Bridge expansion joint with good vibration reduction effect

Abstract

The invention relates to the technical field of expansion joints, and discloses a bridge expansion joint with a good damping effect, which comprises a pair of anchor plates which are oppositely arranged on two sides of the inner wall surface of a placing groove of the bridge expansion joint, the bottoms of the sides, close to each other, of the pair of anchor plates extend along the opposite direction to form first boundary beam profile steel, and the tops of the pair of anchor plates extend along the opposite direction to form second boundary beam profile steel; a displacement interval is defined by the two pieces of first boundary beam profile steel and the second boundary beam profile steel; the two ends of the first middle beam profile steel are in sliding contact with the first edge beam profile steel and the second edge beam profile steel correspondingly. The second middle beam profile steel is arranged between the two pieces of first edge beam profile steel in the horizontal direction, elastic assemblies are arranged at the two ends of the second middle beam profile steel correspondingly, and the elastic assemblies are in elastic sliding connection with the adjacent first edge beam profile steel; and the pair of third middle beam section steel is fixedly connected with the two pieces of second edge beam section steel in the horizontal direction, and a movable gap is formed between the pair of third middle beam section steel. The load of the bridge expansion joint can be increased, and a bridge body structure is better protected.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion joints, and in particular to a bridge expansion joint with good vibration damping effect. Background Art

[0002] The bridge deck expansion joint is an important part of the bridge structure, which can adaptively adjust the expansion and contraction deformation of the bridge caused by temperature changes, traffic loads or other external forces, thereby improving the service life of the bridge.

[0003] Common bridge expansion joints are composed of side beam steel, anchor plate, middle beam steel and rubber strip, etc. The bridge concrete and structural components are fixed by using the anchor plate and anchor bars, and the support beam and middle beam steel are vertically and movably connected in the displacement cavity, so as to play a role in dispersing the load. However, for the bridge expansion joints in the prior art, when facing strong external forces such as earthquakes, the generated active displacement often exceeds the size inside the displacement cavity, resulting in the structural components being prone to direct rigid contact with the bridge concrete, causing damage to the structural components and also causing damage to the bridge structure. At present, although some prior arts have proposed ways to enhance the expansion and contraction load of the bridge expansion joint, there are still certain problems in the actual application process. For example, in a bridge deck expansion joint structure and bridge vibration damping method with the patent number CN118600837A, by setting an electric hydraulic telescopic cylinder to support both sides of the bridge deck joint, although it can improve the load of the bridge expansion joint, the actual use cost is too high, and the hydraulic telescopic cylinder is installed in the bridge deck structure, and the long-term use will also cause damage to the structure of the hydraulic telescopic cylinder and lose the hydraulic support function. Therefore, there is an urgent need for a bridge expansion joint with good vibration damping effect to solve the above existing problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a bridge expansion joint with good vibration damping effect to solve the above existing problems in the prior art, and it can achieve improving the load of the bridge expansion joint and better protecting the bridge structure.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a bridge expansion joint with good vibration damping effect, including:

[0006] A pair of anchor plates are oppositely arranged on both sides of the inner wall surface of the placement groove of the bridge expansion joint. At the bottom of the mutually close sides of the pair of anchor plates, first side beam steels extend along the opposite direction, and at the top, second side beam steels extend along the opposite direction. The two first side beam steels and the second side beam steels enclose a displacement interval;

[0007] A first middle beam steel is arranged vertically between the first side beam steel and the second side beam steel on the same side. The two ends of the first middle beam steel are in sliding contact with the first side beam steel and the second side beam steel respectively;

[0008] The second middle beam section steel is horizontally arranged between the two first side beam section steels. Elastic components are respectively arranged at both ends of the second middle beam section steel, and the elastic components are elastically slidably connected to the adjacent first side beam section steels.

[0009] A pair of third middle beam section steels are fixedly connected to the two second side beam section steels respectively in the horizontal direction, and there is an activity gap between the pair of third middle beam section steels.

[0010] Preferably, it further includes:

[0011] A rubber block covers the top surface of the placement groove, and the rubber block is used to fill the gap between the second side beam section steel and the inner wall surface of the placement groove. The top surface of the third middle beam section steel is fixedly connected to the rubber block, and the rubber block is fixedly connected to the inner wall surface of the placement groove.

