Inhaul cable type curved bar wind bracing connecting structure between arch bridge arch ribs

Abstract

The utility model relates to an inhaul cable type curved bar wind brace connecting structure between arch ribs of an arch bridge, which comprises a curved bar wind brace, an inhaul cable, an auxiliary arch rib and a main arch rib, the axis of the main arch rib is a plane curve, the axis of the curved bar wind brace and the axis of the auxiliary arch rib are space curves, the projection of the curved bar wind brace and the auxiliary arch rib on the horizontal plane is an arc curve, and the space curve is a plane curve. One ends of the main arch ribs intersect at the center of the bridge cross section, the other ends of the main arch ribs extend to the two sides of the bridge cross section, one ends of the auxiliary arch ribs are connected with the intersection ends of the main arch ribs, the other ends of the auxiliary arch ribs are connected with the extending ends of the main arch ribs, the curved bar wind braces are connected with the adjacent auxiliary arch ribs, and inhaul cables are connected between the adjacent curved bar wind braces. Compared with the prior art, the problems of additional deformation and additional stress caused by the fact that the curved bar is directly and independently used as a wind brace are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge engineering and relates to a cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge. Background Art

[0002] For steel arch bridges with multiple arch ribs, transverse wind bracing is usually set between the multiple arch ribs in the transverse direction of the bridge to improve the overall lateral stiffness (i.e., transverse stiffness) of the arch ribs and improve the overall lateral stability of the arch ribs under static and dynamic forces. However, the traditional and conventional transverse wind bracing structures are generally I-shaped, K-shaped, X-shaped, and M-shaped cross bracing rods, which are relatively simple in shape. With the innovation of bridge landscape shape, the traditional transverse wind bracing shape needs to be broken through.

[0003] In view of the fact that the wind bracing structure in the arch bridge generally adopts straight rods, due to the need for innovation in the arch bridge arch rib landscape modeling, more and more curved shapes are used in the arch ribs. In order to maintain the overall coordination and consistency of the curved shapes, it is necessary to use the curved rod as the wind bracing structure in the arch bridge. However, due to the initial curvature in the curved surface of the curved rod, the initial stiffness in the curved direction is low, the deformation of the component after being stressed is large, and the bearing capacity of the component is low, which limits the application of the curved rod wind bracing in the bridge field. It is necessary to innovate the constraint conditions of the curved rod wind bracing in the bridge structure, improve its stiffness in the curved direction, limit the deformation of the component in the curved direction, and improve the bearing capacity of the component, so as to expand the application scope of the curved rod wind bracing.

[0004] Patent CN115897368A discloses an X-shaped parallel connection structure, bridge and design method thereof, including steel box arch rib, parallel connection main pipe and parallel connection branch pipe, the parallel connection main pipe is connected to the steel box arch rib in an X shape; the parallel connection branch pipe is connected between the steel box arch rib and the parallel connection main pipe, and is used to improve the stability and bearing capacity of the parallel connection main pipe. However, the axis of the parallel connection branch pipe, the main connecting component of the patent, is a straight line, and the shape is rigid after being arranged in an array with equal spacing, and the curved rod cannot be directly used in the load-bearing structure.

[0005] Patent CN214613555U discloses a butterfly arch rib transverse connection device, including an oblique brace connecting the main arch node and the secondary arch node, and a transverse brace connecting the secondary arch node and the secondary arch node, wherein the oblique brace includes a field spliced ​​rod and a factory-made part, wherein the field spliced ​​rod is welded into a box-shaped structure by a top plate, a bottom plate and a web plate, wherein one end of the factory-made part is welded to the secondary arch and the main arch rib, and the other end is welded to the field spliced ​​rod; wherein the transverse brace includes a field spliced ​​rod and a factory-made part, wherein the field spliced ​​rod is welded into a box-shaped structure by a top plate, a bottom plate and a web plate, wherein one end of the factory-made part is welded to the secondary arch rib, and the other end is welded to the field spliced ​​rod. However, the transverse brace and oblique brace of the patent are both straight components, and the axis lines are both straight lines, and the axis line shape is relatively rigid, and the curved rod cannot be directly applied in the load-bearing structure. Utility Model Content

