Ultra-long cable damping device and cable-stayed bridge

Abstract

The present application relates to an ultra-long cable-stayed cable damping device and a cable-stayed bridge, which includes: a cableway tube, which is fixedly mounted on the bridge body; at least two dampers, with the two ends of the damper respectively connected to the cableway tube and the cable-stayed cable, and both dampers are arranged along the radial direction of the cable-stayed cable; a connecting support, which is fixedly connected to the cableway tube and the number of which corresponds to the dampers, and the dampers are connected to the cableway tube by connecting to the connecting support. The two dampers connect the cableway tube and the cable-stayed cable in the vertical installation plane of the cable-stayed cable and in two directions perpendicular to the vertical installation plane of the cable-stayed cable, respectively, so that they can effectively reduce the in-plane and out-of-plane vibrations of the cable-stayed cable. A set of the above-mentioned ultra-long cable damping device is installed on the inner tower and outer tower wall of the main tower of the cable-stayed bridge. Through the coordinated work of the two, the low, medium and high-order wind-induced vibrations of the ultra-long cable can be controlled, ensuring the normal use of the cable-stayed cable on the bridge body. In addition, the damping devices on the inner tower and outer tower wall are both installed inside the main tower, without affecting the bridge landscape.

Description

Technical Field

[0001] The present application relates to the technical field of cable-stayed bridge structures, and in particular to an ultra-long cable damping device and a cable-stayed bridge. Background Art

[0002] With the continuous advancement of bridge design and construction technology, the spans of cable-stayed bridges have continued to increase, leading to ever-increasing cable lengths and flexibility. These long and flexible cables are also highly susceptible to significant vibration under environmental loads such as wind and rain. The use of external dampers to control cable vibration has become widely accepted in the engineering community.

[0003] Traditional external dampers for stay cables are typically installed between the cable and the main beam via connecting rods. This requires the installation of embedded plates on the main beam. These plates often interfere with auxiliary equipment on the main beam, such as drainage systems and streetlights. Therefore, the use of cable ducts to install dampers has attracted widespread attention from designers.

[0004] In the related art, there is a built-in damping and vibration reduction device for inclined cables, which uses a cableway tube as a support frame and symmetrically installs two sets of inclined cable dampers in parallel. The four hinge points of the two sets of dampers are arranged in a parallelogram, which can control the in-plane vibration of the cable. It is worth considering that when the cable vibrates out-of-plane, the damper rotates as a whole, and the lateral displacement obtained by the damper is small, which cannot play an out-of-plane vibration reduction role. Summary of the Invention

[0005] The embodiments of the present application provide an ultra-long cable damping device and a cable-stayed bridge to solve the problem in the related art that the damper cannot effectively control the out-of-plane vibration of the cable.

[0006] In a first aspect, an ultra-long stayed cable damping device is provided.

[0007] An ultra-long stayed cable damping device, comprising:

[0008] A cableway tube, which is used to fix the bridge body, and one end of the inclined cable extends into the cableway tube and is anchored on the bridge body;

[0009] At least two dampers, each end of which is connected to the cableway tube and the stay cable, respectively. Both dampers are arranged radially along the stay cable, and one of the dampers is located within the vertical installation plane of the stay cable on the bridge body, while the other damper is perpendicular to the vertical installation plane of the stay cable.

[0010] The connecting supports are fixedly connected to the cableway tube and the number thereof corresponds to the dampers. The dampers are connected to the cableway tube by connecting to the connecting supports, and the connection points between the dampers and the connecting supports are located outside the circumference of the cableway tube.

[0011] In some embodiments, a mounting plate is fixedly connected to the top of the cableway tube, and the mounting plate is axially aligned with the cableway tube, and its circumferential diameter is larger than the cableway tube, and the connecting support is detachably connected to the mounting plate extending outside the cableway tube.

[0012] In some embodiments, the mounting plate extending outside the cableway tube is provided with multiple groups of mounting holes, and adjacent mounting hole groups are arranged orthogonally. The mounting hole groups include multiple mounting hole positions, and the connecting support is provided with bolt holes corresponding to the mounting hole positions. The connecting support is fixedly connected to the connecting support by multiple fastening bolts.

