Bridge deck bending and twisting control device for large-span bridge
The long-span bridge deck bending and torsion control device addresses the challenge of vertical vibrations in long-span bridges by using a system of levers, springs, and airbags to amplify damper stroke and energy consumption, effectively reducing bending and torsion, ensuring safety and reliability.
Patent Information
- Application Number
- CN202411496227.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2024-12-17
AI Technical Summary
Existing technologies struggle to effectively control bending and torsional deformation in long-span bridges, particularly under dynamic loads, due to insufficient energy consumption by traditional dampers, which fail to manage vertical vibrations and compromise bridge stability and safety.
A long-span bridge deck bending and torsion control device comprising a crossbeam, regulating components with levers and connecting rods, pre-stressed springs, and auxiliary components with sliding frames and airbags, which amplify damper stroke and energy consumption, forming a vertical bending and torsion control system to manage vertical displacements and reduce shear forces.
The device enhances vertical shock absorption, reduces bending and torsion degrees, and ensures safety and reliability by amplifying damper stroke and energy consumption, thereby minimizing structural damage and improving seismic performance.
Smart Images
Figure CN119145290A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of long-span bridges, and in particular to a long-span bridge deck bending and torsion control device. Background Art
[0002] With the development of society and the growth of demand, bridge design tends to build bridge structures with larger spans. However, the increase in span makes the bridge more flexible, with a lower fundamental frequency and reduced damping, which makes long-span bridges more prone to significant vibration when subjected to dynamic loads. In particular, vertical vibration may cause bending or torsional deformation of the bridge deck, posing a serious threat to the stability and safety of the bridge;
[0003] The common bending and torsion control device of the bridge deck of a large-span bridge is a damper, which reduces the vibration of the bridge by consuming vibration energy. However, the energy consumption of the traditional damper has a bottleneck and cannot effectively control the vertical vibration of the large-span bridge. Therefore, a bending and torsion control device for the bridge deck of a large-span bridge is proposed. Summary of the invention
[0004] The purpose of the present invention is to provide a long-span bridge deck bending and torsion control device, which can effectively reduce the bending and torsion of the long-span bridge and improve the seismic performance of the long-span bridge.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-span bridge deck bending and torsion control device, comprising a large-span bridge body, a crossbeam is arranged at the bottom of the bridge tower of the large-span bridge body, the crossbeam is located at the bottom of the bridge deck of the large-span bridge body, two groups of first lower ear plates are symmetrically fixed on the right side of the top of each group of the crossbeams along the front-to-back direction, a regulating component used in conjunction with the large-span bridge body is arranged on the crossbeam, and an auxiliary component used in conjunction with the regulating component is arranged on one side of the crossbeam.
[0006] Preferably, the regulating component includes a lever rotatably mounted on the first lower ear plate, one end of the lever is rotatably mounted with a connecting rod and the top end of the connecting rod is rotatably mounted on the bottom of the bridge deck of the long-span bridge body, the other end of the lever is rotatably mounted with a docking column, the bottom end of the docking column is provided with a damper, and a plurality of groups of second lower ear plates are fixed in sequence along the front-to-back direction on the right side of each group of the cross beams, the bottom end of the damper is rotatably mounted on the side of two adjacent groups of second lower ear plates close to each other through a movable shaft, a pre-stressed spring is rotatably mounted on one side of each group of the docking columns, an upper ear plate is rotatably mounted on the end of the pre-stressed spring away from the docking column, and the top end of the upper ear plate is fixed on the bridge deck of the long-span bridge body.
[0007] Preferably, the auxiliary component includes a fixing seat symmetrically fixed to the lever near one end of the connecting rod along the front-to-back direction, two groups of sliding frames are symmetrically inserted along the front-to-back direction on the left side of each group of beams, and fixing grooves are opened on the front and back sides of the top of each group of sliding frames, and one end of the fixing seat is inserted in the fixing groove, two groups of guard plates are symmetrically fixed to the left side of each group of beams along the front-to-back direction, and the left side of the sliding frame is attached to the guard plate, and four groups of cylinders are fixed in sequence on one side of the bottom of each group of beams along the front-to-back direction, a piston rod is slidably arranged in each group of cylinders, and the bottom end of the piston rod passes through the cylinder and is fixed on the sliding frame, and each group of cylinders Two groups of butt joints are connected in sequence along the up and down directions on the right side, a box body is fixed on the surface of each group of butt joints, the top of the upper box body is embedded in the bottom of the crossbeam, one end of the butt joint inside the box body is connected with an airbag, a reinforcing plate is fixed on the side where the upper and lower groups of box bodies are close to each other, a contact plate that fits on the airbag is slidably provided on the front and back sides of each group of box bodies, T-shaped rods are inserted on both sides of the front and back sides of each group of box bodies, one end of the T-shaped rods of two adjacent groups are fixed on the contact plates, an auxiliary spring is wound on each group of T-shaped rods, and both ends of the auxiliary spring are fixed on the protruding ends of the T-shaped rods and the box body.
