CN114481830A - Cable isolation vibration damper in cable-stayed-suspended cooperation system - Google Patents
Cable isolation vibration damper in cable-stayed-suspended cooperation system Download PDFInfo
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- CN114481830A CN114481830A CN202210047265.1A CN202210047265A CN114481830A CN 114481830 A CN114481830 A CN 114481830A CN 202210047265 A CN202210047265 A CN 202210047265A CN 114481830 A CN114481830 A CN 114481830A
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- 238000002955 isolation Methods 0.000 title claims abstract description 22
- 239000000725 suspension Substances 0.000 claims abstract description 43
- 238000013016 damping Methods 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a cable isolation and vibration reduction device in a cable-stayed-suspended cable cooperation system, which comprises a first clamp, a second clamp and an elastic connecting piece, wherein the first clamp is arranged on a stay cable at a crossing position, the second clamp is arranged on a sling at the crossing position, the first clamp and the second clamp are connected through the elastic connecting piece, the elastic connecting piece is movably connected with the first clamp and/or the second clamp, and the elastic connecting piece can axially swing relative to the sling or can axially slide relative to the stay cable simultaneously. This application has played the isolation and the damping effect between alternately suspension cable and the hoist cable because elastic connecting element's cushioning effect.
Description
Technical Field
The invention relates to a vibration damper, in particular to an isolation vibration damper for stay cables and suspension cables in a cooperative system bridge.
Background
Although both suspension bridges and cable-stayed bridges are structures with cables as main load-bearing members, the differences between the two are significant. The load acting on the stiffening beam of the cable-stayed bridge is directly transmitted to the stay cable through the anchoring point; the load acting on the stiffening beam of the suspension bridge is transferred to the flexible main cable through the suspension cable anchored on the stiffening beam, and the load is borne by the deformation of the main cable, so that the two have larger difference in structural rigidity. The main cable of the self-anchored suspension bridge is anchored on a huge anchorage, and the stiffening beam does not bear the axial force action transmitted by the main cable; the cable-stayed bridge is generally a self-anchored structure, and a stiffening beam of the cable-stayed bridge bears huge axial pressure transmitted by a stay cable. The rigidity of the cable-stayed bridge depends on the rigidity of a cable system to a great extent, so that the change of the tension force, the quantity and the anchoring interval of the stay cables can not only adjust the internal force borne by the stiffening beam, but also change the rigidity of the whole structure. However, when the span of the cable-stayed bridge exceeds 1000m, the maximum cantilever reaches or exceeds 500m during construction, and the structural stability of the bridge before closure is difficult to ensure due to the large-span cantilever; meanwhile, the axial horizontal pressure in the stiffening beam also increases rapidly along with the increase of the span of the cantilever, so that the root of the stiffening beam generates buckling instability at the position close to the tower. In order to ensure the buckling stability of the stiffening beam, the cross section area of the stiffening beam must be increased, which results in the increase of the self weight of the stiffening beam, the cable force of the stay cable is also increased, and the two influence each other, thereby reducing the efficiency of the stay cable for bearing live load. The height of the pylon (the part above the bridge floor) of the cable-stayed bridge is generally 1/6-1/4 of the span. When the span is increased, the bridge tower is also correspondingly increased, and the high-rise bridge tower brings difficulties in construction and stability problems. In addition, the greater the length of the stay cable of the large-span cable-stayed bridge is, the more obvious the sag effect is, which is another limiting factor influencing the development of the cable-stayed bridge to the large span. The main cable of the suspension bridge is mainly acted by axial force, the utilization rate of the cross section is high, and the suspension bridge has larger spanning capacity compared with a cable-stayed bridge.
