CN102953325B - 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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- CN102953325B CN102953325B CN201110235957.0A CN201110235957A CN102953325B CN 102953325 B CN102953325 B CN 102953325B CN 201110235957 A CN201110235957 A CN 201110235957A CN 102953325 B CN102953325 B CN 102953325B
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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 improving rigid frame bridge shock resistance.
Background technology
Earthquake, as the inevitable natural calamity of one, can cause the loss of lives and properties.Earthquake then can cause larger direct and consequential damage for the destruction of bridge, and therefore for bridge construction, the shock resistance how improving bridge, to reduce the destruction of earthquake to bridge, is a very important problem.
Intensity, ductility and energy dissipation capacity that traditional Bridge Earthquake Resistance Design theory mainly relies on bridge construction, component self to have carry out antidetonation, and the intensity by increase bridge construction, component realizes.It allows larger seismic forces and energy to be delivered to substructure from the superstructure of bridge, and the problem that thus this seismic design will be considered is how for bridge construction provides the ability of resisting this seismic forces.It, by carrying out strength checking according to seismic forces level in the process of bridge design, allows the component occurring plastic strain to carry out Ductility Design to realize to bridge construction simultaneously.
In addition, the utilization extensively adopted at present subtracts seismic isolation technology to strengthen the Bridge Earthquake Resistance Design theory of antivibration capability of bridge is then change the dynamic response characteristics of bridge construction in earthquake by introducing seismic isolation device, to reach the object reducing Seismic input.It is main energy dissipation component with additional seismic isolation device, and is auxiliary with bridge construction component antidetonation.The basic object of the method reduces the seismic forces and energy that are delivered in bridge construction, and its shock resistance is the cycle by extending bridge construction, and the energy dissipation capacity increasing bridge construction realizes.Generally adopt full guard shock design and part protection shock design two kinds of design principless when bridge design.The applicable cases of seismic isolation technology is subtracted from the bridge of various countries, the main method adopted in current bridge seismic isolation design the seismic isolation devices such as rubber support in layers, lead core rubber support or high-damp rubber support is arranged on bridge superstructure and between bridge pier and abutment, to reach the object subtracting shock insulation.
The flexural property of the beam structure of continuous rigid frame bridge is substantially similar to the continuous beam of continuous girder bridge, and wherein continuous rigid frame bridge is with pier consolidation, in across beam body acceptor pier constraint and be different from continuous girder bridge.When the main pier longitudinal direction of continuous rigid frame bridge is more soft, then both have 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 is limited to this across interior, and on adjacent across internal force impact less, if when therefore the end bay of continuous rigid frame bridge is shorter, will be unlikely to occur negative reaction at end bearing place.The no matter main pier of general continuous rigid frame bridge adopts double-walled or single wall pier, owing to reducing the clear distance between girder buttress, therefore cut down the peak value of beam body internal force compared with the continuous beam of continuous girder bridge, thus can reduce deck-molding accordingly, made the structure of bridge more light and handy.In addition, continuous rigid frame bridge eliminates main pier large-tonnage bearing, is conducive to maintenance and the maintenance of bridge.In the construction stage, continuous rigid frame bridge can be avoided 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 that end bay beam-ends pours into.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 distributes by the ratio of rigidity of bridge pier and continuous beam.Then its internal force got is large greatly for the rigidity of bridge pier, now effectively can not play the bending resistance of beam body, and stressed very large at Dun Ding place of continuous beam, do not reach the object reducing pier top hogging moment yet, and its vertical bridge is little to the displacement allowed, and can not eliminate the distortion that additional internal force causes.Simultaneously because the main pier of continuous rigid frame bridge will bear the inertia force of whole superstructure under geological process, the design of its main pier will inevitably be caused often comparatively powerful, 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 how powerful being also difficult to of design of its main pier ensures not destroy in earthquake, thus only also cannot ensure the safe application performance of rigid frame bridge in rarely occurred earthquake by current bridge earthquake resistance means.
As can be seen here, above-mentioned existing rigid frame bridge with in use in structure, obviously still has inconvenience and defect, and is urgently further improved.In order to solve above-mentioned Problems existing, relevant manufactures there's no one who doesn't or isn't seeks solution painstakingly, but have no applicable design for a long time to be completed by development, and common product does not have appropriate structure to solve the problem, this is obviously the anxious problem for solving of relevant dealer always.Therefore how to found a kind of Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance of new structure, one of current important research and development problem of real genus, also becomes the target that current industry pole need be improved.