[0008] Preferably, a limiting frame is symmetrically fixed to the top of the right side of each group of beams along the front-to-back direction and the damper is inserted into the limiting frame, and a plurality of groups of rollers attached to the damper are installed on the front and back sides of each group of limiting frames so as to rotate in sequence along the up-down direction.
[0009] Preferably, one end of the fixing seat inserted into the fixing groove is in a rod-shaped structure.
[0010] Preferably, a circular placement groove is formed at one end of the fixing seat close to the lever.
[0011] Preferably, there is a gap between the bottom of the cylinder and the bottom of the inner cavity of the sliding frame.
[0012] Preferably, tops and bottoms of two adjacent groups of cylinders that are away from each other are connected to an inflation tube, and an auxiliary valve is provided on each group of inflation tubes.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] In the present invention, the prestressed spring is prestressed and deformed in advance, so that it is still in a compressed state within a certain elongation displacement. When the bridge deck of the long-span bridge body and the crossbeam undergo vertical relative displacement, the prestressed spring is in a compressed state, generating a force consistent with the direction of movement, i.e., a negative stiffness force, thereby reducing the bottom shear force of the bridge structure, reducing the damage to the bridge structure, and improving the vertical shock absorption performance of the bridge. By setting a regulating component, with the cooperation of a lever and a connecting rod, the lever principle can be used to amplify the vertical displacement to both ends of the damper, thereby increasing the stroke of the damper, realizing the amplification of the energy consumption of the damper, and reducing the demand for the tonnage of the damper. Multiple groups of regulating components arranged on both sides of the bridge deck of the long-span bridge body together constitute a vertical bending and torsion control system, which can simultaneously control the vertical displacements of the bridge deck of the long-span bridge body in the same or different directions on both sides, reducing the bending and torsion degree of the bridge deck of the long-span bridge body, improving the vertical shock absorption performance of the long-span bridge body, and ensuring the safety and reliability of the long-span bridge body. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a large-span bridge deck bending and torsion control device of the present invention;
[0016] Figure 2 A bottom view of the structure of a large-span bridge deck bending and torsion control device according to the present invention;
[0017] Figure 3 for Figure 2 A magnified view of the structure at center A;
[0018] Figure 4 It is a partial three-dimensional diagram of the structure of a large-span bridge deck bending and torsion control device of the present invention;
[0019] Figure 5 It is a partial side elevation view of the structure of a large-span bridge deck bending and torsion control device of the present invention;
[0020] Figure 6 It is a structural stereogram of the control component of the present invention;
[0021] Figure 7 A partial cross-sectional view of the structure of the auxiliary component of the present invention;
[0022] Figure 8 It is a force-displacement curve diagram of a scaled test of a large-span bridge deck bending and torsion control device of the present invention.
