Glass fiber reinforced composite material node construction device of highway-railway dual-purpose truss girder bridge

Abstract

The utility model discloses a glass fiber reinforced composite node construction device of a highway-railway dual-purpose truss girder bridge. The glass fiber reinforced composite node construction device comprises a glass fiber reinforced composite perforated plate shear connecting piece, a glass fiber reinforced composite truss web member and twisted steel, a glass fiber reinforced composite material rib penetrates through a hole of the glass fiber reinforced composite material perforated plate shear connector; concrete is poured into the glass fiber reinforced composite truss web member, and glass fiber reinforced composite positioning plates are arranged at the two ends of the glass fiber reinforced composite truss web member and used for positioning the twisted steel with the nuts, so that the twisted steel is located in the center of the glass fiber reinforced composite truss web member. And the glass fiber reinforced composite truss web member is connected with the glass fiber reinforced composite positioning plate through gluing and is connected with the glass fiber reinforced composite perforated plate shear connecting piece through a high-strength bolt. Compared with a traditional steel joint, corrosion resistance and fatigue resistance are improved, component prefabrication and field assembly are convenient, construction is facilitated, and the construction period is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to truss bridge engineering field especially relates to a glass fiber reinforced composite material node structure device of public railway truss girder bridge. BACKGROUND

[0002] The node is an extremely important component in the truss bridge, which connects the web members with the concrete top and bottom plate into a whole. However, the node in the traditional road bridge generally adopts the combination of steel web members and steel perforated plate, and the steel bars are penetrated in the holes of the perforated plate, which inevitably causes the problem of corrosion between the steel bars and the steel materials.

[0003] In some areas, the active truss bridges, especially the railway bridges, have different degrees of corrosion phenomenon due to the long-term influence of cold air corrosion environment, which seriously threatens the safety of people's life and property and directly causes hundreds of millions of economic losses.

[0004] The truss bridges of railways and highways inevitably produce different types of cracks due to various defects in the process of processing, manufacturing and daily use, among which the corrosion fatigue cracks developed from corrosion pits have a particularly significant impact on the bridges. For the railway and highway truss bridges exposed to the natural environment for a long time, the load applied by the train during driving will cause the structure to bear the cyclic stress and be affected by the corrosion environment, which makes the existing cracks rapidly expand and eventually leads to the sudden fracture of the components or even the overall corrosion fatigue failure.

[0005] For example, in some areas, the active truss bridges, especially the railway bridges, have different degrees of corrosion phenomenon due to the long-term influence of cold air corrosion environment, which seriously threatens the safety of people's life and property and directly causes hundreds of millions of economic losses. Therefore, the corrosion fatigue cracks have become a major hidden danger for the safe use of railway and highway truss bridges, and it is necessary to study the expansion and residual life of such cracks to ensure the safety and normal operation of the railway and highway truss bridges.

[0006] Although a large number of researches have been carried out on the safety and stability of the truss bridges and a series of remarkable achievements have been made, no improvement measures related to the node structure have been proposed for the corrosion resistance of the truss bridges. Currently, the nodes of the truss bridges usually use steel or aluminum alloy, which are prone to corrosion in humid, salt fog and extremely cold environments. Although the use of corrosion-resistant coating has been proved to have good corrosion resistance, the coating may fail due to physical damage or aging.

[0007] Furthermore, finite element analysis is used to optimize and improve key connections in the nodal truss structure, reducing stress concentration and preventing weak points at the connections. However, the complex connection design leads to excessively high requirements for construction processes, making it difficult for the final coating to cover the structure, especially at welded or bolted connections, where rust can easily accumulate. Due to cost considerations, new nodal components often use materials with poor corrosion resistance or simplify anti-corrosion measures, resulting in insufficient corrosion resistance.

[0008] In recent years, breakthroughs have been made in the bonding technology between FRP and other materials (such as steel or concrete), and it has shown stronger corrosion resistance in humid, salt spray, and extremely cold environments. However, its performance may be affected in high-temperature or extreme environments, and fire resistance and temperature resistance must also be considered during use. Therefore, it is essential to use node structures with greater durability and lower cost. Utility Model Content

[0009] Purpose of the utility model: In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a glass fiber reinforced composite material joint structure device for dual-purpose road and rail truss bridges, thereby improving the problem of easy corrosion of current truss bridge joints, reducing the repair and maintenance costs of truss bridges, and improving the durability of truss bridges.

