A self-resetting device for limiting transverse bridge and preventing longitudinal bridge from falling and a manufacturing method thereof

Abstract

The application discloses a self-resetting device for limiting in the transverse direction of a bridge and preventing beam falling in the longitudinal direction of the bridge and a manufacturing method, which comprises a first connecting structure, a second connecting structure and an energy-consuming self-resetting component. The first connecting structure comprises an upper bottom plate. The second connecting structure comprises a lower bottom plate, and two oppositely arranged L-shaped steel plates are fixedly connected to the upper portion of the lower bottom plate. Sliding grooves are formed in the opposite sides of the two L-shaped steel plates. The energy-consuming self-resetting component comprises a round rod, the two ends of the round rod are fixedly connected with steel balls, a reverse T-shaped sliding block is arranged on the outer sleeve of the round rod, the reverse T-shaped sliding block is slidably connected with the round rod, two square steel plates are fixedly connected with the round rod, springs are arranged between each square steel plate and the reverse T-shaped sliding block, and the round rod between the steel ball and the square steel plate is slidably connected in the sliding groove of the L-shaped steel plate. The self-resetting device can effectively solve the temperature fatigue damage problem of a damper in a daily operation stage, can effectively control the relative displacement of a pier and a beam under the action of an earthquake and can provide self-resetting capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to a self-resetting device for limiting in the transverse direction and preventing beam falling in the longitudinal direction and a manufacturing method, belonging to the technical field of bridge engineering earthquake prevention and disaster reduction. BACKGROUND

[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 destruction of bridge structures often leads to traffic disruption, and further causes 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, beam falling is of great concern due to its high frequency, strong destructive nature and difficulty in repair. Beam falling is mainly divided into transverse and longitudinal directions. The transverse beam falling has been effectively controlled by the traditional method of setting blocks on both sides of the pier cap beam. However, due to the unpredictability of seismic wave propagation direction and the complexity of bridge structure response, the longitudinal beam falling problem is often more prominent and becomes a key factor restricting the improvement of bridge seismic performance.

[0004] For the problem of longitudinal beam falling, the existing anti-falling beam structural measures are relatively scarce and have many shortcomings. On the one hand, traditional anti-falling beam devices mainly focus on transverse limiting, and insufficient consideration is given to longitudinal beam limiting, making it difficult to effectively respond to the displacement demand in the longitudinal direction during earthquakes. On the other hand, even if some devices consider longitudinal limiting, they often ignore the impact of temperature changes during daily operation on the limiting device, resulting in damage to the limiting device due to high-cycle fatigue and reducing its service life and reliability.

[0005] In addition, the randomness of structural response direction under the action of earthquakes further exacerbates the limitations of traditional anti-falling beam devices. Traditional devices are often designed based on fixed limiting directions, making it difficult to adapt to the diversity of bridge structure response directions under the action of seismic waves, thereby reducing the efficiency of directional limiting and energy dissipation to some extent.

[0006] In summary, in order to overcome the problems of low limiting efficiency, inability to adapt to temperature changes, difficulty in continuously and effectively limiting beam displacement under the action of main shock and aftershocks, etc. of existing anti-falling beam devices, it is urgent to develop a self-resetting device for limiting in the transverse direction and preventing beam falling in the longitudinal direction and a manufacturing method. SUMMARY

[0007] To solve the above problems, the present application provides a self-resetting device for limiting in the transverse direction and preventing beam falling in the longitudinal direction and a manufacturing method, which can solve the problems of low limiting efficiency, inability to adapt to temperature changes, difficulty in continuously and effectively limiting beam displacement under the action of main shock and aftershocks, etc. of existing anti-falling beam devices.

[0008] To achieve the above object, the present application provides the following technical solutions.

[0009] In one aspect, the present application provides a self-resetting device for limiting transverse bridge and preventing beam from falling, comprising a first connecting structure, a second connecting structure, and a self-resetting energy dissipation component arranged between the first connecting structure and the second connecting structure; the first connecting structure comprises an upper bottom plate; the second connecting structure comprises a lower bottom plate, and two oppositely arranged L-shaped steel plates are fixedly connected above the lower bottom plate, and a sliding groove is formed on the opposite side of the two L-shaped steel plates; the self-resetting energy dissipation component comprises a round rod, two steel balls are fixedly connected at the two ends of the round rod, a reverse T-shaped sliding block is sleeved on the round rod, the reverse T-shaped sliding block is in sliding connection with the round rod, two square steel plates are fixedly connected to the round rod, a spring is arranged between each square steel plate and the reverse T-shaped sliding block, and the round rod between the steel ball and the square steel plate is in sliding connection in the sliding groove of the L-shaped steel plate; a cuboid short column is connected to the upper end of the reverse T-shaped sliding block, a lower rectangular steel plate is fixedly connected above the cuboid short column, a U-shaped damper is fixedly connected above the lower rectangular steel plate, an upper rectangular steel plate is fixedly connected above the U-shaped damper, and the upper rectangular steel plate is fixedly connected with the upper bottom plate.

