Steel bridge deck with longitudinal and transverse stiffened ribs

Abstract

The utility model discloses a steel bridge deck with longitudinal stiffening ribs and transverse stiffening ribs. The steel bridge deck comprises a horizontal top plate, the longitudinal stiffening ribs and the transverse stiffening ribs, wherein the longitudinal stiffening ribs and the transverse stiffening ribs are arranged on the bottom face of the horizontal top plate in a crossed mode. The longitudinal stiffening rib is composed of a longitudinal vertical plate which is vertically welded and fixed on the bottom surface of the horizontal top plate and a plurality of horizontal flange plates which are uniformly welded and fixed on the lower edge of the longitudinal vertical plate at intervals, and the transverse stiffening rib is composed of a transverse vertical plate which is vertically welded and fixed on the bottom surface of the horizontal top plate; wherein the transverse vertical plates are vertically crossed with the longitudinal vertical plates between the two adjacent horizontal flange plates, and overwelding holes located in the transverse vertical plates are formed in the crossed positions of the transverse vertical plates and the longitudinal vertical plates. The longitudinal stiffening rib has the advantages that the bending rigidity of the longitudinal stiffening rib is improved, the plate thickness requirement of the longitudinal vertical plate is reduced, the transverse vertical plate forming the transverse stiffening rib can conveniently penetrate through the discontinuous position of the inverted-T-shaped structure in a crossed mode, double-face surrounding welding construction of the longitudinal vertical plate and the transverse vertical plate is achieved, the situation of welding defects is reduced, the welding work amount is reduced, and the construction efficiency is improved. And the anti-fatigue performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure bridges, in particular to a steel bridge deck with longitudinal and transverse stiffeners. Background Technique

[0002] The steel bridge deck is an important component for the bridge to bear loads, and is composed of a top plate and longitudinal and transverse stiffeners welded to the top plate. The longitudinal stiffeners not only require to improve the bearing capacity of the steel bridge deck, but also play a role in preventing the panel from buckling. At this time, it is required that the longitudinal stiffeners have good continuity, so that the longitudinal stiffeners need to pass continuously at the intersection of the longitudinal and transverse stiffeners.

[0003] The existing longitudinal stiffeners have two forms: open-section stiffeners and closed-section stiffeners. The common open-section stiffeners include flat steel plate form and inverted T-section form. The flat steel plate longitudinal rib is a single-plate form stiffener vertically welded to the bottom wall of the top plate. Although it has a simple structure and is convenient for processing and installation, its stiffness is small, and the stiffness can only be improved by increasing the thickness of the rib plate, which is uneconomical; the inverted T-section stiffener will cause too large holes at the intersection with the transverse stiffener, and only additional welded reinforcing rib plates can be used to prevent local instability, resulting in a large increase in the welding workload. The more widely used closed-section stiffeners are mostly inverted trapezoidal, V-shaped or U-shaped structures. Although they have large torsional stiffness and can improve the stress state of the steel bridge deck, they can only be welded from the outside connected to the panel during construction, so welding defects are likely to occur, resulting in fatigue cracking at the weld position. Summary of the Invention

[0004] The purpose of the utility model is to provide a steel bridge deck with longitudinal and transverse stiffeners in view of the defects of the prior art.

[0005] To achieve the above purpose, the utility model can adopt the following technical solutions:

[0006] The steel bridge deck with longitudinal and transverse stiffeners of the utility model includes a horizontal top plate and longitudinal and transverse stiffeners cross-arranged on the bottom surface of the horizontal top plate; the longitudinal stiffeners are composed of longitudinal vertical plates vertically welded to the bottom surface of the horizontal top plate and a plurality of horizontal flange plates evenly and spacedly welded to the lower edge of the longitudinal vertical plates, and the transverse stiffeners are composed of transverse vertical plates vertically welded to the bottom surface of the horizontal top plate; wherein, the transverse vertical plate is vertically crossed with the longitudinal vertical plates between two adjacent horizontal flange plates, and a welding-through hole located on the transverse vertical plate is opened at the intersection of the transverse vertical plate and the longitudinal vertical plate.

[0007] Further, the welding-through hole is directly opposite to the lower part of the plate body of the longitudinal vertical plate, and a disconnection seam is opened on the transverse vertical plate above the welding-through hole and is welded and fixed in fit with the plate wall of the longitudinal vertical plate.