[0010] Technical solution: The glass fiber reinforced composite material node structure device for a dual-purpose road-rail truss bridge of this utility model includes a glass fiber reinforced composite material perforated plate shear connector, a glass fiber reinforced composite material truss web member, and threaded steel bars; the glass fiber reinforced composite material perforated plate shear connector is composed of two parallel Y-shaped connecting plates;

[0011] The connecting plate includes an end, a first connecting foot, and a second connecting foot. Bolt holes are provided on the first connecting foot, the second connecting foot, and the glass fiber reinforced composite truss web. The two first connecting feet fix the glass fiber reinforced composite truss web through the bolt holes. The two second connecting feet fix the glass fiber reinforced composite truss web through the bolt holes. There are rib holes distributed on the two ends, and glass fiber reinforced composite ribs are fixed through the rib holes.

[0012] The glass fiber reinforced composite truss web is a cuboid with one open end; the glass fiber reinforced composite truss web includes a first end face and a side face, the first end face is provided with a glass fiber reinforced composite positioning plate, and bolt holes for through-threaded steel bars are opened at the center of the first end face and on the glass fiber reinforced composite positioning plate; the glass fiber reinforced composite truss web is filled with concrete.

[0013] A glass fiber reinforced composite positioning plate extends vertically from the first end face and is fixed to the side of the glass fiber reinforced composite strut.

[0014] The glass fiber reinforced composite positioning plate is vertically extended from the first end face and is fixed on the side of the glass fiber reinforced composite web member by gluing.

[0015] The bolt hole of the glass fiber reinforced composite positioning plate is fixed by gluing at the contact position with the threaded steel bar.

[0016] The glass fiber reinforced composite positioning plate is fixed by gluing at the first end face.

[0017] The first connecting leg and the second connecting leg are fixed by gluing at the glass fiber reinforced composite web member.

[0018] High-strength bolts are installed in the bolt holes of the first connecting leg and the second connecting leg.

[0019] The threaded steel bar is sleeved with a nut, thereby enhancing the connecting performance between the finished threaded steel bar and the concrete.

[0020] The side body of the glass fiber reinforced composite web member is integrally formed by bending the connecting plate.

[0021] The first end face is sealingly connected with the side body, thereby facilitating the pouring of the concrete.

[0022] Working principle: the node structure device of the utility model is made of a GFRP material to form a perforated plate shear connector, the GFRP bar is penetrated in the perforated plate shear connector, and the web member is made of a GFRP web member. The GFRP web member is filled with concrete, and the two ends are provided with GFRP positioning plates for accurate positioning of the finished threaded steel bar with a nut, so that the finished threaded steel bar is always positioned at the center of the GFRP web member.

[0023] Advantages: compared with the prior art, the utility model has the following advantages:

[0024] (1) the node structure device of the utility model has corrosion resistance and durability, and the elastic performance of the node structure device is good, and the node structure device has the advantages of fatigue resistance.

[0025] (2) in the utility model, each component of the node structure device is prefabricated and assembled on site, thereby avoiding welding, facilitating construction and shortening the construction period.

[0026] (3) the perforated plate shear connector, the penetrating bar and the web member in the utility model are made of GFRP material, which has strong corrosion resistance and fatigue resistance compared with traditional steel materials; the GFRP material is light in weight, high in strength, strong in fatigue resistance and corrosion resistance, and is light and easy to transport and install, thereby facilitating faster construction process and helping to shorten the construction period. The application of the GFRP material to the web member of the truss bridge node structure improves the problem of easy corrosion of the current truss bridge node.

[0027] (4) The GFRP positioning plate in this utility model ensures that the anchored fine-rolled threaded steel bars are always at the center of the GFRP truss web. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the glass fiber reinforced composite material node structure device for a dual-purpose road-rail truss bridge of this utility model.

[0029] Figure 2 for Figure 1 Side view;

[0030] Figure 3 This is a top view of the glass fiber reinforced composite material node structure device for a dual-purpose road-rail truss bridge according to this utility model. Detailed Implementation

[0031] like Figure 1 As shown, the glass fiber reinforced polymer (GFRP) joint structure device for a dual-purpose road-rail truss bridge of this utility model includes a glass fiber reinforced polymer perforated plate shear connector 1, a glass fiber reinforced polymer truss web member 4, and threaded steel bars 5; the glass fiber reinforced polymer perforated plate shear connector 1 is composed of two parallel Y-shaped connecting plates 11.