[0013] In some embodiments, a connecting end is provided at one end of the connecting support, and the connecting end extends to the side of the mounting plate opposite to the cableway tube, and a supporting ear plate for connecting the damper is provided on the connecting end, and the end of the damper is rotatably connected to the supporting ear plate.

[0014] In some embodiments, the bottom surface of the mounting plate is provided with a third stiffening rib perpendicular to the mounting plate, the third stiffening rib is parallel to the radial direction corresponding to it on the mounting plate, and a U-shaped groove corresponding to the third stiffening rib is provided at the bottom of the connecting support, the third stiffening rib is in contact with the connecting support in the U-shaped groove, and connects the mounting plate, the cableway tube and the bridge body.

[0015] In some embodiments, four third stiffening ribs are provided on the bottom surface of the mounting plate, and the four third stiffening ribs are orthogonally distributed on the bottom surface of the mounting plate, wherein two of the third stiffening ribs are located in the mounting vertical surface.

[0016] In some embodiments, the damper is connected to the stay cable via a cable clamp mounted on the stay cable, wherein the cable clamp is provided with an ear plate corresponding to the damper and enables the cable clamp to be rotatably connected to the end of the damper.

[0017] In a second aspect, a cable-stayed bridge is provided.

[0018] A cable-stayed bridge comprises a stay cable and the ultra-long stay cable damping device as described above.

[0019] In some embodiments, the present invention further comprises:

[0020] The main tower comprises an inner tower and an outer tower wall spaced apart and sleeved outside the circumference of the inner tower;

[0021] main beam;

[0022] The inclined cable passes through the outer tower wall and is respectively connected to the main beam and the inner tower at both ends, and at least two extra-long inclined cable damping devices are provided. The two extra-long inclined cable damping devices are respectively connected to the inner tower and the outer tower wall to connect the inclined cable from two positions.

[0023] In some embodiments, the connection positions between the two ultra-long stayed cable damping devices and the stayed cable are obtained according to the position of the outer tower wall, the position of the inner tower, and the control requirements of the wind-induced vibration order of the stayed cable.

[0024] The beneficial effects of the technical solution provided by this application include:

[0025] (1) The damper in the ultra-long cable damping device is arranged vertically, so that it can effectively control the in-plane and out-of-plane vibrations of the cable. At the same time, one end of the damper is set outside the cableway tube through a connecting support, ensuring that there is sufficient vibration reduction stroke between the damper and the cable.

[0026] (2) The damping device installed on the outer tower wall mainly controls the low- and medium-order vibrations of the ultra-long inclined cables, and the damping device installed on the inner tower mainly controls the medium- and high-order vibrations of the ultra-long inclined cables. The synergistic effect of the two can effectively control the low-, medium- and high-order vibrations of the ultra-long inclined cables.

[0027] (3) The damping devices installed on the outer tower wall and the inner tower are both arranged inside the main tower. Compared with the beam end damping devices installed at a relatively large position in the prior art, the two damping devices in this application have a large supporting stiffness. At the same time, the damping devices installed inside the main tower have no impact on the bridge landscape. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the overall structure of the ultra-long stayed cable damping device provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the connecting support structure provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the installation position of the ultra-long stay cable damping device provided in an embodiment of the present application on a cable-stayed bridge;

[0032] Figure 4 Schematic diagram of the vibration reduction effect of the ultra-long stayed cable damping device connected to the outer tower wall;

[0033] Figure 5 Schematic diagram of the vibration reduction effect of the ultra-long stay cable damping device connected to the inner tower;

[0034] Figure 6 Schematic diagram of the coordinated vibration reduction effect of the two damping devices.

[0035] In the picture:

[0036] 1. Cableway tube; 10. Mounting plate; 100. Mounting hole group; 101. Fastening bolt; 102. Third stiffening rib;

[0037] 2. Damper;

[0038] 3. Connecting support; 30. First stiffening rib; 31. Connecting end; 32. Support lug; 33. Second stiffening rib; 34. U-shaped groove; 35. Cable clamp; 36. Bolt hole position;

[0039] 4. Stay cables;

[0040] 5. Main tower; 50. Inner tower; 51. Outer tower wall;

[0041] 6. Main beam;

[0042] 7. Extra-long stay cable damping device. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The embodiments of the present application provide an ultra-long cable damping device and a cable-stayed bridge, which solve the problem in the related art that the damper cannot effectively control the out-of-plane vibration of the cable.

