CN206034274U - Longspan bridge elastoplasticity shock attenuation cable - Google Patents
Longspan bridge elastoplasticity shock attenuation cable Download PDFInfo
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- CN206034274U CN206034274U CN201621033064.2U CN201621033064U CN206034274U CN 206034274 U CN206034274 U CN 206034274U CN 201621033064 U CN201621033064 U CN 201621033064U CN 206034274 U CN206034274 U CN 206034274U
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Abstract
The utility model relates to a longspan bridge elastoplasticity shock attenuation cable, redundancy design is adopted in its cable anchor, has increased a redundant cable silk reinforcing section between anchorage zone and effective cable section. Will be greater than effective cable silk quantity in the anchorage zone with cable silk quantity in the reinforcing section, redundant cable silk is cuting in effective cable section, and it is differential with the tensile ability between effective cable section with the reinforcing section to form the anchorage zone, and then avoids latent weakness and destroy the link emergence in the anchorage zone or in strengthening section. The shock attenuation cable can provide sufficient restraint rigidity and bearing capacity under the normal use condition to possess sufficient deformability and power consumption under the macroseism condition, can show the anti -seismic performance who improves the meizoseismal area longspan bridge.
Description
Technical field
The utility model belongs to science of bridge building structural damping technical field, is related to a kind of Longspan Bridge elastoplasticity damping
Rope.
Background technology
Longspan Bridge belongs to major motor vehicle foundation engineering, is to reduce secondary disaster after shake, ensures transportation lifeline safety,
Its seismic seeurity can not look down upon.With the enforcement of China's Western Resource Development Strategy and " band is all the way " national strategy,
High-intensity earthquake region, active fault region construction Longspan Bridge have become inevitable current demand.A large amount of practice cards
It is bright：Using it is appropriate subtract, shock design is the effective ways that improve Longspan Bridge anti-seismic performance, by pier-beam, tower-beam
Appropriate seismic isolation measure is set Deng junction, and allows certain relative displacement, can significantly reduce and be transferred to substructure
Inertia force, realizes the mutual balance of structural earthquake internal force and dynamic respond.
At present, it is conventional subtract, earthquake isolating equipment can be divided into two classes：One is velocity correlation type, such as viscous damper etc., and principle is
The damping provided using liquid viscosity is consumed energy, but does not provide rigidity, and the structure boundary constraint under statical condition is not had substantially
Have an impact, under dynamic condition due to which in there is phase difference on force-responsive with structural response, therefore also will not significant increase knot
The stress of structure；Two is displacement relationship type, such as steel damping supporting seat, lead core rubber support, high-damping bearing etc., mainly using material
Surrender Hysteresis Behavior carrys out energy absorption, possesses initial stiffness and yield force, under its yield force is more than normal operating condition most
Imperial palace force-responsive and less than the interior force-responsive under earthquake, then can both provide the restriction behavior under regular service conditions, again can be
Deformation and energy dissipation behavior after larger bending is provided under seismic condition.
Meizoseismal area Longspan Bridge is designed using floating system to general in vertical bridge, is normally made because its own rigidity can meet
With demand, damping device, selecting velocity correlation type Viscous fluid damper more, it is to provide necessary power consumption, most over nearly 20 years
Longspan Bridge be all using this design system.But in direction across bridge, due to considering the Static behaviors such as wind load, tower-beam,
Pier-beam junction needs to provide powerful constraint to meet normal use requirement, and wherein at tower-beam, the bearing capacity of attachment means is needed
Ask general up to hundreds of tons；And under geological process, when using subtracting, shock design when, very big deformation demand will be produced, especially
It is relative displacement between tower-beam, general reachable more than ten centimetres to tens centimetres magnitude.In existing displacement relationship type damper,
Most widely used is steel damper, but typically cannot meet the requirement of large bearing capacity and big displacement ability simultaneously, and its low week is tired
The labor life-span is affected significantly by material and the initial microdefect of structure, and the requirement to use environment and regular maintenance is also higher；Rubber
Then vertical bearing capacity is typically small for the product of class, while durability is poor.Therefore, current overwhelming majority Longspan Bridges is horizontal
Subtract, shock design is all still limited between pier-beam, between tower-beam be all using lateral wind-resistant support it is non-subtract, shock insulation connection
Pattern, this materially increases the seismic force demand of bridge tower and destruction risk.Weng-An Dili in Greece world-famous
Father-in-law's bridge, for overcoming severe earthquake action to employ horizontal viscous damper in direction across bridge and sacrificing the damping modes of device combination, but
Large-tonnage sacrifice (350 tons) constructions of device are complicated, expensive, additionally, large-tonnage is sacrificed when device occurs to rupture to knot
The shock effect of structure is still not clear.
