CN113308986A - Trigger type displacement locking friction pendulum support - Google Patents
Trigger type displacement locking friction pendulum support Download PDFInfo
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- CN113308986A CN113308986A CN202110646080.8A CN202110646080A CN113308986A CN 113308986 A CN113308986 A CN 113308986A CN 202110646080 A CN202110646080 A CN 202110646080A CN 113308986 A CN113308986 A CN 113308986A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 230000001960 triggered effect Effects 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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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
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
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Abstract
The invention relates to a trigger type displacement locking friction pendulum support which comprises an upper ball panel, a double-spherical-surface sliding block, a lower ball panel, a plane sliding plate, a limiting steel ring and a shear pin unit, wherein the upper ball panel is connected with the lower ball panel through a sliding block; an upper spherical friction pair is formed between the upper spherical panel and the double-spherical slide block, a lower spherical friction pair is formed between the double-spherical slide block and the lower spherical plate, and a plane friction pair is formed between the lower spherical plate and the plane sliding plate; the upper spherical panel, the double-spherical slide block and the lower spherical plate jointly form a friction pendulum unit, and a positioning module matched with the lower end of the shear pin unit is arranged on the plane sliding plate; the shear pin unit is sheared under the action of an earthquake, so that the shear pin unit falls down until the shear pin unit is limited in the positioning module. Compared with the prior art, the friction pendulum unit has the advantages that the support slides in a plane under the normal use condition, the shear resistant pin is sheared under the earthquake, the plane friction pair is triggered to be locked, the friction pendulum unit works, the structure is simple, the force transmission is reliable, the maintenance and the maintenance after the earthquake are convenient, and the friction pendulum unit is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a trigger type displacement locking friction pendulum support.
Background
The friction pendulum support has the advantages of high vertical bearing capacity, obvious energy consumption effect, strong self-resetting capability, suitability for large displacement, large corner and the like, and is widely applied to seismic mitigation and isolation design of highway bridges, railway bridges and urban rail transit bridges. In a bridge, in consideration of bridge maintenance and driving comfort, the use of expansion joints is often reduced in bridge design to improve bearing capacity and driving comfort and reduce bridge maintenance cost, so that the bridge is made into an ultralong continuous bridge; for large-span arch bridges, cable-stayed bridges and suspension bridges, the span of the structure per se is large. Under the temperature effect, the beam body has large telescopic displacement, if a conventional friction pendulum support is adopted, the beam body at the support is greatly vertically lifted, the head of a bridge is caused to jump and even the train is derailed, and the application of the friction pendulum support is challenged.
The existing industry standard JT/T852-plus 2013 for the friction swing type seismic isolation and reduction support for the road bridge provides a friction swing support with three sliding surfaces, only a plane sliding surface slides under the normal use condition, the plane sliding surface and a spherical sliding surface work together under the earthquake, although the overlarge vertical lifting of the support under the temperature action is relieved, a section of idle stroke occurs in the support structure, particularly in a long-connection large-span bridge, the longitudinal idle stroke of the support is large, and the expected seismic isolation and reduction effect cannot be achieved.
In addition, in order to realize the smooth conversion from plane sliding to simple pendulum motion of the earthquake lower support, a combination system of a speed locking device and a friction pendulum support is proposed, but the conventional fluid type speed locking device has large size and is difficult to be attached to the support; mechanical speed locking devices are complex in construction and have long term reliability challenges.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a trigger type displacement locking friction pendulum support which is suitable for a long-span bridge, simple in structure, reliable in force transmission, good in damping effect and convenient for maintenance after an earthquake.
The purpose of the invention can be realized by the following technical scheme:
the technical scheme aims at providing a trigger type displacement locking friction pendulum support which comprises an upper ball panel, a double-spherical-surface sliding block, a lower ball panel, a plane sliding plate, a limiting steel ring and a shear pin unit;
an upper spherical friction pair is formed between the upper spherical panel and the double-spherical sliding block, a lower spherical friction pair is formed between the double-spherical sliding block and the lower spherical plate, and a plane friction pair is formed between the lower spherical plate and the plane sliding plate;
the upper spherical panel, the double-spherical sliding block and the lower spherical plate jointly form a friction pendulum unit, the limiting steel ring is fixed on the lower spherical panel through a shear pin unit, and the inner side of the limiting steel ring limits the ring side of the double-spherical sliding block, so that the horizontal displacement among the upper spherical panel, the double-spherical sliding block and the lower spherical plate is limited;
the plane sliding plate is provided with a positioning module matched with the lower end of the shear pin unit, the shear pin unit is sheared under the action of an earthquake, the shear pin unit falls down until the shear pin unit is limited in the positioning module, and the friction pendulum unit is changed into simple pendulum motion from plane sliding.
