Secondary self-emergency anti-beam-falling device for bridge

Abstract

The utility model discloses a secondary self-emergency anti-beam-falling device for a bridge. A bridge damper can only play a role in preventing falling within an expected value of the change of an expansion joint, and once the expected value is exceeded, the bridge damper is damaged and loses action, and a secondary anti-falling structure is lacked, so that a role in preventing beam falling cannot be played any more. A first hinge seat, a first connecting ring, a damper, a second connecting ring, a second hinge seat and a steel strand are included, the first hinge seat and the second hinge seat are arranged side by side, one end of the first connecting ring is hinged to the first hinge seat, and the other end of the first connecting ring is connected with one end of the damper. The other end of the damper is arranged at one end of the second connecting ring, the other end of the second connecting ring is hinged to the second hinge seat, one end of the steel strand is arranged on the damper, and the other end of the steel strand penetrates through the second connecting ring to be connected with the beam body. The steel strand piece comprises a steel strand, a third connecting ring, a square base, a bolt, two end connecting blocks and two lugs.

Description

Technical Field

[0001] This utility model specifically relates to a secondary self-emergency anti-fall beam device for bridges, belonging to the field of road and bridge technology. Background Technology

[0002] Bridge dampers play a crucial role in bridge structures. They reduce bridge vibration amplitude by dissipating energy. Utilizing the properties of damping materials or devices, they convert vibrational energy into other forms of energy to dissipate it, effectively reducing bridge vibration under external forces such as wind, vehicle traffic, and earthquakes. For example, viscous dampers dissipate energy through the viscosity of liquids, while friction dampers convert vibrational energy into heat energy through friction. Dampers can suppress bridge resonance, increase the system's damping ratio, and reduce resonance response, thereby improving the stability of the bridge structure. Furthermore, dampers reduce the rate of structural fatigue damage by decreasing vibration amplitude and stress amplitude, extending the bridge's service life. For pedestrian bridges, dampers can also reduce vibrations generated by pedestrians, improving the bridge's performance and comfort.

[0003] Bridge dampers generally have two connection methods. One method involves connecting both ends of the damper to the two beams, suitable for situations where damping force needs to be directly transmitted between the beams. The other method involves connecting one end of the damper to a beam and the other end to a pier, effectively suppressing relative movement between the beams and the piers. Regardless of the connection method, the variation of the expansion joint between the two beams must not exceed its expected value. If the beam is subjected to excessive stress, and the expansion joint variation exceeds its expected value, the bridge damper may be damaged and become ineffective. In this case, the beam, without the protection of the bridge damper, is at risk of falling, which would not only endanger the safety of the bridge but also potentially lead to severe traffic disruptions and economic losses.

[0004] Steel strands are also installed around bridge dampers for protection. The application of bridge steel strands can effectively absorb seismic energy and reduce earthquake damage to bridges. Bridge steel strands have high tensile strength and good flexibility, and can provide strong tensile force under seismic action to ensure the stability of the bridge.

[0005] When the bridge damper loses its protective function after damage, although the bridge steel strand can provide secondary protection, the installation position of the bridge steel strand is not at the main stress position because the bridge damper is installed at the main stress position, so the bridge steel strand cannot play its maximum role. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, a secondary self-emergency anti-fall beam device for bridges is provided to solve the above problems.

[0007] A secondary self-emerging anti-fall beam device for bridges is a damping device for secondary self-emerging anti-fall beams used in bridges. This device includes a first hinge seat, a first connecting ring, a damper, a second connecting ring, a second hinge seat, and a steel strand. The first and second hinge seats are arranged side-by-side. One end of the first connecting ring is hinged to the first hinge seat, and the other end is connected to one end of the damper. The other end of the damper is mounted on one end of the second connecting ring, which is hinged to the second hinge seat. One end of the steel strand is mounted on the damper, and the other end passes through the second connecting ring and connects to the beam body. The steel strand includes a steel strand, a third connecting ring, a square base, bolts, and two ends. The device comprises a connecting block and two lugs, a steel strand, a third connecting ring, and two end connecting blocks arranged coaxially. The two end connecting blocks are respectively mounted on the damper and the third connecting ring. The two lugs are vertically arranged side by side on a square base. The steel strand passes between the second connecting ring and the damper. One end of the steel strand is connected to the damper through one of the two end connecting blocks, and the other end of the steel strand is connected to one end of the third connecting ring through the other of the two end connecting blocks. The other end of the third connecting ring is located between the two lugs. Each lug has an elongated hole machined along its length. A bolt passes through the third connecting ring, and both ends of the bolt slide into the two elongated holes. A metal rubber gasket is provided on the inner wall of each end of the elongated hole.

