CN220413979U - Conversion connection structure of polygon arch rib-rectangular arch rib - Google Patents
Conversion connection structure of polygon arch rib-rectangular arch rib Download PDFInfo
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- CN220413979U CN220413979U CN202321836003.XU CN202321836003U CN220413979U CN 220413979 U CN220413979 U CN 220413979U CN 202321836003 U CN202321836003 U CN 202321836003U CN 220413979 U CN220413979 U CN 220413979U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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Abstract
The utility model relates to a conversion connection structure of a polygonal arch rib and a rectangular arch rib, which solves the problems that the welding connection structure of the polygonal arch rib and a bridge deck beam plate is large in engineering quantity, difficult to ensure welding quality and low in shearing resistance. The device comprises a rectangular arch rib, a top plate and a bottom plate, wherein the top plate and the bottom plate of the rectangular arch rib are respectively provided with a continuous plate, the continuous plates are arranged over a bearing plate, the side surfaces of the rectangular arch rib are first webs in a plane, the side surfaces of the polygonal arch rib are second webs with folding surfaces, the first webs and the second webs are cut off at the bearing plate and are respectively welded with the two side surfaces of the bearing plate, a plurality of first stiffening plates are arranged on one side of the bearing plate, facing the rectangular arch rib, of the bearing plate, and the first stiffening plates are consistent in number and aligned with the second webs one by one. The utility model converts the polygon arch rib into the rectangular arch rib in the arch leg section, and the design of the joint of the arch leg and the beam plate can adopt an integral node plate structure when the polygon arch rib is used in the arch rib main body, so that the integral node plate structure scheme is mature, and the stress transmission reliability is good.
Description
Technical Field
The utility model belongs to the field of bridge structures, relates to an arch rib supporting structure of an arch bridge, and in particular relates to a conversion connection structure of a polygonal arch rib and a rectangular arch rib.
Background
In the existing steel box arch rib arch bridge design, in order to increase the landscape effect of the arch bridge, the section of the arch rib is often designed into a polygon, such as six deformations. The adoption of such polygonal cross-section ribs does not add difficulty to the design, fabrication, connection of the ribs to the braces, etc. of the ribs from the arch to the dome portion, as compared to conventional rectangular cross-section ribs.
However, at the rib, stringer connection, the polygonal rib is not able to connect the rib to the stringer using gusset plates as compared to the rectangular rib. The prior polygonal arch rib is generally cut off at the bridge deck top plate and welded with the arch rib, stiffening transition is arranged on the arch rib at the arch foot, and a partition plate or stiffening plate is also arranged in the bridge deck top plate lower longitudinal beam corresponding to the arch rib so as to adapt to the requirement of continuous stress transmission and reduce stress concentration. The arch rib section is broken at the girder top plate and is welded with the girder top plate in a penetration way. The connecting mode has the advantages that the welding workload at the joint surface of the arch rib and the longitudinal beam top plate is large, and the welding quality is difficult to ensure. In addition, the arch rib generates horizontal force to two sides of the bridge after being acted by bridge deck load of the bridge span, the horizontal force is converted into horizontal shearing force of the interface at the junction of the arch rib and the bridge deck, namely, the penetration butt welding seam of the arch rib and the top plate bears the shearing force, and the shearing capacity of the penetration butt welding seam is relatively low. Lamellar tearing of the deck roof may also result under horizontal shear forces at the rib and deck roof, which will also increase the material requirements of the stringer roof.
Disclosure of Invention
The utility model mainly solves the problems that a polygonal arch rib and a longitudinal beam cannot be connected by adopting a node plate, and is generally cut off and welded at the top plate of a bridge deck beam plate, the engineering quantity is large, the welding quality is difficult to ensure, and the shearing resistance is lower.
The aim of the utility model is mainly achieved by the following scheme: the switching connection structure of the polygon arch rib and the rectangular arch rib comprises a vault area and an arch foot area, wherein the polygon arch rib is arranged from the upper section of the arch foot area to the vault area, the rectangular arch rib is arranged at the lower section of the arch foot area, the arch axes of the rectangular arch rib and the polygon arch rib are aligned, and a bearing plate is arranged at the butt joint end face of the rectangular arch rib and the polygon arch rib; the top plate of the rectangular arch rib is coplanar with the top plate of the polygonal arch rib, the bottom plate of the rectangular arch rib is coplanar with the bottom plate of the polygonal arch rib, the top plates and the bottom plates of the rectangular arch rib and the polygonal arch rib both adopt continuous plates to cross the bearing plate, the side surface of the rectangular arch rib is a first web plate with a plane, the side surface of the polygonal arch rib is a second web plate with a folded surface, the first web plate outline is positioned at the outer side of the second web plate outline, the first web plate and the second web plate are cut off at the bearing plate and are respectively welded with the two side surfaces of the bearing plate, a plurality of first stiffening plates are welded at the inner side of the first web plate towards one side of the rectangular arch rib, and the first stiffening plates and the second web plates are consistent in number and are aligned one by one.