Furthermore, mounting holes are formed in the lower ball panel in an array mode, and the shear pin units are installed on the mounting holes.
Furthermore, a cover plate mounting groove is formed above the mounting hole.
Furthermore, the shear pin unit comprises a shear pin, a shear pin cover plate, a nut and a gasket;
the upper end of the shear pin is provided with a thread;
the shear pin cover plate is arranged in the cover plate mounting groove;
the lower end of the shear pin is limited in the mounting hole, the upper end of the shear pin penetrates through the shear pin cover plate and the limiting steel ring in sequence, and limiting is achieved through a nut and a gasket on the upper surface of the limiting steel ring.
Further, the shear pin unit further comprises a spring, the shear pin comprises a rod body and a cylinder, the diameter of the cylinder is larger than that of the rod body, the spring is sleeved on the rod body in a penetrating mode, one end of the spring is abutted to the end portion of the cylinder, and the other end of the spring is abutted to the lower surface of the shear pin cover plate.
Furthermore, shear pin holes and bolt holes are formed in the shear pin cover plate in an array mode, the shear pin holes are matched with the rod body of the shear pin, and the bolt holes are used for fastening and limiting the shear pin cover plate on the lower spherical plate.
Furthermore, the middle part of the rod body of the shear pin is provided with an annular V-shaped groove, and the annular V-shaped groove is positioned at the junction of the limiting steel ring and the lower spherical plate.
Furthermore, the positioning module comprises a transverse limiting groove arranged on the plane sliding plate and a longitudinal limiting hole arranged in the transverse limiting groove, and the longitudinal limiting hole can be in clearance fit with the cylinder of the shear pin.
In one embodiment of the present invention, two sides of the planar sliding plate are provided with a limit baffle, and a side wall surface of the limit baffle and a side wall surface of the lower ball panel form a side friction pair, so that the lower ball panel and the planar sliding plate form a one-way horizontal sliding.
As another embodiment of the present technical solution, two sides of the planar sliding plate are provided with a limiting baffle, and a certain movable gap is formed between a side wall surface of the limiting baffle and a side wall surface of the lower ball panel, so that the lower ball panel and the planar sliding plate form a bidirectional horizontal sliding.
Compared with the prior art, the invention has the following technical advantages: can be through setting up anti shear pin unit, realized that the support slides for the plane under the normal use condition, anti shear pin cuts off under the earthquake, triggers the vice lock of plane friction and dies, and friction pendulum unit work, this technical scheme simple structure simultaneously, biography power is reliable, and maintenance easy maintenance after the shake is fit for promoting and applying.
Drawings
FIG. 1 is a cross-sectional view of a unidirectional movable support or a fixed support in the fixing direction in the present technical solution;
FIG. 2 is a cross-sectional view of the bi-directional cradle in the transverse direction of the present invention;
FIG. 3 is an isometric view of a planar slide plate according to the present disclosure;
FIG. 4 is an isometric view of the shear pin resisting unit of the present embodiment;
FIG. 5 is an isometric view of an anti-shear pin cover plate according to the present teachings;
fig. 6 is an axonometric view of the limiting steel ring in the technical scheme.
Reference numbers in the figures: the structure comprises a plane sliding plate 1, a plane friction pair 2, a lower spherical panel 3, a lower spherical friction pair 4, a double-spherical sliding block 5, an upper spherical friction pair 6, an upper spherical panel 7, a limiting baffle 8, a shear pin 9, a nut 10, a gasket 11, a limiting steel ring 12, a spring 13, an annular V-shaped groove 14, a transverse limiting groove 15, a longitudinal limiting hole 16, a shear pin cover plate 17, a shear pin hole 18, a bolt hole 19 and a side friction pair 20.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the triggered displacement locking friction pendulum support in the present embodiment includes an upper ball panel 7, a double-ball surface slider 5, a lower ball panel 3, a planar sliding plate 1, a limiting steel ring 12 and a shear pin unit.