Elastic cable is a kind of elastic spacing attachment means, does not provide energy dissipation capacity, early stage Longspan Bridge indulge bridge to
There is certain application in Aseismatic Design.Such as day real name port central authorities bridge is provided with longitudinal steel hinge line drag-line to control between tower beam
Length travel.Elastic cable is typically made up of high-tensile steel wires or steel strand wires, therefore can easily provide larger bearing capacity；
But its effective elasticity displacement is then controlled by rope length, maximum flexibility deformation is generally the 0.8% of effective rope length, when the rope that needs are larger
During deformation, the rope length of needs is also longer.Applicant is proposed first by elastic cable and viscous damping in the design of Yongning Yellow River Bridge
Device is combined for the design of bridge horizontal shock-absorbing and successful Application, wherein elastic cable are using finished product suspension cable.But receive horizontal bridge width
Restriction, its maximum distortion only meets ± 26cm.For this purpose, applicant proposes the design of elastoplasticity damping rope, it is allowed to have concurrently
Large bearing capacity and large deformation ability, while be also equipped with certain energy dissipation capacity, and then increase substantially subtract, seismic isolation technology is in Gao Lie
Adaptability in degree earthquake areas Longspan Bridge, subtracts for Longspan Bridge, shock design provides new solution.However,
Current elastic cable and finished product suspension cable, its potential stress weak link are anchor head, do not ensure which has stable modeling
Sexual behaviour；Secondly, the suspension cable and general suspension cable for bridge lateral cushioning effect exists very big in stress
Difference, which is for example rotated to connecting structure etc. higher requirement, objectively needs purpose of design and use for damping rope
Require the new product of research and development.
Utility model content
The purpose of this utility model is to provide a kind of Longspan Bridge elastoplasticity damping rope under the conditions of macroseism, its
With stable plastic property, with large bearing capacity and large deformation ability, adapt to locking under bitter end big corner and low stretching force
Relaxation tectonic sieving, requires with excellent against weather and low-maintenance.
For reaching above-mentioned purpose, the solution that the utility model is adopted is：There is provided a kind of Longspan Bridge elastoplasticity to subtract
Shake rope, it is characterised in that：Strengthen section (2) and effective rope section (3) including anchorage zone (1), redundancy rope silk, redundancy rope silk strengthens section
(2) it is arranged between anchorage zone (1) and effective rope section (3).Strengthening in anchorage zone (1) and redundancy rope silk increase in section (2) redundancy
Rope silk (4) so that the rope silk quantity in anchorage zone (1) and redundancy rope silk enhancing section (2) is greater than effective in effective rope section (3)
The quantity of rope silk (5), redundancy rope silk (4) are blocked in effective rope section (3), and forming anchorage zone (4), redundancy rope silk strengthens section (2)
It is differential with the resistance to tension between effective rope section (3).
It is preferred that damping rope also includes that pressure rings (6), redundancy rope silk (4) and effective rope silk (5) lead in pressure rings (6)
The pressure distribution crossed in control pressure ring (6), realizes the change gradually of effective rope silk stress.
It is preferred that having the spherical hinged-support of punching (7) in anchorage zone (1).
