CN102953325A - Frictional slip seismic structure for improving seismic capacity of rigid frame bridges - Google Patents
Frictional slip seismic structure for improving seismic capacity of rigid frame bridges Download PDFInfo
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- CN102953325A CN102953325A CN2011102359570A CN201110235957A CN102953325A CN 102953325 A CN102953325 A CN 102953325A CN 2011102359570 A CN2011102359570 A CN 2011102359570A CN 201110235957 A CN201110235957 A CN 201110235957A CN 102953325 A CN102953325 A CN 102953325A
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Abstract
The invention relates to a frictional slip seismic structure for improving seismic capacity of rigid frame bridges. The frictional slip seismic structure is reinforced concrete structure disposed at a girder-pier joint of a rigid frame structure and comprises a reinforced concrete structure spherical crown at the bottom of a girder and a spherical-crown cavity at the top of a pier. The spherical crown at the bottom of the girder is located in the spherical-crown cavity at the top of the pier and is supported by the spherical-crown cavity. In addition, a protruding cylinder is disposed at the top of the spherical crown, a recessed cylindrical cavity is correspondingly arranged at the bottom of the spherical-crown cavity, and the protruding cylinder extends into the recessed cylindrical cavity. The frictional slip seismic structure changes self-rigidity and self-damping to adapt to the requirement for resisting multifunctional target or multilevel earthquakes by adapting of spherical surfaces within a calculable and controllable displacement range. The frictional slip seismic structure is simple in structure, high in vertical bearing capacity, highly durable and clear in damping mechanism.
Description
Technical field
The present invention relates to a kind of vibration control structure of rigid frame bridge, particularly relate to a kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance.
Background technology
Earthquake can cause the loss of lives and properties as a kind of inevitable natural calamity.Earthquake then can cause larger direct and consequential damage for the destruction of bridge, therefore for bridge construction, how to improve the shock resistance of bridge to reduce earthquake to the destruction of bridge, is a very important problem.
Traditional Bridge Earthquake Resistance Design theory mainly is that the intensity, ductility and the energy dissipation capacity that rely on bridge construction, member self to have come antidetonation, can realize by the intensity that increases bridge construction, member.It allows larger seismic forces and energy to be delivered to substructure from the superstructure of bridge, thereby the problem that will consider of this seismic design is the ability how this seismic forces of opposing is provided for bridge construction.It can be by carrying out strength checking according to the seismic forces level in the process of bridge design, the member that simultaneously bridge construction is allowed to occur plastic strain carries out Ductility Design to be realized.
In addition, it then is to change the dynamic response characteristics of bridge construction in earthquake by introducing seismic isolation device that the utilization of adopting at present extensively subtracts the Bridge Earthquake Resistance Design theory that seismic isolation technology strengthens antivibration capability of bridge, to reach the purpose that reduces the earthquake input.It is take the seismic isolation device that adds as main energy dissipation member, and take bridge construction member antidetonation as auxiliary.The basic purpose of the method is to reduce seismic forces and the energy that is delivered on the bridge construction, and its shock resistance is the cycle by the prolongation bridge construction, and the energy dissipation capacity that increases bridge construction is realized.Generally be to adopt the design of full guard shock insulation and part to protect two kinds of design principless of shock insulation design when bridge design.Subtract the applicable cases of seismic isolation technology from the bridge of various countries, the main method that adopts in the bridge seismic isolation design at present is that the seismic isolation devices such as rubber support in layers, lead core rubber support or high-damp rubber support are installed between bridge superstructure and bridge pier and the abutment, to reach the purpose that subtracts shock insulation.