[0006] The purpose of the present invention is to provide a cable-type curved rod wind bracing connection structure between the arch ribs of an arch bridge in order to overcome at least one defect of the above-mentioned prior art. The present invention improves the additional deformation and additional force problems caused by the direct use of the curved rod as a wind brace.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] One of the technical solutions of the utility model is to provide a cable-type curved rod wind brace connection structure between arch ribs of an arch bridge, the structure comprising a curved rod wind brace, a cable, an auxiliary arch rib and a main arch rib, the axis of the main arch rib being a plane curve, the axes of the curved rod wind brace and the auxiliary arch rib being a spatial curve, the projections on the horizontal plane being an arc curve, one end of the main arch rib intersecting at the center of the bridge cross section, and the other end extending to both sides of the bridge cross section, one end of the auxiliary arch rib being connected to the intersecting end of the main arch rib, and the other end being connected to the extended end of the main arch rib, the curved rod wind brace connecting adjacent auxiliary arch ribs, and cables being connected between adjacent curved rod wind braces, the cables on the one hand can limit the problem of large deformation of the curved rod wind brace after being subjected to force due to its own initial curved shape, and on the other hand can adjust the internal force of the curved rod wind brace by adjusting the cable force, further improving the constraint conditions of the curved rod wind brace, and significantly improving the phenomenon of large deformation and reduced bearing capacity of the curved rod wind brace after being subjected to force.

[0009] As a preferred technical solution, a cable is provided at the end with the largest curvature of the curved rod wind brace.

[0010] Furthermore, the plane projection curve axis form of the curved rod wind brace includes an arc, a parabola, a high-order parabola, a catenary, a spline curve or a high-order curve.

[0011] Furthermore, the cross-sectional shape of the curved rod wind brace includes rectangular, polygonal, triangular, circular or elliptical.

[0012] Furthermore, the curved rod wind bracing includes top and bottom plates, web plates, partitions and stiffening ribs, a web plate is arranged between the top and bottom plates, a partition plate is arranged between the top and bottom plates and the web plates, and stiffening ribs are arranged on the top and bottom plates and the web plates.

[0013] Furthermore, one end of the auxiliary arch ribs intersects to form an auxiliary arch rib merging section, which is connected to the intersecting end of the main arch rib, and the other end is connected to the extended end of the main arch rib through the auxiliary arch rib connecting section, and the curved axis of the auxiliary arch rib connecting section is on the extended line of the curved axis of the auxiliary arch rib.

[0014] Furthermore, an auxiliary arch rib closed section is provided between adjacent auxiliary arch ribs near the auxiliary arch rib merging section, and a cable is connected between the curved rod wind brace and the auxiliary arch rib closed section.

[0015] Furthermore, the curved rod wind brace and the cable are anchored by ear plates.

[0016] As a preferred technical solution, an ear hole is opened on the ear plate, and a circle of ear plate reinforcement plates are respectively arranged on both sides of the ear plate around the ear hole.

[0017] Furthermore, the bent rod wind brace is provided with an ear plate partition at the ear plate, the ear plate partition is provided between the top and bottom plates and the web plate, the top and bottom plates are provided with stiffening ribs, the web plate is provided with ear plate transverse stiffening ribs, and ear plate vertical stiffening ribs are provided between the ear plate transverse stiffening ribs;

[0018] The transverse stiffening ribs of the ear plate are arranged at the same position as the stiffening ribs on the partition plate. The transverse stiffening ribs of the ear plate are arranged throughout the length between adjacent web plates. The vertical stiffening ribs of the ear plate are arranged throughout the length between adjacent transverse stiffening ribs of the ear plate to enhance the connection strength at the ear plate.

