge span is displaced relative to the cap beam;
FIG. 4 is a left side view of example 2;
fig. 5 is a front view of embodiment 3;
FIG. 6 is a schematic illustration of an embodiment 3 when the bridge span is displaced relative to the cap beam;
FIG. 7 is a schematic view of another state of example 3 when the bridge span is displaced relative to the cap beam;
FIG. 8 is a schematic view showing a state of the first movable stopper in embodiment 3;
FIG. 9 is a schematic view showing another state of the first movable stopper in embodiment 3;
fig. 10 is an assembled schematic view of a U-shaped mild steel damper.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a self-resetting energy consumption structure suitable for a bridge, which is shown in figures 1-3 and comprises a shock insulation support 4, an energy consumption damper 5 and a resetting component 6.
And the shock insulation support 4 is used for connecting the bridge span 1 and the bent cap 2.
The energy dissipation damper 5 connects the bridge span 1 and the bent cap 2.
The reset assembly 6 comprises a prestress rib 61 penetrating through a gap between the bridge span 1 and the bent cap 2, a first movable stop block 62 and a second movable stop block 63 which are arranged at two ends of the prestress rib 61 and respectively abut against the bent cap 2 and the bridge span 1, and an anchor 64 which is arranged on the prestress rib 61 and is used for anchoring the first movable stop block 62 and the second movable stop block 63.
At the juncture section of bridge span 1 and pier 3, the bent cap 2 side at pier 3 top flushes with bridge span 1 side, arranges first movable dog 62 and second movable dog 63, wears prestressing tendons 61 in the clearance between bridge span 1 and bent cap 2, and prestressing tendons 61 one end is anchored on first movable dog 62 through ground tackle 64, and the other end passes second movable dog 63, stretches to predetermined pulling force through the jack of punching, utilizes ground tackle 64 anchor on second movable dog 63, with the dog pre-compaction in both sides of bent cap 2 and bridge span 1. When an earthquake comes, the bridge span 1 and the bridge pier 3 generate transverse displacement, the prestressing tendons 61 apply pretension previously, and meanwhile, the transverse dislocation of the bridge span 1 and the bent cap 2 forces the prestressing tendons 61 to stretch, so that the prestressing tendons 61 deform to generate larger restoring force, the restoring force is transmitted to the bridge span 1 through the stop block, the restoring force is provided for the bridge span 1, and the transverse relative displacement between the bridge span 1 and the bent cap 2 is reduced or even eliminated. When the bridge span 1 and the bridge pier 3 are subjected to transverse relative displacement in the earthquake process and in the free vibration period of the bridge after the earthquake is finished, the prestressed tendons 61 drive the movable stop blocks to pull the bridge span 1 back to the balance position relative to the bent cap 2, so that the self-resetting function is realized. The reset component 6 applies a certain pre-pressure (namely a reset force) to the bridge span 1, the shock insulation support 4 hardly slides under the action of E1 earthquake, and the bridge span 1 has larger initial horizontal transverse rigidity; the reset component 6 plays a reset role under the action of an earthquake, the horizontal transverse rigidity of the bridge span 1 is provided by the prestressed tendons 61 and the shock insulation support 4, the rigidity is small, the sufficient deformability and the reset capability are provided, and the excellent performance of resisting the large earthquake is provided.
Preferably, the first movable stopper 62 and the second movable stopper 63 include stopper bodies (62 a,63 a), respectively, and damping shims (62 b,63 b) provided on the stopper surfaces of the stopper bodies. The damping gasket is used for buffering the impact between the movable stop block and the end parts of the bridge span 1 and the bent cap 2, consuming and absorbing energy and reducing damage.
Preferably, the damping gaskets (62 b,63 b) are damping rubber gaskets, preferably high damping rubber gaskets.
Preferably, the shock insulation support 4 is at least one of a lead shock insulation rubber support for a bridge, a basin-type rubber support and a friction pendulum support. The shock insulation support 4 can be a shock insulation rubber support or a friction pendulum support and the like, has small horizontal rigidity and large vertical rigidity, and has excellent performances of good horizontal shock insulation performance and high vertical bearing capacity. The reset component applies a certain pre-pressure (reset force) to the bridge span 1, the bridge span 1 and the bent cap 2 hardly generate relative displacement under the action of E1 earthquake, and the bridge span 1 has larger initial horizontal transverse rigidity and stability; under the action of E2 earthquake, as shown in FIG. 2, when the extrusion force of the bridge span 1 to the stop blocks exceeds the pretension force of the prestressing tendons, the extruded stop blocks and the end parts of the capping beams on the same side with the direction of the horizontal transverse movement trend of the bridge span 1 are separated, meanwhile, the stop blocks on the other side are separated from the bridge span 1, the horizontal transverse rigidity of the bridge span is provided with rigidity by the prestressing tendons 61 and the shock insulation support 4, the rigidity is small, the bridge span has enough deformability and resetting capability, and the bridge span has excellent performances of resisting large shock.