Because the defect that above-mentioned existing rigid frame bridge exists, the present inventor is based on being engaged in the practical experience and professional knowledge that this type of product design manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, to founding a kind of Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance of new structure, general existing rigid frame bridge can be improved, make it have more practicality.Through constantly research, design, and through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
The object of the invention is to, overcome the defect that existing rigid frame bridge exists, and a kind of Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance of new structure is provided, technical problem to be solved is can rational earthquake energy, thus effectively reduce the geological process that rigid frame bridge main pier bears, and then effectively reduce the engineering quantity on rigid frame bridge substructure and basis, be very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of Frictional Slipping vibration control structure improving rigid frame bridge shock resistance that the present invention proposes, it comprises: the spherical crown being arranged at the reinforced concrete structure of the bottom of the girder of this rigid frame bridge and the described girder of main Dun Gujiechu, with the spherical crown shape notch being arranged at the top of the described main pier of this rigid frame bridge of correspondence, the spherical crown being wherein arranged at described girder bottom is that the spherical crown shape notch at the described main pier top being arranged in correspondence is also by the support of 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, the cylinder of a projection is wherein also provided with at the top of the spherical crown of described girder bottom, the bottom of the spherical crown shape notch at described main pier top is then corresponding is provided with a recessed cylinder groove, the cylinder being wherein arranged at this projection at the spherical crown top of described girder bottom be stretch into corresponding described main pier top spherical crown shape notch bottom this recessed cylinder groove in, and the diameter of this recessed cylinder groove is greater than the cylindrical diameter of this corresponding projection.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance, wherein also presetting round the periphery of this spherical crown and the junction of this corresponding spherical crown shape notch between the described girder and corresponding described main pier of this rigid frame bridge embeddingly has the girder described in being connected excellent with the shearing resistance of corresponding described main pier.
The Frictional Slipping vibration control structure of aforesaid raising rigid frame bridge shock resistance, the spherical crown wherein in described girder bottom is all inlaid with one deck polytetrafluoroethylene (PTFE) slide plate with on this spherical crown at the contact surface place of the spherical crown shape notch at corresponding described main pier top and the surface of 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 on 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 layers of chrome, wherein said polytetrafluoroethylene (PTFE) slide plate is that this of this spherical crown and this spherical crown shape notch surface at spherical crown and the contact surface place of the spherical crown shape notch at corresponding described main pier top being embedded in described girder bottom is coated with on the external surface of the corrosion resistant plate of fine and close layers of chrome.
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.Through as known from the above, in order to achieve the above object, the invention provides a kind of Frictional Slipping vibration control structure improving rigid frame bridge shock resistance, under the bridge normal operating condition that earthquake does not occur, the load on bridge top can be delivered evenly to the substructure of bridge by this vibration control structure.And when earthquake occurs, this structure, by the Frictional Slipping between the spherical crown of girder and the spherical crown shape notch of main pier and rotation, makes its adaptivity behavior strengthen, thus 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 improving rigid frame bridge shock resistance of the present invention at least has following advantages and beneficial effect: the present invention is in the displacement range that can calculate and control, and the adaptive behavior that can be slided 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 in substructure.For the vibrations of many performance objectives or many levels, be thisly self adaptively conducive to the shearing and the moment of flexure that effectively discharge Main Pier of Bridges top.And this structural texture is simple, vertical bearing capacity is large, excellent in durability, and damping Energy Dissipation Mechanism is clear and definite, especially requires that the anti-seismic performance effect of high rigid frame bridge is remarkable to raising anti-seismic performance.
