A steel structure bridge node connection structure

Abstract

The present invention discloses a steel structure bridge node connection structure, including a steel beam bridge, a bridge pier is arranged on the lower side of the steel beam bridge, a shock absorbing mechanism is arranged between the steel beam bridge and the bridge pier, four groups of supporting mechanisms are arranged on the lower side of the steel beam bridge and the outer side of the bridge pier, the shock absorbing mechanism includes a plurality of groups of first reinforcing bars fixedly arranged on the inner side of the steel beam bridge, an upper mounting plate is fixedly arranged on the lower end of the plurality of groups of first reinforcing bars, a lower mounting plate is fixedly arranged on the upper end of the bridge pier, and a fixing block is fixedly welded to the lower end of the upper mounting plate and the upper end of the lower mounting plate. The steel structure bridge node connection structure described in the present invention is convenient for the steel structure bridge node to be used in an earthquake or in normal life through the mutual cooperation between the shock absorbing mechanism and the supporting mechanism, and the shock absorbing performance is not easily triggered under normal circumstances. Secondly, double-layer shock absorption is performed in extreme earthquake conditions to improve the seismic performance of the node connection.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure bridges, and in particular to a steel structure bridge node connection structure. Background Art

[0002] A steel structure bridge is a bridge whose main load-bearing structure is made of steel, that is, a steel structure bridge or a steel bridge.

[0003] The invention with publication number CN113215973A discloses a bridge steel structure node connection structure, including an upper mounting plate, an upper offset unit, an adjustment unit, a lower mounting plate and a lower offset unit, wherein the upper mounting plate is provided with an upper offset unit, the lower end of the upper mounting plate is connected with the lower mounting plate through the adjustment unit, and the lower side of the lower mounting plate is provided with a lower offset unit. The invention can solve the following problems existing in the existing bridge support structure during specific construction: First, before the bridge deck is placed on the top of the bridge pier for fixing, the horizontal and vertical directions of the bridge deck still need to be adjusted by the bridge support structure, and the existing bridge support structure is difficult to adjust the bridge deck in multiple directions, and the scope of application is small; Second, after the existing bridge is completed and used for a long time, the bridge pier may have a certain settlement, causing the road surface on the bridge to tilt. If the existing bridge support structure cannot be maintained and adjusted in time, the bridge support structure will be tilted and squeezed and separated from the bridge pier.

[0004] However, the invention still has some shortcomings. For example, the node connection structure of the steel structure bridge is mostly rigidly connected. Usually, in extreme conditions such as earthquakes, the force from the seismic waves will squeeze the connection between the steel beam bridge and the pier, making the force on the node connection structure uneven, unable to perform good seismic resistance according to the seismic pressure, and unable to move with the steel beam body, which makes the node connection structure prone to deformation. Summary of the invention

[0005] The main purpose of the present invention is to provide a steel structure bridge node connection structure, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A steel structure bridge node connection structure, comprising a steel beam bridge, a pier is arranged on the lower side of the steel beam bridge, a shock absorbing mechanism is arranged between the steel beam bridge and the pier, four groups of supporting mechanisms are arranged on the lower side of the steel beam bridge and the outer side of the pier, the shock absorbing mechanism comprises a plurality of groups of first reinforcing ribs fixedly arranged on the inner side of the steel beam bridge, an upper mounting plate is fixedly arranged on the lower end of the plurality of groups of first reinforcing ribs, a lower mounting plate is fixedly arranged on the upper end of the pier, a fixing block is fixedly welded to the lower end of the upper mounting plate and the upper end of the lower mounting plate, an extrusion plate is fixedly arranged on the opposite ends of the two groups of the fixing blocks, a frame is movably sleeved on the outer sides of the two groups of the extrusion plates, a plurality of groups of steel plates are fixedly arranged on the inner side of the frame, and the inner side of the frame near the positions between the plurality of groups of steel plates is A damping plate is fixedly arranged, and four groups of upper fixed axis frames are fixedly arranged near the outer side of the lower end of the upper mounting plate, and upper movable axis are movably arranged on the inner sides of the four groups of upper fixed axis frames, and four groups of lower fixed axis frames are fixedly arranged near the outer side of the upper end of the lower mounting plate, and lower movable axis are movably arranged on the inner sides of the four groups of lower fixed axis frames, and four groups of fixed frames are fixedly arranged on the outer side of the frame, and four groups of movable blocks are movably arranged on the inner sides of the four groups of fixed frames, and cylinders are fixedly arranged at one end of the four groups of fixed frames, and return pipes are arranged on the upper sides of the four groups of cylinders, and pistons are movably arranged on the inner sides of the four groups of cylinders, and pull rods are fixedly connected to one end of the four groups of pistons, and damping fluid is fixedly arranged on the inner sides of the four groups of cylinders and the four groups of return pipes.

