Reinforced concrete hinge structure of skew leg rigid frame bridge
By introducing limiting and buffering designs into the outer box structure of the inclined leg rigid frame bridge, the problem of easy cracking at the joints of the inclined leg rigid frame bridge was solved, and higher seismic performance was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA HYDROPOWER ELEVENTH ENG BUREAU (ZHENGZHOU) CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-10
AI Technical Summary
The corner joints connecting the bottom of the inclined legs of a rigid frame bridge are prone to cracking under stress, making it unable to effectively cope with bridge vibrations and resulting in greater structural brittleness.
It adopts an outer box structure with internal limiting structure and buffer support. Through the combination design of square sleeve block, limiting plate and pad block, it realizes flexible deformation buffer, absorbs vibration energy and improves the seismic resistance of the structure.
It effectively absorbs the vibration energy of the bridge, prevents the concrete structure from cracking due to constraint stress, and improves the seismic performance of the bridge.
Smart Images
Figure CN224478381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering technology, specifically to a reinforced concrete hinge structure for a sloping leg rigid frame bridge. Background Technology
[0002] An inclined-leg rigid frame bridge is a type of rigid frame bridge. It is a rigid frame structure with two inclined legs. The lower ends of the inclined legs are hinged. Compared with a straight-leg rigid frame bridge, an inclined-leg rigid frame bridge can shorten the span of the main girder and provide prestress to the mid-span, thereby reducing the peak internal force of the components and making the bridge lighter and more slender.
[0003] Among them, the bottom connecting corner node of the bridge's inclined leg is a key part of the entire structure. The stress situation is relatively complex. It bears a large bending moment and generates high compressive stress on the inner edge of the node, while a large tensile stress appears on the outer edge of the node. It places high demands on the reinforced concrete, cannot well cope with the vibration of the bridge, and is prone to cracking due to brittleness. Utility Model Content
[0004] The purpose of this utility model is to provide a reinforced concrete hinge structure for a slanted-leg rigid frame bridge in order to solve the above problems, as detailed below.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] This utility model provides a reinforced concrete hinge structure for a rigid frame bridge with inclined legs, including a foundation ground and a rigid frame bridge inclined leg body. The foundation ground has an installation groove inside, and an outer casing is provided in the installation groove. The rigid frame bridge inclined leg body is fitted into the outer casing. Protrusions are fixedly connected to both sides of the lower end of the rigid frame bridge inclined leg body. Limiting structures for restricting the position of the protrusions are provided on the inner walls of both sides of the outer casing. Buffer support members for restricting the offset of the rigid frame bridge inclined leg body are provided on the other two side walls of the outer casing.
[0007] Preferably, the protrusion is cylindrical in shape and has a square sleeve with a through hole in the center to fit the protrusion.
[0008] Preferably, the inner wall of the outer casing is provided with a sliding groove that is adapted to the sliding of the square sleeve block, and the square sleeve block is fitted with the sliding groove with a clearance. The limiting structure includes a limiting insert plate inserted into the sliding groove, and a bolt connector for fixing the limiting insert plate is provided at the port of the outer casing.
[0009] Preferably, the bolted connector includes a through hole at the end of the limiting insert plate, into which a bolt is inserted, and a bolt hole for threaded connection with the bolt is provided on the end face of the outer casing.
[0010] Preferably, both sides of the outer casing are provided with fitting grooves that penetrate the sliding groove, and the end of the limiting plate is a protruding design that matches the fitting groove, and the perforation is opened on the protruding part of the end of the limiting plate.
[0011] Preferably, the inner bottom of the outer casing is provided with a pad block, which is a cross-shaped design, wherein the two protruding parts are slidably connected in two grooves respectively, and the surface of the pad block abuts against the bottom end of the inclined leg body of the rigid frame bridge.
[0012] Preferably, both the pad and the limiting plate are composite blocks made of metal and rubber.
[0013] Preferably, the buffer support includes a sloping groove formed on both sides of the outer casing, a side pad is provided in the sloping groove, and a buffer steel plate that abuts against the side wall of the inclined leg of the rigid frame bridge is fixedly connected to the upper end of the side pad. Both sides of the outer casing are provided with bolt connectors for fixing the side pads.
