Tandem joint of steel beam and concrete beam plate of railway extra-large-span rigid frame bridge
By using a series connection between steel beams and concrete beams in a railway extra-long span rigid frame bridge, problems such as concentrated shear force from weld studs and the difficulty of steel structure processing were solved, achieving safety, reliability, and ease of construction of the connection nodes, and improving the quality of concrete pouring and the rigidity of long-span bridges.
Patent Information
- Application Number
- CN202520332750.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing technologies are insufficient to meet the safety, reliability, and ease of construction requirements of the connection nodes between steel beams and concrete beams in extra-long span rigid frame railway bridges, especially given the concentrated shear force of weld studs, the difficulty in processing steel structures in narrow spaces, and the challenges in ensuring the quality of concrete pouring.
The railway adopts a series node of steel beams and concrete beams for extra-large span rigid frame bridges. Flexible connectors are mixed with welded studs and perforated steel plate connectors. Combined with wedge-shaped stiffening steel plates and closed section steel structures, the shear force concentration of welded studs is reduced, the steel structure processing is simplified, the concrete pouring quality is improved, and the force transmission smoothness is improved by the through connection of prestressed tendons.
It effectively reduces weld stud shear concentration by about 40%, simplifies steel structure processing, improves concrete pouring quality, enhances the safety, reliability and durability of connection nodes, and increases the steel content and stiffness of long-span rigid frame bridges.
Smart Images
Figure CN223951595U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to railway bridge engineering technical field, concretely is a railway super long span rigid frame bridge steel beam and concrete beam plate piece series connection type node. BACKGROUND
[0002] The railway super long span bridge engineering with the span more than 200m adopts the hybrid beam rigid frame bridge scheme of the steel box beam in the span and the concrete box beam of the rest beam section, can effectively enhance the spanning capacity of the bridge, shortens the construction period, improves the economy of engineering construction, has good application and popularization prospect.
[0003] In the design and construction process of the super long span railway rigid frame bridge, the welding nail shear force concentration produced by the lengthening of the node steel and concrete combination length, the difficulty of the narrow space processing and manufacturing of the node steel structure, the difficulty of the steel bar binding, the pouring quality of the concrete filled in the narrow closed section steel structure are not easy to guarantee. UTILITY MODEL CONTENT
[0004] The utility model discloses a railway super long span rigid frame bridge steel beam and concrete beam plate piece series connection type node, which can solve the problems that the prior art cannot meet the design and construction requirements of the connection node of the railway super long span rigid frame bridge steel beam and concrete beam.
[0005] To solve the above technical problems, the utility model adopts the following technical scheme:
[0006] A railway super long span rigid frame bridge steel beam and concrete beam plate piece series connection type node, which comprises a steel beam plate piece, a concrete beam plate piece and a concrete total constraint area, wherein one end of the concrete total constraint area is connected with the steel beam plate piece, the concrete total constraint area comprises a closed section steel shell, welding nails and a perforated steel plate connecting piece, the closed section steel shell is filled with self-compacting fiber concrete, and the closed section steel shell and the self-compacting fiber concrete are combined through the welding nails and the perforated steel plate connecting piece.
[0007] A pressure plate is arranged on one side of the closed section steel shell.
[0008] Preferably, a concrete local constraint area is arranged on one side of the concrete total constraint area, the concrete local constraint area comprises a wedge-shaped stiffened steel plate and a vibratable cast-in-place concrete, the wedge-shaped stiffened steel plate is of an open section, the slope of the wedge-shaped stiffened steel plate is 3%, and a reinforcing longitudinal reinforcement and an auxiliary stirrup are arranged on one side of the wedge-shaped stiffened steel plate respectively and perpendicular to each other, and the vibratable cast-in-place concrete is poured.
[0009] Preferably, the concrete beam plate member is provided with a concrete micro-constraint zone on one side, one end of the concrete local constraint zone is connected with the concrete micro-constraint zone, the concrete micro-constraint zone comprises stirrups and longitudinal reinforcement, and the concrete micro-constraint zone is poured with the vibratable cast-in-place concrete.
