A top plate U-rib connection structure and construction method thereof

Abstract

The present invention relates to a top plate U-rib connection structure and a construction method thereof, comprising a top plate (1) and a U-rib (2) welded to the top plate (1), characterized in that the U-rib (2) is provided with a web connection plate (3) and a bottom plate connection plate (4) at a segment splicing position, the web connection plate (3) comprising a U-rib connection portion (31) and a bottom plate connection portion (32), the U-rib connection portion (31) being connected to the U-rib (2), and the bottom plate connection portion (32) being connected to the bottom plate connection plate (4). Compared with the prior art, the present invention solves the problems of fatigue at the existing top plate U-rib joint and weakened U-rib rigidity by improving the U-rib splicing plate and adding a bottom plate connection plate and bolts.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a top plate U-rib connection structure and a construction method thereof. Background Art

[0002] Orthotropic steel bridge deck is a structural form that is composed of mutually perpendicular top plates, longitudinal ribs and transverse diaphragms connected by welds to form an integrated structure that works together. It has the characteristics of light weight, large bearing capacity, wide range of applications, fast construction speed, and beautiful appearance. The longitudinal ribs of orthotropic steel bridge decks usually adopt U-shaped stiffening rib structure.

[0003] With the large-scale application of steel bridges, the fatigue cracking problem of orthotropic steel bridge decks has received more and more attention, especially the on-site connection structure of the top plate U rib at the segment joint, which is often the focus of fatigue problems. There are two main types of top plate U rib connection structures currently used: one is to use the U rib patching section and lining plate to connect the U ribs of the two segments by welding; the advantages of this connection structure are simple structure and no weakening of rigidity, and the disadvantage is that fatigue disease is prone to occur at the U rib joint. The second is to use the U rib web to add a splicing plate and use high-strength bolt connection instead of weld connection, but this structure needs to open a hand hole in the bottom plate at the U rib connection to solve the operation of high-strength bolts; the advantage of this connection structure is that the U rib is connected by high-strength bolts to avoid fatigue disease, and the disadvantage is that the U rib bottom plate has a hand hole, which greatly weakens the rigidity of the U rib. Summary of the invention

[0004] The purpose of the present invention is to provide a top plate U-rib connection structure and a construction method thereof, so as to alleviate the problem of weakening of U-rib rigidity at the joint.

[0005] The objective of the present invention can be achieved through the following technical solutions: a top plate U-rib connection structure, comprising a top plate and a U-rib welded to the top plate, wherein the U-rib is provided with a web connecting plate and a bottom plate connecting plate at the segment joint, wherein the web connecting plate comprises a U-rib connecting portion and a bottom plate connecting portion, wherein the U-rib connecting portion connects the U-ribs, and the bottom plate connecting portion connects the bottom plate connecting plates.

[0006] Preferably, the web connecting plate is arranged on the outside of the U-rib, and the bottom plate connecting plate is arranged at the bottom of the U-rib.

[0007] Preferably, the U-rib connection portion and the bottom plate connection portion are arranged at an angle, the U-rib connection portion is in close contact with the outer wall of the U-rib, and the bottom plate connection portion is in close contact with the bottom surface of the U-rib.

[0008] Further preferably, the U-rib connecting portion and the bottom plate connecting portion are integrally formed, and the connecting portion is arc-shaped.

[0009] Preferably, the U-rib connecting portion is detachably connected to the U-rib, and the bottom plate connecting portion is detachably connected to the bottom plate connecting plate.

[0010] Further preferably, the U-rib connection portion is connected to the U-rib via high-strength bolts, and the bottom plate connection portion is connected to the bottom plate connection plate via high-strength bolts.

[0011] Preferably, the U-rib is provided with a hand hole at the segment joint.

[0012] Further preferably, the hand hole is arranged on the bottom surface of the U rib.

[0013] Preferably, stiffening ribs are provided on the web connecting plate.

[0014] Further preferably, a plurality of the stiffening ribs are arranged in parallel on the bottom plate connecting portion.

