CN103243644B - Variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing - Google Patents
Variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing Download PDFInfo
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- CN103243644B CN103243644B CN201310220186.7A CN201310220186A CN103243644B CN 103243644 B CN103243644 B CN 103243644B CN 201310220186 A CN201310220186 A CN 201310220186A CN 103243644 B CN103243644 B CN 103243644B
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Abstract
The invention relates to a variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing. A seismic absorption period of a friction pendulum bearing adopted in the field of bridge construction is determined once the spherical radius is determined, but the fixed period results in poorer adaptive capacity of a structure. The variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing is provided with a bispherical lining plate, wherein an upper bearing plate and a base are arranged at the upper part and the lower part of the bispherical lining plate; slide block components are arranged on the lower surface of the bispherical lining plate; a limitation plate fixed on the base and guide bar components are arranged at the periphery of the upper bearing plate; and two curved surface friction pairs are formed among the upper bearing plate, the bispherical lining plate and a variable-curvature bottom plate. According to the variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing, resonance of the traditional friction pendulum bearing is overcome by adopting a variable-curvature surface; reliable contact between relational structures of the bearing with different curvature radiuses, and the friction surface contact adaptivity are achieved by the slide block components; local stress concentration is avoided; seismic mitigation and absorption function separation on the normal working condition and the earthquake working condition is achieved; the stress is stable and reliable; beam falling is avoided; and multistage protective seismic mitigation and absorption effects are obvious.
Description
Technical field
the invention belongs to bridge and subtract technical field of isolation, be specifically related to a kind of variable curvature adaptive friction pendulum-type vibration absorption and isolation support.
Background technology
In recent years, along with taking place frequently of global earthquakes, how engineering structures realizes the great attention that quake evaluation obtains people.In bridge engineering field, for overcoming the deficiency of traditional structure anti-seismic technology, shock insulation, damping control technology are the effective ways improving structural seismic performance.At present, vibration absorption and isolation support is adopted both at home and abroad mostly extending structure natural vibration period, to dissipate and be input to the seismic energy of superstructure, and achieve good economic and social benefit.In " Seismic Design of Highway Bridges detailed rules and regulations " (JTG/T B02-01-2008) that Department of Transportation issues, the monolithic devices seismic isolation device of recommendation has: lead core rubber support, high-damp rubber support, friction pendulum vibration absorption and isolation support.Wherein friction pendulum vibration absorption and isolation support is owing to having hyposensitivity to seismic stimulation frequency range, high life and high stability, stronger from spacing and reset capability and the combination property such as excellent shock insulation and energy dissipating mechanism, becomes the vibration absorption and isolation support that most is promising gradually.And the traditional friction pendulum vibration absorption and isolation support of current domestic employing, once spherical radius is determined, its shock insulation cycle is also determined thereupon, and at nearly tomography often with long period impulse type seismic wave, easy and structure resonates; On the other hand, although in some patent document, the covibration utilizing variable curvature mode to bring to eliminate Long-period Seismic is proposed, but on different radius of curvature slide planes, sliding friction pair is partial points contact, easily produces larger stress and concentrates, and has a strong impact on bearing application life.
Summary of the invention
The object of this invention is to provide a kind of variable curvature adaptive friction pendulum-type vibration absorption and isolation support, the covibration that variable curvature elimination Long-period Seismic brings can be utilized, slide block assembly can be utilized again to realize holocyclic self adaptation reliable contacts and self-resetting capability, restrainer simultaneously, and multistage protection damping and isolation effect is provided.
The technical solution adopted in the present invention is:
Variable curvature adaptive friction pendulum-type vibration absorption and isolation support, is characterized in that:
Described bearing settlement has two sphere liner plate, the upper sphere top of two sphere liner plate be provided with its on the upper bracket plate that adapts of spherical shape, the lower peripheral surface bottom of two sphere liner plate is provided with the base adapted with its lower peripheral surface shape;
Be provided with corrosion resistant plate between the lower peripheral surface of two sphere liner plate and base, the top of this corrosion resistant plate is provided with some slide block assemblies, and some slide block assemblies are embedded in the densely covered groove of two sphere liner plate lower peripheral surface;
Upper bracket plate ring week is provided with the limiting plate be fixed on base.
The upper sphere of described two sphere liner plates is provided with corrosion resistant plate, and be provided with slide plate between upper bracket plate and this corrosion resistant plate, slide plate ring week is provided with sealing ring.
