CN101672004B - Shape memory alloy lazy halyard vibration damper for suspension bridge - Google Patents

Shape memory alloy lazy halyard vibration damper for suspension bridge Download PDF

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Publication number
CN101672004B
CN101672004B CN2009100936576A CN200910093657A CN101672004B CN 101672004 B CN101672004 B CN 101672004B CN 2009100936576 A CN2009100936576 A CN 2009100936576A CN 200910093657 A CN200910093657 A CN 200910093657A CN 101672004 B CN101672004 B CN 101672004B
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China
Prior art keywords
lazy halyard
suspension bridge
memory alloy
alloy wire
shape
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Expired - Fee Related
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CN2009100936576A
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Chinese (zh)
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CN101672004A (en
Inventor
何浩祥
陈彦江
陈适才
李勇
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Beijing University of Technology
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Beijing University of Technology
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Abstract

The invention relates to a shape memory alloy lazy halyard vibration damper for a suspension bridge, belonging to the technical field of wind resistance, vibration resistance and vibration damping for bridge engineering, and comprising a lazy halyard, a shape memory alloy wire, a hoop connected with an external sleeve of a main cable of the suspension bridge, an external sleeve of the lazy halyard and the shape memory alloy wire, a connection bolt bar of the hoop of the external sleeve of the main cable, a connection bolt hole member of the hoop of the external sleeve of the main cable, a connection member of the lazy halyard and the shape memory alloy wire, and a fixed end member of the lazy halyard and a beam anchor. The lazy halyard and the shape memory alloy wire are arranged in different manners to be connected with the main cable of the suspension bridge via the connecting member, thereby improving the integral torsional rigidity of a bridge. Meanwhile, the shape memory alloy wire has the characteristics of shape memory effect and super-elastic effect in the case of the deformations of both the main cable of the suspension bridge and the lazy halyard, performs vibration damping and energy consumption for further reducing the vibration of the bridge, especially adapted to energy consumption and vibration damping under the action of a hurricane and strong vibration. In addition, the damper is simply constructed and conveniently mounted with obvious effect.