[0008] Preferably, several groups of the first reinforcing bars are fixedly inserted into the inner side of the steel beam bridge, and two groups of the extrusion plates are limitedly fixedly arranged at the inner side of the frame.

[0009] Preferably, several groups of the steel plates and several groups of the damping plates are cross-arranged, and several groups of the damping plates are made of high-damping rubber material.

[0010] Preferably, the four groups of upper movable shafts, the four groups of lower movable shafts and the four groups of movable blocks are movably connected, and the four groups of movable blocks are limitedly slidably arranged at the inner side positions of the four groups of fixed frames.

[0011] Preferably, the four groups of cylinders and the four groups of reflux pipes are all connected, and the four groups of pistons are limitedly slid on the inner side of the cylinders.

[0012] Preferably, the four groups of pull rods all pass through one side of the four groups of cylinders and are fixedly connected to the movable blocks.

[0013] Preferably, the damping fluid is made of high-viscosity silicone oil.

[0014] Preferably, the supporting mechanism includes a second reinforcing rib fixedly arranged at the lower side of the steel beam bridge, a first connecting plate fixedly arranged at the lower end of the second reinforcing rib, connecting rods fixedly arranged at the lower end of the first connecting plate near both sides, spherical shafts fixedly arranged at the lower sides of the two groups of connecting rods, two groups of third reinforcing ribs fixedly arranged at the front side of the pier, the front ends of the two groups of third reinforcing ribs fixedly connected to the second connecting plate, a movable shaft frame fixedly arranged at the upper end of the second connecting plate, a pull rope fixedly arranged at the lower end of the first connecting plate near the center, a metal ball fixedly sleeved on the outer side of the pull rope, a plug rod fixedly connected to the lower end of the pull rope, a circular hole is provided on the inner side of the spherical shaft corresponding to the plug rod position, a magnetic block is fixedly provided on the lower side of the two groups of connecting rods near the front side, and a plug hole is provided on the inner side of the movable shaft frame corresponding to the plug rod position.

[0015] Preferably, the second reinforcing ribs are fixedly inserted at the lower side of the steel beam bridge, the two groups of the third reinforcing ribs are fixedly inserted at the front side of the pier, and the spherical shaft is limited and movable at the inner side position of the movable shaft frame.

[0016] Preferably, the width of the circular hole is slightly larger than the width of the insertion rod, and both the magnetic block and the insertion rod are magnetically configured.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the bridge is in a normal state, the rod pulled by the pull rope will pass through the round hole on the inside of the spherical shaft and be inserted into the socket, so that the spherical shaft is fixed on the inside of the movable shaft frame, and the two sets of connecting rods will not be tilted. Then, several sets of connecting rods can cooperate with the spherical shaft and the movable shaft frame to fix and support the steel beam bridge and the piers, so as to realize the normal driving and living use of the bridge.

[0019] Secondly, when extreme situations such as earthquakes occur, the strong vibration waves of the earthquake will cause the four sets of pull ropes and the four sets of metal balls to shake, and then the four sets of rods will be pulled out from the inside of the four sets of round holes, and then the magnetic settings of the four sets of rods and the four sets of magnetic blocks will be used to pull the four sets of rods out of the four sets of holes and adsorb on the four sets of magnetic blocks, so that the spherical shaft will be movably connected with the movable shaft frame, so as to realize the flexible connection of the steel beam bridge and the pier node in the event of an earthquake, avoid the hard squeezing of the node connection between the steel beam bridge and the pier when it is affected by shock waves, and can move according to the earthquake pressure, thereby preventing the node connection from being easily deformed.

