CN220867953U - Hollow-out top basket arch bridge structure - Google Patents
Hollow-out top basket arch bridge structure Download PDFInfo
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- CN220867953U CN220867953U CN202322688885.6U CN202322688885U CN220867953U CN 220867953 U CN220867953 U CN 220867953U CN 202322688885 U CN202322688885 U CN 202322688885U CN 220867953 U CN220867953 U CN 220867953U
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- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000035939 shock Effects 0.000 description 2
- 241000202296 Delphinium Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a hollowed-out top basket arch bridge structure. The existing basket arch bridge structure has the problems of limited space above the bridge deck, poor wind resistance and the like. The structure comprises arch ribs, oval hollowed-out connecting struts and inhaul cables; the arch ribs are positioned at two sides of the bridge deck and slightly incline to the line center line, and the oval hollowed-out connecting support is connected between the tops of the arch ribs at the two sides; vertical inhaul cables are arranged between the arch ribs and the bridge deck below. The utility model optimizes the structural system of the top arch rib connecting area, the arch ribs on two sides are transversely connected through the elliptical hollow connecting support, the inclination of the arch ribs is reasonable, the space above the bridge deck is enlarged, and the utility model is suitable for the condition that the inward inclination requirements of the two arch ribs are smaller; under the premise of considering space, the oval hollow connection support of the arch rib connection area can effectively reduce the weight and wind resistance of the top structure, increase the rigidity and stability of the arch rib connection area, reduce the stress and deformation of the arch rib and the bridge deck, and effectively prolong the service life of the bridge.
Description
Technical Field
The utility model relates to the technical field of bridge engineering, in particular to a hollow-out top basket arch bridge structure.
Background
The basket arch bridge is a middle-bearing arch bridge, and its main structural characteristics include bridge deck and arch rib consolidation, the arch rib is inclined inwards, and all structures form a space structure similar to that of basket. The basket arch bridge has good mechanical properties and is suitable for crossing large river, lake or valley and other areas with complex terrains.
The basket arch bridge is widely applied in engineering at present, but the top arch rib connecting area of the prior basket arch bridge has some defects in structure and stress. Chinese patent CN202022116834.2 discloses a basket arch bridge top structure comprising two arch ribs which are inclined relatively and are fixedly connected to the bridge deck, wherein the tops of the arch ribs are connected together by adopting a cross brace to form an arch rib connecting region. Although the rigidity and the stability of the arch rib connecting area can be increased, the length of the transverse brace is shorter, the arch ribs are greatly inclined to the line center line, and the structure is only suitable for the condition that the inward inclination of the two arch ribs is larger, and the space above the bridge deck is smaller. Chinese patent CN201922082881.7 discloses a delphinium arch bridge structure, which comprises two arch ribs perpendicular to the bridge deck, wherein the tops of the arch ribs are connected together by adopting a plurality of cross braces with rectangular cross sections, so as to form an arch rib connecting area. Although the rigidity and the stability of the arch rib connecting area can be increased, the arch rib is completely and vertically constructed, and the wind resistance performance is poor.
Therefore, there is a need to design new basket arch bridge structures, optimize arch rib connection area structures, and overcome the above-mentioned drawbacks.
Disclosure of Invention
The utility model aims to provide a hollowed-out top basket arch bridge structure, which aims to solve the problems of limited space above a bridge deck, poor wind resistance and the like of the existing structure.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The hollow-out top basket arch bridge structure comprises arch ribs, oval hollow-out connecting supports and inhaul cables;
The arch ribs are positioned on two sides of the bridge deck and slightly incline to the line center line, and the oval hollowed connecting support is connected between the tops of the arch ribs on the two sides;
and a vertical inhaul cable is arranged between the arch rib and the bridge deck below.
Further, the oval hollow connecting support comprises a steel arc plate, and an oval hollow is arranged in the middle of the steel arc plate.
Further, the two longitudinal sides of the steel arc plate are concave inwards to form parabolic edges.
Further, a plurality of transverse cross braces are arranged below the steel arc plates, and the transverse two ends of each cross brace are connected to the inner sides of the arch ribs on the two sides.
Further, a longitudinal brace is connected between the adjacent transverse braces close to the parabolic edge, and a first inclined brace and a second inclined brace which are symmetrical to each other are arranged on two sides of the longitudinal brace.
Further, a third diagonal brace is arranged between the transverse brace at the outermost side in the longitudinal direction and the arch ribs at the two sides.
Further, the arch rib is a variable cross-section rib.
Further, the longitudinal two ends of the arch rib are variable-section arch leg sections, and the sections of the variable-section arch leg sections gradually decrease from the end parts to the inside.
Further, the longitudinal middle part of the arch rib is a constant section, the constant section transversely corresponds to the elliptical hollow, and the section of the constant section is unchanged along the length of the constant section.
