Novel composite bridge deck slab structure

Abstract

The utility model discloses a novel composite bridge deck structure which comprises a steel top plate. The first glass reinforcing steel bars and the second glass reinforcing steel bars are arranged on the top edge of the steel top plate, the multiple first glass reinforcing steel bars are arranged in the first direction, and the multiple second glass reinforcing steel bars are arranged in the second direction; the notch rib plates are arranged on the top edge of the steel top plate, and a plurality of notches used for positioning the first glass reinforcing steel bars or the second glass reinforcing steel bars are formed in the notch rib plates; and the ultra-high performance concrete layer is poured on the top edge of the steel top plate, and the ultra-high performance concrete layer covers the steel top plate, the first glass reinforcing steel bars, the second glass reinforcing steel bars and the notch rib plates. The steel-GFRP rib-UHPC composite bridge deck can give full play to the excellent material performance of two high-performance materials, is reasonable in structural stress, excellent in mechanical property and excellent in economic performance, and can be suitable for a large-span steel structure bridge structure.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a novel composite bridge deck structure. Background Art

[0002] In recent years, the state has issued opinions and measures to actively promote the construction and development of steel structure bridges. Steel has good tensile, compressive and ductile properties and is a material with excellent mechanical properties. Therefore, steel bridges with steel as structural materials have the characteristics of light weight, high bearing capacity, high degree of standardization, fast construction speed, high degree of digitization, large spanning capacity, excellent seismic performance, controllable engineering quality and construction risks, etc., which conform to the concept of environmental protection and sustainable development strategy and have strong competitiveness.

[0003] The bridge deck is an important part of the bridge. It directly bears the wheel load of the car and transfers the load to the main beam structure. For conventional span steel bridges, the bridge deck is mainly made of ordinary concrete slabs; when applied to large span steel bridges, orthotropic steel bridge decks are often used. Orthotropic steel bridge decks participate in the main beam force as upper flange plates, which can save steel and have excellent local force performance. Compared with concrete bridge decks, the weight of the structure is reduced by about 40%.

[0004] Orthotropic steel bridge decks are usually paved with asphalt mixtures, with a pavement thickness of 35mm to 80mm. A large number of engineering practices have shown that this type of bridge deck system is prone to fatigue cracking under the action of high-frequency heavy-load vehicles, and the asphalt pavement layer is prone to cracking, rutting, delamination, sliding, and congestion. These diseases have greatly increased the cost of bridge operation and maintenance, are not conducive to driving comfort and safety, and have become a common problem in steel bridges around the world.

[0005] At present, the research on high-performance materials at home and abroad is becoming more and more mature. Fiber-reinforced materials FRP, high-performance concrete ECC, RPC, UHPC, etc. have been used in some engineering projects. Therefore, by making full use of the excellent material properties of high-performance materials, a new composite bridge deck structure with reasonable force, clear force transmission, economical and safe, and convenient construction can be designed to improve the structural force of the steel bridge deck and enhance the overall force performance of the bridge structure, providing new possibilities for further increasing the span of the bridge and providing a new solution to solve the fatigue damage of the steel bridge deck. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a new composite bridge deck structure with reasonable structural design, clear force transmission, economical and safe, and convenient construction, so as to improve the structural stress of the steel bridge deck, enhance the overall stress performance of the bridge structure, provide new possibilities for further increasing the span of the bridge, and provide a new solution for solving the fatigue damage of the steel bridge deck.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A novel composite bridge deck structure, comprising:

[0009] Steel roof;

[0010] A first glass steel bar and a second glass steel bar, wherein the first glass steel bar and the second glass steel bar are both arranged at the top edge of the steel top plate, a plurality of the first glass steel bars are arranged along a first direction, and a plurality of the second glass steel bars are arranged along a second direction;

[0011] A notched rib plate, the notched rib plate being arranged at the top edge of the steel top plate, the notched rib plate being provided with a plurality of notches for positioning the first glass steel bar or the second glass steel bar;

[0012] An ultra-high performance concrete layer is cast on the top edge of the steel top plate, and the ultra-high performance concrete layer covers the steel top plate, the first glass steel bars, the second glass steel bars, and the notched ribs.

[0013] The above-mentioned novel composite bridge deck structure, wherein the notch comprises: a circular hole opened in the middle of the notch rib plate, and an opening opened at the upper end of the circular hole, wherein the opening extends to the upper end of the notch rib plate.

