Self-resetting device for limiting beam in transverse bridge direction and preventing beam from falling in longitudinal bridge direction and manufacturing method of self-resetting device

Abstract

The invention discloses a self-resetting device capable of limiting in the transverse bridge direction and preventing a beam from falling in the longitudinal bridge direction and a manufacturing method. The self-resetting device comprises a first connecting structure, a second connecting structure and an energy consumption self-resetting assembly. The first connecting structure comprises an upper bottom plate; the second connecting structure comprises a lower bottom plate, two oppositely-arranged L-shaped steel plates are fixedly connected to the upper portion of the lower bottom plate, and sliding grooves are formed in the opposite sides of the two L-shaped steel plates. The energy consumption self-resetting assembly comprises a round rod, the two ends of the round rod are fixedly connected with steel balls respectively, the round rod is sleeved with an inverted-T-shaped sliding block, the inverted-T-shaped sliding block is in sliding connection with the round rod, the round rod is fixedly connected with two square steel plates, and a spring is arranged between each square steel plate and the inverted-T-shaped sliding block. The round rod between the steel ball and the square steel plate is slidably connected into the sliding groove of the L-shaped steel plate. The self-resetting device can effectively solve the problem of temperature fatigue damage of the damper in the daily operation stage, and can provide self-resetting capacity while effectively controlling the relative displacement of the pier beam under the action of an earthquake.

Description

Technical Field

[0001] The invention relates to a self-resetting device for limiting a horizontal bridge direction and preventing a falling beam in a longitudinal bridge direction and a manufacturing method thereof, and belongs to the technical field of earthquake prevention and disaster reduction of bridge engineering. Background Art

[0002] As a key node in the modern transportation network, the performance of bridges in natural disasters such as earthquakes is directly related to public safety, economic losses and social impact. Under the action of earthquakes, the damage to bridge structures often leads to traffic interruptions, which in turn triggers a series of chain reactions such as rescue difficulties and material shortages. Therefore, improving the seismic performance of bridges has always been a research focus in the field of civil engineering.

[0003] Among the many bridge earthquake disasters, the beam drop phenomenon has attracted much attention due to its high frequency of occurrence, strong destructiveness, and difficulty in repair. Beam drops are mainly divided into two types: transverse and longitudinal. Among them, transverse beam drops are more effectively controlled by the traditional method of setting blocks on both sides of the top of the pier cap beam. However, in actual earthquakes, due to the unpredictability of the propagation direction of seismic waves and the complexity of the bridge structure response, the longitudinal beam drop problem is often more prominent, becoming a key factor restricting the improvement of bridge seismic performance.

[0004] In response to the problem of longitudinal bridge beam falling, the existing anti-falling beam construction measures are relatively scarce and have many shortcomings. On the one hand, the traditional anti-falling beam device mainly focuses on the transverse bridge limit, and does not consider the longitudinal bridge beam limit enough, making it difficult to effectively respond to the longitudinal bridge displacement requirements during earthquakes. On the other hand, even if some devices take the longitudinal bridge limit into consideration, they often ignore the impact of temperature changes on the limit device during daily operation, resulting in damage to the limit device due to high-cycle fatigue, reducing its service life and reliability.

[0005] In addition, the randomness of the structural response direction under earthquakes further exacerbates the limitations of traditional anti-falling beam devices. Traditional devices are often designed based on fixed limiting directions, which are difficult to adapt to the diversity of bridge structure response directions under earthquake waves, thus reducing their directional limiting and energy dissipation efficiency to a certain extent.