In sum, the invention relates to the Frictional Slipping vibration control structure improving rigid frame bridge shock resistance in a kind of bridge engineering field, this structure is the reinforced concrete structure being arranged at rigid frame bridge girder and main Dun Gujiechu.It is by the spherical crown of the reinforced concrete structure being placed in girder bottom, and the spherical crown shape notch composition being arranged at main pier top of correspondence, and the spherical crown of its middle girder bottom is that the spherical crown shape notch at the main pier top being arranged in correspondence is also by the support of this spherical crown shape notch.Also be provided with the cylinder of a projection at the top of spherical crown, the corresponding bottom at notch is then provided with a recessed cylinder groove simultaneously, and wherein the cylinder of this projection stretches in this recessed cylinder groove.The present invention by said structure in the displacement range that can calculate and control, the adaptive behavior of Surface of Sphere can be utilized to change self rigidity and damping characteristic, with the shockproof requirements adapting to many performance objectives or how levelly to shake, and its structure is simple, vertical bearing capacity is large, good endurance, damping clear mechanism.The present invention has significant progress technically, and has obvious good effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of manual, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram improving the preferred embodiment of the Frictional Slipping vibration control structure of rigid frame bridge shock resistance of the present invention.
1: spherical crown 2: spherical crown shape notch
3: plate fine and close layers of chrome corrosion resistant plate 4: polytetrafluoroethylene (PTFE) slide plate
5: protruding cylinder 6: recessed cylinder groove
7: shearing resistance rod
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to a kind of its detailed description of the invention of Frictional Slipping vibration control structure, structure, feature and the effect thereof improving rigid frame bridge shock resistance proposed according to the present invention, be described in detail as follows.
Aforementioned and other technology contents, Characteristic for the present invention, can know and present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of detailed description of the invention, should to the present invention for the technological means reaching predetermined object and take and effect obtain one more deeply and concrete understanding, but institute's accompanying drawings is only to provide with reference to the use with explanation, is not used for being limited the present invention.
Referring to shown in Fig. 1, is a kind of schematic diagram improving the preferred embodiment of the Frictional Slipping vibration control structure of rigid frame bridge shock resistance of the present invention.A kind of Frictional Slipping vibration control structure improving rigid frame bridge shock resistance of present pre-ferred embodiments, on the basis of rigid frame bridge original beam pier consolidation, by arranging the spherical crown 1 of reinforced concrete structure in the bottom of the girder of rigid frame bridge and this girder of main Dun Gujiechu, and corresponding spherical crown shape notch 2 formation that arranges has the friction hemisphere slide plane structure of adaptive performance and forms at the top of the main pier of this rigid frame bridge.The spherical crown 1 being wherein arranged at girder bottom be arranged in corresponding main pier top spherical crown shape notch 2 and by the support of 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 on 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 layers of chrome, to disperse the load of superstructure more uniformly, make concrete structure can not produce larger stress and concentrate.And the external surface of the corrosion resistant plate 3 being coated with fine and close layers of chrome on spherical crown 1 in girder bottom and this spherical crown 1 at the contact surface place of the spherical crown shape notch 2 at corresponding main pier top and the surface of this spherical crown shape notch 2 is also all inlaid with one deck polytetrafluoroethylene (PTFE) slide plate 4, and form the Frictional Slipping face of Frictional Slipping vibration control structure of the present invention with this polytetrafluoroethylene (PTFE) slide plate 4 on spherical crown shape notch 2 surface, main pier top on the surface by being embedded in girder bottom spherical crown 1.Meanwhile, also preset round the periphery of spherical crown 1 and the junction of corresponding spherical crown shape notch 2 between the girder and corresponding main pier of this rigid frame bridge and embeddingly have the shearing resistance rod 7 being connected girder and corresponding main pier.
Normal operating condition or comparatively smaller tremors time, 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, not sliding in this Frictional Slipping face be made up of polytetrafluoroethylene (PTFE) slide plate 4, serves the effect of rigid frame bridge girder and main pier consolidation.When bridge meets with rarely occurred earthquake generation, the horizontal force between girder and main pier is after the carrying shearing reaching shearing resistance rod 7 defineds, and shearing resistance rod can disconnect automatically at girder and main Dun Jiechumianchu.Frictional Slipping is there is in the spherical crown 1 of girder by the spherical crown shape notch 2 of main pier, the spherical crown 1 of girder is made to increase along the spherical crown shape notch 2 of main pier, horizontal direction earthquake kinetic energy is converted into vertical potential energy, thus reach the object of dissipation seismic energy as much as possible, simultaneously under the effect of girder self gravitation, define again and make the spherical crown 1 of girder move downward the restoring force of reset along the spherical crown shape notch 2 of main pier, make girder have again good Self-resetting performance.