[0010] In one embodiment of the present application, two L-shaped vertical plates are fixedly connected above the upper bottom plate, the two L-shaped vertical plates are oppositely arranged, and a plurality of reserved bolt holes are arranged on the opposite side of the two L-shaped vertical plates; the two L-shaped vertical plates are respectively located on the two sides of the transverse beam, and are fixedly connected with the transverse beam through first bolts; the upper bottom plate and the L-shaped vertical plates are fixedly connected through a plurality of bolts and nuts.

[0011] In one embodiment of the present application, the lower bottom plate is fixedly connected with the bent cap through a plurality of chemical anchors.

[0012] In one embodiment of the present application, the spring is sleeved on the outer periphery of the round rod, one end of the spring is fixedly connected with the square steel plate, the other end is fixedly connected with the reverse T-shaped sliding block, and a distance exists between the square steel plate and the steel ball.

[0013] In one embodiment of the present application, a slot is formed in the upper end of the reverse T-shaped sliding block, the slot is a square hole, the cuboid short column is inserted into the slot of the reverse T-shaped sliding block, and is fixedly connected with the reverse T-shaped sliding block.

[0014] In one embodiment of the present application, the cross-sectional area of the steel ball and the cross-sectional area of the square steel plate are both greater than the cross-sectional area of the sliding groove of the L-shaped steel plate.

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

[0016] In an embodiment of the present application, 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 fixedly connected with the U-shaped damper through second bolts, and the second bolts are a set of high-strength bolt connection pairs, including studs, nuts and washers.

[0017] In an embodiment of the present application, the bottom of the sliding groove of the L-shaped steel plate is provided with a lower notch on both sides, and the lower notch is used for locking the round rod.

[0018] Under the daily service state of the bridge, the round rod is located in the middle of the sliding groove of the L-shaped steel plate; the two square steel plates welded on the round rod are respectively reserved a distance from the steel round balls at the ends of the round rod, when the bridge is deformed due to the change of temperature, the inverted T-shaped sliding block will slide, at this time, the springs on both sides of the inverted T-shaped sliding block are pulled on one side and pressed on the other side, and the round rod slides along the longitudinal bridge to adapt to the deformation of the bridge caused by the change of temperature.

[0019] Under the action of the earthquake, due to the transverse bridge seismic force, the round rod slides into the lower notch at the edge of the sliding groove of the L-shaped steel plate in the transverse bridge direction and is locked; under the action of the longitudinal bridge seismic force, the main beam drives the inverted T-shaped sliding block to slide through the first connecting structure, at this time, the springs on both sides of the inverted T-shaped sliding block are pulled on one side and pressed on the other side, and are always in the elastic range, and at the same time, the round rod slides along the longitudinal bridge; when the longitudinal displacement of the main beam is large, the square steel plates welded on the round rod are in contact with the L-shaped steel plate, and the U-shaped damper deforms to dissipate the seismic energy; in addition, one of the two springs always in the elastic deformation range is pulled and the other is pressed, and the elastic restoring force provided by the two springs can make the pier and the beam return to the initial position.

[0020] On the other hand, the present application provides a manufacturing method of the self-resetting device for limiting the transverse bridge and preventing the longitudinal bridge from falling, which uses the self-resetting device for limiting the transverse bridge and preventing the longitudinal bridge from falling, and the manufacturing method comprises the following steps:

[0021] Step S1, when pouring in place, holes for installing the first bolts are reserved in the transverse beams between the main beams, and holes for installing chemical anchors are reserved in the bent caps;

[0022] Step S2, the first connecting structure is installed, the two L-shaped vertical plates are fixed with the transverse beams between the main beams through the first bolts, and the upper bottom plate is fixed with the L-shaped vertical plates through the bolts and nuts;

