CN103806372A - Segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers - Google Patents
Segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers Download PDFInfo
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- CN103806372A CN103806372A CN201410060837.5A CN201410060837A CN103806372A CN 103806372 A CN103806372 A CN 103806372A CN 201410060837 A CN201410060837 A CN 201410060837A CN 103806372 A CN103806372 A CN 103806372A
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Abstract
The invention discloses a segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers. The segment high pier bridge seismic reduction and isolation structure comprises a bearing platform, a lower pier body, an upper pier body and a beam body which are sequentially stacked from bottom to top; the segment high pier bridge seismic reduction and isolation structure further comprises the first inhaul cable support and the second inhaul cable support, the first inhaul cable support is arranged on the top surface of the upper pier body, the beam body is stacked on the top surface of the upper pier body through the first inhaul cable support, the second inhaul cable support is arranged on a butt joint surface of the lower pier body and the upper pier body, and the upper pier body is stacked on the lower pier body through the second inhaul cable support. The segment high pier bridge seismic reduction and isolation structure achieves the purposes of enhancing seismic reduction and limiting capability of a bridge system and meanwhile improving adaptability and diversity of seismic reduction and isolation technique used for high pier bridges, greatly reduces or even avoids seismic damage, is suitable for railway bridges, highway bridges and urban viaducts, and particularly has excellent seismic resistance for segment constructed high piers especially in high-intensity regions.
Description
Technical field
The present invention relates to the technical field of bridge structure design, relate in particular to the high pier bridge of a kind of sections that adopts bilayer that drag-line bearing is set seismic isolation and reduction structure.
Background technology
Along with the quick construction of Southwestern China, In Northwest Mountainous highway and railway and the development of urban viaduct, increasing high pier bridge is used widely in these areas, and pier height is also more and more higher.Particularly Mountainous Highway Construction, due to a varied topography, high slope, mountain is steep, a lot of bridges have to cross over river valley and zanjon, these bridges have simply supported girder bridge or 2～7 that many employings do not wait across footpath 20～50m across one continuous girder bridge, or Long Span Continuous Rigid-Frame Structure, its bridge pier height is conventionally up to tens of rice rice even up to a hundred.Along with the quickening of high-grade highway construction, the application of high pier also can get more and more later.The seismic design of high pier bridge is the difficult problem that domestic and international project circle is paid close attention to always, conventionally adopts tensility shock-resistant method as preferred option, and after shake, easily repair subtract shock insulation scheme to the more difficult application of high pier bridge.
Section assembling construction technology is always for bridge superstructure, the nearly more than ten years are just suitably for lower bridge pier structure, the U.S. is used this construction method to build a large amount of bridges non-seismic region, and multiple engineering practices such as China's Donghai Bridge, Construction of Hangzhou Bay Cross-sea Bridge and port Zhuhai and Macao bridge have all adopted section assembling bridge pier.As everyone knows, the structural performance research of section assembling structure under high strength geological process or under near-field earthquake is not yet ripe, even in American-European countries, the extensive application of this superior structural form also only limits to non-region or the low region of providing fortification against earthquakes of providing fortification against earthquakes, and therefore needs to carry out the high pier structure of section assembling and the combined earthquake-resistant performance study of seismic isolation device.
Domestic and international shortage high pier stands the experience of high-intensity earthquake at present, and high pier bridge belongs to Irregular Bridges, and its seismic design has exceeded the scope of application of China existing " Seismic Design of Highway Bridges detailed rules and regulations " (JTG/T B02-01-2008).For guaranteeing the safety of lifeline engineering, reduce the economic loss that the rear secondary disaster of shake causes, for avoiding the high pier of high-intensity earthquake that the destruction that cannot repair occurs, bridge worker must pay attention to the seismic design of high pier.
Therefore, the applicant is devoted to develop the high pier bridge of a kind of sections that adopts bilayer that drag-line bearing is set seismic isolation and reduction structure always, reach the damping and the spacing ability that strengthen bridge system, improve high pier bridge employing simultaneously and subtract compliance and the multifarious goal of the invention of seismic isolation technology, thereby alleviate widely the generation of even avoiding earthquake.
Summary of the invention
Because the above-mentioned deficiency of prior art, the present invention proposes a kind of damping and spacing ability that can strengthen bridge system, improve high pier bridge simultaneously and adopt the compliance and the diversity that subtract seismic isolation technology, alleviate or avoid the employing bilayer of earthquake generation that the high pier bridge of the sections seismic isolation and reduction structure of drag-line bearing is set.
For achieving the above object, the invention provides the high pier bridge of a kind of sections that adopts bilayer that drag-line bearing is set seismic isolation and reduction structure, comprise from down to up stacked successively cushion cap, bottom pier shaft, top pier shaft and beam body, also comprise the first drag-line bearing and the second drag-line bearing, described the first drag-line bearing is arranged on the end face of described top pier shaft, described beam body is stacked on the end face of described top pier shaft by described the first drag-line bearing, described the second drag-line bearing is arranged on the interface of described bottom pier shaft and described top pier shaft, described top pier shaft is stacked on the pier shaft of described bottom by described the second drag-line bearing.
