Multi-point integrated fatigue-resistant anchoring structure

Abstract

The utility model relates to a kind of multi-hanging point integrated fatigue-resistant anchoring structure, which comprises: at least two anchor plates, the upper portion of the anchor plate is provided with an ear, and the lower portion is provided with a connecting portion for connecting with the foundation structure;Anchor plate upper stiffener, welded to the edge area of the upper portion of the anchor plate;Anchor plate lower stiffener, welded to the edge area of the lower portion of the anchor plate;Anchor plate hoop stiffener, welded to the plate surface of the ear;A plurality of partition stiffeners are welded and fixed with the anchor plate and the foundation structure.Compared with the prior art, the utility model has the advantages of being suitable for multi-hanging point, more integrated fatigue-resistant, more explicit and reliable force transmission, etc.

Description

Technical Field

[0001] This utility model relates to the field of arch bridge suspension rod anchorage structure, and to an anchorage structure, and more particularly to a multi-point integrated fatigue-resistant anchorage structure. Background Technology

[0002] In cable-stayed bridge structures such as arch bridges and cable-stayed bridges, hangers are key force-transfer components connecting the main arch ring and the bridge deck system. Their function is to effectively transfer the dead and live loads of the bridge deck system to the main load-bearing structure. The hanger anchorage technology on the main girder, as a core element ensuring the safety, reliability, and durability of this force transfer process, has always been a key focus and challenge in bridge engineering design and research. Existing main girder hanger anchorage technologies, employing lug anchorage or anchor box anchorage structures, are only suitable for single-point anchorages and cannot be applied to multi-point anchorage structures, especially multi-point integrated fatigue-resistant anchorage structures.

[0003] Chinese patent application CN118166651A discloses a beam-arch composite bridge hanger end anchorage structure and construction method. The anchorage structure includes a longitudinal beam and a hanger assembly; the bottom end of the hanger assembly is connected to a beam end anchorage component; the top of the beam end anchorage component is placed on the upper part of the longitudinal beam, and the middle and lower parts of the beam end anchorage component are vertically fixed inside the longitudinal beam. This technical solution has good anchorage performance, but it is only suitable for single-point anchorage structures. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the existing technology and provide an integrated fatigue-resistant anchoring structure that has clear force transmission, is reliable, and is applicable to multiple suspension points.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A multi-point integrated fatigue-resistant anchoring structure, the anchoring structure comprising:

[0007] At least two anchor plates, each with a lifting lug at the top and a connection part at the bottom for connecting to the foundation structure;

[0008] A stiffening plate is welded to the upper edge area of ​​the anchor plate;

[0009] A stiffening plate is welded to the lower edge area of ​​the anchor plate;

[0010] An anchor plate with circumferential stiffening is welded to the plate surface of the lifting lug;

[0011] Multiple stiffening plates are welded and fixed to the anchor plate and the foundation structure.

[0012] Furthermore, the anchor plate is a single plate with a width that varies in a spindle shape, and its lower part is slotted to form the connecting part.

[0013] Furthermore, the basic structure includes a horizontal plate and a vertical partition plate connected to the horizontal plate. The connecting part passes through a pre-reserved hole in the horizontal plate, and the slotted part is fixed to the vertical partition plate by bevel penetration welding. The upper part of the anchor plate is welded and fixed to the horizontal plate.

[0014] Furthermore, both the stiffening plate on the anchor plate and the lower stiffening plate on the anchor plate are welded to the horizontal plate.

[0015] Furthermore, the stiffening plate of the partition includes a horizontal stiffening plate and a vertical stiffening plate, both of which are welded to the foundation structure, and the horizontal stiffening plate is cut off when it encounters the anchor plate.

[0016] Furthermore, the lifting lugs on the anchor plate are connected to the lifting rod via pins.

[0017] Furthermore, the multiple anchor plates are inclined, and the inclination angle of the anchor plates is adapted to the angle of the hanger rods they are connected to.

[0018] Furthermore, the thickness, end dimensions, middle dimensions, and groove depth of the anchor plate are adapted to the internal force of the hanger rod.

[0019] Furthermore, the theoretical anchor points of the center suspension points of each of the aforementioned lugs are at the same horizontal height.

[0020] Furthermore, both the stiffening plate on the upper anchor plate and the stiffening plate on the lower anchor plate are curved plates with a bending shape adapted to the anchor plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] First, this anchoring structure achieves a multi-point application that existing anchoring structures cannot, and it adds stiffening plates in multiple places and welds them at various parts, improving the overall integrity and fatigue resistance of the structure.

