Self-resetting anti-beam-falling device adapting to temperature change in longitudinal bridge direction and manufacturing method of self-resetting anti-beam-falling device

Abstract

The invention discloses a self-resetting anti-beam-falling device adapting to temperature changes in the longitudinal bridge direction and a manufacturing method, the device comprises a self-resetting assembly, the self-resetting assembly comprises a cylindrical sliding rail, and a shoe-shaped steel plate and an inverted-T-shaped sliding block are arranged on the outer side of the cylindrical sliding rail in a penetrating mode; a spring is arranged between the vertical plate of the boot-shaped steel plate and the stand column of the second connecting assembly. The upper end of the inverted-T-shaped sliding block is fixedly connected with the steel short column of the first connecting assembly. The boot-shaped steel plate is fixedly connected with a U-shaped damper, and the U-shaped damper is fixedly connected with a lower bottom plate of the second connecting assembly. When a beam body deforms in the longitudinal bridge direction due to temperature change, the reserved distance between the inverted-T-shaped sliding block and the vertical plates on the two sides of the boot-shaped steel plate can ensure that the U-shaped damper cannot generate high-cycle fatigue damage; earthquake energy can be dissipated through deformation of the U-shaped damper under the action of an earthquake, and earthquake damage to the structure is effectively reduced; when the longitudinal bridge displacement of the beam body is resisted, the elastic restoring force of the spring can enable the beam body to restore to the initial safe position, and beam falling damage is prevented.

Description

Technical Field

[0001] The invention relates to a self-resetting anti-falling beam device adapting to temperature changes in the longitudinal direction of the bridge and a manufacturing method thereof, belonging to the technical field of bridge engineering earthquake resistance. Background Art

[0003] Traditional anti-falling beam devices usually adopt the method of setting reinforced concrete limit blocks on the top of the pier or on both sides of the cap beam, in the hope of preventing the bridge beam from falling in the longitudinal direction during an earthquake. However, this device has obvious limitations in practical applications. Under the action of strong earthquakes, these limit blocks are often unable to effectively prevent the longitudinal displacement of the bridge, resulting in unsatisfactory anti-falling effect. In addition, earthquake activities are often accompanied by multiple strong aftershocks, and most existing anti-falling beam devices can only withstand the impact of a single strong earthquake and cannot continuously and effectively limit the displacement of the bridge during aftershocks. Once the device yields and is damaged in the initial earthquake, it will be difficult to cope with the subsequent aftershock threats.

[0004] In addition to the threat of earthquakes, temperature changes are also an important factor affecting the safety of bridge structures. In an environment with a large temperature difference, the bridge structure will expand and contract, resulting in longitudinal displacement of the bridge. However, existing anti-falling beam devices are often fixedly connected to the bridge structure and cannot reasonably consider and adapt to this deformation caused by temperature changes. This not only limits the normal displacement of the bridge in daily operation, but may also cause fatigue damage due to long-term unnecessary stress, thereby shortening the service life of the device and reducing its reliability. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a self-resetting anti-beam drop device and a manufacturing method that can adapt to temperature changes in the longitudinal direction of the bridge. The present invention can solve the problems that the existing anti-beam drop device cannot adapt to temperature changes, the device cannot continue to effectively limit the displacement of the beam body after multiple uses, and it is difficult to cope with frequent earthquakes.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] On the one hand, the present invention provides a self-resetting anti-falling beam device that can adapt to the temperature change in the longitudinal direction of the bridge, including a first connecting component, a second connecting component, and a self-resetting component arranged between the first connecting component and the second connecting component; the first connecting component includes an upper base plate; the second connecting component includes a lower base plate, and two oppositely arranged columns are fixedly connected to the upper side of the lower base plate; the self-resetting component includes a cylindrical slide rail, and the two ends of the cylindrical slide rail are respectively fixedly connected to the two columns of the second connecting component, and a boot-shaped steel plate and an inverted T-shaped slider are passed through the outer side of the cylindrical slide rail; the boot-shaped steel plate It includes a bottom plate and two vertical plates fixedly connected to both sides above the bottom plate, the cylindrical slide rail is passed through the two vertical plates of the boot-shaped steel plate, and the inverted T-shaped slider is located between the two vertical plates of the boot-shaped steel plate; a spring is provided between the vertical plate of the boot-shaped steel plate and the vertical column of the second connecting component; the inverted T-shaped slider is located above the bottom plate of the boot-shaped steel plate, and the upper end of the inverted T-shaped slider is fixedly connected to the steel short column of the first connecting component; U-shaped dampers are fixedly connected to both sides of the lower end of the bottom plate of the boot-shaped steel plate, and the lower part of the U-shaped damper is fixedly connected to the lower bottom plate of the second connecting component.