The flexural property of the beam structure of continuous rigid frame bridge is basically similar to the continuous beam of continuous girder bridge, and wherein continuous rigid frame bridge is with the pier beam consolidation, in stride beam body acceptor pier constraint and be different from continuous girder bridge.When the main pier of continuous rigid frame bridge vertically softened, then both had similar structure behavior.When the rigidity of pier of continuous rigid frame bridge is larger, the internal force big city that the multispan load of continuous rigid frame bridge produces be limited to originally stride in, and less on adjacent internal force impact of striding, if therefore the end bay of continuous rigid frame bridge is more in short-term, will be unlikely to negative reaction to occur at the end bearing place.No matter main pier is to adopt double-walled or single wall pier to general continuous rigid frame bridge, owing to reduced the clear distance between the girder buttress, therefore compare the peak value of having subdued beam body internal force with the continuous beam of continuous girder bridge, thereby can reduce accordingly deck-molding, make the structure of bridge more light and handy.In addition, continuous rigid frame bridge has saved main pier large-tonnage bearing, is conducive to maintenance and the maintenance of bridge.In the construction stage, continuous rigid frame bridge can avoid arranging temporary support, makes the steadiness of construction better, and can adopt the free cantilever casting of uneven length, to reduce or to avoid the support of end bay beam-ends perfusion.In the ordinary course of things, the superiority of continuous rigid frame bridge is apparent.But the bridge pier of continuous rigid frame bridge and its continuous beam will bear internal force jointly, and the internal force of structure is recently to distribute by the rigidity of bridge pier and continuous beam.The rigidity of bridge pier is large, and then its internal force of getting is large, can not effectively bring into play the bending resistance of beam body this moment, and stressed very large at Dun Ding place of continuous beam, also not reach the purpose of reduction pier top hogging moment, and its vertical bridge is little to the displacement that allows, and can not eliminate the distortion that additional internal force causes.Because the main pier of continuous rigid frame bridge will bear the inertia force of whole superstructure under geological process, will inevitably cause the design of its main pier often comparatively powerful simultaneously, the quantity of its main pedestal pile foundation also has larger increase simultaneously.But this rigid frame bridge, when meeting with rare geological process of meeting, no matter the design of its main pier is how powerful also is difficult to guarantee in earthquake not failure, thereby only depends on present bridge earthquake resistance means also can't guarantee the safe application performance of rigid frame bridge in rarely occurred earthquake.
This shows that above-mentioned existing rigid frame bridge obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, finished by development but have no for a long time applicable design always, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious wish of relevant dealer solves.Therefore how to found a kind of Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing rigid frame bridge exists, the inventor is based on being engaged in for many years abundant practical experience and professional knowledge of this type of product design manufacturing, and the utilization of cooperation scientific principle, positive research and innovation in addition, Frictional Slipping vibration control structure in the hope of the raising rigid frame bridge shock resistance of founding a kind of new structure, can improve general existing rigid frame bridge, make it have more practicality.Through constantly research, design, and through after repeatedly studying sample and improvement, finally create the present invention who has practical value.
Summary of the invention
The object of the invention is to, overcome the defective that existing rigid frame bridge exists, and provide a kind of Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance of new structure, technical problem to be solved is rational earthquake energy, thereby effectively reduce the geological process that rigid frame bridge master pier bears, and then effectively reduce rigid frame bridge substructure and basic engineering quantity, be very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance according to the present invention's proposition, it comprises: the spherical crown of reinforced concrete structure of bottom that is arranged at the described girder at the girder of this rigid frame bridge and the fixed place of main pier, with the spherical crown shape notch at the top of the described main pier that is arranged at this rigid frame bridge of correspondence, the spherical crown that wherein is arranged at described girder bottom is the support that is arranged in the spherical crown shape notch at corresponding described main pier top and is subjected to this spherical crown shape notch.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance, wherein also be provided with the cylinder of a projection at the top of the spherical crown of described girder bottom, the corresponding recessed cylinder groove that is provided with then in the bottom of the spherical crown shape notch at described main pier top, this the protruding cylinder that wherein is arranged at the spherical crown top of described girder bottom be stretch into corresponding described main pier top spherical crown shape notch bottom should recessed cylinder groove in, and the diameter of cylinder groove that should be recessed is greater than the cylindrical diameter of this projection of correspondence.