CN111364347A - Stay cable built-in damping structure and installation method thereof - Google Patents
Stay cable built-in damping structure and installation method thereof Download PDFInfo
- Publication number
- CN111364347A CN111364347A CN202010170160.6A CN202010170160A CN111364347A CN 111364347 A CN111364347 A CN 111364347A CN 202010170160 A CN202010170160 A CN 202010170160A CN 111364347 A CN111364347 A CN 111364347A
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- Prior art keywords
- split type
- cable
- extension pipe
- split
- stay cable
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- 238000013016 damping Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 4
- 238000009434 installation Methods 0.000 title description 8
- 239000000725 suspension Substances 0.000 claims description 10
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a built-in damping structure of a stay cable, which comprises a split type extension pipe, a plurality of guide cylinders, a split type cable clamp, a plurality of hydraulic dampers and a plurality of connecting plates, wherein the split type cable clamp clamps the stay cable, the split type extension pipe is arranged outside the stay cable, the guide cylinders are uniformly arranged on the periphery of the split type extension pipe in the circumferential direction and are radially communicated with the split type extension pipe, the hydraulic dampers are respectively and correspondingly arranged in the guide cylinders one by one, the near end of each hydraulic damper is hinged with the split type cable clamp, the far end of each hydraulic damper is hinged with one connecting plate, and the connecting plates are fixed with the guide cylinders. The radial built-in damping structure has vibration reduction and landscape effects and is also beneficial to later maintenance.
Description
Technical Field
The invention relates to a damping structure for damping a cable body, in particular to a built-in damping structure for a stay cable.
Background
The stay cable is one of a cable-stayed bridge and a core stressed member. Wind-induced vibration such as vortex excitation, wind and rain vibration, wake flow galloping, buffeting and the like easily cause fatigue of the anchoring end of a stay cable of the cable-stayed bridge, and meanwhile, the vibration accelerates the failure of a sealing member of the stay cable, so that the corrosion of the stay cable is accelerated, and the service life of the stay cable is seriously influenced. The damper is arranged at the end part of the stay cable to provide additional damping for the stay cable, so that the structural damping of the stay cable is improved, and the mode damping of the stay cable is increased, which is a common mode for inhibiting the vibration of the stay cable.
The common external damper has better vibration reduction effect due to higher installation height, but has larger influence on the landscape effect of the whole bridge. The built-in extrusion type high-damping rubber damper is low in installation height, does not affect landscape basically, but has unsatisfactory damping effect on the whole stay cable due to damping characteristics and installation position.
Publication No. CN110331655A discloses a bridge inhaul cable wind-resistant shock-absorbing member, which belongs to an external wind-resistant shock-absorbing member, wherein a first stop connecting piece and a second stop connecting piece in the member are provided with stop connecting structures, so that the damper can be prevented from sliding along the length direction of the inhaul cable, and the stability of the structure is improved. But also the space structure of the whole anti-seismic component is increased, and the landscape of the bridge is influenced.
The requirements on the stay cable damper not only on the vibration reduction effect, but also pay attention to factors in aspects of landscape coordination, later maintenance management, durability and the like. Considering comprehensive factors such as the damping of the cable-stayed bridge, the landscape and the like, a damper with the vibration damping and the landscape effects needs to be developed.
Disclosure of Invention
The invention provides a built-in damping structure of a stay cable aiming at the prior art, belongs to radial damping and is arranged in the extending direction of a buried pipe of the stay cable.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a built-in damping structure of suspension cable, includes split type extension pipe, a plurality of guide cylinder, split type cable clamp, a plurality of hydraulic damper, a plurality of connecting plate, split type extension pipe sets up outside the suspension cable, split type cable clamp sets up within the split type extension pipe and cramp the suspension cable, a plurality of guide cylinder ring is evenly set up split type extension pipe periphery and with split type extension pipe radial link up, a plurality of hydraulic damper arrange respectively the one-to-one inside a plurality of guide cylinder, each hydraulic damper's near-end with split type cable clamp is articulated, the distal end with one the connecting plate is articulated, the connecting plate again with the guide cylinder is fixed.