Preferably, described bottom pier shaft is vertically assembled by 2-4 steel concrete sections piece.
Preferably, described top pier shaft is 1 steel concrete sections piece.
Preferably, the 0.3-0.5 that the height of described top pier shaft equals described bottom pier shaft height doubly.
Preferably, the quantity of described the first drag-line bearing is 2-4.
Preferably, the quantity of described the second drag-line bearing is 2-4.
The present invention is in conjunction with the sections feature of the high pier structure of section assembling, high tradition pier is divided into top pier shaft and two parts of bottom pier shaft, when the end face of described top pier shaft arranges described the first drag-line bearing, on the interface of top pier shaft and bottom pier shaft, be also provided with described the second drag-line bearing, this structure can significantly improve the rigidity of high pier all directions under dead load, in the time that earthquake occurs, realize and subtract function of shock insulation, thereby high pier is converted to seismic isolation design by Ductility Design, greatly reduces high pier bridge to basic demand; The setting of the second middle drag-line bearing has good adaptivity for assembled bridge pier of stage, has greatly improved the development space of assembled high pier bridge of stage in high earthquake region; In addition, the high pier bridge of the sections of this form seismic isolation and reduction structure is realized its predetermined antidetonation target by the power consumption of drag-line bearing, and under normal operating condition and in small earthquakes situation, structure meets instructions for use, does not substantially damage; In macroseism situation, absorb energy by the friction texturizing of the first drag-line bearing and the second drag-line bearing, and after shake, can keep in repair easily reset to recover its supporting capacity.
The beneficial effect that adopts the double-deck high pier bridge of the sections seismic isolation and reduction structure that drag-line bearing is set to have of the present invention is as follows:
1) owing to having adopted bilayer that the thought of damping device (the first drag-line bearing and the second drag-line bearing) is set, double-layer shock-absorbing can be seen as to a vibration absorption unit, there is before function of shock insulation occurs all directions bending rigidity compared with the high pier of conventionally design so large, greatly improved the compliance of high pier bridge employing seismic isolation technology.
2) there is good economy.The ability designing requirement of the pier footing of the employing of this technology reduces greatly, compared with Ductility Design or add the high pier of the pure section assembling of axial prestress muscle construction, convenient maintenance after shake.
3) can be combined with flexibly the design and construction feature of the high pier of section assembling, utilize the intrinsic seam in bridge pier top can facilitate this double-layer shock-absorbing technology of design and construction.
4) application seismic isolation design method has been carried out the seismic design of high pier in macroseism situation; preset the damping limiting component of structure; protect main member pier shaft; significantly improve the shock resistance of high pier; embody the conceptual design in seismic design, can be good at the anti-seismic problem of the high pier bridge in mountain area that solves highly seismic region.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is that specific embodiment adopts the double-deck elevation that the high pier bridge of the sections seismic isolation and reduction structure of drag-line bearing is set.
Fig. 2 is that specific embodiment adopts the double-deck side view that the high pier bridge of the sections seismic isolation and reduction structure of drag-line bearing is set.
The specific embodiment
As depicted in figs. 1 and 2, the high pier bridge of a kind of sections that adopts bilayer that drag-line bearing the is set seismic isolation and reduction structure of the present embodiment, comprises from down to up stacked successively cushion cap 1, bottom pier shaft 2, top pier shaft 3 and beam body 4.Wherein, the present embodiment also comprises two the first drag-line bearings 5 and two the second drag-line bearings 6, as shown in the figure, the first drag-line bearing 5 is arranged on the end face of top pier shaft 3, beam body 4 is stacked on the end face of top pier shaft 3 by the first drag-line bearing 5, the second drag-line bearing 6 is arranged on the interface of bottom pier shaft 2 and top pier shaft 3, and top pier shaft 3 is stacked on bottom pier shaft 2 by the second drag-line bearing 6.
Concrete, as shown in the figure, the second drag-line bearing 6 of the present embodiment is positioned at the position, middle and upper part of the high pier bridge of sections seismic isolation and reduction structure, exemplary, the bottom pier shaft 2 of the present embodiment is vertically assembled by 3 steel concrete sections pieces, top pier shaft 3 is 1 steel concrete sections piece, and the height of top pier shaft 3 is set to 0.3-0.5 times of bottom pier shaft 2 height.As mentioned above, the present embodiment top pier shaft 3 adopts 1 steel concrete sections piece, simultaneously be respectively arranged with drag-line bearing in the end face of top pier shaft 3 and bottom surface and combine use, further strengthened the shock insulation ability that subtracts of the high pier bridge of sections, strengthened its safety.