[0006] To sum up, in order to overcome the problems of low limiting efficiency of existing anti-falling beam devices, inability to adapt to temperature changes, and difficulty in continuously and effectively limiting the displacement of the beam body under multiple main shocks and aftershocks, it is urgent to develop a self-resetting device and manufacturing method for the transverse bridge limiting and longitudinal bridge anti-falling beam. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a self-resetting device for limiting the horizontal bridge direction and the longitudinal bridge direction to prevent the beam from falling, and a manufacturing method thereof. The present invention can solve the problems of low limiting efficiency of the existing anti-falling beam device, inability to adapt to temperature changes, and difficulty in continuously and effectively limiting the displacement of the beam body under multiple main shocks and aftershocks.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] On the one hand, the present invention provides a self-resetting device for a horizontal bridge limiting and a longitudinal bridge anti-falling beam, comprising a first connecting structure, a second connecting structure, and an energy-consuming self-resetting component arranged between the first connecting structure and the second connecting structure; the first connecting structure comprises an upper base plate; the second connecting structure comprises a lower base plate, and two oppositely arranged L-shaped steel plates are fixedly connected to the upper side of the lower base plate, and sliding grooves are provided on opposite sides of the two L-shaped steel plates; the energy-consuming self-resetting component comprises a round rod, and steel balls are fixedly connected to the two ends of the round rod respectively, and an inverted T-shaped outer sleeve of the round rod is provided. The slider is slidingly connected to the round rod, and the round rod is fixedly connected to two square steel plates, a spring is arranged between each of the square steel plates and the inverted T-shaped slider, and the round rod between the steel ball and the square steel plate is slidingly connected in the slide groove of the L-shaped steel plate; the upper end of the inverted T-shaped slider is connected to a rectangular short column, and a lower rectangular steel plate is fixedly connected above the rectangular short column, and a U-shaped damper is fixedly connected above the lower rectangular steel plate, and an upper rectangular steel plate is fixedly connected above the U-shaped damper, and the upper rectangular steel plate is fixedly connected to the upper bottom plate.

[0010] In one embodiment of the present invention, two L-shaped vertical plates are fixedly connected above the upper base plate, the two L-shaped vertical plates are arranged opposite to each other, and a plurality of reserved bolt holes are provided on opposite sides of the two L-shaped vertical plates; the two L-shaped vertical plates are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by a first bolt; the upper base plate and the L-shaped vertical plates are fixedly connected by a plurality of bolts and nuts.

[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.

[0012] In one embodiment of the present invention, the spring is sleeved on the outer circumference of the round rod, one end of the spring is fixedly connected to the square steel plate, and the other end is fixedly connected to the inverted T-shaped slider, and there is a distance between the square steel plate and the steel ball.

[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 rectangular short column is inserted into the slot of the inverted T-shaped slider and is fixedly connected to the inverted T-shaped slider.

[0014] In one embodiment of the present invention, the cross-sectional area of ​​the steel sphere and the cross-sectional area of ​​the square steel plate are both larger than the cross-sectional area of ​​the slide groove of the L-shaped steel plate.

[0015] In one embodiment of the present invention, the round rod is fixedly connected to the steel ball by welding, the square steel plate is fixedly connected to the round rod by welding, and the cuboid short column is fixedly connected to the lower rectangular steel plate by welding.

[0016] In one embodiment of the present invention, the round rod is a high-strength round rod, and the spring is a high-rigidity spring; the lower rectangular steel plate and the upper rectangular steel plate are fixedly connected to the U-shaped damper by a second bolt, and the second bolt is a set of high-strength bolt connection pairs, including studs, nuts and gaskets.

[0017] In one embodiment of the present invention, the bottom of both sides of the slide groove of the L-shaped steel plate are provided with lower notches, and the lower notches are used to lock the round rod;

[0018] When the bridge is in daily service, the round rod is located in the middle of the slide groove of the L-shaped steel plate; the two square steel plates welded on the round rod are respectively separated by a reserved distance from the steel balls at the ends of the round rod. When the bridge is deformed due to temperature changes, it will drive the inverted T-shaped slider to slide. At this time, the springs on both sides of the inverted T-shaped slider are pulled on one side and compressed on the other side, and drive the round rod to slide along the longitudinal direction of the bridge to adapt to the deformation of the bridge caused by temperature changes.

[0019] Under the action of an earthquake, due to the earthquake force in the transverse direction, the round rod slides in the transverse direction into the edge recess of the L-shaped steel plate slide slot and is locked; under the earthquake force in the longitudinal direction, the main beam drives the inverted T-shaped slider to slide through the first connecting structure. At this time, the springs on both sides of the inverted T-shaped slider are tensioned on one side and compressed on the other side, and are always in the elastic range, driving the round rod to slide in the longitudinal direction at the same time; when the main beam has a large displacement in the longitudinal direction, the square steel plate welded to the round rod contacts the L-shaped steel plate, and the U-shaped damper deforms to dissipate the earthquake energy; in addition, one of the two springs that are always in the elastic deformation range is tensioned and the other is compressed, and the elastic restoring force provided can restore the pier and beam to their initial positions.