Description

The marmem vibration damping lazy halyard device that is used for suspension bridge
Technical field
The present invention relates to a kind of marmem vibration damping lazy halyard device that is used for suspension bridge, belong to bridge engineering wind resistance and antidetonation and cushion technique field.
Background technology
Suspension bridge is with the cable that the bears pulling force bridge as main supporting member, partly is made up of suspension cable, Sarasota, anchorage, suspension rod, bridge deck etc.Because suspension bridge is bigger than the span ability of beam bridge, in bridge construction, be widely used, be the main bridge type of Longspan Bridge.Along with improving constantly of bridge design and construction level, the span of modern suspension constantly increases, and integral bridge rigidity sharply descends.Length of warping winch as the main supporting member of suspension bridge constantly increases, and it is wide that it is flexible greatly, internal damping is low, intrinsic frequency distributes, and very easily vibrates under the beam tower displacement effect of wind, wind and rain, earthquake and supported end.
The suspension bridge cable cause the mechanism of shaking in a minute complexity.According to the difference of driving source, the main oscillatory type of cable can be divided into two classes: a class is the cable vibration that wind or wind and rain acting in conjunction cause, the another kind of vibration that takes place under beam tower displacement effect for the cable support end.At present, Passive Control is to suppress the main means of cable vibration, and major measure comprises: change the cable surface configuration to change the dynamic characteristics of rope; Tuned mass damper etc. is installed at the important cross section of girder two ends.To the cable on the suspension bridge, use viscoelastic damper to be control appliance usually.Yet simple Passive Control cable vibration is not the optimal selection of vibration isolation, and tuned mass damper is to the vibration isolation DeGrain of Longspan Bridge integral body.For long cable, the vibration that common damper can't provide enough dampings to come control cord probably, thus Passive Control was lost efficacy.So cheap, the diverse in function of development cost, respond well vibration absorber has great engineering significance.
Summary of the invention
The present invention proposes a kind of marmem vibration damping lazy halyard device that is used for suspension bridge.Marmem in this device is a kind of new function material and intellectual material.Compare with common damping material, it has characteristics such as unique shape memory effect, superelastic effect. utilize the energy-dissipating device of super elastic shape memory alloy effect design to have durability and corrosion resistant performance good, the operating period limit for length allows advantages such as large deformation and distortion can recover.Bear under high wind and the geological process at suspension bridge, this device can be combined to form rope net system with main rope, the distortion and the vibration of restriction cable, increase the damping of cable, improve integral power performance and air force character, dissipation energy effectively, the vibration that alleviates bridge main body, thus guarantee stability, applicability and the safety of bridge.This device has convenient, the comprehensive vibration damping outstanding effect characteristics of construction.
To achieve these goals, the present invention has taked following technical scheme.The external surface that the present invention includes lazy halyard, shape-memory alloy wire, first cuff that is connected with the main rope of suspension bridge outer sleeve and be fixed on first cuff is used for second cuff that lazy halyard passes.Wherein: an end of lazy halyard passes second cuff, and with the clamping anchoring of lazy halyard top, the other end and shape-memory alloy wire are affixed, shape-memory alloy wire is affixed with lazy halyard again, the two connects successively according to this mode, last one is lazy halyard, and the girder or the main push-towing rope of last root lazy halyard and suspension bridge are affixed.
The diameter of described lazy halyard is 0.2~0.5 times of main rope of suspension bridge rope diameter, and material is identical with cable wire material in the main rope of suspension bridge, and the internal diameter of first cuff is 1.0~1.2 times of lazy halyard diameter.
The diameter of described shape-memory alloy wire is 0.02~0.1 times of main rope of suspension bridge rope diameter, and length is more than or equal to 0.2 times of lazy halyard length.
The material of described shape-memory alloy wire is Ni-Ti alloy or Ti-Ni-Pd alloy or Cu-Zn alloy or Cu-Zn-Al alloy, and its intensity should be more than or equal to 0.5 times of lazy halyard intensity.
Through the butt joint of bolt screw rod, banding is on main rope of suspension bridge by two ring-like shaped steel of semicircle for described first cuff, and the internal diameter of first cuff is identical with the main rope of suspension bridge external diameter.