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance wherein has round the periphery of this spherical crown and the junction of corresponding this spherical crown shape notch is also default embedding that to be connected described girder excellent with the shearing resistance of corresponding described main pier between the described girder of this rigid frame bridge and corresponding described main pier.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance wherein all is inlaid with one deck polytetrafluoroethylene (PTFE) slide plate on the surface of this spherical crown at the spherical crown of described girder bottom and the contact surface place of the spherical crown shape notch at corresponding described main pier top and this spherical crown shape notch.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance, wherein on the surface of the spherical crown of described girder bottom and the surface of the spherical crown shape notch at described main pier top be provided with the corrosion resistant plate that one deck is coated with fine and close chromium layer, to be the spherical crown that is embedded in described girder bottom be coated with on the external surface of corrosion resistant plate of fine and close chromium layer with this of this spherical crown at the contact surface place of the spherical crown shape notch at corresponding described main pier top and this spherical crown shape notch surface wherein said polytetrafluoroethylene (PTFE) slide plate.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance, the radius of curvature of the spherical crown of wherein said girder bottom is identical with the radius of curvature of the spherical crown shape notch at described main pier top.
The present invention compared with prior art has obvious advantage and beneficial effect.Via as can be known above, in order to achieve the above object, the invention provides a kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance, do not occuring under the bridge normal operating condition of earthquake, this vibration control structure can be with the load Transmit evenly on the bridge top substructure to bridge.And when earthquake occured, this was constructed by Frictional Slipping and rotation between the spherical crown shape notch of the spherical crown of girder and main pier, its adaptivity behavior is strengthened, thereby play good damping effect, and then reduce earthquake to the impact of rigid frame bridge.
By technique scheme, a kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance of the present invention has following advantages and beneficial effect at least: the present invention is in the displacement range that can calculate and control, and the adaptive behavior that can slide in the spherical crown shape notch at main pier top by the spherical crown of girder bottom is automatically adjusted bridge superstructure and is delivered to inertia force on the substructure.For the vibrations of many performance objectives or many levels, this self adaptive shearing and the moment of flexure that is conducive to effectively discharge the Main Pier of Bridges top.And this structural texture is simple, and vertical bearing capacity is large, excellent in durability, and the damping Energy Dissipation Mechanism is clear and definite, and is especially remarkable to the anti-seismic performance effect that improves the demanding rigid frame bridge of anti-seismic performance.
In sum, the invention relates to the Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance in a kind of bridge engineering field, this structure is the reinforced concrete structure that is arranged at rigid frame bridge girder and the fixed place of main pier.It is the spherical crown by the reinforced concrete structure that places the girder bottom, and the corresponding spherical crown shape notch composition that is arranged at main pier top, and the spherical crown of its middle girder bottom is the support that is arranged in the spherical crown shape notch at corresponding main pier top and is subjected to this spherical crown shape notch.Also be provided with simultaneously the cylinder of a projection at the top of spherical crown, the corresponding bottom at notch then is provided with a recessed cylinder groove, and cylinder that wherein should projection is to stretch in this recessed cylinder groove.The present invention by said structure in the displacement range that can calculate and control, can utilize rigidity and the damping characteristic of the adaptive behavior change self of Surface of Sphere, to adapt to many performance objectives or many levelly shockproof requirementss of vibrations, and it is simple in structure, vertical bearing capacity is large, good endurance, damping mechanism is clear and definite.The present invention has significant progress technically, and has obvious good effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of manual, and for above and other purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Fig. 1 is the schematic diagram of the preferred embodiment of a kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance of the present invention.
1: spherical crown 2: spherical crown shape notch
3: plate fine and close chromium layer corrosion resistant plate 4: the polytetrafluoroethylene (PTFE) slide plate
5: the cylinder 6 of projection: recessed cylinder groove
7: the shearing resistance rod
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, a kind of its specific embodiment of Frictional Slipping vibration control structure, structure, feature and effect thereof that improves the rigid frame bridge shock resistance to foundation the present invention proposes is described in detail as follows.