[0045] Reference Figure 1 , an ultra-long stayed cable damping device, comprising:

[0046] A cableway tube 1 is used to fix the bridge body, and one end of the inclined cable 4 extends into the cableway tube 1 and is anchored on the bridge body;

[0047] At least two dampers 2, each end of which is connected to the cableway tube 1 and the stay cable 4, respectively. Both dampers 2 are arranged radially along the stay cable 4, and one of the dampers 2 is located within the vertical installation plane of the stay cable 4 on the bridge body, while the other damper 2 is perpendicular to the vertical installation plane of the stay cable 4.

[0048] The connecting supports 3 are fixedly connected to the cableway tube 1 and the number thereof corresponds to the dampers 2. The dampers 2 are connected to the cableway tube 1 by connecting to the connecting supports 3, and the connection points between the dampers 2 and the connecting supports 3 are located outside the circumference of the cableway tube 1.

[0049] Specifically, the damper 2 used in this embodiment may preferably be a viscous damper.

[0050] With this arrangement, since the two dampers 2 connect the cableway tube 1 and the cable 4 in the vertical installation plane of the cable 4 and in two directions perpendicular to the vertical installation plane of the cable 4, respectively, the two dampers 2 can effectively reduce the in-plane and out-of-plane vibrations of the cable 4 when the cable 4 vibrates, thereby achieving more stable installation and use of the cable 4 on the bridge body. At the same time, since one end of the damper 2 is arranged on the outside of the cableway tube 1 through the connecting support 3, it is guaranteed that there is a sufficient vibration reduction stroke between the damper 2 and the cable 4, thereby effectively improving the energy consumption and vibration reduction effect of the damper 2 when the cable 4 vibrates.

[0051] Reference Figure 1 Optionally, a mounting plate 10 is fixedly connected to the top of the cableway tube 1, and the mounting plate 10 is axially consistent with the cableway tube 1, and its circumferential diameter is larger than the cableway tube 1, and the connecting support 3 is detachably connected to the mounting plate 10 extending outside the cableway tube 1.

[0052] In this embodiment, the mounting plate 10 is welded to the top of the cableway tube 1. Its annular structure conforms to the cableway tube 1, allowing the stay cables 4 to be smoothly installed within the cableway tube 1. The mounting plate 10 also has a larger circumferential diameter than the cableway tube 1, allowing the subsequent connecting support 3 to be smoothly distanced from the cableway tube 1, ensuring that the subsequent damper 2 has sufficient vibration damping travel when connected between the connecting support 3 and the stay cables 4.

[0053] Reference Figure 1Optionally, the mounting plate 10 extending outside the cableway tube 1 is provided with a plurality of mounting hole groups 100, and adjacent mounting hole groups 100 are arranged orthogonally. The mounting hole group 100 includes a plurality of mounting hole positions, and the plurality of mounting holes are arranged at equal intervals along the radial direction of the mounting plate 10. Bolt hole positions 36 corresponding to the mounting hole positions are provided on the connecting support 3, and the connecting support 3 is fixedly connected to the connecting support 3 by a plurality of fastening bolts 101.

[0054] In this embodiment, four mounting hole groups 100 are specifically provided and arranged orthogonally on the mounting plate 10, so that this solution can install multiple connecting brackets 3 when needed. The mounting hole groups 100 include multiple mounting holes, which are arranged in two rows on the mounting plate 10. The two rows of mounting holes are parallel and extend radially along the mounting plate 10 at their midpoint. The spacing between the mounting holes is uniform.

[0055] This arrangement enables a detachable fixed connection between the connecting support 3 and the mounting plate 10 via the fastening bolts 101. Furthermore, when using dampers 2 of different lengths, the connecting support 3 can be fixed in a different position on the mounting plate 10 by connecting the fastening bolts 101 to different mounting holes. This allows the distance between the connecting support 3 and the stay cable 4 to be changed to accommodate dampers 2 of varying lengths.