[0020] On the other hand, the present invention provides a method for manufacturing a self-resetting device for a horizontal bridge limiting longitudinal bridge anti-falling beam, using the self-resetting device for a horizontal bridge limiting longitudinal bridge anti-falling beam, the manufacturing method comprises the following steps:

[0021] 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;

[0022] Step S2, installing the first connection structure, fixing the two L-shaped vertical plates to the cross beam between the main beams by means of first bolts, and fixing the upper base plate to the L-shaped vertical plates by means of bolts and nuts;

[0023] Step S3, installing the energy-consuming self-resetting component, after the round rod passes through the spring, the inverted T-shaped slider, and the spring in sequence, while the two springs maintain their original length, weld two square steel plates on the round rod, and weld the two ends of the two springs to the inverted T-shaped slider and the square steel plate respectively; then, after the two ends of the round rod pass through the slide grooves of the two L-shaped steel plates respectively, weld a steel ball to the end of the round rod; after the rectangular short column is inserted into the slot of the inverted T-shaped slider, the lower end of the U-shaped damper is connected to the lower rectangular steel plate by a second bolt, and the upper end of the U-shaped damper is connected to the upper rectangular steel plate by a second bolt; the upper rectangular steel plate is connected to the upper bottom plate of the first connecting structure by welding, and the L-shaped steel plate is connected to the lower bottom plate of the second connecting structure by welding;

[0024] Step S4: Install the second connection structure to connect and fix the lower base plate to the cap beam via chemical anchor bolts.

[0025] The present invention has the following beneficial effects:

[0026] The present invention provides a self-resetting device and manufacturing method for limiting the horizontal bridge and preventing the beam from falling in the longitudinal bridge direction. When the beam body is deformed in the longitudinal bridge direction due to temperature changes, the reserved distance between the square steel plate welded on the round rod and the L-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 lateral displacement of the main beam reaches a certain degree, the round rod will fall into the edge recess of the L-shaped steel plate slide and lock, thereby limiting the horizontal movement of the beam body; when the longitudinal displacement of the pier beam is large, the sliding of the inverted T-shaped slider will cause the spring to deform and drive the round rod to move at the same time; when the square steel plates welded on both sides of the round rod are tightly attached to the L-shaped steel plate, the U-shaped damper deforms to dissipate the seismic energy, which can effectively reduce the earthquake damage to the structure. 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 the beam from falling and damage. In addition, because the upper and lower ends of the U-shaped damper are fixed by bolts, it is easy to replace after the earthquake.

[0027] To sum up, the present invention provides a self-resetting device and a manufacturing method for limiting the beam in the transverse direction and preventing the beam from falling in the longitudinal direction, which can not only significantly improve the limiting efficiency of the beam in the longitudinal direction and effectively prevent the occurrence of beam falling disasters, but also avoid high-cycle fatigue damage of the limiting device caused by temperature effects. At the same time, it can efficiently dissipate seismic energy under the action of an earthquake and realize the self-resetting function, thereby improving the overall seismic resistance and safety of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the self-resetting device provided by the present invention.

[0030] Figure 2 This is a front view of a first connecting structure provided by the present invention.

[0031] Figure 3 This is a front view of a second connection structure provided by the present invention.

[0032] Figure 4 A front view of the energy-consuming self-resetting component provided by the present invention.

[0033] Figure 5 A schematic diagram of the disassembly of the energy-consuming self-resetting component provided by the present invention.