The spherical curve of described base can be iso-curvature circular curve, hyperbolicity curve, elliptic curve or other variable curvature curves, and sphere circumferencial direction arranges round ring boss.
Described limiting plate is divided into four parts, between two relatively, is all fixed on the round ring boss of base edge by shear studs, and edge shape and the round ring boss edge of limiting plate adapt;
Shear studs is connected by chain or wire rope screw assembly with limiting plate, and limiting plate is connected by chain or wire rope screw assembly with base;
Upper bracket plate is connected with base by upper anchoring assembly and lower anchoring assembly by wire rope.
Described slide block assembly is followed successively by columniform deformation block, the slide block assembly steel plate of cydariform and slide block assembly slide plate from top to bottom;
Wherein, deformation block bottom part ring week and slide block assembly slide plate ring week be provided with slide block assembly sealing ring.
The slide block assembly ball impression liner plate that described slide block assembly is followed successively by columniform deformation block from top to bottom, bottom surface is concave spherical surface, curved slide block assembly slide plate, the slide block assembly liner plate of hemisphere shape and the slide block assembly slide plate of base plane shape;
Wherein, the slide block assembly slide plate of curved slide block assembly slide plate and base plane shape is provided with slide block assembly sealing ring.
Four limits that described limiting plate is relative with upper bracket plate are provided with gib block assembly;
Gib block assembly comprises guiding corrosion resistant plate, gib block, connection pin and guide pad;
Wherein, guide pad is fixed on limiting plate by some connection pins, and the face that guide pad is relative with limiting plate is arc-shaped surface, and another slidingsurface is provided with gib block; Guiding corrosion resistant plate is arranged on the side of upper bracket plate;
End, guide pad two ends is provided with chain or wire rope screw assembly, is connected on limiting plate.
Leave the gap meeting unidirectional design displacement between two pieces of limiting plates relative on described upper bracket plate and one of them direction, and be provided with gib block assembly between two pieces of limiting plates relative on other direction;
Gib block assembly comprises guiding corrosion resistant plate, gib block, connection pin and guide pad;
Wherein, guide pad is fixed on limiting plate by connecting pin, and the face that guide pad is relative with limiting plate is circular arc, and another slidingsurface is provided with gib block, and guiding corrosion resistant plate is arranged on the side of upper bracket plate.
The gap meeting design displacement is all left between two groups of limiting plates relative in described upper bracket plate and both direction.
The gap being less than 1mm is provided with between described upper bracket plate and all limiting plates of ring.
The present invention has the following advantages:
The present invention adopts surfaces varying in curvature both to overcome the resonance problem of conventional friction pendulum bearing, greatly weakens again the beam body lifting problem under conventional displacement; Adopt slide block assembly to improve rubbing surface contact adaptivity, realize the reliable contacts at different curvature radius undersetting dependency structure, avoid the problem that stress raisers occur; The shear studs arranged can realize nominal situation and subtract shock insulation function under earthquake operating mode and be separated, slip can be separated with rotation by gib block assembly, and chain or wire rope screw assembly are set part caducous during earthquake is connected, prevent the seismic secondary disaster produced because of bearing, overall structure is made a distinction between the important and the lesser one, the coordinating and unifying, load path is clear, stability under loading is reliable, restrainer, and the damping and isolation effect of multistage protection is obvious.
