CN114481814A - Restorer for supporting pier swing - Google Patents
Restorer for supporting pier swing Download PDFInfo
- Publication number
- CN114481814A CN114481814A CN202210036905.9A CN202210036905A CN114481814A CN 114481814 A CN114481814 A CN 114481814A CN 202210036905 A CN202210036905 A CN 202210036905A CN 114481814 A CN114481814 A CN 114481814A
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- CN
- China
- Prior art keywords
- seat plate
- pier
- prestressed tendon
- repositor
- upper seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 210000002435 tendon Anatomy 0.000 claims abstract description 37
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 18
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a restorer for supporting the swing of a pier, which comprises a lower seat plate, an upper seat plate and a spherical crown seat plate, wherein a fixed groove is arranged at the center of the bottom of the upper seat plate, a plane boss is arranged in the middle of the lower seat plate, a swing bulge is arranged at the center of the plane boss, and the swing bulge is arranged corresponding to the fixed groove and in clearance fit with the fixed groove; a plurality of rotating ball grooves embedded with the spherical crown seat plate are uniformly distributed on the end surface of the plane boss, and the upper surface of the embedded spherical crown seat plate is higher than the end surface of the plane boss, so that the lower bottom surface of the upper seat plate falls on the upper surface of the spherical crown seat plate; the upper seat plate outside the fixed groove is provided with centrally symmetrical prestressed tendon holes, the planar boss is also provided with a plurality of prestressed tendon stepped holes in a penetrating manner, prestressed tendons are arranged in the prestressed tendon stepped holes, the other end of each prestressed tendon upwards penetrates through the prestressed tendon holes of the lower seat plate, the upper seat plate and the pier, and the tensioning end of each prestressed tendon is fixed at the pier top of the pier.
Description
Technical Field
The invention belongs to the technical field of bridge structure buildings, and particularly relates to a restorer for supporting pier swinging.
Background
The seismic recoverable functional structure is researched on a bridge more, and the swing pier is one of main objects of current research. The typical swinging pier system comprises a concrete pier column, a non-bonding prestressed steel strand and a damper, wherein a dry joint is arranged between the swinging pier and the upper structure and between the swinging pier and the bearing platform, and the upper structure, the pier and the bearing platform are connected into a whole through the non-bonding prestressed steel strand. Seismic energy is dissipated by the bridge piers 'continually opening' and 'closing' the connection with the superstructure and the bearing platform under the action of the earthquake.
In the process of earthquake swing, dry joints are in line contact substantially, stress is concentrated obviously, loss and damage in different degrees can be caused, and difficulties are brought to repair and operation of a bearing platform and a pier after earthquake. Meanwhile, since the pier and the bearing platform are completely supported by the cohesionless prestress and the damper to bear the horizontal force, the former of the two components mainly bears the prestress, and the latter of the two components mainly bears the damping force in the deformation direction, and the two components have no centering and sliding limiting effects; in addition, under the earthquake acting force with an included angle between the longitudinal direction and the transverse direction of the bridge, the swinging fulcrum of the swinging pier is only one point, and the stress concentration is high. The above factors increase the potential safety hazard of the swinging pier under the earthquake to a certain extent.
Disclosure of Invention
In order to solve the problems, the invention provides a restorer for supporting the swinging of a pier, which is positioned between the bottom of the pier and a bearing platform, supports the load of a bridge and the pier under the normal working condition, and horizontally fixes and vertically limits the swinging function of the pier; under earthquake, the pier can be in any direction in a plane, the bridge seismic isolation and reduction effect is realized through the reciprocating swing of the restorer which can be controlled through centering and the energy consumption of the damping device, and the structural seismic response is reduced. The tension force of the prestressed tendons after the earthquake and the self weight of the upper structure of the repositor comprehensively provide a resetting force, so that the self-resetting function of the pier is realized; meanwhile, the bridge pier and the bearing platform of the restorer are convenient to install and connect and easy to replace; the pier bottom and the bearing platform are in surface contact with the restorer all the time, so that the stress is uniform, and the pier bottom and the bearing platform surface can be effectively protected;
the invention is realized by the following technical scheme:
a restorer for supporting pier swinging is arranged between a pier bottom and a bearing platform and comprises a swinging structure, wherein the swinging structure comprises a lower seat plate, an upper seat plate and a spherical crown seat plate, the upper seat plate is positioned above the lower seat plate, a fixed groove is formed in the center of the bottom of the upper seat plate, a plane boss is arranged in the middle of the lower seat plate, a swinging bulge is arranged in the center of the plane boss, and the swinging bulge and the fixed groove are correspondingly arranged and in clearance fit;
a plurality of rotating ball grooves are uniformly distributed on the end surface of the plane boss, the spherical crown seat plate is embedded in the rotating ball grooves, and the upper surface of the embedded spherical crown seat plate is higher than the end surface of the plane boss, so that the lower bottom surface of the upper seat plate falls on the upper surfaces of the plurality of spherical crown seat plates;
the upper seat plate outside the fixed groove is provided with centrosymmetric prestressed tendon holes, the plane boss of the lower seat plate is also vertically provided with a plurality of prestressed tendon stepped holes in a penetrating manner, prestressed tendons are arranged in the prestressed tendon stepped holes, the other end of each prestressed tendon upwards penetrates through the prestressed tendon holes of the lower seat plate, the upper seat plate and the pier, and the tensioning end of each prestressed tendon is fixed at the pier top of the pier.