[0008] In one embodiment of the present invention, the spring is sleeved on the outer circumference of the cylindrical slide rail, one end of the spring is fixedly connected to the column, and the other end of the spring is fixedly connected to the vertical plate of the boot-shaped steel plate.

[0009] In one embodiment of the present invention, two L-shaped steel plates are fixedly connected to the top of the upper base plate, the two L-shaped steel plates are arranged opposite to each other, and a plurality of reserved bolt holes are provided on opposite sides of the two L-shaped steel plates; the two L-shaped steel plates are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by a first bolt; a steel short column is fixedly connected to the bottom of the upper base plate.

[0010] In one embodiment of the present invention, the upper base plate is fixedly connected to the L-shaped steel plate by a plurality of bolts and nuts; the upper base plate is fixedly connected to the steel short column by welding.

[0011] In one embodiment of the present invention, the lower base plate is fixedly connected to the cap beam via a plurality of chemical anchor bolts; and two oppositely arranged columns are fixedly connected to the upper side of the lower base plate via welding.

[0012] In one embodiment of the present invention, the two U-shaped dampers are opened facing each other and arranged symmetrically, and the upper and lower sides of one open end of the U-shaped damper are fixedly connected to the bottom plate of the boot-shaped steel plate and the lower bottom plate of the second connecting assembly by second bolts respectively.

[0013] In one embodiment of the present invention, a slot is provided at the upper end of the inverted T-shaped slider, and the slot is a square hole. The steel short column of the first connecting component is a rectangular structure, and the steel short column of the rectangular structure is inserted into the slot of the inverted T-shaped slider and fixedly connected to the inverted T-shaped slider.

[0014] In one embodiment of the present invention, a reserved distance allowing sliding is provided between the inverted T-shaped slider and the vertical plate of the shoe-shaped steel plate to accommodate the expansion and contraction deformation of the main beam caused by temperature changes under normal service conditions of the bridge;

[0015] Under the action of an earthquake, a relative displacement occurs between the pier and the beam, that is, a relative displacement occurs between the first connecting component and the second connecting component, so that the steel short column drives the inverted T-shaped slider to move together. When the sliding distance of the inverted T-shaped slider is less than the reserved distance, the boot-shaped steel plate and the two springs are not subjected to force, and the seismic energy is consumed by friction between the inverted T-shaped slider and the cylindrical slide rail; when the sliding distance of the inverted T-shaped slider is greater than or equal to the reserved distance, the boot-shaped steel plate, the steel short column and the inverted T-shaped slider form a force-bearing overall synchronous movement, and the U-shaped damper is deformed under force to dissipate the seismic energy. At the same time, one of the two springs is tensile and the other is compressed, and they are always in the elastic range. The spring and the U-shaped damper are deformed synergistically, and the elastic restoring force of the spring can restore the pier and the beam to their initial position; when the U-shaped damper is subjected to a large force and enters the plastic stage, it can consume seismic energy through its deformation.

[0016] In one embodiment of the present invention, the cylindrical slide rail is a high-strength cylindrical structure, and the spring is a high-rigidity spring; the first bolt and the second bolt are both a set of high-strength bolt connection pairs, including studs, nuts and washers.

