A method of manufacturing an orthotropic steel bridge deck and an orthotropic steel bridge deck

Abstract

The application relates to the technical field of bridge steel structure manufacturing, in particular to a manufacturing method of an orthotropic steel bridge deck and the orthotropic steel bridge deck. The manufacturing method of the orthotropic steel bridge deck comprises the following steps: welding a plurality of longitudinal ribs to a deck at intervals; arranging a partition plate in the interval between every two adjacent longitudinal ribs, and welding the partition plate to the deck and the two adjacent longitudinal ribs respectively; wherein the sides, away from the deck, of the longitudinal ribs and the partition plate are flush; and welding the sides, away from the deck, of the longitudinal ribs and the partition plate to a transverse partition plate body, wherein the transverse partition plate body and the partition plate form a transverse partition plate.

Description

Technical Field

[0001] This invention relates to the field of bridge steel structure manufacturing technology, and in particular to a method for manufacturing orthotropic steel bridge decks and orthotropic steel bridge decks. Background Technology

[0002] my country has vigorously promoted the application of steel bridges in major transportation infrastructure construction. The main spans of long-span steel bridges are constantly breaking world records, and various types of small and medium-span steel bridges are being widely adopted. The application scenarios and scope of steel bridges are continuously expanding, with the total number increasing significantly year by year and maintaining a sustained high-speed growth trend, leading the world in annual new additions. Orthotropic steel bridge decks, as a significant and landmark innovation in modern bridge engineering, possess outstanding advantages such as light weight, high load-bearing capacity, and wide applicability. With the rapid development of steel bridges in my country, orthotropic steel bridge decks have been widely used in various types of bridges, including highways, railways, urban bridges, and municipal bridges.

[0003] In related technologies, orthotropic steel bridge deck structures are welded together from deck panels, longitudinal U-ribs, and transverse diaphragms. Since the longitudinal U-ribs are bent parts with arcs, the transverse diaphragms need to have arc-shaped openings to weld the longitudinal U-ribs. However, at the connection between the arc-shaped openings of the transverse diaphragms and the longitudinal U-ribs, stress concentration will occur due to structural discontinuity, which can easily lead to fatigue cracking. Summary of the Invention

[0004] This application provides a method for manufacturing orthotropic steel bridge decks and orthotropic steel bridge decks, which to some extent improves the technical problem in the related art where stress concentration occurs at the connection between the transverse diaphragm body and the arc-shaped opening of the longitudinal U-rib due to structural discontinuity, which easily leads to fatigue cracking.

[0005] In a first aspect, embodiments of this application provide a method for manufacturing orthotropic steel bridge deck panels, including:

[0006] Multiple longitudinal ribs are welded to the panel; wherein the multiple longitudinal ribs are spaced apart.

[0007] A partition is provided in the interval between each pair of adjacent longitudinal ribs, and the partition is welded to the panel and the two adjacent longitudinal ribs respectively; wherein the longitudinal ribs and the partition are flush with the side away from the panel.

[0008] The longitudinal ribs and the partitions are welded to the side of the partition away from the panel to the transverse partition body, wherein the transverse partition body and the partitions form a transverse partition.

[0009] In some embodiments, the step of welding the plurality of longitudinal ribs to the panel at intervals includes:

[0010] Multiple longitudinal rib bodies are welded to the panel at intervals; wherein, the longitudinal rib bodies are open ribs, and two adjacent longitudinal rib bodies form a group;

[0011] A cover plate is welded between the sides of two adjacent longitudinal rib bodies away from the panel to form the longitudinal rib.

[0012] In some embodiments, the step of welding the plurality of longitudinal rib bodies to the panel at intervals includes:

[0013] Multiple longitudinal rib bodies are welded to the panel at intervals using a multi-head gantry welding machine through double-sided welding; wherein the weld penetration depth between the longitudinal rib body and the panel is more than 80% of the thickness of the longitudinal rib plate.

[0014] In some embodiments, the step of welding a cover plate between the sides of two adjacent longitudinal rib bodies away from the panel to form the longitudinal rib includes:

[0015] The cover plate is welded to the two adjacent longitudinal rib bodies by a multi-head gantry welding machine through single-sided welding; wherein the weld penetration depth between the cover plate and the longitudinal rib body is more than 80% of the thickness of the cover plate.