An upper spherical friction pair 6 is formed between the upper spherical plate 7 and the double-spherical slide block 5, a lower spherical friction pair 4 is formed between the double-spherical slide block 5 and the lower spherical plate 3, and a plane friction pair 2 is formed between the lower spherical plate 3 and the plane sliding plate 1. The upper spherical plate 7, the double-spherical sliding block 5 and the lower spherical plate 3 jointly form a friction pendulum unit, the limiting steel ring 12 is fixed on the lower spherical plate 3 through a shear pin unit, and the inner side of the limiting steel ring 12 is limited to the ring side of the double-spherical sliding block 5, so that the horizontal displacement among the upper spherical plate 7, the double-spherical sliding block 5 and the lower spherical plate 3 is limited. The plane sliding plate 1 is provided with a positioning module matched with the lower end of the shear pin unit, the shear pin unit is sheared under the action of an earthquake, the shear pin unit falls down until the shear pin unit is limited in the positioning module, and the friction pendulum unit is changed into simple pendulum motion from plane sliding.
Mounting holes are formed in the lower spherical plate 3 in an array mode, and the shear pin units are arranged on the mounting holes. And a cover plate mounting groove is formed above the mounting hole.
In specific implementation, the shear pin unit comprises a shear pin 9, a shear pin cover plate 17, a nut 10 and a gasket 11. The upper end of the shear pin 9 is provided with threads, the shear pin cover plate 17 is arranged in the cover plate mounting groove, the lower end of the shear pin 9 is limited in the mounting hole, the upper end of the shear pin 9 sequentially penetrates through the shear pin cover plate 17 and the limiting steel ring 12, see fig. 6, and the limiting is realized through the nut 10 and the gasket 11 on the upper surface of the limiting steel ring 12. The shear pin unit further comprises a spring 13, the shear pin 9 comprises a rod body and a column body, the diameter of the column body is larger than that of the rod body, the spring 13 is sleeved on the rod body in a penetrating mode, one end of the spring 13 is abutted to the end portion of the column body, and the other end of the spring 13 is abutted to the lower surface of the shear pin cover plate 17. Shear pin holes 18 and bolt holes 19 are formed in the shear pin cover plate 17 in an array manner, referring to fig. 5, the shear pin holes 18 are matched with the rod body of the shear pin 9, and the bolt holes 19 are used for fastening and limiting the shear pin cover plate 17 on the lower ball panel 3. An annular V-shaped groove 14 is formed in the middle of the rod body of the shear pin 9, and referring to fig. 4, the annular V-shaped groove 14 is located at the junction of the limiting steel ring 12 and the lower spherical plate 3, so that accurate control of a shear fracture point is realized.
In specific implementation, the positioning module includes a transverse limiting groove 15 opened on the planar sliding plate 1 and a longitudinal limiting hole 16 arranged in the transverse limiting groove 15, referring to fig. 3, where the longitudinal limiting hole 16 can be in clearance fit with the cylinder of the shear pin 9.
In specific implementation, two sides of the planar sliding plate 1 are provided with limit baffles 8, and side wall surfaces of the limit baffles 8 and side wall surfaces of the lower spherical plate 3 form a side surface friction pair, so that the lower spherical plate 3 and the planar sliding plate 1 form one-way horizontal sliding.
In specific implementation, the limiting steel ring 12 is fixed on the lower spherical panel through the shear pin unit to limit the horizontal displacement of the friction pendulum unit under the normal use condition. The plane sliding plate 1 is provided with a transverse limiting groove 15 and a longitudinal limiting hole 16. In the technical scheme, the shear pin unit comprises a shear pin 9, a shear pin cover plate 17, a spring 13, a nut 10 and a gasket 11.
In specific implementation, the shear pin 9 is a cylinder with a small diameter at the upper half section and a large diameter at the lower half section, an annular V-shaped groove 14 is arranged in the middle, a thread is arranged at the top end, and a spring 13 is sleeved outside the upper half section. The width of the transverse limiting groove 15 is equal to the diameter of the longitudinal limiting hole 16 and is slightly larger than the diameter of the lower half section of the shear pin 9. The diameter of the longitudinal limiting hole 16 is slightly larger than that of the lower half section of the shear pin 9, and the distance between the longitudinal limiting holes 16 can be adjusted according to requirements. The upper half section of the shear pin 9 is a cylindrical rod body, and the lower half section of the shear pin can be a cylinder or a prism. The shear pins 9 are uniformly distributed on two sides of the support along the longitudinal direction of the bridge, and the diameter and the number of the shear pins can be selected according to the requirement of the shear force of the support.
In specific implementation, for the upper spherical friction pair and the lower spherical friction pair, the friction coefficient and the curvature radius can be designed according to requirements.
