J-shaped open-web stiffened steel bridge deck

Abstract

The utility model discloses a J type open web stiffening steel bridge deck panel, including, curved circular arc female board, a plurality of groups of lattice type longitudinal rib web group and a plurality of patching plates, and each group of lattice type longitudinal rib web group includes two open J type longitudinal rib web of setting along the female board radial, and the root end of longitudinal rib web is welded through double -faced weld joint with female board, and the tail end is suspended and sets, and the two longitudinal rib web of each group of lattice type longitudinal rib web group is relatively arranged. The tail end fixed connection of at least two longitudinal rib web of each patching plate, and the projection extension direction of patching plate in horizontal direction is perpendicular with the projection extension direction of longitudinal rib web in horizontal direction. The root end minimum interval of two groups of lattice type longitudinal rib web group adjacent is equal with the root end interval of two longitudinal rib web of each group of lattice type longitudinal rib web group. The J type open web stiffening steel bridge deck panel of the utility model discloses as curved circular arc shape steel bridge deck panel, can correct its deformation through the mode of flame correction while having stronger rigidity and compression stability.

Description

Technical Field

[0001] This utility model relates to the field of steel bridge deck technology, and in particular to a J-shaped hollow stiffened steel bridge deck. Background Technology

[0002] Orthotropic steel bridge decks are an indispensable key component of modern steel structure bridges, especially long-span cable-stayed bridges. They are composite steel structure panels with different mechanical properties in two mutually perpendicular directions, and are characterized by high material utilization, light weight, large ultimate bearing capacity and short construction period.

[0003] To improve the aesthetics of bridges, the base plates of orthotropic steel bridge decks are currently transitioning to curved arc shapes. Curved arc-shaped orthotropic steel bridge decks require each plate to have the same radius of curvature, which is typically corrected using flame straightening to correct variations in the curved arc-shaped orthotropic steel plates. Curved arc-shaped orthotropic steel bridge decks also need to simultaneously meet requirements for high stiffness and compressive stability.

[0004] However, while open-ribbed orthotropic steel bridge decks can be flame-stressed in existing technologies, their bending stiffness, torsional stiffness, and compressive stability are relatively weak. For closed-ribbed orthotropic steel bridge decks, the limited internal space prevents manual welding of the inner side of the closed rib to the base plate; only the outer side of the rib web can be welded. This leads to eccentric stress on the weld seam under wheel loads, making the weld prone to fatigue cracking. Furthermore, the high overall stiffness of closed-ribbed orthotropic steel plates makes it difficult to correct deformation through flame straightening, thus limiting their applicability to curved orthotropic steel bridge decks where high aesthetic requirements are present. Utility Model Content

[0005] Based on this, it is necessary to provide a J-type hollow stiffened steel bridge deck to address the above-mentioned technical problems. As a curved arc-shaped steel bridge deck, it has strong rigidity and compressive stability, and its deformation can be corrected by flame straightening.

[0006] This utility model provides a J-type hollow stiffened steel bridge deck, comprising: Curved arc-shaped mother plate; Multiple sets of lattice-type longitudinal rib web plates, each set of lattice-type longitudinal rib web plates includes two open J-shaped longitudinal rib web plates arranged radially along the mother plate. The root end of the longitudinal rib web plate is welded to the mother plate by double-sided welds, and the tail end is suspended. The two longitudinal rib web plates of each set of lattice-type longitudinal rib web plates are arranged opposite each other. Several lacing plates, each lacing plate being fixedly connected to the tail ends of at least two longitudinal rib webs, wherein the projection extension direction of the lacing plate in the horizontal direction is perpendicular to the projection extension direction of the longitudinal rib webs in the horizontal direction. The minimum distance between the root ends of two adjacent sets of latticed longitudinal rib webs is equal to the distance between the root ends of the two longitudinal rib webs in each set of latticed longitudinal rib webs.

[0007] In one embodiment, the lacing plate is an arc-shaped strip, and the curvature of the lacing plate is the same as that of the mother plate.

[0008] In one embodiment, several gusset plates are fixedly connected to the tail ends of all longitudinal rib webs and are arranged at equal intervals.

[0009] In one embodiment, several lacing plates are arranged in multiple groups along the extension direction of the longitudinal rib web. Each group of lacing plates includes the same number of lacing plates as the lattice longitudinal rib web groups. Each lacing plate in each group is fixedly connected to two longitudinal rib webs belonging to the same group.

[0010] The beneficial effects of this embodiment are: (1) The present invention connects the independent open J-shaped longitudinal rib web plates at the top to form an integral lattice system by means of gusset plates, which greatly improves the overall bending stiffness, torsional stiffness and compressive stability of the steel bridge deck. (2) The web of the J-type longitudinal rib is open, which provides ample operating space for double-sided welding with the base plate, fundamentally solving the problem of eccentric stress in single-sided welding of closed ribs and improving fatigue life. (3) Before welding the transverse ribs, the longitudinal rib web plate is welded to the mother plate to form an open rib state, with low stiffness and good flexibility, which makes it easy to correct its irregular deformation by flame straightening; after adjusting the shape, the transverse ribs are then welded to make the structure obtain the final high stiffness and high strength. The steel bridge deck of this utility model can solve the manufacturing problem of curved closed rib bridge deck. Attached Figure Description

[0011] Figure 1 The gusset plate provided in this embodiment of the utility model is a continuous J-shaped hollow stiffened steel bridge deck; Figure 2 The gusset plate provided in this embodiment of the utility model is a split J-shaped hollow stiffened steel bridge deck.