Further, the rib between the variable cross-section rib segment and the constant cross-section segment is a variable cross-section segment, and the cross-section of the variable cross-section segment gradually becomes smaller from the variable cross-section rib segment to the constant cross-section segment.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides a hollowed-out top basket arch bridge structure, which optimizes the structural system of a top arch rib connecting area, and the arch ribs on two sides are transversely connected through an elliptical hollowed-out connecting support, so that the inclination of the arch ribs is reasonable, the space above a bridge deck is enlarged, and the hollow-out top basket arch bridge structure is suitable for the condition that the inward inclination requirements of the two arch ribs are smaller. Under the premise of considering space, the oval hollow connection support of the arch rib connection area can effectively reduce the weight and wind resistance of the top structure, increase the rigidity and stability of the arch rib connection area, reduce the stress and deformation of the arch rib and the bridge deck, and effectively prolong the service life of the bridge.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is a plan view of the present utility model.
Fig. 3 is an elevation view of the present utility model.
Fig. 4 is a side view of the present utility model.
The marks in the figure are as follows:
1-arch ribs, 2-elliptic hollowed connecting supports and 3-inhaul cables;
11-variable cross-section arch leg sections, 12-variable cross-section sections and 13-constant cross-section sections;
21-elliptical hollowed-out parts, 22-parabolic edges, 23-transverse struts, 24-first diagonal struts, 25-longitudinal struts, 26-second diagonal struts, 27-third diagonal struts and 28-steel arc plates;
221-upper parabola, 222-lower parabola.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present utility model, it should be understood that the terms "center line," "upper," "lower," "vertical," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "disposed," and the like are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance. Of course, such objects may be interchanged where appropriate, such that embodiments of the utility model described herein may be implemented in other sequences than those illustrated or otherwise described herein.
In a specific embodiment, the line reversal is defined as the longitudinal direction and the direction perpendicular to the line is defined as the transverse direction.
The utility model provides a hollowed-out top basket arch bridge structure, which is a novel basket arch bridge structure taking space, rigidity and wind resistance into consideration, and reasonably and optimally designs an arch connecting area structure at the top.
As shown in fig. 1-4, the structure includes ribs 1, arch attachment areas, and cables 3. The arch ribs 1 are positioned on two sides of the bridge deck and slightly incline towards the line center line, the arch part connecting area is connected between the tops of the arch ribs 1 on the two sides, and a vertical inhaul cable 3 is arranged between the arch ribs 1 and the bridge deck below.
The arch connecting area of the structure is an elliptic hollowed-out connecting support 2, and the most outstanding structural characteristics are elliptic hollowed-out and parabolic edges. The oval hollow connecting support 2 comprises a steel arc plate 28, an oval hollow 21 is arranged in the middle of the steel arc plate 28, and the edge of the oval hollow 21 is located at the center symmetrical position between the two arch ribs 1 as seen in fig. 2. The two longitudinal sides of the steel arc plate 28 are concave inwards to form a parabolic edge 22, the parabolic edge 22 consists of an upper parabola 221 and a lower parabola 222, and the two parabolas form a space crescent shape.
A plurality of transverse braces 23 are arranged below the steel arc plates 28, and the transverse braces 23 are made of steel plates or steel tubes. The transverse ends of the cross braces 23 are connected to the inside of the ribs 1 on both sides. As shown in the figure, seven cross braces 23 are arranged between the two arch ribs 1 within the range of the oval hollow 21, and two longitudinal sides are additionally provided with one. A longitudinal brace 25 is connected between the adjacent transverse braces 23 near the parabolic edge 22, and a first diagonal brace 24 and a second diagonal brace 26 which are symmetrical to each other are arranged on two sides of the longitudinal brace 25. A third diagonal brace 27 is provided between the longitudinally outermost wale 23 and the rib 1 on both sides. All diagonal and longitudinal struts 25 are made of steel pipe or sheet. The stay rope 3 avoids the position of the cross brace 23 on the arch rib 1, and the top of the cross brace and the inclined brace except the elliptical hollowed-out part 21 are covered by the steel arc plate 28.
In addition, the arch rib 1 is subjected to section optimization by the structure, and a variable section rib is adopted. The longitudinal two ends of the arch rib 1 are variable-section arch leg sections 11, and the sections of the variable-section arch leg sections 11 gradually decrease from the end parts to the inside. The longitudinal middle part of the arch rib 1 is provided with a constant section 13, the constant section 13 transversely corresponds to the elliptical hollow 21, and the section of the constant section 13 is unchanged along the length of the constant section. The rib 1 between the variable cross-section arch leg section 11 and the constant cross-section 13 is a variable cross-section 12, and the cross-section of the variable cross-section 12 gradually becomes smaller from the variable cross-section arch leg section 11 to the constant cross-section 13.
The utility model is provided with the large elliptical hollowed-out part in the middle of the arch rib connecting area, the hollowed-out part can effectively reduce the weight and wind resistance of the top structure, reduce the stress and deformation of the arch rib and the bridge deck, and simultaneously can form a unique and attractive modeling characteristic. The elliptical hollows can be expanded or replaced by hollows of other shapes, such as circles, squares, triangles, stars and the like, so long as the proper size, position and thickness of the hollows are ensured, and the rigidity and stability of the arch rib connecting area are not affected.