[0032] The connecting plate 11 includes an end 111, a first connecting leg 112, and a second connecting leg 113. Bolt holes are provided on the first connecting leg 112, the second connecting leg 113, and the glass fiber reinforced composite truss web 4. The two first connecting legs 112 are fixed to the glass fiber reinforced composite truss web 4 through the bolt holes. The two second connecting legs 113 are fixed to the glass fiber reinforced composite truss web 4 through the bolt holes. Several holes are distributed on the two ends 111 as through-rib holes, and glass fiber reinforced composite ribs 2 are fixed through the holes.

[0033] The glass fiber reinforced composite truss web member 4 is a cuboid with one open end; the glass fiber reinforced composite truss web member 4 includes a first end face 41 and a side body, a glass fiber reinforced composite positioning plate 6 is provided on the first end face 41, and bolt holes for through threaded steel bars 5 are opened at the center of the first end face 41 and on the glass fiber reinforced composite positioning plate 6; the glass fiber reinforced composite truss web member 4 is filled with concrete.

[0034] A glass fiber reinforced composite positioning plate 6 extends vertically from the first end face 41 and is glued to the side of the glass fiber reinforced composite girder 4. The glass fiber reinforced composite positioning plate 6 is glued to the first end face 41.

[0035] The bolt holes of the glass fiber reinforced composite positioning plate 6 are glued and fixed to the contact area of ​​the fine-rolled threaded steel bar 5 to prevent the position of the fine-rolled threaded steel bar 5 from moving during construction.

[0036] The first connecting leg 112 and the second connecting leg 113 are glued and fixed with the glass fiber reinforced composite web member 4. High-strength bolts are installed in the bolt holes of the first connecting leg 112 and the second connecting leg 113. The side body of the glass fiber reinforced composite web member 4 is integrally formed by bending the connecting plate. The first end surface 41 is sealingly connected with the side body.

[0037] The glass fiber reinforced composite web member 4 and the GFRP positioning plate 6 are glued, and the GFRP web member 4 is connected with the GFRP opening plate shear connector 1 by high-strength bolts 3. The GFRP web member 4 is filled with concrete, and the center position of the GFRP web member 4 is penetrated by a fine rolled threaded steel bar 5 with a nut 7 to enhance the compression resistance of the GFRP web member 4. The nut 7 is used to enhance the connection performance of the fine rolled threaded steel bar 5 and the concrete. The GFRP positioning plate 6 makes the fine rolled threaded steel bar 5 in the center position of the GFRP web member 4.

[0038] The glass fiber reinforced composite GFRP positioning plate 6 is L-shaped to reduce the contact area with the concrete, thereby reducing the influence of the glass fiber reinforced composite GFRP positioning plate 6 on the concrete pouring. Specifically, the end of the glass fiber reinforced composite GFRP positioning plate 6 extends two legs, which are glued with the glass fiber reinforced composite GFRP web member 4, and the fine rolled threaded steel bar 5 penetrates the reserved hole, so that the fine rolled threaded steel bar 5 is fixed in the center of the glass fiber reinforced composite GFRP web member 4.

[0039] The glass fiber reinforced composite opening plate shear connector 1 and the glass fiber reinforced composite bar 2 are both prefabricated in the factory, and the surface of the glass fiber reinforced composite opening plate shear connector 1 is roughened to enhance the bonding force and friction between the opening plate connector and the concrete, and to reduce the relative slip between the connecting plate and the concrete.

[0040] The installation process of the glass fiber reinforced composite GFRP node structure device of the highway-railway dual-use truss girder bridge is as follows:

[0041] (1) First, the glass fiber reinforced composite GFRP opening plate shear connector 1 of the highway-railway dual-use truss girder bridge is connected with the glass fiber reinforced composite GFRP web member 4, specifically: epoxy resin glue is applied to the outer side of the first connecting leg 112 and the second connecting leg 113 of the two glass fiber reinforced composite GFRP opening plate shear connectors 1 and the outer side of the end surface of the two glass fiber reinforced composite GFRP web members 4 to enhance the connection performance of the glass fiber reinforced composite GFRP opening plate shear connector 1 and the glass fiber reinforced composite GFRP web member 4.