[0008] As a preferred embodiment: the damper includes a piston rod, a piston, an upper end cover, a lower end cover, a connecting cylinder, and a cylinder. One end of the cylinder is coaxially fitted with one end of the connecting cylinder. The upper end cover and the lower end cover are respectively located at both ends of the cylinder. One end of the piston rod is located on the first connecting ring. The other end of the piston rod passes between the upper end cover and the lower end cover in sequence. The piston is located inside the cylinder and is fitted onto the piston rod. One end of the steel strand passes through the connecting cylinder. The other end of the piston rod is connected to one of the two end connecting blocks.

[0009] As a preferred embodiment: both the first hinge seat and the second hinge seat are square bases, and a positioning hole is machined at each of the four corners of the first hinge seat and the four corners of the second hinge seat. Positioning holes are also machined at the four corners of the square base.

[0010] As a preferred embodiment, the second connecting ring is cylindrical in shape, and one end of the second connecting ring is machined with a blind hole for connecting with the end connecting block.

[0011] As a preferred embodiment, the structure includes a first hinge seat, a first connecting ring, a damper, a second connecting ring, a second hinge seat, and a steel strand mechanism. The first and second hinge seats are arranged side by side. One end of the first connecting ring is hinged to the first hinge seat, and the other end of the first connecting ring is connected to one end of the damper. The other end of the damper is located on one end of the second connecting ring, and the other end of the second connecting ring is hinged to the second hinge seat. The steel strand mechanism is located between the damper and the beam. The steel strand mechanism includes a steel strand body, an anchor, and a fixed cone. One end of the steel strand body passes through the damper and is connected to the first connecting ring. The other end of the steel strand body is connected to the beam in sequence through the anchor and the fixed cone.

[0012] As a preferred embodiment: the fixing cone is a metal rubber block, which includes a hemispherical end cap, a conical frustum and a bottom frustum. The hemispherical end cap, the conical frustum and the bottom frustum are coaxially arranged. One end of the bottom frustum is connected to the main body of the steel strand, and the other end of the bottom frustum is fixedly connected to the conical frustum. The hemispherical end cap is fixedly connected to the conical frustum.

[0013] As a preferred embodiment: the damper includes a piston rod, a piston, an upper end cover, a lower end cover, a connecting cylinder, and a cylinder. One end of the cylinder is coaxially fitted with one end of the connecting cylinder. The upper end cover and the lower end cover are respectively located at both ends of the cylinder. One end of the piston rod is located on the first connecting ring, and the other end of the piston rod is sequentially passed between the upper end cover and the lower end cover. The piston is located inside the cylinder and is fitted onto the piston rod. The main body of the steel strand is passed through the connecting cylinder.

[0014] A secondary self-emergency anti-falling beam device for bridges, characterized in that it includes a first hinge seat, a first connecting ring, and a steel strand. The first hinge seat is hinged to one end of the first connecting ring, and the other end of the first connecting ring is provided with a steel strand. The steel strand includes a steel strand, a third connecting ring, a square base, a bolt, two end connecting blocks, and two lugs. The steel strand, the third connecting ring, and the two end connecting blocks are coaxially arranged. The two end connecting blocks are respectively disposed on a damper and the third connecting ring. The two lugs are vertically arranged side by side on the square base. The steel strand passes between the second connecting ring and the damper. One end of the steel strand is connected to the damper through one of the two end connecting blocks, and the other end of the steel strand is connected to one end of the third connecting ring through the other end connecting block. The other end of the third connecting ring is disposed between the two lugs. Each lug has an elongated hole along its length. The bolt passes through the third connecting ring, and both ends of the bolt are slidably engaged with the two elongated holes. A metal rubber gasket is provided on the inner wall of each end of the elongated hole.

[0015] The beneficial effects of this utility model are as follows:

[0016] In the initial state, the two beams of this utility model are connected by a damper, which plays the main role in shock absorption and preventing beam fall. When the beam is subjected to excessive force and the damper is damaged and loses its function, the steel strand, end connecting block, third connecting ring, lug, and square base of this utility model form a second protection, pulling the two beams together to prevent beam fall. Moreover, since the steel strand is coaxial with the damper, the steel strand is still in the main stress position when the beam changes, so that the steel strand can exert the maximum protection effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 A schematic diagram of a half-section three-dimensional structure of the damper;

[0019] Figure 3 This is a three-dimensional structural diagram of the steel strand;

[0020] Figure 4 This is a schematic diagram of a half-section three-dimensional structure of the connecting cylinder and the second connecting ring;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the steel strand;

[0022] Figure 6 This is a schematic diagram illustrating the usage effect of the first embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram illustrating the usage effect of the second form of this utility model;

[0024] Figure 8 This is a schematic diagram illustrating the usage effect of the third form of this utility model;

[0025] Figure 9 This is a partial three-dimensional structural diagram of the steel strand;

[0026] Figure 10 This is a three-dimensional structural diagram of specific implementation method six;

[0027] Figure 11 This is a three-dimensional structural diagram of specific implementation method nine;

[0028] Figure 12 This is a top view structural diagram of specific implementation method nine;

[0029] Figure 13 This is a schematic diagram of the three-dimensional structure of the fixed cone block.

