Steel truss bridge joint structure connected by rivets and construction method

Abstract

The application relates to a steel truss bridge node structure connected by rivets and a construction method, and belongs to the technical field of steel truss bridge structures. The steel truss bridge node structure connected by rivets comprises a connecting top plate connected with a top beam of a bridge body, a riveting assembly vertically arranged on the connecting top plate, and a longitudinal beam connecting head with one end connected with the riveting assembly; the riveting assembly comprises two riveting plates vertically welded on the lower surface of the connecting top plate and a limiting connecting plate vertically arranged between the two riveting plates; the longitudinal beam connecting head is rivet-connected with the riveting plate, the middle part of the inclined web of the bridge body is rivet-connected with the riveting plate, and the end part is abutted against the lower surface of the limiting connecting plate; and the longitudinal beam connecting head is rivet-connected with the top of the vertical web of the middle part of the bridge body. The application has the advantages of short construction period, low construction environment requirement and small deformation of structural parts.

Description

Technical Field

[0001] This application relates to the technical field of steel truss bridge construction, and in particular to a steel truss bridge node construction and construction method using riveted connections. Background Technology

[0002] A steel truss bridge is a bridge structural system that falls between beams and arches, generally consisting of a bending-resistant superstructure of beams connected to a load-bearing substructure of columns. Because the joints between the beams and columns are rigid connections, the beams benefit from the bending stiffness of the columns, providing load relief, while the entire bridge structure is a compression-bending structure, thus also possessing compressive resistance. Therefore, the joint construction of a steel truss bridge is arguably the primary factor influencing its overall mechanical performance and load-bearing capacity.

[0003] Currently, steel truss bridges generally use welding to fix and install joint structures. Welded structures have high load-bearing capacity and can adapt to applications requiring large spans and high load-bearing capacity. However, welding construction has high requirements for the construction site and environment, high requirements for the weldability of the plates, and consumes a relatively long construction time. Welding electrical work and open flame work also pose certain safety hazards. For some small-span, low-load-bearing steel truss bridges, the plate thickness at the connection points is relatively thin. If the entire structure is welded, it is easy to cause problems such as large welding deformation, welding stress concentration, and construction delays.

[0004] In view of the above-mentioned technical background, the inventors believe that the existing steel truss bridge node structure with welding as the main connection method is prone to node structural defects and construction safety hazards when applied to small-span, low-load-bearing steel truss bridges, and has the disadvantages of low construction efficiency and delayed construction period. Summary of the Invention

[0005] In order to improve the construction efficiency of small-span, low-load-bearing steel truss bridges, reduce safety hazards during construction, and eliminate problems such as excessive welding deformation and local stress concentration caused by through-body welding, this application provides a steel truss bridge node structure and construction method using riveted connections.

[0006] Firstly, this application provides a technical solution for a steel truss bridge node structure using riveted connections: A steel truss bridge node structure using riveted connections includes a connecting top plate connected to the top crossbeam of the bridge body, a riveting assembly vertically disposed on the connecting top plate, and a longitudinal beam connector with one end connected to the riveting assembly. The riveting assembly includes two riveting plates vertically welded to the lower surface of the connecting top plate and a limiting connecting plate vertically disposed between the two riveting plates. The longitudinal beam connector is riveted to the riveting plates, the inclined web members in the middle of the bridge body are riveted to the riveting plates, and the ends abut against the lower surface of the limiting connecting plate. The longitudinal beam connector is riveted to the top of the vertical web members in the middle of the bridge body.

[0007] By adopting the above technical solution, the connecting top plate serves to fix the present application to the top crossbeam of the bridge body. The riveting assembly vertically connected to the connecting top plate serves to fix the top of the inclined web members in the middle of the bridge body, and also provides an installation position for the longitudinal beam connector and plays a limiting role. The longitudinal beam connector fixes the top of the vertical web members in the middle of the bridge body. The riveting plate in the riveting assembly reduces the safety hazards in the assembly construction process and shortens the construction period required for assembly by riveting the inclined web members in the middle of the bridge body. It also eliminates the problems of excessive welding deformation and local stress concentration caused by through-body welding. The structural design of the longitudinal beam connector sleeved on the vertical web members in the middle of the bridge body can reduce installation errors and play a positioning role for subsequent rivet installation, thus simplifying the installation process and further shortening the construction period.

[0008] Optionally, the riveting assembly further includes multiple outer stiffening plates; the outer stiffening plates are vertically and fixedly connected to the outer surface of the riveting plate and the lower surface of the connecting top plate, and the multiple outer stiffening plates are evenly arranged along the length direction of the riveting plate.

[0009] By adopting the above technical solution, the external stiffening plate structure in the riveting assembly can increase the mechanical strength of the connection structure between the riveting assembly and the connecting top plate, increase the overall bending deformation resistance and load-bearing capacity of this application, and the structural design of multiple external stiffening plates evenly arranged along the length direction of the riveting plate can uniformly improve the load-bearing capacity at each position along the length direction of the riveting plate, thus optimizing the mechanical properties.

[0010] Optionally, the outer surface of the riveting plate is provided with a flap; the flap covers the outside of the rivet holes of the riveting plate.

[0011] By adopting the above technical solution, the flip-top structure on the outer surface of the riveting plate protects the riveting plate and the rivets passing through it, reducing rain and snow erosion and slowing down the oxidation and rusting process. Combined with the anti-rust paint applied to the plate surface and the galvanized protective layer on the rivet surface, it achieves better rust prevention and improves the overall service life of this application.

[0012] Optionally, a pad is fixed between the riveting plates; the top of the pad abuts against the lower surface of the connecting top plate, and the lower surface of the pad abuts against the upper surface of the longitudinal beam connector.

[0013] By adopting the above technical solution, the pads set between the riveting plates play a role in fixing the longitudinal beam connector to the connecting top plate, and at the same time can transmit the pressure from the longitudinal beam connector to the connecting top plate, thereby improving the mechanical strength of the connection structure between the longitudinal beam connector and the riveting assembly.

[0014] Optionally, the sidewall of the pad is provided with multiple support plates vertically; the multiple support plates are arranged symmetrically about the geometric center of the pad.

[0015] By adopting the above technical solution, the multiple support plates vertically arranged on the side wall of the pad block play the role of fixing the position of the pad block and distributing the load from the longitudinal beam connector to the connecting top plate. The structural design of the multiple support plates being symmetrical about the geometric center of the pad block makes the load distribution effect on the longitudinal beam connector more uniform.

[0016] Optionally, the connecting top plate includes a plate body connected to the riveting assembly and symmetrically arranged claws on both sides of the upper surface of the plate body.

[0017] By adopting the above technical solution, the plate in the connecting top plate plays the role of connecting the riveting assembly, and the claws symmetrically arranged on both sides of the upper surface of the plate play the role of connecting the top crossbeam of the bridge body.

[0018] Optionally, the claws can be detachably connected to the plate body.

[0019] By adopting the above technical solution, the structural design of the detachable connection between the claw and the plate body can simplify the process of assembling the connecting top plate and the top crossbeam of the bridge body into a whole, thereby further shortening the construction cycle.

[0020] Optionally, the longitudinal beam connector includes a positioning plate riveted to the riveting plate and a frame disposed between the positioning plates; the frame is fitted onto the top of the vertical web member in the middle of the bridge body.

[0021] By adopting the above technical solution, the positioning plate in the longitudinal beam connector plays a supporting and limiting role for the frame, realizing the relative position fixation between the frame and the riveting assembly, while ensuring the integrity of the frame structure and improving the structural strength of the frame. The frame plays the role of being fitted onto the top of the vertical web members in the middle of the bridge body, realizing the fixed connection of the vertical web members.

[0022] Optionally, a guide plate is provided at an angle at the end of the frame away from the riveting assembly.

[0023] By adopting the above technical solution, the end of the frame away from the riveting assembly, that is, the end of the frame near the top of the vertical web member in the middle of the bridge, has a guide plate structure that is inclined to the end of the frame to guide the vertical web member in the middle of the bridge, which simplifies the process of inserting the vertical web member into the frame and achieves the effect of further shortening the construction cycle.

[0024] Secondly, this application provides a construction method for steel truss bridge nodes using riveted connections, which applies the aforementioned steel truss bridge node structure using riveted connections and adopts the following technical solution: A construction method for steel truss bridge joints using riveted connections includes the following steps: Step 1: Hoist the longitudinal beam connector to the top of the vertical web member, install rivets and fix it; Step 2: Install rivets and secure the top of the inclined web member to the riveting assembly; Step 3: Connect the top plate to the top crossbeam of the bridge body and pre-fix it by snapping it together and leave it to stand for a period of time; Step 4: Weld and fix the connecting top plate to the top crossbeam of the bridge body.

[0025] By adopting the above technical solution and applying the steel truss bridge node structure with rivet connection as the main connection and fixing structure in this application, it is possible not only to avoid the problems of high construction site requirements, extended construction period and many construction safety hazards caused by whole-body welding, but also to solve the problems of large welding deformation and local stress concentration in small-span, low-bearing-capacity steel truss bridges, and to have relatively good mechanical properties and bearing capacity within a certain range.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The connecting top plate in this application serves to fix this application to the top crossbeam of the bridge body. The riveting assembly vertically connected to the connecting top plate serves to fix the top of the inclined web members in the middle of the bridge body, and provides an installation position for the longitudinal beam connector and also serves to limit the installation. The longitudinal beam connector fixes the top of the vertical web members in the middle of the bridge body. The riveting plate in the riveting assembly reduces the safety hazards in the assembly process and shortens the construction period required for assembly by riveting the inclined web members in the middle of the bridge body. It also eliminates the problems of excessive welding deformation and local stress concentration caused by through-body welding. The structural design of the longitudinal beam connector sleeved on the vertical web members in the middle of the bridge body can reduce installation errors and play a positioning role for subsequent rivet installation, thereby simplifying the installation process and further shortening the construction period. 2. In this application, the end of the frame away from the riveting assembly, that is, the end of the frame near the top of the vertical web member in the middle of the bridge body, has a guide plate structure that is inclined to the frame and this end, which plays a guiding role for the vertical web member in the middle of the bridge body, simplifies the process of inserting the vertical web member into the frame, and achieves the effect of further shortening the construction cycle. 3. Application in this application The steel truss bridge node structure with riveted connection as the main connection and fixing structure in this application can not only avoid the problems of high construction site requirements, long construction period and many construction safety hazards caused by whole-body welding, but also solve the problems of large welding deformation and local stress concentration in small-span, low-bearing-capacity steel truss bridges. It has relatively good mechanical properties and bearing capacity within a certain range. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a steel truss bridge node structure using riveted connections, as disclosed in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the riveting assembly in an embodiment of this application.

[0029] Figure 3 This is a structural schematic diagram of the longitudinal beam connector in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Connecting top plate; 11. Plate body; 12. Claw; 2. Riveting assembly; 21. Riveting plate; 22. Limiting connecting plate; 23. Outer stiffening plate; 24. Pad block; 211. Flip cover; 241. Support plate; 3. Longitudinal beam connector; 31. Positioning plate; 32. Frame body; 321. Guide plate. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail.

[0032] A steel truss bridge is a bridge structure system between beams and arches, generally composed of a bending-resistant superstructure of beams and a bearing-load-bearing substructure of columns. The joint construction of a steel truss bridge is a major factor affecting the overall mechanical performance and load-bearing capacity of the bridge. Currently, steel truss bridges generally use welding to fix and install the joint construction. Welded structures have high load-bearing capacity and can adapt to applications requiring large spans and high load-bearing capacity. However, welding construction has high requirements for the construction site and environment, high requirements for the welding performance of the plates, and consumes a relatively long construction time. Welding with electricity and open flames also poses certain safety hazards. For some small-span, low-load-bearing steel truss bridges, the plate thickness at the connection points is relatively thin. If a full-body welding method is used, problems such as large welding deformation, welding stress concentration, and construction delays are likely to occur. To improve the construction efficiency of small-span, low-load-bearing steel truss bridges, reduce safety hazards during construction, and eliminate problems such as excessive welding deformation and local stress concentration caused by full-body welding, this application provides a steel truss bridge joint construction structure and construction method using riveted connections.

[0033] Firstly, embodiments of this application disclose a steel truss bridge node structure using riveted connections. (Refer to...) Figure 1 A steel truss bridge node structure using riveting includes a connecting top plate 1, a riveting assembly 2, and a longitudinal beam connector 3. The upper surface of the connecting top plate 1 is pre-fixed to the top crossbeam of the bridge body at both ends by snap-fitting and then welded for fixation. The riveting assembly 2 is fixedly installed on the lower surface of the connecting top plate 1 by welding. The longitudinal beam connector 3 is installed in the middle position of the riveting assembly 2 by riveting, and the riveting assembly 2 is fixedly connected to the top of the inclined web member in the middle of the bridge body by riveting. The longitudinal beam connector 3 is sleeved on the top of the vertical web member in the middle of the bridge body, away from the riveting assembly 2, and is fixedly connected by riveting.

[0034] Reference Figure 1 The connecting top plate 1 includes a plate body 11 and clamps 12. The plate body 11 can be a rectangular metal plate. The surface of the plate body 11 is coated with anti-rust paint. The clamps 12 are symmetrically installed on both sides of the upper surface of the plate body 11 by bolt connection, and the clamps 12 are engaged with the top crossbeam of the bridge body.

[0035] Reference Figure 1 and Figure 2The riveting assembly 2 includes riveting plates 21, limiting connecting plates 22, outer stiffening plates 23, and pads 24. Two riveting plates 21 are used. The two riveting plates 21 are symmetrically and perpendicularly welded to the lower surface of the connecting top plate 1 about its geometric center. A flip cover 211 is installed on the outer surface of the riveting plates 21 via a rotatable connection, covering the outside of the rivet holes. The tops of the inclined web members in the middle of the bridge are symmetrically installed on both sides about the geometric center of the riveting plates 21 via riveting. The limiting connecting plate 22 is vertically connected between the two riveting plates 21 by welding, and abuts against the top of the inclined web members in the middle of the bridge. The limiting connecting plate 22 assists in positioning the rivets of the inclined web members, reducing construction difficulty, shortening the construction period, and increasing the overall structural strength of the riveting assembly 2. Multiple outer stiffening plates 23 are vertically welded to the top of the outer surface of the riveting plates 21. The outer stiffening plate 23 is welded perpendicularly to the lower surface of the connecting top plate 1. Multiple outer stiffening plates 23 are evenly arranged along the length of the riveting plate 21. A spacer block 24 is welded between two riveting plates 21. The spacer block 24 is located in the middle of the two riveting plates 21, with its lower surface abutting against the upper surface of the longitudinal beam connector 3, and its upper surface welded to the lower surface of the connecting top plate 1. Multiple support plates 241 are symmetrically and perpendicularly welded to the two sides of the spacer block 24. The support plates 241 are welded perpendicularly to the lower surface of the connecting top plate 1.

[0036] Reference Figure 1 and Figure 3 The longitudinal beam connector 3 includes a positioning plate 31 and a frame 32. There are two positioning plates 31, and the frame 32 is located between the two positioning plates 31 and is fixedly connected to the positioning plates 31 by welding. The positioning plates 31 are fixedly connected to the riveting assembly 2 by riveting. The frame 32 is fitted onto the top of the vertical web member in the middle of the bridge body, and a guide plate 321 is obliquely welded to the end of the frame 32 away from the riveting assembly 2. The side wall of the end of the frame 32 away from the riveting assembly 2 is fixedly connected to the top of the vertical web member by riveting.

[0037] Secondly, embodiments of this application disclose a construction method for steel truss bridge nodes using riveted connections, comprising the following steps: Step 1: Hoist the longitudinal beam connector 3 to the top of the vertical web member, install rivets and fix it.

[0038] In this step, the frame 32 is first lifted and fitted onto the top of the vertical web member. Then, the vertical web member is fixed to the frame 32 using rivets. Finally, the positioning plate 31 is fixed to the riveting assembly 2 using rivets. After installation, check whether the pad 24 abuts against the upper surface of the frame 32. If not, adjust the rivet connection position.

[0039] Step 2: Install rivets on the top of the inclined web member and fix it to the riveting assembly 2.

[0040] In this step, the rivets of the inclined web members on both sides of the riveting assembly 2 are installed symmetrically and alternately in order from low to high horizontal height.

[0041] Step 3: Connect the top plate 1 to the top crossbeam of the bridge body and pre-fix it by snapping it together and leave it to stand for a period of time.

[0042] In this step, the claws 12 need to be removed from the plate 11 first, then the plate 11 is attached to the lower surface of the top crossbeam of the bridge body and fixed by spot welding, and then the claws 12 are symmetrically installed on the plate 11.

[0043] Step 4: Weld and fix the connecting top plate 1 to the top crossbeam of the bridge body.

[0044] In this step, the claw 12 needs to be fully welded to the upper surface of the top crossbeam of the bridge body. After welding, it should be left to stand for a period of time to allow the welding deformation to complete and eliminate internal stress.

[0045] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel truss bridge node structure using riveted connections, characterized in that: The bridge includes a connecting top plate (1) connected to the top crossbeam of the bridge body, a riveting assembly (2) vertically mounted on the connecting top plate (1), and a longitudinal beam connector (3) connected at one end to the riveting assembly (2). The riveting assembly (2) includes two riveting plates (21) vertically welded to the lower surface of the connecting top plate (1) and a limiting connecting plate (22) vertically mounted between the two riveting plates (21). The longitudinal beam connector (3) is riveted to the riveting plates (21), and the inclined web members in the middle of the bridge body are riveted to the riveting plates (21), with their ends abutting against the lower surface of the limiting connecting plate (22). The longitudinal beam connector (3) is riveted to the top of the vertical web members in the middle of the bridge body. A pad (24) is fixed between the riveting plates (21); the top of the pad (24) abuts against the lower surface of the connecting top plate (1), and the lower surface of the pad (24) abuts against the upper surface of the longitudinal beam connector (3). The pad (24) has a plurality of support plates (241) vertically arranged on its sidewall; the plurality of support plates (241) are arranged symmetrically about the geometric center of the pad (24); The connecting top plate (1) includes a plate body (11) connected to the riveting assembly (2) and claws (12) symmetrically arranged on both sides of the upper surface of the plate body (11). The claw (12) is detachably connected to the plate (11).

2. The steel truss bridge node structure using riveted connections according to claim 1, characterized in that: The riveting assembly (2) also includes a plurality of outer stiffening plates (23); the outer stiffening plates (23) are vertically and fixedly connected to the outer surface of the riveting plate (21) and the lower surface of the connecting top plate (1), and the plurality of outer stiffening plates (23) are evenly arranged along the length direction of the riveting plate (21).

3. The steel truss bridge node structure using riveted connections according to claim 1, characterized in that: The outer surface of the riveting plate (21) is provided with a flip cover (211); the flip cover (211) covers the outside of the rivet hole of the riveting plate (21).

4. A steel truss bridge node structure using riveted connections according to claim 1, characterized in that: The longitudinal beam connector (3) includes a positioning plate (31) riveted to the riveting plate (21) and a frame (32) disposed between the positioning plate (31); the frame (32) is fitted onto the top of the vertical web member in the middle of the bridge body.

5. A steel truss bridge node structure using riveted connections according to claim 4, characterized in that: The frame (32) has a guide plate (321) at one end away from the riveting assembly (2).

6. A construction method for a steel truss bridge node using riveted connections, employing the steel truss bridge node structure using riveted connections as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Hoist the longitudinal beam connector (3) to the top of the vertical web member, install rivets and fix it; Step 2: Install rivets and secure the top of the inclined web member to the riveting assembly; Step 3: Connect the top plate (1) to the top crossbeam of the bridge body and fix it in place for a period of time; Step 4: Weld the connecting top plate (1) to the top crossbeam of the bridge body for fixed connection.

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