Preferably, the bottom of the bridge span 1 is provided with a bridge span additional cross beam 11 which is arranged in parallel with the capping beam 2, and the first movable stop block 62 and the second movable stop block 63 also abut against the bridge span additional cross beam 11. The movable stop block is abutted against the bridge span additional cross beam 11, so that the stress surface of the bridge span 1 can be increased, and the force application of the movable stop block is more stable and effective.
Preferably, as shown in fig. 4, the prestressing tendons 61 have three positions, one position is located in the gap between the bottom of the bridge span 1 and the bent cap 2, and the other two positions are respectively located in the gap between the two sides of the bent cap 2 and the bridge span additional cross beam 11. The number of the prestressing tendons 61 is increased, the prestressing force and the restoring force can be improved, and the prestressing tendons 61 are symmetrically arranged, so that the stress of the movable stop blocks can be uniform. Of course, a greater number of tendons 61 may be arranged as desired.
Preferably, the prestressing tendons 61 are 1860-level prestressing steel strands.
Preferably, the energy dissipation damper 5 is a U-shaped soft steel damper, as shown in fig. 10.
Preferably, the prestress rib 61 is sleeved with a high-density polyethylene (HDPE) protective sleeve for corrosion prevention.
Preferably, the first movable stop block 62 and the second movable stop block 63 anchor the prestressed rib area to be smeared with anti-corrosive grease, and the hood cover is closed.
In order to prevent the movable stop block from being taken away when the bridge span 1 moves longitudinally and horizontally relative to the bent cap 2 and from being longitudinally and horizontally displaced relative to the bent cap 2, the stop block is influenced to restore to the initial position, the following improvement is proposed, namely: as shown in fig. 5 to 7, preferably, the first movable stopper 62 and the second movable stopper 63 further include stoppers (62 c,63 c) provided on the stopper body blocking surface and connected to the damping pad, respectively, and the stopper body is hinged to the capping beam 2. This action not only can prevent that movable dog from being taken away, can also further improve this self-resetting power consumption structure's deformability, namely: according to the geometric relationship (see fig. 6), the relative positions of the anchoring point of the prestressed rib 61, the stop block-bridge span contact point and the stop block-bent cap hinge point can be flexibly adjusted, when the stop block rotates relative to the bent cap, the horizontal displacement of the stop block-bridge span contact point is larger than that of the anchoring point of the prestressed rib 61, and the deformation capacity of the self-resetting energy consumption structure can be improved through reasonable design.
Preferably, as shown in fig. 8 and 9, the first movable stopper 62 and the second movable stopper 63 further include rotation shafts (62 d,63 d) for fixing the tendon 61, respectively, which are hinged to the stopper body (i.e., the rotation shaft 62d is hinged to the stopper body 62a, and the rotation shaft 63d is hinged to the stopper body 63 a). When the stress of the stop blocks deviates, the rotating shafts (62 d,63 d) of the prestressed ribs 61 and the two stop blocks can rotate in a follow-up mode so as to adapt to the stress change of the connection positions of the prestressed ribs 61 and the two stop blocks, and the stop blocks are prevented from rotating to break the prestressed ribs 61.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (9)
1. A self-resetting energy consuming structure for a bridge, comprising:
the shock insulation support is connected with the bridge span and the bent cap;
the energy-consumption damper is connected with the bridge span and the bent cap; and
The reset assembly comprises a prestress rib penetrating through a gap between the bridge span and the bent cap, a first movable stop block and a second movable stop block which are arranged at two ends of the prestress rib and respectively abut against the bent cap and the bridge span, and an anchor device which is arranged on the prestress rib and used for anchoring the first movable stop block and the second movable stop block; the first movable stop block and the second movable stop block respectively comprise a stop block body, and the stop block body is hinged with the bent cap; the bridge span bottom is provided with a bridge span additional cross beam which is arranged in parallel with the capping beam, and the first movable stop block and the second movable stop block are also abutted against the bridge span additional cross beam.
2. The self-healing energy consuming structure for bridges of claim 1, wherein: the first movable stop block and the second movable stop block respectively comprise damping gaskets arranged on the stop surface of the stop block body.