[0019] As a preferred technical solution, a maintenance manhole is provided on the ear plate partition in the area surrounded by the ear plate transverse stiffening ribs and the ear plate vertical stiffening ribs.

[0020] Furthermore, the cable comprises a flexible parallel steel wire cable, a flexible steel strand cable or a rigid steel rod cable body.

[0021] Furthermore, a transverse connecting brace is provided between the secondary arch rib and the main arch rib, and the axis of the connection between the curved rod wind brace and the secondary arch rib is a straight line, which is consistent with and continuous with the inclination angle of the transverse connecting brace.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] (1) The utility model uses a curved rod wind brace to connect the secondary arch ribs, which solves the problem that the existing arch rib straight rod wind brace uses straight rods as the cross brace structure connecting the arch ribs or the main and secondary arches, and has the problem that the arch shape is relatively rigid and the cross brace shape is difficult to innovate. The shape of the cross brace on the arch can be diversified, which has made a great breakthrough in landscape compared with the traditional straight rod wind brace. At the same time, it improves the lateral stiffness of the secondary arch rib and increases the overall lateral stability of the arch rib;

[0024] (2) The utility model adopts a curved rod wind brace, which is the first application of a curved rod component as a load-bearing wind brace. By cooperating with the tensioned cables, the problem of large deformation of the curved rod after being stressed is innovatively solved. The shape is flexible, which expands the application range of the curved rod;

[0025] (3) The cross-sectional form of the curved rod wind brace in the utility model can be selected into rectangular, polygonal, triangular, circular, elliptical and other forms, which provides a wider space for expanding the landscape shape of the bridge structure;

[0026] (4) The use of the cables in the present invention limits the additional deformation of the curved beam wind brace due to the initial curvature through the change of the cable force, so that the internal force of the curved beam wind brace can be adjusted, and the curved beam wind brace can be stably used in the arch bridge;

[0027] (5) The utility model has smooth force transmission and reasonable and reliable force reception. It also solves technical problems in design and construction. It has strong applicability in the transverse connection of large load-bearing components in bridge structures such as steel towers and steel arches that have landscape innovation requirements, and is conducive to expanding the design space for the shape of bridge structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a cable-type curved rod wind bracing connection structure between the arch ribs of an arch bridge in an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the plan projection structure of the cable-type curved rod wind bracing connection structure between the arch ribs of the arch bridge in the embodiment of the utility model;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the curved rod wind brace including the partition in the embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the first curved rod wind brace in an embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the second curved rod wind brace in the embodiment of the utility model;

[0033] Figure 6 It is a schematic diagram of the cross-sectional structure of the curved rod wind brace including the ear plate partition in the embodiment of the utility model;

[0034] Figure 7 It is a schematic diagram of the cross-sectional structure of the curved rod wind brace including the ear plate partition in the embodiment of the utility model.

[0035] Description of the markings in the figure:

[0036] 1—curved rod wind brace, 11—first curved rod wind brace, 12—second curved rod wind brace, 13—top and bottom plates, 14—web plates, 15—partition plates, 16—stiffening ribs, 17—ear plate partition plates, 18—ear plate transverse stiffening ribs, 19—ear plate vertical stiffening ribs, 2—cables, 3—ear plates, 31—ear plate reinforcement plates, 32—ear holes, 4—auxiliary arch rib closed sections, 5—auxiliary arch ribs, 51—first auxiliary arch ribs, 52—second auxiliary arch ribs, 6—auxiliary arch rib merged sections, 7—auxiliary arch rib connecting sections, 71—first auxiliary arch rib connecting sections, 72—second auxiliary arch rib connecting sections, 8—transverse connecting braces, 9—main arch ribs, 91—first main arch ribs, 92—second main arch ribs. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 the present utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, and only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other manner.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Example:

[0041] A cable-type curved rod wind bracing connection structure between the arch ribs of an arch bridge is applied to the steel arch of the arch bridge to achieve the lateral connection between two or more steel arches, such as Figure 1 and Figure 2 As shown, it includes a curved rod wind brace 1, a cable 2, an auxiliary arch rib 5 and a main arch rib 9, the axis of the main arch rib 9 is a plane curve, the axes of the curved rod wind brace 1 and the auxiliary arch rib 5 are space curves, and the projection on the horizontal plane is an arc curve, one end of the main arch rib 9 intersects at the center of the bridge cross section, and the other end extends to both sides of the bridge cross section, one end of the auxiliary arch rib 5 is connected to the intersection end of the main arch rib 9, and the other end is connected to the extension end of the main arch rib 9, the curved rod wind brace 1 connects adjacent auxiliary arch ribs 5, and cables 2 are connected between adjacent curved rod wind braces 1;

[0042] One end of the secondary arch ribs 5 intersects to form a secondary arch rib merging section 6, the secondary arch rib merging section 6 is connected to the intersecting end of the main arch rib 9, and the other end is connected to the extended end of the main arch rib 9 through the secondary arch rib connecting section 7, and the curve axis of the secondary arch rib connecting section 7 is on the extension line of the curve axis of the secondary arch rib 5;

[0043] A secondary arch rib closed section 4 is provided between adjacent secondary arch ribs 5 near the secondary arch rib merging section 6, and a cable 2 is connected between the curved rod wind brace 1 and the secondary arch rib closed section 4;

[0044] A transverse connecting brace 8 is provided between the secondary arch rib 5 and the main arch rib 9. The axis of the connection between the curved rod wind brace 1 and the secondary arch rib 5 is a straight line, which is consistent with and continuous with the inclination angle of the transverse connecting brace 8.

[0045] The plane projection curve axis of the curved rod wind brace 1 includes a circular arc, a parabola, a high-order parabola, a catenary, a spline curve or a high-order curve, and in this embodiment, a circular arc is preferred;

[0046] The cross-sectional form of the curved rod wind brace 1 includes a rectangle, a polygon, a triangle, a circle or an ellipse, and in this embodiment, a rectangle is preferred;

[0047] The size of the curved rod wind brace 1 can be adjusted;

[0048] The cable 2 includes a flexible parallel steel wire cable, a flexible steel strand cable or a rigid steel rod cable body. In this embodiment, it is preferably a flexible parallel steel wire cable with fork-ear connection at both ends;

[0049] In this embodiment, if Figure 3 As shown, the curved rod wind brace 1 adopts a rectangular thin-walled steel structure section, including a top and bottom plate 13, a web plate 14, a partition plate 15 and a stiffening rib 16. Two web plates 14 are arranged between the two top and bottom plates 13, a partition plate 15 is arranged between the top and bottom plates 13 and the web plates 14, and stiffening ribs 16 are arranged on the top and bottom plates 13 and the web plates 14;

[0050] The cross-section width of the curved rod wind brace 1 is 850 mm, the height is 1000 mm, the thickness of the top and bottom plates 13, the web plate 14 and the partition plate 15 is 24 mm, the length of the stiffening rib 16 is 140 mm, and the thickness is 12 mm;

[0051] A stiffening rib 16 is provided on each of the top and bottom plates 13, the distance between the stiffening rib 16 and the web 14 is 400 mm, and the distance between the web 14 and the end side of the top and bottom plates 13 is 25 mm;

[0052] Two stiffening ribs 16 are respectively arranged on the web 14 , the distance between adjacent stiffening ribs 16 is 330 mm, and the distance between the stiffening rib 16 and the top and bottom plates 13 is 335 mm.

[0053] The cross-sectional form of the curved rod wind bracing 1 is selected to be rectangular. On the one hand, this is because the rectangular cross-sectional torsional inertia moment is larger and provides stronger torsional resistance. At the same time, the rectangular cross-sectional ability to resist out-of-plane forces is stronger. Because of its own strong bending and torsional resistance, it can withstand a certain load. On the other hand, after the rectangular top and bottom plates 13 and web plates 14 are connected to the auxiliary arch ribs 5, they correspond one-to-one with the top and bottom plates and web plates of the transverse connecting brace 8, so the force transmission is more direct and efficient.

