A cable auxiliary truss combined system bridge with a transparent appearance

Abstract

The present application relates to a kind of appearance transparent type cable auxiliary truss combination system bridge, including upper chord, lower chord, main beam, vertical web, cable-stayed cable and column, the column is installed in the lower end of main beam, for supporting system bridge, the lower chord is integrated structure with main beam, the vertical web is triangular structure, the vertical web is installed above main beam, each vertical web is evenly distributed along the bridge axis of main beam, adjacent vertical web is connected by cable-stayed cable, the upper chord is installed above vertical web, the center line of main beam and the center line of truss are offset by preset distance.Compared with prior art, the present application has the advantages of simple structure, good bridge deck permeability and throughness.

Description

Technical Field

[0001] This invention relates to the field of bridge technology, and in particular to a cable-stayed truss composite system bridge with a transparent appearance. Background Technology

[0002] Beam bridges are primarily subjected to bending forces, resulting in low material utilization, low structural efficiency, tall beams that significantly impact road vertical curves, heavy structures, and poor aesthetic appeal. They are suitable for medium- and small-span bridges. Truss bridges, on the other hand, primarily bear axial forces, allowing for efficient material utilization, lighter weight, and greater span capacity. They are often used in long-span bridges, but the truss structure has a large spatial volume, low lateral stiffness, and generally less aesthetically pleasing appearance.

[0003] For example, invention publication number CN119373230A discloses a flexible diagonal web space truss. A truss includes: chords, comprising an upper chord and a lower chord arranged parallel to each other; vertical web members, with their ends vertically fixed to the upper chord and the lower chord respectively; and diagonal web members, inclinedly arranged between the vertical web members, with their ends connecting to the joints of the chords and the vertical web members. However, its truss structure is obviously complex, and the overall transparency of the bridge is poor.

[0004] Combining the advantages of beam bridges and truss bridges, this paper proposes a cable-stayed truss composite bridge system with a transparent appearance to adapt to different environments and landscape requirements. Conventional truss bridges consist of components such as top chords, bottom chords, web members (vertical web members and diagonal web members), and connecting systems. These components are numerous and complex, resulting in poor transparency and poor bridge deck continuity.

[0005] In summary, beam bridges are primarily subjected to bending forces, resulting in low material utilization, low structural efficiency, tall beams, heavy structures, and poor aesthetic appeal. Truss bridges, on the other hand, are primarily subjected to axial forces, leading to high material utilization, but the truss structure has a large spatial volume and low lateral stiffness. Conventional truss bridges include upper chords, lower chords, web members (vertical and diagonal), and connecting systems, resulting in numerous and complex members, poor permeability, and poor bridge deck continuity. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of conventional truss bridges, such as numerous and complex members, poor transparency, and poor bridge deck continuity, and to provide a cable-stayed truss composite system bridge with a transparent appearance.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A transparent cable-stayed truss composite bridge system includes an upper chord, a lower chord, a main girder, vertical web members, stay cables, and columns. The columns are installed at the lower end of the main girder to support the bridge system.

[0009] The lower chord and the main beam are an integral structure. The vertical web members are triangular structures. The vertical web members are installed above the main beam. Each vertical web member is evenly distributed along the bridge axis of the main beam. Adjacent vertical web members are connected by stay cables. The upper chord is installed above the vertical web members. The centerline of the main beam is offset from the centerline of the truss by a preset distance.

[0010] Preferably, the main beam includes a passage area, a lower truss area, and a green area connected in sequence; the lower truss area is installed on the column, the vertical web members are installed at the upper end of the lower truss area, and the width of the passage area is greater than the width of the green area.

[0011] Preferably, the upper surface of the passage area is provided with a UHPC layer and an MMA layer from bottom to top, the thickness of the UHPC layer is 45-55mm, and the thickness of the MMA layer is 5-5.5mm.

[0012] Preferably, the upper surfaces of the lower truss area and the greening area are sequentially covered with a UHPC layer, a sand layer and a planting soil layer from bottom to top for planting plants.

[0013] Preferably, drainage ditches are provided on both sides of the main beam, and the upper surface of the drainage ditches is lower than the upper surface of the main beam.

[0014] Preferably, the vertical bracing includes a high pole, a transition pole, and a low pole with progressively decreasing heights. The high pole and the low pole are alternately distributed. The transition pole is installed between the high pole and the low pole, and the height of the transition pole decreases progressively from the high pole to the low pole. One end of the stay cable is connected to the top of the high pole, and the other end is connected to the bottom of the adjacent transition pole. The stay cable between adjacent transition poles is connected from the top of the higher transition pole to the bottom of the lower transition pole.