Be connected by connecting elements between described lazy halyard and the shape-memory alloy wire, the structure of described connecting elements is: connecting elements is formed by plural metal ring link, and the metal ring two ends are closely twined affixed with shape-memory alloy wire and lazy halyard respectively; Anchor connection between the girder of described last root lazy halyard and suspension bridge.
The intensity of the anchored end of the intensity of described connecting elements and lazy halyard and girder all is greater than lazy halyard and shape-memory alloy wire 1.5 times of bigger intensity in the two.
To strain when described lazy halyard and shape-memory alloy wire are installed, all not occur negative pulling force in the time of will guaranteeing the main rope of suspension bridge vibration in principle.
Lazy halyard and shape-memory alloy wire can constitute horizontal damping form, and promptly the two mainly connects with two parallel main push-towing ropes of suspension bridge; Also can constitute direction across bridge damping form, promptly the two mainly is connected with the main push-towing rope and the girder of a suspension bridge.Purpose is the whole torsional rigidity that improves suspension bridge.
Compared with prior art, advantage of the present invention is as follows:
1) the present invention links to each other the original part cable of lazy halyard and suspension bridge, forms new rope web frame system.The torsional rigidity and the stability of suspension bridge have been improved.
2) the lazy halyard vibration reducing measure is specially adapted to the overlength guy system of large-span suspension bridge, to suppressing parametric vibration and linear internal resonance in dividing effectively.
3) the present invention adopts shape-memory alloy wire and lazy halyard with good characteristics such as shape memory effect, superelastic effect to form the heavy damping device, further strengthen the energy-dissipating property and the large deformation ability of device, especially be fit to the energy-dissipating and shock-absorbing under hurricane and the severe earthquake action.
4) device does not have complicated structure, and it is convenient to install, and effect is obvious.
Description of drawings
Fig. 1 3-D view of the present invention;
Fig. 2 the present invention is along the cable cross-sectional view;
Fig. 3 the present invention is along the lazy halyard cross-sectional view;
Lazy halyard that Fig. 4 is of the present invention and girder anchored end member side sectional view;
One of Fig. 5 horizontal damping form of the present invention;
Two of Fig. 6 horizontal damping form of the present invention;
One of Fig. 7 direction across bridge damping of the present invention form;
Two of Fig. 8 direction across bridge damping of the present invention form;
Among the figure: 1, lazy halyard, 2, shape-memory alloy wire, 3, first cuff, 4, second cuff, 5, shank of bolt, 6, bolt hole, 7, connecting elements, 8, lazy halyard and girder anchored end member, 9, main rope of suspension bridge, 10, girder of suspension bridge, 11, bellows, 12, spiral bar, 13, constraint circle, 14, presstressed reinforcing steel, 15, anchor slab, 16, extruded sleeve.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Embodiment 1:
As Fig. 1~shown in Figure 8, present embodiment mainly comprises lazy halyard 1, shape-memory alloy wire 2, first cuff 3, second cuff 4, connecting bolt bar 5, connecting bolt hole part 6, connecting elements 7, lazy halyard and the girder anchored end member 8, the main rope of suspension bridge 9 that link to each other with the main rope of suspension bridge outer sleeve, girder of suspension bridge 10 etc.Wherein: an end of lazy halyard passes second cuff 4, and with the clamping anchoring of lazy halyard top, the other end and shape-memory alloy wire 2 are affixed, shape-memory alloy wire 2 is affixed with lazy halyard again, the two connects successively according to this mode, last one is lazy halyard, and the girder or the main push-towing rope of last root lazy halyard and suspension bridge are affixed.
As shown in Figure 2, first cuff 3 that links to each other with the main rope of suspension bridge outer sleeve is made up of two ring-like shaped steel of semicircle, and its internal diameter is identical with the main rope of suspension bridge external diameter.Two ring-like shaped steel of semicircle are provided with bolt hole 6, and shank of bolt 5 passes bolt hole 6 two shaped steel are docked, and make its banding on main rope of suspension bridge, and second cuff 4 is welded on the external surface of first cuff 3, and the centre is provided with and is used for the hole that lazy halyard 1 passes.After first cuff 3 and 4 welding of second cuff, guarantee the compatible deformation of main rope of suspension bridge, shape-memory alloy wire and lazy halyard.
The diameter of lazy halyard is 0.3 times of main rope of suspension bridge rope diameter, and material is consistent or similar with main rope of suspension bridge cable wire material.Lazy halyard internal diameter outside and the shape-memory alloy wire cuff is 1.0 to 1.2 times of lazy halyard diameter.
The diameter of shape-memory alloy wire is 0.05 times of main rope of suspension bridge rope diameter, and length is more than or equal to 0.2 times of lazy halyard length.Material can be Ni-Ti alloy or Ti-Ni-Pd alloy or Cu-Zn alloy or Cu-Zn-Al alloy, and its intensity should be not less than 0.5 times of lazy halyard intensity.