[0023] II. In this anchoring structure, holes are made in the top plate of the main beam box girder, and slots are cut in the lower part of the multi-point lifting lug anchor plates to insert into the main beam. The anchor plates are simultaneously welded to the main beam diaphragms and the top plate of the main beam to ensure the force transmission reliability of the multi-point anchoring structure. The anchor plates are equipped with stiffening plates to achieve out-of-plane reinforcement. The stiffening plates are made of variable-width bent plates with a bending shape that matches the anchor plates. The stiffening plates are welded to the top plate of the box girder at the joint position of the main beam to ensure the fatigue resistance and out-of-plane stability of the anchor plates. The anchor plates and stiffening plates of each lifting point are integrated into a whole to ensure the integrity of the multi-point anchoring structure.

[0024] Third, in this anchoring structure, the inclination angle of the anchor plate is adapted to the angle of the multiple hangers. The thickness, end dimensions, middle dimensions, and the depth of the groove of the anchor plate inserted into the foundation structure should be adapted to the internal force of each hanger. The dimensions of the upper and lower stiffening plates and the circumferential stiffening plates on the anchor plate are adapted to the thickness, end dimensions, and middle dimensions of the anchor plate, which improves the compatibility between the components and makes the force transmission more clear and reliable. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the specific structure of an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A cross-sectional view of the embodiment along the S1-S1 direction shown in the figure;

[0027] Figure 3 for Figure 1 The side view of the embodiment in the S2-S2 direction shown;

[0028] Figure 4 for Figure 2 , 3 A cross-sectional view of the embodiment along the S3-S3 direction shown;

[0029] Figure 5 for Figure 2 , 3 Cross-sectional view of the embodiment along the S4-S4 direction shown;

[0030] Figure 6 for Figure 2 , 3 Top view of the embodiment along the S5-S5 direction shown;

[0031] Figure 7 for Figure 2 , 3 The embodiment shown is a bottom view in the S6-S6 direction.

[0032] Figure 1-7 As indicated by the index number:

[0033] 1, 2 - Stiffening plates on the upper part of the anchor plate; 3, 4 - Circumferential stiffening plates on the anchor plate; 5, 6 - Anchor plates; 7, 8 - Horizontal stiffening plates; 9, 10, 11 - Vertical stiffening plates; 12, 13 - Lower stiffening plates on the anchor plate; 14, 15 - Hangers; 16, 17 - Theoretical anchor points; 18 - Top plate of the box girder; 19 - Box girder diaphragm; α, β - Inclination angle of the anchor plate. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0035] This embodiment provides a multi-point integrated fatigue-resistant anchoring structure suitable for closely arranged multi-hanger conditions, i.e., multiple hangers are arranged at the same position on the main beam of an arch bridge, with the longitudinal bridge position of each hanger point being the same, and the transverse bridge position spacing being small, resulting in a closely arranged state. The hangers are not vertically arranged, and their angles to the vertical plane are inconsistent. This structure involves opening holes in the top plate of the main beam box girder, inserting the lower part of the multi-point lifting lug anchor plates into the main beam through slots, and simultaneously welding the anchor plates to the main beam diaphragms and the main beam top plate to ensure the force transmission reliability of the multi-point anchoring structure. The anchor plates are reinforced out-of-plane using stiffening plates, which are variable-width bent plates with a bending shape adapted to the anchor plates. The stiffening plates are welded to the box girder top plate at the main beam junction to ensure the fatigue resistance and out-of-plane stability of the anchor plates. The anchor plates and stiffening plates of each hanger point are integrated into a whole, ensuring the integrity of the multi-point anchoring structure.

[0036] like Figure 1-7 As shown, this embodiment takes a double-suspension point as an example. The anchoring structure includes two anchor plates 5 and 6. Each of the anchor plates 5 and 6 has a lifting lug on its upper part and a connecting part on its lower part for connecting with the top plate of the box girder and the diaphragm of the box girder.

[0037] Stiffening plates 1 and 2 are welded to the upper edge area of ​​anchor plates 5 and 6 to ensure the fatigue resistance and stability of the upper part of anchor plates 5 and 6.

[0038] The stiffening plates 12 and 13 under the anchor plates are welded to the lower edge area of ​​the anchor plates 5 and 6 to ensure the stability of the lower part of the anchor plates 5 and 6.

[0039] Anchor plates circumferential stiffening plates 3 and 4 are welded to the surfaces of anchor plates 5 and 6 lifting lugs, respectively.

[0040] Multiple stiffening plates, including transverse stiffening plates 7 and 8 and vertical stiffening plates 9, 10 and 11, are welded and fixed to the box girder diaphragm 19 to ensure the force transmission reliability and fatigue resistance of this anchoring structure.