[0014] The above-mentioned novel composite bridge deck structure, wherein one of the first glass steel bar and the second glass steel bar is arranged in the circular hole and has a gap with the steel top plate, and the other of the first glass steel bar and the second glass steel bar is placed on the upper surface of one of the first glass steel bar and the second glass steel bar.

[0015] In the above-mentioned novel composite bridge deck structure, the notched ribs are arranged along the first direction or along the second direction.

[0016] The novel composite bridge deck structure described above, wherein the height of the notch rib is 4 to 6 cm, and the thickness of the notch rib is not less than 10 mm;

[0017] The diameter of the circular hole is 2 to 4 cm.

[0018] The novel composite bridge deck structure mentioned above further comprises:

[0019] T-shaped stiffening ribs, the T-shaped stiffening ribs being welded to the bottom edge of the steel top plate;

[0020] The bulb flat steel stiffening rib is welded to the bottom edge of the steel top plate, and the bulb flat steel stiffening rib is arranged vertically to the T-shaped stiffening rib.

[0021] In the above-mentioned novel composite bridge deck structure, the T-shaped stiffening rib is provided with a through-welding hole for the bulb flat steel stiffening rib to pass through.

[0022] The novel composite bridge deck structure described above, wherein the thickness of the ultra-high performance concrete layer is 6 to 8 cm;

[0023] The spacing between the first glass steel bars and the spacing between the second glass steel bars are both greater than 400 mm.

[0024] In the above-mentioned novel composite bridge deck structure, the first glass steel bars and the second glass steel bars are connected by binding.

[0025] In the above-mentioned novel composite bridge deck structure, an asphalt paving layer is provided on the upper surface of the ultra-high performance concrete layer.

[0026] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0027] (1) The steel-GFRP bar-UHPC composite bridge deck structure of the utility model has a high bearing capacity and strong fatigue resistance in the form of a composite bridge deck in the form of steel-UHPC. The orthotropic bridge deck structure with open rib bulb flat steel reinforcement improves the bearing capacity of the bridge deck while reducing the amount of steel used, and has outstanding economic performance. The fiber-reinforced composite material GFRP bars are used instead of steel bars to enhance the bonding performance between UHPC and the bars. The GFRP bars are sparsely arranged, which is convenient for vibration construction and enhances the compactness of UHPC casting. The shear connector is arranged in the form of longitudinal notch ribs + GFRP bars. The notch-type shear connector enhances the bonding performance and overall performance between steel and UHPC, and is also convenient for steel bar perforation construction. The notch ribs and GFRP bars are accurately positioned, and the notch ribs and steel top plates are simply welded, which ensures the welding quality of the bridge deck and enhances the stiffness of the bridge deck. At the same time, the steel top plate also serves as the UHPC casting bottom plate, eliminating the need for construction templates and reducing construction difficulty. The steel-GFRP bar-UHPC composite bridge deck can give full play to the excellent material properties of the two high-performance materials. It has reasonable structural stress, excellent mechanical properties, and superior economic performance. It can be applied to large-span steel bridge structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figures 1 to 3 It is a schematic diagram of the novel composite bridge deck structure of the utility model.

[0029] Figure 4 The utility model is a novel composite bridge deck structure Figure 1 A partial enlarged schematic diagram of .

[0030] Figures 5 to 7It is a schematic diagram of another possible embodiment of the novel composite bridge deck structure of the utility model.

[0031] In the attached figure: 1, steel top plate; 2, first glass steel bar; 3, second glass steel bar; 4, notched rib plate; 41, round hole; 42, opening; 5, ultra-high performance concrete layer; 6, T-shaped stiffening rib; 61, through-weld hole; 7, bulb flat steel stiffening rib. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0033] See also Figures 1 to 7 As shown, a novel composite bridge deck structure of a preferred embodiment is shown, including: a steel top plate 1, a first glass steel bar 2 and a second glass steel bar 3 (GFRP, Glass Fiber Reinforced Plastics, reinforced plastics with glass fiber or its products as reinforcement materials, called glass fiber reinforced plastics, or called glass fiber reinforced plastics), the first glass steel bar 2 and the second glass steel bar 3 are both arranged at the top edge of the steel top plate 1, a plurality of first glass steel bars 2 are arranged along a first direction, and a plurality of second glass steel bars 3 are arranged along a second direction.

[0034] Furthermore, as a preferred embodiment, the new composite bridge deck structure also includes: a notched rib 4, the notched rib 4 (PBL, platform flat beam) is arranged at the top edge of the steel top plate 1, and the notched rib 4 is provided with a plurality of notches for positioning the first glass steel bar 2 or the second glass steel bar 3.