[0012] Preferably, the second middle beam section steel is of a C-shaped structure, the open ends of the second middle beam section steel are vertically downwardly distributed, a support plate is integrally formed and fixedly connected to one end of the first side beam section steel away from the anchor plate, the support plate vertically extends upward into the open end, and the elastic ends of the elastic components respectively abut against the mutually approaching sides of the side of the second middle beam section steel and the support plate.

[0013] Preferably, a first arc-shaped protrusion is fixedly connected to the top end of the support plate, a first arc-shaped groove is formed in the inner wall at the top end of the second middle beam section steel, the first arc-shaped protrusion is slidably limited in the first arc-shaped groove, a second arc-shaped protrusion is fixedly connected to the bottom end of the side of the second middle beam section steel, a second arc-shaped groove is formed in the top surface of the first side beam section steel, and the second arc-shaped protrusion is slidably limited in the second arc-shaped groove.

[0014] Preferably, the elastic component includes:

[0015] A first support spring. An elastic interval is formed between the side of the second middle beam section steel and the adjacent support plate. A plurality of first support springs are successively arranged along the axis direction of the elastic interval, and both ends of the first support spring are fixedly connected to the support plate and the second middle beam section steel respectively.

[0016] An elastic unit is of a plate-like structure and is symmetrically distributed along the center of the first support spring. The elastic unit is horizontally arranged at the top end and the bottom end of the first support spring respectively, and both ends of the elastic unit are connected to the support plate and the second middle beam section steel respectively.

[0017] Preferably, the elastic unit includes:

[0018] A pair of first support plates are fixedly connected to the side of the support plate close to the second middle beam section steel, and the pair of first support plates are symmetrically distributed along the center of the first support spring;

[0019] A pair of second support plates are slidably connected between a pair of first support plates, the second support plates are fixedly connected to the second center beam steel, a slide groove is provided on the first support plate, one end of the second support plate extends into the slide groove and is slidably connected to the slide groove, the two ends of the second support spring are respectively fixedly connected between the second support plate and the inner wall surface of the slide groove, and a plurality of second support springs are arranged along the axial direction of the elastic range.

[0020] Preferably, a connecting rod is fixedly connected to the side wall surface of the first center beam steel, and the connecting rod is fixedly connected to the anchor plate. A fixing plate is fixedly connected to the top end of the first center beam steel, and the fixing plate is an L-shaped structure, and the two sides of the fixing plate are respectively slidably connected to the second side beam steel and the third center beam steel, and the recessed part of the fixing plate faces the third center beam steel. A plurality of rubber columns are fixedly connected between the fixing plate and the third center beam steel, and the rubber columns are evenly spaced along the axial direction of the fixing plate.

[0021] Preferably, the second side beam steel is an arc-shaped structure, the protruding end of the second side beam steel faces the side wall of the placement groove, and the thickness of the second side beam steel is half of the thickness of the third middle beam steel.

[0022] Preferably, the mutually adjacent sides of a pair of the third center beam steel sections are wavy structures that can engage with each other.

[0023] Preferably, an anchor bar is fixedly connected to one side of the anchor plate close to the placement groove, and the anchor bar is anchored to the inner side wall of the placement groove.

[0024] The present invention discloses the following technical effects:

[0025] The present invention forms a displacement range of a square structure through a pair of anchor plates and cooperates with the first side beam steel and the second side beam steel, thereby increasing the cavity space of the traditional expansion joint displacement cavity, expanding the range of expansion and contraction to absorb the bridge load, and adding a first middle beam steel distributed in the vertical direction between the first side beam steel and the second side beam steel on the same side, and the first middle beam steel is in sliding contact with it, thereby forming a supporting force in the vertical direction for the first side beam steel and the second side beam steel. In addition, the second middle beam steel and the third middle beam steel are respectively used to elastically support the second side beam steel at the top and the first side beam steel at the bottom in the horizontal direction. When the bridge structure is subjected to external force, the gap between the third middle beam steel and the first side beam steel can be used to generate displacement deformation, thereby transmitting vibration to the elastic component for energy absorption, and protecting the bridge structure. On this basis, by expanding the displacement range of the activity range and improving the structural composition of the overall bridge expansion joint with the support strength, it is effectively achieved to increase the load of the bridge expansion joint and better protect the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, 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 paying creative labor.