Relevant aforementioned and other technology contents of the present invention, Characteristic can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation by the specific embodiment, should be to reach technological means and the effect that predetermined purpose takes to obtain one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, the present invention is limited.
Seeing also shown in Figure 1ly, is the schematic diagram of the preferred embodiment of a kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance of the present invention.A kind of Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance of preferred embodiment of the present invention, on the fixed basis of the original beam pier of rigid frame bridge, by the bottom at this girder at the girder of rigid frame bridge and the fixed place of main pier the spherical crown 1 of reinforced concrete structure is set, and the corresponding spherical crown shape notch 2 that arranges forms and has the friction hemisphere slide plane structure of adaptive performance and consist of at the top of the main pier of this rigid frame bridge.The spherical crown 1 that wherein is arranged at the girder bottom is the support that is arranged in the spherical crown shape notch 2 at corresponding main pier top and is subjected to this spherical crown shape notch 2, and the radius of curvature of the spherical crown 1 of girder bottom is identical with the radius of curvature of the spherical crown shape notch 2 at main pier top.On the surface of the spherical crown 1 of girder bottom and the surface of the spherical crown shape notch 2 at main pier top be provided with the corrosion resistant plate 3 that one deck is coated with fine and close chromium layer, to disperse more uniformly the load of superstructure, make concrete structure can not produce larger stress and concentrate.And on the external surface of the corrosion resistant plate that is coated with fine and close chromium layer 3 on the surface of this spherical crown 1 at the spherical crown 1 of girder bottom and the contact surface place of the spherical crown shape notch 2 at corresponding main pier top and this spherical crown shape notch 2, also all be inlaid with one deck polytetrafluoroethylene (PTFE) slide plate 4, and by the Frictional Slipping face that is embedded in upper and main pier top spherical crown shape notch 2 lip-deep these polytetrafluoroethylene (PTFE) slide plates 4 in girder bottom spherical crown 1 surface and consists of Frictional Slipping vibration control structure of the present invention.Simultaneously, between the girder of this rigid frame bridge and corresponding main pier, round the periphery of spherical crown 1 and the junction of corresponding spherical crown shape notch 2 is also default embedding the shearing resistance rod 7 that is connected girder and corresponding main pier arranged.
During at normal operating condition or than smaller tremors, the horizontal movement of the girder under the effect of shearing resistance rod 7 and frictional force of this rigid frame bridge with Frictional Slipping vibration control structure of the present invention is less, this Frictional Slipping face that is made of polytetrafluoroethylene (PTFE) slide plate 4 does not slide, and has played the fixed effect of rigid frame bridge girder and main pier.When bridge met with the rarely occurred earthquake generation, the horizontal force between girder and main pier was behind the carrying shearing that reaches shearing resistance rod 7 defineds, and the shearing resistance rod can automatic disconnection at girder and main Dun Jiechumianchu.The spherical crown 1 of girder will be in the spherical crown shape notch 2 interior generation Frictional Slipping of main pier, make the spherical crown 1 of girder along spherical crown shape notch 2 risings of main pier, with level to earthquake kinetic energy be converted into vertical potential energy, thereby reach the purpose of dissipation seismic energy as much as possible, simultaneously under the effect of girder self gravitation, formed again the spherical crown 1 that makes girder and moved downward the restoring force that resets along the spherical crown shape notch 2 of main pier, so that girder has again good Self-resetting performance.