[0030] In the diagram: 1-First hinge seat; 2-First connecting ring; 3-Damper; 3-1-Piston rod; 3-2-Piston; 3-3-Upper end cover; 3-4-Lower end cover; 3-5-Connecting cylinder; 3-6-Cylinder; 4-Second connecting ring; 5-Second hinge seat; 6-Steel strand; 6-1-Steel strand; 6-2-End connecting block; 6-3-Third connecting ring; 6-4-Ear; 6-4-1-Elongated hole; 6-5-Square base; 6-6-Bolt; 6-7-Metal rubber gasket; 7-Beam; 8-Pier; 9-Expansion joint; 10-Steel strand mechanism; 10-1Steel strand body; 10-2Anchor; 10-3Fixed cone; 10-3-1-Hemispherical end cap; 10-3-2-Conical frustum; 10-3-3-Bottomed frustum. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0032] Specific implementation method one: Combining Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9This embodiment describes a secondary self-emerging anti-falling beam device for bridges. It is a secondary self-emerging anti-falling beam damping device for bridges, comprising a first hinge seat 1, a first connecting ring 2, a damper 3, a second connecting ring 4, a second hinge seat 5, and a steel strand 6. The first hinge seat 1 and the second hinge seat 5 are arranged side-by-side. One end of the first connecting ring 2 is hinged to the first hinge seat 1, and the other end of the first connecting ring 2 is connected to one end of the damper 3. The other end of the damper 3 is disposed on one end of the second connecting ring 4, and the other end of the second connecting ring 4 is hinged to the second hinge seat 5. One end of the steel strand 6 is disposed on the damper 3, and the other end of the steel strand 6 passes through the first hinge seat 5. The second connecting ring 4 is connected to the beam 7; the steel strand 6 includes a steel strand 6-1, a third connecting ring 6-3, a square base 6-5, a bolt 6-6, two end connecting blocks 6-2, and two lugs 6-4. The steel strand 6-1, the third connecting ring 6-3, and the two end connecting blocks 6-2 are coaxially arranged. The two end connecting blocks 6-2 are respectively mounted on the damper 3 and the third connecting ring 6-3. The two lugs 6-4 are vertically arranged side by side on the square base 6-5. The steel strand 6-1 passes between the second connecting ring 4 and the damper 3. One end of the steel strand 6-1 is connected to the damper 3 through one of the two end connecting blocks 6-2. The other end of the steel strand 6-1 is connected to one end of the third connecting ring 6-3 via another of the two end connecting blocks 6-2. The other end of the third connecting ring 6-3 is positioned between two lugs 6-4. Each lug 6-4 has an elongated hole 6-4-1 machined along its length. A bolt 6-6 passes through the third connecting ring 6-3, with both ends of the bolt 6-6 slidingly engaging with the two elongated holes 6-4-1 respectively. A metal rubber gasket 6-7 is provided on the inner wall of both ends of each elongated hole 6-4-1. The metal rubber gasket 6-7 has variable stiffness characteristics, with a small initial stiffness, and will not significantly affect the energy dissipation of the damper 3. When the displacement of damper 3 approaches its limit displacement, the stiffness of the metal rubber pad 6-7 increases sharply, which can effectively limit the movement of damper 3, thereby solving the problem of damper 3 being damaged due to reaching the displacement limit, so that damper 3 can continue to play an energy dissipation role for the structure. Moreover, the metal rubber pad 6-7 in this embodiment has a certain degree of recoverability and energy dissipation function, and has a secondary energy dissipation function. Compared with traditional liquid viscous dampers, the damper in this embodiment has a stronger energy dissipation capacity under low-speed pulses. The outer surface of the steel strand 6-1 is coated with plastic, and the plastic coating has good corrosion resistance, which can effectively protect the steel strand 6-1 from corrosion.

[0033] When the damper 3 expands or contracts, it pulls the steel strand 6-1 to move. The steel strand 6-1 pulls the third connecting ring 6-3, causing the bolt 6-6 to slide in the elongated hole 6-4-1. This allows the steel strand 6 to move accordingly with the change in the damper 3, ensuring that the normal function of the damper 3 is not affected, and also providing secondary anti-fall protection when the damper 3 fails.

[0034] When the damper 3 fails to function, the steel strand 6-1 comes into play. One end of the steel strand 6-1 is fixed to the damper 3, and the other end of the steel strand 6-1 is fixed to the third connecting ring 6-3. This is equivalent to the two ends of the steel strand 6-1 being fixed to the two beams 7 respectively, which plays a traction role on the two beams 7 that have enlarged the expansion joint 9, preventing the expansion joint 9 between the two beams 7 from continuing to expand and preventing the beams 7 from falling.