Further, the restorer also comprises a damping device.
Further, the damping device is arranged between the upper seat plate and the lower seat plate.
Furthermore, the damping device is an annular energy dissipation damper, centrosymmetric energy dissipation device lining plates are arranged on the periphery of the lower seat plate, and the annular energy dissipation damper is connected with the upper seat plate and the energy dissipation device lining plates.
Furthermore, the fixed groove and the swinging protrusion are both in a circular truncated cone shape.
Furthermore, the number of the rotating ball grooves is 4, and the rotating ball grooves are symmetrically arranged at four corners of the plane boss.
Furthermore, the upper seat plate and the lower seat plate are also provided with anchor bolt holes for connecting the pier bottom and the bearing platform, so that the upper seat plate and the lower seat plate are connected with the pier bottom and the bearing platform through anchor bolts.
Furthermore, a plurality of prestressed tendon stepped holes are arranged in a cross-shaped symmetrical mode.
The invention has the beneficial effects that:
1. the restorer provided by the invention is positioned between the pier bottom and the bearing platform, under a normal working condition, vertical load is transmitted to the bearing platform through the pier bottom, the upper seat plate, the spherical crown seat plate and the lower seat plate, horizontal load is transmitted to the bearing platform through the swinging bulge between the upper seat plate and the lower seat plate, and bending moment caused by the horizontal load is jointly born through the prestress beam and the dead weight of an upper structure to prevent the pier from vertically rotating;
2. when an earthquake occurs, the bridge pier can be in a longitudinal bridge direction or a transverse bridge direction and takes the connecting line of the two spherical crown base plates as the axis, 2 spherical crown base plates are used as the swinging surfaces (at least one spherical crown base plate is used as the swinging surface in any other direction), and the fixed groove of the upper base plate is always enveloped with the swinging protrusion of the lower base plate, so that the reciprocating swinging of the bridge pier can be realized by 'centering' control and continuous 'lifting-off' and 'closing', the lateral stiffness of the bridge pier is reduced, and the self-vibration period of the bridge structure is prolonged, so that the shock insulation effect is realized; the damping device is subjected to reciprocating deformation and energy consumption in the swinging process of the pier to play a role in damping; after the earthquake, the self-resetting capability of the structure is provided by the tension force of the prestressed tendons and the self weight of the upper structure of the restorer, so that the bridge is restored;
3. the restorer is connected with the pier bottom and the bearing platform through the anchor bolts, so that the restorer is convenient to install and replace; the pier swings in the restorer, the pier bottom and the bearing platform are in surface contact with the restorer all the time, the stress is uniform, and the pier main body can be effectively protected from being damaged on an interface.
Drawings
FIG. 1 is a sectional view of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view B-B of FIG. 1 of the present invention;
FIG. 3 is a cross-sectional view C-C of FIG. 1 of the present invention;
FIG. 4 is a sectional view of embodiment 2 of the present invention;
the damping device comprises a reference numeral 1, a lower seat plate 101, a swing protrusion 102, a rotating ball groove 103, a prestressed tendon stepped hole 104, an energy consumer lining plate 2, a ball cap seat plate 3, an upper seat plate 301, a fixing groove 302, a prestressed tendon hole 4, a prestressed tendon 5 and a damping device.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the accompanying drawings.