The maximum span of the suspension bridge is refreshed continuously, but the maximum span also has a limit value. Because when the span of suspension bridge further increased, the length of main cable will show the increase, and stiffening beam height also can increase, leads to the dead weight of main cable and stiffening beam too big, and the effect of live load in addition must construct very big earth anchor and just can satisfy the requirement of structure atress safety. Therefore, the suspension bridge with the large span is not difficult to design, but is difficult to find out proper geological conditions to build a huge ground anchor system, the structural rigidity is obviously reduced along with the increase of the span of the suspension bridge, and the dynamic stability of the suspension bridge is difficult to ensure when the span is large. To sum up, the existing large-span bridge in the world widely adopts two forms of a cable-stayed bridge and a suspension bridge, but the two have advantages and disadvantages and restrict the further increase of the span. Particularly, with the development of economy and traffic industry worldwide, in order to develop regional economy, more requirements are required for the traffic connection across straits, rivers and regions, and a plurality of large-span bridges need to be built. However, these bridge projects will face the influence of many natural conditions such as deep water foundation, strong typhoon, soft soil foundation, etc., and the need of actual projects can not be satisfied only by using the traditional single cable-stayed bridge or suspension bridge. Therefore, the cable-stayed and suspension cable cooperative system bridge which can overcome the respective defects of the cable-stayed bridge and the suspension bridge and integrates the advantages of the cable-stayed bridge and the suspension bridge is produced, so that the development of the bridge in the aspect of extra-large span becomes possible.
In the current scheme of a cable-stayed bridge cooperation system, a suspension cable system is adopted in the middle of a main span part, two ends of a midspan and an edge span are respectively provided with a cable-stayed part, and a suspender and a stay cable are arranged at the intersection of the suspension cable part and the cable-stayed part in a mutually crossed mode. As shown in fig. 1.
Compared with a suspension bridge, the cable-stayed suspension cable cooperation system has the following advantages: (1) the cable-stayed-suspension cable cooperation system can be flexibly arranged in combination with the terrain, and the influence limit of site terrain and geological conditions is small; (2) the load of the cable-stayed bridge part in the cooperation system is transferred to the bridge tower and then transferred to the foundation through the stay cable, and the load is transferred to the foundation through two main cables in the suspension bridge, so that the tension born by the main cables in the cooperation system can be greatly reduced; (3) the rigidity of the cable-stayed bridge is higher than that of the suspension bridge, so that the mid-span temperature deflection and live load deflection of the cooperative system bridge are both smaller than those of the suspension bridge; (4) because the cable-stayed bridge has higher wind resistance stability, the first-order torsion frequency of the cooperative system bridge is larger than that of the suspension bridge, and the wind resistance of the cooperative system can be obviously improved. Compared with a cable-stayed bridge, the cable-stayed suspension cable cooperation system bridge has the following advantages: (1) due to the participation of the suspension cables, the over-inclined and overlong stay cables can be omitted from the midspan part, so that not only is the steel saved and the manufacturing cost reduced, but also the nonlinear effect influence caused by overlong stay cables is reduced; (2) the height of the main tower can be reduced, and the overall shock resistance, wind resistance and other capabilities of the bridge are improved; (3) the length of the beam of the inclined pulling part is reduced, namely, the length of a cantilever in the construction process is reduced, so that the wind resistance stability in the construction process is greatly improved. (4) The cable-stayed bridge is partially shortened, so that the axial pressure born by the root of the stiffening girder close to the tower is obviously reduced, and the overall stability of the stiffening girder is improved.
Although cooperative system bridges have numerous advantages over traditional cable system bridges, the cable-stayed and suspended cooperative system bridges also have the following problems: because the stayed-cable-suspended-cable cooperative system bridge is arranged at the junction of the end stayed-cable and the end suspender, the end suspender often generates larger axial force amplitude due to the sudden change of the rigidity of the 2-body system, so that the fatigue problem of the end suspender is caused. The cross arrangement of the stay cables and the suspension cables can cause the bridge of a cooperative system to have the problems of mutual collision, interference and the like of the stay cables and the suspension cables at the cross position due to cable vibration and the like during operation, and the safety and the durability of the structure are influenced. Therefore, it is necessary to solve the problem of interference between the stay cable and the sling at the crossing position.
Disclosure of Invention
The invention provides an isolation vibration damping device, aiming at solving the problem of interference of a stay cable and a sling at a cross position in a bridge of a cooperative system.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a vibration damper is kept apart to cable among cable-stay-span wire cooperative system, includes first anchor clamps, second anchor clamps and elastic connecting piece, first anchor clamps set up on the suspension cable of cross location, the second anchor clamps set up on the hoist cable of cross location, first anchor clamps with the second anchor clamps pass through elastic connecting piece connects, elastic connecting piece with first anchor clamps and or second anchor clamps swing joint, and elastic connecting piece can be relative hoist cable axial swing, perhaps can also be relative suspension cable axial slip simultaneously.