In addition, the cylinder 5 of a projection is also provided with at the top of the spherical crown 1 of girder bottom, corresponding is then provided with a recessed cylinder groove 6 in the bottom of the spherical crown shape notch 2 at main pier top, the cylinder 5 of the projection at spherical crown 1 top of its middle girder bottom be stretch into corresponding main pier top spherical crown shape notch 2 bottom recessed cylinder groove 6 in.And the diameter of this recessed cylinder groove 6 is greater than the diameter of the cylinder 5 of this corresponding projection, thus reach the object of restriction girder level to displacement, produce displacement in the scope that the recessed cylinder groove 6 of the cylinder 5 of the projection at spherical crown 1 top of girder bottom only bottom the spherical crown shape notch 2 at the main pier top of correspondence is limited, and the phenomenon that girder cannot reset can not occur.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that 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 (5)
1. one kind is improved the Frictional Slipping vibration control structure of rigid frame bridge shock resistance, it is characterized in that it comprises: the spherical crown being arranged at the reinforced concrete structure of the bottom of the girder of this rigid frame bridge and the described girder of main Dun Gujiechu, with the spherical crown shape notch being arranged at the top of the described main pier of this rigid frame bridge of correspondence, the spherical crown being wherein arranged at described girder bottom is that the spherical crown shape notch at the described main pier top being arranged in correspondence is also by the support of this spherical crown shape notch;
The cylinder of a projection is also provided with at the top of the spherical crown of described girder bottom, the bottom of the spherical crown shape notch at described main pier top is then corresponding is provided with a recessed cylinder groove, the cylinder being wherein arranged at this projection at the spherical crown top of described girder bottom be stretch into corresponding described main pier top spherical crown shape notch bottom this recessed cylinder groove in, and the diameter of this recessed cylinder groove is greater than the cylindrical diameter of this corresponding projection.
2. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 1, it is characterized in that, also presetting round the periphery of this spherical crown and the junction of this corresponding spherical crown shape notch between the described girder and corresponding described main pier of this rigid frame bridge embeddingly has the girder described in being connected excellent with the shearing resistance of corresponding described main pier.
3. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 1 and 2, it is characterized in that, the spherical crown in described girder bottom is all inlaid with one deck polytetrafluoroethylene (PTFE) slide plate with on this spherical crown at the contact surface place of the spherical crown shape notch at corresponding described main pier top and the surface of this spherical crown shape notch.
4. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 3, it is characterized in that, on the surface of the spherical crown of described girder bottom and on 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 layers of chrome, wherein said polytetrafluoroethylene (PTFE) slide plate is that this of this spherical crown and this spherical crown shape notch surface at spherical crown and the contact surface place of the spherical crown shape notch at corresponding described main pier top being embedded in described girder bottom is coated with on the external surface of the corrosion resistant plate of fine and close layers of chrome.
5. the Frictional Slipping vibration control structure of raising rigid frame bridge shock resistance according to claim 4, 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 true CN102953325B (en) | 2015-01-28 |
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| CN103362147B (en) * | 2013-06-20 | 2016-04-27 | 上海师范大学 | The multidirectional Self-resetting isolation structure of a kind of building |
| 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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| JP2777919B2 (en) * | 1989-10-26 | 1998-07-23 | オイレス工業株式会社 | Bridge girder support method |
| CN100557135C (en) * | 2006-09-20 | 2009-11-04 | 中铁工程设计咨询集团有限公司 | Railway bridge double spherical surface shock absorption and separation mount |
| CN201212128Y (en) * | 2008-06-18 | 2009-03-25 | 衡水橡胶股份有限公司 | Antivibration support abutment for energy self-releasing bridge |
| CN201265142Y (en) * | 2008-09-23 | 2009-07-01 | 衡水中铁建工程橡胶有限责任公司 | City light rail ball type bearing |
| KR20100062560A (en) * | 2008-12-02 | 2010-06-10 | 강용우 | Supporting device for bridge |
| CN201485785U (en) * | 2009-08-12 | 2010-05-26 | 衡水丰泽工程橡胶科技开发有限公司 | Spherical steel bearing of elastic-plastic anti-falling beam |
| KR101032740B1 (en) * | 2010-10-05 | 2011-05-06 | 에프알앤디건설(주) | Bridge bearing |
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