Net-shaped suspender cable bridge
By introducing a mesh suspender cable structure into a long-span cable-stayed bridge system, and using inclined suspenders to form a spatial triangular force transmission system, the problem of excessive displacement of the main girder under longitudinal loads was solved, thus improving the stability and safety of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD
- Filing Date
- 2026-03-31
- Publication Date
- 2026-05-12
AI Technical Summary
Long-span cable-stayed-suspension bridges exhibit excessive displacement of the main girder under longitudinal loads, resulting in low structural stability.
The bridge adopts a mesh-like suspender cable bridge structure, including two bridge towers, main beams, multiple stay cables, two main cables, and two sets of suspender assemblies. By setting suspenders inclined along the longitudinal direction on both sides of the main beam, a spatial triangular force transmission system is formed, which enhances the longitudinal constraint stiffness.
It effectively suppresses the longitudinal displacement of the main beam under vehicle braking and wind load, thereby improving the overall stability and safety of the bridge.
Smart Images
Figure CN122013652A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bridge technology, and in particular to a mesh-type suspension cable bridge. Background Technology
[0002] With the rapid development of bridge construction in my country, long-span cable-stayed bridges have become an important structural form for crossing natural obstacles such as rivers and canyons. To simultaneously meet the requirements of long span and structural stiffness, cable-stayed-suspension bridge systems have emerged. These systems involve placing cable stays near the bridge towers to provide sufficient structural stiffness, while the main span is converted into a suspension system in the middle section, utilizing the main cable to achieve ultra-long spans.
[0003] However, under long-span conditions, the existing cable-stayed-suspension bridge system has a weak constraint effect on the main beam in the longitudinal direction when subjected to longitudinal loads. Under the action of longitudinal forces such as vehicle braking and wind loads, the main beam is prone to large longitudinal displacement, resulting in low overall stability. Summary of the Invention
[0004] This invention provides a mesh-type cable-stayed bridge to address the technical problem in related technologies where large-span cable-stayed-suspension bridges experience excessive main girder displacement and low structural stability under longitudinal loads.
[0005] This invention provides a mesh-type suspension cable bridge, which includes: Two bridge towers, which are spaced apart along the longitudinal direction of the bridge; The main girder extends longitudinally along the bridge direction and passes through the two bridge towers; Multiple stay cables are symmetrically distributed on both sides of the tower body of each bridge tower. The multiple stay cables on each side extend symmetrically to both sides. The upper end of each stay cable is connected to the corresponding bridge tower, and the lower end is connected to the main beam. Two main cables are located on both sides of the main beam and are positioned above the main beam along the longitudinal direction of the bridge. The main cables pass through the top of each bridge tower and are fixed at both ends to the banks. Two sets of hanger assemblies are located on both sides of the main beam. Each set of hanger assemblies includes multiple hangers that are inclined along the longitudinal direction of the bridge. One end of each hanger is connected to the main cable and the other end is connected to the main beam.
[0006] In some embodiments, adjacent booms are connected at their ends, booms at odd-numbered positions have the same first tilt angle, booms at even-numbered positions have the same second tilt angle, and the first tilt angle is not equal to the second tilt angle.
[0007] In some embodiments, the angle between the projection of each of the hangers in the vertical plane and the main beam is not less than sixty degrees.
[0008] In some embodiments, at least a portion of the boom and at least a portion of the stay cable are arranged to cross each other in space.
[0009] In some embodiments, the number of intersections between the boom and the stay cable is no less than eight pairs.
[0010] In some embodiments, the system further includes four side piers, which are respectively disposed below the two ends of the main beam in the longitudinal direction of the bridge, for directly supporting the ends of the main beam.
[0011] In some embodiments, the system further includes four dampers, each of which is provided on one end of the four side piers near the main beam.
[0012] In some embodiments, the bridge also includes: multiple auxiliary piers, which are divided into two groups and located at both ends of the bridge, and the multiple auxiliary piers are used to directly support the main beam.
[0013] In some embodiments, the system further includes: a plurality of locking clips, which are divided into two groups and fixed to the corresponding main cable for connecting one end of two adjacent booms.
[0014] In some embodiments, each of the booms is a parallel wire bundle structure.