As one embodiment of the present application, the second clamp is hinged to a connection end of the elastic connection member to implement a function that the elastic connection member can swing axially relative to the sling.
As one of the implementation modes of the application, the first clamp is provided with a moving hole along the cable direction, and the other connecting end of the elastic connecting piece is arranged in the moving hole and can freely slide along the moving hole in a reciprocating mode so as to realize that the elastic connecting piece can slide along the axial direction of the stay cable relatively.
As one of the embodiments of this application, elastic connection spare includes support, tensile pole, spring, backing plate, the support with the second anchor clamps are articulated, the activity of tensile pole is worn on the support, the spring housing is in on the tensile pole, the backing plate locking is located at tensile pole the inside one end of support, the one end of spring with the backing plate inconsistent the other end with the support is inconsistent, and tensile pole exposes outside the support one end with first anchor clamps are connected.
As one of the implementation modes of the application, the elastic connecting piece further comprises a rubber pad, the rubber pad is arranged on the support, and the other end of the spring directly abuts against the rubber pad, so that the high-frequency structure-borne sound waves received by the spring are reflected and attenuated.
Furthermore, in order to protect the rubber pad, a metal gasket is laid on the surface of the rubber pad, and the other end of the spring directly abuts against the metal gasket.
Furthermore, the first clamp is provided with a moving hole along the cable direction, and one end of the stretching rod, which is exposed out of the support, is locked in the moving hole through a nut and can freely slide along the moving hole in a reciprocating manner.
As one of the implementation modes of the application, the first clamp and the second clamp respectively comprise a U-shaped clamping plate and a cover plate, and the cover plate is arranged on an opening of the U-shaped clamping plate.
According to one embodiment of the application, a rubber gasket with the thickness of 2-3 mm is arranged in a channel formed by combining the U-shaped clamping plate and the cover plate, so that a polyethylene sheath on the surface of a stay cable or a sling is prevented from being damaged.
Compared with the prior art, the invention has the advantages that:
the elastic connecting piece can be regarded as a spring damper, the axial stiffness of the elastic connecting piece is determined by the compression amount of a spring, and the larger the compression amount of the spring is, the smaller the stiffness of the damper is; the smaller the spring compression, the greater the damper stiffness. There are many irreplaceable advantages over other vibration isolation elements, such as: the deformation curve is good in linearity, and the design calculation is accurate; the dynamic stiffness is the same as the static stiffness; has three-dimensional rigidity; high elasticity, i.e., high vibration isolation efficiency; no extra power is needed; long service life, no need of maintenance and the like.
One end of the elastic connecting piece is connected with the sling clamp (the second clamp), and the other end is connected with the stay cable clamp (the first clamp). When both ends of the spring in the system are displaced, the direction of the spring force is opposite to the positive direction of the established number axis; when only one end of the spring is displaced, the direction of the spring force is opposite to the actual displacement direction of the end point of the spring. When the stay cable or the sling vibrates, vibration force acts on the spring, and on one hand, the vibration force can accelerate the spring and on the other hand can elastically deform the spring to form solid sound waves. Because the first anchor clamps on the fixed suspension cable of one end of spring, because the cushioning effect of spring, lead to transmitting the power on the hoist cable anchor clamps will greatly reduced, played the isolation and the damping effect between alternately suspension cable and the hoist cable.
Drawings
FIG. 1 is a schematic structural view of a cable-stayed/suspension cable cooperative bridge system;
FIG. 2 is a perspective view of the isolation damping device for stay cable and sling according to the present application;
FIG. 3 is a schematic structural diagram of an elastic connecting member according to an embodiment of the present application;
fig. 4 is a schematic structural view of a first clamp/stay cable clamp according to the present application;
fig. 5 is a schematic view of a second clamp/sling clamp of the present application.
Detailed Description
The present invention will be described in further detail below with reference to the attached drawings, which are illustrative and are not to be construed as limiting the invention. The description of the present embodiment is corresponding to the accompanying drawings, and the description related to the orientation is also based on the description of the accompanying drawings, and should not be construed as limiting the scope of the present invention.