[0056] Reference Figure 1 and Figure 2 Optionally, the connecting support 3 is arranged on the side of the mounting plate 10 close to the bridge body surface and abuts against the mounting plate 10, and the side of the connecting support 3 away from the mounting plate 10 is provided with a first stiffening rib 30 perpendicular to the mounting plate 10.

[0057] With this arrangement, the first stiffening rib 30 can effectively ensure the bending resistance of the connecting support 3, thereby ensuring that the damper 2 connected to the connecting support 3 can be used stably.

[0058] Optionally, a connecting end 31 is provided at one end of the connecting support 3, and the connecting end 31 extends to the side of the mounting plate 10 opposite to the cableway tube 1, and a supporting ear plate 32 for connecting the damper 2 is provided on the connecting end 31, and the end of the damper 2 is rotatably connected to the supporting ear plate 32.

[0059] With this arrangement, the damper 2 can smoothly connect the inclined cable 4 and the connecting support 3 on one side of the mounting plate 10 in a direction parallel to the radial direction of the inclined cable 4, and at the same time be rotatably connected to the connecting end 31 of the connecting support 3 through the supporting ear plate 32. Therefore, the damper 2 can rotate around the supporting ear plate 32 when the inclined cable 4 vibrates, so as to smoothly absorb and reduce the in-plane and out-of-plane vibrations of the inclined cable 4.

[0060] Reference Figure 1 and Figure 2 Optionally, a second stiffening rib 33 parallel to the damper 2 is provided at the corner between the connecting end 31 and the connecting support 3 .

[0061] With this arrangement, the second stiffening rib 33 effectively increases the bending resistance of the connection end 31 at the end of the connection support 3, so that the connection end 31 and the connection support 3 can be more stable when the damper 2 moves and contracts.

[0062] Optionally, a plurality of the second stiffening ribs 33 are provided on the connecting support 3 , and the plurality of the second stiffening ribs 33 are parallel to and spaced apart from each other.

[0063] This arrangement further improves the structural stability of the connecting end 31 on the connecting support 3, ensuring smooth and stable use of the entire structure.

[0064] Reference Figure 1 and Figure 2 Optionally, the bottom surface of the mounting plate 10 is provided with a third stiffening rib 102 perpendicular to the mounting plate 10, and the third stiffening rib 102 is parallel to the radial direction corresponding to the mounting plate 10, and the bottom of the connecting support 3 is provided with a U-shaped groove 34 corresponding to the third stiffening rib 102, and the third stiffening rib 102 is in contact with the connecting support 3 in the U-shaped groove 34, and connects the mounting plate 10, the cableway tube 1 and the bridge body.

[0065] Among them, two first stiffening ribs 30 are parallel to and spaced apart from each other on the bottom surface of the connecting support 3, a U-shaped groove 34 is provided between the two first stiffening ribs 30, and the third stiffening rib 102 is welded in the U-shaped groove 34 and abuts against the connecting support 3. Finally, the mounting plate 10, the cableway tube 1 and the bridge surface are connected together through the third stiffening rib 102.

[0066] Reference Figure 1 Optionally, four third stiffening ribs 102 are provided on the bottom surface of the mounting plate 10, and the four third stiffening ribs 102 are orthogonally distributed on the bottom surface of the mounting plate 10, wherein two of the third stiffening ribs 102 are located in the mounting vertical surface.

[0067] This arrangement further enhances the rigidity of the mounting plate 10, ensuring greater stability of the overall structure during use. Furthermore, two third stiffening ribs 102 are located within the vertical plane of the bridge installation. That is, the remaining two third stiffening ribs 102 are perpendicular to the vertical plane of the bridge installation. Consequently, the four third stiffening ribs 102 further directly enhance the stability of the overall structure in both the vertical and horizontal directions, ensuring that the overall structure effectively reduces vibrations of the stay cables 4 during use.

[0068] Optionally, the damper 2 is connected to the inclined cable 4 via a cable clamp 35 mounted on the inclined cable 4. The cable clamp 35 is provided with an ear plate corresponding to the damper 2 and enables the cable clamp 35 to be rotatably connected to the end of the damper 2.

[0069] This arrangement realizes the rotational connection between the oblique cable 4 and the damper 2, and further, when the oblique cable 4 vibrates, the plurality of dampers 2 can smoothly move in conjunction with the vibration.