[0054] In this embodiment, the curved rod wind brace 1 includes a first curved rod wind brace 11 and a second curved rod wind brace 12. The plane projection curve axis of the curved rod wind brace 1 is in the form of an arc line, and the axis of the connection between the curved rod wind brace 1 and the auxiliary arch rib 5 is in the form of a straight line. Figure 4 As shown, the radius of the curve axis of the first curved rod wind brace 11 is 4000mm, and the angle is 104°. The first curved rod wind brace 11 is symmetrically provided with three partitions 15 on both sides of the road centerline. The distance between the partitions 15 on the curve axis of the first curved rod wind brace 11 is 1100mm. The distance between the outermost partition 15 and the auxiliary arch rib 5 on the axis of the connection between the first curved rod wind brace 11 and the auxiliary arch rib 5 is 926mm. The connection between the first curved rod wind brace 11 and the auxiliary arch rib 5 is provided with a chamfer with a radius of 100mm on the side with a small angle, and a chamfer with a radius of 800mm on the side with a large angle.

[0055] like Figure 5 As shown, the radius of the curve axis of the second curved wind brace 12 is 8000mm, the angle is 102.7°, the second curved wind brace 12 is symmetrically provided with four partitions 15 on both sides of the road centerline, the distance between the partitions 15 on the curve axis of the second curved wind brace 12 is 1400mm, the distance between the outermost partition 15 and the auxiliary arch rib 5 on the axis of the connection between the second curved wind brace 12 and the auxiliary arch rib 5 is 860mm, the connection between the second curved wind brace 12 and the auxiliary arch rib 5 is provided with a chamfer with a radius of 100mm on the side with a small angle, and a chamfer with a radius of 800mm on the side with a large angle. The form of the curve axis can be adjusted according to the needs of the appearance.

[0056] The plane projection curved axis of the curved rod wind brace 1 and the axis of the connection between the curved rod wind brace 1 and the auxiliary arch rib 5 are composed of a multi-segment line composed of a middle arc line and two end straight lines. The curved axis of the curved rod wind brace 1 adopts an arc line to make the shape more beautiful; the axis of the connection between the curved rod wind brace 1 and the auxiliary arch rib 5 is consistent with and continuous with the inclination angle of the transverse connecting diagonal brace 8 (the angle between the axis of the connection between the curved rod wind brace 1 and the auxiliary arch rib 5 and the auxiliary arch rib 5 is 46°, which is consistent with the angle between the transverse connecting diagonal brace 8 and the auxiliary arch rib 5), and the force can be directly transmitted to the transverse connecting diagonal brace 8 without generating additional force on the auxiliary arch rib 5. The angle between the axis of the connection between the curved rod wind brace 1 and the first auxiliary arch rib 51 and the second auxiliary arch rib 52 is 104°.

[0057] In this embodiment, a cable 2 is provided at the end of the curved rod wind brace 1 with the largest curvature, and the curved rod wind brace 1 and the cable 2 are hingedly anchored by an ear plate 3. Figure 6 and Figure 7 As shown, the bent rod wind brace 1 is provided with an ear plate partition 17 at the ear plate 3, the ear plate partition 17 is provided between the top and bottom plates 13 and the web plate 14, the top and bottom plates 13 are provided with stiffening ribs 16, the web plate 14 is provided with ear plate transverse stiffening ribs 18, and ear plate vertical stiffening ribs 19 are provided between the ear plate transverse stiffening ribs 18;

[0058] The transverse stiffening ribs 18 of the ear plate are arranged at the same position as the stiffening ribs 16 on the partition plate 15. The transverse stiffening ribs 18 of the ear plate are arranged between adjacent web plates 14. The vertical stiffening ribs 19 of the ear plate are arranged between adjacent transverse stiffening ribs 18 of the ear plate to strengthen the connection strength at the ear plate 3.