[0015] A construction method of the top plate U-rib connection structure comprises the following steps:

[0016] S1: Use web connection plates and high-strength bolts to connect the U-ribs of the two segments through hand holes;

[0017] S2: Use the bottom plate connecting plate and high-strength bolts to bolt the bottom surfaces of the U-ribs of the two segments together.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention can solve the problem of weak connection of U-ribs on the top plate of orthotropic steel bridge deck;

[0020] 2. Based on the bolted connection of the U-rib web, the present invention modifies the splicing plate, adds a bottom plate connecting plate and high-strength bolts, and realizes full bolt docking, which not only avoids the problem of fatigue disease, but also solves the problem of weakening the U-rib stiffness at the docking point;

[0021] 3. The present invention can solve the fatigue problem at the joints and make up for the deficiency of weakened U-rib stiffness. It can be modified on the basis of the existing bolt connection structure. It is not only suitable for newly built orthogonal anisotropic steel bridge decks, but also suitable for the reinforcement of existing orthogonal special-shaped steel bridge decks.

[0022] 4. The present invention transforms the closed internal bolt connection structure into an external bolt connection structure through the transformation of the U-rib web connection plate, thereby achieving the last process without opening a hand hole and weakening the rigidity;

[0023] 5. The present invention adopts the L-shaped structural design of the web connecting plate to extend the internal connection outward, provide the bottom plate to connect the external base, and solve the problem of weakening the stiffness of the hand hole at the U-rib joint;

[0024] 6. The present invention transmits the U-rib bottom plate butt joint force to the bottom plate connection part and the bottom plate connection plate through high-strength bolts through the cooperation of the web connection plate, U rib and bottom plate connection plate, and transmits the shear force of the U-rib web to the U-rib connection part through high-strength bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of the top plate U-rib connection structure of the present invention;

[0026] Figure 2 It is a side view of the top plate U-rib connection structure of the present invention;

[0027] Figure 3 It is a partial top view of the top plate U-rib connection structure of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the web connecting plate of the present invention;

[0029] Figure 5 A side view of the fully welded connection structure of Comparative Example 1;

[0030] Figure 6 This is a front view of the fully welded connection structure of Comparative Example 1;

[0031] Figure 7 It is a side view of the bolted structure of the top plate U-rib web of comparative example 2;

[0032] Figure 8 This is a front view of the bolted structure of the top plate U-rib web of Comparative Example 2;

[0033] Fig. 9 It is a partial top view of the bolted structure of the top plate U-rib web of comparative example 2;

[0034] In the figure: 1-top plate, 2-U rib, 3-web connecting plate, 31-U rib connecting part, 32-bottom plate connecting part, 33-bolt hole, 4-bottom plate connecting plate, 5-high-strength bolt, 6-hand hole, 7-stiffening rib, 8-lining plate, 9-U rib patching section, 10-splicing plate, 11-U rib head plate. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0036] Example 1

[0037] A top plate U-rib connection structure, such as Figures 1 to 3As shown, it includes a top plate 1, a U rib 2, a web plate connecting plate 3, a bottom plate connecting plate 4, high-strength bolts 5 and hand holes 6. The U rib 2 is welded to the lower surface of the top plate 1, and the web plate connecting plate 3 and the bottom plate connecting plate 4 are both detachably arranged at the segment joint of the U rib 2 through high-strength bolts 5. Among them, the web plate connecting plate 3 is arranged on the outside of the U rib 2, and the structure is as shown in FIG. Figure 4 As shown, it includes a U-rib connection part 31 and a bottom plate connection part 32 set at an angle, the connection between the U-rib connection part 31 and the bottom plate connection part 32 is an arc structure, bolt holes 33 are opened on the U-rib connection part 31 and the bottom plate connection part 32, and a hand hole 6 is opened on the bottom surface of the U rib 2, as shown in FIG. Figure 1 As shown, the U-rib connection part 31 is fixed to the side wall of the U-rib 2 by high-strength bolts 5, and the bottom plate connection part 32 is fixed to the bottom plate connection plate 4 by high-strength bolts 5, so that the bottom plate connection plate 4 is fixed to the bottom surface of the U-rib 2 to compensate for the weakening of the rigidity of the hand hole 6 on the bottom surface of the U-rib 2.

[0038] Example 2

[0039] A top plate U-rib connection structure, wherein a stiffening rib 7 is provided on a bottom plate connection portion 32 to enhance the structural strength, and the remaining structure is the same as that of embodiment 1.

