CN114481814B - Reset device for supporting pier to swing - Google Patents
Reset device for supporting pier to swing Download PDFInfo
- Publication number
- CN114481814B CN114481814B CN202210036905.9A CN202210036905A CN114481814B CN 114481814 B CN114481814 B CN 114481814B CN 202210036905 A CN202210036905 A CN 202210036905A CN 114481814 B CN114481814 B CN 114481814B
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- CN
- China
- Prior art keywords
- seat plate
- pier
- prestress
- seat board
- upper seat
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- 238000013016 damping Methods 0.000 claims description 18
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims 4
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 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
- 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
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 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
- 239000010959 steel Substances 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
- 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
Landscapes
- 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 pier swing, which comprises a lower seat plate, an upper seat plate and a spherical crown seat plate, wherein 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 swing protrusion is arranged in the center of the plane boss, and the swing protrusion is correspondingly arranged with the fixed groove and is in clearance fit with the fixed groove; a plurality of rotary ball grooves embedded with the spherical crown seat plate are uniformly distributed on the end face of the plane boss, and the upper surface of the embedded spherical crown seat plate is higher than the end face 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 invention discloses a swinging shock-absorbing and shock-isolating protection bridge structure under an earthquake, which is characterized in that a central symmetrical prestress beam hole is formed in an upper seat plate outside a fixing groove, a plurality of prestress beam stepped holes are formed in a plane boss in a penetrating manner, prestress beams are arranged in the prestress beam stepped holes, the other ends of the prestress beams upwards penetrate through prestress beam holes of a lower seat plate, the upper seat plate and a pier, and tensioning ends of the prestress beams are fixed at the pier tops of the piers.
Description
Technical Field
The invention belongs to the technical field of bridge structure building, and particularly relates to a restorer for supporting pier swing.
Background
Seismic recoverable structures have been studied more on bridges, and rocking piers are one of the main subjects of current research. The typical swing pier system comprises three parts, namely a concrete pier column, a non-bonding prestress steel strand and a damper, wherein a dry joint is arranged between a swing pier and an upper structure and between the swing pier and a bearing platform, and the upper structure, the pier and the bearing platform are connected into a whole through a non-bonding prestress beam. The connection parts of the bridge piers, the upper structure and the bearing platform are continuously opened and closed under the earthquake action, so that earthquake energy is dissipated.
In the earthquake swinging process, the dry joints are in line contact substantially, the stress concentration is obvious, the loss and the damage of different degrees can be caused, and great difficulty is brought to the repair and the operation of the post-earthquake bearing platform and the bridge pier. Meanwhile, the bridge pier and the bearing platform bear horizontal force completely by unbonded prestress and the damper, the two components mainly bear prestress, and the two components mainly bear damping force in the deformation direction, so that the damping device has no centering and sliding limiting effects; in addition, under the earthquake acting force with an included angle with the longitudinal and transverse bridge directions, 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 in the case of a swing pier earthquake to a certain extent.
Disclosure of Invention
In order to solve the problems, the invention provides a restorer for supporting pier swing, which is positioned between the bottom of a pier and a bearing platform, supports a bridge and pier load under normal working conditions, and horizontally and vertically limits the function of pier swing; the bridge pier can realize the vibration reduction and isolation effect of the bridge in any direction in the plane through the reciprocating swinging of the restorer which can be controlled by centering and the energy consumption of the damping device, and the earthquake response of the structure is reduced. The tension of the pre-stress beam after earthquake and the self weight of the upper structure of the restorer comprehensively provide restoring force, so that the pier self-restoring function 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 always in surface contact with the restorer, so that the stress is relatively uniform, and the pier bottom and the bearing platform surface can be effectively protected;
the invention is realized by the following technical scheme:
the restorer is arranged between the pier bottom and the bearing platform and comprises a swinging structure, 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 fixing 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 boss is arranged in the center of the plane boss, and the swinging boss is correspondingly arranged with the fixing groove and in clearance fit with the fixing groove;
The end faces of the plane bosses are uniformly distributed with a plurality of rotary ball grooves, the spherical crown seat plates are embedded in the rotary ball grooves, and the upper surfaces of the embedded spherical crown seat plates are higher than the end faces of the plane bosses, so that the lower bottom faces of the upper seat plates fall on the upper surfaces of the spherical crown seat plates;
The upper seat plate outside the fixing groove is provided with a central symmetrical prestress beam hole, the plane boss of the lower seat plate is further vertically penetrated with a plurality of prestress beam stepped holes, the prestress beam stepped holes are internally provided with prestress beams, the other ends of the prestress beams upwards penetrate through the prestress beam holes of the lower seat plate, the upper seat plate and the bridge pier, and the tensioning ends of the prestress beams are fixed at the bridge pier tops.