When the plane sliding plate and the shear pin unit are specifically implemented, the plane sliding plate and the shear pin unit are characterized by being arranged below the double-spherical sliding block, also being arranged above the double-spherical sliding block, and being matched with the upper spherical plate 7 and the lower spherical plate 3.
When the anti-shear pin works, the nut is screwed down under the normal use condition, the spring is compressed, the lower section of the whole anti-shear pin is arranged in the lower spherical panel, the annular V-shaped groove is positioned at the junction of the limiting steel ring and the lower spherical panel, the planar friction pair bears the support displacement caused by temperature action, concrete shrinkage and creep and the like, and the friction pendulum unit bears the rotational deformation of the support. Under the earthquake, the shearing force of the fixed direction of the one-way movable support or the transverse bridge direction of the two-way movable support reaches the shearing force of the shearing resistant pin, the upper half section of the shearing resistant pin is sheared, the lower half section falls into the transverse limiting groove of the plane sliding plate under the action of the spring and the dead weight, and then slides into the longitudinal limiting hole along with the longitudinal displacement, so that the sliding of the plane friction pair is limited, and the friction pendulum unit starts to work to bear the deformation of the earthquake lower support. In maintenance and repair after earthquake, the lower half section of the shear pin is taken out by opening the shear pin cover plate, and the shear pin is replaced again to push the beam body to the original position.
Example 2
Different from embodiment 1, in this embodiment, the two sides of the planar sliding plate 1 are provided with the limiting baffles 8, and a certain movable gap is formed between the side wall surfaces of the limiting baffles 8 and the side wall surfaces of the lower spherical plate 3, as shown in fig. 2, so that the lower spherical plate 3 and the planar sliding plate 1 form a bidirectional horizontal sliding motion.
Comparative example 1
In the prior art, CN203270446U discloses a friction pendulum seismic isolation support, which has the same effect as a common support in normal times, namely, the upper load of a bridge is uniformly transmitted to a lower structure, and the support can meet the deformation requirements of the upper structure caused by shrinkage creep, temperature change and the like. The horizontal plane friction between upper bracket board and the middle sliding block is vice, has then realized the separation of temperature variation displacement and earthquake displacement, avoids traditional friction pendulum support to cause the inside great inferior internal force that produces of structure because the temperature variation displacement makes the roof beam body lifting to reduce the harm to bridge structures, increase of service life. Compared with the technical scheme, the technical scheme has the defect that the spherical friction pair only plays a role in the fixed direction of the plane friction pair, a section of idle stroke exists in the moving direction of the plane friction pair, and particularly in a long-connection long-span bridge, the longitudinal idle stroke of the support is large, so that the seismic reduction and isolation effect of the support is influenced.
Comparative example 2
CN212956112U discloses conversion formula friction pendulum subtracts, isolation bearing relates to bridge technical field, and this utility model discloses an upper bracket board, concave surface welt, the double sphere body and the lower hem including from the top down sets gradually, plane sliding connection between upper bracket board and the concave surface welt all through sphere sliding connection between the sphere on concave surface welt and the double sphere body and between double sphere body lower sphere and the lower hem, concave surface welt below cover is equipped with the shear ring, and the shear ring passes through the shear pin and connects on the lower hem, and the shear ring top left and right sides all is provided with the check plate that is used for restricting upper bracket board and concave surface welt relative slip that is connected through spring control mechanism. The defect of the technical scheme is that when the displacement of the support under the action of shrinkage creep and temperature is large, the size of the stop plate is overlarge, so that the support is difficult to mount and cannot be normally bounced in an earthquake, and the support cannot be suitable for a long-span bridge.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A trigger type displacement locking friction pendulum support is characterized by comprising an upper ball panel (7), a double-spherical-surface sliding block (5), a lower ball panel (3), a plane sliding plate (1), a limiting steel ring (12) and a shear pin unit;
an upper spherical friction pair (6) is formed between the upper spherical panel (7) and the double-spherical sliding block (5), a lower spherical friction pair (4) is formed between the double-spherical sliding block (5) and the lower spherical panel (3), and a plane friction pair (2) is formed between the lower spherical panel (3) and the plane sliding plate (1);
the upper spherical panel (7), the double-spherical-surface sliding block (5) and the lower spherical panel (3) jointly form a friction pendulum unit, the limiting steel ring (12) is fixed on the lower spherical panel (3) through a shear pin unit, and the inner side of the limiting steel ring (12) limits the ring side of the double-spherical-surface sliding block (5) so as to limit the horizontal displacement among the upper spherical panel (7), the double-spherical-surface sliding block (5) and the lower spherical panel (3);
the plane sliding plate (1) is provided with a positioning module matched with the lower end of the shear pin unit, the shear pin unit is sheared under the action of an earthquake, the shear pin unit falls down until the shear pin unit is limited in the positioning module, and the friction pendulum unit is changed into simple pendulum motion from plane sliding.