The top plate of the rectangular arch rib and the polygonal arch rib are provided with a coplanar top plate and a coplanar bottom plate, so that continuous plates can be adopted on the top plate and the bottom plate surfaces, and the continuous plates can directly pass through the bearing plates without being broken; the side surface of the rectangular arch rib is a first web plate with a plane, and the side surface of the polygonal arch rib is a second web plate with a folded surface, so that the first web plate and the second web plate are not coplanar, a mode of welding the two sides of the bearing plate is adopted to realize the conversion of the cross section, the profile of the first web plate is ensured to wrap the outer side of the second web plate, and a first stiffening plate aligned with the second web plate can be arranged on the inner side of the first web plate to ensure the continuity of stress transmission. The device converts the polygon arch rib into the rectangular arch rib at the arch leg section, the arch rib main body converts the polygon arch rib which is more suitable for landscapes into the rectangular arch rib at the arch leg, the design of the joint of the arch leg and the beam plate can adopt an integral node plate structure, the integral node plate structure scheme is mature, and the stress transmission reliability is good.
Preferably, the two ends of the first stiffening plate are respectively and fixedly supported, the end part of the first stiffening plate is fixed by one of the following two connecting modes,
the first connection mode is as follows: the end parts of the first stiffening plates are welded and fixed with the top plate, the bottom plate or the first web plate of the rectangular arch rib;
and the connection mode II is as follows: the first stiffening plate is close to tip department and sets up the second stiffening plate, and first stiffening plate and second stiffening plate intersection welded fastening, second stiffening plate both sides weld in rectangle arch rib both sides first web, and the tip and the bearing plate welding of second stiffening plate. The end parts of the first stiffening plates can be directly welded with the top plate and the web plates, and the second stiffening plates crossing the web plates at two sides can be used for fixing, so that the stability of stress transmission is ensured.
Preferably, the second stiffening plate is a U-shaped plate, and the opening side of the second stiffening plate faces away from the bearing plate.
Preferably, the inner sides of the top plate, the bottom plate and the second web plate of the polygonal arch rib are uniformly welded with a third stiffening plate, and the end face of the third stiffening plate is welded with the bearing plate.
Preferably, a third stiffening plate is welded on the top plate, the bottom plate and the inner side of the second web plate of the rectangular arch rib.
Preferably, the rectangular arch rib is provided with a fourth stiffening plate at the corner position close to the rectangle, the fourth stiffening plate is of a T-shaped section, and the inward extending length of the fourth stiffening plate is larger than that of the third stiffening plate.
Preferably, the width of the top plate of the rectangular arch rib is larger than that of the top plate of the polygonal arch rib, and the top plate of the rectangular arch rib and the top plate of the polygonal arch rib adopt chamfer bevel edges to realize uniform transition of the cross sections; the width of the bottom plate of the rectangular arch rib is larger than that of the bottom plate of the polygonal arch rib, and the bottom plates of the rectangular arch rib and the polygonal arch rib adopt chamfer oblique sides to realize uniform transition of cross sections. The top plate and the bottom plate adopt continuous plates with uniform and excessive variable cross sections, and stress concentration at the variable cross sections is reduced.
The utility model converts the polygon arch rib into the rectangular arch rib at the arch leg section, and converts the polygon arch rib which is more suitable for the landscape into the rectangular arch rib at the arch leg when the arch rib main body is used, so that the design of the joint of the arch leg and the beam slab can adopt an integral node plate structure, the integral node plate structure scheme is mature, and the stress transmission reliability is good.
Drawings
The utility model is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of an arch bridge structure according to the present utility model.
Fig. 2 is an elevation view of a polygon-to-rectangular rib transition joint of the present utility model.
Fig. 3 is a view A-A of fig. 2 in accordance with the present utility model.
Fig. 4 is a cross-sectional view of one side of the polygonal arch rib of the present utility model.
Fig. 5 is a cross-sectional view of one side of a rectangular rib of the present utility model.