[0017] On the other hand, the present invention provides a method for manufacturing a self-resetting anti-falling beam device that adapts to temperature changes in the longitudinal direction of the bridge, using the self-resetting anti-falling beam device that adapts to temperature changes in the longitudinal direction of the bridge, and the manufacturing method comprises the following steps:

[0018] Step S1: During on-site pouring, holes for installing first bolts are reserved in the cross beams between the main beams, and holes for installing chemical anchor bolts are reserved in the cap beams;

[0019] Step S2, installing the first connection assembly, fixing the two L-shaped steel plates to the cross beam between the main beams by means of first bolts, and fixing the upper base plate to the L-shaped steel plates by means of bolts and nuts;

[0020] Step S3, installing the self-reset assembly, after the high stiffness coefficient spring, the boot-shaped steel plate, the inverted T-shaped slider, and the spring are sequentially passed through the cylindrical slide rail, and the two ends of the cylindrical slide rail are connected between the two columns of the second connection assembly by welding; at the same time, the steel short column is inserted into the slot reserved on the upper part of the inverted T-shaped slider, and the upper end of the U-shaped damper is connected and fixed to the boot-shaped steel plate by the second bolt;

[0021] Step S4, installing the second connection assembly, connecting and fixing the lower base plate to the cap beam via chemical anchor bolts; and connecting and fixing the lower end of the U-shaped damper to the lower base plate via a second bolt.

[0022] The present invention has the following beneficial effects:

[0023] The present invention provides a self-resetting anti-beam drop device and a manufacturing method that can adapt to longitudinal temperature changes. When the beam body is deformed in the longitudinal direction due to temperature changes, the reserved distance set between the inverted T-shaped slider and the vertical plates on both sides of the boot-shaped steel plate can ensure that the U-shaped damper will not be damaged by high-cycle fatigue. Under the action of an earthquake, when the relative displacement between the pier beam exceeds the reserved distance between the inverted T-shaped slider and the vertical plates on both sides of the boot-shaped steel plate, the U-shaped damper deforms to dissipate seismic energy, which can effectively reduce structural earthquake damage. When resisting the longitudinal displacement of the beam body, the elastic restoring force of the spring can restore the beam body to a certain safe position to prevent beam drop damage. In addition, the present invention is connected by high-strength bolts, which is convenient to replace.

[0024] In summary, the present invention provides a self-resetting anti-beam drop device and a manufacturing method that can adapt to the temperature change in the longitudinal direction of the bridge. During the daily operation stage, the bridge can allow a certain longitudinal displacement in an environment with a large temperature difference, thereby effectively solving the problem of temperature fatigue damage to the damper; and when subjected to an earthquake impact, the device consumes seismic energy through the damper, and uses the elastic deformation of the spring to restore the beam body to its original position after the longitudinal displacement occurs, thereby effectively preventing the occurrence of a beam drop accident. In addition, because the upper and lower ends of the U-shaped damper are fixed by bolts, it is easy to replace after an earthquake. The self-resetting anti-beam drop device not only improves the safety of the bridge structure under earthquakes, but also extends the service life and reliability of the device, providing a strong guarantee for the long-term safe service of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1This is a schematic diagram of the three-dimensional structure of the self-resetting anti-falling beam device provided by the present invention.

[0027] Figure 2 A schematic structural diagram of the first connecting component provided by the present invention.

[0028] Figure 3 This is a schematic structural diagram of the second connecting component provided by the present invention.

[0029] Figure 4 This is a schematic structural diagram of the self-resetting assembly provided by the present invention.

[0030] Figure 5 This is a schematic diagram of the disassembly of the self-resetting component provided by the present invention.

[0031] In the figure: 1. L-shaped steel plate; 2. first bolt; 3. nut; 4. upper base plate; 5. steel short column; 6. inverted T-shaped slider; 7. boot-shaped steel plate; 8. cylindrical slide rail; 9. spring; 10. U-shaped damper; 11. second bolt; 12. steel column; 13. lower base plate; 14. chemical anchor bolt. DETAILED DESCRIPTION

[0032] 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 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.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The present invention provides a self-resetting anti-beam drop device that can adapt to temperature changes in the longitudinal direction of the bridge. The device can effectively solve the problem of temperature fatigue damage of the damper during daily operation, and can effectively control the relative displacement of the piers and beams under the action of an earthquake while providing self-resetting capability.