Example 1
As shown in the figure, the restorer for supporting the swing of the pier is arranged between the pier bottom and the bearing platform and comprises a swing structure, wherein the swing structure comprises a lower seat plate 1, an upper seat plate 3 and a hemispherical spherical crown seat plate 2, the upper seat plate 3 is positioned above the lower seat plate 1, and the lower seat plate 1 and the upper seat plate 3 are also provided with anchor bolt holes for connecting the pier bottom and the bearing platform; the restorer is connected with the pier bottom and the bearing platform through the anchor bolt, so that the installation and the replacement are convenient; the pier swings in the restorer, the pier bottom and the bearing platform are in surface contact with the restorer all the time, the stress is uniform, and the pier main body can be effectively protected from being damaged;
a round table type fixing groove 301 is formed in the center of the bottom of the upper seat plate 3, a plane boss is arranged in the middle of the lower seat plate 1, a round table type swinging protrusion 101 is arranged in the center of the plane boss, the swinging protrusion 101 is arranged corresponding to the fixing groove 301, but certain swinging clearance fit is required, so that swinging reciprocating motion of the restorer is not influenced;
the four corners of the plane boss are uniformly distributed with rotating ball grooves 102, the spherical crown seat plate 2 is embedded in the rotating ball grooves 102, and the upper surface of the embedded spherical crown seat plate 2 is higher than the end surface of the plane boss, so that the lower bottom surface of the upper seat plate 3 falls on the upper surfaces of the spherical crown seat plates 2; when an earthquake occurs, the bridge pier can be in a longitudinal bridge direction or a transverse bridge direction and takes the connecting line of the two spherical crown base plates 2 as an axis, the two spherical crown base plates 2 are swing surfaces (at least one spherical crown base plate 2 is taken as a swing surface in any other direction), and the fixed groove 301 of the upper base plate 3 is always enveloped with the swing protrusion 101 of the lower base plate 1, so that the reciprocating swing of the bridge pier can be realized by the continuous 'lifting-off' and 'closing' controlled by 'centering', the lateral stiffness of the bridge pier is reduced, and the self-vibration period of the bridge structure is prolonged, so that the shock insulation effect is realized;
the upper seat plate outside the fixed groove 301 is provided with central symmetrical prestressed tendon holes 302, the plane boss of the lower seat plate 1 is vertically provided with 4 prestressed tendon stepped holes 103 in a penetrating mode, prestressed tendons 4 are arranged in the prestressed tendon stepped holes 103, the other end of each prestressed tendon 4 upwards penetrates through the prestressed tendon holes of the lower seat plate 1, the upper seat plate 3 and the pier, the tensioning end of each prestressed tendon is fixed at the pier top of the pier, the prestressed tendon stepped holes 103 are symmetrically arranged in a crossed mode, and after an earthquake, the self-resetting capability of the structure is provided by the tensioning force of each prestressed tendon 4 and the self-resetting capability of the upper structure of the restorer.
The restorer further comprises a damping device 5, the damping device 5 is arranged between the upper seat plate and the lower seat plate, and the damping device 5 is subjected to reciprocating deformation and energy consumption in the swinging process of the pier to play a role in damping. The damping device 5 is easy to replace even if damaged after an earthquake.
In conclusion, the bridge swinging seismic isolation and reduction repositor provided by the invention can realize vertical bearing, horizontal limiting and vertical rotation prevention under normal working conditions, realize the protection of a bridge structure by swinging seismic isolation and reduction under an earthquake and realize a self-resetting function after the earthquake; meanwhile, the installation and the connection are convenient, and the replacement is easy.
Example 2
As shown in fig. 4, the damping device may be an annular dissipative damper, and a centrosymmetric dissipative lining plate 104 may be further disposed around the lower seat plate 1, and the annular dissipative damper may be connected to the upper seat plate 3 and the dissipative lining plate 104, and the rest is the same as in embodiment 1.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a restorer that support pier rocked which characterized in that: the repositor is arranged between a pier bottom and a bearing platform and comprises a swinging structure, the swinging structure comprises a lower seat plate (1), an upper seat plate (3) and a spherical crown seat plate (2), the upper seat plate (3) is positioned above the lower seat plate (1), a fixed groove (301) is formed in the center of the bottom of the upper seat plate (3), a plane boss is arranged in the middle of the lower seat plate (1), a swinging bulge (101) is arranged in the center of the plane boss, and the swinging bulge (101) and the fixed groove (301) are correspondingly arranged and in clearance fit;
a plurality of rotating ball grooves (102) are uniformly distributed on the end face of the plane boss, the spherical crown seat plate (2) is embedded in the rotating ball grooves (102), and the upper surface of the embedded spherical crown seat plate (2) is higher than the end face of the plane boss, so that the lower bottom surface of the upper seat plate (3) falls on the upper surfaces of the spherical crown seat plates (2);
the upper seat plate outside the fixed groove (301) is provided with centrosymmetric prestressed tendon holes (302), the plane boss of the lower seat plate (1) is vertically provided with a plurality of prestressed tendon stepped holes (103) in a penetrating mode, prestressed tendons (4) are arranged in the prestressed tendon stepped holes (103), the other end of each prestressed tendon (4) upwards penetrates through the prestressed tendon holes of the lower seat plate (1), the upper seat plate (3) and the pier, and the tensioning end of each prestressed tendon hole is fixed to the pier top of the pier.