[0034] In the figure: 1. L-shaped vertical plate; 2. first bolt; 3. nut; 4. upper base plate; 5. L-shaped steel plate; 6. round rod; 7. square steel plate; 8. spring; 9. inverted T-shaped slider; 10. rectangular upper steel plate; 11. rectangular lower steel plate; 12. U-shaped damper; 13. second bolt; 14. rectangular short column; 15. chemical anchor bolt; 16. lower base plate. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The present invention provides a self-resetting device for limiting the transverse bridge direction and preventing the longitudinal bridge direction from falling off the beam. The device can effectively solve the problem of temperature fatigue damage of the damper in the daily operation stage, and can effectively control the relative displacement of the pier and beam under the action of an earthquake while providing self-resetting capability.

[0039] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides a self-resetting device for a transverse bridge limiting and longitudinal bridge anti-drop beam, comprising a first connecting structure, a second connecting structure, and an energy-consuming self-resetting component arranged between the first connecting structure and the second connecting structure.

[0040] In some embodiments, the first connection structure includes an upper base plate 4, and two L-shaped vertical plates 1 are fixedly connected above the upper base plate 4. The two L-shaped vertical 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 vertical plates 1; the two L-shaped vertical plates 1 are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by first bolts 2.

[0041] In this embodiment, a main beam cross beam is inserted between two L-shaped vertical plates 1 of the first connection structure and fixedly connected by first bolts 2 .

[0042] Furthermore, the upper base plate 4 and the L-shaped vertical plate 1 are fixedly connected by a plurality of bolts and nuts 3 .

[0043] In some embodiments, the second connection structure includes a lower base plate 16, which is fixedly connected to the cap beam via a plurality of chemical anchors 15, and two oppositely arranged L-shaped steel plates 5 are fixedly connected above the lower base plate 16, and sliding grooves are provided on opposite sides of the two L-shaped steel plates 5.

[0044] In this embodiment, the lower base plate 16 of the second connection structure is connected to the cap beam via chemical anchor bolts 15 , and two oppositely arranged L-shaped steel plates 5 are fixedly connected to the upper side of the lower base plate 16 via welding.

[0045] In some embodiments, the energy-consuming self-resetting component includes a round rod 6, both ends of which are fixedly connected with steel balls, an inverted T-shaped slider 9 is provided on the outer sleeve of the round rod 6, and the inverted T-shaped slider 9 is slidably connected to the round rod 6. The round rod 6 is fixedly connected with two square steel plates 7, and a spring 8 is provided between each of the square steel plates 7 and the inverted T-shaped slider 9. The spring 8 is sleeved on the outer periphery of the round rod 6, one end of the spring 8 is fixedly connected to the square steel plate 7, and the other end is fixedly connected to the inverted T-shaped slider 9. There is a certain distance between the square steel plate 7 and the steel ball, and the round rod 6 between the steel ball and the square steel plate 7 is slidably connected in the sliding groove of the L-shaped steel plate 5.

[0046] Furthermore, the upper end of the inverted T-shaped slider 9 is connected to a rectangular short column 14, a lower rectangular steel plate 11 is fixedly connected above the rectangular short column 14, a U-shaped damper 12 is fixedly connected above the lower rectangular steel plate 11, an upper rectangular steel plate 10 is fixedly connected above the U-shaped damper 12, and the upper rectangular steel plate 10 is fixedly connected to the upper base plate 4.

[0047] Furthermore, a slot is provided at the upper end of the inverted T-shaped slider 9 , and the slot is a square hole. The rectangular short column 14 is inserted into the slot of the inverted T-shaped slider 9 and is fixedly connected to the inverted T-shaped slider 9 .

[0048] Furthermore, the cross-sectional area of ​​the steel ball and the cross-sectional area of ​​the square steel plate 7 are both larger than the cross-sectional area of ​​the slide groove of the L-shaped steel plate 5. With this design, the steel ball and the square steel plate 7 can limit the sliding of the round rod 6 in the slide groove of the L-shaped steel plate 5, thereby preventing the round rod 6 from escaping from the slide groove of the L-shaped steel plate 5.

[0049] Optionally, the round rod 6 is fixedly connected to the steel ball by welding, the square steel plate 7 is fixedly connected to the round rod 6 by welding, and the cuboid short column 14 is fixedly connected to the lower rectangular steel plate 11 by welding.

[0050] Further, the bottom of both sides of the chute of the L-shaped steel plate 5 is provided with a lower notch, and the lower notch is used to lock the round rod 6. When the round rod 6 slides transversely into the lower notch of the edge of the chute of the L-shaped steel plate 5, it is locked.