[0035] The steel strand 6-1 is coaxially arranged with the damper 3. When the beam 7 changes position, the stress position of the steel strand 6-1 is the same as that of the damper 3, so that the steel strand 6-1 achieves the maximum protective effect.

[0036] In this embodiment, the secondary self-emergency anti-fall beam device for bridges is configured in various ways depending on the configuration of the steel strands 6-1. Specifically, when the additional damping ratio is 6%, three bundles of steel strands 6-1 are configured; when the additional damping ratio is 2.5%, seven bundles of steel strands 6-1 are configured; and when the additional damping ratio is 1.5%, twelve bundles of steel strands 6-1 are configured.

[0037] The damper 3 includes a piston rod 3-1, a piston 3-2, an upper end cover 3-3, a lower end cover 3-4, a connecting cylinder 3-5, and a cylinder 3-6. One end of the cylinder 3-6 is coaxially fitted with one end of the connecting cylinder 3-5. The upper end cover 3-3 and the lower end cover 3-4 are respectively located at both ends of the cylinder 3-6. One end of the piston rod 3-1 is located on the first connecting ring 2, and the other end of the piston rod 3-1 is sequentially inserted between the upper end cover 3-3 and the lower end cover 3-4. The piston 3-2 is located inside the cylinder 3-6 and is fitted onto the piston rod 3-1. One end of the steel strand 6-1 is inserted into the connecting cylinder 3-5, and the other end of the piston rod 3-1 is connected to one of the two end connecting blocks 6-2. The piston rod 3-1, piston 3-2, upper end cover 3-3, lower end cover 3-4, connecting cylinder 3-5, and cylinder 3-6 are coaxially arranged.

[0038] The upper end cover 3-3, the lower end cover 3-4, and the cylinder 3-6 form a cavity containing a medium. As the expansion joint 9 between the two beams 7 changes, the piston rod 3-1 drives the piston 3-2 to move within the cavity, thereby causing the damper 3 to change its length accordingly in response to the changes in the expansion joint 9.

[0039] Both the first hinge seat 1 and the second hinge seat 5 are square bases. A positioning hole is machined at each of the four corners of the first hinge seat 1 and the four corners of the second hinge seat 5. Positioning holes are machined at the four corners of the square base 6-5. The positioning holes make it easier to install this utility model on the beam 7 and the pier 8.

[0040] The outer surfaces of the first hinge seat 1, the first connecting ring 2, the second connecting ring 4, the second hinge seat 5, the square base 6-5, and the two lugs 6-4 are all coated with an anti-corrosion coating. The second connecting ring 4 is cylindrical in shape, and one end of the second connecting ring 4 is machined with a blind hole for connecting with the end connecting block 6-2. The anti-corrosion coating can better protect the first hinge seat 1, the first connecting ring 2, the second connecting ring 4, the second hinge seat 5, the square base 6-5, and the two lugs 6-4 from corrosion.

[0041] Specific Implementation Method Two: Combining Figure 11 , Figure 12 and Figure 13 This embodiment describes a secondary self-emerging anti-falling beam device for bridges. It is a secondary self-emerging anti-falling beam damping device for bridges, comprising a first hinge seat 1, a first connecting ring 2, a damper 3, a second connecting ring 4, a second hinge seat 5, and a steel strand mechanism 10. The first hinge seat 1 and the second hinge seat 5 are arranged side-by-side. One end of the first connecting ring 2 is hinged to the first hinge seat 1, and the other end of the first connecting ring 2 is connected to one end of the damper 3. The other end of the damper 3 is... The steel strand mechanism 10 is located between the damper 3 and the beam 7. The steel strand mechanism 10 includes a steel strand body 10-1, an anchor 10-2, and a fixed cone 10-3. One end of the steel strand body 10-1 passes through the damper 3 and is connected to the first connecting ring 2. The other end of the steel strand body 10-1 is connected to the beam 7 in sequence through the anchor 10-2 and the fixed cone 10-3.

[0042] In this embodiment, the secondary self-emergency anti-fall beam device for bridges is configured in various ways depending on the different configurations of the steel strand main body 10-1. Specifically, when the additional damping ratio is 6%, a three-strand steel strand main body 10-1 is configured; when the additional damping ratio is 2.5%, a seven-strand steel strand main body 10-1 is configured; and when the additional damping ratio is 1.5%, a twelve-strand steel strand main body 10-1 is configured.