Accompanying drawing explanation
Fig. 1 is structural representation fixed (front view) of the present invention;
Fig. 2 is structural representation fixed (top view) of the present invention;
Fig. 3 is benzvalene form slide block assembly structural representation of the present invention;
Fig. 4 is combined sliding block modular construction schematic diagram of the present invention;
Fig. 5 is gib block modular construction schematic diagram of the present invention;
Fig. 6 is gib block modular construction chain of the present invention or wire rope screw assembly figure;
Fig. 7 is embodiments of the invention 2 one-way slide type (front view);
Fig. 8 is embodiments of the invention 2 one-way slide type (top view);
Fig. 9 is embodiments of the invention 3 bi-directional sliding-type (front view);
Figure 10 is embodiments of the invention 3 bi-directional sliding-type (top view);
Figure 11 is embodiments of the invention 4 iso-curvature friction pendulum support (front view);
Figure 12 is embodiments of the invention 4 iso-curvature friction pendulum support (plan view);
In figure, the upper anchoring assembly of 1-, 2-wire rope, 3-upper bracket plate, the two sphere liner plate of 4-, 5-slide block assembly, 6-base, anchoring assembly under 7-, 8-slide plate, 9-gib block assembly, 10-limiting plate, 11-chain or wire rope screw assembly, 12-shear studs, 13-sealing ring, 14-corrosion resistant plate, 15-deformation block, 16-slide block assembly steel plate, 17-slide block assembly sealing ring, 18-slide block assembly slide plate, 19-slide block assembly ball impression liner plate, 20-slide block assembly liner plate, 21-leads corrosion resistant plate, 22-gib block, and 23-connects pin, 24-guide pad.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
Variable curvature adaptive friction pendulum-type vibration absorption and isolation support of the present invention, be provided with two sphere liner plate 4, the upper sphere top of two sphere liner plate 4 be provided with its on the upper bracket plate 3 that adapts of spherical shape, the lower peripheral surface bottom of two sphere liner plate 4 is provided with the base 6 adapted with its lower peripheral surface shape.The sphere of base 6 increases progressively to edge from center, and center curvature is comparatively large, and edge's curvature is less.Upper bracket plate 3 ring week is provided with the limiting plate 10 be fixed on base 6, and limiting plate 10 is divided into four parts, and between two relatively, be all fixed on the round ring boss at base 6 edge by shear studs 12, edge shape and the round ring boss of limiting plate 10 adapt.
The upper sphere of two sphere liner plate 4 is provided with corrosion resistant plate 14, is provided with slide plate 8 between upper bracket plate and this corrosion resistant plate 14, slide plate 8 ring week is provided with sealing ring 13.Be provided with corrosion resistant plate 14 between the lower peripheral surface of two sphere liner plate 4 and base 6, the top of this corrosion resistant plate 14 is provided with some slide block assemblies 5, and slide block assembly 5 is embedded in the densely covered groove of two sphere liner plate 4 lower peripheral surface.
Slide block assembly 5 has two kinds of form of structure:
(1) see the tub configurations form of Fig. 3, slide block assembly 5 is followed successively by columniform deformation block 15, the slide block assembly steel plate 16 of cydariform and slide block assembly slide plate 18 from top to bottom; Wherein, deformation block 15 bottom part ring week and slide block assembly slide plate 18 ring week be provided with slide block assembly sealing ring 17.
(2) see the combined support form of Fig. 4, the slide block assembly ball impression liner plate 19 that slide block assembly 5 is followed successively by columniform deformation block 15 from top to bottom, bottom surface is concave spherical surface, curved slide block assembly slide plate 18, the slide block assembly liner plate 17 of hemisphere shape and the slide block assembly slide plate 18 of base plane shape; Wherein, the slide block assembly slide plate 18 of curved slide block assembly slide plate 18 and base plane shape is provided with slide block assembly sealing ring 17.
The deformable material of deformation block 15 has rotation and compression performance, butterfly spring, rubber, macromolecular material, nylon material etc. can be adopted, realized adaptivity contact and the Self-resetting function of different curvature radius undersetting rubbing surface by the compressive strain of material or rotation, avoid stress raisers problem.
During earthquake, shear studs 12 will be caused limiting plate 10 and guide pad 24 to come off by cutting off, in order to avoid the secondary disaster therefore brought, shear studs 12 is connected with limiting plate 10 chain or wire rope screw assembly 11, and limiting plate 10 is connected with base 6 chain or wire rope screw assembly 11; For the bearing having gib block assembly 9, the chain that guide pad 24 and limiting plate 10 are arranged by end, guide pad 24 two ends or wire rope screw assembly 11 are connected.
Meanwhile, in order to restrainer occurs, by connecting steel wire ropes 2 between upper anchoring assembly 1 and lower anchoring assembly 7, upper bracket plate 3 is connected with base 6.
In summary, sliding friction pair is defined by corrosion resistant plate 14, slide plate 8 and sealing ring 13 between upper bracket plate 3 and two sphere liner plate 4, variable curvature friction pair is defined by corrosion resistant plate 14 and slide block assembly slide plate 18 between two sphere liner plate 4 and base 6, when this two suites face friction pair works to realize bearing function individually or simultaneously, effectively ensure that smooth slip and the rotation of bearing, efficiently avoid the resonance problem of traditional bearing, reliable connection is arranged, and effectively can prevent secondary disaster and the Luo Liang of earthquake.