The high pier bridge of the sections seismic isolation and reduction structure that the employing bilayer of the present embodiment arranges drag-line bearing is applicable to railway bridge, road bridge, urban viaduct, especially, for the high pier of segmental construction, in high earthquake intensity area, possesses outstanding shock resistance especially.The present embodiment adopts the double-deck high pier bridge of the sections seismic isolation and reduction structure that drag-line bearing is set that high tradition pier is divided into top pier shaft 3 and 2 two parts of bottom pier shaft, and by the second drag-line bearing 6, they are linked up, with the common composition of the first drag-line bearing 5 antidetonation unit, greatly improve the bending rigidity of high pier all directions; By the slippage of the first drag-line bearing 5 and the second drag-line bearing 6, significantly reduce the inertia force in macroseism situation, improved its safety, the first drag-line bearing 5 and the second drag-line bearing 6 absorb energy by friction, and can after shake, maintenance easily reset to recover its supporting capacity.
As the one conversion of the present embodiment, bottom pier shaft can adopt the steel concrete sections piece of other quantity such as 2,4 or 5 to carry out vertically assembled, and the material of steel concrete sections piece can adopt prestressed reinforced concrete, steel work or steel concrete combined material, also can adopt the new material of other types.
As another conversion of the present embodiment, the parameter (shape of cross section, planar dimension, height etc.) of top pier shaft and bottom pier shaft, parameter, requirement and the position thereof (plane and the vertical position of the first drag-line bearing and the second drag-line) of the first drag-line bearing and the second drag-line bearing all can carry out design modifying as required, repeat no more herein.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. the high pier bridge of the sections that adopts bilayer that drag-line bearing an is set seismic isolation and reduction structure, comprise from down to up stacked successively cushion cap, bottom pier shaft, top pier shaft and beam body, it is characterized in that: also comprise the first drag-line bearing and the second drag-line bearing, described the first drag-line bearing is arranged on the end face of described top pier shaft, described beam body is stacked on the end face of described top pier shaft by described the first drag-line bearing, described the second drag-line bearing is arranged on the interface of described bottom pier shaft and described top pier shaft, described top pier shaft is stacked on the pier shaft of described bottom by described the second drag-line bearing.
2. the high pier bridge of the sections seismic isolation and reduction structure that adopts bilayer that drag-line bearing is set as claimed in claim 1, is characterized in that: described bottom pier shaft is vertically assembled by 2-4 steel concrete sections piece.
3. the high pier bridge of the sections seismic isolation and reduction structure that adopts bilayer that drag-line bearing is set as claimed in claim 1 or 2, is characterized in that: described top pier shaft is 1 steel concrete sections piece.
4. the high pier bridge of the sections seismic isolation and reduction structure that adopts bilayer that drag-line bearing is set as claimed in claim 1, is characterized in that: the height of described top pier shaft equals 0.3-0.5 times of described bottom pier shaft height.
5. the high pier bridge of the sections seismic isolation and reduction structure that adopts bilayer that drag-line bearing is set as claimed in claim 1, is characterized in that: the quantity of described the first drag-line bearing is 2-4.
6. the employing bilayer as described in claim 1 or 5 arranges the high pier bridge of the sections seismic isolation and reduction structure of drag-line bearing, it is characterized in that: the quantity of described the second drag-line bearing is 2-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410060837.5A CN103806372A (en) | 2014-02-24 | 2014-02-24 | Segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers |
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| CN201410060837.5A CN103806372A (en) | 2014-02-24 | 2014-02-24 | Segment high pier bridge seismic reduction and isolation structure using inhaul cable supports arranged on double layers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755952A (en) * | 2016-04-15 | 2016-07-13 | 柳州欧维姆机械股份有限公司 | Embedded elastic rubber bearing device and construction method of applying bearing device to connection between prefabricated concrete bridge pier and pile cap |
| CN106777488A (en) * | 2016-11-18 | 2017-05-31 | 南京工业大学 | A kind of bridge safty appraisal procedure and system |
| CN112695625A (en) * | 2020-12-29 | 2021-04-23 | 朱锋 | Adopt high mound bridge of festival section of double-deck cable support to subtract shock insulation structure |
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| CN203700948U (en) * | 2014-02-24 | 2014-07-09 | 上海市城市建设设计研究总院 | Section high pier bridge seismic isolation and reduction structure with double-layer pull cable supports |
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2014
- 2014-02-24 CN CN201410060837.5A patent/CN103806372A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755952A (en) * | 2016-04-15 | 2016-07-13 | 柳州欧维姆机械股份有限公司 | Embedded elastic rubber bearing device and construction method of applying bearing device to connection between prefabricated concrete bridge pier and pile cap |
| CN106777488A (en) * | 2016-11-18 | 2017-05-31 | 南京工业大学 | A kind of bridge safty appraisal procedure and system |
| CN106777488B (en) * | 2016-11-18 | 2020-02-14 | 南京工业大学 | Bridge safety evaluation method and system |
| CN112695625A (en) * | 2020-12-29 | 2021-04-23 | 朱锋 | Adopt high mound bridge of festival section of double-deck cable support to subtract shock insulation structure |
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Application publication date: 20140521 |