[0027] Figure 1 A diagram showing the connection relationship between the bridge expansion joint and the bridge structure in the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the third middle beam steel in the present invention;

[0029] Figure 3 A diagram showing the connection relationship between the first side beam section steel and the first middle beam section steel in the present invention;

[0030] Figure 4 A diagram showing the connection relationship between the first support plate and the second support plate in the present invention;

[0031] Figure 5 It is a front view of the overall structure of the present invention;

[0032] Among them, 1. anchor plate; 2. first side beam steel; 3. second side beam steel; 4. first middle beam steel; 5. second middle beam steel; 6. third middle beam steel; 7. rubber block; 8. support plate; 9. first arc-shaped protrusion; 10. second arc-shaped protrusion; 11. first support spring; 12. first support plate; 13. second support plate; 14. second support spring; 15. connecting rod; 16. fixing plate; 17. rubber column; 18. anchor bar. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figure 1-Figure 5 The present invention provides a bridge expansion joint with good vibration reduction effect, comprising:

[0036] A pair of anchor plates 1 are arranged oppositely on both sides of the inner wall surface of the placement groove of the bridge expansion joint, and a first side beam steel 2 is extended in the opposite direction at the bottom of the pair of anchor plates 1 close to each other, and a second side beam steel 3 is extended in the opposite direction at the top, and the two first side beam steels 2 and the second side beam steel 3 enclose a displacement interval;

[0037] A first middle beam steel 4 is arranged between the first side beam steel 2 and the second side beam steel 3 on the same side in the vertical direction, and both ends of the first middle beam steel 4 are in sliding contact with the first side beam steel 2 and the second side beam steel 3 respectively;

[0038] The second middle beam steel 5 is arranged between the two first side beam steels 2 in the horizontal direction, and elastic components are respectively arranged at both ends of the second middle beam steel 5, and the elastic components are elastically slidably connected with the adjacent first side beam steels 2;

[0039] A pair of third middle beam steels 6 are respectively fixedly connected to the two second side beam steels 3 along the horizontal direction, and a movable gap is arranged between the pair of third middle beam steels 6 .

[0040] The present invention forms a displacement interval of a square structure through a pair of anchor plates 1 and cooperates with the first side beam steel 2 and the second side beam steel 3, increases the cavity space of the displacement inner cavity of the traditional expansion joint, expands the range of expansion and contraction to absorb the bridge load, and adds a first middle beam steel 4 distributed in the vertical direction between the first side beam steel 2 and the second side beam steel 3 on the same side, and the first middle beam steel 4 is in sliding contact with it, so as to form a supporting force in the vertical direction for the first side beam steel 2 and the second side beam steel 3. In addition, the second middle beam steel 5 and the third middle beam steel 6 are respectively elastically supported in the horizontal direction for the second side beam steel 3 at the top and the first side beam steel 2 at the bottom. When the bridge structure is subjected to external force, the gap between the third middle beam steel 6 and the first side beam steel 2 can be used to generate displacement deformation, thereby transmitting vibration to the elastic component for energy absorption and protecting the bridge structure. On this basis, by expanding the displacement interval of the range of activity and improving the structural composition of the overall bridge expansion joint with the support strength, it is effectively achieved to increase the load of the bridge expansion joint and better protect the bridge structure.

[0041] Specifically, the width of the movable gap between the pair of third middle beam steels 6 is smaller than the distance between the two first side beam steels 2 .

[0042] Furthermore, it also includes:

[0043] The rubber block 7 covers the top surface of the placement groove and is used to fill the gap between the second side beam steel 3 and the inner wall surface of the placement groove. The top surface of the third middle beam steel 6 is fixedly connected to the rubber block 7, and the rubber block 7 is fixedly connected to the inner wall surface of the placement groove.

[0044] By utilizing the elastic extension of the rubber block 7, the gap between the second side beam section steel 3 and the placement groove is filled, improving the connection integrity between the bridge expansion joint and the bridge structure. Moreover, the third middle beam section steel 6 is also fixedly connected to the rubber block 7. Since there is an activity gap between a pair of third middle beam section steels 6, when the vibration of the bridge structure is transmitted to the bridge expansion joint, the third middle beam section steel 6 moves and squeezes the rubber block 7, which can improve the energy absorption effect on the bridge structure.

[0045] Furthermore, the second middle beam section steel 5 is of a U-shaped structure, and the open ends of the second middle beam section steel 5 are vertically downward. One end of the first side beam section steel 2 away from the anchor plate 1 is integrally formed and fixedly connected with a support plate 8, and the support plate 8 extends vertically upward into the open end. The elastic ends of the elastic components respectively abut against the mutually adjacent sides of the side of the second middle beam section steel 5 and the support plate 8.