[0036] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides a self-resetting anti-falling beam device that can adapt to temperature changes in the longitudinal direction of the bridge, including a first connecting component, a second connecting component, and a self-resetting component arranged between the first connecting component and the second connecting component.

[0037] In some embodiments, the first connecting assembly includes an upper base plate 4, and two L-shaped steel plates 1 are fixedly connected to the upper side of the upper base plate 4. The two L-shaped steel plates 1 are arranged opposite to each other, and a plurality of reserved bolt holes are provided on opposite sides of the two L-shaped steel plates 1; the two L-shaped steel plates 1 are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by first bolts 2; a steel short column 5 is fixedly connected to the lower side of the upper base plate 4.

[0038] In this embodiment, a cross beam between main beams is inserted between two L-shaped steel plates 1 of the first connecting assembly and fixedly connected by first bolts 2 .

[0039] Furthermore, the upper base plate 4 is fixedly connected to the L-shaped steel plate 1 by a plurality of bolts and nuts 3; the upper base plate 4 is fixedly connected to the steel short column 5 by welding.

[0040] In some embodiments, the second connection assembly includes a lower base plate 13 , and the lower base plate 13 is fixedly connected to the cap beam via a plurality of chemical anchor bolts 14 . Two oppositely arranged columns 12 are fixedly connected to the upper side of the lower base plate 13 .

[0041] In this embodiment, the lower base plate 13 of the second connection assembly is fixedly connected to the cap beam via chemical anchor bolts 14 , and two oppositely arranged columns 12 are fixedly connected to the upper side of the lower base plate 13 via welding.

[0042] In some embodiments, the self-resetting component includes a cylindrical slide rail 8, the two ends of which are fixedly connected to the two columns 12 of the second connecting component respectively, and a shoe-shaped steel plate 7 and an inverted T-shaped slider 6 are inserted into the outer side of the cylindrical slide rail 8; the shoe-shaped steel plate 7 includes a bottom plate and two vertical plates fixedly connected to both sides above the bottom plate, the cylindrical slide rail 8 is inserted into the two vertical plates of the shoe-shaped steel plate 7, and the inverted T-shaped slider 6 is located between the two vertical plates of the shoe-shaped steel plate 7 and at a distance from the vertical plates; a spring 9 is provided between the vertical plate of the boot-shaped steel plate 7 and the column 12 of the second connecting component, the spring 9 is sleeved on the outer periphery of the cylindrical slide rail 8, one end of the spring 9 is fixedly connected to the column 12, and the other end is fixedly connected to the vertical plate of the boot-shaped steel plate 7; the inverted T-shaped slider 6 is located above the bottom plate of the boot-shaped steel plate 7, and the upper end of the inverted T-shaped slider 6 is fixedly connected to the steel short column 5 of the first connecting component.

[0043] Furthermore, U-shaped dampers 10 are fixedly connected to both sides of the lower end of the bottom plate of the boot-shaped steel plate 7, and the lower parts of the two U-shaped dampers 10 are fixedly connected to the lower bottom plate 13 of the second connecting assembly.

[0044] Furthermore, the two U-shaped dampers 10 are opened facing each other and arranged symmetrically, and the upper and lower sides of the open end of the U-shaped damper 10 are fixedly connected to the bottom plate of the shoe-shaped steel plate 7 and the lower bottom plate 13 of the second connecting assembly through second bolts 11 respectively.

[0045] Furthermore, a slot is provided at the upper end of the inverted T-shaped slider 6, and the slot is a square hole. The steel short column 5 of the first connecting component is a rectangular structure. The steel short column 5 of the rectangular structure is inserted into the slot of the inverted T-shaped slider 6 and is fixedly connected to the inverted T-shaped slider 6.