[0014] Preferably, the second bolted connector includes a fixing hole on the side wall of the outer casing, and a threaded sleeve that is inserted into the fixing hole is fixedly connected to the side wall of the side pad, and the second bolt is threadedly connected to the threaded sleeve.
[0015] Preferably, a number of protruding strips are fixedly connected to the lower side wall of the outer casing.
[0016] The beneficial effects are:
[0017] By fitting two square sleeves onto the protrusions on both sides, placing the pads inside the outer casing, and then fixing the side pads and buffer steel plates, the outer casing is fitted onto the lower end of the inclined leg body of the rigid frame bridge. At this point, the square sleeves slide into the grooves on both sides, and the lower end of the inclined leg body of the rigid frame bridge abuts against the pads. Then, the limiting plates are inserted into the two grooves and fixed. This can absorb the vibration energy transmitted by the inclined leg body 2 of the rigid frame bridge, perform flexible deformation buffering, and improve the seismic resistance of the structure. Compared with rigid connection, the flexible contact design can avoid cracking of the concrete structure due to constraint stress. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a perspective view of the present invention;
[0020] Figure 2This is a three-dimensional cross-sectional view of the inclined leg body of the rigid frame bridge of this utility model;
[0021] Figure 3 This is a cross-sectional front view of the outer jacket of this utility model;
[0022] Figure 4 This is a three-dimensional disassembled view of the limiting insert plate of this utility model.
[0023] The annotations in the attached figures are explained as follows:
[0024] 1. Foundation ground; 2. Rigid frame bridge inclined leg body; 3. Installation groove; 4. Outer casing; 5. Protrusion; 6. Square sleeve block; 7. Sleeve hole; 8. Sliding groove; 9. Limiting insert plate; 10. Through hole one; 11. Bolt one; 12. Bolt hole; 13. Fitting groove; 14. Pad block; 15. Slope groove; 16. Side pad plate; 17. Buffer steel plate; 18. Fixing hole; 19. Threaded sleeve; 20. Bolt two; 21. Protrusion strip. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] See Figures 1-4 As shown, this utility model provides a reinforced concrete hinge structure for a rigid frame bridge with inclined legs, including a foundation ground 1 and a rigid frame bridge inclined leg body 2. An installation groove 3 is provided inside the foundation ground 1, and an outer casing 4 is provided in the installation groove 3. The rigid frame bridge inclined leg body 2 is fitted in the outer casing 4. Protrusions 5 are fixedly connected to both sides of the lower end of the rigid frame bridge inclined leg body 2. Limiting structures for limiting the position of the protrusions 5 are provided on the inner walls of both sides of the outer casing 4. Buffer support members for limiting the offset of the rigid frame bridge inclined leg body 2 are provided on the other two side walls of the outer casing 4.
[0027] As an optional implementation, the protrusion 5 is cylindrical in shape and has a square sleeve 6. The square sleeve 6 has a through hole 7 that fits onto the protrusion 5. By fitting the square sleeve 6 onto the protrusion 5, the connection between the inclined leg body 2 of the rigid frame bridge can be made more stable, while avoiding direct contact between the protrusion 5 and the external limiting structure, which would cause wear.
[0028] Reference Figure 4As shown, the inner wall of the outer casing 4 is provided with a sliding groove 8 that is adapted to slide the square sleeve 6, and the square sleeve 6 and the sliding groove 8 are in clearance fit. The limiting structure includes a limiting insert plate 9 inserted into the sliding groove 8. The port of the outer casing 4 is provided with a bolt connector for fixing the limiting insert plate 9. The bolt connector includes a through hole 10 opened at the end of the limiting insert plate 9, and a bolt 11 is inserted into the through hole 10. The end face of the outer casing 4 is provided with a bolt hole 12 that is threadedly connected to the bolt 11. By inserting the limiting insert plate 9 into the two sliding grooves 8 and inserting the bolt 11, the position of the limiting insert plate 9 is fixed, thus limiting the position of the square sleeve 6 in the sliding groove 8.