[0059] The length of the transverse stiffening rib 18 of the ear plate is 160 mm, the thickness is 16 mm, the length of the vertical stiffening rib 19 of the ear plate is 140 mm, the thickness is 16 mm, the distance between adjacent vertical stiffening ribs 19 of the ear plate is 450 mm, and the distance between the vertical stiffening ribs 19 of the ear plate and the web plate 14 is 175 mm;

[0060] An inspection manhole is provided on the ear plate partition 17 in the area surrounded by the ear plate transverse stiffening ribs 18 and the ear plate vertical stiffening ribs 19. The inspection manhole is located at the center of the ear plate partition 17. The length of the inspection manhole is 400 mm, the distance between the edge and the ear plate vertical stiffening ribs 19 is 25 mm, the width is 280 mm, and the distance between the edge and the ear plate transverse stiffening ribs 18 is 25 mm.

[0061] An ear hole 32 is provided on the ear plate 3. Both the ear plate 3 and the ear hole 32 are located on the central axis of the web 14. A circle of ear plate reinforcing plates 31 are provided on both sides of the ear plate 3 around the ear hole 32. The ear plate 3 has a thickness of 24 mm, a diameter of the ear hole 32 is 102 mm, and a distance between the ear plate 3 and the web 14 is 210 mm. The diameter of the ear plate reinforcing plate 31 is 300 mm and the thickness is 20 mm.

[0062] The radius of the arc segment of the ear plate 3 is 175 mm, the angle between the straight segment of the ear plate 3 and the web 14 is 65°, the thickness of the base of the ear plate 3 is 20 mm, and a chamfer with a radius of 50 mm is provided at the connection with the straight segment;

[0063] The outer diameter of the cable 2 is 72 mm, and the tension force is 124.1 t.

[0064] On the one hand, the cable 2 can limit the problem of large deformation of the curved bar wind brace 1 after being subjected to force due to its own initial bending shape. On the other hand, it can adjust the internal force of the curved bar wind brace 1 by adjusting the cable force, further improve the constraint conditions of the curved bar wind brace 1, and significantly improve the phenomenon that the curved bar wind brace 1 has large deformation and reduced bearing capacity after being subjected to force.

[0065] In this embodiment, the cross-section of the secondary arch rib closed section 4 adopts an I-shaped cross-section, which is composed of upper and lower top and bottom plates. At the position of the ear plate 3 where the cable 2 is required, the cross-section is adjusted to an I-shaped cross-section. A web is provided between the two top and bottom plates to transmit the force on the cable ear plate to the I-shaped top and bottom plates, and to the secondary arch rib 5 and the secondary arch rib merging section 6.

[0066] The length of the secondary arch rib closed section 4 is 27600mm, the minimum width is 300mm, the maximum width is 3562mm, and the height is 1000mm. The minimum width of the top and bottom plates is 300mm, the maximum width is 3562mm, and the thickness is 24mm. The height of the web is 1000mm and the thickness is 24mm.

[0067] The auxiliary arch rib closed section 4 is mainly used to connect the cable 2 with the auxiliary arch rib merge section 6 to provide a connecting transition section; at the same time, the cable 2 is also connected to the auxiliary arch rib 5, and an ear plate 3 is provided for connecting the cable 2, transmitting the force on the cable 2 to the auxiliary arch rib 5, and also transmitting the balancing force to the auxiliary arch rib merge section 6.

[0068] In this embodiment, the secondary arch rib 5 adopts an octagonal cross section, which has a larger torsional inertia moment and provides a stronger torsional resistance. At the same time, the closed cross section has a strong ability to resist external forces. It is more beautiful in shape than the commonly used rectangular cross section because there are four more sections. The cross section appears lighter and more agile when observed with the naked eye.

[0069] The height of the section of the secondary arch rib 5 varies from 2000-2500mm at the arch crown to the middle arch to the arch foot, the width is 1200mm, the thickness is 36-40mm, and the size of the section is determined according to the force.