[0015] The beneficial effects of the technical solution provided by this invention include: This invention provides a mesh-type cable-stayed bridge, comprising two bridge towers, a main beam, multiple stay cables, two main cables, and two sets of suspender assemblies. The two bridge towers are spaced apart along the longitudinal direction of the bridge. The main beam extends along the longitudinal direction and passes through the two bridge towers. The multiple stay cables are symmetrically distributed on both sides of the tower body of each bridge tower, with each stay cable extending symmetrically to both sides. The upper end of each stay cable is connected to the corresponding bridge tower, and the lower end is connected to the main beam. The two main cables are located on both sides of the main beam and are positioned above the main beam along the longitudinal direction. The main cables pass through the top of each bridge tower and are fixed at both ends to the banks. The two sets of suspender assemblies are located on both sides of the main beam. Each set of suspender assemblies has multiple suspenders inclined along the longitudinal direction, with one end of each suspender connected to the main cable and the other end connected to the main beam. The mesh-type suspender cable bridge provided in this embodiment forms a spatial triangular force transmission system by installing suspenders inclined along the longitudinal direction on both sides of the main girder. When the main girder bears longitudinal loads, the inclined suspenders can effectively transfer the longitudinal force component to the main cable, bridge towers, and both banks, enhancing the longitudinal constraint stiffness of the structural system. This overcomes the limitation of traditional vertical suspenders that only transmit vertical forces, effectively suppressing the longitudinal displacement of the main girder under vehicle braking and wind loads, and improving the overall stability and safety of the bridge. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 An elevation view of a mesh-type cable-stayed bridge provided in an embodiment of the present invention; Figure 2 A partial structural schematic diagram of a mesh-type cable-stayed bridge provided in an embodiment of the present invention; Figure 3 A schematic diagram of the clamping force of a mesh suspender cable bridge provided in an embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram provided for an embodiment of the present invention; Figure label: 1. Bridge tower; 2. Main beam; 3. Cable stays; 4. Main cable; 5. Suspension rod assembly; 51. Suspension rod; 6. Side piers; 7. Dampers; 8. Auxiliary piers; 9. Locking clip. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] This invention provides a mesh-type cable-stayed bridge to address the technical problem in related technologies where large-span cable-stayed-suspension bridges experience excessive main girder displacement and low structural stability under longitudinal loads.
[0020] See Figure 1 and Figure 2 As shown in the figure, an embodiment of the present invention provides a mesh-like cable-stayed bridge, which includes two bridge towers 1, a main beam 2, multiple stay cables 3, two main cables 4, and two sets of suspender assemblies 5. The two bridge towers 1 are spaced apart along the longitudinal direction of the bridge. The main beam 2 extends along the longitudinal direction of the bridge and passes through the two bridge towers 1. The multiple stay cables 3 are symmetrically distributed on both sides of the tower body of each bridge tower 1, and the multiple stay cables 3 on each side extend symmetrically to both sides. The upper end of each stay cable 3 is connected to the corresponding bridge tower 1, and the lower end is connected to the main beam 2. The two main cables 4 are located on both sides of the main beam 2 and are both located above the main beam 2 along the longitudinal direction of the bridge. The main cables 4 pass through the top of each bridge tower 1 and are fixed at both ends to the banks. The two sets of suspender assemblies 5 are located on both sides of the main beam 2. Each set of suspender assemblies 5 has multiple suspenders 51 that are inclined along the longitudinal direction of the bridge. One end of each suspender 51 is connected to the main cable 4, and the other end is connected to the main beam 2. The mesh-type cable-stayed bridge provided in this embodiment of the invention uses inclined hangers 51 on both sides of the main girder 2 along the longitudinal direction to form a spatial triangular force transmission system with the hangers 51, the main girder 2, and the main cable 4. When the main girder 2 is subjected to longitudinal loads, the inclined hangers 51 can effectively transfer the longitudinal force component to the main cable 4, the bridge tower 1, and both banks, enhancing the longitudinal constraint stiffness of the structural system and changing the limitation of traditional vertical hangers that only transmit vertical forces. This effectively suppresses the longitudinal displacement of the main girder 2 under vehicle braking and wind loads, improving the overall stability and safety of the bridge.
[0021] This invention provides a mesh-type cable-stayed bridge, comprising two bridge towers, a main beam, multiple stay cables, two main cables, and two sets of suspender assemblies. The two bridge towers are spaced apart along the longitudinal direction of the bridge. The main beam extends along the longitudinal direction and passes through the two bridge towers. The multiple stay cables are symmetrically distributed on both sides of the tower body of each bridge tower, with each stay cable extending symmetrically to both sides. The upper end of each stay cable is connected to the corresponding bridge tower, and the lower end is connected to the main beam. The two main cables are located on both sides of the main beam and are positioned above the main beam along the longitudinal direction. The main cables pass through the top of each bridge tower and are fixed at both ends to the banks. The two sets of suspender assemblies are located on both sides of the main beam. Each set of suspender assemblies has multiple suspenders inclined along the longitudinal direction, with one end of each suspender connected to the main cable and the other end connected to the main beam. The mesh-type suspender cable bridge provided in this embodiment forms a spatial triangular force transmission system by installing suspenders inclined along the longitudinal direction on both sides of the main girder. When the main girder bears longitudinal loads, the inclined suspenders can effectively transfer the longitudinal force component to the main cable, bridge towers, and both banks, enhancing the longitudinal constraint stiffness of the structural system. This overcomes the limitation of traditional vertical suspenders that only transmit vertical forces, effectively suppressing the longitudinal displacement of the main girder under vehicle braking and wind loads, and improving the overall stability and safety of the bridge.