[0042] (2) The first connecting leg 112 and the second connecting leg 113 of a glass fiber reinforced plastic GFRP perforated plate shear connector 1 are connected to one side end of two glass fiber reinforced plastic GFRP web members 4 by high-strength bolts 3, and another glass fiber reinforced plastic GFRP perforated plate shear connector 1 is connected to the two glass fiber reinforced plastic GFRP web members 4 in the same way.

[0043] (3) The glass fiber reinforced plastic GFRP positioning plate 6 is placed at the end of the two GFRP web members 4, and the reserved steel bar hole of the glass fiber reinforced plastic GFRP positioning plate 6 is located at the center of the end face of the glass fiber reinforced plastic GFRP web member 4, and then the two are connected by epoxy resin glue.

[0044] (4) Two finished deformed steel bars 5 are inserted through the center hole of the glass fiber reinforced plastic GFRP positioning plate 6, and the glass fiber reinforced plastic GFRP positioning plate 6 is connected to the finished deformed steel bar 5 by gluing, and the gluing position is the contact part of the reserved steel bar hole of the glass fiber reinforced plastic GFRP positioning plate 6 and the finished deformed steel bar 5. After the gluing is completed, the finished deformed steel bar 5 is screwed with a threaded nut 7. Finally, the glass fiber reinforced plastic bar 2 is placed in the reserved hole of the glass fiber reinforced plastic GFRP perforated plate connector 1, and it is ensured that the glass fiber reinforced plastic GFRP web member 4 is filled with concrete during the pouring process.

Claims

1. A glass fiber reinforced composite material node construction device of a rail-cum-road truss girder bridge, characterized by: The application relates to a glass fiber reinforced composite material perforated plate shear connector (1), a glass fiber reinforced composite material web (4) and a threaded steel bar (5); the glass fiber reinforced composite material perforated plate shear connector (1) is composed of two parallel Y-shaped connecting plates (11); The connecting plate (11) comprises an end portion (111), a first connecting leg (112) and a second connecting leg (113), the first connecting leg (112), the second connecting leg (113) and the glass fiber reinforced composite material web (4) are provided with bolt holes; two first connecting legs (112) are fixed to the glass fiber reinforced composite material web (4) through the bolt holes; two second connecting legs (113) are fixed to the glass fiber reinforced composite material web (4) through the bolt holes; two end portions (111) are provided with steel bar holes, and glass fiber reinforced composite material steels (2) are fixedly arranged in the steel bar holes; The glass fiber reinforced composite material web (4) is a long rectangular parallelepiped with one end being open; the glass fiber reinforced composite material web (4) comprises a first end face (41) and a side face body, the first end face (41) is provided with a glass fiber reinforced composite material positioning plate (6), a bolt hole penetrating the threaded steel bar (5) is formed in the center of the first end face (41) and the glass fiber reinforced composite material positioning plate (6); and the glass fiber reinforced composite material web (4) is filled with concrete.

2. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: The glass fiber reinforced composite material positioning plate (6) vertically extends from the first end face (41) and is fixed to the side face of the glass fiber reinforced composite material web (4).

3. The glass fiber reinforced composite material joint structure device for a dual-purpose road-rail truss bridge according to claim 1, characterized in that: The glass fiber reinforced composite material positioning plate (6) vertically extends from the first end face (41) and is fixed to the side face of the glass fiber reinforced composite material web (4).

4. The glass fiber reinforced polymer joint construction device of the hybrid girder bridge as claimed in claim 1, wherein: The glass fiber reinforced composite material positioning plate (6) is fixedly connected to the first end face (41) through cementation.

5. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: The first connecting leg (112) and the second connecting leg (113) are fixedly connected to the glass fiber reinforced composite material web (4) through cementation.

6. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: High-strength bolts are arranged in the bolt holes of the first connecting leg (112) and the second connecting leg (113).

7. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: A nut (7) is sleeved on the threaded steel bar (5).

8. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: The side face body of the glass fiber reinforced composite material web (4) is integrally formed by bending the connecting plate.

9. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: The first end face (41) is sealingly connected to the side face body.

10. The glass fiber reinforced polymer nodal configuration of hybrid girder bridge as claimed in claim 1, wherein: ​

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