[0046] In this embodiment, the two ends of the cylindrical slide rail 8 of the self-resetting assembly are connected between the two columns 12 of the second connecting assembly by welding. The cylindrical slide rail 8 passes through the inverted T-shaped slider 6 and the shoe-shaped steel plate 7. The inverted T-shaped slider 6 is located between the two vertical plates of the shoe-shaped steel plate 7 and has a certain distance from the vertical plates to adapt to the expansion and contraction deformation of the main beam caused by temperature changes under the normal service state of the bridge; the cylindrical slide rail 8 passes through two springs 9, and the two ends of the spring 9 are fixedly connected to the vertical plates of the shoe-shaped steel plate 7 and the columns 12 of the second connecting assembly respectively.

[0047] Wherein, a reserved distance is provided between the inverted T-shaped slider 6 and the vertical plate of the boot-shaped steel plate 7 to allow sliding, so as to adapt to the expansion and contraction deformation of the main beam caused by temperature change under the normal service state of the bridge;

[0048] Under the action of earthquake, relative displacement occurs between the pier and beam, that is, relative displacement occurs between the first connecting component and the second connecting component, so that the steel short column 5 drives the inverted T-shaped slider 6 to move together. When the sliding distance of the inverted T-shaped slider 6 is less than the reserved distance, the boot-shaped steel plate 7 and the two springs 9 are not stressed, and the inverted T-shaped slider 6 and the cylindrical slide rail 8 consume the earthquake energy through friction; when the sliding distance of the inverted T-shaped slider 6 is greater than or equal to the reserved distance, the boot-shaped steel plate 7 and the steel short column 5 and the inverted T-shaped slider 6 form a force-bearing overall synchronous movement, and the U-shaped damper 10 is stressed and deformed to dissipate the earthquake energy. At the same time, one of the two springs 9 is pulled and the other is compressed, and they are always in the elastic range. The spring 9 and the U-shaped damper 10 are deformed in coordination, and the elastic restoring force of the spring 9 can restore the pier and the beam to the initial position; when the U-shaped damper 10 is subjected to a large force and enters the plastic stage, it can consume the earthquake energy through its deformation. Therefore, the use of the self-resetting anti-falling beam device is conducive to controlling the relative displacement between the pier and the beam under the action of earthquake, reducing the risk of falling beams, and improving the reset ability.

[0049] Optionally, the reserved distance between the inverted T-shaped sliding block 6 and the vertical plate of the shoe-shaped steel plate 7 can be 50 mm.

[0050] Optionally, the cylindrical slide rail 8 is a high-strength cylindrical structure, and the spring 8 is a high-rigidity spring.

[0051] Optionally, the first bolt 2 and the second bolt 13 are both a set of high-strength bolt connection pairs, including studs, nuts and washers.

[0052] In addition, the present invention also provides a method for manufacturing a self-resetting anti-falling beam device that adapts to temperature changes in the longitudinal direction of the bridge, using the self-resetting anti-falling beam device that adapts to temperature changes in the longitudinal direction of the bridge, and the manufacturing method comprises the following steps:

[0053] Step S1, during on-site pouring, holes for installing the first bolts 2 are reserved in the cross beams between the main beams, and holes for installing the chemical anchor bolts 14 are reserved in the cap beams;

[0054] Step S2, installing the first connection assembly, fixing the two L-shaped steel plates 1 to the cross beam between the main beams by means of the first bolts 2, and fixing the upper base plate 4 to the L-shaped steel plates 1 by means of bolts and nuts 3;

[0055] Step S3, installing the self-reset assembly, after the high stiffness coefficient spring 9, the shoe-shaped steel plate 7, the inverted T-shaped slider 6, and the spring 9 are sequentially passed through the cylindrical slide rail 8, the two ends of the cylindrical slide rail 8 are connected between the two columns 12 of the second connecting assembly by welding; at the same time, the steel short column 5 is inserted into the slot reserved on the upper part of the inverted T-shaped slider 6, and the upper end of the U-shaped damper 10 is connected and fixed to the shoe-shaped steel plate 7 by the second bolt 11;

[0056] Step S4, installing the second connection assembly, connecting and fixing the lower base plate 13 to the cap beam via the chemical anchor bolts 14; and connecting and fixing the lower end of the U-shaped damper 10 to the lower base plate 13 via the second bolts 11.