[0022] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, adjacent suspenders 51 are connected at their ends. Suspensions 51 at odd-numbered positions have the same first inclination angle, and suspenders 51 at even-numbered positions have the same second inclination angle. The first inclination angle is not equal to the second inclination angle. In this embodiment of the invention, by connecting adjacent suspenders 51 at their ends, multiple suspenders 51 form a continuous chain-like force transmission path. Suspensions 51 at odd-numbered positions maintain the same first inclination angle, and suspenders 51 at even-numbered positions maintain the same second inclination angle, with the first inclination angle not equal to the second inclination angle. This creates a regularly alternating force transmission structure in the longitudinal direction of the bridge, effectively improving the uniformity of load transmission between the main cable 4 and the main beam 2, enhancing the integrity of the mesh suspender cable bridge under coupled longitudinal and vertical stress conditions, thereby ensuring the stability and fatigue durability of the bridge.
[0023] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2As shown, the angle between the projection of each hanger 51 in the vertical plane and the main beam 2 is not less than sixty degrees. In this embodiment of the invention, the angle between the projection of each hanger 51 in the vertical plane and the main beam 2 is not less than sixty degrees, ensuring that the hanger 51 has longitudinal force transmission efficiency when transmitting loads, improving the constraint ability of the mesh hanger cable bridge on the longitudinal displacement of the main beam 2, and reducing fatigue damage of the hanger 51, thereby enhancing the overall stability and durability of the bridge under longitudinal loads.
[0024] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, at least some of the suspenders 51 and at least some of the stay cables 3 are arranged intersecting in space. In this embodiment of the invention, by arranging at least some of the suspenders 51 and at least some of the stay cables 3 intersecting in space, at least some of the stay cables 3 and at least some of the suspenders 51 form a natural transition and cooperative force transmission area, thereby improving the overall stress performance and fatigue resistance of the mesh suspender cable bridge.
[0025] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the number of intersections between the suspender 51 and the stay cable 3 is no less than eight pairs. In this embodiment of the invention, the number of intersections between the suspender 51 and the stay cable 3 is no less than eight pairs, which ensures that a sufficiently dense and continuous spatial cross-force transmission structure is formed in the transition area on both sides of the bridge tower 1, enhances the synergistic working effect between the stay cable 3 and the suspender 51, and thus improves the overall stability and deformation resistance of the bridge under longitudinal loads.
[0026] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, the mesh-like cable-stayed bridge also includes four side piers 6, which are respectively located below both ends of the main beam 2 in the longitudinal direction, for directly supporting the ends of the main beam 2. In this embodiment of the invention, by adding two side piers 6 below both ends in the longitudinal direction and directly supporting and connecting them to the ends of the main beam 2, this structure can provide vertical constraint at the ends of the main beam 2, reduce beam end deflection, and enhance the overall stiffness and stability of the bridge.
[0027] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, the mesh-like cable-stayed bridge also includes four dampers 7, with each of the four side piers 6 having a damper 7 at one end near the main beam 2. In this embodiment of the invention, by installing dampers 7 at the ends of the two side piers 6 near the main beam 2, effective longitudinal damping constraints are provided for the main beam 2, consuming the vibration energy caused by vehicle braking, wind loads, and seismic actions, further suppressing the longitudinal displacement of the main beam 2, thereby improving the overall dynamic performance of the bridge.
[0028] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, the mesh-like cable-stayed bridge also includes multiple auxiliary piers 8, which are divided into two groups and respectively located at both ends of the bridge. These auxiliary piers 8 directly support the main beam 2. In this embodiment of the invention, by setting multiple groups of auxiliary piers 8 at both ends of the bridge to directly support the main beam 2, the vertical load of the main beam 2 in the side span area is shared, reducing the side span deflection and increasing the overall stiffness. Combined with the bridge tower 1 and the side piers 6, this forms a multi-point, multi-layered vertical support, thereby optimizing the overall stress distribution and improving the stability and load-bearing efficiency of the bridge.