[0070] In a second aspect, the present application provides a cable-stayed bridge.

[0071] Reference Figure 3 A cable-stayed bridge includes a cable 4 and the ultra-long cable damping device 7 as described above. It can be understood that the cable 4 is connected to the cable damping device 7 through the cable 4 to achieve vibration reduction of the cable 4.

[0072] Furthermore, with advancements in construction technology, the spans of cable-stayed bridges have continued to increase, and the length of the cables, the primary load-bearing components, has also increased. To accommodate these increasing spans, engineers have developed a steel box-core concrete composite cable tower. This main tower primarily consists of a core concrete, a steel anchor box, shear studs, and a peripheral steel box. The core concrete is positioned at the neutral axis of the cross-section, primarily to withstand the axial pressure of the upper tower column, while the peripheral steel box structure withstands bending moments. This composite structure fully utilizes the mechanical properties of steel and concrete, offering high cable force resistance, a clear force transmission path, and a balanced load distribution. Compared to conventional cable-stayed bridges, cable-stayed bridges employing this new main tower have greater spanning capacity, which in turn requires longer cables suitable for this type of main tower structure. As the cable length increases, the low-, medium-, and high-order vibrations they face become increasingly prominent.

[0073] Based on the above problems, the present application further provides some preferred embodiments. In these preferred embodiments, the cable-stayed bridge further includes:

[0074] The main tower 5 comprises an inner tower 50 and an outer tower wall 51 spaced apart and sleeved outside the circumference of the inner tower 50;

[0075] Main beam 6;

[0076] The inclined cable 4 passes through the outer tower wall 51 and is connected to the main beam 6 and the inner tower 50 at both ends, and the ultra-long inclined cable damping device 7 is provided with at least two.

[0077] The super-long stayed cable damping device 7 is connected to the inner tower 50 and the outer tower wall 510 respectively, so as to connect the stayed cable 4 from two positions.

[0078] The main tower 5 of the cable-stayed bridge provided in this application includes an outer tower wall 51 and an inner tower 50. The outer tower wall 51 is a steel box wall in this embodiment, and the inner tower 50 is a concrete core made of concrete. One end of the inclined cable 4 is anchored to the main beam 6 through an anchor plate.

[0079] At the same time, the other end is anchored on the concrete core serving as the inner tower 50. At the same time, the cable 5 4 passes through the outer tower wall 51. At this time, the outer tower wall 51 can provide a basis for installing a damping device on the middle part of the cable 4 that is not involved in conventional cable-stayed bridges. Furthermore, the ultra-long cable damping device 7 provided on the outer tower wall 51 and the inner tower 50 can perform dual coordinated vibration control on the cable 4, especially the ultra-long cable 4 on the long-span cable-stayed bridge in this embodiment.

[0080] The stability of the super-long cable-stayed bridge 4 in this type of long-span cable-stayed bridge is greatly improved. Specifically, since the installation position of the super-long cable damping device 7 connected to the outer tower wall 51 is large, it can mainly control the low- and medium-order vibrations of the super-long cable-stayed cable 4; the installation position of the super-long cable damping device 7 connected to the tower wall of the inner tower 50 is small, it can mainly control the medium- and high-order vibrations of the super-long cable-stayed cable 4. At the same time, since the four dampers 2 in the two super-long cable damping devices 7 are respectively located in the bridge body

[0081] In the vertical and horizontal installation planes, the in-plane and out-of-plane vibrations of the oblique-stayed cables 4 can be more efficiently controlled. Furthermore, for the extra-long oblique-stayed cables 4 in this embodiment, the vibration reduction control effect achieved is also unattainable by the damping devices in the prior art, further ensuring that the two extra-long oblique-stayed cable damping devices 7 have sufficient vibration reduction effect when facing the vibration reduction control of the extra-long oblique-stayed cables 4, so as to ensure the stability of the extra-long oblique-stayed cables 4.