The parabolic edges are arranged on the two sides of the arch rib connecting area, the edges can effectively increase the rigidity and the stability of the arch rib connecting area, the wind resistance and the shock resistance of the bridge are improved, and meanwhile, the crescent modeling characteristics of a space shape can be formed. The parabolic edge can be expanded or replaced by other curved or straight edges, such as circular arcs, elliptical arcs, hyperbolas, straight lines and the like, so long as the proper length, radian and inclination angle of the edge are ensured, and the rigidity and stability of the arch rib connecting area are not affected.
According to the utility model, the cross braces are arranged in the middle of the arch rib connecting area, the corresponding diagonal braces are arranged at the edges of the elliptical hollowed-out parts and the parabola, and the stay cables are arranged between the cross braces and the arch rib connecting points, so that the rigidity and the stability of the arch rib connecting area can be further enhanced, and the rigidity and the stability can be coordinated with the edges of the elliptical hollowed-out parts and the parabola. The cross braces, diagonal braces and inhaul cables can be expanded or replaced by cross braces, diagonal braces and inhaul cables of other numbers, shapes, materials or connection modes; square, triangular or diamond diagonal braces; a steel plate or wire; welding, a bolt or rivet connection mode and the like, and the rigidity and the stability of the arch rib connection area are not affected as long as the proper size, position and strength of the cross braces, the diagonal braces and the inhaul cables are ensured.
The utility model adopts the basket arch bridge top structure with elliptical hollowed-out and parabolic edges, can increase the rigidity and stability of the arch rib connecting area, improve the wind resistance and shock resistance of the bridge, lighten the weight and wind resistance of the top structure, reduce the stress and deformation of the arch rib and the bridge deck, and prolong the service life of the bridge.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.
Claims (10)
1. The utility model provides a fretwork top basket arched bridge structure which characterized in that:
The structure comprises arch ribs (1), oval hollowed-out connecting supports (2) and inhaul cables (3);
The arch ribs (1) are positioned at two sides of the bridge deck and slightly incline to the line center line, and the oval hollowed-out connecting support (2) is connected between the tops of the arch ribs (1) at two sides;
a vertical inhaul cable (3) is arranged between the arch rib (1) and the bridge deck below.
2. The hollow-out roof basket arch bridge structure of claim 1, wherein:
The elliptical hollow connecting support (2) comprises a steel arc plate (28), and an elliptical hollow (21) is arranged in the middle of the steel arc plate (28).
3. The hollow-out roof basket arch bridge structure of claim 2, wherein:
The steel arc plates (28) are concave inwards on both longitudinal sides to form parabolic edges (22).
4. A hollow-out roof basket arch bridge structure according to claim 3, wherein:
A plurality of transverse cross braces (23) are arranged below the steel arc plates (28), and the transverse two ends of each cross brace (23) are connected to the inner sides of the arch ribs (1) on two sides.
5. The hollow out roof basket arch bridge structure of claim 4, wherein:
a longitudinal brace (25) is connected between the adjacent transverse braces (23) close to the parabolic edge (22), and a first diagonal brace (24) and a second diagonal brace (26) which are symmetrical to each other are arranged on two sides of the longitudinal brace (25).
6. The hollow out roof basket arch bridge structure of claim 5, wherein:
A third diagonal brace (27) is arranged between the transverse brace (23) at the outermost side in the longitudinal direction and the arch ribs (1) at the two sides.
7. The hollow out roof basket arch bridge structure of claim 6, wherein:
The arch rib (1) is a variable cross-section rib.
8. The hollow out roof basket arch bridge structure of claim 7, wherein:
The two longitudinal ends of the arch rib (1) are variable-section arch leg sections (11), and the sections of the variable-section arch leg sections (11) gradually decrease from the end parts to the inside.
9. The hollow out roof basket arch bridge structure of claim 8, wherein:
The longitudinal middle part of the arch rib (1) is provided with a constant section (13), the constant section (13) transversely corresponds to the elliptical hollow (21), and the section of the constant section (13) is unchanged along the length of the constant section.
10. The hollowed-out overhead basket arch bridge structure according to claim 9, wherein:
The arch rib (1) between the variable cross-section arch leg section (11) and the constant cross-section (13) is a variable cross-section (12), and the cross section of the variable cross-section (12) gradually becomes smaller from the variable cross-section arch leg section (11) to the constant cross-section (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322688885.6U CN220867953U (en) | 2023-10-08 | 2023-10-08 | Hollow-out top basket arch bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322688885.6U CN220867953U (en) | 2023-10-08 | 2023-10-08 | Hollow-out top basket arch bridge structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220867953U true CN220867953U (en) | 2024-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322688885.6U Active CN220867953U (en) | 2023-10-08 | 2023-10-08 | Hollow-out top basket arch bridge structure |
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| Country | Link |
|---|---|
| CN (1) | CN220867953U (en) |
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2023
- 2023-10-08 CN CN202322688885.6U patent/CN220867953U/en active Active
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