[0016] In some embodiments, the step of welding the longitudinal rib and the partition plate to the side away from the panel to the transverse partition plate body includes:

[0017] The side of the partition away from the panel is welded to the transverse partition body;

[0018] The cover plate is welded to the diaphragm body.

[0019] In some embodiments, the step of welding the side of the partition away from the panel to the transverse partition body includes:

[0020] The partition plate is welded to the side of the transverse partition plate body away from the panel by means of applying ceramic backing or carbon arc gouging.

[0021] In some embodiments, the step of welding the cover plate to the diaphragm body includes:

[0022] The T-shaped joint weld between the diaphragm body and the cover plate is welded; wherein the weld leg size is 5-8mm.

[0023] In some embodiments, the step of providing a partition in the interval between each pair of adjacent longitudinal ribs and welding the partition to the panel and the two adjacent longitudinal ribs respectively includes:

[0024] The partition is welded to the longitudinal rib and the panel respectively using a welding robot or manual welding; wherein the weld leg size is 5-8mm.

[0025] Secondly, embodiments of this application provide an orthotropic steel bridge deck, comprising:

[0026] panel;

[0027] Multiple longitudinal ribs are welded to the panel, and the multiple longitudinal ribs are spaced apart;

[0028] A partition is disposed in the gap between two adjacent longitudinal ribs and welded to the two adjacent longitudinal ribs and the panel respectively, with the longitudinal ribs and the partition being flush with the side away from the panel;

[0029] The transverse diaphragm body is welded to the longitudinal rib and the side of the diaphragm away from the panel.

[0030] In some embodiments, the longitudinal rib includes a cover plate and two longitudinal rib bodies, the longitudinal rib bodies being open ribs, the two longitudinal rib bodies being welded to the panel at intervals, and the cover plate being welded between the two longitudinal ribs on the side away from the panel.

[0031] The beneficial effects of this application are as follows:

[0032] This application provides a method for manufacturing orthotropic steel bridge decks and an orthotropic steel bridge deck. The method involves disassembling the existing diaphragm into a diaphragm body and multiple diaphragms. First, the multiple diaphragms are assembled and welded with the longitudinal ribs and the deck panel. Then, the multiple diaphragms and the longitudinal ribs are welded to the diaphragm body on the side furthest from the deck panel. This improves the assembly accuracy of the diaphragms and longitudinal ribs, thus enhancing welding quality. Furthermore, the diaphragm body does not require an arc-shaped opening for mounting the longitudinal ribs, allowing for continuous welds between the diaphragm body, the multiple diaphragms, and the longitudinal ribs. This effectively addresses the stress concentration problem at the arc-shaped opening of the diaphragm in the prior art and significantly improves the fatigue strength of the weld connecting the diaphragm and the longitudinal ribs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0034] Figure 1 This is a schematic diagram of the orthotropic steel bridge deck provided in this embodiment.

[0035] Figure 2 for Figure 1 Assembly diagram of orthotropic steel bridge deck Figure 1 .

[0036] Figure 3 for Figure 1 Assembly diagram of orthotropic steel bridge deck Figure 2 .

[0037] Figure 4 for Figure 1 Assembly diagram of orthotropic steel bridge deck Figure 3 .

[0038] Figure 5 for Figure 1 Assembly diagram of orthotropic steel bridge deck Figure 4 .

[0039] Figure 6 for Figure 1 Assembly diagram of orthotropic steel bridge deck Figure 5 .

[0040] Explanation of reference numerals in the attached figures:

[0041] 100-Orthotropic steel bridge deck, 110-Longitudinal rib, 111-Longitudinal rib body, 112-Cover plate, 120-Deck panel, 130-Diaphragm, 131-Diaphragm body, 132-Diaphragm. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] Combination Figure 1 This application provides a method for manufacturing orthotropic steel bridge deck panels, comprising:

[0047] S1: Weld multiple longitudinal ribs 110 to the panel 120, wherein the multiple longitudinal ribs 110 are spaced apart.

[0048] Combination Figure 2 Multiple longitudinal ribs 110 are assembled onto the panel 120. The longitudinal ribs 110 ensure the longitudinal bending strength of the steel bridge structure. Multiple longitudinal ribs 110 can be set at equal intervals to ensure the uniformity of force distribution.