[0082] This arrangement controls the mid- and high-order vibrations of the cables 4 by installing an extra-long cable damping device 7 on the inner tower 50, and controls the low- and mid-order vibrations of the cables 4 by installing an extra-long cable damping device 7 on the outer tower wall 51. Through the synergistic effect of these two devices, full modal vibration control of the low-, mid-, and high-order vibrations of the extra-long cables 4 is achieved. Furthermore, both extra-long cable damping devices 7 are installed inside the main tower 5, minimizing the impact on the bridge structure's aesthetics.

[0083] Furthermore, in order to ensure that the two extra-long cable damping devices 7 have a good vibration control effect on the cable, the connection positions between the two extra-long cable damping devices 7 and the cable 4 are determined based on the position of the outer tower wall 51, the position of the inner tower 50, and the wind-induced vibration order control requirements of the cable 4.

[0084] The wind-induced vibration order control requirements for the stay cables 4 are determined by technicians based on actual bridge requirements and will not be elaborated here. After obtaining the connection positions of the two extra-long stay cable damping devices, the axial lengths of the cableway tubes 1 in the extra-long stay cable damping devices 7 on the outer tower wall 51 and the extra-long stay cable damping devices 7 on the inner tower 50 can be calculated, and then the extra-long stay cable damping devices 7 that meet the installation requirements can be processed. Ultimately, after installation, the extra-long stay cable damping devices 7 are connected to the stay cables 4 at the calculated connection positions.

[0085] For example, the bridge is a cable-stayed bridge with a main span of 1,050 meters. The main beam 6 is a dual-purpose steel truss for road and rail transport, and the upper column of the main tower 5 utilizes a steel box-core concrete composite cable-to-tower anchor structure. The longest cable 4 used is 620 meters long. The cable 4 is anchored at the end of the main beam using an anchor plate. At the end of the main tower, the cable 4 is anchored to the core concrete tower wall. The steel box, which forms the outer tower wall 51, has a 1.50% cable 4 installation ratio, while the core concrete tower wall, which forms the inner tower 50, has a 0.70% cable 4 installation ratio. When the above scheme is used to perform coordinated vibration reduction of the inclined cable 4, first, according to the requirements of the bridge, it is determined that the longest inclined cable 4 needs to control the wind-induced vibration of (1 to 60) orders. The vibration reduction target of the inclined cable 4 is: the vibration modal frequency below 3 Hz, that is, the design logarithmic attenuation rate of the (1-13) order should reach more than 3.0%, and the vibration modal frequency above 3 Hz, that is, the design logarithmic attenuation rate of the (14-60) order and above should reach more than 1.5%; then, it is calculated that the main control order of the inclined cable 4 by the damping device 7 of the inclined cable 4 connected to the outer tower wall 51 is (1 to 40) orders. , the corresponding installation position ratio is 1.45%, the main control order number of the extra-long cable damping device 7 connected to the inner tower 50 on the cable 4 is (30-60), and the corresponding installation position ratio is 0.75%, that is, the connection position of the two extra-long cable damping devices 7 with the cable 4; finally, according to the cable installation position ratio corresponding to the two extra-long cable damping devices 7, the length of the cableway tube 1 in the extra-long cable damping device 7 is adjusted, and finally, after the two extra-long cable damping devices 7 are installed on the outer tower wall 51 and the inner tower 50 respectively, the installation position ratio of the connection with the cable 4 meets the calculation requirements.

[0086] In the above embodiment, after the two super-long cable damping devices 7 are installed and connected according to the above requirements, the vibration reduction effect of the super-long cable damping device 7 connected to the outer tower wall 51 is shown as follows: Figure 4 As shown, the vibration reduction effect of the ultra-long inclined cable damping device 7 connected to the inner tower 50 is shown as follows Figure 5 The collaborative vibration reduction effect of the two damping devices is shown as follows: Figure 6 As shown. Figure 6Analysis of the calculation results shows that the logarithmic attenuation rates of the (1st to 13th) orders of cable 4 all reach above 3.0%, and the logarithmic attenuation rates of the (14th to 60th) orders of cable 4 all reach above 1.5%. In summary, the coordinated vibration reduction scheme can meet the wind-induced vibration control requirements of the (1st to 60th) orders of the longest cable 4 (620 meters) of the bridge.