In addition, also be provided with the cylinder 5 of a projection at the top of the spherical crown 1 of girder bottom, the bottom of corresponding spherical crown shape notch 2 at main pier top then is provided with a recessed cylinder groove 6, and the cylinder 5 of the projection at spherical crown 1 top of its middle girder bottom is to stretch in the recessed cylinder groove 6 of spherical crown shape notch 2 bottoms at corresponding main pier top.And the diameter of cylinder groove 6 that should be recessed is greater than the diameter of this protruding cylinder 5 of correspondence, thereby reach restriction girder level to the purpose of displacement, make the cylinder 5 of projection at spherical crown 1 top of girder bottom only in recessed cylinder groove 6 restricted portions of spherical crown shape notch 2 bottoms at the main pier top of correspondence, produce displacement, and the phenomenon that girder can't reset can not occur.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (6)
1. Frictional Slipping vibration control structure that improves the rigid frame bridge shock resistance, it is characterized in that it comprises: the spherical crown of reinforced concrete structure of bottom that is arranged at the described girder at the girder of this rigid frame bridge and the fixed place of main pier, with the spherical crown shape notch at the top of the described main pier that is arranged at this rigid frame bridge of correspondence, the spherical crown that wherein is arranged at described girder bottom is the support that is arranged in the spherical crown shape notch at corresponding described main pier top and is subjected to this spherical crown shape notch.
2. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 1, it is characterized in that, also be provided with the cylinder of a projection at the top of the spherical crown of described girder bottom, the corresponding recessed cylinder groove that is provided with then in the bottom of the spherical crown shape notch at described main pier top, this the protruding cylinder that wherein is arranged at the spherical crown top of described girder bottom be stretch into corresponding described main pier top spherical crown shape notch bottom should recessed cylinder groove in, and the diameter of cylinder groove that should be recessed is greater than the cylindrical diameter of this projection of correspondence.
3. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 1, it is characterized in that between the described girder of this rigid frame bridge and corresponding described main pier, having round the periphery of this spherical crown and the junction of corresponding this spherical crown shape notch is also default embedding that to be connected described girder excellent with the shearing resistance of corresponding described main pier.
4. the Frictional Slipping vibration control structure of the described raising rigid frame bridge of arbitrary claim shock resistance in 3 according to claim 1, it is characterized in that, on the surface of this spherical crown at the spherical crown of described girder bottom and the contact surface place of the spherical crown shape notch at corresponding described main pier top and this spherical crown shape notch, all be inlaid with one deck polytetrafluoroethylene (PTFE) slide plate.
5. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 4, it is characterized in that, on the surface of the spherical crown of described girder bottom and the surface of the spherical crown shape notch at described main pier top be provided with the corrosion resistant plate that one deck is coated with fine and close chromium layer, to be the spherical crown that is embedded in described girder bottom be coated with on the external surface of corrosion resistant plate of fine and close chromium layer with this of this spherical crown at the contact surface place of the spherical crown shape notch at corresponding described main pier top and this spherical crown shape notch surface wherein said polytetrafluoroethylene (PTFE) slide plate.
6. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 5 is characterized in that, the radius of curvature of the spherical crown of described girder bottom is identical with the radius of curvature of the spherical crown shape notch at described main pier top.
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| CN201110235957.0A CN102953325B (en) | 2011-08-17 | 2011-08-17 | Frictional slip seismic structure for improving seismic capacity of rigid frame bridges |
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| CN201110235957.0A CN102953325B (en) | 2011-08-17 | 2011-08-17 | Frictional slip seismic structure for improving seismic capacity of rigid frame bridges |
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| CN102953325B CN102953325B (en) | 2015-01-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362147A (en) * | 2013-06-20 | 2013-10-23 | 上海师范大学 | Building multi-directional self-resetting seismic isolation structure |
| CN105020645A (en) * | 2014-04-28 | 2015-11-04 | 姜长海 | Application of low-post ball-based clockwise steering reflecting light to street lamp |
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| KR101032740B1 (en) * | 2010-10-05 | 2011-05-06 | 에프알앤디건설(주) | Bridge bearing |
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| CN105020645A (en) * | 2014-04-28 | 2015-11-04 | 姜长海 | Application of low-post ball-based clockwise steering reflecting light to street lamp |
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| CN102953325B (en) | 2015-01-28 |
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