As shown in fig. 1, the cable isolation and vibration damping device in this embodiment is used to achieve isolation and vibration damping between the crossing stay cables and suspension cables in the cable-stayed-suspension system. The device consists of a stay cable clamp, a sling cable clamp and an elastic connecting piece. The elastic connecting piece comprises a damping spring 1, a stretching rod 2, a stretching rod nut 3, a backing plate 4, a rubber pad 5, a support 6, a connecting lug plate 7 on the support and the like. The connecting lug plate 7 on the bracket 6 is used for being hinged with a sling clamp, so that the rotation of a small corner can be realized. The stretching rod 2 movably penetrates through the support 6, the damping spring 1 is sleeved on the stretching rod 2, the backing plate 4 is locked at one end, located inside the support, of the stretching rod 2, an axial gap is reserved between the end portion of the stretching rod 2 and the support 6, the damping spring 1 is also located inside the support 6, one end of the damping spring is abutted to the backing plate 4, and the other end of the damping spring is indirectly abutted to the support 6 through the rubber pad 5. The rubber pads 5 connected in series enable high-frequency solid acoustic waves to be reflected and attenuated. One end of the stretching rod 2 exposed out of the bracket 6 is connected with the stay cable clamp through a stretching rod nut 3. The stay cable clamp is provided with a waist-shaped moving hole A along the cable direction, and one end of the stretching rod 2 exposed out of the bracket 6 is locked in the moving hole A through a stretching rod nut 3, so that the stay cable clamp can adapt to the movement of 200 mm-600 mm along the cable direction.
The stay cable clamp and the second stay cable clamp respectively comprise a U-shaped clamp plate 8 and a cover plate 9, and the cover plate 9 is arranged on an opening of the U-shaped clamp plate 8. And a rubber gasket 10 with the thickness of 2-3 mm is arranged in a channel formed by the U-shaped clamping plate 8 and the cover plate 9 after being closed, and is used for protecting a polyethylene sheath of a stay cable or a sling.
The elastic connecting piece can be regarded as a high damping spring shock absorber, one end of the elastic connecting piece is connected with the sling clamp, and the other end of the elastic connecting piece is connected with the stay cable connecting clamp. When both ends of the spring in the system are displaced, the direction of the spring force is opposite to the positive direction of the established number axis; when only one end of the spring is displaced, the direction of the spring force is opposite to the actual displacement direction of the end point of the spring. When the stay cable or the sling vibrates, vibration force acts on the elastic connecting piece, and on one hand, the vibration force can accelerate the spring and on the other hand can elastically deform the spring to form solid sound waves. Because the one end of elastic connecting piece is anchor clamps on the fixed connection suspension cable, because the cushioning effect of spring leads to the power greatly reduced that transmits to the hoist cable anchor clamps, has played the isolation and the damping effect between intercrossing suspension cable and the hoist cable.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a cable isolation damping device in cable-stay-suspension cable cooperative system which characterized in that: including first anchor clamps, second anchor clamps and elastic connecting piece, first anchor clamps set up on cross position's suspension cable, the second anchor clamps set up on cross position's hoist cable, first anchor clamps with the second anchor clamps pass through elastic connecting piece connects, elastic connecting piece with first anchor clamps andor second anchor clamps swing joint, and elastic connecting piece can be relative hoist cable axial swing, perhaps can also be relative suspension cable axial slip simultaneously.
2. The isolation vibration isolator as in claim 1, wherein: the second clamp is hinged with one connecting end of the elastic connecting piece.
3. The isolation vibration isolator as in claim 1, wherein: the first clamp is provided with a moving hole along the cable direction, and the other connecting end of the elastic connecting piece is arranged in the moving hole and can freely slide along the moving hole in a reciprocating mode.
4. The isolation vibration isolator as in claim 1, wherein: the elastic connecting piece comprises a support, a stretching rod, a spring and a base plate, the support is hinged to the second clamp, the stretching rod is movably penetrated on the support, the spring is sleeved on the stretching rod, the base plate is locked at one end of the stretching rod, located at the inner part of the support, one end of the spring is abutted to the other end of the base plate, abutted to the support, and one end, exposed out of the support, of the stretching rod is connected with the first clamp.