According to the gap form between upper bracket plate 3 and limiting plate 10, bearing of the present invention has three kinds of form of structure:
(1) see the fixed structure of Fig. 1 and Fig. 2, between upper bracket plate 3 and all limiting plates 10 of ring, be provided with gib block assembly 9, between upper bracket plate 3 and all limiting plates 10 of ring, be provided with the gap being less than 1mm.See Fig. 5, gib block assembly 9 comprises guiding corrosion resistant plate 21, gib block 22 and is connected pin 23 and guide pad 24.Wherein, guide pad 24 is fixed on limiting plate 10 by connecting pin 23, and the face that guide pad is relative with limiting plate is circular arc, and another slidingsurface is provided with gib block, and guiding corrosion resistant plate 21 is arranged in the sidewall of upper bracket plate 3.In normal conditions, limiting plate 10 limits base 6 and moves, the arc end of guide pad 24 adapts to the corner of bearing, gib block 22 and corrosion resistant plate 21 can meet the requirement that bearing vertically slides to material property and function, and when meeting earthquake, shear studs 12 is cut off dissipation seismic energy, and realize variable curvature damping and isolation effect, reach the multistage protection damping and isolation effect of friction pendulum support, in extreme displacement situation, the boss of base surrounding plays anti-fall beam action.
(2) see the one-way slide type structure of Fig. 7 and Fig. 8, leave the gap meeting unidirectional design displacement between two pieces of limiting plates 10 relative on upper bracket plate 3 and one of them direction, and be provided with gib block assembly 9 between two pieces of limiting plates 10 relative on other direction.This form of structure is applicable to direction across bridge or the vertical bridge situation to design displacement.Under nominal situation, limiting plate 10 limits the monodisplacement of variable curvature support plate 6, slides along guidance set in another direction, and meets the corner requirement of bearing; When meeting earthquake, shear studs 12 is cut off power consumption seismic energy, and realizes variable curvature damping effect, reaches the multistage protection damping and isolation effect of friction pendulum support, and in extreme displacement situation, the boss of base surrounding plays anti-fall beam action.
(3) see the bi-directional sliding-type structure of Fig. 9 and Figure 10, the gap meeting design displacement is all left between two groups of limiting plates 10 relative in upper bracket plate 3 and both direction, be applicable to the situation of bi-directional design displacement, specific works situation is identical with one-way slide type variable curvature adaptive friction pendulum-type vibration absorption and isolation support.
(4) see the iso-curvature friction pendulum fixed structure of Figure 11 and Figure 12, the spherical radius of base 6 is constant, the two sphere liner plate 4 lower peripheral surface radiuses adapted with it are identical with base, between two sphere liner plate 4 and base 6, corrosion resistant plate 14 is only set, structure shown in all the other structure with Fig. 1 with Fig. 2 is identical, corresponding by regulating the distance between upper bracket plate 3 and limiting plate 10 can develop into one-way slide type and bi-directional sliding-type structure.
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading manual of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.
Claims (5)
1. variable curvature adaptive friction pendulum-type vibration absorption and isolation support, is characterized in that:
Described bearing settlement has two sphere liner plate (4), the upper sphere top of two sphere liner plate (4) be provided with its on the upper bracket plate (3) that adapts of spherical shape, the lower peripheral surface bottom of two sphere liner plate (4) is provided with the base (6) adapted with its lower peripheral surface shape;
Corrosion resistant plate (14) is provided with between the lower peripheral surface of two sphere liner plate (4) and base (6), the top of this corrosion resistant plate (14) is provided with some slide block assemblies (5), and some slide block assemblies (5) are embedded in the densely covered groove of two sphere liner plate (4) lower peripheral surface;
Be provided with the limiting plate (10) be fixed on base (6) upper bracket plate (3) ring week;
The upper sphere of described two sphere liner plates (4) is provided with corrosion resistant plate (14), and be provided with slide plate (8) between upper bracket plate and this corrosion resistant plate (14), slide plate (8) ring week is provided with sealing ring (13);
The spherical curve of described base (6) is iso-curvature circular curve, hyperbolicity curve or elliptic curve, and sphere circumferencial direction arranges round ring boss;
Described limiting plate (10) is divided into four parts, and between two relatively, be all fixed on the round ring boss at base (6) edge by shear studs (12), edge shape and the round ring boss edge of limiting plate (10) adapt;
Shear studs (12) is connected by chain or wire rope screw assembly (11) with limiting plate (10), and limiting plate (10) is connected by chain or wire rope screw assembly (11) with base (6);
Upper bracket plate (3) is connected with base (6) by upper anchoring assembly (1) and lower anchoring assembly (7) by wire rope (2);
The slide block assembly liner plate (20) of the described slide block assembly ball impression liner plate (19) that slide block assembly (5) is followed successively by columniform deformation block (15) from top to bottom, bottom surface is concave spherical surface, curved slide block assembly slide plate, hemisphere shape and the slide block assembly slide plate of base plane shape;
Wherein, the slide block assembly slide plate of curved slide block assembly slide plate and base plane shape is provided with slide block assembly sealing ring (17).