Further, the restorer further comprises a damping device.
Further, the damping device is arranged between the upper seat plate and the lower seat plate.
Further, the damping device is an annular energy dissipation damper, the periphery of the lower seat plate is provided with energy dissipation device lining plates which are symmetrical in center, and the annular energy dissipation damper is connected with the upper seat plate and the energy dissipation device lining plates.
Furthermore, the fixing groove and the swinging protrusion are both in a truncated cone shape.
Further, the number of the rotary ball grooves is 4, and the rotary ball grooves are symmetrically arranged at four corners of the plane boss.
Furthermore, the upper seat board and the lower seat board are also provided with anchor bolt holes for connecting the pier bottom and the bearing platform, so that the upper seat board and the lower seat board are connected with the pier bottom and the bearing platform through anchor bolts.
Furthermore, the prestress beam stepped holes are arranged in a crisscross symmetry 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 normal working conditions, 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 bulges between the upper seat plate and the lower seat plate, and bending moment caused by the horizontal load is borne together through the pre-stress beam and the self weight of the upper structure to prevent the pier from rotating vertically;
2. When an earthquake happens, the bridge pier can take the connecting line of the two spherical crown seat plates as the axis, 2 spherical crown seat plates are rocking surfaces (at least one spherical crown seat plate is used as the rocking surface in any other direction), and the upper seat plate fixing groove is always enveloped with the rocking bulge of the lower seat plate, so that the bridge pier can be reciprocally rocked by 'lifting off' and 'closing' continuously under 'centering' control, the side rigidity of the bridge pier is reduced, and the self-vibration period of a bridge structure is prolonged, thereby playing a role in shock insulation; the damping device is deformed in a reciprocating manner and consumes energy in the swinging process of the bridge pier, so that a damping effect is achieved; after earthquake, the bridge is reset by the tension of the prestressed bundles and the self-resetting capability of the self-weight providing structure of the upper part of the restorer;
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 sways and takes place in the restorer, and pier bottom and cushion cap are the face contact all the time with the restorer, and the atress is comparatively even, can effectively protect the pier main part to avoid the interface to take place to damage.
Drawings
FIG. 1 is a cross-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 of the C-C of FIG. 1 in accordance with the present invention;
FIG. 4 is a cross-sectional view of embodiment 2 of the present invention;
Reference numeral 1, lower bedplate, 101, swing boss, 102, rotation ball groove, 103, prestressing force beam stepped hole, 104, energy consumer welt, 2, spherical crown bedplate, 3, upper bedplate, 301, fixed recess, 302, prestressing force beam hole, 4, prestressing force beam, 5, damping device.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention is made clearly and completely with reference to the accompanying drawings.
Example 1
As shown in the figure, the restorer for supporting pier swing 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 positioned above the lower seat plate 1 and a hemispherical spherical crown seat plate 2, and the upper seat plate 3 and the lower seat plate 1 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 bolts, so that the restorer is convenient to install and replace; the pier sways and happens in the restorer, the pier bottom and the bearing platform are always in surface contact with the restorer, the stress is relatively uniform, and the pier main body can be effectively protected from being damaged at the interface;
The center of the bottom of the upper seat plate 3 is provided with a circular table type fixing groove 301, the middle part of the lower seat plate 1 is a plane boss, the center of the plane boss is provided with a circular table type swinging boss 101, and the swinging boss 101 is correspondingly arranged with the fixing groove 301, but needs a certain swinging clearance fit, so that the swinging reciprocating motion of the restorer is not influenced;
the four corners of the plane boss are respectively provided with a rotary ball groove 102, the spherical crown seat plates 2 are embedded in the rotary ball grooves 102, and the upper surfaces of the embedded spherical crown seat plates 2 are higher than the end surfaces of the plane boss, so that the lower bottom surfaces of the upper seat plates 3 fall on the upper surfaces of the spherical crown seat plates 2; when an earthquake happens, the bridge pier can take the connecting line of the two spherical crown seat plates 2 as an axis in the longitudinal bridge direction or the transverse bridge direction, the two spherical crown seat plates 2 are rocking surfaces (at least one spherical crown seat plate 2 is taken as a rocking surface in any other direction), the upper seat plate 3 fixing groove 301 is always enveloped with the rocking protrusion 101 of the lower seat plate 1, so that the bridge pier can be continuously lifted away and closed under the control of centering to realize reciprocating rocking, the side rigidity of the bridge pier is reduced, and the self-vibration period of a bridge structure is prolonged, thereby playing a role in shock insulation;
The upper seat plate outside the fixing groove 301 is provided with a central symmetrical prestress beam hole 302, the plane boss of the lower seat plate 1 is vertically penetrated with 4 prestress beam stepped holes 103, the prestress beam stepped holes 103 are internally provided with prestress beams 4, the other ends of the prestress beams 4 upwards penetrate through the prestress beam holes of the lower seat plate 1, the upper seat plate 3 and the bridge pier, the stretching ends of the prestress beam 4 are fixed at the bridge pier tops, the prestress beam stepped holes 103 are arranged in a crisscross symmetrical mode, and after an earthquake, the stretching force of the prestress beam 4 and the self-resetting capability of the self-weight providing structure of the upper portion of the restorer enable the bridge to reset.