The utility model proposes elastoplasticity damping rope, be the subtracting of meizoseismal area Longspan Bridge tower beam direction across bridge, shock insulation sets
, there is provided more simple, economic, efficient solution, its advantage is as follows for meter：
1) elastoplasticity damping rope has the advantage of large bearing capacity and large deformation ability concurrently, can either provide the initial stiffness of abundance
To meet the constraint requirements under normal operating condition, while may also provide larger deformability and certain under the conditions of macroseism
Energy dissipation capacity；
2) the deformability resilience in comparison rope of elastoplasticity drag-line can be improved to more than 3 times, can be allowed to for adapt to it is bigger,
Higher geological process, it is also possible to which it is long to reduce rope, therefore for various bridge width and geological process intensity have preferably adaptation
Property；
3) elastoplasticity damping rigging is had and is required with suspension cable identical durability and low-maintenance, and its strength of materials utilization rate
Height, lighter in weight, connecting structure are simple and reliable, change convenient, therefore also have more preferable economy；
In a word, the utility model is mainly used in Longspan Bridge direction across bridge Aseismatic Design, is particularly suited for highlight lines area,
Possesses outstanding macroseism adaptability.
Description of the drawings
With reference to the accompanying drawings and examples the utility model is further illustrated.
Fig. 1 is that elastoplasticity damping rope redundancy rope silk strengthens design drawing.
Fig. 2 is the U-shaped support of elastoplasticity damping rope and rope body protection cuff design drawing.
Fig. 3 is that elastoplasticity damping rope is used for concrete deck cable stayed bridge elevation.
Fig. 4 is that elastoplasticity damping rope is used for concrete deck cable stayed bridge three-view diagram.
In figure：1- anchorage zones, 2- redundancy ropes silk strengthen section, the effective rope sections of 3-, 4- redundancy rope silks, the effective rope silks of 5-, 6- pressures
Power ring, the spherical hinged-supports of 7-, 8-PE protective jackets, 9-U type supports, 10- ropes body protection cuff, 11- elastoplasticity damping rustling sounds pair,
The horizontal viscous dampers of 12-, 13- girders, 14- anchor blocks, 15- king-tower king-posts, 16- beam of main tower, 17- bridle irons, 18- longitudinal directions
Viscous damper.
Specific embodiment
Below in conjunction with the accompanying drawings volume specific embodiment of the present utility model is described further.
As depicted in figs. 1 and 2, the anchor-hold of elastoplasticity damping rope of the present utility model adopts Redundancy Design, in anchoring
A redundancy rope silk be increased between area 1 and effective rope section 3 strengthens section 2.Will be greatly in anchorage zone and the rope silk quantity strengthened in section
In effective rope silk quantity, redundancy rope silk 4 is blocked in effective rope section, is formed anchorage zone and is strengthened section 2 and effectively between rope section 3
Resistance to tension is differential, and then avoids potential weak and destruction link from occurring in anchorage zone or strengthen in section.Redundancy rope silk 4 and have
Effect rope silk 5 passes through the pressure distribution in control pressure ring 6 in pressure rings 6, realizes the change gradually of effective rope silk stress, and then
Avoid the stress concentration of high tensile steel wire and brittle failure in effective rope section so that the plastic property of steel wire is fully played, and then
Obtain stable plastic property.
Test shows：The maximum strain of the drag-line designed by such scheme is up to 2.5%, it can be seen that, elastoplasticity drag-line
Deformability resilience in comparison rope can improve to more than 3 times, with reference to the large bearing capacity feature of drag-line, which can be made to have large bearing capacity concurrently
The characteristics of with large deformation ability, there is more preferable adaptability to action of strong earthquake.
As it was previously stated, when damping rope is arranged on direction across bridge, Suo Changhui is limited by bridge is wide.For the floating on longitudinal direction
System Design, damping rope must also adapt to the length travel that girder is produced by temperature, earthquake effect, and this causes the rope of damping rope
End corner is by much larger than general suspension cable.The utility model employs setting for the spherical hinged-support of punching 7 at bitter end anchoring
Meter scheme.Further, since stress level of the damping rope under normal operating condition be not high, for prevent stress relaxation or
Too big sag, have also been devised U-shaped support 9 and rope body protection cuff 10.
The protection of damping rope using with suspension cable identical hot extrusion PE protective jackets 8, therefore can be with identical with suspension cable
Against weather and low maintenance, this compares viscous damper, steel damper and rubber-like cushioning product will very big carrying
It is high.