[0051] Optionally, the round rod 6 is a high-strength round rod, and the spring 8 is a high-rigidity spring.

[0052] Furthermore, the lower rectangular steel plate 11 and the upper rectangular steel plate 10 are fixedly connected to the U-shaped damper 12 via second bolts 13 , and the second bolts 13 are a set of high-strength bolt connection pairs, including studs, nuts and washers.

[0053] In this embodiment, the two ends of the round rod 6 of the energy dissipation self-reset component pass through the slide groove of the L-shaped steel plate 5 in the second connection structure, and steel balls are welded at the two ends of the round rod 6 to prevent the round rod 6 from being disengaged from the slide groove. The round rod 6 is welded with two square steel plates 7, and the round rod 6 between the two square steel plates 7 is provided with an inverted T-shaped slider 9. The two sides of the inverted T-shaped slider 9 are respectively provided with springs 8 between the two square steel plates 7, one end of the spring 8 is fixedly connected to the square steel plate 7, and the other end is fixedly connected to the inverted T-shaped slider 9. A certain distance is set between the square steel plate 7 and the steel ball to adapt to the expansion and contraction deformation caused by temperature changes under the normal service state of the bridge; the upper and lower ends of the U-shaped damper 12 are respectively connected to the upper rectangular steel plate 10 and the lower rectangular steel plate 11 by bolts, the upper rectangular steel plate 10 is fixedly connected to the upper bottom plate 4 of the first connection structure, and the lower rectangular steel plate 11 is connected to the rectangular short column 14 by welding, and the rectangular short column 14 can be inserted into the slot reserved on the upper part of the inverted T-shaped slider 9.

[0054] Among them, when the bridge is in daily service, the round rod 6 is located in the middle of the slide groove of the L-shaped steel plate 5; a certain distance is reserved between the two square steel plates 7 welded on the round rod 6 and the steel balls at the ends of the round rod 6. When the bridge is deformed due to temperature changes, it will drive the inverted T-shaped slider 9 to slide. At this time, the springs 8 on both sides of the inverted T-shaped slider 9 are pulled on one side and compressed on the other side, and drive the round rod 6 to slide along the longitudinal direction of the bridge to adapt to the deformation of the bridge caused by temperature changes;

[0055] Under the action of earthquake, due to the earthquake force in the transverse direction, the round rod 6 slides in the transverse direction into the lower edge notch of the L-shaped steel plate 5 slide slot and is locked; under the action of earthquake in the longitudinal direction, the main beam drives the inverted T-shaped slider 9 to slide through the first connecting structure. At this time, the springs 8 on both sides of the inverted T-shaped slider 9 are pulled on one side and compressed on the other side, and are always in the elastic range, and drive the round rod 6 to slide along the longitudinal direction; when the longitudinal displacement of the main beam is large, the square steel plate 7 welded to the round rod 6 contacts the L-shaped steel plate 5, and the U-shaped damper 12 deforms to dissipate the earthquake energy; in addition, one of the two springs 8 that are always in the elastic deformation range is pulled and the other is compressed, and the elastic restoring force provided can restore the pier and beam to the initial position. Therefore, the use of the self-resetting device provided by the present invention 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.

[0056] In addition, the present invention also provides a method for manufacturing a self-resetting device for a horizontal bridge direction limiting and a vertical bridge direction anti-drop beam, using the self-resetting device for a horizontal bridge direction limiting and a vertical bridge direction anti-drop beam, the manufacturing method comprises the following steps:

[0057] 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 15 are reserved in the cap beams;

[0058] Step S2, installing the first connection structure, fixing the two L-shaped vertical 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 vertical plates 1 by means of bolts and nuts 3;