[0046] When the bridge structure vibrates, the anchor plate 1 drives the first side beam section steel 2 and the support plate 8 to move. By using the second middle beam section steel 5 to cover the two relatively distributed support plates 8, and the elastic components can respectively abut against the adjacent support plates 8 elastically along the two sides of the second middle beam section steel 5, thereby forming elastic telescopic energy absorption at the bottom of a pair of anchor plates 1.

[0047] Furthermore, a first arc-shaped protrusion 9 is fixedly connected to the top end of the support plate 8, a first arc-shaped groove is opened on the inner wall of the top end of the second middle beam section steel 5, the first arc-shaped protrusion 9 is slidably connected in the first arc-shaped groove in a limited manner, a second arc-shaped protrusion 10 is fixedly connected to the bottom end of the side of the second middle beam section steel 5, and a second arc-shaped groove is opened on the top surface of the first side beam section steel 2, and the second arc-shaped protrusion 10 is slidably connected in the second arc-shaped groove in a limited manner.

[0048] By respectively fixedly connecting the first arc-shaped protrusion 9 and the second arc-shaped protrusion 10 on the support plate 8 and the second middle beam section steel 5, when a pair of anchor plates 1 move and absorb energy, the sliding friction force between the support plate 8 and the second middle beam section steel 5 is effectively improved through the limiting effect of the first arc-shaped groove and the second arc-shaped groove, thereby improving the energy absorption effect and enhancing the structural stability of the overall bridge expansion joint.

[0049] Furthermore, the elastic components include:

[0050] A first support spring 11. An elastic interval is formed between the side of the second middle beam section steel 5 and the adjacent support plate 8. A plurality of first support springs 11 are successively arranged along the axis direction of the elastic interval, and the two ends of the first support spring 11 are respectively fixedly connected to the support plate 8 and the second middle beam section steel 5;

[0051] An elastic unit, which is of a plate-shaped structure and is symmetrically distributed along the center of the first support spring 11. The elastic units are horizontally arranged at the top and bottom of the first support spring 11 respectively, and the two ends of the elastic unit are respectively connected to the support plate 8 and the second middle beam section steel 5.

[0052] The first support spring 11 is used to elastically support the sides of the support plate 8 and the second center beam steel 5 respectively. At the same time, elastic units are provided at both ends of the first support spring 11 to provide secondary elastic support between the support plate 8 and the second center beam steel 5. This not only enhances the elastic support force and improves the energy absorption effect, but also limits and fixes the first support spring 11. During the extension and retraction process of the first support spring 11, the support plate 8 and the second center beam steel 5 are kept in the same sliding direction, thereby improving the structural stability of the first support spring 11.

[0053] Furthermore, the elastic unit includes:

[0054] A pair of first support plates 12 are fixedly connected to a side of the support plate 8 close to the second middle beam steel 5, and the pair of first support plates 12 are symmetrically distributed along the center of the first support spring 11;

[0055] A pair of second support plates 13 are slidably connected between a pair of first support plates 12. The second support plates 13 are fixedly connected to the second center beam steel 5. A slide groove is provided on the first support plate 12. One end of the second support plate 13 extends into the slide groove and is slidably connected to the slide groove. The two ends of the second support spring 14 are respectively fixedly connected between the second support plate 13 and the inner wall surface of the slide groove. A plurality of second support springs 14 are arranged along the axial direction of the elastic range.

[0056] By fixing the first support plate 12 to the support plate 8 and the second support plate 13 to the second center beam steel 5, utilizing the limited sliding connection between the first support plate 12 and the second support plate 13, and installing the second support spring 14 therebetween, during the relative sliding of a pair of anchor plates 1, the support plate 8 together with the first support plate 12 and the second support plate 13 on the second center beam steel 5 slide relatively, and are symmetrically distributed along the first support spring 11, thereby limiting the expansion and contraction of the first support spring 11, enhancing the elastic force of the overall bridge expansion joint, and enhancing the energy absorption load.

[0057] Furthermore, a connecting rod 15 is fixedly connected to the side wall of the first center beam steel 4, and the connecting rod 15 is fixedly connected to the anchor plate 1. A fixing plate 16 is fixedly connected to the top of the first center beam steel 4. The fixing plate 16 is an L-shaped structure, and the two sides of the fixing plate 16 are respectively slidably connected to the second side beam steel 3 and the third center beam steel 6. The recessed part of the fixing plate 16 faces the third center beam steel 6. A plurality of rubber columns 17 are fixedly connected between the fixing plate 16 and the third center beam steel 6. The rubber columns 17 are evenly spaced along the axial direction of the fixing plate 16.

