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Double-rib type longitudinal rib and bridge deck structure

A longitudinal rib and integrated technology, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as poor fatigue resistance, achieve excellent longitudinal force transmission performance, extend longitudinal bridge stress influence lines, and diversify connection methods Effect

Pending Publication Date: 2022-07-15
ZHEJIANG CTB WAVEFORM STEEL WEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This application aims at the defect of poor fatigue resistance of existing longitudinal ribs and steel bridge decks, and provides a new double-rib longitudinal rib and the The bridge deck structure, through the connection of ear plates, releases the strain on one side and improves the fatigue resistance. At the same time, the other side of the ear plates uses the connection of adjacent closed ribs, that is, without increasing the number of connections, adding open ribs as auxiliary Ribs play a role in further strengthening the structure

Method used

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  • Double-rib type longitudinal rib and bridge deck structure
  • Double-rib type longitudinal rib and bridge deck structure
  • Double-rib type longitudinal rib and bridge deck structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like figure 2 , 3 As shown, Embodiment 1 of the present application is a double-rib type longitudinal rib 1 , which includes a closed rib 11 , an open rib 12 and an ear plate 13 , and the closed rib 11 and the open rib 12 are connected by the lug plate 13 . The closing rib 11 includes a pair of symmetrical side webs 111 and a bottom edge 112 connecting the lower ends of the pair of side webs 111 . The upper end of the side web 111 on one side of the closed rib 11 has an outwardly folded ear plate 13. One end of the ear plate 13 is connected to the upper end of the side web 111, and the other end is connected to the upper end of the open rib 12. The ear plate 13 is along the length of the longitudinal rib 1. A plurality of connection holes 131 are opened in the direction. like Figure 4 As shown, the ear plate 13 and the side web plate 111 have a first rotation angle α, and 90°≤α≤135°, the opening rib 12 is formed by folding the outer end of the ear plate 13, and the...

Embodiment 2

[0052] like Figure 7 , 8 As shown, Embodiment 2 of the present application provides another double-ribbed longitudinal rib 1 of a bridge deck structure. The difference from Embodiment 1 is that both sides of the closed rib 11 of the longitudinal rib 1 are provided with lugs 13 and open ribs 12. .

[0053] Under the premise of not increasing the amount of welding, in the second embodiment of the present application, the two side webs 111 of the closed rib 11 are continuously bent twice to form the ear plate 13 and the open rib 12, which is equivalent to the two sides of the closed longitudinal rib 1. Two open ribs are added on the side, which significantly improves its longitudinal bending and torsional rigidity, prolongs the longitudinal stress influence line of the longitudinal bridge, and makes the longitudinal force transmission performance of longitudinal rib 1 better.

[0054] Using the bridge deck structure of the longitudinal ribs 1, since the side webs 111 on the ad...

Embodiment 3

[0057] like Figure 10 As shown, Embodiment 3 of the present application provides a case where a double-rib longitudinal rib 1 is used for a composite structural bridge deck. The closed rib 11 has a trapezoidal cross-section, the open rib 12 has a lower flange 121, and the lower flange 121 is formed by folding the lower end of the open rib 12. The setting of the lower flange 121 further increases the cross-sectional moment of inertia of the open rib 12, thereby increasing the open rib 12 bending and torsion resistance. The upper surface of the top plate 2 is laid with a reinforced concrete layer, and the connecting hole 131 of the lug plate 13 is provided with a connecting piece 3. The connecting piece 3 is a high-strength bolt, which is connected with the top plate 2 by bolt connection. Concrete anchoring, especially suitable for steel-concrete composite deck structures.

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Abstract

The invention discloses a longitudinal rib and a welding structure of the longitudinal rib and a top plate. The problems that in the prior art, a full-length linear welding seam of the longitudinal rib and the top plate is prone to fatigue cracking and the like are solved. According to the technical scheme, the longitudinal rib is provided and at least comprises a web plate, the upper edge of the web plate is provided with a lug plate folded towards one side, the web plate and the lug plate form a corner beta, and the corner beta is larger than or equal to 90 degrees and smaller than 134 degrees; meanwhile, the invention provides a welding structure of the longitudinal ribs and the top plate, the virtual width of welding seams is increased, the welding seams are arranged in the longitudinal direction and the transverse direction in a plane, the various strain capacity of the welding seams for bearing complex loads in all directions is improved, the welding seams are located on the outer edges, and the welding seams are not prone to deformation. And the fatigue cracking probability of the welding seam is greatly reduced far away from a stress sensitive area.

Description

technical field [0001] The present application relates to the field of orthotropic bridge deck structures, in particular to a novel longitudinal rib and bridge deck structure. Background technique [0002] Orthotropic bridge deck structure is a type of plate structure that mainly connects the roof, longitudinal ribs and transverse rib diaphragms to meet different force requirements in the longitudinal and transverse directions by welding connections. . The lateral stiffness requirement is relatively small, and a transverse rib partition is arranged at certain distances to achieve the purpose of reducing the dead weight of the structure. Orthotropic bridge deck structures are widely used in bridge deck systems, especially long-span bridges, due to their light weight and large bearing capacity. [0003] Although the orthotropic bridge deck structure has many advantages, its fatigue cracking problem has been difficult to solve. How to improve the durability of the orthotropi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/00E01D19/12E01D101/30
CPCE01D2/00E01D19/125E01D2101/30
Inventor 孙天明邱红光
Owner ZHEJIANG CTB WAVEFORM STEEL WEB
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