[0029] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 3 As shown, the mesh-like cable bridge also includes multiple locking clamps 9, which are divided into two groups and fixed to the corresponding main cables 4, for connecting one end of two adjacent suspenders 51. Under constant load, by adjusting the cable force of the suspender 51 at the same locking clamp 9, the cable force F of the suspender 51 on the side span can be adjusted. t1 Greater than the cable force F of the mid-span side suspension rod t2 This reduces the sliding force of the locking clip 9 and improves its anti-slip stability. To ensure the anti-slip stability of the locking clip 9, it is necessary to meet the F... s / (F t2 ·cosθ- F t1 ·cosα)≥3. Where F s Let θ be the anti-slip coefficient of the locking clamp 9, θ be the angle between the tangent of the main cable at the locking clamp 9 and the α be the angle between the tangent of the main cable 4 at the locking clamp 9 and the 51 on the side span. In this embodiment of the invention, by setting a locking clamp 9 on the main cable 4 for clamping and fixing, and connecting one end of two suspenders 51 simultaneously, the anchorage points of the suspenders 51 can be integrated, the local stress state of the main cable 4 can be optimized, the force transmission between adjacent suspenders 51 can be enhanced, and the regular arrangement of multiple suspenders 51 in the longitudinal direction of the bridge can be realized, thereby enhancing the integrity and structural efficiency of the mesh suspender cable bridge.
[0030] As an optional implementation, in one embodiment of the invention, each hanger 51 adopts a parallel wire bundle structure. The parallel wire bundle structure has extremely high tensile strength and good fatigue resistance, and can withstand the complex stress generated when the hanger 51 transmits loads. At the same time, the compact cross-section of the parallel wire bundle helps to reduce wind resistance and reduce the risk of wind-induced vibration, thereby improving the long-term durability and safety of the hanger 51 and increasing the overall service life of the bridge.
[0031] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.
[0032] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0033] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. 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 invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.
Claims
1. A mesh-structured cable-stayed bridge, characterized in that, include: Two bridge towers (1) are spaced apart along the longitudinal direction of the bridge. Main beam (2), which extends longitudinally and passes through the two bridge towers (1); Multiple stay cables (3) are symmetrically distributed on both sides of the tower body of each bridge tower (1). The multiple stay cables (3) on each side extend symmetrically to both sides. The upper end of each stay cable (3) is connected to the corresponding bridge tower (1), and the lower end is connected to the main beam (2). Two main cables (4) are located on both sides of the main beam (2) and are arranged above the main beam (2) along the longitudinal direction of the bridge. The main cables (4) pass through the top of each bridge tower (1) and are fixed at both ends to the banks respectively. Two sets of hanger assemblies (5) are located on both sides of the main beam (2). Each set of hanger assemblies (5) includes multiple hangers (51) that are inclined along the longitudinal direction of the bridge. One end of each hanger (51) is connected to the main cable (4) and the other end is connected to the main beam (2).
2. A mesh-structured cable-stayed bridge according to claim 1, characterized in that: The adjacent booms (51) are connected by their ends. The booms (51) located at odd positions have the same first tilt angle, and the booms (51) located at even positions have the same second tilt angle. The first tilt angle is not equal to the second tilt angle.
3. A mesh-structured cable-stayed bridge according to claim 1, characterized in that: The angle between the projection of each of the hanging rods (51) in the vertical plane and the main beam (2) is not less than sixty degrees.
4. A mesh-like suspension cable bridge according to claim 1, characterized in that: At least some of the suspenders (51) and at least some of the stay cables (3) are arranged to cross each other in space.
5. A mesh-like suspension cable bridge according to claim 4, characterized in that: The number of intersections between the suspender rod (51) and the cable (3) is no less than eight pairs.
6. A mesh-structured cable-stayed bridge according to claim 1, characterized in that, Also includes: Four side piers (6) are respectively set below the two ends of the main beam (2) in the longitudinal direction, and are used to directly support the ends of the main beam (2).
7. A mesh-structured cable-stayed bridge according to claim 6, characterized in that, Also includes: Four dampers (7) are provided on one end of each of the four side piers (6) near the main beam (2).
8. A mesh-structured cable-stayed bridge according to claim 1, characterized in that, Also includes: Multiple auxiliary piers (8) are divided into two groups and set at both ends of the bridge. The multiple auxiliary piers (8) are used to directly support the main beam (2).
9. A mesh-structured cable-stayed bridge according to claim 1, characterized in that, Also includes: Multiple locking clips (9) are divided into two groups and fixed to the corresponding main cable (4) for connecting one end of two adjacent booms (51).
10. A mesh-like suspension cable bridge according to claim 1, characterized in that: Each of the aforementioned rods (51) is a parallel wire bundle structure.