[0058] In the present technical solution, the fixing plate 16 is also utilized for sliding connection with the second side beam steel 3 and the third center beam steel 6. The sliding stability of the second side beam steel 3 and the third center beam steel 6 is maintained through the L-shaped structure of the fixing plate 16, and a number of rubber columns 17 are fixedly connected between the fixing plate 16 and the third center beam steel 6 in the horizontal direction, thereby improving the structural stability of the overall bridge expansion joint and effectively improving the energy absorption effect of the bridge structure vibration.

[0059] Furthermore, the second side beam steel 3 is an arc-shaped structure, the protruding end of the second side beam steel 3 faces the side wall of the placement groove, and the thickness of the second side beam steel 3 is half of the thickness of the third middle beam steel 6.

[0060] The arc structure of the second side beam steel 3 is utilized to effectively fix the third center beam steel 6 and the anchor plate 1, and the thickness of the second side beam steel 3 is smaller than that of the third center beam steel 6, so that a gap can be formed between the second side beam steel 3 and the placement groove in structure to fill the rubber block 7, and the bottom end of the third center beam steel 6 is made to protrude relative to the second side beam steel 3, so that the L-shaped structure fixing plate 16 can cover the third center beam steel 6.

[0061] Furthermore, the mutually adjacent sides of a pair of third center beam steels 6 are wavy structures that can engage with each other.

[0062] In the present technical solution, a pair of third center beam steels 6 are interlocked with each other, and a movable gap is provided on the sides close to each other. When the bridge structure vibrates, the pair of third center beam steels 6 slide relative to each other. Under the limiting action of the mutually interlocking wave-shaped structures, the third center beam steels 6 can be prevented from sliding out of the placement groove, thereby ensuring the structural integrity of the bridge expansion joint.

[0063] Furthermore, an anchor bar 18 is fixedly connected to one side of the anchor plate 1 close to the placement groove, and the anchor bar 18 is anchored to the inner side wall of the placement groove.

[0064] The anchor plate 1 is fixed to the bridge body by anchor bars 18, so as to facilitate supporting the overall bridge expansion joint structure.

[0065] The working principle of a bridge expansion joint with good vibration reduction effect of the present invention is as follows:

[0066] When the bridge structure vibrates, the anchor plates 1 placed on both sides of the groove drive the first side beam steel 2 and the second side beam steel 3 to move toward each other. At this time, the support plate 8 of the first side beam steel 2 squeezes the first support spring 11, and the second middle beam steel 5 and the first support springs 11 elastically support the bridge vibration, and at the same time, the first support plate 12 and the second support plate 13 slide relative to each other, and the second support springs 14 cooperate with the first support plate 12 and the second support plate 13 to absorb the bridge structure for the second time. The two ends of the first middle beam steel 4 are in sliding contact with the first side beam steel 2 and the second side beam steel 3 in the vertical direction, and the third middle beam steel 6 is limited by the fixing plate 16 fixedly connected to the first middle beam steel 4, and a number of rubber columns 17 are fixedly connected between the fixing plate 16 and the third middle beam steel 6, so that the vibration of the bridge structure is absorbed for the third time, thereby improving the energy absorption load of the bridge structure and increasing the range of movable displacement, which can better protect the bridge structure.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A bridge expansion joint with good vibration reduction effect, characterized in that: Including: A pair of anchor plates (1) are oppositely arranged on both sides of the inner wall surface of the placement groove of the bridge expansion joint. At the bottom of the mutually approaching sides of the pair of anchor plates (1), first side beam steel sections (2) extend in the approaching direction, and at the top, second side beam steel sections (3) extend in the approaching direction. A displacement interval is enclosed by the two first side beam steel sections (2) and the second side beam steel sections (3); A first middle beam steel section (4) is arranged vertically between the first side beam steel sections (2) and the second side beam steel sections (3) on the same side. The two ends of the first middle beam steel section (4) are respectively in sliding contact with the first side beam steel section (2) and the second side beam steel section (3); A second middle beam steel section (5) is arranged horizontally between the two first side beam steel sections (2). Elastic components are respectively arranged at both ends of the second middle beam steel section (5), and the elastic components are elastically slidably connected to the adjacent first side beam steel section (2); A pair of third middle beam steel sections (6) are respectively fixedly connected to the two second side beam steel sections (3) horizontally. An activity gap is arranged between the pair of third middle beam steel sections (6).

