CN114382004A - Self-reset double-column pier system with replaceable shearing energy consumption device - Google Patents
Self-reset double-column pier system with replaceable shearing energy consumption device Download PDFInfo
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- CN114382004A CN114382004A CN202210065605.3A CN202210065605A CN114382004A CN 114382004 A CN114382004 A CN 114382004A CN 202210065605 A CN202210065605 A CN 202210065605A CN 114382004 A CN114382004 A CN 114382004A
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- pier
- energy consumption
- self
- consumption device
- shear
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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
-
- 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
Abstract
The invention discloses a self-resetting double-column pier system with a replaceable shearing energy consumption device, which belongs to the technical field of bridge engineering and comprises an upper structure, a lower structure and a bearing platform, wherein the lower structure is used for supporting the upper structure, the lower structure comprises a left supporting system and a right supporting system which are symmetrically arranged, the left supporting system comprises a cover beam and a pier fixedly supported at the bottom of the cover beam, the shearing energy consumption device is connected between the cover beams of the left supporting system and the right supporting system, the pier and the bearing platform are connected in a swinging mode, and the shearing energy consumption device consumes energy when the cover beams of the left supporting system and the right supporting system are relatively displaced. By adopting the bridge system, the energy consumption efficiency of the energy consumption device can be fully exerted, and the energy consumption capability of the bridge pier and the reset force and the anti-overturning capability of the bridge pier can be improved.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a self-resetting double-column pier system with a replaceable shearing energy consumption device.
Background
Traditional double column pier is according to ductility antidetonation design, though can guarantee that the pier does not collapse under the earthquake, nevertheless the earthquake can lead to pier plasticity hinge district serious damage, produces great residual displacement simultaneously, is unfavorable for the quick recovery after shaking.
The self-resetting double-column pier connected by the post-tensioned prestressed tendons loosens the restraint between the pier bottom and the bearing platform, allows the pier to swing under the action of an earthquake and improves the self-resetting capability of the pier. In order to improve the energy consumption capability, an external energy consumption device is required. However, the existing external energy consumption devices are generally arranged near the swing interface between the pier bottom and the pier top, when the horizontal displacement of the pier is small, the energy consumption devices are small in deformation and weak in energy consumption capability, and along with the increase of the horizontal displacement of the pier, the deformation of the energy consumption devices is slowly increased, so that the energy consumption capability of the energy consumption devices cannot be fully exerted. In addition, the conventional swing pier has a large overturning danger because the overturning displacement is small after swinging, and although the prestressed tendons are adopted to provide extra restoring force for the pier, the inspection and the replacement of the prestressed tendons are difficult. Therefore, how to improve the deformation of the energy dissipation device when the horizontal displacement of the pier is small and give full play to the energy dissipation capacity of the energy dissipation device is an urgent problem to be solved in the next work.
Disclosure of Invention
In view of the above, the present invention provides a self-resetting dual-column pier system with a replaceable shearing energy dissipation device, which can fully exert the energy dissipation efficiency of the energy dissipation device, and can also improve the energy dissipation capability of a pier and the restoration force and the anti-overturning capability of the pier.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention relates to a self-resetting double-column pier system with a replaceable shearing energy consumption device, which comprises an upper structure, a lower structure and a bearing platform, wherein the lower structure is used for supporting the upper structure, the lower structure comprises a left supporting system and a right supporting system which are symmetrically arranged, the left supporting system comprises a cover beam and a pier fixedly supported at the bottom of the cover beam, the shearing energy consumption device is connected between the cover beams of the left supporting system and the right supporting system, the pier and the bearing platform are connected in a swinging mode, and the shearing energy consumption device consumes energy when the cover beams of the left supporting system and the right supporting system are relatively displaced.
Furthermore, the two ends of the shearing energy consumption device are detachably connected with the cover beams of the left support system and the right support system respectively.