[0023] In the figure: 1. long-span bridge body; 2. crossbeam; 3. first lower ear plate; 4. lever; 5. connecting rod; 6. docking column; 7. damper; 8. upper ear plate; 9. preload spring; 10. limit frame; 11. roller; 12. fixed seat; 13. sliding frame; 14. guard plate; 15. fixing groove; 16. cylinder; 17. piston rod; 18. docking tube; 19. box body; 20. T-bar; 21. auxiliary spring; 22. airbag; 23. contact plate; 24. reinforcement plate; 25. second lower ear plate. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0025] Example
[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8The present invention provides a technical solution: a long-span bridge deck bending and torsion control device, comprising a long-span bridge body 1, a crossbeam 2 is arranged at the bottom of the bridge tower of the long-span bridge body 1, the crossbeam 2 is located at the bottom of the bridge deck of the long-span bridge body 1, two groups of first lower ear plates 3 are symmetrically fixed on the right side of the top of each group of crossbeams 2 along the front-to-back direction, a regulating component used in conjunction with the long-span bridge body 1 is arranged on the crossbeam 2, the regulating component comprises a lever 4 rotatably mounted on the first lower ear plate 3, a connecting rod 5 is rotatably mounted on one end of the lever 4 and the top end of the connecting rod 5 is rotatably mounted on the bottom of the bridge deck of the long-span bridge body 1, a docking column 6 is rotatably mounted on the other end of the lever 4, a damper 7 is arranged at the bottom end of the docking column 6, a plurality of groups of second lower ear plates 25 are sequentially fixed on the right side of each group of crossbeams 2 along the front-to-back direction, and the bottom end of the damper 7 is rotatably mounted on two adjacent ones through a movable shaft. On the side where the second lower ear plates 25 of the group are close to each other, the damper 7 includes but is not limited to a viscous damper, a viscoelastic damper, a friction damper or a metal damper. The top of the right side of each group of beams 2 is symmetrically fixed with a limit frame 10 along the front-to-back direction, and the damper 7 is inserted in the limit frame 10. The front and back sides of each group of limit frames 10 are successively rotated along the up-down direction and are equipped with a plurality of groups of rollers 11 attached to the damper 7. By setting the limit frames 10 and the rollers 11, the front and back positions of the damper 7 can be limited to avoid its front and back shaking, which affects the use effect. A pre-stressed spring 9 is rotatably installed on one side of each group of docking columns 6. The pre-stressed spring 9 includes but is not limited to a coil spring, a disc spring, an annular spring or an air spring. An upper ear plate 8 is rotatably installed on the end of the pre-stressed spring 9 away from the docking column 6, and the top of the upper ear plate 8 is fixed on the bridge deck of the large-span bridge body 1. And attached Figure 8 It is the force-displacement curve diagram of the scaled test of the regulating component. The prestressed spring 9 is pre-stressed and deformed so that it is still in a compressed state within a certain elongation displacement. The prestressed spring 9 with this feature and the lever 4 form a negative stiffness system, and the negative stiffness reduces the bottom shear force of the structure and reduces the damage to the structure. By setting the regulating component, the lever principle is used to amplify the stroke of the damper 7, thereby increasing the energy consumption of the damper 7, improving the vertical shock absorption performance of the bridge, and reducing the demand for the damper tonnage. The multiple groups of regulating components arranged on both sides of the bridge deck of the large-span bridge body 1 together constitute a vertical bending and torsion control system, which can simultaneously control the vertical displacements of the bridge deck of the large-span bridge body 1 in the same or different directions, reduce the bending and torsion degree of the bridge deck of the large-span bridge body 1, improve the vertical shock absorption performance of the large-span bridge body 1, and ensure the safety and reliability of the large-span bridge body 1.
[0027] See also Figure 1 , Figure 2 , Figure 5 and Figure 7One side of the cross beam 2 is provided with an auxiliary component used in conjunction with the regulating component, the auxiliary component includes a fixed seat 12 symmetrically fixed to one end of the lever 4 near the connecting rod 5 along the front-to-back direction, two sets of sliding frames 13 are symmetrically inserted along the front-to-back direction on the left side of each set of cross beams 2, and a fixing groove 15 is provided on the front and back of the top of each set of sliding frames 13. One end of the fixed seat 12 is inserted into the fixing groove 15, and one end of the fixed seat 12 inserted into the fixing groove 15 is a rod-shaped structure. The fixed seat 12 with one end designed as a rod-shaped structure inserted in the fixing groove 15 can make the fixed seat 12 move stably in the fixing groove 15 without any obstruction. The left side of each set of cross beams 2 along the front-to-back direction Two groups of guard plates 14 are symmetrically fixed and the left side of the sliding frame 13 is attached to the guard plate 14. A circular placement groove is opened at one end of the fixed seat 12 close to the lever 4. The design of the circular placement groove prevents one end of the fixed seat 12 from contacting the movable shaft on the lever 4. Four groups of cylinders 16 are fixed in sequence along the front-to-back direction on one side of the bottom of each group of crossbeams 2. A piston rod 17 is