2. The bridge expansion joint with good vibration reduction effect according to claim 1 is characterized in that: It further includes: A rubber block (7) covers the top surface of the placement groove, and the rubber block (7) is used to fill the gap between the second side beam steel section (3) and the inner wall surface of the placement groove. The top surface of the third middle beam steel section (6) is fixedly connected to the rubber block (7), and the rubber block (7) is fixedly connected to the inner wall surface of the placement groove.

3. The bridge expansion joint with good vibration reduction effect according to claim 1 is characterized in that: The second middle beam steel section (5) is of a U-shaped structure, and the open ends of the second middle beam steel section (5) are distributed vertically downward. A support plate (8) is integrally formed and fixedly connected to the end of the first side beam steel section (2) away from the anchor plate (1). The support plate (8) extends vertically upward into the open end, and the elastic ends of the elastic components respectively abut against the mutually approaching sides of the side of the second middle beam steel section (5) and the support plate (8).

4. The bridge expansion joint with good vibration reduction effect according to claim 3 is characterized in that: A first arc-shaped protrusion (9) is fixedly connected to the top end of the support plate (8). A first arc-shaped groove is formed in the inner wall at the top end of the second middle beam steel section (5). The first arc-shaped protrusion (9) is slidably connected in the first arc-shaped groove in a limited manner. A second arc-shaped protrusion (10) is fixedly connected to the bottom end of the side of the second middle beam steel section (5). A second arc-shaped groove is formed in the top surface of the first side beam steel section (2). The second arc-shaped protrusion (10) is slidably connected in the second arc-shaped groove in a limited manner.

5. The bridge expansion joint with good vibration reduction effect according to claim 3 is characterized in that: The elastic component includes: A first support spring (11). An elastic interval is formed between the side of the second middle beam steel section (5) and the adjacent support plate (8). A plurality of first support springs (11) are successively arranged along the axis direction of the elastic interval. The two ends of the first support spring (11) are respectively fixedly connected to the support plate (8) and the second middle beam steel section (5); An elastic unit is of a plate-like structure and is symmetrically distributed along the center of the first support spring (11). The elastic unit is horizontally arranged at the top end and the bottom end of the first support spring (11), and the two ends of the elastic unit are respectively connected to the support plate (8) and the second middle beam steel section (5).

6. The bridge expansion joint with good vibration reduction effect according to claim 5 is characterized in that: The elastic unit includes: A pair of first support plates (12) fixedly connected to a side of the support plate (8) close to the second center beam steel (5), and the pair of first support plates (12) are symmetrically distributed along the center of the first support spring (11); A pair of second support plates (13) are slidably connected between a pair of first support plates (12); the second support plates (13) are fixedly connected to the second center beam steel (5); a slide groove is provided on the first support plate (12); one end of the second support plate (13) extends into the slide groove and is slidably connected to the slide groove; two ends of a second support spring (14) are respectively fixedly connected between the second support plate (13) and the inner wall surface of the slide groove; a plurality of second support springs (14) are arranged along the axial direction of the elastic range.

7. The bridge expansion joint with good vibration reduction effect according to claim 1 is characterized in that: A connecting rod (15) is fixedly connected to the side wall of the first center beam steel (4), and the connecting rod (15) is fixedly connected to the anchor plate (1). A fixing plate (16) is fixedly connected to the top end of the first center beam steel (4), and the fixing plate (16) is an L-shaped structure. The two sides of the fixing plate (16) are respectively slidably connected to the second side beam steel (3) and the third center beam steel (6). The recessed part of the fixing plate (16) faces the third center beam steel (6). A plurality of rubber columns (17) are fixedly connected between the fixing plate (16) and the third center beam steel (6), and the rubber columns (17) are evenly spaced and distributed along the axis direction of the fixing plate (16).

8. The bridge expansion joint with good vibration reduction effect according to claim 1 is characterized in that: The second side beam steel (3) is an arc-shaped structure, the protruding end of the second side beam steel (3) faces the side wall surface of the placement groove, and the thickness of the second side beam steel (3) is half of the thickness of the third middle beam steel (6).

9. The bridge expansion joint with good vibration reduction effect according to claim 1 is characterized in that: The mutually adjacent sides of a pair of the third center beam steels (6) are wavy structures capable of interlocking with each other.

10. The bridge expansion joint with good vibration reduction effect according to claim 1, characterized in that: An anchor bar (18) is fixedly connected to one side of the anchor plate (1) close to the placement groove, and the anchor bar (18) is anchored to the inner side wall of the placement groove.

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