Furthermore, the shearing energy consumption device comprises a shearing energy consumption section and connecting end plates fixedly arranged at two ends of the shearing energy consumption section, a pre-buried screw rod and a connecting sleeve are pre-buried in the inner side of the bent cap, one end of the connecting sleeve is connected to the pre-buried screw rod, and the other end of the connecting sleeve is connected to the connecting end plates through an anchoring bolt.
Furthermore, protective concrete is arranged on the outer side of the shearing energy consumption device, and the compressive strength of the protective concrete is smaller than that of the pier and the capping beam.
Further, be provided with the preformed hole at the bottom of the pier, pre-buried on the cushion cap has the shear pin, the upper end of shear pin is deepened in the preformed hole of pier, the size in preformed hole is greater than the size of shear pin, the length that the shear pin buries in the cushion cap is greater than the length of deepening the pier bottom.
Further, the outside parcel that upwards extends a take the altitude of pier bottom of pier has the steel sheet.
Further, the left support system further comprises at least two supports, the supports are arranged between the cover beam and the upper structure, and the distance from the support located on the cantilever section on the outer side of the cover beam to the pier is larger than the distance from the support located on the inner side of the cover beam to the pier.
Furthermore, the upper structure comprises a plurality of T-shaped beams arranged in parallel and transverse partition beams connected with the T-shaped beams, the number of the T-shaped beams is equal to that of the supports, and the supports and the T-shaped beams are supported in a one-to-one correspondence mode.
Furthermore, a reinforcing longitudinal rib is arranged in the bent cap and arranged on the upper part of the inner side of the bent cap in parallel.
Furthermore, the pier and the capping beam are cast in place or prefabricated into a whole.
The invention has the beneficial effects that:
according to the self-resetting double-column pier system with the replaceable shearing energy consumption device, the capping beam is divided into a left symmetrical part and a right symmetrical part, the two parts are connected through the shearing energy consumption device, and when the pier swings, the device provided by the invention utilizes large relative displacement between the two sections of capping beams, so that the shearing energy consumption of the shearing energy consumption device is fully utilized, and the energy consumption capability of the system is improved; after the earthquake, the damaged energy consumption device can be conveniently detached and installed again, and the replacement property is better.
According to the double-column pier system, the bearing platform and the pier column are disconnected, when the pier swings under the action of an earthquake, self-resetting capability can be provided through the self-weight of the upper structure, and the resetting capability of the pier is improved due to the stress change of the capping beam after swinging, so that the anti-overturning capability of the system can be improved under the condition that no unbonded prestressed tendon is adopted.
Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
fig. 1 is a front view of a pier system according to the present invention;
FIG. 2 is a front view of a pier system according to the present invention after deformation;
FIG. 3 is a partially enlarged schematic view of a pier bottom in the bridge pier system of the present invention;
FIG. 4 is a schematic view of the main girder stress when the bridge pier system of the present invention is not swayed;
FIG. 5 is a schematic diagram of the main beam stress after the bridge pier system swings;
FIG. 6 is a schematic view of the bent cap stress when the bridge pier system is not swayed;
fig. 7 is a schematic diagram of the capping beam stress after the pier system swings.
The drawings are numbered as follows: the steel plate shear comprises a capping beam 1, a pier 2, a cushion cap 3, a shearing energy consumption device 4, an upper main beam 5, a support 6, a cushion 7, an anchor bolt 8, a connecting sleeve 9, a pre-embedded screw 10, protective concrete 11, an outer-coated steel pipe 12, a shear pin 13, a preformed hole 14 and a reinforcing longitudinal rib 15.