2. The triggered displacement-locked friction pendulum support according to claim 1, wherein the lower ball panel (3) has mounting holes formed therein in an array manner, and the shear pin units are mounted on the mounting holes.
3. The triggered displacement locking friction pendulum support according to claim 2, wherein a cover plate mounting groove is formed above the mounting hole.
4. The triggered displacement-locked friction pendulum support according to claim 3, characterized in that said shear pin unit comprises a shear pin (9), a shear pin cover plate (17), a nut (10), a washer (11);
the upper end of the shear pin (9) is provided with a thread;
the shear pin cover plate (17) is arranged in the cover plate mounting groove;
the lower end of the shear pin (9) is limited in the mounting hole, the upper end of the shear pin (9) penetrates through the shear pin cover plate (17) and the limiting steel ring (12) in sequence, and the upper end of the shear pin is fixedly mounted through a nut (10) and a gasket (11) on the upper surface of the limiting steel ring (12).
5. The triggered displacement-locked friction pendulum support according to claim 4, characterized in that the shear pin unit further comprises a spring (13), the shear pin (9) comprises a rod and a cylinder, the cylinder has a larger diameter than the rod, the spring (13) is threaded on the rod, such that one end of the spring (13) abuts against the end of the cylinder, and the other end of the spring (13) abuts against the lower surface of the shear pin cover plate (17).
6. The triggered displacement-locked friction pendulum support according to claim 4, characterized in that the shear pin cover plate (17) is provided with shear pin holes (18) and bolt holes (19) in an array, the shear pin holes (18) are matched with the rod body of the shear pin (9), and the bolt holes (19) are used for fastening and limiting the shear pin cover plate (17) on the lower ball panel (3).
7. The triggered displacement-locked friction pendulum support according to claim 5, characterized in that the middle of the rod body of the shear pin (9) is provided with an annular V-shaped groove (14), and the annular V-shaped groove (14) is located at the intersection of the limiting steel ring (12) and the lower ball panel (3).
8. The triggered displacement-locked friction pendulum support according to claim 5, wherein the positioning module comprises a transverse limiting groove (15) formed on the planar sliding plate (1) and a longitudinal limiting hole (16) formed in the transverse limiting groove (15), and the longitudinal limiting hole (16) can be in clearance fit with the cylinder of the shear pin (9).
9. The triggered type displacement locking friction pendulum support according to claim 1, characterized in that, the two sides of the plane sliding plate (1) are provided with limit baffles (8), the side wall surfaces of the limit baffles (8) and the side wall surfaces of the lower ball panel (3) form side friction pairs, so that the lower ball panel (3) and the plane sliding plate (1) form one-way horizontal sliding.
10. The triggered type displacement locking friction pendulum support according to claim 1, characterized in that the planar sliding plate (1) is provided with a limit baffle (8) on both sides, and a certain clearance is formed between the side wall surface of the limit baffle (8) and the side wall surface of the lower ball panel (3), so that the lower ball panel (3) and the planar sliding plate (1) can slide horizontally in two directions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110646080.8A CN113308986B (en) | 2021-06-10 | 2021-06-10 | Trigger type displacement locking friction pendulum support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110646080.8A CN113308986B (en) | 2021-06-10 | 2021-06-10 | Trigger type displacement locking friction pendulum support |
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| CN113308986A true CN113308986A (en) | 2021-08-27 |
| CN113308986B CN113308986B (en) | 2024-05-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113981805A (en) * | 2021-11-08 | 2022-01-28 | 中铁二院工程集团有限责任公司 | Bridge end track slab transverse deformation resisting structure under earthquake action |
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2021
- 2021-06-10 CN CN202110646080.8A patent/CN113308986B/en active Active
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| CN113981805A (en) * | 2021-11-08 | 2022-01-28 | 中铁二院工程集团有限责任公司 | Bridge end track slab transverse deformation resisting structure under earthquake action |
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| CN113308986B (en) | 2024-05-31 |
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