Lazy halyard is fixedlyed connected by connecting elements 7 with shape-memory alloy wire, and connecting elements 7 structures are: connecting elements 7 is formed by plural metal ring link, and two ends are closely twined affixed with shape-memory alloy wire 2 and lazy halyard 1 respectively.Anchor connection between the girder of last root lazy halyard and suspension bridge, as shown in Figure 4.The intensity of the anchored end member of the intensity of connecting elements 7 and lazy halyard and girder need be greater than lazy halyard and shape-memory alloy wire 1.5 times than hard intensity in the two.
According to actual requirement, lazy halyard both can serve as the interim rope of construction in work progress, also can unify to lay after the bridge floor installation.Should suitably strain when lazy halyard and shape-memory alloy wire are installed, all not occur negative pulling force in the time of should guaranteeing the main rope of suspension bridge vibration in principle.
The present embodiment lazy halyard is connected with main rope of suspension bridge by connector in different arrangement with shape-memory alloy wire, improves the integral bridge torsional rigidity.Simultaneously shape-memory alloy wire has characteristics such as shape memory effect, superelastic effect under the situation that main rope of suspension bridge and lazy halyard deform, and carries out oscillation damping and energy dissipating, further alleviates the vibration of bridge.
Horizontal damping form in the present embodiment, as shown in Figure 5, be that lazy halyard 1 and shape-memory alloy wire 2 are connected the situation between two parallel main push-towing ropes of suspension bridge, at first, the material that guarantees lazy halyard 1 is identical with main rope of suspension bridge cable wire material, and the diameter of lazy halyard 1 is 0.3 times of main rope of suspension bridge rope diameter.Determine the concrete installation site of lazy halyard 1 according to main rope of suspension bridge damping position.Secondly, determine the material and the length of shape-memory alloy wire 2, determine length afterwards respectively near the lazy halyard 1 at suspension bridge cable two ends.
At the damping position of main rope of suspension bridge 9 first cables, shank of bolt 5 passes bolt hole 6 with the outside of first cuff, 3 bandings at first cables of suspension bridge cable 9.Then lazy halyard 1 is pierced into second cuff 4, and the lazy halyard top is clamped anchoring.By connecting elements 7 will near main rope of suspension bridge 9 first cables lazy halyard 1 lower end closely be connected with shape-memory alloy wire 2 upper ends, will guarantee under the bridge normal vibration, not take place relative displacement.Equally, by connecting elements 7 lazy halyard 1 of shape-memory alloy wire 2 lower ends with close main rope of suspension bridge 9 second cables closely is connected.At the damping position of main rope of suspension bridge 9 second cables, use with the connecting bolt bar 5 of cable outer sleeve cuff and connecting bolt hole part 6 cuff 3 at the outside banding of second cables of suspension bridge cable 9.Should apply pretension suitably for shape-memory alloy wire 2 during banding, all not occur negative pulling force in the time of should guaranteeing the main rope of suspension bridge vibration in principle.
Embodiment 2:
The structure of present embodiment is substantially the same manner as Example 1, and difference only is that present embodiment is for direction across bridge damping form, and promptly lazy halyard 1 and shape-memory alloy wire 2 are connected between the main push-towing rope and girder of a suspension bridge, as Fig. 6 ~ shown in Figure 8.
At first, guarantee that the material of lazy halyard 1 is consistent with main rope of suspension bridge cable wire material, the diameter of lazy halyard 1 is 0.2 to 0.5 times of main rope of suspension bridge rope diameter.Determine the concrete installation site of lazy halyard 1 according to main rope of suspension bridge damping position.Secondly, determine the material and the length of shape-memory alloy wire 2, determine length afterwards respectively near the lazy halyard 1 of suspension bridge cable one end and close girder one end.
At the damping position of main rope of suspension bridge 9, use with the connecting bolt bar 5 of main push-towing rope outer sleeve cuff and connecting bolt hole part 6 with cuff 3 banding outside suspension bridge cable 9.Lazy halyard 1 is pierced into lazy halyard and the outside cuff 4 of shape-memory alloy wire, and the top is clamped anchoring.To closely be connected with shape-memory alloy wire 2 upper ends near lazy halyard 1 lower end of suspension bridge cable one end by connecting elements 7, will guarantee under the bridge normal vibration, not take place relative displacement.Equally, by connecting elements 7 lazy halyard 1 upper end of shape-memory alloy wire 2 lower ends with close girder one end closely is connected.At last, with lazy halyard 1 and girder of suspension bridge 10 prestretching anchorings, should suitably strain during anchoring, all not occur negative pulling force in the time of should guaranteeing the main rope of suspension bridge vibration in principle with anchored end member 8.
More than be two exemplary embodiments of the present invention, but enforcement of the present invention is not limited thereto.