Detailed Description
As shown in fig. 1, the self-resetting double-column pier system with the replaceable shearing energy dissipation device 4 of the invention comprises an upper structure, a lower structure for supporting the upper structure and a bearing platform 3, wherein the lower structure comprises a left support system and a right support system which are symmetrically arranged, the left support system and the right support system have the same structure, taking a left support system as an example, the left support system comprises a cover beam 1 and a pier 2 fixedly supported at the bottom of the cover beam 1, the shearing energy dissipation device 4 is connected between the cover beams 1 of the left support system and the right support system, and the bearing platform 3 is disconnected from the pier 2, so that the pier 2 is connected with the bearing platform 3 in a swinging manner; the swing connection means that the bearing platform 3 and the bottom of the pier 2 are disconnected from each other so that a certain deflection can occur therebetween during an earthquake, and the bearing platform 3 is directly connected to and engaged with the pier 2. The shearing energy consumption device 4 consumes energy when the bent cap 1 of the left support system and the bent cap 1 of the right support system are in relative displacement. The device is equivalent to the fact that a conventional bent cap 1 is divided into two sections with the same left and right geometric dimensions, wherein the right end of the left bent cap 1 and the left end of the right bent cap 1 are respectively connected with the left end and the right end of a shearing energy consumption device 4, and the shearing energy consumption device 4 is located in the center of the combined bent cap 1.
In the embodiment, two ends of the shearing energy consumption device 4 are respectively detachably connected with the bent caps 1 of the left support system and the right support system, when the energy consumption device is damaged under the action of an earthquake, the shearing energy consumption device 4 can be replaced to ensure the anti-seismic effect of the subsequent bridge, in particular, the shearing energy consumption device 4 comprises a shearing energy consumption section and connecting end plates fixedly arranged at the two ends of the shearing energy consumption section, the shearing energy consumption section can be formed by splicing a plurality of steel plates, an embedded screw 10 and a connecting sleeve 9 are embedded in the inner side of the bent cap 1, one end of the connecting sleeve 9 is connected to the embedded screw 10, the other end of the connecting sleeve 9 is connected to the connecting end plate through an anchor bolt 8, and when the shearing energy dissipation device 4 is damaged under the action of an earthquake, the anchor bolts 8 can be unscrewed and replaced with new shear energy dissipation devices 4, and the system has good replaceability.
In this embodiment, the outside of shearing energy consumption device 4 is provided with protective concrete 11, can guarantee that shearing energy consumption device 4 does not receive the environmental impact under normal use condition and erode, guarantees its power consumption effect, protective concrete 11's compressive strength is less than pier 2 and bent cap 1's compressive strength, avoids protective concrete 11 to shearing energy consumption device 4 influence of warping, makes it exert better effect when pier 2 sways.
In this embodiment, as shown in fig. 3, a preformed hole 14 is formed in the bottom of the pier 2, and may be reserved in a steel pipe manner, a shear pin 13 is pre-embedded in the bearing platform 3, the upper end of the shear pin 13 extends into the preformed hole 14 of the pier 2, the size of the preformed hole 14 is greater than that of the shear pin 13, and the length of the shear pin 13 embedded in the bearing platform 3 is greater than that of the bottom of the pier 2. The outer side of pier bottom upwards extension a take the altitude of 2 wraps up there is the steel sheet.
In this embodiment, the left support system further includes at least two supports 6, wherein 7 is a pad, the supports 6 are disposed between the capping beam 1 and the superstructure, and a distance from the support 6 located at the cantilever section outside the capping beam 1 to the pier 2 is greater than a distance from the support 6 located inside the capping beam 1 to the pier 2. After the pier 2 swings, as shown in fig. 7, the support at the outer cantilever section of the bent cap 1 will be subjected to a small vertical force, in order to ensure that the two piers 2 after swinging have the same restoring moment, the distance from the support 6 arranged on the cantilever section of each bent cap 1 to the pier 2 is greater than the distance from the support 6 at the middle section to the pier 2, and the specific numerical value is obtained according to calculation.