5. The isolation vibration damping device according to claim 4, wherein: the elastic connecting piece further comprises a rubber pad, the rubber pad is arranged on the support, and the other end of the spring directly abuts against the rubber pad.
6. The isolation vibration isolator as claimed in claim 4, wherein: a metal gasket is laid on the surface of the rubber gasket, and the other end of the spring directly abuts against the metal gasket.
7. The isolation vibration isolator as claimed in claim 4, wherein: the first clamp is provided with a moving hole along the cable direction, and one end of the stretching rod, which is exposed out of the support, is locked in the moving hole through a nut and can freely slide along the moving hole in a reciprocating mode.
8. The isolation vibration isolator as in claim 1, wherein: the first clamp and the second clamp respectively comprise a U-shaped clamping plate and a cover plate, and the cover plate is arranged on an opening of the U-shaped clamping plate.
9. The isolation vibration isolator as claimed in claim 8, wherein: and a rubber gasket with the thickness of 2-3 mm is arranged in the channel formed by the U-shaped clamping plate and the cover plate after being closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047265.1A CN114481830B (en) | 2022-01-17 | 2022-01-17 | Cable isolation vibration damper in cable-stayed-suspension cooperative system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047265.1A CN114481830B (en) | 2022-01-17 | 2022-01-17 | Cable isolation vibration damper in cable-stayed-suspension cooperative system |
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| CN114481830A true CN114481830A (en) | 2022-05-13 |
| CN114481830B CN114481830B (en) | 2024-06-25 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000290929A (en) * | 1999-04-12 | 2000-10-17 | Tokyo Fabric Kogyo Kk | Horizontal force dispersing device with anchor bar |
| CN103032504A (en) * | 2013-01-11 | 2013-04-10 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Inverted double-out-rod stay cable oil damper based on thin-wall small hole throttling |
| CN109989345A (en) * | 2019-03-26 | 2019-07-09 | 江苏法尔胜缆索有限公司 | A kind of dynamic mount of bridge sling |
| CN111236038A (en) * | 2020-03-09 | 2020-06-05 | 东南大学 | Novel suspension bridge central authorities detain device |
| CN211079878U (en) * | 2019-08-23 | 2020-07-24 | 中铁第四勘察设计院集团有限公司 | Suspension bridge structure |
| WO2020151617A1 (en) * | 2019-01-25 | 2020-07-30 | 石家庄铁道大学 | Negative rigidity shock reduction and isolation device for continuous beam |
| CN211522885U (en) * | 2019-12-30 | 2020-09-18 | 中国铁建投资集团有限公司 | Temporary stay cable vibration damper for self-anchored suspension bridge |
| CN113445412A (en) * | 2021-07-26 | 2021-09-28 | 中铁桥研科技有限公司 | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge |
-
2022
- 2022-01-17 CN CN202210047265.1A patent/CN114481830B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000290929A (en) * | 1999-04-12 | 2000-10-17 | Tokyo Fabric Kogyo Kk | Horizontal force dispersing device with anchor bar |
| CN103032504A (en) * | 2013-01-11 | 2013-04-10 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Inverted double-out-rod stay cable oil damper based on thin-wall small hole throttling |
| WO2020151617A1 (en) * | 2019-01-25 | 2020-07-30 | 石家庄铁道大学 | Negative rigidity shock reduction and isolation device for continuous beam |
| CN109989345A (en) * | 2019-03-26 | 2019-07-09 | 江苏法尔胜缆索有限公司 | A kind of dynamic mount of bridge sling |
| CN211079878U (en) * | 2019-08-23 | 2020-07-24 | 中铁第四勘察设计院集团有限公司 | Suspension bridge structure |
| CN211522885U (en) * | 2019-12-30 | 2020-09-18 | 中国铁建投资集团有限公司 | Temporary stay cable vibration damper for self-anchored suspension bridge |
| CN111236038A (en) * | 2020-03-09 | 2020-06-05 | 东南大学 | Novel suspension bridge central authorities detain device |
| CN113445412A (en) * | 2021-07-26 | 2021-09-28 | 中铁桥研科技有限公司 | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge |
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| CN114481830B (en) | 2024-06-25 |
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