[0023] Step S3, install the energy dissipation self-resetting assembly, the round rod is sequentially threaded through the spring, the inverted T-shaped slider, the spring, and the two springs are welded to the inverted T-shaped slider and the square steel plate at both ends in the state of maintaining the original length of the two springs; then the two ends of the round rod are threaded through the sliding grooves of the two L-shaped steel plates, and a steel ball is welded at the end of the round rod; the cuboid short column is inserted into the insertion slot of the inverted T-shaped slider, and the lower end of the U-shaped damper is connected to the lower rectangular steel plate through the second bolt, and the upper end of the U-shaped damper is connected to the upper rectangular steel plate through the second bolt; the upper rectangular steel plate is connected to the upper bottom plate of the first connecting structure through welding, and the L-shaped steel plate is connected to the lower bottom plate of the second connecting structure through welding.

[0024] Step S4, install the second connecting structure, and connect and fix the lower bottom plate to the bent cap through the chemical anchor bolt.

[0025] The self-resetting device for limiting the transverse bridge direction and preventing the beam from falling in the longitudinal bridge direction and the manufacturing method have the following beneficial effects:

[0026] The self-reseting device for limiting the transverse bridge direction and preventing the beam from falling in the longitudinal bridge direction and the manufacturing method have the following beneficial effects:

[0027] In summary, the self-resetting device for limiting the transverse bridge direction and preventing the beam from falling in the longitudinal bridge direction and the manufacturing method can not only significantly improve the limiting efficiency of the beam in the longitudinal bridge direction, effectively prevent the occurrence of beam falling disasters, but also avoid high-cycle fatigue damage of the limiting device caused by temperature effects, and can efficiently dissipate seismic energy and realize self-resetting function under the action of the earthquake, thereby improving the overall seismic performance and safety of the bridge structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. The drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 The self-resetting device provided by the present application is shown in the perspective view.

[0030] Figure 2 The first connecting structure provided by the present application is shown in the front view.

[0031] Figure 3 The second connecting structure provided by the present application is shown in the front view.

[0032] Figure 4 The energy-dissipating self-resetting assembly provided by the present application is shown in the front view.

[0033] Figure 5 The energy-dissipating self-resetting assembly provided by the present application is shown in the exploded view.

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

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The application provides a self-resetting device for limiting in the transverse direction and preventing beam falling in the longitudinal direction, which can effectively solve the temperature fatigue damage problem of the damper in the daily operation stage, and can effectively control the relative displacement of the pier and the beam and provide self-resetting capacity under the action of the earthquake.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The application provides a self-resetting device for limiting in the transverse direction and preventing beam falling in the longitudinal direction, which comprises a first connecting structure, a second connecting structure and an energy dissipation self-resetting component arranged between the first connecting structure and the second connecting structure.

[0040] In some embodiments, the first connecting structure comprises an upper bottom plate 4, two L-shaped vertical plates 1 are fixedly connected above the upper bottom plate 4, the two L-shaped vertical plates 1 are oppositely arranged, and a plurality of reserved bolt holes are arranged on the opposite side of the two L-shaped vertical plates 1; the two L-shaped vertical plates 1 are respectively located on the two sides of the transverse beam and are fixedly connected with the transverse beam through first bolts 2.

[0041] In the embodiment, the transverse beam between the two L-shaped vertical plates 1 of the first connecting structure is inserted and fixedly connected through the first bolts 2.

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

[0043] In some embodiments, the second connecting structure comprises a lower bottom plate 16, the lower bottom plate 16 is fixedly connected with the bent cap through a plurality of chemical anchors 15, two oppositely arranged L-shaped steel plates 5 are fixedly connected above the lower bottom plate 16, and a sliding groove is formed on the opposite side of the two L-shaped steel plates 5.

[0044] In the embodiment, the lower bottom plate 16 of the second connecting structure is connected with the bent cap through the chemical anchors 15, and two oppositely arranged L-shaped steel plates 5 are fixedly connected above the lower bottom plate 16 through the welding mode.

[0045] In some embodiments, the energy dissipation self-resetting assembly comprises a round rod 6, both ends of which are fixedly connected with steel balls, the round rod 6 is sleeved with a reverse T-shaped sliding block 9, the reverse T-shaped sliding block 9 is in sliding connection with the round rod 6, the round rod 6 is fixedly connected with two square steel plates 7, a spring 8 is arranged between each square steel plate 7 and the reverse T-shaped sliding block 9, the spring 8 is sleeved on the outer periphery of the round rod 6, one end of the spring 8 is fixedly connected with the square steel plate 7, and the other end is fixedly connected with the reverse T-shaped sliding block 9, there is a certain distance between the square steel plate 7 and the steel ball, and the round rod 6 between the square steel plate 7 and the steel ball is in sliding connection in a sliding groove of the L-shaped steel plate 5.