2. variable curvature adaptive friction pendulum-type vibration absorption and isolation support according to claim 1, is characterized in that:
Four limits that described limiting plate (10) is relative with upper bracket plate (3) are provided with gib block assembly (9);
Gib block assembly (9) comprises guiding corrosion resistant plate (21), gib block (22), connects pin (23) and guide pad (24);
Wherein, guide pad (24) is fixed on limiting plate (10) by some connection pins (23), and the face that guide pad (24) is relative with limiting plate (10) is arc-shaped surface, and another slidingsurface is provided with gib block (22); Guiding corrosion resistant plate (21) is arranged on the side of upper bracket plate (3);
Guide pad (24) end, two ends is provided with chain or wire rope screw assembly (11), is connected on limiting plate (10).
3. variable curvature adaptive friction pendulum-type vibration absorption and isolation support according to claim 1, is characterized in that:
Leave the gap meeting unidirectional design displacement between two pieces of limiting plates (10) relative on described upper bracket plate (3) and one of them direction, and be provided with gib block assembly (9) between two pieces of limiting plates (10) relative on other direction;
Gib block assembly (9) comprises guiding corrosion resistant plate (21), gib block (22), connects pin (23) and guide pad (24);
Wherein, guide pad (24) is fixed on limiting plate (10) by connecting pin (23), the face that guide pad (24) is relative with limiting plate (10) is circular arc, and another slidingsurface is provided with gib block (22), and guiding corrosion resistant plate (21) is arranged on the side of upper bracket plate (3).
4. variable curvature adaptive friction pendulum-type vibration absorption and isolation support according to claim 1, is characterized in that:
The gap meeting design displacement is all left between two groups of limiting plates (10) relative in described upper bracket plate (3) and both direction.
5. variable curvature adaptive friction pendulum-type vibration absorption and isolation support according to claim 2, is characterized in that:
The gap being less than 1mm is provided with between described upper bracket plate (3) and ring week limiting plate (10).
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| CN201310220186.7A CN103243644B (en) | 2013-06-05 | 2013-06-05 | Variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing |
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| CN201310220186.7A CN103243644B (en) | 2013-06-05 | 2013-06-05 | Variable-curvature self-adaptive friction pendulum seismic mitigation and absorption bearing |
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| CN103243644B true CN103243644B (en) | 2015-06-17 |
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| CN112324000B (en) * | 2020-09-16 | 2022-10-21 | 中国铁路设计集团有限公司 | Shock absorption and energy dissipation method under earthquake action |
| CN113897857A (en) * | 2021-10-15 | 2022-01-07 | 中铁第四勘察设计院集团有限公司 | Friction pendulum support and bridge structure |
| CN114718981B (en) * | 2022-03-22 | 2023-07-21 | 广州大学 | Eddy current damping three-dimensional damping device utilizing bridge weight block |
| CN114775415B (en) * | 2022-05-23 | 2022-11-29 | 四川双建路桥机械有限责任公司 | Self-adaptive support |
| CN114875725A (en) * | 2022-06-01 | 2022-08-09 | 中南大学 | End thorn energy consumption device for earthquake risk transfer of railway track-bridge system |
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Inventor after: Shi Chunjuan Inventor after: Sun Honglan Inventor after: Pan Changping Inventor after: Ge Shengjin Inventor after: Wang Wei Inventor after: Peng Zeyou Inventor after: Zhao Zhenyu Inventor after: Wang Yongxiang Inventor after: Wang Jianqiang Inventor after: Liu Le Inventor before: Ge Shengjin Inventor before: Sun Honglan Inventor before: Wang Wei Inventor before: Pan Changping Inventor before: Peng Zeyou Inventor before: Zhao Zhenyu Inventor before: Shi Chunjuan Inventor before: Wang Yongxiang Inventor before: Wang Jianqiang Inventor before: Liu Le |
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