[0015] Preferably, the stay cable between the low pole and the transition pole is detachable.

[0016] Preferably, the offset distance between the centerline of the main beam and the centerline of the truss is set according to the functional area offset requirements.

[0017] Preferably, railings are provided on both sides of the main beam.

[0018] Preferably, a pergola is installed on both sides of the upper chord, and the pergola is located directly above the main beam.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) This scheme integrates the lower chord with the main beam, directly installing the vertical web members on the main beam and the upper chord on the upper end of the vertical web members. The truss and the vertical web members are symmetrically arranged, and the centerline of the main beam is offset from the centerline of the truss by a preset distance, so that the truss is located on one side of the upper end face of the main beam, providing a passageway. Compared with beam bridges, the truss increases the tensile and compressive couple of the structure, effectively reducing the bending moment of the beam, improving material utilization, resulting in higher structural efficiency and a lighter structure with a lower beam height. The cross-section adopts a triangular truss to improve lateral stability, effectively improve the stress on the members, and thus reduce the cross-sectional size of the members, saving materials. Compared with conventional truss bridges, the stress distribution ratio of each part of the structure can be designed according to actual needs, making the design more flexible.

[0021] (2) The overall height-to-span ratio of the truss in this scheme varies greatly, so a lower truss height can be used to reduce the spatial volume of the truss and make the overall landscape effect of the bridge better.

[0022] (3) This scheme can eliminate some of the stay cables. The tensioned diagonal web members can be made of prefabricated cables or steel rods, making full use of the material properties, resulting in smaller size, smaller volume, and better transparency. The areas without diagonal web members can serve as transverse passageways on the bridge deck, which can adapt to different environments and landscape requirements, and the bridge deck has good connectivity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of one end of the bridge system provided by the present invention;

[0024] Figure 2 This is a front view of the bridge system provided by the present invention;

[0025] Figure 3 Cross-sectional view of the bridge system provided by the present invention;

[0026] In the diagram: 110, top chord; 120, main beam; 130, vertical web member; 140, stay cable; 150, column; 160, pergola; 1201, passageway; 1202, lower truss area; 1203, green area; 1204, drainage ditch; 1205, railing. Detailed Implementation

[0027] 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, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0031] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] Example 1

[0034] like Figures 1 to 3 As shown, this embodiment provides a transparent cable-stayed truss composite bridge system, including an upper chord 110, a lower chord, a main beam 120, vertical web members 130, stay cables 140, and columns 150. The columns 150 are installed at the lower end of the main beam 120 to support the bridge system.

[0035] The lower chord and the main beam 120 are an integral structure. The vertical web members 130 are triangular structures. The vertical web members 130 are installed above the main beam 120. Each vertical web member 130 is evenly distributed along the bridge axis of the main beam 120. Adjacent vertical web members 130 are connected by stay cables 140. The upper chord 110 is installed above the vertical web members 130. The centerline of the main beam 120 is offset from the centerline of the truss by a preset distance.

[0036] Specifically, based on the structural stress characteristics, and while ensuring structural safety and reliability, the centerline of the main beam 120mm is offset from the centerline of the truss by a predetermined distance. This allows for a reasonable arrangement of the widths of each functional area, expanding the passage area of ​​the main beam.

[0037] Through the integrated design of the lower chord and the main beam 120, the vertical web members 130 are directly installed on the main beam 120, and the upper chord 110 is installed on the upper end of the vertical web members 130. The truss and the vertical web members 130 are symmetrically arranged as a whole. The center line of the main beam and the center line of the truss are offset by a preset distance, so that the truss is located on one side of the upper end face of the main beam 120, providing a passageway.

[0038] Compared to beam bridges, trusses increase the tensile and compressive couples of the structure, effectively reducing the bending moment of the beams, improving material utilization, resulting in higher structural efficiency, lower beam height, and a lighter structure. The use of triangular trusses in the cross-section improves lateral stability, effectively improving the stress distribution on the members, thereby allowing for a reduction in member cross-sectional dimensions and saving materials. Compared to conventional truss bridges, the stress distribution ratio of different parts of the structure can be designed according to actual needs, offering greater design flexibility.

[0039] In this embodiment, the truss form can be adjusted according to functional requirements, structural stress, and aesthetic considerations. The main beam can be made of steel, concrete, or a composite structure. The columns can be made of steel, concrete, or a composite structure, and can use uniform or variable cross-sections, adjusted according to the actual environment, to provide overall load-bearing support for the bridge.