Claims (8)

1. marmem vibration damping lazy halyard device that is used for suspension bridge comprises: lazy halyard (1), shape-memory alloy wire (2), first cuff (3) that is connected with the main rope of suspension bridge outer sleeve and be fixed on the first cuff external surface and be used for second cuff (4) that lazy halyard (1) passes; Wherein: an end of lazy halyard passes second cuff (4), and with the clamping anchoring of lazy halyard top, the other end and shape-memory alloy wire (2) are affixed, shape-memory alloy wire (2) is affixed with lazy halyard again, the two connects successively according to this mode, last one is lazy halyard, and the girder or the main push-towing rope of last root lazy halyard and suspension bridge are affixed.
2. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 1, it is characterized in that: the diameter of described lazy halyard (1) is 0.2~0.5 times of rope diameter in the main rope of suspension bridge, material is identical with cable wire material in the main rope of suspension bridge, and the internal diameter of first cuff (3) is 1.0~1.2 times of lazy halyard (1) diameter.
3. according to claim 1 or the described a kind of marmem vibration damping lazy halyard device that is used for suspension bridge of claim 2, it is characterized in that: the diameter of described shape-memory alloy wire (2) is 0.02~0.1 times of main rope of suspension bridge rope diameter, and length is more than or equal to 0.2 times of lazy halyard length.
4. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 1, it is characterized in that: the material of described shape-memory alloy wire (2) is Ni-Ti alloy or Ti-Ni-Pd alloy or Cu-Zn alloy or Cu-Zn-Al alloy, and its intensity should be more than or equal to 0.5 times of lazy halyard (1) intensity.
5. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 1, it is characterized in that: described first cuff (3) is docked through the bolt screw rod by two semi-round ring shape shaped steel, banding is on the main rope of suspension bridge outer sleeve, and the internal diameter of first cuff (3) is identical with the main rope of suspension bridge external diameter.
6. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 1, it is characterized in that: be connected by connecting elements (7) between described lazy halyard (1) and the shape-memory alloy wire (2), the structure of described connecting elements (7) is: connecting elements (7) is formed by plural metal ring link, and the metal ring two ends are affixed with shape-memory alloy wire (2) and lazy halyard (1) respectively; Anchor connection between the girder of described last root lazy halyard and suspension bridge.
7. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 6 is characterized in that: the intensity of the anchored end of the intensity of described connecting elements (7) and lazy halyard (1) and girder all is greater than lazy halyard (1) and shape-memory alloy wire (2) 1.5 times of bigger intensity in the two.
8. a kind of marmem vibration damping lazy halyard device that is used for suspension bridge according to claim 1, it is characterized in that: will strain when described lazy halyard (1) and shape-memory alloy wire (2) are installed, all not occur negative pulling force in the time of will guaranteeing the main rope of suspension bridge vibration in principle.
CN2009100936576A 2009-09-25 2009-09-25 Shape memory alloy lazy halyard vibration damper for suspension bridge Expired - Fee Related CN101672004B (en)

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RU2606715C2 (en) * 2012-03-08 2017-01-10 Дзе Юэрепиен Юнион, Репрезентед Бай Дзе Юэрепиен Кемишн Method for protecting taut cables from vibrations

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CN102409604B (en) * 2011-09-01 2013-12-25 哈尔滨工业大学 Device for damping and protecting bridge structural suspender
CN102493365B (en) * 2011-11-26 2013-10-16 广州大学 Reinforced structure of half-through single-cable-plane arch bridge
CN105317006B (en) * 2015-10-30 2017-01-18 深圳大学 Cable bearing bridge and auxiliary cable monitoring and damping system thereof
CN111691286A (en) * 2020-06-05 2020-09-22 中交第二公路勘察设计研究院有限公司 Suspension bridge hinged energy-consuming damping buckle structure
CN112696076A (en) * 2020-12-26 2021-04-23 北京工业大学 SMA is from restoring to throne isolation bearing

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