[0041] In this embodiment, two upper stiffening plates, four lower stiffening plates, and four circumferential stiffening plates are provided, along with two transverse stiffening plates and four vertical stiffening plates. Each lifting point uses one upper stiffening plate, one upper stiffening plate, two lower stiffening plates, and two circumferential stiffening plates. The upper stiffening plates at each lifting point are welded together, and the lower stiffening plates are welded together. The upper and lower stiffening plates are simultaneously connected to the top plate of the box girder to ensure the integrity of the anchorage structure.

[0042] See Figure 3 , 4 As shown, anchor plates 5 and 6 are integral plates with a spindle-shaped width, and their lower parts are slotted to form a connection part that connects with the box girder.

[0043] See Figure 1 , 2 As shown, the lifting lugs on the upper part of the anchor plates 5 and 6 are connected to the lifting rods 14 and 15 by pins.

[0044] See Figure 1 , 2 As shown, in this embodiment, the hole is made on the top plate 18 of the box girder, and the groove of the anchor plate is inserted into the box girder and fixed to the box girder partition 19 by bevel penetration welding through the reserved hole in the top plate of the box girder. The upper part of the anchor plates 5 and 6 is welded to the top plate 18 of the box girder on the top surface of the box girder.

[0045] See Figure 3 As shown, stiffening plates 1 and 2 on the upper anchor plate and stiffening plates 12 and 13 on the lower anchor plate are all welded to the top plate 18 of the box girder to ensure the fatigue resistance and out-of-plane stability of the anchor plates 5 and 6.

[0046] Stiffening plates 1 and 2 on the anchor plate provide out-of-plane stiffening to the portion of the upper box girder of the anchor plate, ensuring the fatigue resistance and stability of the anchor plate. The stiffening plates on the anchor plate are widened curved plates, whose bending shape is coordinated with the shape of the portion of the upper box girder of the anchor plate. The width is narrow in the middle and wide at both ends. After the narrow side is connected to the anchor plate, it adapts to the shape of the hanger fork lug. It is welded to the top plate of the box girder on the top surface of the box girder. The stiffening plates 1 and 2 on the two anchor plates are butt-welded to ensure the integrity of the anchoring structure.

[0047] The lower stiffening plates 12 and 13 of the anchor plate provide out-of-plane stiffening to the inner part of the anchor plate box. The lower stiffening plate of the anchor plate is an "L"-shaped variable-width curved plate. Its bending shape is coordinated with the shape of the inner part of the box girder below the anchor plate. The width is wider at the top and narrower at the bottom. It is welded to the top plate of the box girder on the bottom surface of the top plate. The two lower stiffening plates of the anchor plate are butt welded to each other to ensure the stability of the anchor plate.

[0048] The anchor plate circumferential stiffening plates 3 and 4 provide local stiffening at the connection between the anchor plate and the hanger. Each anchor plate uses two circular steel plates with the same radius as the opening of the anchor plate. The opening forms the anchor plate circumferential stiffening plate. The anchor plate circumferential stiffening plate and the center of the opening of the anchor plate are aligned and then welded together.

[0049] A matching horizontal stiffening plate and a vertical stiffening plate are added at the lower edge of the anchor plate. The horizontal stiffening plate is welded to the anchor plate, and the vertical stiffening plate is aligned with the anchor plate. (See also...) Figure 1 , 2As shown, the transverse stiffening plate 7 is cut off at the anchor plates 5 and 6. When the anchor plates 5 and 6 are under stress, the force can be transmitted to the box girder partition 19 through the transverse stiffening plate 7 in contact with the anchor plates 5 and 6, and then to the entire box girder, ensuring the reliability of force transmission.

[0050] See Figure 1-4 As shown, the inclination angles α and β of anchor plates 5 and 6 are adjusted according to the hanger angle to match the hanger angle. The plate thickness, end dimensions, middle dimensions, and insertion depth of the slots in anchor plates 5 and 6 into the foundation structure are adapted to the internal forces of hangers 14 and 15, and can be set based on experience. The dimensions of upper stiffening plates 1 and 2, lower stiffening plates 12 and 13, and circumferential stiffening plates 3 and 4 of the anchor plates are adapted to the plate thickness, end dimensions, and middle dimensions of anchor plates 5 and 6. The angle of the anchor plates is adapted to the hanger angle. The plate thickness, end dimensions, and middle dimensions of the anchor plates, as well as the insertion depth of the slots in the anchor plates into the box girder, are determined based on the internal forces of each hanger. On this basis, the dimensions of the upper and lower stiffening plates and the circumferential stiffening plates on the anchor plates are determined, ensuring clear, direct, and reliable force transmission.