2. The repositor for supporting pier sway according to claim 1, wherein: the repositor further comprises a damping device (5).
3. The repositor for supporting pier sway according to claim 2, wherein: the damping device (5) is arranged between the upper seat plate and the lower seat plate.
4. The repositor for supporting pier sway according to claim 2, wherein: the damping device is an annular energy dissipation damper, centrosymmetric energy dissipation device lining plates (104) are arranged on the periphery of the lower seat plate (1), and the annular energy dissipation damper is connected with the upper seat plate (3) and the energy dissipation device lining plates (104).
5. The repositor for supporting pier sway according to claim 1, wherein: the fixed groove (301) and the swinging protrusion (101) are both in a circular truncated cone shape.
6. The repositor for supporting pier sway according to claim 1, wherein: the number of the rotating ball grooves (102) is 4, and the rotating ball grooves are symmetrically arranged at four corners of the plane boss.
7. The repositor for supporting pier sway according to claim 1, wherein: the upper seat plate (3) and the lower seat plate (1) are further provided with anchor bolt holes for connecting the pier bottom and the bearing platform, so that the upper seat plate (3) and the lower seat plate (1) are connected with the pier bottom and the bearing platform through anchor bolts.
8. The repositor for supporting pier sway according to claim 1, wherein: the plurality of prestressed tendon stepped holes (103) are arranged in a cross-shaped symmetrical mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210036905.9A CN114481814B (en) | 2022-01-13 | 2022-01-13 | Reset device for supporting pier to swing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210036905.9A CN114481814B (en) | 2022-01-13 | 2022-01-13 | Reset device for supporting pier to swing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114481814A true CN114481814A (en) | 2022-05-13 |
| CN114481814B CN114481814B (en) | 2024-04-19 |
Family
ID=81512818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210036905.9A Active CN114481814B (en) | 2022-01-13 | 2022-01-13 | Reset device for supporting pier to swing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114481814B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396353A (en) * | 2001-07-06 | 2003-02-12 | 姜立平 | Earthquake damping and isolating mechanism |
| JP2005273353A (en) * | 2004-03-26 | 2005-10-06 | Eisaku Hino | Base isolating foundation structure with return mechanism |
| CN206110352U (en) * | 2016-08-19 | 2017-04-19 | 西安建筑科技大学 | Can repair, formula that restores to throne certainly rectangular concrete -filled steel tube frame column base node |
| CN206289529U (en) * | 2016-11-14 | 2017-06-30 | 湖北中广公路勘察设计有限公司 | A kind of multi-functional compound support |
| CN207958978U (en) * | 2017-12-26 | 2018-10-12 | 鲁俊芳 | A kind of highway bridge bearing |
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN109811897A (en) * | 2019-03-20 | 2019-05-28 | 天津城建大学 | A kind of swing resistance to plucking Self-resetting shock isolating pedestal |
| CN112030718A (en) * | 2020-08-06 | 2020-12-04 | 同济大学 | Multistage swing system for quickly connecting prefabricated assembled pier and bearing platform |
| CN112342902A (en) * | 2020-11-06 | 2021-02-09 | 洛阳双瑞特种装备有限公司 | Multipoint support spherical support |
-
2022
- 2022-01-13 CN CN202210036905.9A patent/CN114481814B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396353A (en) * | 2001-07-06 | 2003-02-12 | 姜立平 | Earthquake damping and isolating mechanism |
| JP2005273353A (en) * | 2004-03-26 | 2005-10-06 | Eisaku Hino | Base isolating foundation structure with return mechanism |
| CN206110352U (en) * | 2016-08-19 | 2017-04-19 | 西安建筑科技大学 | Can repair, formula that restores to throne certainly rectangular concrete -filled steel tube frame column base node |
| CN206289529U (en) * | 2016-11-14 | 2017-06-30 | 湖北中广公路勘察设计有限公司 | A kind of multi-functional compound support |
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN207958978U (en) * | 2017-12-26 | 2018-10-12 | 鲁俊芳 | A kind of highway bridge bearing |
| CN109811897A (en) * | 2019-03-20 | 2019-05-28 | 天津城建大学 | A kind of swing resistance to plucking Self-resetting shock isolating pedestal |
| CN112030718A (en) * | 2020-08-06 | 2020-12-04 | 同济大学 | Multistage swing system for quickly connecting prefabricated assembled pier and bearing platform |
| CN112342902A (en) * | 2020-11-06 | 2021-02-09 | 洛阳双瑞特种装备有限公司 | Multipoint support spherical support |
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| Publication number | Publication date |
|---|---|
| CN114481814B (en) | 2024-04-19 |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Applicant after: Tongji University Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. Applicant before: Tongji University |
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