[0046] Further, the upper end of the reverse T-shaped sliding block 9 is connected with a cuboid short column 14, the upper end of the cuboid short column 14 is fixedly connected with a lower rectangular steel plate 11, the upper end of the lower rectangular steel plate 11 is fixedly connected with a U-shaped damper 12, the upper end of the U-shaped damper 12 is fixedly connected with an upper rectangular steel plate 10, and the upper rectangular steel plate 10 is fixedly connected with the upper bottom plate 4.

[0047] Further, the upper end of the reverse T-shaped sliding block 9 is provided with a slot, the slot is a square hole, the cuboid short column 14 is inserted into the slot of the reverse T-shaped sliding block 9 and is fixedly connected with the reverse T-shaped sliding block 9.

[0048] Further, the cross-sectional area of the steel ball and the cross-sectional area of the square steel plate 7 are greater than the cross-sectional area of the sliding groove of the L-shaped steel plate 5. Through this design, the steel ball and the square steel plate 7 limit the sliding of the round rod 6 in the sliding groove of the L-shaped steel plate 5, avoiding the round rod 6 from being separated from the sliding groove of the L-shaped steel plate 5.

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

[0050] Further, the bottom of the two sides of the sliding groove of the L-shaped steel plate 5 is provided with a lower notch, and the lower notch is used for locking the round rod 6. When the round rod 6 is horizontally and bridgely slid into the edge lower notch of the sliding groove of the L-shaped steel plate 5, it is locked.

[0051] Alternatively, the round rod 6 is a high-strength round rod, and the spring 8 is a high-stiffness coefficient spring.

[0052] Further, the lower rectangular steel plate 11 and the upper rectangular steel plate 10 are fixedly connected with the U-shaped damper 12 through the second bolt 13, the second bolt 13 is a set of high-strength bolt connection pairs, including a stud, a nut and a gasket.

[0053] In the embodiment, the two ends of the round rod 6 of the energy dissipation self-resetting assembly pass through the sliding groove of the L-shaped steel plate 5 in the second connecting structure, and a steel ball is welded at the two ends of the round rod 6 to prevent the round rod 6 from being separated from the sliding groove. The round rod 6 is welded with two square steel plates 7, the round rod 6 between the two square steel plates 7 is provided with a reversed T-shaped sliding block 9, the two sides of the reversed T-shaped sliding block 9 are respectively provided with a spring 8 between the two square steel plates 7, one end of the spring 8 is fixedly connected with the square steel plate 7, and the other end is fixedly connected with the reversed T-shaped sliding block 9. A certain interval is set between the square steel plate 7 and the steel ball to adapt to the expansion deformation caused by the change of temperature in the normal service state of the bridge; the upper and lower ends of the U-shaped damper 12 are respectively connected with the upper rectangular steel plate 10 and the lower rectangular steel plate 11 through bolts, the upper rectangular steel plate 10 is fixedly connected with the upper bottom plate 4 of the first connecting structure, and the lower rectangular steel plate 11 is connected with the cuboid short column 14 through welding, and the cuboid short column 14 can be inserted into the slot reserved in the upper part of the reversed T-shaped sliding block 9.

[0054] In the normal service state of the bridge, the round rod 6 is located in the middle of the sliding groove of the L-shaped steel plate 5; the two square steel plates 7 welded on the round rod 6 are respectively reserved a certain distance from the steel balls at the ends of the round rod 6, when the bridge expands and deforms due to the change of temperature, the reversed T-shaped sliding block 9 will slide, at this time, the springs 8 on the two sides of the reversed T-shaped sliding block 9 are pulled on one side and pressed on the other side, and the round rod 6 slides along the longitudinal bridge direction to adapt to the deformation of the bridge caused by the change of temperature;

[0055] Under the action of the earthquake, due to the transverse bridge direction earthquake force, the round rod 6 slides into the edge of the sliding groove of the L-shaped steel plate 5 and is locked; under the action of the longitudinal bridge direction earthquake, the main beam drives the reversed T-shaped sliding block 9 to slide through the first connecting structure, at this time, the springs 8 on the two sides of the reversed T-shaped sliding block 9 are pulled on one side and pressed on the other side, and are always in the elastic range, and the round rod 6 also slides along the longitudinal bridge direction; when the longitudinal displacement of the main beam is large, the square steel plate 7 welded on the round rod 6 contacts with 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 always deforms elastically, and the other spring 8 is always in the elastic range, and the elastic restoring force provided by the two springs 8 can make the pier and the beam return to the initial position. Therefore, the self-resetting device provided by the application is beneficial to control the relative displacement between the pier and the beam under the action of the earthquake, reduce the risk of beam falling, and improve the reset ability.