Preferably, the split type extension pipe is formed by enclosing and connecting a plurality of arc-shaped plates.
Preferably, the pipe wall of the split type extension pipe is provided with a plurality of branch pipes, the plurality of branch pipes are uniformly arranged in the circumferential direction, and the plurality of guide cylinders are in one-to-one correspondence flange connection with the plurality of branch pipes.
Preferably, the split cable clamp is formed by folding two semicircular pieces.
Preferably, be provided with a plurality of otic placodes on the split type cable clamp hoop outer wall, be provided with the otic placode on a plurality of connecting plates respectively, a plurality of hydraulic damper's near-end and distal end are provided with the otic placode respectively, hydraulic damper's near-end with between the split type cable clamp hoop, hydraulic damper's distal end with realize articulating through otic placode and round pin axle respectively between the connecting plate.
Preferably, the inner wall of the split cable clamp is provided with a silicone rubber lining with the thickness of 4 mm-10 mm for protecting the stay cable, and the silicone rubber lining can also be used for consuming the vibration stress.
Preferably, the end of the split extension pipe is provided with a connecting flange for butting the stay cable embedded pipe.
The method for installing the stay cable built-in damping structure refers to the following steps
(1) A split cable clamp with a lining is arranged on the stay cable, and the stay cable is tightly embraced by the split cable clamp;
(2) hinging the near end of the hydraulic damper with the split cable clamp hoop, hinging the connecting plate to the far end of the hydraulic damper, and respectively radially acting the plurality of hydraulic dampers on the split cable clamp hoop;
(3) installing a split type extension pipe, wherein the split type extension pipe is installed outside the stay cable, and a plurality of hydraulic dampers penetrate through a plurality of branch pipes in a one-to-one correspondence manner;
(4) and a plurality of guide cylinders are sleeved outside the plurality of hydraulic dampers in a one-to-one correspondence manner, the plurality of guide cylinders are connected with the plurality of branch pipe flanges, and then the connecting plate at the far end of each hydraulic damper is fixedly connected with the guide cylinders.
Compared with the prior art, the invention has the advantages that: the hydraulic damper is not exposed, can be effectively protected, and does not affect the landscape of the bridge. The plurality of hydraulic dampers are used for eliminating stress of the stay cables in the radial direction respectively, so that the vibration reduction effect is better.
Drawings
FIG. 1 is a perspective structural view of an internal damping structure according to an embodiment of the present invention;
FIG. 2 is a partial perspective structural view of an internal damping structure according to an embodiment of the present invention;
FIG. 3 is a view showing an installation structure of a hydraulic damper according to an embodiment of the present invention;
FIG. 4 is a top plan view of the hydraulic damper mounting structure shown in FIG. 3;
FIG. 5 is a perspective view of a split extension pipe according to an embodiment of the present invention;
FIG. 6 is a perspective view of a guide cylinder according to an embodiment of the present invention;
FIG. 7 is a perspective view of a hydraulic damper of an embodiment of the present invention;
in the figure, 1 a stay cable, 2 a split type extension pipe, 3 a guide cylinder, 4 a split type cable clamp, 5a hydraulic damper, 6 a connecting plate, 7 double lug plates, 8 a single lug plate and 9 branch pipes.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawing, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The built-in damping structure of this embodiment is for pleasing to the eye and practical consideration, radially arrange three hydraulic damper 5 around suspension cable 1 according to 120 degrees angle through auxiliary structure, 2 outer walls of split type extension pipe are provided with three branch pipe 9 each other into 120, three branch pipe 9 and 3 one-to-one flange joint of three guide cylinder, split type extension pipe 2 is formed by the concatenation of three 120 arc, adopt bolted connection to conveniently assemble the dismantlement between the arc, three hydraulic damper 5 sets up respectively inside three guide cylinder 3, the guide cylinder is the logical body of flanged, punch on the flange edge, pass through bolted connection with split type extension pipe 2, punch on the barrel bottom plate.