[0029] Specifically, both sides of the outer casing 4 are provided with fitting grooves 13 that penetrate the sliding groove 8, and the end of the limiting plate 9 is designed to fit the fitting groove 13 with an outward protrusion. The through hole 10 is opened on the outward protrusion of the end of the limiting plate 9. The fitting groove 13 can make the surface of the limiting plate 9 flush with the outer casing 4 after installation to avoid outward protrusion and make it more aesthetically pleasing.
[0030] Reference Figure 2 As shown, a pad 14 is provided at the bottom of the outer casing 4. The pad 14 has a cross-shaped design, with the two protruding parts on both sides slidingly connected to two grooves 8 respectively. The surface of the pad 14 abuts against the bottom end of the inclined leg body 2 of the rigid frame bridge. The cross-shaped design of the pad 14 makes it more stable when it is inside the outer casing 4. The pad 14 abuts against the inclined leg body 2 of the rigid frame bridge, which can effectively support the bottom end of the inclined leg body 2 of the rigid frame bridge and provide flexible deformation buffer for the vibration generated by the inclined leg body 2 of the rigid frame bridge.
[0031] Specifically, both the pad block 14 and the limiting plate 9 are composite blocks made of metal and rubber. The pad block 14 has a steel plate inside and a rubber outer layer, which combines rigidity and flexibility. It can flexibly deform and buffer the vibration generated by the inclined leg body 2 of the rigid frame bridge. Under the design load, the compression deformation is ≤5%, which can effectively absorb the longitudinal displacement of the beam (±50mm) and reduce the impact vibration transmitted to the substructure. Under the dead load, it provides uniform support reaction force to ensure that the stress distribution of the inclined leg body 2 of the rigid frame bridge meets the design requirements. When the inclined leg body 2 of the rigid frame bridge transmits vibration, the pad block 14 and the limiting plate 9 reduce the instantaneous impact force through viscoelastic energy dissipation.
[0032] Reference Figure 2-3 As shown, the buffer support includes a slope groove 15 opened on both sides of the outer casing 4. A side pad 16 is provided in the slope groove 15. A buffer steel plate 17 that abuts against the side wall of the inclined leg body 2 of the rigid frame bridge is fixedly connected to the upper end of the side pad 16. Bolt connectors for fixing the side pad 16 are provided on both sides of the outer casing 4. The side pad 16 and the buffer steel plate 17 can flexibly deform and buffer the vibration generated by the inclined leg body 2 of the rigid frame bridge.
[0033] As an optional implementation, the bolted connector includes a fixing hole 18 on the side wall of the outer casing 4. A threaded sleeve 19 that is inserted into the fixing hole 18 is fixedly connected to the side wall of the side pad 16. A bolt 20 is threadedly connected to the threaded sleeve 19. By inserting the threaded sleeve 19 on the side pad 16 into the fixing hole 18 (the length of the threaded sleeve 19 is shorter than the length of the fixing hole 18), the bolt 20 is rotated in the threaded sleeve 19 to complete the fixing of the side pad 16 and the buffer steel plate 17.
[0034] Specifically, several protruding strips 21 are fixedly connected to the lower side wall of the outer casing 4. After the outer casing 4 is placed in the installation groove 3 and concrete is poured, the protruding strips 21 can improve the fit between the outer casing 4 and the foundation ground 1, making the connection between the outer casing 4 and the foundation ground 1 more secure.