[0057] Therefore, the present invention provides a self-resetting anti-beam drop device and a manufacturing method that can adapt to longitudinal temperature changes. When the beam body is deformed in the longitudinal direction due to temperature changes, the reserved distance set between the inverted T-shaped slider and the vertical plates on both sides of the boot-shaped steel plate can ensure that the U-shaped damper will not be damaged by high-cycle fatigue. Under the action of an earthquake, when the relative displacement between the pier beam exceeds the reserved distance between the inverted T-shaped slider and the vertical plates on both sides of the boot-shaped steel plate, the U-shaped damper deforms to dissipate seismic energy, which can effectively reduce structural earthquake damage. When resisting the longitudinal displacement of the beam body, the elastic restoring force of the spring can restore the beam body to a certain safe position to prevent beam drop damage. In addition, the present invention is connected by high-strength bolts, which is convenient to replace.

[0058] In summary, the present invention provides a self-resetting anti-beam drop device and a manufacturing method that can adapt to the temperature change in the longitudinal direction of the bridge. During the daily operation stage, the bridge can allow a certain longitudinal displacement in an environment with a large temperature difference, thereby effectively solving the problem of temperature fatigue damage to the damper; and when subjected to an earthquake impact, the device consumes seismic energy through the damper, and uses the elastic deformation of the spring to restore the beam body to its original position after the longitudinal displacement occurs, thereby effectively preventing the occurrence of a beam drop accident. In addition, because the upper and lower ends of the U-shaped damper are fixed by bolts, it is easy to replace after an earthquake. The self-resetting anti-beam drop device not only improves the safety of the bridge structure under earthquakes, but also extends the service life and reliability of the device, providing a strong guarantee for the long-term safe service of the bridge structure.

[0059] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A self-resetting anti-falling beam device that adapts to the temperature change in the longitudinal direction of the bridge, characterized in that: The invention comprises a first connecting component, a second connecting component, and a self-resetting component arranged between the first connecting component and the second connecting component; the first connecting component comprises an upper base plate; the second connecting component comprises a lower base plate, and two oppositely arranged columns are fixedly connected to the upper side of the lower base plate; the self-resetting component comprises a cylindrical slide rail, and the two ends of the cylindrical slide rail are respectively fixedly connected to the two columns of the second connecting component, and a boot-shaped steel plate and an inverted T-shaped slider are penetrated on the outer side of the cylindrical slide rail; the boot-shaped steel plate comprises a base plate and a base plate fixedly connected to the base plate Two vertical plates on both sides above, the cylindrical slide rail is passed through the two vertical plates of the boot-shaped steel plate, and the inverted T-shaped slider is located between the two vertical plates of the boot-shaped steel plate; a spring is provided between the vertical plates of the boot-shaped steel plate and the columns of the second connecting component; the inverted T-shaped slider is located above the bottom plate of the boot-shaped steel plate, and the upper end of the inverted T-shaped slider is fixedly connected to the steel short column of the first connecting component; U-shaped dampers are fixedly connected to both sides of the lower end of the bottom plate of the boot-shaped steel plate, and the lower part of the U-shaped damper is fixedly connected to the lower bottom plate of the second connecting component.

2. The self-resetting anti-falling beam device according to claim 1, characterized in that: The spring is sleeved on the outer circumference of the cylindrical slide rail, one end of the spring is fixedly connected to the column, and the other end is fixedly connected to the vertical plate of the boot-shaped steel plate.

3. The self-resetting anti-falling beam device according to claim 2, characterized in that: Two L-shaped steel plates are fixedly connected above the upper base plate, the two L-shaped steel plates are arranged opposite to each other, and a plurality of reserved bolt holes are provided on opposite sides of the two L-shaped steel plates; the two L-shaped steel plates are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by the first bolts; a steel short column is fixedly connected below the upper base plate.