[0051] See Figure 1 , 2 As shown, the theoretical anchor points 16 and 17 of the center lifting points of each lifting lug are at the same horizontal height, ensuring the stress stability of the anchoring structure after connecting the lifting rods 14 and 15 and preventing local overload.

[0052] The arch bridge employs a densely arranged array of hangers. Based on the structure described above, when tensioning the hangers, the tension force is directly transmitted through the anchor plates of this anchoring structure to the box girder diaphragms, then to the box girder web, and finally to the entire main girder, thus bearing the bridge load. The force transmission is clear, direct, and reliable. Under live load conditions, non-loads from vehicles and pedestrians can also be transmitted through the box girder web to the diaphragm stiffening plates, then through the diaphragm stiffening plates to the anchor plates, and finally through the anchor plates of this anchoring structure to the hangers, and then to the arch ribs. The upper and lower stiffening plates of the anchor plates provide out-of-plane stiffening. The upper stiffening plate ensures the fatigue resistance and stability of the upper part of the anchor plate connected to the hangers, while the lower stiffening plate ensures the stability of the lower part of the anchor plate connected to the box girder diaphragms. The circumferential stiffening ribs of the anchor plates provide localized reinforcement and simultaneously adapt the ends of the anchor plates to the hanger fork lugs.

[0053] In actual use, the angle of each anchor plate can be adjusted to match the angle of multiple hangers. The thickness, end size, and middle size of the anchor plate, as well as the depth of the anchor plate slot inserted into the box girder, can be determined according to the internal force of each hanger. Based on this, the dimensions of the upper and lower stiffening plates and the circumferential stiffening plates on the anchor plate can be determined. This method is applicable to anchoring structures with two or more closely arranged multiple hangers.

[0054] In other embodiments, there may be more than two anchor plates, with other structures set accordingly.

[0055] The above structure can directly and reliably transfer the internal forces of two or more closely arranged hangers to the main beam. It can be widely used in arch bridges with closely arranged hangers, and appropriate parameters can be selected according to the actual application.

[0056] The preferred embodiments of this utility model 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 this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model 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 multi-point integrated fatigue-resistant anchoring structure, characterized in that, The anchoring structure includes: At least two anchor plates, each with a lifting lug at the top and a connection part at the bottom for connecting to the foundation structure; A stiffening plate is welded to the upper edge area of ​​the anchor plate; A stiffening plate is welded to the lower edge area of ​​the anchor plate; An anchor plate with circumferential stiffening is welded to the plate surface of the lifting lug; Multiple stiffening plates are welded and fixed to the anchor plate and the foundation structure.

2. The multi-point integrated fatigue-resistant anchoring structure according to claim 1, characterized in that, The anchor plate is a single plate with a width that varies in a spindle shape, and its lower part is slotted to form the connecting part.

3. The multi-point integrated fatigue-resistant anchoring structure according to claim 2, characterized in that, The basic structure includes a horizontal plate and a vertical partition plate connected to the horizontal plate. The connecting part passes through a pre-reserved hole in the horizontal plate, and the slotted part is fixed to the vertical partition plate by bevel penetration welding. The upper part of the anchor plate is welded and fixed to the horizontal plate.

4. The multi-point integrated fatigue-resistant anchoring structure according to claim 3, characterized in that, Both the stiffening plate on the upper anchor plate and the stiffening plate on the lower anchor plate are welded to the horizontal plate.

5. The multi-point integrated fatigue-resistant anchoring structure according to claim 1, characterized in that, The stiffening plate of the partition includes a horizontal stiffening plate and a vertical stiffening plate, both of which are welded to the foundation structure. The horizontal stiffening plate is cut off when it encounters the anchor plate.

6. The multi-point integrated fatigue-resistant anchoring structure according to claim 1, characterized in that, The lifting lugs on the anchor plate are connected to the lifting rod via pins.

7. The multi-point integrated fatigue-resistant anchoring structure according to claim 6, characterized in that, The multiple anchor plates are inclined, and the inclination angle of the anchor plates is adapted to the angle of the hangers they are connected to.

8. The multi-point integrated fatigue-resistant anchoring structure according to claim 2, characterized in that, The thickness, end dimensions, middle dimensions, and groove depth of the anchor plate are adapted to the internal force of the hanger rod.

9. In the multi-point integrated fatigue-resistant anchoring structure according to claim 1, the theoretical anchor points of the center lifting points of each of the lifting lugs are at the same horizontal height.

10. The multi-point integrated fatigue-resistant anchoring structure according to claim 1, characterized in that, Both the upper stiffening plate and the lower stiffening plate of the anchor plate are curved plates with a shape adapted to the anchor plate.

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