Fig. 6 is a sectional view of the B-B of fig. 5 in accordance with the present utility model.
FIG. 7 is a cross-sectional view of the C-C of FIG. 5 in accordance with the present utility model.
Illustration of: 1. arch rib, 2, arch foot area, 3, vault area, 4, conversion connection structure, 5, beam slab, 6, rectangle arch rib, 7, polygon arch rib, 8, bearing plate, 9, roof, 10, bottom plate, 11, first web, 12, second web, 13, first stiffening plate, 14, second stiffening plate, 15, third stiffening plate, 16, fourth stiffening plate.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Examples: a switching connection structure of a polygonal arch rib-rectangular arch rib is shown in figure 1. The arch bridge in the embodiment is a single-span 128m lower-bearing type simply supported tied arch bridge, the arch rib is inclined inwards by 13 degrees, the section of the arch rib 1 from the upper section of the arch foot area 2 to the arch crown area 3 is a polygonal arch rib 7, the polygonal arch rib 7 adopts a hexagonal steel box structure, the lower section of the arch foot area 2 adopts a rectangular arch rib 6, and the arch bridge is of a rectangular steel box structure; the bridge deck system is provided with rectangular box type longitudinal beam plates 5 along the whole length of the main bridge at positions corresponding to the inclined planes of the arch ribs. As shown in fig. 1, a polygonal rib-rectangular rib transition structure 4 is provided in the rib region. The conversion connecting structure 4 is arranged at a position about 5m from the arched girder intersection.
The concrete structure of the conversion connecting structure 4 is shown in fig. 2-3, the arch axes of the rectangular arch rib 6 and the polygonal arch rib 7 are aligned, and the butt joint end surfaces of the rectangular arch rib and the polygonal arch rib are provided with bearing plates 8. The top plate of the rectangular arch rib 6 is coplanar with the top plate 9 of the polygonal arch rib, the bottom plate of the rectangular arch rib is coplanar with the bottom plate 10 of the polygonal arch rib, and the top plate and the bottom plate of the rectangular arch rib and the polygonal arch rib both adopt continuous plates to pass through the bearing plate 8. As shown in fig. 3, the width of the top plate of the rectangular arch rib 6 is larger than that of the top plate of the polygonal arch rib 7, and the top plate of the rectangular arch rib and the top plate of the polygonal arch rib adopt chamfer bevel edges to realize uniform transition of the cross sections; the width of the bottom plate of the rectangular arch rib is larger than that of the bottom plate of the polygonal arch rib, and the bottom plates of the rectangular arch rib and the polygonal arch rib adopt chamfer oblique sides to realize uniform transition of cross sections.
The side of the rectangular arch rib 6 is a first web 11 with a plane, the side of the polygonal arch rib 7 is a second web 12 with a folded surface, as shown in fig. 4-5, the outline of the first web 11 is positioned outside the outline of the second web 12, and the first web 11 and the second web 12 are cut off at the bearing plate 8 and welded with the two side surfaces of the bearing plate respectively. The inner sides of the top plate, the bottom plate and the second web plate of the polygonal arch rib 7 are uniformly welded with a third stiffening plate 15, and the end face of the third stiffening plate 15 is welded with the bearing plate 8. The inner sides of the top plate, the bottom plate and the second web plate of the rectangular arch rib 6 are welded with a third stiffening plate 15. As shown in fig. 7, the rectangular arch rib is provided with a fourth stiffening plate 16 near the corner of the rectangle, the fourth stiffening plate 16 is T-shaped in cross section, and the length of inward extension of the fourth stiffening plate 16 is greater than that of the third stiffening plate 15.
Four first stiffening plates 13 are welded on the inner side of the first web plate on one side of the bearing plate, which faces the rectangular arch rib, and the first stiffening plates 13 and the second web plates are consistent in number and aligned one by one. As shown in fig. 5, one end of the first stiffening plate 13 is welded and fixed with the top plate or the bottom plate, the other end of the first stiffening plate 13 is provided with a second stiffening plate near the end, the intersection of the first stiffening plate and the second stiffening plate is welded and fixed, two sides of the second stiffening plate 14 are welded on the first webs 11 at two sides of the rectangular arch rib, and the end of the second stiffening plate 14 is welded with the bearing plate 8. As shown in fig. 6, the second stiffening plate 14 is a U-shaped plate, and the open side of the second stiffening plate faces away from the bearing plate 8.