3. The self-healing energy consuming structure for bridges of claim 2, wherein: the first movable stop block and the second movable stop block respectively comprise a stop hammer which is arranged on the stop surface of the stop block body and is connected with the damping gasket.
4. A self-healing energy consuming structure for bridges according to claim 3, wherein: the first movable stop block and the second movable stop block also respectively comprise a rotating shaft for fixing the prestress rib, and the rotating shaft is hinged with the stop block body.
5. The self-healing energy consuming structure for bridges of claim 2, wherein: the damping gasket is a damping rubber gasket.
6. The self-healing energy consuming structure for bridges of claim 1, wherein: the shock insulation support is at least one of a lead shock insulation rubber support, a basin-type rubber support and a friction pendulum support for a bridge.
7. The self-healing energy consuming structure for bridges of claim 1, wherein: the prestress rib is provided with three parts, one part is positioned in a gap between the bottom of the bridge span and the bent cap, and the other two parts are respectively positioned in gaps between two sides of the bent cap and the additional cross beam of the bridge span.
8. The self-resetting energy consuming structure for a bridge according to any one of claims 1 to 7, wherein: the prestressed tendons are 1860-level prestressed steel strands.
9. The self-resetting energy consuming structure for a bridge according to any one of claims 1 to 7, wherein: the energy dissipation damper is a U-shaped mild steel damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140757.5A CN108978446B (en) | 2018-09-28 | 2018-09-28 | Self-resetting energy consumption structure suitable for bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140757.5A CN108978446B (en) | 2018-09-28 | 2018-09-28 | Self-resetting energy consumption structure suitable for bridge |
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| Publication Number | Publication Date |
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| CN108978446A CN108978446A (en) | 2018-12-11 |
| CN108978446B true CN108978446B (en) | 2024-04-12 |
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| CN201811140757.5A Active CN108978446B (en) | 2018-09-28 | 2018-09-28 | Self-resetting energy consumption structure suitable for bridge |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778722A (en) * | 2019-04-01 | 2019-05-21 | 重庆交通大学 | A kind of T-type Bridge Seismic method |
| CN110777682A (en) * | 2019-12-06 | 2020-02-11 | 湘潭大学 | Anti-seismic reinforcing method for bridge transverse stop block |
| CN110904825A (en) * | 2020-01-10 | 2020-03-24 | 福州大学 | Damper-replaceable flexible main bridge abutment for multistage bridge abutment of integral bridge and application of damper-replaceable flexible main bridge abutment |
| CN114717931B (en) * | 2021-10-29 | 2023-06-09 | 同济大学 | Plane multidirectional energy dissipation and shock absorption device |
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|---|---|---|---|---|
| JP2007239306A (en) * | 2006-03-08 | 2007-09-20 | Tokai Rubber Ind Ltd | Method of mounting base isolation damper |
| CN205501801U (en) * | 2016-04-12 | 2016-08-24 | 兰州理工大学 | A friction damper that restores to throne certainly for beam bridge shock isolation system |
| CN106351113A (en) * | 2016-08-28 | 2017-01-25 | 防灾科技学院 | Earthquake control system of high-speed railway bridge |
| CN106567326A (en) * | 2016-11-14 | 2017-04-19 | 西南交通大学 | Parallel double-rope type damping block having self-reset function |
| CN106758779A (en) * | 2017-01-22 | 2017-05-31 | 重庆交通大学 | Horizontal Seismic anticollision block with auto-reset function |
| CN209010957U (en) * | 2018-09-28 | 2019-06-21 | 武汉理工大学 | A kind of Self-resetting energy-dissipation structure suitable for bridge |
-
2018
- 2018-09-28 CN CN201811140757.5A patent/CN108978446B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239306A (en) * | 2006-03-08 | 2007-09-20 | Tokai Rubber Ind Ltd | Method of mounting base isolation damper |
| CN205501801U (en) * | 2016-04-12 | 2016-08-24 | 兰州理工大学 | A friction damper that restores to throne certainly for beam bridge shock isolation system |
| CN106351113A (en) * | 2016-08-28 | 2017-01-25 | 防灾科技学院 | Earthquake control system of high-speed railway bridge |
| CN106567326A (en) * | 2016-11-14 | 2017-04-19 | 西南交通大学 | Parallel double-rope type damping block having self-reset function |
| CN106758779A (en) * | 2017-01-22 | 2017-05-31 | 重庆交通大学 | Horizontal Seismic anticollision block with auto-reset function |
| CN209010957U (en) * | 2018-09-28 | 2019-06-21 | 武汉理工大学 | A kind of Self-resetting energy-dissipation structure suitable for bridge |
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| CN108978446A (en) | 2018-12-11 |
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