[0049] Specifically, the steps of welding the multiple longitudinal ribs 110 to the panel 120 include:

[0050] S11: Weld multiple longitudinal rib bodies 111 to the panel 120; wherein, the longitudinal rib body 111 is an open rib, the multiple longitudinal rib bodies 111 are spaced apart, and two adjacent longitudinal rib bodies 111 form a group.

[0051] The weld connecting the longitudinal rib 110 and the panel 120 is a fatigue-prone part of the steel bridge panel 120. In the prior art, the longitudinal rib body 111 is mostly a longitudinal U-rib, i.e., a closed rib. However, the welding of longitudinal U-ribs is difficult. When single-sided welding is used with the panel 120, the quality of the weld root is difficult to guarantee. When double-sided welding is used, the quality of the internal weld is difficult to detect. Weld quality defects will have a significant adverse effect on fatigue performance. Using open ribs facilitates the weld detection of double-sided welding between the longitudinal rib 110 and the panel 120, thereby helping to ensure weld quality and improve fatigue performance.

[0052] It should be noted that "adjacent" here does not mean consecutively adjacent, but rather adjacent with intervals. For example, if multiple longitudinal rib bodies 111 are numbered 1, 2, 3, 4, 5... in sequence, then 1 and 2 are a group, 3 and 4 are a group, and so on.

[0053] Specifically, a multi-head gantry welding machine can be used to weld multiple longitudinal rib bodies 111 onto the panel 120 by double-sided welding; wherein the weld penetration depth between the longitudinal rib body 111 and the panel 120 is more than 80% of the thickness of the longitudinal rib 110 plate.

[0054] S12: Weld a cover plate 112 between the sides of two adjacent longitudinal rib bodies 111 away from the panel 120 to form longitudinal ribs 110.

[0055] Combination Figure 3 Here, the two adjacent longitudinal rib bodies 111 refer to the two longitudinal rib bodies 111 that form a group in step S11. That is, a longitudinal rib 110 includes two longitudinal rib bodies 111 and a cover plate 112, and the two longitudinal rib bodies 111 and the cover plate 112 are assembled to form a structure similar to a closed rib. Although open ribs have higher welding quality than closed ribs, closed ribs have higher resistance to disturbance and torsional stiffness than open ribs, and can better transfer concentrated lateral loads and reduce stress on the bridge deck 120. That is, in this embodiment, while using open ribs to increase welding quality, a cover plate 112 is added to increase the torsional strength of the steel bridge structure, which can effectively avoid fatigue cracking problems. Moreover, the welding shrinkage stress of the cover plate 112 and the longitudinal rib 110 and the welding shrinkage stress of the longitudinal rib 110 and the deck 120 are offset, which is beneficial to controlling the welding deformation of the joints of the steel bridge deck 120.

[0056] In some embodiments, the thickness of the panel 120 can be 14-20 mm, the thickness of the longitudinal rib body 111 and the cover plate 112 can be 8-14 mm, and the thickness of the partition plate 132 and the transverse partition body 131 can be 10-16 mm.

[0057] Specifically, in combination Figure 4 A multi-head gantry welding machine can be used to weld the cover plate 112 between two adjacent longitudinal rib bodies 111 by single-sided welding; wherein the weld penetration depth between the cover plate 112 and the longitudinal rib body 111 is more than 80% of the thickness of the cover plate 112.

[0058] S2: A partition 132 is provided in the interval between each two adjacent longitudinal ribs 110, and the partition 132 is welded to the panel 120 and the two adjacent longitudinal ribs 110 respectively; wherein the longitudinal ribs 110 and the partition 132 are flush with the side away from the panel 120.

[0059] Combination Figure 5 The partition 132 can be welded to the longitudinal rib 110 and the panel 120 respectively by welding robot or manual welding, so that the partition 132, the longitudinal rib 110 and the panel 120 are assembled into one piece; wherein the weld leg size is 5-8mm.

[0060] Obviously, combining Figure 3The partition 132 is welded to the longitudinal rib body 111. After the longitudinal rib body 111 is welded on the panel 120, the above steps S2 and S12 can be performed simultaneously. The cover plate 112 and the partition 132 can be tack welded first, and then the cover plate 112 can be welded to the longitudinal rib body 111 by single-sided welding. The partition 132 can be welded to the longitudinal rib 110 and the panel 120 by welding robot or manual welding.