4. The self-resetting anti-falling beam device according to claim 3, characterized in that: The upper base plate is fixedly connected to the L-shaped steel plate by a plurality of bolts and nuts; the upper base plate is fixedly connected to the steel short column by welding.

5. The self-resetting anti-falling beam device according to claim 4, characterized in that: The lower base plate is fixedly connected to the cap beam via a plurality of chemical anchor bolts; and two oppositely arranged upright columns are fixedly connected to the upper side of the lower base plate via welding.

6. The self-resetting anti-falling beam device according to claim 5, characterized in that: The two U-shaped dampers are opened facing each other and arranged symmetrically, and the upper and lower sides of one open end of the U-shaped damper are fixedly connected to the bottom plate of the boot-shaped steel plate and the lower bottom plate of the second connecting assembly through second bolts respectively.

7. The self-resetting anti-falling beam device according to claim 6, characterized in that: A slot is provided at the upper end of the inverted T-shaped slider, and the slot is a square hole. The steel short column of the first connecting component is a rectangular structure. The steel short column of the rectangular structure is inserted into the slot of the inverted T-shaped slider and is fixedly connected to the inverted T-shaped slider.

8. The self-resetting anti-falling beam device according to claim 7, characterized in that: A reserved distance allowing sliding is provided between the inverted T-shaped slider and the vertical plate of the boot-shaped steel plate to accommodate the expansion and contraction deformation of the main beam caused by temperature changes under normal service conditions of the bridge; Under the action of an earthquake, a relative displacement occurs between the pier and the beam, that is, a relative displacement occurs between the first connecting component and the second connecting component, so that the steel short column drives the inverted T-shaped slider to move together. When the sliding distance of the inverted T-shaped slider is less than the reserved distance, the boot-shaped steel plate and the two springs are not subjected to force, and the seismic energy is consumed by friction between the inverted T-shaped slider and the cylindrical slide rail; when the sliding distance of the inverted T-shaped slider is greater than or equal to the reserved distance, the boot-shaped steel plate, the steel short column and the inverted T-shaped slider form a force-bearing overall synchronous movement, and the U-shaped damper is deformed under force to dissipate the seismic energy. At the same time, one of the two springs is tensile and the other is compressed, and they are always in the elastic range. The spring and the U-shaped damper are deformed synergistically, and the elastic restoring force of the spring can restore the pier and the beam to their initial position; when the U-shaped damper is subjected to a large force and enters the plastic stage, it can consume seismic energy through its deformation.

9. The self-resetting anti-falling beam device according to claim 6, characterized in that: The cylindrical slide rail is a high-strength cylindrical structure, and the spring is a high-rigidity spring; the first bolt and the second bolt are both a set of high-strength bolt connection pairs, including studs, nuts and washers.

10. A method for manufacturing a self-resetting anti-falling beam device that adapts to longitudinal bridge temperature changes, characterized in that: A self-resetting anti-falling beam device adapted to longitudinal bridge temperature changes as described in any one of claims 1 to 9 is used, and the manufacturing method comprises the following steps: Step S1: During on-site pouring, holes for installing first bolts are reserved in the cross beams between the main beams, and holes for installing chemical anchor bolts are reserved in the cap beams; Step S2, installing the first connection assembly, fixing the two L-shaped steel plates to the cross beam between the main beams by means of first bolts, and fixing the upper base plate to the L-shaped steel plates by means of bolts and nuts; Step S3, installing the self-reset assembly, after the high stiffness coefficient spring, the boot-shaped steel plate, the inverted T-shaped slider, and the spring are sequentially passed through the cylindrical slide rail, and the two ends of the cylindrical slide rail are connected between the two columns of the second connection assembly by welding; at the same time, the steel short column is inserted into the slot reserved on the upper part of the inverted T-shaped slider, and the upper end of the U-shaped damper is connected and fixed to the boot-shaped steel plate by the second bolt; Step S4, installing the second connection assembly, connecting and fixing the lower base plate to the cap beam via chemical anchor bolts; and connecting and fixing the lower end of the U-shaped damper to the lower base plate via a second bolt.

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