[0043] The fixing cone 10-3 is a metal rubber block. The fixing cone 10-3 includes a hemispherical end cap 10-3-1, a conical frustum 10-3-2, and a bottom frustum 10-3-3. The hemispherical end cap 10-3-1, the conical frustum 10-3-2, and the bottom frustum 10-3-3 are coaxially arranged. One end of the bottom frustum 10-3-3 is connected to the main body of the steel strand 10-1, and the other end of the bottom frustum 10-3-3 is fixedly connected to the conical frustum 10-3-2. The hemispherical end cap 10-3-1 is fixedly connected to the conical frustum 10-3-2.

[0044] The damper 3 includes a piston rod 3-1, a piston 3-2, an upper end cover 3-3, a lower end cover 3-4, a connecting cylinder 3-5, and a cylinder 3-6. One end of the cylinder 3-6 is coaxially fitted with one end of the connecting cylinder 3-5. The upper end cover 3-3 and the lower end cover 3-4 are respectively located at both ends of the cylinder 3-6. One end of the piston rod 3-1 is located on the first connecting ring 2, and the other end of the piston rod 3-1 is sequentially inserted between the upper end cover 3-3 and the lower end cover 3-4. The piston 3-2 is located inside the cylinder 3-6 and is fitted onto the piston rod 3-1. The main body of the steel strand 10-1 is inserted inside the connecting cylinder 3-5.

[0045] Specific implementation method three: Combining Figure 10 This embodiment describes a secondary self-emerging anti-falling beam device for bridges. It comprises a first hinged seat 1, a first connecting ring 2, and a steel strand 6. The first hinged seat 1 is hinged to one end of the first connecting ring 2, and the other end of the first connecting ring 2 is provided with the steel strand 6. The steel strand 6 includes a steel strand 6-1, a third connecting ring 6-3, a square base 6-5, bolts 6-6, two end connecting blocks 6-2, and two lugs 6-4. The steel strand 6-1, the third connecting ring 6-3, and the two end connecting blocks 6-2 are coaxially arranged. The two end connecting blocks 6-2 are respectively mounted on the damper 3 and the third connecting ring 6-3, and the two lugs 6-4 are vertically arranged side-by-side on the square base 6-5. Above, a steel strand 6-1 is threaded between the second connecting ring 4 and the damper 3. One end of the steel strand 6-1 is connected to the damper 3 through one of the two end connecting blocks 6-2. The other end of the steel strand 6-1 is connected to one end of the third connecting ring 6-3 through the other of the two end connecting blocks 6-2. The other end of the third connecting ring 6-3 is located between two lugs 6-4. Each lug 6-4 has an elongated hole 6-4-1 along its length. A bolt 6-6 is threaded through the third connecting ring 6-3. The two ends of the bolt 6-6 are slidably engaged with the two elongated holes 6-4-1 respectively. A metal rubber gasket 6-7 is provided on the inner wall of each end of the elongated hole 6-4-1.

[0046] The working principle of this utility model of a secondary self-emergency anti-fall beam device for bridges is as follows:

[0047] When the expansion joint 9 between the two beams 7 is within the expected range, the damper 3 plays the main role in damping. As the damper 3 expands and contracts, the bolt 6-6 can slide freely along the length of the long hole 6-4-1 to achieve the fitting effect.

[0048] When the expansion joint 9 changes beyond the expected value, the damper 3 is damaged due to excessive force. At this time, the steel strand 6-1, the end connecting block 6-2, the third connecting ring 6-3, the ear plate 6-4 and the square base 6-5 form a secondary emergency anti-fall measure. The steel strand 6-1 pulls the two beams 7 to prevent the expansion joint 9 from continuing to expand and to prevent the beams 7 from falling.

[0049] Specific implementation method four: Combination Figures 1 to 13 This embodiment describes the method for predicting the adaptation of secondary self-emergency anti-fall beams for bridges. This method involves determining the sliding displacement of the steel strand 6 in the adapted secondary self-emergency anti-fall beam device by obtaining the 95% guaranteed probability deformation of bridge displacement values ​​of the same type and length from earthquake damage survey data, the deformation limit length of expansion joints, and the maximum value of beam deformation calculated during rare earthquakes.

[0050] In this embodiment, the three important basic data in the bridge secondary self-emergency anti-fall beam adaptation prediction method are the 95% guaranteed probability deformation of the displacement values ​​of bridges of the same type and length in the earthquake damage survey data, the expansion joint deformation limit length, and the maximum value of the beam deformation calculated in a rare earthquake. The 95% guaranteed probability deformation of the displacement values ​​of bridges of the same type and length and the maximum value of the beam deformation calculated in a rare earthquake need to be calculated separately. The expansion joint deformation limit length is directly obtained from existing design data and actual bridge engineering. By comparing the three important basic data, the maximum value among them is the sliding displacement of the bridge secondary self-emergency anti-fall beam device. When the bridge secondary self-emergency anti-fall beam device includes steel strand 6, the maximum value among the 95% guaranteed probability deformation, the expansion joint deformation limit length, and the beam deformation calculated in a rare earthquake is the maximum value of the movement of steel strand 6.