[0059] Step S3, installing the energy-consuming self-resetting component, after the round rod 6 passes through the spring 8, the inverted T-shaped slider 9, and the spring 8 in sequence, while the two springs 8 maintain their original length, two square steel plates 7 are welded on the round rod 6, and the two ends of the two springs 8 are respectively welded to the inverted T-shaped slider 9 and the square steel plate 7; then, after the two ends of the round rod 6 pass through the slide grooves of the two L-shaped steel plates 5 respectively, a steel ball is welded to the end of the round rod 6; after the rectangular short column 14 is inserted into the slot of the inverted T-shaped slider 9, the lower end of the U-shaped damper 12 is connected to the lower rectangular steel plate 11 by the second bolt 13, and the upper end of the U-shaped damper 12 is connected to the upper rectangular steel plate 10 by the second bolt 13; the upper rectangular steel plate 10 is connected to the upper bottom plate 4 of the first connecting structure by welding, and the L-shaped steel plate 5 is connected to the lower bottom plate 16 of the second connecting structure by welding;

[0060] Step S4, installing the second connection structure, connecting and fixing the lower base plate 16 to the cap beam via the chemical anchor bolts 15.

[0061] Therefore, the present invention provides a self-resetting device and manufacturing method for limiting the horizontal bridge and preventing the beam from falling in the longitudinal bridge direction. When the beam body is deformed in the longitudinal bridge direction due to temperature changes, the distance reserved between the square steel plate welded on the round rod and the L-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 lateral displacement of the main beam reaches a certain degree, the round rod will fall into the edge recess of the L-shaped steel plate slide and lock, thereby limiting the horizontal movement of the beam body; when the longitudinal displacement of the pier beam is large, the sliding of the inverted T-shaped slider will cause the spring to deform and drive the round rod to move at the same time; when the square steel plates welded on both sides of the round rod are tightly attached to the L-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 fall damage.

[0062] In summary, the self-resetting device and manufacturing method for limiting the horizontal bridge direction and preventing the beam from falling in the longitudinal bridge direction provided by the present invention can not only significantly improve the limiting efficiency of the beam body in the longitudinal bridge direction and effectively prevent the occurrence of beam falling disasters, but also avoid the high-cycle fatigue damage of the limiting device caused by temperature effects. At the same time, it can efficiently dissipate seismic energy under the action of an earthquake and realize the self-resetting function, thereby improving the overall seismic performance and safety of the bridge structure. In addition, because the upper and lower ends of the U-shaped damper are fixed by bolt connection, it is easy to replace after the earthquake.

[0063] 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 device for limiting the horizontal bridge and preventing the falling beam in the longitudinal bridge direction, characterized in that: The invention comprises a first connection structure, a second connection structure, and an energy-consuming self-resetting component arranged between the first connection structure and the second connection structure; the first connection structure comprises an upper base plate; the second connection structure comprises a lower base plate, two L-shaped steel plates arranged opposite to each other are fixedly connected to the upper side of the lower base plate, and a slide groove is provided on the opposite side of the two L-shaped steel plates; the energy-consuming self-resetting component comprises a round rod, steel balls are fixedly connected to the two ends of the round rod, an inverted T-shaped slider is arranged on the outer sleeve of the round rod, and the inverted T-shaped slider slides with the round rod The round rod is fixedly connected with two square steel plates, a spring is arranged between each of the square steel plates and the inverted T-shaped slider, the round rod between the steel ball and the square steel plate is slidably connected in the slide groove of the L-shaped steel plate; the upper end of the inverted T-shaped slider is connected with a rectangular short column, the upper part of the rectangular short column is fixedly connected with a lower rectangular steel plate, the upper part of the lower rectangular steel plate is fixedly connected with a U-shaped damper, the upper part of the U-shaped damper is fixedly connected with an upper rectangular steel plate, and the upper rectangular steel plate is fixedly connected to the upper base plate.

2. The self-resetting device according to claim 1, characterized in that: Two L-shaped vertical plates are fixedly connected above the upper base plate, the two L-shaped vertical plates are arranged opposite to each other, and a plurality of reserved bolt holes are provided on opposite sides of the two L-shaped vertical plates; the two L-shaped vertical plates are respectively located on both sides of the cross beam, and are fixedly connected to the cross beam by a first bolt; the upper base plate and the L-shaped vertical plates are fixedly connected by a plurality of bolts and nuts.

3. The self-resetting device according to claim 2, characterized in that: The lower base plate is fixedly connected to the cap beam via a plurality of chemical anchor bolts.