[0040] Preferred implementation methods, such as Figure 2 As shown, the main beam 120 includes a passage area 1201, a lower truss area 1202 and a green area 1203 connected in sequence; the lower truss area 1202 is installed on the column 150, and the vertical web members 130 are installed at the upper end of the lower truss area 1202. The width of the passage area 1201 is greater than the width of the green area 1203.

[0041] The main beam adopts a modular layout with the passage area, lower truss area, and green area connected sequentially. The lower truss area, as the core support unit, is installed on the 150mm column and reinforced with 130mm vertical braces to enhance the vertical load-bearing capacity of the truss. The force path is clear, effectively improving the overall rigidity of the structure. The passage area is wider than the green area, prioritizing the use of space for the core traffic function. The zoning design also avoids mutual interference between the passage and green functions.

[0042] Furthermore, the upper surface of the passage area 1201 is covered with a UHPC layer and an MMA layer from bottom to top, with the UHPC layer having a thickness of 45-55mm and the MMA layer having a thickness of 5-5.5mm. The upper surfaces of the lower truss area 1202 and the greening area 1203 are covered with a UHPC layer, a sand layer, and a planting soil layer from bottom to top for planting plants.

[0043] This bridge structure serves a dual purpose: facilitating traffic flow and promoting ecological greening. The green area utilizes a layered construction of UHPC, sand, and planting soil layers to provide suitable conditions for plant growth, thus achieving an ecological transformation of the bridge deck. The traffic area employs a combination of a 45-55mm thick UHPC layer and a 5-5.5mm thick MMA layer, providing both high crack resistance and strength while also offering wear resistance and anti-slip properties. The green area uses a UHPC layer as its base, ensuring both load-bearing capacity and waterproofing, while the planting soil layer meets greening requirements. The extensive use of UHPC materials further enhances structural durability and reduces long-term maintenance costs. Overall, the bridge is functionally integrated, structurally stable, durable, practical, and eco-friendly.

[0044] In this embodiment, as Figure 1 As shown, drainage ditches 1204 are provided on both sides of the main beam 120, and the upper surface of the drainage ditches 1204 is lower than the upper surface of the main beam 120. Furthermore, railings 1205 are provided on both sides of the main beam 120, and the drainage ditches 1204 are positioned outside the railings 1205.

[0045] The upper surface of the drainage ditch is lower than the surface of the main beam, naturally creating a slope for water collection. This allows for the rapid collection of rainwater from the bridge surface, preventing water accumulation. The drainage ditch can be installed at an angle or at both ends of the main beam, directly guiding water out of the bridge surface, reducing rainwater erosion of the bridge surface materials and extending the structural lifespan. Furthermore, rapid drainage prevents slippery road surfaces, reduces traffic safety hazards, and improves stability during rainy weather.

[0046] Furthermore, the railings on both sides of the main beam effectively protect the drainage ditch, preventing accidental collisions or trampling by pedestrians and vehicles that could damage the drainage facilities, while also preventing debris from falling directly into the ditch and causing blockages. In addition, the drainage ditch is located outside the railings, away from the core traffic area of ​​the bridge deck, so subsequent inspection, cleaning, or maintenance do not require occupying traffic space, making operations more convenient and not affecting the normal use of the bridge.

[0047] In this embodiment, as Figure 2 As shown, the vertical strut 130 includes a high strut, a transition strut, and a low strut with progressively decreasing heights. The high strut and the low strut are alternately distributed. The transition strut is installed between the high strut and the low strut, and the height of the transition strut decreases progressively from the high strut to the low strut. One end of the cable 140 is connected to the top of the high strut, and the other end is connected to the bottom of the adjacent transition strut. The cable 140 between adjacent transition struts is connected from the top of the higher transition strut to the bottom of the lower transition strut.

[0048] The vertical web members employ an alternating distribution of high, transition, and low members with gradually varying heights. Combined with the diagonal connection from the top of the high cable-stayed member to the bottom of the adjacent transition member, and from the top of the high transition member to the bottom of the low transition member, a continuous and smooth force transfer path is formed, effectively dispersing the bridge deck load and improving the overall structural stiffness and stability. The tension-bearing diagonal web members utilize prefabricated cables or steel tie rods, precisely matching the tension conditions and fully utilizing the tensile strength of the materials. Compared to traditional components, they are smaller and lighter, significantly optimizing the structural volume while ensuring structural safety. The internal forces of the combined system can be adjusted by regulating the cable tension, making the stress distribution more flexible.

[0049] Furthermore, the stay cables 140 between the low pole and the transition pole are detachable. This allows for the removal of some stay cables 140, thereby connecting the traffic area and green area on the main beam road surface, improving the bridge's transparency while ensuring its structural stability.