[0040] The preparation and construction method of the top plate U-rib connection structure of this embodiment is as follows:

[0041] The first step is to cut and process the web connecting plate 3 in the factory, transform the original rectangular connecting plate into an L-shaped connecting plate, and set stiffening ribs 7 to weld with it for reinforcement;

[0042] Step 2: Pre-assemble the segments in the factory, locate the high-strength bolt holes on the U rib 2, the web connecting plate 3, and the bottom plate connecting plate 4, and make the holes accurately. Open hand holes 6 at the bottom of the U rib 2 at the ends of the segments on both sides to facilitate the tightening of the high-strength bolts 5;

[0043] Step 3: At the splicing site, first use the web connecting plate 3 and high-strength bolts 5 to bolt the U-rib webs of the two segments through the hand holes 6;

[0044] Step 4: Position the holes of the bottom plate connecting plate 4, and connect the bottom plates of the U ribs on both sides with high-strength bolts 5 to compensate for the weakening of the hand hole rigidity.

[0045] Comparative Example 1

[0046] A fully welded connection structure, such as Figures 5-6 As shown, the top plate U rib is connected on site by on-site welding using the U rib patching section 9 and the steel lining plate 8. The advantages of this connection structure are simple structure and no weakening of rigidity, but the disadvantage is that fatigue damage is prone to occur at the U rib joint.

[0047] Comparative Example 2

[0048] A top plate U-rib web bolted structure, such as Figures 7 to 9 As shown, a U-rib web is used to add a splicing plate 10, which is connected by high-strength bolts 5, and a hand hole 6 is provided in the bottom plate of the U-rib to facilitate the operation of the high-strength bolts 5. The advantages of this solution are: the U-rib is connected by high-strength bolts to avoid fatigue damage, and the disadvantage is that the hand hole is provided in the bottom plate of the U-rib, which greatly weakens the rigidity of the U-rib.

[0049] The above description of the embodiments is to facilitate the understanding and use of the present invention by those skilled in the art. It is obvious that those skilled in 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 present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A top plate U-rib connection structure, comprising a top plate (1) and a U-rib (2) welded to the top plate (1), characterized in that: The U-rib (2) is provided with a web connecting plate (3) and a bottom connecting plate (4) at the segment joint, the web connecting plate (3) comprising a U-rib connecting portion (31) and a bottom connecting portion (32), the U-rib connecting portion (31) is connected to the U-rib (2), and the bottom connecting portion (32) is connected to the bottom connecting plate (4); The web connecting plate (3) is arranged on the outside of the U rib (2), and the bottom plate connecting plate (4) is arranged on the bottom of the U rib (2); The U-rib connection part (31) and the bottom plate connection part (32) are arranged at an angle, the U-rib connection part (31) is in close contact with the outer wall of the U-rib (2), and the bottom plate connection part (32) is in close contact with the bottom surface of the U-rib (2); The U-rib connection part (31) and the bottom plate connection part (32) are integrally formed, and the connection part is arc-shaped; The U-rib connecting portion (31) is detachably connected to the U-rib (2), and the bottom plate connecting portion (32) is detachably connected to the bottom plate connecting plate (4); The U-rib connection part (31) is connected to the U-rib (2) via high-strength bolts (5), and the bottom plate connection part (32) is connected to the bottom plate connection plate (4) via high-strength bolts (5).

2. The top plate U-rib connection structure according to claim 1, characterized in that: The U-rib (2) is provided with a hand hole (6) at the segment joint; The hand hole (6) is arranged on the bottom surface of the U rib (2).

3. The top plate U-rib connection structure according to claim 1, characterized in that: The web connecting plate (3) is provided with stiffening ribs (7).

4. The top plate U-rib connection structure according to claim 3, characterized in that: A plurality of the stiffening ribs (7) are arranged in parallel on the bottom plate connecting portion (32).

5. A construction method for the top plate U-rib connection structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Use the web connecting plate (3) and high-strength bolts (5) to connect the U-ribs of the two segments through the hand holes (6); S2: Use the bottom plate connecting plate (4) and high-strength bolts (5) to connect the bottom surfaces of the U-ribs of the two segments.

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