[0056] In addition, the application also provides a manufacturing method of the self-resetting device for limiting the transverse bridge direction and preventing the longitudinal bridge direction from falling, which uses the self-resetting device for limiting the transverse bridge direction and preventing the longitudinal bridge direction from falling, and the manufacturing method comprises the following steps:

[0057] Step S1, when pouring in situ, the holes for installing the first bolt 2 are reserved in the transverse beam between the main beams, and the holes for installing the chemical anchor bolt 15 are reserved in the bent cap;

[0058] Step S2, install the first connecting structure, fix the two L-shaped vertical plates 1 and the cross beam between the main beam through the first bolt 2, and fix the upper bottom plate 4 and the L-shaped vertical plate 1 through the bolt and the nut 3;

[0059] Step S3, install the energy dissipation self-resetting assembly, the round rod 6 is sequentially inserted through the spring 8, the inverted T-shaped sliding block 9, the spring 8, in the state that the two springs 8 keep the original length, two square steel plates 7 are welded on the round rod 6, and the two ends of the two springs 8 are welded and connected with the inverted T-shaped sliding block 9 and the square steel plate 7 respectively; then the two ends of the round rod 6 are inserted through the sliding grooves of the two L-shaped steel plates 5, a steel ball is welded at the end of the round rod 6, the cuboid short column 14 is inserted into the insertion slot of the inverted T-shaped sliding block 9, the lower end of the U-shaped damper 12 is connected to the lower rectangular steel plate 11 through the second bolt 13, the upper end of the U-shaped damper 12 is connected to the upper rectangular steel plate 10 through the second bolt 13, the upper rectangular steel plate 10 is connected to the upper bottom plate 4 of the first connecting structure through welding, and the L-shaped steel plate 5 is connected to the lower bottom plate 16 of the second connecting structure through welding.

[0060] Step S4, install the second connecting structure, and connect and fix the lower bottom plate 16 and the bent cap through the chemical anchor 15.

[0061] Therefore, the self-resetting device for limiting the transverse bridge direction and preventing the falling beam in the longitudinal bridge direction and the manufacturing method have the advantages that when the beam body is deformed in the longitudinal bridge direction due to temperature change, the distance reserved between the square steel plates welded on the round rod and the L-shaped steel plates can ensure that the U-shaped damper does not be damaged by high-cycle fatigue; under the action of the earthquake, when the transverse displacement of the main beam reaches a certain degree, the round rod will fall into the notch below the edge of the sliding groove of the L-shaped steel plate and be locked, so as to limit the transverse movement of the beam body; when the longitudinal displacement of the pier and beam is large, the sliding of the inverted T-shaped sliding block will cause the deformation of the spring and drive the movement of the round rod; when the square steel plates welded on the two sides of the round rod are close to the L-shaped steel plates, the U-shaped damper is deformed to dissipate the seismic energy, so that the structural seismic damage can be effectively reduced; in the process of resisting the longitudinal displacement of the beam body, the elastic restoring force of the spring can make the beam body return to a certain safe position, so as to prevent the falling beam damage.

[0062] In conclusion, the self-resetting device for limiting the transverse bridge direction and preventing the falling beam in the longitudinal bridge direction and the manufacturing method have the advantages that the limiting efficiency of the beam body in the longitudinal bridge direction can be significantly improved, the occurrence of the falling beam disaster can be effectively prevented, the high-cycle fatigue damage of the limiting device caused by the temperature effect can be avoided, the seismic energy can be efficiently dissipated under the action of the earthquake, and the self-resetting function can be realized, so that the overall seismic performance and safety of the bridge structure are improved; in addition, the U-shaped damper is fixed through the bolt connection mode at the upper and lower ends, so that the U-shaped damper is easy to replace after the earthquake.