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 deformed in a reciprocating manner and consumes energy in the swinging process of the bridge pier, so that a damping effect is achieved. The damping device 5 is easy to replace even if damaged after earthquake.
In summary, the bridge swinging vibration reduction and isolation restorer provided by the invention can realize vertical bearing, horizontal limiting and vertical rotation prevention under normal working conditions, realize swinging vibration reduction and isolation protection of a bridge structure under earthquake, and realize self-restoring function after earthquake; meanwhile, the installation and connection are convenient, and the replacement is easy.
Example 2
As shown in fig. 4, the damping device may be an annular energy dissipation damper, and a central symmetrical energy dissipation liner plate 104 may be further disposed around the lower seat plate 1, and the annular energy dissipation damper may be connected with the upper seat plate 3 and the energy dissipation liner plate 104, and the rest is the same as that of embodiment 1.
While the basic principles, principal features and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (7)
1. A reset device for supporting pier swing, which is characterized in that: the device comprises a swinging structure, wherein the swinging structure comprises a lower seat board (1), an upper seat board (3) and a spherical crown seat board (2), the upper seat board (3) is arranged above the lower seat board (1), a fixing groove (301) is formed in the center of the bottom of the upper seat board (3), a plane boss is arranged in the middle of the lower seat board (1), a swinging boss (101) is arranged in the center of the plane boss, and the swinging boss (101) is correspondingly arranged with the fixing groove (301) in clearance fit;
The end faces of the plane bosses are uniformly distributed with a plurality of rotary ball grooves (102), the number of the rotary ball grooves (102) is 4, the rotary ball grooves are symmetrically arranged at four corners of the plane bosses, the spherical crown seat plates (2) are inlaid in the rotary ball grooves (102), and the upper surfaces of the inlaid spherical crown seat plates (2) are higher than the end faces of the plane bosses, so that the lower bottom surfaces of the upper seat plates (3) fall on the upper surfaces of the spherical crown seat plates (2);
The upper seat plate outside the fixing groove (301) is provided with a central symmetrical prestress beam hole (302), the plane boss of the lower seat plate (1) is further vertically penetrated and provided with a plurality of prestress beam stepped holes (103), a prestress beam (4) is arranged in the prestress beam stepped holes (103), the other end of the prestress beam (4) upwards penetrates through the lower seat plate (1), the upper seat plate (3) and the prestress beam holes of the bridge pier, and the tensioning end of the prestress beam is fixed at the bridge pier top.
2. The bridge pier-supporting sway reducer of claim 1, further comprising: the reset device also comprises a damping device (5).
3. A bridge pier-supporting swing-type reset device according to claim 2, wherein: the damping device (5) is arranged between the upper seat board and the lower seat board.
4. A bridge pier-supporting swing-type reset device according to claim 2, wherein: the damping device is an annular energy dissipation damper, a central symmetrical energy dissipation lining plate (104) is arranged around the lower seat plate (1), and the annular energy dissipation damper is connected with the upper seat plate (3) and the energy dissipation lining plate (104).
5. The bridge pier-supporting sway reducer of claim 1, further comprising: the fixing groove (301) and the swing protrusion (101) are both in a truncated cone shape.
6. The bridge pier-supporting sway reducer of claim 1, further comprising: the upper seat board (3) and the lower seat board (1) are also provided with anchor bolt holes for connecting the pier bottom and the bearing platform, so that the upper seat board (3) and the lower seat board (1) are connected with the pier bottom and the bearing platform through anchor bolts.
7. The bridge pier-supporting sway reducer of claim 1, further comprising: the prestress beam stepped holes (103) are arranged in a crisscross 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 CN114481814A (en) | 2022-05-13 |
| CN114481814B true 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 |
|---|---|
| CN114481814A (en) | 2022-05-13 |
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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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