[0012] Explanation of reference numerals in the attached drawings: 100, mother plate; 200, longitudinal rib web; 300, lacing plate. Detailed Implementation

[0013] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0014] It should be noted that in the description of this utility model, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] In one embodiment, such as Figure 1 and Figure 2 As shown, the J-type hollow stiffened steel bridge deck of this embodiment includes: Curved arc-shaped motherboard 100.

[0016] The system comprises multiple sets of lattice-structured longitudinal rib webs. Each set includes two open J-shaped longitudinal rib webs 200 arranged radially along the mother plate 100. The root end of each longitudinal rib web 200 is welded to the mother plate 100 via a double-sided weld, while the tail end is suspended. The two longitudinal rib webs 200 in each set are arranged opposite to each other. The open design of the longitudinal rib webs 200 provides ample operating space for double-sided welding to the mother plate 100, fundamentally solving the eccentric stress problem of single-sided welding of closed ribs and improving fatigue life.

[0017] Several gusset plates 300 are provided, each gusset plate 300 being fixedly connected to the tail ends of at least two longitudinal rib webs 200. The horizontal projection extension direction of the gusset plate 300 is perpendicular to the horizontal projection extension direction of the longitudinal rib webs 200. The independent open longitudinal rib webs 200 are connected at the top by transverse ribs to form an integral lattice system, which greatly improves the overall bending stiffness, torsional stiffness, and compressive stability of the steel bridge deck.

[0018] Specifically, the 300mm gusset plate is a flat plate. Its processing and installation are simpler, which helps improve construction efficiency and reduce overall costs.

[0019] If the minimum distance between the roots of two adjacent sets of latticed longitudinal rib webs is equal to the distance between the roots of the two longitudinal rib webs 200 in each set of latticed longitudinal rib webs, then all longitudinal webs are equally spaced at their roots. With all longitudinal rib webs equally spaced at their roots, the load transfer path on the parent plate 100 will be more uniform and regular. Each longitudinal rib web bears a similar load share, avoiding localized stress concentration and reducing the risk of fatigue cracks.

[0020] In this embodiment, the J-type hollow stiffened steel bridge deck has an open rib state after the longitudinal rib web 200 is welded to the curved arc-shaped mother plate 100 before the transverse ribs are welded. It has low stiffness and good flexibility, and is easy to correct its irregular deformation by flame straightening. After the shape is adjusted, the transverse ribs are then welded to give the structure the final high stiffness and high strength. The steel bridge deck of this utility model can solve the manufacturing problem of curved closed rib bridge deck.

[0021] In one embodiment, the lacing plate 300 is an arc strip, and the arc of the lacing plate 300 is the same as that of the mother plate 100. Thus, the lacing plate 300 is easy to install and saves material costs, while being able to effectively fit with the longitudinal rib web plate 200 and having a high degree of concentration relative to the mother plate 100.

[0022] In one embodiment, several gusset plates 300 are fixedly connected to the tail ends of all longitudinal rib webs 200 and are arranged at equal intervals. The continuous integral gusset plate structure 300 forms a more complete force-bearing system, provides better in-plane stiffness, and effectively constrains the deformation coordination of each longitudinal rib web 200. At the same time, the processing and installation of the gusset plates 300 are simpler, which helps to improve construction efficiency and reduce overall cost.

[0023] In one embodiment, a plurality of gusset plates 300 are arranged in multiple arrays along the extension direction of the longitudinal rib web 200. Each array of gusset plates 300 includes the same number of gusset plates 300 as the lattice longitudinal rib web 200. Each gusset plate 300 in each array is fixedly connected to two longitudinal rib webs 200 belonging to the same array. The arrayed, separate gusset plates 300 minimize the amount of transverse rib material used while ensuring necessary stiffness and stability, achieving a lightweight design. Simultaneously, the separate gusset plates 300 provide necessary inspection and maintenance channels for the bridge deck interior, improving the maintainability of the structure.

[0024] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A J-shaped hollow stiffened steel bridge deck, characterized in that, include: Curved arc-shaped mother plate (100); Multiple sets of lattice-type longitudinal rib web plates are provided. Each set of lattice-type longitudinal rib web plates includes two open J-shaped longitudinal rib web plates (200) arranged radially along the mother plate (100). The root end of the longitudinal rib web plate (200) is welded to the mother plate (100) by double-sided welds, and the tail end is suspended. The two longitudinal rib web plates (200) of each set of lattice-type longitudinal rib web plates are arranged opposite to each other. A plurality of gusset plates (300), each of the gusset plates (300) being fixedly connected to the tail ends of at least two longitudinal rib webs (200), wherein the projection extension direction of the gusset plate (300) in the horizontal direction is perpendicular to the projection extension direction of the longitudinal rib webs (200) in the horizontal direction. The minimum distance between the root ends of two adjacent sets of latticed longitudinal rib webs is equal to the distance between the root ends of the two longitudinal rib webs (200) of each set of latticed longitudinal rib webs.

2. The J-type hollow stiffened steel bridge deck according to claim 1, characterized in that, The lacing plate (300) is an arc strip, and the arc of the lacing plate (300) is the same as that of the mother plate (100).

3. The J-type hollow stiffened steel bridge deck according to claim 2, characterized in that, Several gusset plates (300) are fixedly connected to the tail ends of all longitudinal rib web plates (200) and are set at equal intervals.

4. The J-type hollow stiffened steel bridge deck according to claim 2, characterized in that, Several lacing plates (300) are arranged in multiple groups along the extension direction of the longitudinal rib web (200). Each group of lacing plates (300) includes the same number of lacing plates (300) as the lattice longitudinal rib web (200). Each lacing plate (300) in each group is fixedly connected to two longitudinal rib webs (200) belonging to the same group.

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