[0051] Among the three important basic data in this implementation method, the process of obtaining the 95% guaranteed probability deformation of the displacement values ​​of bridges of the same type and length in the earthquake damage survey data is as follows: the design displacement of the steel strand 6 in the secondary self-emergency anti-fall beam device of the bridge is denoted as S. F S F Ensure that the allowable shear deformation of steel strand 6 is ≤ S. F ≤C F S E ;

[0052] S1. The maximum allowable shear deformation of steel strand 6 is taken as γ = 2, that is, the minimum movement of the secondary self-emergency anti-fall beam device for bridges is 2H, where H is the total thickness of the metal rubber gaskets 6-7 in steel strand 6, i.e., S F ≥2H;

[0053] S2, the support length of beam 7 is denoted as S. E S E =50+L / 100;

[0054] S11, the calculated span of beam 7 is denoted as L. When the spans of adjacent beams 7 are different, the calculation should be performed according to the case of the longer span.

[0055] S3. The design mobility coefficient of the secondary self-emergency anti-falling beam device for bridges is denoted as C. F C F The value range of S is 0.75 to 1. E When a large displacement or change may cause difficulties in maintenance and affect the support function, it can be less than 0.75;

[0056] Among the three important basic data in this implementation method, the process of obtaining the maximum value of beam deformation for rare earthquake verification is to take the allowable design tension of the cable, i.e., the total yield tension of the cable, and denote the total yield tension of the cable as P. y By comparing with the existing anti-fall beam parameter table, P is obtained. y Value, or through formula P y ≥H F / n=P, therefore P y Value, according to P y The value determines the type and number of the corresponding bridge secondary self-emergency anti-fall beam devices;

[0057] S1. The design seismic force in the secondary self-emergency anti-fall beam device for bridges is denoted as H. F H F =KR d ;

[0058] S11. The design seismic action coefficient is denoted as K. When the basic seismic intensity is ≤8 degrees, it is taken as 1.0; when the basic seismic intensity is ≥9 degrees, it is taken as 1.5.

[0059] S12, the vertical reaction force of the support is denoted as R. d R d The gravity of the beam is obtained through finite element analysis of the beam under gravity. When used for simply supported beam bridges, if the weights of the beams on both sides of the pier are different, the larger value of the two values ​​is taken.

[0060] S2. The number of secondary self-emergency anti-fall beam devices used in single-span bridges is denoted as n;

[0061] S3, the design seismic load borne by each cable is denoted as P.

[0062] In this embodiment, the secondary self-emergency anti-fall beam damping device for bridges includes a first hinge seat 1, a first connecting ring 2, a damper 3, a second connecting ring 4, a second hinge seat 5, and a steel strand 6. The first hinge seat 1 is hinged to one end of the first connecting ring 2, and the other end of the first connecting ring 2 is provided with one end of the damper 3. The other end of the damper 3 is provided with one end of the second connecting ring 4, and the other end of the second connecting ring 4 is hinged to the second hinge seat 5. One end of the steel strand 6 passes through the second connecting ring 4 and is provided on the damper 3. The steel strand 6 includes a steel strand 6-1, a third connecting ring 6-3, and a square base 6-5. The steel strand 6-1 has a bolt 6-6, two end connecting blocks 6-2, and two lugs 6-4. One end of the steel strand 6-1 is provided with one of the two end connecting blocks 6-2, and the other end of the steel strand 6-1 is provided with the other end connecting block 6-2. One end connecting block 6-2 is provided on the damper 3, and the other end connecting block 6-2 is provided on one end of the third connecting ring 6-3. The other end of the third connecting ring 6-3 is located between the two lugs 6-4. Each of the two lugs 6-4 has a long hole 6-4-1 machined on it. The bolt 6-6 passes through the third connecting ring 6-4. Inside the -3 and two elongated holes 6-4-1, two lugs 6-4 are vertically arranged side by side on the upper end of the square base 6-5. The steel strand 6-1 passes through the second connecting ring 4 and the damper 3. The end connecting block 6-2 is set on the damper 3. Positioning holes are machined at the four corners of the square base 6-5. The steel strand 6-1, the third connecting ring 6-3, and the two end connecting blocks 6-2 are coaxially arranged. A metal rubber gasket 6-7 is set at both ends of the inner wall of each elongated hole 6-4-1. The metal rubber gasket 6-7 has variable stiffness characteristics. Its initial stiffness is small and will not significantly affect the energy dissipation of the damper 3. When the displacement of the damper 3 approaches the extreme... When the displacement is limited, the stiffness of the metal rubber pad 6-7 increases sharply, which can also effectively limit the movement of the damper 3, thereby solving the problem of the damper 3 being damaged due to reaching the displacement limit, so that the damper 3 can continue to play an energy dissipation role for the structure. Moreover, the metal rubber pad 6-7 in this embodiment itself has a certain degree of recoverability and energy dissipation function, and has a secondary energy dissipation function. Compared with the traditional liquid viscous damper, the damper in this embodiment has a stronger energy dissipation capacity under low-speed pulses. The outer surface of the steel strand 6-1 is coated with plastic, and the plastic coating has good corrosion resistance, which can effectively protect the steel strand 6-1 from corrosion.