[0050] The stay cables between the low-lying poles and the transition poles are detachable, and partial removal of the stay cables is also possible. This facilitates future maintenance, replacement, or structural adjustments based on actual load requirements, and allows for flexible adaptation to different environments and landscape needs. The truss height-to-span ratio varies widely, allowing for lower truss heights, significantly reducing the truss volume and minimizing visual oppression on the surrounding environment.

[0051] The tension-bearing diagonal bracing structure uses small-sized cables or steel tie rods, combined with a low truss height design, which greatly improves the transparency of the bridge deck and creates a lighter and more harmonious landscape effect. Areas without diagonal cables can serve as transverse passageways on the bridge deck, ensuring the continuity of traffic flow while reserving space for pipeline installation, emergency access, and other purposes, adapting to diverse usage scenarios.

[0052] In this embodiment, pergolas 160 are installed on both sides of the upper chord 110, located directly above the main beam 120. Positioned directly above the main beam, the pergolas provide direct shade to the bridge's passageway and green areas, effectively blocking sun and rain, improving the comfort of pedestrians and vehicles, and are particularly suitable for rainy and sunny areas. Simultaneously, the pergolas themselves can serve as a decorative element of the bridge's landscape. By designing different shapes and materials, they can harmonize with the overall bridge structure and surrounding environment, softening the industrial feel of the truss structure and enhancing the bridge's aesthetic appeal. Furthermore, the pergolas can conceal pipelines and other facilities above the bridge deck, resulting in a cleaner and more unified appearance, suitable for the landscape needs of different scenarios such as urban roads and scenic areas.

[0053] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A cable-stayed truss composite bridge system with a transparent appearance, comprising an upper chord (110), a lower chord, a main beam (120), vertical web members (130), stay cables (140), and columns (150), wherein the columns (150) are installed at the lower end of the main beam (120) to support the bridge system, characterized in that, The lower chord and the main beam (120) are an integral structure. The vertical web members (130) are triangular structures. The vertical web members (130) are installed above the main beam (120). Each vertical web member (130) is evenly distributed along the bridge axis of the main beam (120). Adjacent vertical web members (130) are connected by stay cables (140). The upper chord (110) is installed above the vertical web members (130). The centerline of the main beam (120) is offset from the centerline of the truss by a preset distance. The main beam (120) includes a passage area (1201), a lower truss area (1202), and a green area (1203) connected in sequence; the lower truss area (1202) is installed on the column (150), the vertical web member (130) is installed at the upper end of the lower truss area (1202), and the width of the passage area (1201) is greater than the width of the green area (1203); The upper surface of the passage area (1201) is covered with a UHPC layer and an MMA layer from bottom to top. The thickness of the UHPC layer is 45-55mm and the thickness of the MMA layer is 5-5.5mm. The upper surfaces of the lower truss area (1202) and the green area (1203) are covered with a UHPC layer, a sand layer and a planting soil layer from bottom to top for planting plants.

2. The cable-stayed truss composite bridge with a transparent appearance according to claim 1, characterized in that, The main beam (120) is provided with drainage ditches (1204) on both sides, and the upper surface of the drainage ditch (1204) is lower than the upper surface of the main beam (120).

3. The cable-stayed truss composite bridge with a transparent appearance according to claim 1, characterized in that, The vertical bracing (130) includes a high pole, a transition pole, and a low pole with decreasing heights in sequence. The high pole and the low pole are alternately distributed. The transition pole is installed between the high pole and the low pole, and the height of the transition pole decreases sequentially from the high pole to the low pole. One end of the cable (140) is connected to the top of the high pole, and the other end is connected to the bottom of the adjacent transition pole. The cable (140) between adjacent transition poles is connected from the top of the higher transition pole to the bottom of the lower transition pole.

4. A cable-stayed truss composite bridge with a transparent appearance according to claim 3, characterized in that, The cable (140) between the low pole and the transition pole is detachable.

5. A cable-stayed truss composite bridge with a transparent appearance according to claim 3, characterized in that, The offset distance between the centerline of the main beam (120) and the centerline of the truss is set according to the offset requirements of the functional area.

6. A cable-stayed truss composite bridge with a transparent appearance according to claim 1, characterized in that, The main beam (120) is provided with railings (1205) on both sides.

7. A cable-stayed truss composite bridge with a transparent appearance according to claim 1, characterized in that, A pergola (160) is installed on both sides of the upper chord (110), and the pergola (160) is located directly above the main beam (120).

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