[0010] Preferably, the wedge-shaped stiffened steel plate of the concrete local constraint zone is provided with a flexible connecting piece with the vibratable cast-in-place concrete, the flexible connecting piece is vertically distributed on the surface of the steel beam plate member, the welding stud and the flexible connecting piece form a welding stud shear connector, the diameter of the welding stud shear connector is 22 mm, the length of the welding stud shear connector is 15 mm, the interval between adjacent welding stud shear connectors is 150 mm, and the welding stud shear connector can improve the bonding strength of the bearing plate with the self-compacting fiber reinforced concrete and the vibratable cast-in-place concrete.
[0011] Preferably, the steel beam plate member, the concrete total constraint zone, the concrete local constraint zone, the concrete micro-constraint zone and the concrete beam plate member are embedded with prestressed reinforcement.
[0012] Preferably, the concrete local constraint zone is provided with a reinforcing longitudinal reinforcement, the end of the reinforcing longitudinal reinforcement is welded to the closed-section steel shell, the wedge-shaped stiffened steel plate is provided with a round hole and a perforated steel bar, the round hole is filled with concrete, and the wedge-shaped stiffened steel plate is provided with an auxiliary stirrup, and the auxiliary stirrup, the perforated steel bar and the reinforcing longitudinal reinforcement form a steel reinforcement cage of the concrete local constraint zone.
[0013] Beneficial effects: the railway super-long-span rigid frame bridge steel beam and concrete beam plate member series connection type node has the advantages that: firstly, the flexible connecting piece, the welding stud and the perforated steel plate connecting piece are mixedly arranged, the welding stud concentrated shear is reduced by about 40%, and the design problem that the welding stud concentrated shear is too high to meet the safety and application standard of the railway bridge engineering connecting piece is solved; secondly, the open-section wedge-shaped stiffened steel plate and the closed-section steel structure are connected in series, the steel structure processing difficulty is reduced, the node reinforcing steel bar and the concrete pouring operation are facilitated, and the node concrete pouring quality is improved; thirdly, the steel beam plate member, the concrete total constraint zone, the concrete local constraint zone, the concrete micro-constraint zone and the concrete beam plate member are embedded with prestressed reinforcement and are connected in series, the steel content, the stiffness and the gradual transition of the concrete constraint of the long-span rigid frame bridge are improved, the force transmission smoothness of the connecting node is improved, and the safety, reliability and durability of the connecting node are enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0014] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application.
[0015] In the drawings:
[0016] Figure 1 This is a schematic diagram of the overall series-connected node of steel beams and concrete beams and plates in a railway extra-large span rigid frame bridge of this utility model.
[0017] Figure 2 This is a schematic diagram of the entire confined area of concrete in this utility model;
[0018] Figure 3 This is a schematic diagram of the concrete local confinement area of this utility model;
[0019] Figure 4 This is a schematic diagram of the mixed arrangement of flexible connection, welding studs and perforated steel plate connector of this utility model.
[0020] The following are the labeling elements in the diagram: 1. Steel beam / plate; 2. Closed-section steel shell; 3. Wedge-shaped stiffening steel plate; 4. Self-compacting fiber concrete; 5. Perforated steel plate connector; 6. Weld stud; 7. Flexible connector; 8. Reinforcing longitudinal bar; 9. Auxiliary stirrup; 10. Stirrup; 11. Longitudinal bar; 12. Concrete beam / plate; 13. Prestressed tendon; 14. Vibratory cast-in-place concrete; 15. Perforated reinforcing bar; 16. Bearing plate; 17. Joint reinforcement. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of the embodiments. The following text is only used to describe a series node of steel beam and concrete beam plate of a railway extra-large span rigid frame bridge of the present utility model, and does not strictly limit the protection scope of the specific claims of the present utility model.
[0022] Example: Figures 1-4 As shown, a series connection of steel beams and concrete beams / plates for a railway extra-long span rigid frame bridge includes:
[0023] A series connection of steel beams and concrete beam slabs 12 for a railway extra-long span rigid frame bridge includes steel beam slabs 1, concrete beam slabs 12, and a complete concrete confinement zone. One end of the complete concrete confinement zone is connected to the steel beam slabs 1. The complete concrete confinement zone includes a closed-section steel shell 2, welding studs 6, and perforated steel plate connectors 5. The closed-section steel shell 2 is filled with self-compacting fiber concrete 4. The closed-section steel shell 2 and the self-compacting fiber concrete 4 are connected by welding studs 6 and perforated steel plate connectors 5.