[0035] Furthermore, as a preferred embodiment, the new composite bridge deck structure also includes: an ultra-high performance concrete layer 5 (UHPC, Ultra-High Performance Concrete), the ultra-high performance concrete layer 5 is cast on the top edge of the steel top plate 1, and the ultra-high performance concrete layer 5 covers the steel top plate 1, the first glass steel bars 2 and the second glass steel bars 3, and the groove ribs 4.

[0036] Preferably, the first glass steel bar 2 and the second glass steel bar 3 are arranged vertically, and the notch rib 4 is arranged parallel to one of the first glass steel bar 2 and the second glass steel bar 3 .

[0037] Preferably, the first glass steel bar 2 is a transverse bar, the second glass steel bar 3 is a longitudinal bar, the second glass steel bar 3 is arranged between two adjacent notch ribs 4 and is tied to the first glass steel bar 2 .

[0038] Specifically, the spacing, thickness, opening diameter, and opening spacing of the notch ribs 4 can be determined according to actual conditions.

[0039] Specifically, the transverse arrangement of the first glass steel bar 2 matches the opening spacing of the notch rib 4, the diameters of the first glass steel bar 2 and the second glass steel bar 3 can be determined according to actual conditions, and the spacing of the second glass steel bar 3 can be determined according to actual conditions.

[0040] Preferably, the composite bridge deck is constructed by cast-in-place to increase the overall performance of the structure, and the steel top plate 1 serves as a supporting base plate for pouring the ultra-high performance concrete layer 5, with a simple construction process and a fast construction speed.

[0041] Further, as a preferred embodiment, the notch includes: a circular hole 41 opened in the middle of the notch rib plate, and an opening 42 opened at the upper end of the circular hole 41 , wherein the opening 42 extends to the upper end of the notch rib plate 4 .

[0042] Further, as a preferred embodiment, one of the first glass steel bar 2 and the second glass steel bar 3 is arranged in the circular hole 41 and has a gap with the steel top plate 1, and the other of the first glass steel bar 2 and the second glass steel bar 3 is placed on the upper surface of one of the first glass steel bar 2 and the second glass steel bar 3.

[0043] Further, as a preferred embodiment, the notched ribs 4 are arranged along the first direction or along the second direction, which is specifically determined according to the stress characteristics of the bridge deck.

[0044] For details, see Figures 1 to 4 As shown, in this embodiment, the notch ribs 4 are arranged from the lower left to the upper right in the figure, the first glass steel bar 2 is arranged in the circular hole 41 of the notch ribs 4, and the second glass steel bar 3 is tied to the upper surface of the first glass steel bar 2. On the other hand, see Figures 5 to 7 As shown, in this embodiment, the notch ribs 4 are arranged from the upper left to the lower right in the figure, the second glass steel bars 3 are arranged in the circular holes 41 of the notch ribs 4, and the first glass steel bars 2 are tied to the upper surface of the second glass steel bars 3.

[0045] Further, as a preferred embodiment, the height of the notch rib 4 is 4 to 6 cm, and the thickness of the notch rib 4 is not less than 10 mm.

[0046] Furthermore, as a preferred embodiment, the diameter of the circular hole 41 is 2 to 4 cm.

[0047] Furthermore, as a preferred embodiment, the novel composite bridge deck structure further includes: T-shaped stiffening ribs 6 , and the T-shaped stiffening ribs 6 are welded to the bottom edge of the steel top plate 1 .

[0048] Further, as a preferred embodiment, the novel composite bridge deck structure further comprises: bulb flat steel stiffening ribs 7, the bulb flat steel stiffening ribs 7 are welded to the bottom edge of the steel top plate 1, and the bulb flat steel stiffening ribs 7 are arranged vertically with the T-shaped stiffening ribs 6. Specifically, the bulb flat steel stiffening ribs 7 use less steel.

[0049] In this embodiment, fiber reinforced composite material GFRP bars (i.e., the first glass steel bars 2 and the second glass steel bars 3) are used to replace the existing steel bars arranged longitudinally and transversely, and the notched ribs 4 are arranged longitudinally / transversely as the top edge shear connectors of the steel top plate 1. The bottom edge of the steel top plate 1 is an orthotropic bridge deck reinforced with bulb flat steel, and an ultra-high performance concrete layer 5 is poured on the top layer of the steel top plate 1 to form a steel-GFRP bar-UHPC composite bridge deck structure.