As shown in Figures 3 and 4, horizontal shock-absorbing design, the shock mitigation system of employing is employed between certain concrete deck cable stayed bridge tower beam
11 (arranging in pairs) and horizontal viscous damper 12 are made up of elastoplasticity damping rustling sound.Damping rope has two pairs, every damping
Suo Yiduan is anchored on the anchor block 14 with 13 one-piece casting of girder, and the other end is anchored on the king-tower king-post 15 of opposite side, and two
Bar damping rope is arranged symmetrically.12 one end of viscous damper is anchored in the beam bottom of girder 13, and the other end is anchored in beam of main tower 16
On.As can be seen from Figure 4, damping rustling sound to 11 and horizontal viscous damper 12 with bridle iron 17 and longitudinal direction viscous damper 18 in sky
Between it is harmonious in layout, mutually do not conflict.
As one kind conversion of the utility model embodiment, king-tower parameter (profile, sectional dimension etc.), elastoplasticity damping rope
Position can be designed adjustment as needed.
Used as one kind conversion of the utility model embodiment, elastoplasticity damping rope can be used between girder and king-tower,
Can apply between girder and auxiliary pier, transition pier.
Used as another conversion of the utility model embodiment, bridge structure may belong to cable-stayed bridge, suspension bridge, arch bridge,
It can also be the beam bridge of large span (50m and above single span across footpath).
The above-mentioned description to embodiment is not the restriction to the utility model scheme, therefore, protection of the present utility model
Scope is not limited solely to above-described embodiment, any according to only pro forma rather than real done by the utility model design
The various modifications and improvements of matter, as long as damping form of the structure comprising elastoplasticity damping rope, are regarded as new in this practicality
Within the protection domain of type.
Claims (3)
1. a kind of Longspan Bridge elastoplasticity damping rope, it is characterised in that：Including anchorage zone (1), redundancy rope silk strengthen section (2) and
Effective rope section (3), redundancy rope silk strengthen section (2) and are arranged between anchorage zone (1) and effective rope section (3)；Anchorage zone (1) and superfluous
Yu Suosi strengthens increase in section (2) redundancy rope silk (4) so that anchorage zone (1) and redundancy rope silk strengthen the rope silk quantity in section (2)
The quantity of effective rope silk (5) that are greater than in effective rope section (3), redundancy rope silk (4) are blocked in effective rope section (3), form anchor
It is differential with the resistance to tension between effective rope section (3) that Gu Qu (1), redundancy rope silk strengthen section (2).
2. elastoplasticity damping rope according to claim 1, it is characterised in that：Also include pressure rings (6), the redundancy rope silk
(4) and effective rope silk (5) in the pressure rings (6) by the pressure distribution in control pressure ring (6), realize effective rope silk stress
Gradually change.
3. elastoplasticity damping rope according to claim 2, it is characterised in that：There is in anchorage zone (1) the spherical hinge of punching
Bearing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033064.2U CN206034274U (en) | 2016-08-31 | 2016-08-31 | Longspan bridge elastoplasticity shock attenuation cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033064.2U CN206034274U (en) | 2016-08-31 | 2016-08-31 | Longspan bridge elastoplasticity shock attenuation cable |
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| Publication Number | Publication Date |
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| CN206034274U true CN206034274U (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621033064.2U Active CN206034274U (en) | 2016-08-31 | 2016-08-31 | Longspan bridge elastoplasticity shock attenuation cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320163A (en) * | 2016-08-31 | 2017-01-11 | 中国路桥工程有限责任公司 | Elastic-plastic damping cable for transverse damping of large-span bridge |
-
2016
- 2016-08-31 CN CN201621033064.2U patent/CN206034274U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320163A (en) * | 2016-08-31 | 2017-01-11 | 中国路桥工程有限责任公司 | Elastic-plastic damping cable for transverse damping of large-span bridge |
| CN106320163B (en) * | 2016-08-31 | 2017-12-05 | 中国路桥工程有限责任公司 | A kind of elastoplasticity damping rope for Longspan Bridge horizontal shock-absorbing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |