A steel structure box girder

Abstract

This application relates to a steel structure box girder, belonging to the field of bridge construction. It includes a box girder and a top panel located above the top of the box girder. The lower surface of the top panel is provided with multiple U-shaped stiffening ribs. Receiving grooves are provided on the top of the box girder opposite to the U-shaped stiffening ribs, with each groove corresponding to a specific U-shaped stiffening rib. The U-shaped stiffening ribs extend into their respective receiving grooves. Multiple bridge dampers are also provided between the box girder and the U-shaped stiffening ribs. A distance is maintained between the top panel and the top surface of the box girder, supported by the bridge dampers. Multiple damping support rods are arranged along the length of the top panel on the left and right sides of the box girder. One end of each damping support rod is hinged to the box girder, and the other end is hinged to the top panel. This application has the effect of improving the service life of the steel structure box girder.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and in particular to a steel box girder structure. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans and are called steel box girders because their shape resembles a box. Steel box girders are constructed by connecting top plates, bottom plates, webs, transverse diaphragms, longitudinal diaphragms, and stiffening ribs using a fully welded method.

[0003] When the top plate is subjected to a large impact, the aforementioned welded parts will be subjected to greater stress, affecting the lifespan of the welded parts and thus the lifespan of the steel box girder. Summary of the Invention

[0004] In order to improve the service life of steel structure box girders, this application provides a steel structure box girder.

[0005] The steel structure box girder provided in this application adopts the following technical solution:

[0006] A steel structure box girder includes a box body and a top panel located above the top of the box body. The lower surface of the top panel is provided with multiple U-shaped stiffening ribs. Receiving grooves are provided on the top of the box body at positions opposite to the U-shaped stiffening ribs, with each receiving groove corresponding to one of the U-shaped stiffening ribs. The U-shaped stiffening ribs extend into their respective receiving grooves. Multiple bridge dampers are also provided between the box body and the U-shaped stiffening ribs. A distance is maintained between the top panel and the top surface of the box body, supported by the bridge dampers. Multiple damping support rods are arranged along the length of the top panel on the left and right sides of the box body. One end of each damping support rod is hinged to the box body, and the other end is hinged to the top panel.

[0007] By adopting the above technical solution, a bridge shock absorber is installed between the top panel and the box body. When the top panel is subjected to a large impact, the bridge shock absorber can buffer the force borne by the top panel and reduce the force transmitted to the box body, thereby achieving the purpose of protecting the box body.

[0008] Optionally, a wing partition is provided between the top panel and the left and right side walls of the housing. The wing partition is fixedly connected to the top panel and slidably connected to the housing.

[0009] By adopting the above technical solution, the deformation resistance of the top panel is increased through the wing partition.

[0010] Optionally, slide rails are provided on the side wall of the housing at positions opposite to the wing partitions. A vertically arranged groove is formed on the side surface of the slide rail facing away from the housing. The wing partitions extend into the grooves and are slidably connected in the grooves.

[0011] By adopting the above technical solution, the wing partition extends into the sliding groove, thereby restricting the top panel and making it difficult for the top panel to move along its own length direction. This protects the damping support rod and prevents the damping support rod from bending and deforming due to the displacement of the top panel.

[0012] Optionally, an elastic pad is filled between the top panel and the top surface of the housing.

[0013] By adopting the above technical solution, the elastic pad fills the gap between the top panel and the top of the box, preventing foreign objects from getting stuck in the gap between the top panel and the top of the box.

[0014] Optionally, the U-shaped stiffening rib includes a horizontal portion parallel to the top panel, a left inclined portion on the left side of the horizontal portion, and a right inclined portion on the right side of the horizontal portion. The box body includes a left bearing plate and a right bearing plate, the left bearing plate being parallel to the left inclined portion and the right bearing plate being parallel to the right inclined portion. The bridge shock absorber is located between the left bearing plate and the left inclined portion, and between the right bearing plate and the right inclined portion. The bridge shock absorber is inclined.

[0015] By adopting the above technical solution, the bridge shock absorber is set at an angle. When the top panel is subjected to a downward impact force, the force it bears can be decomposed, thereby reducing the force applied to the bridge shock absorber and enabling the bridge shock absorber to better support the top panel.

[0016] Optionally, the left and right bearing plates are provided with support plates on the side opposite to the U-shaped stiffening rib.

[0017] By adopting the above technical solution, the load-bearing capacity of the left and right load-bearing plates is increased, making the left and right load-bearing plates less prone to damage and deformation.

[0018] Optionally, both the left and right bearing plates have recessed cavities on the surface facing the U-shaped stiffening rib, and the bridge shock absorber is inserted into the recessed cavity.

[0019] By adopting the above technical solution, when installing the bridge shock absorber onto the left and right bearing plates, the installation of the bridge shock absorber can be completed simply by placing the bridge shock absorber into the cavity.

[0020] Optionally, internal supports are provided at intervals along the length of the U-shaped stiffening rib between the left and right inclined portions.

[0021] By adopting the above technical solution, the deformation resistance of the U-shaped stiffening rib is increased, making it less prone to deformation under stress.

[0022] Optionally, the damping support rod includes a sleeve with one end closed and the other end open, and a connecting shaft. One end of the connecting shaft extends from the open end of the sleeve into the inner hole of the sleeve. The connecting shaft and the sleeve are slidably connected. The inner hole of the sleeve includes a sliding part and a communicating part. The sliding part and the communicating part are arranged from the closed end of the sleeve towards the open end. The diameter of the communicating part is smaller than the diameter of the sliding part. A push plate is provided at the end of the connecting shaft that extends into the inner hole of the sleeve. The diameter of the push plate is larger than the diameter of the communicating part but smaller than the diameter of the sliding part. An elastic body is provided between the push plate and the end wall of the closed end of the sleeve.

[0023] By adopting the above technical solution, when the top panel is subjected to a downward impact force, the moving axis moves in the direction of the closed end of the sleeve and squeezes the elastomer, further increasing the impact resistance of the top panel.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. A bridge shock absorber is installed between the top panel and the box body. When the top panel is subjected to a large impact, the bridge shock absorber can buffer the force on the top panel and reduce the force transmitted to the box body, thereby achieving the purpose of protecting the box body.

[0026] 2. The wing partition extends into the groove, thereby restricting the top panel and preventing it from shifting along its length. This protects the damping support rod and prevents it from bending and deforming due to displacement of the top panel. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the steel box girder of this application;

[0028] Figure 2 yes Figure 1 A cross-sectional view along point AA;

[0029] Figure 3 This is a structural schematic diagram of the box body of this application;

[0030] Figure 4 This is a structural schematic diagram of the top panel of this application;

[0031] Figure 5 This is a structural schematic diagram of the U-shaped stiffening rib of this application;

[0032] Figure 6 This is a schematic diagram of the front end face structure of the steel structure box girder of this application;

[0033] Figure 7 This is a cross-sectional view of the connection structure between the U-shaped stiffening rib and the box body in this application;

[0034] Figure 8 This is a schematic diagram of the connection structure between the left extension and the housing in this application;

[0035] Figure 9 This is a schematic diagram of the connection structure between the right extension and the housing in this application;

[0036] Figure 10 This is a cross-sectional view of the damping support rod of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Bottom plate; 12. Left side plate; 121. Left side slide rail; 1211. Left side slide groove; 13. Right side plate; 131. Right side slide rail; 1311. Right side slide groove; 14. Transverse partition; 141. Receiving groove; 15. Longitudinal partition; 16. Bearing plate assembly; 161. Left side bearing plate; 1611. First cavity; 162. Right side bearing plate; 1621. Second cavity; 17. First support plate; 18. Second support plate 1. Support plate; 2. Top panel; 21. Main body; 22. Left extension; 23. Right extension; 24. U-shaped stiffening rib; 241. Horizontal part; 242. Left inclined part; 243. Right inclined part; 244. Internal support; 25. Elastic pad; 3. Bridge shock absorber; 4. Damping support rod; 41. Sleeve; 411. Sliding part; 412. Connecting part; 42. Connecting shaft; 43. Push plate; 44. Compression spring; 5. Left wing partition; 6. Right wing partition. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0039] This application discloses a steel structure box girder.

[0040] Reference Figure 1 , Figure 2 The steel box girder includes a box body 1 and a top panel 2 located at the top of the box body 1. Multiple bridge dampers 3 are installed between the top panel 2 and the box body 1. One end of each damper 3 is connected to the top panel 2, and the other end is connected to the box body 1. The dampers 3 provide support, creating a distance between the top panel 2 and the box body 1. Damping support rods 4 are installed between the left and right sides of the box body 1 and the top panel 2. One end of each damping support rod 4 is hinged to the top panel 2, and the other end is hinged to the box body 1.

[0041] Reference Figure 3 The housing 1 includes a flat base plate 11, a left web plate 12 located to the left of the base plate 11, and a right web plate 13 located to the right of the base plate 11. The left web plate 12 is perpendicular to the surface of the base plate 11 and is welded to the base plate 11. The right web plate 13 is perpendicular to the surface of the base plate 11 and is welded to the base plate 11. The left web plate 12 and the right web plate 13 are parallel to each other, and the top surfaces of the left web plate 12 and the right web plate 13 are on the same horizontal plane.

[0042] A transverse partition 14 is provided between the left web 12 and the right web 13, arranged at intervals along the length of the base plate 11. The bottom end of the transverse partition 14 is welded to the base plate 11. The side of the transverse partition 14 facing the left web 12 is welded to the left web 12, and the side of the transverse partition 14 facing the right web 13 is welded to the right web 13. A longitudinal partition 15 is provided between two adjacent transverse partitions 14, and the longitudinal partition 15 is parallel to the left web 12 and the right web 13. The bottom end of the longitudinal partition 15 is welded to the base plate 11, and the side of the longitudinal partition 15 facing the transverse partition 14 is welded to the transverse partition 14. The top surfaces of the transverse partitions 14 are flush with the top surfaces of the left web 12, the longitudinal partition 15, and the right web 13.

[0043] Reference Figure 2 , Figure 4 The top panel 2 includes a main body 21 that is vertically opposite to the box body 1, a left extension 22 located to the left of the main body 21 and outside the left side of the box body 1, and a right extension 23 located to the right of the main body 21 and outside the right side of the box body 1. The main body 21, the left extension 22, and the right extension 23 are integrally formed.

[0044] Multiple U-shaped stiffening ribs 24 are provided on the bottom surface of the main body 21, arranged from left to right. The U-shaped stiffening ribs 24 are welded to the main body 21. The U-shaped stiffening ribs 24 are parallel to each other.

[0045] Reference Figure 4 , Figure 5The U-shaped stiffening rib 24 includes a horizontal portion 241 parallel to the main body portion 21. A left inclined portion 242, which connects the horizontal portion 241 to the main body portion 21 and is inclined at an angle, is provided on the left side of the horizontal portion 241. The left inclined portion 242 is integrally formed with the horizontal portion 241 and is welded to the main body portion 21 of the top panel 2. A right inclined portion 243, which connects the horizontal portion 241 to the main body portion 21 and is inclined at an angle, is provided on the right side of the horizontal portion 241. The right inclined portion 243 is integrally formed with the horizontal portion 241 and is welded to the main body portion 21 of the top panel 2. The distance between the left inclined portion 242 and the right inclined portion 243 gradually increases from the end connected to the horizontal portion 241 towards the end connected to the main body portion 21.

[0046] Between the left inclined portion 242 and the right inclined portion 243, a plurality of inner supports 244 are provided at intervals along the length of the U-shaped stiffening rib 24. The bottom end of the inner support 244 is welded and fixed to the horizontal portion 241. The side of the inner support 244 facing the left inclined portion 242 abuts against the left inclined portion 242 and is welded and fixed. The side of the inner support 244 facing the right inclined portion 243 abuts against the right inclined portion 243 and is welded and fixed.

[0047] Reference Figure 6 , Figure 7 At the top of the transverse partition 14, opposite to each U-shaped stiffening rib 24, there is a receiving groove 141 that matches the shape of the U-shaped stiffening rib 24. When the top panel 2 is at the top of the box body 1, the U-shaped stiffening rib 24 extends into the receiving groove 141. Due to the supporting effect of the bridge shock absorber 3 on the top panel 2, a gap is left between the U-shaped stiffening rib 24 and the receiving groove 141 as the U-shaped stiffening rib 24 extends into the receiving groove 141.

[0048] An elastic pad 25 is filled between the transverse partition 14 and the main body 21 of the top panel 2, and between the receiving groove 141 and the U-shaped stiffening rib 24. The elastic pad 25 is fixed to the outer surface of the U-shaped stiffening rib 24. When the top panel 2 is installed onto the top surface of the housing 1, the elastic pad 25 fills the gap between the top panel 2 and the housing.

[0049] Reference Figure 3 , Figure 7Between two adjacent transverse partitions 14, there are bearing plate groups 16, the same number as the U-shaped stiffening ribs 24, fixedly arranged one-to-one with each U-shaped stiffening rib 24. Each bearing plate group 16 includes a left bearing plate 161 and a right bearing plate 162. The left bearing plate 161 is located to the left of the U-shaped stiffening rib 24 and is parallel to the left inclined portion 242 of the U-shaped stiffening rib 24. The right bearing plate 162 is located to the right of the U-shaped stiffening rib 24 and is parallel to the right inclined portion 243 of the U-shaped stiffening rib 24. At both ends of the left bearing plate 161, one end is welded to one of the transverse partitions 14 and the other end is welded to the other transverse partition 14. At both ends of the right bearing plate 162, one end is welded to one of the transverse partitions 14 and the other end is welded to the other transverse partition 14.

[0050] The bridge shock absorber 3 is installed between the left bearing plate 161 and the left inclined part 242 of the U-shaped stiffening rib 24, and between the right bearing plate 162 and the right inclined part 243 of the U-shaped stiffening rib 24.

[0051] A first cavity 1611 is provided on the surface of the left bearing plate 161 facing the U-shaped stiffening rib 24, and the bridge damper 3 located between the left bearing plate 161 and the U-shaped stiffening rib 24 is inserted into the first cavity 1611. A second cavity 1621 is provided on the surface of the right bearing plate 162 facing the U-shaped stiffening rib 24, and the bridge damper 3 located between the right bearing plate 162 and the U-shaped stiffening rib 24 is inserted into the second cavity 1621.

[0052] A first support plate 17 is provided on the side of the left bearing plate 161 facing away from the U-shaped stiffening rib 24. One end of the first support plate 17 is welded and fixed to the left bearing plate 161, and the other end of the first support plate 17 is welded and fixed to the bottom plate 11.

[0053] A second support plate 18 is provided on the side of the right bearing plate 162 facing away from the U-shaped stiffening rib 24. One end of the second support plate 18 is welded and fixed to the right bearing plate 162, and the other end of the second support plate 18 is welded and fixed to the bottom plate 11.

[0054] Reference Figure 8Multiple left-side wing partitions 5 are provided between the left-side extension 22 and the left-side web plate 12 of the housing 1. The left-side wing partitions 5 are spaced apart along the seam length direction of the joint between the left-side extension 22 and the left-side web plate 12. The left-side wing partitions 5 are welded and fixed to the left-side extension 22, and the left-side wing partitions 5 are slidably connected to the left-side web plate 12 of the housing 1. A left-side slide rail 121 is welded and fixed to the outer surface of the left-side web plate 12 at a position opposite to the left-side wing partitions 5. A vertically arranged left-side slide groove 1211 is opened on the side surface of the left-side slide rail 121 away from the left-side web plate 12. The end of the left-side wing partition 5 facing the left-side web plate 12 extends into the left-side slide groove 1211 and can slide vertically in the left-side slide groove 1211.

[0055] Damping support rods 4 are spaced apart along the seam length of the joint between the left extension 22 and the left web 12. The damping support rods 4 are staggered with the left wing partition 5. One end of each damping support rod 4 is hinged to the left extension 22, and the other end is hinged to the left web 12.

[0056] Reference Figure 9 Multiple right-side wing partitions 6 are provided between the right-side extension 23 and the right-side web plate 13 of the housing 1. The right-side wing partitions 6 are spaced apart along the seam length direction of the butt joint between the right-side extension 23 and the right-side web plate 13. The right-side wing partitions 6 are welded and fixed to the right-side extension 23, and the right-side wing partitions 6 are slidably connected to the right-side web plate 13 of the housing 1. A right-side slide rail 131 is welded and fixed to the outer surface of the right-side web plate 13 at a position opposite to the right-side wing partitions 6. A vertically arranged right-side slide groove 1311 is opened on the side surface of the right-side slide rail 131 facing away from the right-side web plate 13. The end of the right-side wing partition 6 facing the right-side web plate 13 extends into the right-side slide groove 1311 and can slide vertically in the left-side slide groove 1211.

[0057] Damping support rods 4 are spaced apart along the seam length of the butt joint between the right extension 23 and the right web 13. The damping support rods 4 are staggered with the right wing partition 6. One end of each damping support rod 4 is hinged to the right extension 23, and the other end is hinged to the right web 13.

[0058] Reference Figure 10 The damping support rod 4 includes a sleeve 41 with one open end and one closed end, and a connecting shaft 42 with one end extending from the open end of the sleeve 41 into the inner hole of the sleeve 41. The inner hole of the sleeve 41 is a stepped hole, and the inner hole of the sleeve 41 includes a sliding part 411 and a connecting part 412, which are arranged from the closed end of the sleeve 41 towards the open end. The diameter of the connecting part 412 is smaller than the diameter of the sliding part 411.

[0059] The end of the connecting shaft 42 passes through the connecting portion 412 and extends into the sliding portion 411. A push plate 43 is provided at the end of the connecting shaft 42 that extends into the connecting portion 412, and the push plate 43 is located inside the sliding portion 411. The push plate 43 is welded to the connecting shaft 42 or integrally formed. The diameter of the push plate 43 is larger than the diameter of the hole in the connecting portion 412 but smaller than the diameter of the hole in the sliding portion 411. In the inner hole of the sleeve 41, a compression spring 44 is provided between the push plate 43 and the closed end of the sleeve 41. One end of the compression spring 44 abuts against the push plate 43, and the other end of the compression spring 44 abuts against the end wall of the closed end of the sleeve 41.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel structure box girder, characterized in that: The enclosure includes a housing (1) and a top panel (2) located above the top of the housing (1). The lower surface of the top panel (2) is provided with multiple U-shaped stiffening ribs (24). The housing (1) includes a flat bottom plate (11) and transverse partitions (14) arranged at intervals along the length of the bottom plate (11). At the top of each transverse partition (14), a receiving groove (141) adapted to the shape of the U-shaped stiffening rib (24) is provided at a position opposite to each U-shaped stiffening rib (24). The U-shaped stiffening rib (24) extends into the corresponding receiving groove (141). The U-shaped stiffening rib (24) includes a horizontal part (241) parallel to the top panel (2). The left side of the horizontal part (241) is provided with an inclined section. A left inclined portion (242) is obliquely arranged, and a right inclined portion (243) is provided on the right side of the horizontal portion (241). A bearing plate group (16) with the same number as the U-shaped stiffening ribs (24) is fixed between two adjacent transverse partitions (14). Each bearing plate group (16) includes a left bearing plate (161) and a right bearing plate (162). The left bearing plate (161) is parallel to the left inclined portion (242), and the right bearing plate (162) is parallel to the right inclined portion (243). The bridge shock absorber (3) is located between the left bearing plate (161) and the left inclined portion (242) and between the right bearing plate (162) and the right inclined portion (243). The top panel (2) is supported by the bridge shock absorber (3) and has a distance between it and the top surface of the box (1). Multiple damping support rods (4) are arranged on the left and right sides of the box (1) and the top panel (2) along the length of the top panel (2). One end of the damping support rod (4) is hinged to the box (1) and the other end of the damping support rod (4) is hinged to the top panel (2).

2. A steel structure box girder according to claim 1, characterized in that: A wing partition is also provided between the top panel (2) and the left and right side walls of the box (1). The wing partition is fixedly connected to the top panel (2) and slidably connected to the box (1).

3. A steel structure box girder according to claim 2, characterized in that: The side wall of the box (1) is provided with slide rails at positions opposite to the wing partition. The slide rails are provided with vertically arranged grooves on the side surface facing away from the box (1). The wing partition extends into the groove and is slidably connected in the groove.

4. A steel structure box girder according to claim 1, characterized in that: An elastic pad (25) is filled between the top panel (2) and the top surface of the box (1).

5. A steel structure box girder according to claim 1, characterized in that: The bridge shock absorber (3) is set at an angle.

6. A steel structure box girder according to claim 1, characterized in that: The left bearing plate (161) and the right bearing plate (162) are provided with support plates on the side opposite to the U-shaped stiffening rib (24).

7. A steel structure box girder according to claim 1, characterized in that: The left bearing plate (161) and the right bearing plate (162) are both provided with concave cavities on the side surface facing the U-shaped stiffening rib (24), and the bridge shock absorber (3) is inserted into the concave cavity.

8. A steel structure box girder according to claim 1, characterized in that: An inner brace (244) is provided at intervals along the length of the U-shaped stiffening rib (24) between the left inclined portion (242) and the right inclined portion (243).

9. A steel structure box girder according to claim 1, characterized in that: The damping support rod (4) includes a sleeve (41) with one end closed and the other end open, and a connecting shaft (42). One end of the connecting shaft (42) extends from the open end of the sleeve (41) into the inner hole of the sleeve (41). The connecting shaft (42) is slidably connected to the sleeve (41). The inner hole of the sleeve (41) includes a sliding part (411) and a connecting part (412). 12) Arranged from the closed end of the sleeve (41) towards the open end, the diameter of the connecting part (412) is smaller than the diameter of the sliding part (411), and a push plate (43) is provided at one end of the connecting shaft (42) that extends into the inner hole of the sleeve (41). The diameter of the push plate (43) is larger than the diameter of the connecting hole and smaller than the diameter of the sliding part (411). An elastic body is provided between the push plate (43) and the end wall of the closed end of the sleeve (41).

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