slidably arranged in each group of cylinders 16, and the bottom end of the piston rod 17 passes through the cylinder 16 and is fixed on the sliding frame 13. Two groups of butt pipes 18 are connected in sequence along the up-down direction on the right side of each group of cylinders 16. A box body 19 is fixed on the surface of each group of butt pipes 18, and the top of the upper box body 19 is embedded in the bottom of the crossbeam 2. , one end of the butt-joint pipe 18 located in the box body 19 is connected with an air bag 22, a reinforcing plate 24 is fixed on the side where the upper and lower sets of box bodies 19 are close to each other, the tops and bottoms of the two adjacent sets of cylinder bodies 16 that are far away from each other are connected with an inflation tube, and each set of inflation tubes is provided with an auxiliary valve. The design of the inflation tube and the auxiliary valve can replenish air in the cylinder body 16, and the front and back of each set of box bodies 19 are slidably provided with a contact plate 23 that fits on the air bag 22, and both sides of the front and back of each set of box bodies 19 are inserted with T-shaped rods 20, one end of the two adjacent sets of T-shaped rods 20 is fixed on the contact plate 23, and each set of T-shaped rods 20 is wound with an auxiliary spring 21 and the auxiliary spring 2 The two ends of 1 are fixed on the protruding ends of the T-bar 20 and the box body 19. By setting up auxiliary components and utilizing multiple and multi-form buffering methods, the bending and torsion degree of the bridge deck of the long-span bridge body 1 can be assisted to reduce when the bridge deck of the long-span bridge body 1 and the crossbeam 2 undergo vertical relative displacement. There is a spacing between the bottom of the cylinder 16 and the bottom of the inner cavity of the sliding frame 13. The design of the spacing gives the sliding frame 13 a certain rising space to improve the buffering effect on the bridge deck of the long-span bridge body 1. The design of the auxiliary component at the other end of the regulating component is only a further assistance to the regulating component and will not affect the normal operation and normal measurement data of the regulating component.
[0028] Working principle: The deck of the long-span bridge body 1 will vibrate vertically under extreme loads such as earthquakes or strong winds, causing the deck of the long-span bridge body 1 to twist, bend or bend-torsion coupled deformation, which seriously affects the safety and use of the long-span bridge body 1. When the above displacement occurs, the relative distance between the top of the connecting rod 5 and the first lower ear plate 3 changes. At this time, the connecting rod 5 will drive one end of the lever 4 to rotate, and the other end of the lever 4 will drive the damper 7 and the pre-stress spring 9 to rotate synchronously. The design of the pre-stress spring 9, by pre-applying pre-stress deformation in advance, makes the pre-stress spring 9 still in a compressed state within a certain elongation displacement. The pre-stress spring 9 with this feature releases the pre-stress when the lever 4 rotates, reducing the bottom shear force and damage of the structure, and improving the vertical shock absorption performance of the bridge. At the same time, the vertical displacement can be amplified to the two ends of the damper 7 by using the principle of the lever 4, increasing the stroke of the damper 7, realizing the amplification of the energy consumption of the damper 7, reducing the demand for the damper tonnage, and further improving the vertical shock absorption performance of the bridge. The multiple control components arranged on both sides of the bridge deck of the long-span bridge body 1 together constitute a vertical bending and torsion control system, which can simultaneously control the vertical displacement of the bridge deck of the long-span bridge body 1 in the same or different directions, reduce the bending and torsion degree of the bridge deck of the long-span bridge body 1, improve the vertical shock absorption performance of the long-span bridge body 1, and ensure the safety and reliability of the long-span bridge body 1. When the lever 4 is subjected to force, the fixed seat 12 will change the upper and lower positions of the sliding frame 13, so that the position of the piston rod 17 can be changed synchronously. At this time, the active The plug rod 17 can quickly transport the gas in the cylinder 16 to the airbag 22 via the docking tube 18. The elastic force of the airbag 22 can be used to initially buffer the pressure. As the gas continues to flow in, the airbag 22 will continue to expand. At this time, the expanded airbag 22 will squeeze the contact plate 23 and stretch the auxiliary spring 21 synchronously. At this time, the elastic rebound of the auxiliary spring 21 can form a certain resistance to the expansion of the airbag 22, thereby further buffering the pressure to help reduce the bending and torsion of the bridge deck of the large-span bridge body 1.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A long-span bridge deck bending and torsion control device, comprising a long-span bridge body (1), characterized in that: A crossbeam (2) is arranged at the bottom of the bridge tower of the large-span bridge body (1), and the crossbeam (2) is located at the bottom of the bridge deck of the large-span bridge body (1). Two groups of first lower ear plates (3) are symmetrically fixed on the right side of the top of each group of crossbeams (2) along the front-back direction. A regulating component used in conjunction with the large-span bridge body (1) is arranged on the crossbeam (2), and an auxiliary component used in conjunction with the regulating component is arranged on one side of the crossbeam (2).