[0070] In this embodiment, the transverse connecting brace 8 has a rectangular cross section, a straight axis, an angle of 46° between the secondary arch rib 5, and is arranged in an inclined array between the main arch rib 9 and the secondary arch rib 5;

[0071] The height of the cross-section of the horizontal connecting brace 8 is 1000mm and the width is 850mm.

[0072] The transverse connecting brace 8 serves to connect the main arch rib 9 and the auxiliary arch rib 5, thereby increasing the connection between the main arch rib 9 and the auxiliary arch rib 5 and providing the out-of-plane stability of the arch rib.

[0073] In this embodiment, the main arch rib 9 adopts an octagonal cross section, which has a larger torsional inertia moment and provides a stronger torsional resistance. At the same time, the closed cross section has a strong ability to resist external forces. It is more beautiful in shape than the commonly used rectangular cross section. Because there are four more sections, the cross section appears lighter and more agile when observed with the naked eye.

[0074] The height of the main arch rib 9 section varies from 3500-5000mm from the arch top to the middle arch foot, and from 3500-6000mm from the arch top to the side arch foot. The width is 2800mm and the thickness is 36-40mm. The size of the section is determined according to the force.

[0075] In this embodiment, the secondary arch rib 5 includes a first secondary arch rib 51 and a second secondary arch rib 52. The structures of the first secondary arch rib 51 and the second secondary arch rib 52 are completely consistent and symmetrically arranged along the center line of the road. The central axis of the secondary arch rib 5 is completely consistent with the projection of the central axis of the main arch rib 9 on the bridge facade. In the vertical plane projection of the bridge, the central axis of the secondary arch rib 5 is a cubic curve. In the horizontal plane projection, the arch axis of the secondary arch rib 5 is an arc curve, which deviates from the projection of the arch axis of the main arch rib 9 on the horizontal plane.

[0076] The main arch rib 9 includes a first main arch rib 91 and a second main arch rib 92. The structures of the first main arch rib 91 and the second main arch rib 92 are completely identical and are symmetrically arranged along the center line of the road. In the vertical plane projection of the bridge, the arch axis of the main arch rib 9 is a cubic curve. The projection of the arch axis of the main arch rib 9 on a plane perpendicular to the plane where the main arch rib 9 is located is an arc curve. The plane where the axis of the main arch rib 9 is located and the plumb plane where the middle arch foot and the side arch are connected is 5.49°, and is inclined outward.

[0077] The auxiliary arch rib connecting section 7 includes a first auxiliary arch rib connecting section 71 and a second auxiliary arch rib connecting section 72. The first auxiliary arch rib connecting section 71 connects the extended ends of the first auxiliary arch rib 51 and the first main arch rib 91, and the second auxiliary arch rib connecting section 72 connects the extended ends of the second auxiliary arch rib 52 and the second main arch rib 92.

[0078] Unless otherwise specified, the above dimensions are measured based on the axis of the structure. Rigid welding is used to connect the steel structures such as the curved rod wind bracing 1, the auxiliary arch rib 5, the transverse connecting brace 8 and the main arch rib 9.

[0079] The drawings only represent the arrangement of the structures and are not necessarily related to the actual dimensions.

[0080] The curved bar wind brace 1 of this embodiment connects two auxiliary arch ribs 5 laterally together, thereby improving the lateral static and dynamic stability of the auxiliary arch ribs 5. Since the axis of the curved bar wind brace 1 is in a curved form, after being pulled, the curved bar wind brace 1 will produce a large deformation toward the middle of the center of the circle. The deformation is large, and the structural stiffness along this direction is very small, which weakens its force-bearing capacity. In order to improve the compression, tension and bending-torsion stiffness of the curved bar wind brace 1 in the bending plane where the arc is located, the tensioned cable 2 is connected to the curved bar wind brace 1 through the ear plate 3. The tensioned cable 2 can fully limit the deformation of the curved bar wind brace 1 after being pulled. When the curved bar wind brace 1 is deformed by force, the cable 2 provides stiffness at the maximum curvature of the arc of the curved bar wind brace 1 to limit the deformation and internal force of the curved bar wind brace 1 after being pulled, thereby solving the problem of small stiffness and large deformation of the curved bar wind brace 1 in the bending plane, thereby making it possible for the curved bar wind brace 1 to be used as a wind bracing structure, which not only solves the force problem but also achieves great innovation in shape.