[0050] The steel-GFRP bar-UHPC composite bridge deck structure of this embodiment utilizes the excellent material properties of GFRP bars and UHPC to improve the bearing capacity and fatigue resistance of the composite bridge deck. The orthogonal anisotropic bridge deck structure reinforced with bulb flat steel and sparsely arranged GFRP bars effectively reduce the amount of GFRP bars and steel while ensuring the structural stress, and has outstanding economic performance. The notched rib shear connector method increases the stiffness of the bridge deck, the bonding performance of UHPC and GFRP bars, and enhances the overall performance of the bridge deck.

[0051] Furthermore, as a preferred embodiment, the T-shaped stiffening rib 6 is provided with a through-welding hole 61 for the bulb flat steel stiffening rib 7 to pass through.

[0052] Specifically, the thickness, height and spacing of the bulb flat steel stiffening ribs 7 are determined according to actual conditions, and the web thickness, bottom plate thickness, stiffening rib height, spacing and longitudinal through-welding hole form of the T-shaped stiffening ribs 6 are determined according to actual conditions.

[0053] Furthermore, as a preferred embodiment, the thickness of the ultra-high performance concrete layer 5 is 6 to 8 cm.

[0054] Further, as a preferred embodiment, the first glass steel bars 2 and the second glass steel bars 3 are sparsely arranged. Specifically, the spacing between the first glass steel bars 2 and the spacing between the second glass steel bars 3 are 400 mm. According to the actual situation, the spacing between the first glass steel bars 2 and the spacing between the second glass steel bars 3 can be further increased.

[0055] Further, as a preferred embodiment, the first glass steel bar 2 and the second glass steel bar 3 are connected by binding.

[0056] Furthermore, as a preferred embodiment, an asphalt paving layer is provided on the upper surface of the ultra-high performance concrete layer 5 .

[0057] Preferably, the composite bridge deck can be used as a permanent structure, and the asphalt pavement layer on top of the ultra-high performance concrete layer 5 can be directly laid during later operation and maintenance.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel composite bridge deck structure, characterized in that: include: Steel roof; A first glass steel bar and a second glass steel bar, wherein the first glass steel bar and the second glass steel bar are both arranged at the top edge of the steel top plate, a plurality of the first glass steel bars are arranged along a first direction, and a plurality of the second glass steel bars are arranged along a second direction; A notched rib plate, the notched rib plate being arranged at the top edge of the steel top plate, the notched rib plate being provided with a plurality of notches for positioning the first glass steel bar or the second glass steel bar; An ultra-high performance concrete layer is cast on the top edge of the steel top plate, and the ultra-high performance concrete layer covers the steel top plate, the first glass steel bars, the second glass steel bars, and the notched ribs.

2. The novel composite bridge deck structure according to claim 1 is characterized in that: The notch includes: a circular hole opened in the middle of the notch rib plate, and an opening opened at the upper end of the circular hole, wherein the opening extends to the upper end of the notch rib plate.

3. The novel composite bridge deck structure according to claim 2 is characterized in that: One of the first and second glass steel bars is disposed in the circular hole with a gap between the first and second glass steel bars and the steel top plate, and the other of the first and second glass steel bars is placed on the upper surface of the one of the first and second glass steel bars.

4. The novel composite bridge deck structure according to claim 2 is characterized in that: The notch ribs are arranged along the first direction or along the second direction.

5. The novel composite bridge deck structure according to claim 2 is characterized in that: The height of the notch rib is 4 to 6 cm, and the thickness of the notch rib is not less than 10 mm; The diameter of the circular hole is 2 to 4 cm.

6. The novel composite bridge deck structure according to claim 1 is characterized in that: Also includes: T-shaped stiffening ribs, the T-shaped stiffening ribs being welded to the bottom edge of the steel top plate; The bulb flat steel stiffening rib is welded to the bottom edge of the steel top plate, and the bulb flat steel stiffening rib is arranged vertically to the T-shaped stiffening rib.

7. The novel composite bridge deck structure according to claim 6 is characterized in that: The T-shaped stiffening rib is provided with a through-welding hole for the bulb flat steel stiffening rib to pass through.

8. The novel composite bridge deck structure according to claim 1 is characterized in that: The thickness of the ultra-high performance concrete layer is 6 to 8 cm; The spacing between the first glass steel bars and the spacing between the second glass steel bars are both greater than 400 mm.

9. The novel composite bridge deck structure according to claim 1, characterized in that: The first glass steel bar and the second glass steel bar are connected by binding.

10. The novel composite bridge deck structure according to claim 1, characterized in that: An asphalt paving layer is provided on the upper surface of the ultra-high performance concrete layer.

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