[0087] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0088] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0089] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An ultra-long stayed cable damping device, characterized in that: It includes: A cableway tube (1) is used for fixedly connecting the bridge body, and one end of the inclined cable (4) extends into the cableway tube (1) and is anchored on the bridge body; At least two dampers (2), the two ends of the dampers (2) are respectively connected to the cableway tube (1) and the inclined cable (4), the two dampers (2) are both arranged along the radial direction of the inclined cable (4), and one of the dampers (2) is located in the installation vertical plane of the inclined cable (4) on the bridge body, and the other damper (2) is perpendicular to the installation vertical plane; Connecting supports (3) fixedly connected to the cableway tube (1) and having a number corresponding to the dampers (2), the dampers (2) being connected to the cableway tube (1) by being connected to the connecting supports (3), and the connection points between the dampers (2) and the connecting supports (3) being located outside the circumference of the cableway tube (1); The top of the cableway tube (1) is fixedly connected to a mounting plate (10), and the mounting plate (10) is axially aligned with the cableway tube (1), and its circumferential diameter is larger than that of the cableway tube (1); the connecting support (3) is detachably connected to the mounting plate (10) extending outside the cableway tube (1); The bottom surface of the mounting plate (10) is provided with a third stiffening rib (102) perpendicular to the mounting plate (10), and the third stiffening rib (102) is parallel to the radial direction corresponding to the third stiffening rib (102) on the mounting plate (10), and the bottom of the connecting support (3) is provided with a U-shaped groove (34) corresponding to the third stiffening rib (102), and the third stiffening rib (102) contacts the connecting support (3) in the U-shaped groove (34) and connects the mounting plate (10), the cableway tube (1) and the bridge body.

2. The ultra-long stayed cable damping device according to claim 1, characterized in that: The mounting plate (10) extending outside the cableway tube (1) is provided with a plurality of mounting hole groups (100), and adjacent mounting hole groups (100) are arranged orthogonally. The mounting hole groups (100) include a plurality of mounting hole positions, and the plurality of mounting holes are arranged at equal intervals along the radial direction of the mounting plate. Bolt hole positions (36) corresponding to the mounting hole positions are provided on the connecting support (3), and the connecting support (3) is fixedly connected to the connecting support (3) by a plurality of fastening bolts (101).

3. The ultra-long stayed cable damping device according to claim 1, characterized in that: One end of the connecting support (3) is provided with a connecting end (31), the connecting end (31) extends to the side of the mounting plate (10) opposite to the cableway tube (1), and the connecting end (31) is provided with a supporting ear plate (32) for connecting the damper (2), and the end of the damper (2) is rotatably connected to the supporting ear plate (32).

4. The ultra-long stayed cable damping device according to claim 1, characterized in that: Four third stiffening ribs (102) are provided on the bottom surface of the mounting plate (10), and the four third stiffening ribs (102) are orthogonally distributed on the bottom surface of the mounting plate (10), wherein two of the third stiffening ribs (102) are located in the mounting vertical surface.

5. The ultra-long stayed cable damping device according to claim 1, characterized in that: The damper (2) and the inclined cable (4) are connected via a cable clamp (35) mounted on the inclined cable (4); the cable clamp (35) is provided with an ear plate corresponding to the damper (2) and enables the cable clamp (35) to be rotatably connected to the end of the damper (2).

6. A cable-stayed bridge, characterized in that: It comprises a stay cable (4) and an ultra-long stay cable damping device (7) according to any one of claims 1 to 5.

7. The cable-stayed bridge according to claim 6, characterized in that: Also includes: A main tower (5) includes an inner tower (50) and an outer tower wall (51) spaced apart and sleeved outside the circumference of the inner tower (50); Main beam (6); The inclined cable (4) passes through the outer tower wall (51) and is respectively connected to the main beam (6) and the inner tower (50) at both ends, and at least two of the extra-long inclined cable damping devices (7) are provided. The two extra-long inclined cable damping devices (7) are respectively connected to the inner tower (50) and the outer tower wall (51), so as to connect the inclined cable (4) from two positions.

8. The cable-stayed bridge according to claim 7, characterized in that: The connection positions between the two super-long cable damping devices (7) and the cable (4) are obtained according to the position of the outer tower wall (51), the position of the inner tower (50), and the wind-induced vibration order control requirements of the cable (4).

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