In this embodiment, the upper structure includes a plurality of T-shaped beams arranged in parallel and a diaphragm beam connected to the T-shaped beams, the number of the T-shaped beams is equal to the number of the supports 6, and the supports 6 support the T-shaped beams in a one-to-one correspondence. The superstructure consists of 4T-beams, below each of which is placed a support 6. After the pier 2 swings, as shown in fig. 2, a part of the support 6 on the left and right capping beams 1 is biased or released, and only one support 6 on each of the two capping beams 1 bears the weight of the upper part, and at this time, the vertical forces on the two capping beams 1 may be different, so that the main beam may have a certain inclination angle. As shown in fig. 5. Two supports 6 are provided on each part of the lid beam 1 for the upper weight in normal use, as shown in fig. 4 and 6. Therefore, the counterforce of the support 6 after swinging is larger than that of the support 6 in a normal use state, and in addition, because the distance between the two forces and the swinging point of the pier bottom is farther, a larger restoring moment is generated for the pier 2, and compared with the traditional swinging pier 2, the restoring moment is larger, and a better self-resetting effect is achieved. Compared with the traditional swing pier 2, the horizontal distance from the stress point of the middle bent cap 1 to the swing point of the pier bottom is longer, and the horizontal displacement of the pier 2 during overturning is larger, so that the system has higher anti-overturning capacity.
In this embodiment, a reinforcing longitudinal rib 15 is arranged in the bent cap 1, and the reinforcing longitudinal rib 15 is arranged on the upper portion of the inner side of the bent cap 1 in parallel, so as to ensure that the cantilever section is not bent and damaged. The bridge pier 2 and the capping beam 1 are cast in place or prefabricated into a whole, so that the bridge is prevented from swinging.
After the pier 2 swings, as shown in fig. 2, even if the swing angle is small, because the bent cap 1 and the pier 2 are equivalent to a displacement amplifying device, a large relative displacement can be generated between the right end of the left bent cap 1 and the left end of the right bent cap 1, and the shearing energy dissipation device 4 installed between the bent caps 1 can generate a large shearing deformation, so that the seismic energy can be dissipated more efficiently. Compared with an internal energy consumption steel bar or an external energy consumption steel bar arranged at a swing interface of the traditional swing pier, the shearing energy consumption device 4 can consume energy more efficiently, so that the energy consumption capacity of the pier 2 is improved.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a from restoring to throne double column mound system with removable shearing energy consumption device, includes superstructure, is used for supporting superstructure's substructure and cushion cap, its characterized in that: the left side support system and the right side support system that the substructure set up including the symmetry, the left side support system includes bent cap, fixed stay and is in bent cap bottom pier, be connected with between the bent cap of left side support system and right branch brace system and cut the power consumption device, the pier with swing between the cushion cap and be connected, cut the power consumption device and carry out the power consumption when taking place relative displacement between the bent cap of left side support system and right branch brace system.
2. The self-resetting dual pier system with replaceable shear dissipating energy of claim 1, wherein: and two ends of the shearing energy consumption device are detachably connected with the bent caps of the left support system and the right support system respectively.
3. The self-resetting dual pier system with replaceable shear dissipating energy of claim 2, wherein: the shearing energy consumption device comprises a shearing energy consumption section and connecting end plates fixedly arranged at two ends of the shearing energy consumption section, a pre-buried screw rod and a connecting sleeve are pre-buried in the inner side of the bent cap, one end of the connecting sleeve is connected to the pre-buried screw rod, and the other end of the connecting sleeve is connected to the connecting end plates through an anchoring bolt.
4. The self-resetting dual pier system with replaceable shear energy dissipating devices of claim 3, wherein: the outer side of the shearing energy consumption device is provided with protective concrete, and the compressive strength of the protective concrete is smaller than that of the pier and the capping beam.
5. The self-resetting dual pier system with replaceable shear dissipating energy of claim 1, wherein: the pier bottom of pier is provided with the preformed hole, pre-buried on the cushion cap has the shear pin, the upper end of shear pin is deep in the preformed hole of pier, the size in preformed hole is greater than the size of shear pin, the length that the shear pin buries in the cushion cap is greater than the length of deep pier bottom.
6. The self-resetting dual pier system with replaceable shear energy dissipating devices of claim 5, wherein: the outer side of the pier bottom of the pier, which extends upwards to a certain height, is wrapped with a steel plate.
7. The self-resetting dual pier system with replaceable shear dissipating energy of claim 1, wherein: the left support system further comprises at least two supports, the supports are arranged between the cover beam and the upper structure, and the distance from the support located on the cantilever section on the outer side of the cover beam to the pier is larger than the distance from the support located on the inner side of the cover beam to the pier.