2. A long-span bridge deck bending and torsion control device according to claim 1, characterized in that: The regulating component comprises a lever (4) rotatably mounted on a first lower ear plate (3), one end of the lever (4) being rotatably mounted with a connecting rod (5), and the top end of the connecting rod (5) being rotatably mounted on the bottom of the bridge deck of the long-span bridge body (1), the other end of the lever (4) being rotatably mounted with a docking column (6), the bottom end of the docking column (6) being provided with a damper (7), a plurality of groups of second lower ear plates (25) being fixed in sequence along the front-rear direction on the right side of each group of the cross beams (2), the bottom end of the damper (7) being rotatably mounted on the side of two adjacent groups of second lower ear plates (25) close to each other through a movable shaft, a preload spring (9) being rotatably mounted on one side of each group of the docking columns (6), the end of the preload spring (9) away from the docking column (6) being rotatably mounted with an upper ear plate (8), and the top end of the upper ear plate (8) being fixed on the bridge deck of the long-span bridge body (1).
3. The long-span bridge deck bending and torsion control device according to claim 1 is characterized in that: The auxiliary component comprises a fixing seat (12) symmetrically fixed to the lever (4) near one end of the connecting rod (5) along the front-to-back direction; two sets of sliding frames (13) are symmetrically inserted on the left side of each set of the cross beams (2) along the front-to-back direction; the front and back sides of the top of each set of the sliding frames (13) are provided with fixing grooves (15), and one end of the fixing seat (12) is inserted in the fixing groove (15); two sets of guard plates (14) are symmetrically fixed on the left side of each set of the cross beams (2) along the front-to-back direction, and the left side of the sliding frame (13) is attached to the guard plate (14); four sets of cylinders (16) are fixed in sequence on one side of the bottom of each set of the cross beams (2) along the front-to-back direction; a piston rod (17) is slidably arranged in each set of the cylinders (16), and the bottom end of the piston rod (17) passes through the cylinder (16) and is fixed on the sliding frame (13); the right side of each set of the cylinders (16) along the upper and lower sides Two groups of butt-joint pipes (18) are connected in sequence, a box body (19) is fixed on the surface of each group of butt-joint pipes (18), the top of the upper box body (19) is embedded in the bottom of the crossbeam (2), one end of the butt-joint pipe (18) located in the box body (19) is connected with an air bag (22), a reinforcing plate (24) is fixed on the side close to each other of the upper and lower groups of box bodies (19), a contact plate (23) affixed to the air bag (22) is slidably arranged on the front and back of each group of box bodies (19), T-shaped rods (20) are inserted on both sides of the front and back of each group of box bodies (19), one end of the two adjacent groups of T-shaped rods (20) is fixed on the contact plate (23), an auxiliary spring (21) is wound on each group of T-shaped rods (20), and the two ends of the auxiliary spring (21) are fixed on the protruding ends of the T-shaped rods (20) and the box body (19).
4. A long-span bridge deck bending and torsion control device according to claim 2, characterized in that: A limiting frame (10) is symmetrically fixed to the top of the right side of each group of cross beams (2) along the front-to-back direction, and the damper (7) is inserted into the limiting frame (10). A plurality of groups of rollers (11) attached to the damper (7) are sequentially mounted on the front and back sides of each group of limiting frames (10) so as to rotate in sequence along the up-down direction.
5. The long-span bridge deck bending and torsion control device according to claim 3 is characterized in that: One end of the fixing seat (12) inserted into the fixing groove (15) is in a rod-shaped structure.
6. The long-span bridge deck bending and torsion control device according to claim 3 is characterized in that: A circular placement groove is formed at one end of the fixing seat (12) close to the lever (4).
7. The long-span bridge deck bending and torsion control device according to claim 3 is characterized in that: There is a gap between the bottom of the cylinder (16) and the bottom of the inner cavity of the sliding frame (13).
8. The long-span bridge deck bending and torsion control device according to claim 3 is characterized in that: The tops and bottoms of two adjacent groups of cylinders (16) that are away from each other are both connected with an inflation pipe, and an auxiliary valve is arranged on each group of inflation pipes.