Adopt split type cable clamp 4 to hold tightly suspension cable 1, split type cable clamp 4 is half formula structure, and two semicircle spares are bolted connection, and the rubber pad of 4 millimeters-10 millimeters thickness is filled up between the inner wall of semicircle spare and the suspension cable, ensures can not cause the damage to the suspension cable. The hydraulic damper 5 should be accurate and firm in positioning, easy to install, simple and light in structure, and have sufficient strength, rigidity and fatigue resistance, and the PE sleeve on the surface of the stay cable cannot be damaged under the action of long-term cyclic load. The outer wall of the split cable clamp 4 is provided with three pairs of double lug plates 7 which form an angle of 120 degrees with each other.
The far and near ends of each hydraulic damper 5 are respectively provided with a single lug plate 8, the near ends are hinged with double lug plates on the stay cable clamp hoop through pins, and the outer ends are hinged with the double lug plates on the connecting plate 6 through pins. The connecting plate 6 is positioned inside the guide cylinder 3, and 4 to 5 threaded through holes are formed in the connecting plate 6 and used for connecting the connecting plate 6 with the guide cylinder 3.
In order to improve the damping effect of the built-in radial damper, the hydraulic damper 5 is preferably a cylinder hole gap type viscous damper, and the energy consumption mechanism of the component mainly utilizes the interaction of a viscous medium and a damper structural part to consume energy so as to achieve the purposes of consuming the vibration energy of an input structure and ensuring the structural safety. Therefore, the selection of the damping medium is crucial to the structural viscous damper. In the embodiment, methyl silicone oil is selected as a damping viscous medium of the damper. Has the following characteristics: (1) has a certain viscosity: (2) the compressibility is small; (3) the chemical stability is good; (4) the viscosity is insensitive along with the temperature and the cold resistance is good; (5) non-flammable, non-volatile, non-toxic, etc. The damping medium of the damper is filled in a cavity defined by the oil cylinder, the guide rod and the piston, the damping hole forms a circulation channel, and the sealing material ensures that the damping medium does not leak.
The damping structure installation scheme of the embodiment is as follows:
1) assembling the hydraulic damper in place according to a drawing in a factory and checking according to the drawing;
2) and after the stay cable is installed and tensioned, a split cable clamp and a hydraulic damper are installed.
3) The hydraulic damper is arranged at the position of an upper end pipe orifice of the stay cable beam end embedded pipe, and the split type cable clamp and the hydraulic damper are sequentially arranged on site.
4) Finally, the bracket member and other accessory members are installed.
The specific installation sequence is as follows:
the first step is as follows: two half-Harvard-shaped split cable clamps are arranged on the stay cable;
the second step is that: hydraulic dampers are installed and each component is secured in place.
The third step: installing a split type extension pipe, and enabling the three hydraulic dampers to respectively extend out of the three branch pipes;
the fourth step: the three guide cylinders are sleeved outside the hydraulic damper and connected with the branch pipe flange, and the connecting plate and the bottom plate of the guide cylinder are locked through bolts.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a built-in damping structure of suspension cable which characterized in that: including split type extension pipe, a plurality of guide cylinder, split type cable clamp, a plurality of hydraulic damper, a plurality of connecting plate, split type extension pipe sets up at the suspension cable outside, split type cable clamp sets up within the split type extension pipe and cramp the suspension cable, a plurality of guide cylinder ring is evenly set up split type extension pipe periphery and with split type extension pipe radially link up, a plurality of hydraulic damper one-to-one respectively arranges inside a plurality of guide cylinders, the near-end of each hydraulic damper with split type cable clamp is articulated, the distal end and one the connecting plate is articulated, the connecting plate again with the guide cylinder is fixed.
2. The stay cable built-in damping structure according to claim 1, characterized in that: the split type extension pipe is formed by inclusion and connection of a plurality of arc-shaped plates.
3. The stay cable built-in damping structure according to claim 1, characterized in that: the pipe wall of the split type extension pipe is provided with a plurality of branch pipes, the plurality of branch pipes are annularly and uniformly arranged, and the plurality of guide cylinders are connected with the plurality of branch pipes in a one-to-one correspondence manner through flanges.