[0035] During installation, two square sleeves 6 are respectively fitted onto the two side protrusions 5. Then, the pad 14 is placed inside the outer casing 4, with its two sides located in the two side grooves 8. Next, the threaded sleeve 19 on the side pad 16 is inserted into the fixing hole 18 (the length of the threaded sleeve 19 is shorter than the length of the fixing hole 18). The bolt 20 is rotated in the threaded sleeve 19 to fix the side pad 16 and the buffer steel plate 17. The outer casing 4 is then fitted onto the lower end of the inclined leg body 2 of the rigid frame bridge. At this time, the square sleeves 6 slide into the two side grooves 8, and the inclined leg body 2 of the rigid frame bridge... The lower end of the shim abuts against the pad 14. Then, the limiting plate 9 is inserted into the two sliding grooves 8, and the position of the limiting plate 9 is fixed by inserting bolt 11 to limit the position of the square sleeve 6 in the sliding groove 8. Then, the outer casing 4 is placed in the installation groove 3 on the foundation ground 1 and concrete is poured to fit with several protruding strips 21. Through the cooperation between the pad 14, the limiting plate 9, the two side pads 16 and the two buffer steel plates 17, the vibration energy transmitted by the inclined leg body 2 of the rigid frame bridge can be absorbed, and flexible deformation buffering can be performed to improve the seismic resistance of the structure.
[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A reinforced concrete hinge structure for a sloping-leg rigid frame bridge, characterized in that: The system includes a foundation ground (1) and a rigid frame bridge inclined leg body (2). The foundation ground (1) has an installation groove (3) inside. An outer casing (4) is provided in the installation groove (3), and the rigid frame bridge inclined leg body (2) is fitted in the outer casing (4). Both sides of the lower end of the rigid frame bridge inclined leg body (2) are fixedly connected with protrusions (5). The inner walls of both sides of the outer casing (4) are provided with limiting structures to restrict the position of the protrusions (5). The other two side walls of the outer casing (4) are provided with buffer support members to limit the offset of the rigid frame bridge inclined leg body (2).
2. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 1, characterized in that: The protrusion (5) is cylindrical in shape, and a square sleeve (6) is provided at the protrusion (5). The square sleeve (6) has a through hole (7) that fits onto the protrusion (5).
3. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 2, characterized in that: The inner wall of the outer casing (4) is provided with a sliding groove (8) that is adapted to slide the square sleeve block (6), and the square sleeve block (6) and the sliding groove (8) are fitted with a clearance. The limiting structure includes a limiting insert plate (9) inserted into the sliding groove (8), and a bolt connector for fixing the limiting insert plate (9) is provided at the port of the outer casing (4).
4. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 3, characterized in that: The bolted connector includes a through hole (10) at the end of the limiting insert (9), and a bolt (11) is inserted into the through hole (10). The end face of the outer casing (4) is provided with a bolt hole (12) that is threadedly connected to the bolt (11).
5. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 4, characterized in that: The outer casing (4) has fitting grooves (13) that penetrate the sliding groove (8) on both sides of the end wall. The end of the limiting plate (9) is a convex design that matches the fitting groove (13). The perforation (10) is opened on the convex part of the end of the limiting plate (9).
6. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 3, characterized in that: The inner bottom of the outer box (4) is provided with a pad (14), which is a cross-shaped design, with the two protruding parts on both sides slidingly connected in two grooves (8). The surface of the pad (14) abuts against the bottom end of the inclined leg body (2) of the rigid frame bridge.
7. A reinforced concrete hinge structure for a sloping-leg rigid frame bridge according to claim 6, characterized in that: Both the pad (14) and the limiting plate (9) are composite blocks made of metal and rubber.
8. The reinforced concrete hinge structure of a sloping-leg rigid frame bridge according to claim 1, characterized in that: The buffer support includes a slope groove (15) on both sides of the outer casing (4). The slope groove (15) is provided with a side pad (16). The upper end of the side pad (16) is fixedly connected to a buffer steel plate (17) that abuts against the side wall of the inclined leg body (2) of the rigid frame bridge. Both sides of the outer casing (4) are provided with bolts for fixing the side pad (16).
9. A reinforced concrete hinge structure for a sloping leg rigid frame bridge according to claim 1, characterized in that: The second bolted connector includes a fixing hole (18) on the side wall of the outer casing (4), and a threaded sleeve (19) that is inserted into the fixing hole (18) is fixedly connected to the side wall of the side pad (16), and a bolt (20) is threadedly connected to the threaded sleeve (19).
10. A reinforced concrete hinge structure for a sloping leg rigid frame bridge according to claim 1, characterized in that: Several protruding strips (21) are fixedly connected to the lower side wall of the outer box (4).