4. The self-resetting device according to claim 3, characterized in that: The spring is sleeved on the outer circumference of the round rod, one end of the spring is fixedly connected to the square steel plate, and the other end is fixedly connected to the inverted T-shaped slider, and there is a distance between the square steel plate and the steel ball.

5. The self-resetting device according to claim 4, 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 rectangular short column is inserted into the slot of the inverted T-shaped slider and is fixedly connected to the inverted T-shaped slider.

6. The self-resetting device according to claim 5, characterized in that: The cross-sectional area of ​​the steel sphere and the cross-sectional area of ​​the square steel plate are both larger than the cross-sectional area of ​​the slide groove of the L-shaped steel plate.

7. The self-resetting device according to claim 6, characterized in that: The round rod is fixedly connected to the steel ball by welding, the square steel plate is fixedly connected to the round rod by welding, and the cuboid short column is fixedly connected to the lower rectangular steel plate by welding.

8. The self-resetting device according to claim 7, characterized in that: The round rod is a high-strength round rod, and the spring is a high-stiffness coefficient spring; the lower rectangular steel plate and the upper rectangular steel plate are both fixedly connected to the U-shaped damper through a second bolt, and the second bolt is a set of high-strength bolt connection pairs, including studs, nuts and washers.

9. The self-resetting device according to claim 8, characterized in that: The bottom of both sides of the slide groove of the L-shaped steel plate are provided with lower notches, and the lower notches are used to lock the round rod; When the bridge is in daily service, the round rod is located in the middle of the slide groove of the L-shaped steel plate; the two square steel plates welded on the round rod are respectively separated by a reserved distance from the steel balls at the ends of the round rod. When the bridge is deformed due to temperature changes, it will drive the inverted T-shaped slider to slide. At this time, the springs on both sides of the inverted T-shaped slider are pulled on one side and compressed on the other side, and drive the round rod to slide along the longitudinal direction of the bridge to adapt to the deformation of the bridge caused by temperature changes. Under the action of earthquake, due to the earthquake force in the transverse direction, the round rod slides in the transverse direction into the edge recess of the L-shaped steel plate slideway and is locked; under the action of earthquake in the longitudinal direction, the main beam drives the inverted T-shaped slider to slide through the first connection structure. At this time, the springs on both sides of the inverted T-shaped slider are pulled on one side and compressed on the other side, and are always in the elastic range, driving the round rod to slide in the longitudinal direction at the same time; when the main beam has a large displacement in the longitudinal direction, the square steel plate welded to the round rod contacts the L-shaped steel plate, and the U-shaped damper deforms to dissipate the earthquake energy; In addition, one of the two springs that are always in the elastic deformation range is under tension and the other is under compression, and the elastic restoring force provided can restore the pier and the beam to their initial positions.

10. A method for manufacturing a self-resetting device for limiting the horizontal bridge and preventing the vertical bridge from falling, characterized in that: A self-resetting device for limiting the horizontal bridge direction and preventing the longitudinal bridge direction from falling 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 structure, fixing the two L-shaped vertical plates to the cross beam between the main beams by means of first bolts, and fixing the upper base plate to the L-shaped vertical plates by means of bolts and nuts; Step S3, installing the energy-consuming self-resetting component, after the round rod passes through the spring, the inverted T-shaped slider, and the spring in sequence, while the two springs maintain their original length, weld two square steel plates on the round rod, and weld the two ends of the two springs to the inverted T-shaped slider and the square steel plate respectively; then, after the two ends of the round rod pass through the slide grooves of the two L-shaped steel plates respectively, weld a steel ball to the end of the round rod; after the rectangular short column is inserted into the slot of the inverted T-shaped slider, the lower end of the U-shaped damper is connected to the lower rectangular steel plate by a second bolt, and the upper end of the U-shaped damper is connected to the upper rectangular steel plate by a second bolt; the upper rectangular steel plate is connected to the upper bottom plate of the first connecting structure by welding, and the L-shaped steel plate is connected to the lower bottom plate of the second connecting structure by welding; Step S4: Install the second connection structure to connect and fix the lower base plate to the cap beam via chemical anchor bolts.

Images