8. The self-resetting dual pier system with replaceable shear dissipating energy of claim 7, wherein: the upper structure comprises a plurality of T-shaped beams arranged in parallel and transverse partition beams connected with the T-shaped beams, the number of the T-shaped beams is equal to that of the supports, and the supports and the T-shaped beams are supported in a one-to-one correspondence mode.
9. The self-resetting dual pier system with replaceable shear dissipating energy of claim 1, wherein: and a reinforcing longitudinal rib is arranged in the bent cap and is arranged on the upper part of the inner side of the bent cap in parallel.
10. The self-resetting dual pier system with replaceable shear dissipating energy of claim 1, wherein: the pier and the capping beam are cast in place or prefabricated into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065605.3A CN114382004A (en) | 2022-01-20 | 2022-01-20 | Self-reset double-column pier system with replaceable shearing energy consumption device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065605.3A CN114382004A (en) | 2022-01-20 | 2022-01-20 | Self-reset double-column pier system with replaceable shearing energy consumption device |
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| CN114382004A true CN114382004A (en) | 2022-04-22 |
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| CN202210065605.3A Pending CN114382004A (en) | 2022-01-20 | 2022-01-20 | Self-reset double-column pier system with replaceable shearing energy consumption device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016118430A1 (en) * | 2015-01-24 | 2016-07-28 | Su Hao | Seismic-proof connectors to protect buildings and bridges from earthquake hazards and enable fast construction |
| CN108660914A (en) * | 2018-05-28 | 2018-10-16 | 北京工业大学 | A kind of queen post using TMD glissandoes waves bridge pier structure |
| CN108729343A (en) * | 2018-05-24 | 2018-11-02 | 西南交通大学 | It can restore assembled energy consumption stub structure after a kind of shake |
| CN208830474U (en) * | 2018-09-12 | 2019-05-07 | 西安建筑科技大学 | A kind of replaceable shearing-type energy-consumption beam section-steel deep beam connection structure |
| CN110042745A (en) * | 2019-05-16 | 2019-07-23 | 兰州交通大学 | Antidetonation bridge pier component |
| CN110541354A (en) * | 2019-09-30 | 2019-12-06 | 大连理工大学 | Single-section prefabricated anti-seismic pier and construction method thereof |
| CN214993017U (en) * | 2021-01-11 | 2021-12-03 | 深圳市天健(集团)股份有限公司 | Assembled pier that possesses from restoring to throne and consume energy by force |
| CN215441415U (en) * | 2021-04-20 | 2022-01-07 | 福建工大岩土工程研究所有限公司 | Quick-connect combined column pier structure |
-
2022
- 2022-01-20 CN CN202210065605.3A patent/CN114382004A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016118430A1 (en) * | 2015-01-24 | 2016-07-28 | Su Hao | Seismic-proof connectors to protect buildings and bridges from earthquake hazards and enable fast construction |
| CN108729343A (en) * | 2018-05-24 | 2018-11-02 | 西南交通大学 | It can restore assembled energy consumption stub structure after a kind of shake |
| CN108660914A (en) * | 2018-05-28 | 2018-10-16 | 北京工业大学 | A kind of queen post using TMD glissandoes waves bridge pier structure |
| CN208830474U (en) * | 2018-09-12 | 2019-05-07 | 西安建筑科技大学 | A kind of replaceable shearing-type energy-consumption beam section-steel deep beam connection structure |
| CN110042745A (en) * | 2019-05-16 | 2019-07-23 | 兰州交通大学 | Antidetonation bridge pier component |
| CN110541354A (en) * | 2019-09-30 | 2019-12-06 | 大连理工大学 | Single-section prefabricated anti-seismic pier and construction method thereof |
| CN214993017U (en) * | 2021-01-11 | 2021-12-03 | 深圳市天健(集团)股份有限公司 | Assembled pier that possesses from restoring to throne and consume energy by force |
| CN215441415U (en) * | 2021-04-20 | 2022-01-07 | 福建工大岩土工程研究所有限公司 | Quick-connect combined column pier structure |
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