[0008] The advantages of the present utility model are that the horizontal flange plates welded and fixed evenly at intervals along the lower edge of the longitudinal vertical plate can make the entire longitudinal stiffener form an intermittent inverted T-shaped structure. It can not only improve the bending stiffness of the longitudinal stiffener and reduce the requirement for the plate thickness of the longitudinal vertical plate, but also facilitate the transverse vertical plate constituting the transverse stiffener to cross through from the intermittent part of the inverted T-shaped structure, realizing the double-sided fillet welding construction of the longitudinal vertical plate and the transverse vertical plate, reducing the occurrence of welding defects, and without the need to additionally weld reinforcing rib plates, reducing the welding workload, improving the local stability at the intersection of the longitudinal stiffener and the transverse stiffener, not being prone to local stress concentration, improving the fatigue resistance, having a simple structure, being easy to process, and having a broad application prospect. Brief Description of the Drawings

[0009] Figure 1 is a structural schematic diagram of the present utility model.

[0010] Figure 2 is Figure 1 the sectional view taken along the A-A direction in Detailed Embodiment

[0011] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0012] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0013] Such as Figure 1 、 2As shown in the figure, the steel bridge deck with longitudinal and transverse stiffeners of the present utility model includes a horizontal top plate 1 and longitudinal and transverse stiffeners cross - arranged on the bottom surface of the horizontal top plate 1. Specifically, the longitudinal stiffener is composed of longitudinal vertical plates 2 vertically welded to the bottom surface of the horizontal top plate 1 and a plurality of horizontal flange plates 3 evenly and spacedly welded to the lower edge of the longitudinal vertical plates 2. The distance between adjacent two horizontal flange plates 3 is generally about 1 m; the transverse stiffener is composed of a transverse vertical plate 4 vertically welded to the bottom surface of the horizontal top plate 1. The transverse vertical plate 4 is perpendicularly crossed with the longitudinal vertical plates 2 between adjacent two horizontal flange plates 3 (that is, the transverse vertical plate 4 is arranged between adjacent two horizontal flange plates 3). A through - welding hole 5 located on the transverse vertical plate 4 is also provided at the crossing of the transverse vertical plate 4 and the longitudinal vertical plates 2. The through - welding hole 5 is directly opposite to the lower part of the plate body of the longitudinal vertical plate 2. A disconnection seam 6 for fitting and welding with the plate wall of the longitudinal vertical plate 2 is provided on the transverse vertical plate 4 above the through - welding hole 5, so that the longitudinal vertical plate 2 between adjacent two horizontal flange plates 3 can pass through the disconnection seam 6.

[0014] The horizontal flange plates 3 evenly and spacedly welded to the lower edge of the longitudinal vertical plates 2 can make the whole longitudinal stiffener form an intermittent inverted T - shaped structure, improving the bending stiffness of the longitudinal stiffener. Furthermore, there is no need to increase the thickness of the longitudinal vertical plates 2 to improve the bending stiffness. Moreover, it is convenient for the transverse vertical plate 4 forming the transverse stiffener to cross through the intermittent part of the inverted T - shaped structure, realizing the double - sided fillet welding construction of the longitudinal vertical plates 2 and the transverse vertical plates 4, reducing the occurrence of welding defects. At the same time, there is no need to additionally weld reinforcing rib plates, reducing the welding workload, improving the local stability at the crossing of the longitudinal stiffener and the transverse stiffener, not easily causing local stress concentration, improving the fatigue resistance, with a simple structure and convenient processing, and having broad application prospects.

Claims

1. A steel bridge deck with longitudinal and transverse stiffeners, comprising a horizontal top plate and longitudinal and transverse stiffeners cross - arranged on the bottom surface of the horizontal top plate; characterized in that: The longitudinal stiffening rib is composed of a longitudinal vertical plate vertically welded to the bottom surface of the horizontal top plate and a plurality of horizontal flange plates evenly and spacedly welded to the lower edge of the longitudinal vertical plate. The transverse stiffening rib is composed of a transverse vertical plate vertically welded to the bottom surface of the horizontal top plate. Among them, the transverse vertical plate is vertically crossed with the longitudinal vertical plate between two adjacent horizontal flange plates, and a welding-through hole located on the transverse vertical plate is formed at the intersection of the transverse vertical plate and the longitudinal vertical plate.

2. The steel bridge deck with longitudinal and transverse stiffeners according to claim 1, characterized in that: The welding-through hole is directly opposite to the lower part of the plate body of the longitudinal vertical plate, and a disconnection seam that is welded and fixed in fit with the plate wall of the longitudinal vertical plate is formed on the transverse vertical plate above the welding-through hole.

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