[0063] When the damper 3 expands or contracts, it pulls the steel strand 6-1 to move. The steel strand 6-1 pulls the third connecting ring 6-3, causing the bolt 6-6 to slide in the elongated hole 6-4-1. This allows the steel strand 6 to move accordingly with the change in the damper 3, ensuring that the normal function of the damper 3 is not affected, and also providing secondary anti-fall protection when the damper 3 fails.

[0064] When the damper 3 fails to function, the steel strand 6-1 comes into play. One end of the steel strand 6-1 is fixed to the damper 3, and the other end of the steel strand 6-1 is fixed to the third connecting ring 6-3. This is equivalent to the two ends of the steel strand 6-1 being fixed to the two beams 7 respectively, which plays a traction role on the two beams 7 that have enlarged the expansion joint 9, preventing the expansion joint 9 between the two beams 7 from continuing to expand and preventing the beams 7 from falling.

[0065] The steel strand 6-1 is coaxially arranged with the damper 3. When the beam 7 changes position, the stress position of the steel strand 6-1 is the same as that of the damper 3, so that the steel strand 6-1 achieves the maximum protective effect. Other unmentioned structures and connections in the secondary self-emergency anti-fall beam device for bridges are the same as those in specific implementation methods one, two, three, four, five, six, or seven.

[0066] There are several options for steel strand 6-1: when the additional damping ratio is 6%, it is 3 strands of steel strand 6-1; when the additional damping ratio is 2.5%, it is 7 strands of steel strand 6-1; when the additional damping ratio is 1.5%, it is 12 strands of steel strand 6-1.

Claims

1. A secondary self-emergency anti-falling beam device for bridges, characterized in that: It includes a first hinge seat (1), a first connecting ring (2), a damper (3), a second connecting ring (4), a second hinge seat (5), and a steel strand (6). The first hinge seat (1) and the second hinge seat (5) are arranged side by side. One end of the first connecting ring (2) is hinged to the first hinge seat (1), and the other end of the first connecting ring (2) is connected to one end of the damper (3). The other end of the damper (3) is set on one end of the second connecting ring (4), and the other end of the second connecting ring (4) is hinged to the second hinge seat (5). One end of the steel strand (6) is set on the damper (3), and the other end of the steel strand (6) passes through the second connecting ring (4) and is connected to the beam (7). The steel strand (6) includes a steel strand (6-1), a third connecting ring (6-3), a square base (6-5), a bolt (6-6), two end connecting blocks (6-2), and two lugs (6-4). The steel strand (6-1), the third connecting ring (6-3), and the two end connecting blocks (6-2) are coaxially arranged. The two end connecting blocks (6-2) are respectively arranged on the damper (3) and the third connecting ring (6-3). The two lugs (6-4) are arranged vertically side by side on the square base (6-5). The steel strand (6-1) passes between the second connecting ring (4) and the damper (3). One end of the steel strand (6-1) passes through one of the two end connecting blocks (6-2). The end connecting block (6-2) is connected to the damper (3). The other end of the steel strand (6-1) is connected to one end of the third connecting ring (6-3) through the other end connecting block (6-2) of the two end connecting blocks (6-2). The other end of the third connecting ring (6-3) is set between two lugs (6-4). Each lug (6-4) has a long hole (6-4-1) processed along its length. The bolt (6-6) is passed through the third connecting ring (6-3). The two ends of the bolt (6-6) are respectively slidably engaged with the two long holes (6-4-1). A metal rubber gasket (6-7) is respectively provided on the inner wall of each end of the long hole (6-4-1).

2. The secondary self-emergency anti-falling beam device for bridges according to claim 1, characterized in that: The damper (3) includes a piston rod (3-1), a piston (3-2), an upper end cover (3-3), a lower end cover (3-4), a connecting cylinder (3-5), and a cylinder (3-6). One end of the cylinder (3-6) is coaxially fitted with one end of the connecting cylinder (3-5). The upper end cover (3-3) and the lower end cover (3-4) are respectively located at both ends of the cylinder (3-6). One end of the piston rod (3-1) is located on the first connecting ring (2). The other end of the piston rod (3-1) passes between the upper end cover (3-3) and the lower end cover (3-4) in sequence. The piston (3-2) is located inside the cylinder (3-6) and is fitted onto the piston rod (3-1). One end of the steel strand (6-1) passes through the connecting cylinder (3-5). The other end of the piston rod (3-1) is connected to one of the two end connecting blocks (6-2).