4. The stay cable built-in damping structure according to claim 1, characterized in that: the split cable clamp is formed by folding two semicircular pieces.
5. The stay cable built-in damping structure according to claim 1, characterized in that: be provided with a plurality of otic placodes on the split type cable clamp hoop outer wall, be provided with the otic placode on a plurality of connecting plates respectively, the near-end and the distal end of a plurality of hydraulic damper are provided with the otic placode respectively, the near-end of hydraulic damper with between the split type cable clamp hoop, the distal end of hydraulic damper with realize articulatedly through otic placode and round pin axle respectively between the connecting plate.
6. The stay cable built-in damping structure according to claim 1, characterized in that: the inner wall of the split cable clamp is provided with a silicon rubber lining with the thickness of 4 mm-10 mm.
7. The stay cable built-in damping structure according to claim 1, characterized in that: and the end part of the split type extension pipe is provided with a connecting flange for butting the stay cable embedded pipe.
8. A method for installing a stay cable built-in damping structure according to any one of claims 1 to 7, wherein: the steps are as follows
(1) A split cable clamp with a lining is arranged on the stay cable, and the stay cable is tightly embraced by the split cable clamp;
(2) hinging the near end of the hydraulic damper with the split cable clamp hoop, hinging the connecting plate to the far end of the hydraulic damper, and respectively radially acting the plurality of hydraulic dampers on the split cable clamp hoop;
(3) installing a split type extension pipe, wherein the split type extension pipe is installed outside the stay cable, and a plurality of hydraulic dampers penetrate through a plurality of branch pipes in a one-to-one correspondence manner;
(4) and a plurality of guide cylinders are sleeved outside the plurality of hydraulic dampers in a one-to-one correspondence manner, the plurality of guide cylinders are connected with the plurality of branch pipe flanges, and then the connecting plate at the far end of each hydraulic damper is fixedly connected with the guide cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170160.6A CN111364347A (en) | 2020-03-12 | 2020-03-12 | Stay cable built-in damping structure and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170160.6A CN111364347A (en) | 2020-03-12 | 2020-03-12 | Stay cable built-in damping structure and installation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111364347A true CN111364347A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010170160.6A Pending CN111364347A (en) | 2020-03-12 | 2020-03-12 | Stay cable built-in damping structure and installation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1590649A (en) * | 2003-09-03 | 2005-03-09 | 国际弗里希尼特斯特普公司 | Device for damping of vibrations in cables and method therefor |
| KR100936083B1 (en) * | 2009-05-22 | 2010-01-12 | 케이블텍 주식회사 | Cable damper |
| KR101873363B1 (en) * | 2018-04-26 | 2018-07-03 | 주식회사 한국교량 | Cable damper having magnetic-hydraulic damper of symmetric hydraulic line, and method for controlling cable vibration using the same |
| CN110409287A (en) * | 2018-04-26 | 2019-11-05 | 株式会社韩国桥梁 | Symmetrical hydraulic circuit drag-line damping unit and control method comprising spring-damper |
| CN212247828U (en) * | 2020-03-12 | 2020-12-29 | 江苏法尔胜缆索有限公司 | Built-in damping structure of suspension cable |
-
2020
- 2020-03-12 CN CN202010170160.6A patent/CN111364347A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1590649A (en) * | 2003-09-03 | 2005-03-09 | 国际弗里希尼特斯特普公司 | Device for damping of vibrations in cables and method therefor |
| KR100936083B1 (en) * | 2009-05-22 | 2010-01-12 | 케이블텍 주식회사 | Cable damper |
| KR101873363B1 (en) * | 2018-04-26 | 2018-07-03 | 주식회사 한국교량 | Cable damper having magnetic-hydraulic damper of symmetric hydraulic line, and method for controlling cable vibration using the same |
| CN110409287A (en) * | 2018-04-26 | 2019-11-05 | 株式会社韩国桥梁 | Symmetrical hydraulic circuit drag-line damping unit and control method comprising spring-damper |
| CN212247828U (en) * | 2020-03-12 | 2020-12-29 | 江苏法尔胜缆索有限公司 | Built-in damping structure of suspension cable |
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