[0024] Pressure plate 16, which is disposed on one side of the closed section steel shell 2.
[0025] In the embodiment, the concrete full constraint area is provided with a concrete local constraint area on one side, the concrete local constraint area comprises a wedge-shaped stiffened steel plate 3 and a vibratable cast-in-place concrete 14, the wedge-shaped stiffened steel plate 3 is an open section, the slope of the wedge-shaped stiffened steel plate 3 is 3%, the wedge-shaped stiffened steel plate 3 is provided with a reinforcing longitudinal reinforcement 8 and an auxiliary stirrup 9 perpendicular to each other on one side respectively, and the vibratable cast-in-place concrete 14 is poured.
[0026] In the embodiment, the concrete beam slab part 12 is provided with a concrete micro constraint area on one side, one end of the concrete local constraint area is connected with the concrete micro constraint area, the concrete micro constraint area comprises a stirrup 10, a longitudinal reinforcement 11 and a node reinforcement 17, the node reinforcement 17 is used to strengthen the connection between the stirrup 10 and the longitudinal reinforcement 11, and the vibratable cast-in-place concrete 14 is poured.
[0027] In the embodiment, the wedge-shaped stiffened steel plate 3 of the concrete local constraint area is provided with a flexible connecting piece 7 and the vibratable cast-in-place concrete 14, the flexible connecting piece 7 is vertically distributed on the surface of the steel beam slab part 1, the stud 6 and the flexible connecting piece 7 form a stud 6 shear connector, the diameter of the stud 6 shear connector is 22mm, the length is 15mm, the spacing between adjacent stud 6 shear connectors is 150mm, and the stud 6 shear connector can improve the bonding strength of the bearing plate 16, the self-compacting fiber reinforced concrete 4 and the vibratable cast-in-place concrete 14.
[0028] In the embodiment, the steel beam slab part 1, the concrete full constraint area, the concrete local constraint area, the concrete micro constraint area and the concrete beam slab part 12 are penetrated and embedded with a prestressed tendon 13, and the prestressed tendon 13 is distributed along the longitudinal direction of the bridge.
[0029] In the embodiment, the concrete local constraint area is provided with a reinforcing longitudinal reinforcement 8, the end of the reinforcing longitudinal reinforcement 8 is welded to the closed section steel shell 2, the wedge-shaped stiffened steel plate 3 is provided with a round hole and a perforated steel bar 15, the round hole is filled with concrete, the wedge-shaped stiffened steel plate 3 is provided with an auxiliary stirrup 9 between the wedge-shaped stiffened steel plates 3, and the auxiliary stirrup 9, the perforated steel bar 15 and the reinforcing longitudinal reinforcement 8 form a steel reinforcement cage of the concrete local constraint area.
[0030] The utility model discloses when using, the mixed arrangement of flexible connecting piece 7 and weld nail 6 and open -hole steel sheet connecting piece 5, the weld nail 6 concentrated shear force reduces about 40%, solved the weld nail 6 shear force too concentrated and difficult to meet the design problem of railway bridge engineering connecting piece safety and applicable standard, and utilize the open -hole section wedge -shaped stiffened steel sheet 3 and closed section steel structure series connection mode of reducing steel structure processing and manufacturing difficulty, the node configuration steel bar and concrete pouring operation of being convenient for, improve the pouring quality of node concrete, the steel beam plate piece 1, concrete all constraint area, concrete local constraint area, concrete micro - constraint area and the embedded prestressed tendon 13 of mutual series connection between concrete beam plate piece 12, improve the steel content of large -span rigid frame bridge, stiffness and the gradual transition of concrete constraint, improve the force transmission smoothness of connecting node, strengthen the safety reliable and durability of connecting node.