The device converts the polygon arch rib into the rectangular arch rib at the arch leg section, the arch rib main body converts the polygon arch rib which is more suitable for landscapes into the rectangular arch rib at the arch leg, the design of the joint of the arch leg and the beam plate can adopt an integral node plate structure, the integral node plate structure scheme is mature, and the stress transmission reliability is good.
Claims (7)
1. The utility model provides a conversion connection structure of polygon arch rib-rectangle arch rib, the arch rib includes vault district and arch foot district, its characterized in that: the upper section of the arch foot area to the arch crown area are polygonal arch ribs, the lower section of the arch foot area is rectangular arch ribs, the arch axes of the rectangular arch ribs and the polygonal arch ribs are aligned, and bearing plates are arranged on the butt joint end surfaces of the rectangular arch ribs and the polygonal arch ribs; the top plate of the rectangular arch rib is coplanar with the top plate of the polygonal arch rib, the bottom plate of the rectangular arch rib is coplanar with the bottom plate of the polygonal arch rib, the top plates and the bottom plates of the rectangular arch rib and the polygonal arch rib both adopt continuous plates to cross the bearing plate, the side surface of the rectangular arch rib is a first web plate with a plane, the side surface of the polygonal arch rib is a second web plate with a folded surface, the first web plate outline is positioned at the outer side of the second web plate outline, the first web plate and the second web plate are cut off at the bearing plate and are respectively welded with the two side surfaces of the bearing plate, a plurality of first stiffening plates are welded at the inner side of the first web plate towards one side of the rectangular arch rib, and the first stiffening plates and the second web plates are consistent in number and are aligned one by one.
2. The switching connection structure of polygonal rib-rectangular rib according to claim 1, wherein: the two ends of the first stiffening plate are respectively and fixedly supported, the end part of the first stiffening plate is fixed by one of the following two connecting modes,
the first connection mode is as follows: the end parts of the first stiffening plates are welded and fixed with the top plate, the bottom plate or the first web plate of the rectangular arch rib;
and the connection mode II is as follows: the first stiffening plate is close to tip department and sets up the second stiffening plate, and first stiffening plate and second stiffening plate intersection welded fastening, second stiffening plate both sides weld in rectangle arch rib both sides first web, and the tip and the bearing plate welding of second stiffening plate.
3. The switching connection structure of polygonal rib-rectangular rib according to claim 2, wherein: the second stiffening plate adopts a U-shaped plate, and the opening side of the second stiffening plate faces back to the bearing plate.
4. A polygon-rib-rectangular rib conversion interface as claimed in claim 1 or 2 or 3, wherein: and third stiffening plates are uniformly welded on the top plate, the bottom plate and the inner sides of the second webs of the polygonal arch ribs, and the end faces of the third stiffening plates are welded with the bearing plates.
5. A polygon-rib-rectangular rib conversion interface as claimed in claim 1 or 2 or 3, wherein: and a third stiffening plate is welded on the inner sides of the top plate, the bottom plate and the second web plate of the rectangular arch rib.
6. The switching connection structure of polygonal rib-rectangular rib according to claim 5, wherein: and a fourth stiffening plate is arranged at the corner position of the rectangular arch rib, which is close to the rectangle, the fourth stiffening plate is of a T-shaped section, and the inward extending length of the fourth stiffening plate is larger than that of the third stiffening plate.
7. A polygon-rib-rectangular rib conversion interface as claimed in claim 1 or 2 or 3, wherein: the width of the top plate of the rectangular arch rib is larger than that of the top plate of the polygonal arch rib, and the cross section of the top plate of the rectangular arch rib and the cross section of the top plate of the polygonal arch rib are uniformly transited by adopting a chamfer bevel edge; the width of the bottom plate of the rectangular arch rib is larger than that of the bottom plate of the polygonal arch rib, and the bottom plates of the rectangular arch rib and the polygonal arch rib adopt chamfer oblique sides to realize uniform transition of cross sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321836003.XU CN220413979U (en) | 2023-07-13 | 2023-07-13 | Conversion connection structure of polygon arch rib-rectangular arch rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321836003.XU CN220413979U (en) | 2023-07-13 | 2023-07-13 | Conversion connection structure of polygon arch rib-rectangular arch rib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220413979U true CN220413979U (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321836003.XU Active CN220413979U (en) | 2023-07-13 | 2023-07-13 | Conversion connection structure of polygon arch rib-rectangular arch rib |
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| Country | Link |
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| CN (1) | CN220413979U (en) |
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2023
- 2023-07-13 CN CN202321836003.XU patent/CN220413979U/en active Active
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