[0063] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A self-resetting device for limiting transverse bridge beams and preventing longitudinal bridge beams from falling off, characterized in that, The device includes a first connecting structure, a second connecting structure, and an energy-dissipating self-resetting component disposed between the first and second connecting structures. The first connecting structure includes an upper base plate. The second connecting structure includes a lower base plate, and two L-shaped steel plates arranged opposite each other are fixedly connected to the upper part of the lower base plate. A sliding groove is formed on one side of the two L-shaped steel plates facing each other. The energy-dissipating self-resetting component includes a round rod, and steel balls are fixedly connected to both ends of the round rod. An inverted T-shaped slider is fitted around the round rod, and the inverted T-shaped slider slides with the round rod. The connection includes two square steel plates fixedly connected to the round rod, with a spring between each square steel plate and the inverted T-shaped slider. The round rod between the steel ball and the square steel plate is slidably connected in the groove of the L-shaped steel plate. A cuboid short column is connected to the upper end of the inverted T-shaped slider. A lower rectangular steel plate is fixedly connected above the cuboid short column. A U-shaped damper is fixedly connected above the lower rectangular steel plate. An upper rectangular steel plate is fixedly connected above the U-shaped damper. The upper rectangular steel plate is fixedly connected to the upper base plate. The bottom of both sides of the sliding groove of the L-shaped steel plate is provided with a recess, which is used to lock the round rod. In normal service, the round rod is located in the middle of the groove of the L-shaped steel plate. The two square steel plates welded to the round rod are respectively separated from the steel ball at the end of the round rod. When the bridge expands and contracts 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 stretched 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 seismic action, due to the transverse seismic force, the round rod slides into the lower recess of the L-shaped steel plate groove and is locked in the transverse direction. Under the longitudinal seismic action, 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 under tension on one side and compression on the other side, and both are always within the elastic range. At the same time, the round rod is driven to slide along the longitudinal direction. When the longitudinal displacement of the main beam is large, after the square steel plate welded to the round rod comes into contact with the L-shaped steel plate, the U-shaped damper deforms and dissipates the seismic energy. In addition, the elastic restoring force provided by one of the two springs, which is always within the range of elastic deformation, is able to restore the pier and beam to their initial positions.

2. The self-resetting device according to claim 1, characterized in that, Two L-shaped uprights are fixedly connected to the top of the upper base plate. The two L-shaped uprights are arranged opposite each other, and several reserved bolt holes are provided on the opposite side of the two L-shaped uprights. The two L-shaped uprights are located on both sides of the transverse beam and are fixedly connected to the transverse beam by the first bolt. The upper base plate and the L-shaped uprights are fixedly connected by several bolts and nuts.

3. The self-resetting device according to claim 2, characterized in that, The bottom plate is fixedly connected to the cap beam by a number of chemical anchors.

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. 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, The upper end of the inverted T-shaped slider has a slot, which is a square hole. The cuboid short post 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 greater than the cross-sectional area of ​​the 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 sphere 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-spring-coefficient spring; the lower rectangular steel plate and the upper rectangular steel plate are both fixedly connected to the U-shaped damper by a second bolt, which is a set of high-strength bolt connection pairs, including a stud, a nut and a washer.

9. A method for manufacturing a self-resetting device for a transverse bridge limiting and longitudinal bridge anti-falling beam, characterized in that, The self-resetting device for limiting transverse and preventing longitudinal beam fall, as described in any one of claims 1-8, is manufactured using the following steps: Step S1: During on-site pouring, holes for installing the first bolts are reserved in the transverse diaphragms between the main beams, and holes for installing chemical anchors are reserved in the cap beam. Step S2: Install the first connecting structure. Fix the two L-shaped vertical plates to the crossbeam between the main beam using the first bolts. Fix the upper bottom plate to the L-shaped vertical plates using bolts and nuts. Step S3: Install the energy-dissipating self-resetting component. After the round rod passes through the spring, the inverted T-shaped slider, and the spring in sequence, with the two springs maintaining their original length, weld two square steel plates onto the round rod, and weld the two ends of the two springs to the inverted T-shaped slider and the square steel plates respectively. Then, after the two ends of the round rod pass through the grooves of the two L-shaped steel plates respectively, weld a steel ball to the end of the round rod. After inserting the rectangular short column into the slot of the inverted T-shaped slider, connect the lower end of the U-shaped damper to the lower rectangular steel plate with the second bolt, and connect the upper end of the U-shaped damper to the upper rectangular steel plate with the second bolt. Weld the upper rectangular steel plate to the upper base plate of the first connecting structure, and weld the L-shaped steel plate to the lower base plate of the second connecting structure. Step S4: Install the second connecting structure and connect and fix the bottom plate to the cap beam using chemical anchors.

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