3. The secondary self-emergency anti-falling beam device for bridges according to claim 1 or 2, characterized in that: The first hinge seat (1) and the second hinge seat (5) are both square bases. A positioning hole is machined at each of the four corners of the first hinge seat (1) and the four corners of the second hinge seat (5). Positioning holes are machined at the four corners of the square base (6-5).

4. The secondary self-emergency anti-falling beam device for bridges according to claim 3, characterized in that: The second connecting ring (4) is cylindrical in shape, and one end of the second connecting ring (4) is machined with a blind hole for connecting with the end connecting block (6-2).

5. A secondary self-emergency anti-falling beam device for bridges, characterized in that: The structure includes a first hinge seat (1), a first connecting ring (2), a damper (3), a second connecting ring (4), a second hinge seat (5), and a steel strand mechanism (10). The first hinge seat (1) and the second hinge seat (5) are arranged side by side. One end of the first connecting ring (2) is hinged to the first hinge seat (1), and the other end of the first connecting ring (2) is connected to one end of the damper (3). The other end of the damper (3) is located on one end of the second connecting ring (4), and the other end of the second connecting ring (4) is connected to... The second hinge seat (5) is hinged together, and the steel strand mechanism (10) is set between the damper (3) and the beam (7). The steel strand mechanism (10) includes a steel strand body (10-1), an anchor (10-2) and a fixed cone (10-3). One end of the steel strand body (10-1) passes through the damper (3) and is connected to the first connecting ring (2). The other end of the steel strand body (10-1) is connected to the beam (7) in sequence through the anchor (10-2) and the fixed cone (10-3).

6. The secondary self-emergency anti-falling beam device for bridges according to claim 5, characterized in that: The fixed cone block (10-3) is a metal rubber block. The fixed cone block (10-3) includes a hemispherical end cap (10-3-1), a conical frustum (10-3-2), and a bottom frustum (10-3-3). The hemispherical end cap (10-3-1), the conical frustum (10-3-2), and the bottom frustum (10-3-3) are coaxially arranged. One end of the bottom frustum (10-3-3) is connected to the main body of the steel strand (10-1), and the other end of the bottom frustum (10-3-3) is fixedly connected to the conical frustum (10-3-2). The hemispherical end cap (10-3-1) is fixedly connected to the conical frustum (10-3-2).

7. The secondary self-emergency anti-fall beam device for bridges according to claim 5 or 6, characterized in that: The damper (3) includes a piston rod (3-1), a piston (3-2), an upper end cover (3-3), a lower end cover (3-4), a connecting cylinder (3-5), and a cylinder (3-6). One end of the cylinder (3-6) is coaxially fitted with one end of the connecting cylinder (3-5). The upper end cover (3-3) and the lower end cover (3-4) are respectively located at both ends of the cylinder (3-6). One end of the piston rod (3-1) is located on the first connecting ring (2). The other end of the piston rod (3-1) passes between the upper end cover (3-3) and the lower end cover (3-4) in sequence. The piston (3-2) is located inside the cylinder (3-6) and is fitted on the piston rod (3-1). The main body of the steel strand (10-1) passes through the connecting cylinder (3-5).

8. A secondary self-emergency anti-falling beam device for bridges, characterized in that: The device includes a first hinge seat (1), a first connecting ring (2), and a steel strand (6). The first hinge seat (1) is hinged to one end of the first connecting ring (2), and the other end of the first connecting ring (2) is provided with a steel strand (6). The steel strand (6) includes a steel strand (6-1), a third connecting ring (6-3), a square base (6-5), a bolt (6-6), two end connecting blocks (6-2), and two lugs (6-4). The steel strand (6-1), the third connecting ring (6-3), and the two end connecting blocks (6-2) are coaxially arranged. The two end connecting blocks (6-2) are respectively arranged on the damper (3) and the third connecting ring (6-3). The two lugs (6-4) are arranged vertically side by side on the square base (6-5). The steel strand (6-1) passes through the second connecting ring (4) and the damper (6-5). Between the dampers (3), one end of the steel strand (6-1) is connected to the damper (3) through one of the two end connecting blocks (6-2), and the other end of the steel strand (6-1) is connected to one end of the third connecting ring (6-3) through the other end connecting block (6-2). The other end of the third connecting ring (6-3) is located between two lugs (6-4). Each lug (6-4) has a long hole (6-4-1) machined along its length. A bolt (6-6) passes through the third connecting ring (6-3). The two ends of the bolt (6-6) are slidably engaged with the two long holes (6-4-1) respectively. A metal rubber gasket (6-7) is provided on the inner wall of each end of the long hole (6-4-1).

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