[0081] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge, characterized in that: The structure comprises a curved rod wind brace (1), a cable (2), an auxiliary arch rib (5) and a main arch rib (9); the axis of the main arch rib (9) is a plane curve; the axes of the curved rod wind brace (1) and the auxiliary arch rib (5) are space curves, and the projections on the horizontal plane are arc curves; one end of the main arch rib (9) intersects at the center of the bridge cross section, and the other end extends to both sides of the bridge cross section; one end of the auxiliary arch rib (5) is connected to the intersection end of the main arch rib (9), and the other end is connected to the extension end of the main arch rib (9); the curved rod wind brace (1) connects adjacent auxiliary arch ribs (5), and cables (2) are connected between adjacent curved rod wind braces (1).

2. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: The plane projection curve axis form of the curved rod wind brace (1) includes a circular arc, a parabola, a high-order parabola, a catenary, a spline curve or a high-order curve.

3. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: The cross-sectional shape of the curved rod wind brace (1) includes a rectangular, polygonal, triangular, circular or elliptical shape.

4. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: The curved rod wind brace (1) comprises a top and bottom plate (13), a web plate (14), a partition plate (15) and a stiffening rib (16); the web plate (14) is arranged between the top and bottom plates (13); the partition plate (15) is arranged between the top and bottom plates (13) and the web plate (14); and the stiffening rib (16) is arranged on the top and bottom plates (13) and the web plate (14).

5. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: One end of the secondary arch ribs (5) intersects to form a secondary arch rib merging section (6), which is connected to the intersecting end of the main arch ribs (9), and the other end is connected to the extended end of the main arch ribs (9) through the secondary arch rib connecting section (7), and the curved axis of the secondary arch rib connecting section (7) is located on the extended line of the curved axis of the secondary arch ribs (5).

6. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 5, characterized in that: An auxiliary arch rib closed section (4) is provided between adjacent auxiliary arch ribs (5) near the auxiliary arch rib merging section (6), and a cable (2) is connected between the curved rod wind brace (1) and the auxiliary arch rib closed section (4).

7. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: The curved rod wind brace (1) and the cable (2) are anchored via ear plates (3).

8. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 7, characterized in that: The bent rod wind brace (1) is provided with an ear plate partition (17) at the ear plate (3), and the ear plate partition (17) is arranged between the top and bottom plates (13) and the web plate (14); the top and bottom plates (13) are provided with stiffening ribs (16); the web plate (14) is provided with ear plate transverse stiffening ribs (18); and ear plate vertical stiffening ribs (19) are arranged between the ear plate transverse stiffening ribs (18); The ear plate transverse stiffening ribs (18) and the stiffening ribs (16) on the partition (15) are arranged at the same position, the ear plate transverse stiffening ribs (18) are arranged between adjacent webs (14), and the ear plate vertical stiffening ribs (19) are arranged between adjacent ear plate transverse stiffening ribs (18).

9. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: The cable (2) comprises a flexible parallel steel wire cable, a flexible steel strand cable or a rigid steel rod cable body.

10. The cable-type curved rod wind bracing connection structure between arch ribs of an arch bridge according to claim 1, characterized in that: A transverse connecting brace (8) is provided between the secondary arch rib (5) and the main arch rib (9); the axis of the connection between the curved rod wind brace (1) and the secondary arch rib (5) is a straight line, which is consistent with and continuous with the inclination angle of the transverse connecting brace (8).

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