[0031] The utility model discloses the following steps when making:
[0032] Node steel structure processing and installation: the closed section steel shell 2 and wedge -shaped stiffened steel plate 3 are cut down, and weld nail 6 and flexible connecting piece 7 are welded to form weld nail 6 shear connecting piece, and form node steel structure.
[0033] Node steel bar 17 and prestressed tendon 13 installation: first, node steel structure is installed on the support, and then installs the form between concrete beam plate piece 12 and node steel structure, wherein the support and form are not shown in the drawing for conventional technology, and then install perforated steel bar 15, node steel bar 17 and prestressed tendon 13 in proper order.
[0034] Node concrete pouring: in concrete micro - constraint area and concrete local constraint area, pour the vibratable cast-in-situ concrete 14, and fill self - compacting fiber concrete 4 in the closed section steel shell 2.
[0035] The embodiment of the utility model is explained in detail in the above in connection with the drawing, but the utility model is not limited to the above embodiment, for the ordinary skill in the art, after knowing the contents recorded in the utility model, under the premise of not departing from the principle of the utility model, still can make several equal transformation and substitution, and these equal transformation and substitution also should be regarded as belonging to the protection scope of the utility model.
Claims
1. A series connection between steel beams and concrete beams / plates for a railway extra-long span rigid frame bridge, characterized in that: The utility model relates to a kind of steel-concrete composite bridge, including: Steel beam plate, one side of the steel beam plate is provided with concrete beam plate; Concrete total constraint area, one end of the concrete total constraint area is connected with the steel beam plate, the concrete total constraint area includes closed section steel shell, welding nail and open hole steel plate connecting piece, the closed section steel shell is filled with self-compacting fiber concrete, the closed section steel shell is combined with the self-compacting fiber concrete by welding nail and open hole steel plate connecting piece; Pressure plate, the pressure plate is arranged at one side of the closed section steel shell.
2. The series connection type joint of a railway long-span rigid frame bridge steel beam and a concrete beam slab part according to claim 1, characterized in that: One side of the concrete total constraint area is provided with concrete local constraint area, the concrete local constraint area includes wedge-shaped stiffened steel plate and vibratable cast-in-place concrete, the wedge-shaped stiffened steel plate is open section, one side of the wedge-shaped stiffened steel plate is respectively provided with mutually perpendicular reinforcing longitudinal reinforcement and auxiliary stirrup, and vibratable cast-in-place concrete is poured.
3. The series connection type joint of a railway long-span rigid frame bridge steel beam and a concrete beam slab part according to claim 2, characterized in that: One side of the concrete beam plate is provided with concrete micro constraint area, one end of the concrete local constraint area is connected with the concrete micro constraint area, the concrete micro constraint area includes stirrup, longitudinal reinforcement and node reinforcement, the node reinforcement is used to strengthen the connection between the stirrup and the longitudinal reinforcement, and vibratable cast-in-place concrete is poured.
4. The series connection type joint of a railway long-span rigid frame bridge steel beam and a concrete beam slab part according to claim 2, characterized in that: Flexible connecting piece is arranged between the wedge-shaped stiffened steel plate of the concrete local constraint area and the vibratable cast-in-place concrete, and the flexible connecting piece is vertically distributed on the surface of the steel beam plate.
5. The series connection type joint of a railway long-span rigid frame bridge steel beam and a concrete beam slab part according to claim 3, characterized in that: Prestressed reinforcement is embedded between the steel beam plate, the concrete total constraint area, the concrete local constraint area, the concrete micro constraint area and the concrete beam plate, and the prestressed reinforcement is distributed along the longitudinal direction of the bridge.
6. The series connection type joint of a railway long-span rigid frame bridge steel beam and a concrete slab according to claim 2, characterized in that: The concrete local constraint area is provided with reinforcing longitudinal reinforcement, the reinforcing longitudinal reinforcement is welded to the closed section steel shell at the end, the wedge-shaped stiffened steel plate is provided with round hole and perforated steel bar, the round hole is filled with concrete, the auxiliary stirrup is arranged between the wedge-shaped stiffened steel plates, and the auxiliary stirrup, the perforated steel bar and the reinforcing longitudinal reinforcement form the steel reinforcement cage of the concrete local constraint area.