[0061] S3: Weld the longitudinal rib 110 and the partition plate 132 away from the panel 120 to the transverse partition body 131, wherein the transverse partition body 131 and the partition plate 132 form the transverse partition 130.

[0062] Combination Figure 6 The proposed solution involves disassembling the existing transverse diaphragm 130 into a transverse diaphragm body 131 and multiple diaphragms 132. The multiple diaphragms 132 are first assembled with the panel 120 and longitudinal ribs 110, and then assembled with the transverse diaphragm body 131. This improves the assembly accuracy and welding quality between the transverse diaphragm 130 and the longitudinal ribs 110. Furthermore, no opening is needed on the transverse diaphragm body 131 to install the longitudinal ribs 110, and the longitudinal ribs 110 and diaphragms 132 are flush with the side furthest from the panel 120. This allows for a continuous weld between the transverse diaphragm body 131, the multiple diaphragms 132, and the longitudinal ribs 110, effectively mitigating the stress concentration problem at the arc-shaped opening of the transverse diaphragm 130 in the prior art and significantly improving the fatigue strength of the weld connecting the transverse diaphragm 130 and the longitudinal ribs 110. Of course, the longitudinal ribs 110 are perpendicular to the transverse diaphragm 130.

[0063] It should be noted that, for ease of assembly, both the partition 132 and the longitudinal rib 110 are welded to the upper part of the panel 120. Therefore, after the partition 132 is assembled with the panel 120 and the longitudinal rib 110, the panel 120 needs to be flipped over and then hoisted above the transverse partition body 131, so that the side of the partition 132 and the longitudinal rib 110 away from the panel 120 can be connected and welded to the transverse partition body 131.

[0064] Specifically, the step of welding the longitudinal rib 110 and the side of the partition plate 132 away from the panel 120 to the transverse partition plate body 131 includes:

[0065] S31: Weld the side of the partition 132 away from the panel 120 to the transverse partition body 131.

[0066] The side of the partition plate 132 away from the panel 120 can be welded to the transverse partition plate body 131 by attaching a ceramic backing or by carbon arc gouging.

[0067] S32: Weld the cover plate 112 to the diaphragm body 131.

[0068] The T-shaped joint weld between the diaphragm body 131 and the cover plate 112 can be welded; wherein the weld leg size is 5-8mm.

[0069] Combination Figure 1 Based on the same inventive concept, this application also provides an orthotropic steel bridge deck 100, including a deck 120, a plurality of longitudinal ribs 110, partitions 132, and a transverse partition body 131. The plurality of longitudinal ribs 110 are welded to the deck 120 and are spaced apart. The partitions 132 are disposed in the gaps between adjacent longitudinal ribs 110 and are welded to adjacent longitudinal ribs 110 and the deck 120, respectively. The sides of the longitudinal ribs 110 and partitions 132 away from the deck 120 are flush. The transverse partition body 131 is welded to the sides of the longitudinal ribs 110 and partitions 132 away from the deck 120.

[0070] The diaphragm body 131 and multiple partitions 132 are welded to form the diaphragm 130. This means that the diaphragm 130 in the prior art is divided into the diaphragm body 131 and multiple partitions 132. The multiple partitions 132 are first assembled with the panel 120 and the longitudinal ribs 110, and then assembled with the diaphragm body 131. This can improve the assembly accuracy and welding quality between the diaphragm 130 and the longitudinal ribs 110. There is no need for an opening on the diaphragm body 131 to install the longitudinal ribs 110. The longitudinal ribs 110 and the side of the partitions 132 away from the panel 120 are flush. Thus, a continuous weld can be formed between the diaphragm body 131, the multiple partitions 132 and the longitudinal ribs 110. This effectively improves the stress concentration problem at the arc-shaped opening of the diaphragm 130 in the prior art and greatly improves the fatigue strength of the weld connecting the diaphragm 130 and the longitudinal ribs 110.

[0071] In some embodiments, the longitudinal rib 110 includes a cover plate 112 and two longitudinal rib bodies 111 spaced apart. The longitudinal rib bodies 111 are open ribs. The two longitudinal rib bodies 111 are welded to the panel 120, and the cover plate 112 is welded between the two longitudinal ribs 110 on the side away from the panel 120.

[0072] The weld connecting the longitudinal rib 110 and the panel 120 is a fatigue-prone part of the steel bridge panel 120. In the prior art, the longitudinal rib body 111 is mostly a longitudinal U-rib, i.e., a closed rib. However, the welding of longitudinal U-ribs is difficult. When single-sided welding is used with the panel 120, the quality of the weld root is difficult to guarantee. When double-sided welding is used, the quality of the internal weld is difficult to detect. Weld quality defects will have a significant adverse effect on fatigue performance. Using open ribs facilitates the weld detection of double-sided welding between the longitudinal rib 110 and the panel 120, thereby helping to ensure weld quality and improve fatigue performance.

[0073] That is, a longitudinal rib 110 includes two longitudinal rib bodies 111 and a cover plate 112, and the two longitudinal rib bodies 111 and the cover plate 112 are assembled to form a structure similar to a closed rib. Although open ribs have higher welding quality than closed ribs, closed ribs have higher resistance to disturbance and torsional stiffness than open ribs, and can better transfer concentrated lateral loads and reduce stress on the bridge deck 120. In other words, the embodiments of this application use open ribs to increase welding quality and add cover plates 112 to increase the torsional strength of the steel bridge structure, which can effectively avoid fatigue cracking problems.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0075] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0076] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for manufacturing orthotropic steel bridge deck panels, characterized in that, include: Multiple longitudinal ribs are welded to the panel; wherein the multiple longitudinal ribs are spaced apart. A partition is provided in the interval between each pair of adjacent longitudinal ribs, and the partition is welded to the panel and the two adjacent longitudinal ribs respectively; wherein the longitudinal ribs and the partition are flush with the side away from the panel. The longitudinal ribs and the partitions are welded to the side away from the panel to the transverse partition body, wherein the transverse partition body and the partitions form a transverse partition; The step of welding multiple longitudinal ribs to the panel includes: Multiple longitudinal rib bodies are welded to the panel; wherein, the longitudinal rib body is an open rib, the multiple longitudinal rib bodies are spaced apart, and two adjacent longitudinal rib bodies form a group; A cover plate is welded between the sides of two adjacent longitudinal rib bodies away from the panel to form the longitudinal rib; The step of welding the longitudinal rib and the partition plate to the side away from the panel to the transverse partition plate body includes: The side of the partition away from the panel is welded to the transverse partition body; The cover plate is welded to the diaphragm body.

2. The method for manufacturing orthotropic steel bridge decks according to claim 1, characterized in that, The step of welding multiple longitudinal rib bodies to the panel includes: Multiple longitudinal rib bodies are welded to the panel using a multi-head gantry welding machine through double-sided welding; wherein the weld penetration depth between the longitudinal rib body and the panel is more than 80% of the thickness of the longitudinal rib plate.

3. The method for manufacturing orthotropic steel bridge decks according to claim 1, characterized in that, The step of welding a cover plate between two adjacent longitudinal rib bodies on the side away from the panel to form the longitudinal rib includes: The cover plate is welded to the two adjacent longitudinal rib bodies by a multi-head gantry welding machine through single-sided welding; wherein the weld penetration depth between the cover plate and the longitudinal rib body is more than 80% of the thickness of the cover plate.

4. The method for manufacturing orthotropic steel bridge decks according to claim 3, characterized in that, The step of welding the side of the partition away from the panel to the transverse partition body includes: The partition plate is welded to the side of the transverse partition plate body away from the panel by means of applying ceramic backing or carbon arc gouging.

5. The method for manufacturing orthotropic steel bridge decks according to claim 3, characterized in that, The step of welding the cover plate to the diaphragm body includes: The T-shaped joint weld between the diaphragm body and the cover plate is welded; wherein the weld leg size is 5-8mm.

6. The method for manufacturing orthotropic steel bridge decks according to claim 1, characterized in that, The step of providing a partition in the interval between each pair of adjacent longitudinal ribs, and welding the partition to the panel and the two adjacent longitudinal ribs respectively, includes: The partition is welded to the longitudinal rib and the panel respectively using a welding robot or manual welding; wherein the weld leg size is 5-8mm.

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