[0020] In addition, when the spherical shaft is movably connected to the movable shaft frame, several groups of first reinforcing bars are inserted into the inner side of the steel beam bridge, so that the first reinforcing bars are fixedly connected to the steel beam bridge, and the lower mounting plate is fixedly connected to the bridge pier. Therefore, according to the effect of vibration waves, the two groups of fixed blocks will push the two groups of extrusion plates to extrude several groups of steel plates and damping plates, and the damping plates made of several groups of high-damping rubber materials are elastically extruded and deformed to absorb seismic waves and reduce the transmission of vibration, thereby protecting the stability and safety of the bridge node connection structure and improving the service life of the bridge in unexpected situations.

[0021] Finally, in the process of the upper mounting plate and the lower mounting plate approaching and popping apart from each other, the four sets of upper fixed axis frames and the four sets of lower fixed axis frames will push the four sets of upper movable axes and the four sets of lower movable axes to cross each other, so that the four sets of movable blocks will slide on the inner side of the four sets of fixed frames, thereby pushing the four sets of pull rods and the four sets of pistons to move back and forth, and the four sets of pistons will reciprocate to push the damping liquid inside the four cylinders, so that the damping liquid made of high-viscosity silicone oil material is filled inside the cylinder, and reciprocating friction damping is used to further reduce the transmission of vibration, thereby performing double-layer shock absorption and improving the seismic resistance of the node connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0024] Figure 3 It is a partial cross-sectional structural schematic diagram of the shock absorbing mechanism of the present invention;

[0025] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 5 It is a schematic diagram of the supporting mechanism structure of the present invention;

[0027] Figure 6 for Figure 5 The enlarged structural diagram of the middle B part;

[0028] Figure 7 It is a schematic diagram of the local structure of the support mechanism of the present invention.

[0029] In the figure: 1, steel beam bridge; 2, bridge pier; 3, shock absorbing mechanism; 31, first reinforcing rib; 32, upper mounting plate; 33, lower mounting plate; 34, fixed block; 35, extrusion plate; 36, frame; 37, steel plate; 38, damping plate; 39, upper fixed shaft frame; 310, upper movable shaft; 311, lower fixed shaft frame; 312, lower movable shaft; 313, fixed frame; 314, movable block; 315, cylinder ; 316, return pipe; 317, piston; 318, pull rod; 319, damping fluid; 4, supporting mechanism; 41, second reinforcing rib; 42, first connecting plate; 43, connecting rod; 44, spherical shaft; 45, third reinforcing rib; 46, second connecting plate; 47, movable shaft frame; 48, pull rope; 49, metal ball; 410, plug rod; 411, round hole; 412, magnetic block; 413, socket. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the directions or positions indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are relative relationships 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] See also Figure 1-Figure 7An embodiment of the present invention is as follows: a steel structure bridge node connection structure, comprising a steel beam bridge 1, a pier 2 is arranged at the lower side of the steel beam bridge 1, a shock absorbing mechanism 3 is arranged between the steel beam bridge 1 and the pier 2, four groups of supporting mechanisms 4 are arranged at the lower side of the steel beam bridge 1 and the outer side of the pier 2, the shock absorbing mechanism 3 comprises a plurality of groups of first reinforcing ribs 31 fixedly arranged on the inner side of the steel beam bridge 1, an upper mounting plate 32 is fixedly arranged at the lower end of the plurality of groups of first reinforcing ribs 31, a lower mounting plate 33 is fixedly arranged at the upper end of the pier 2, a fixing block 34 is fixedly welded at the lower end of the upper mounting plate 32 and the upper end of the lower mounting plate 33, an extrusion plate 35 is fixedly arranged at the opposite end of the two groups of fixing blocks 34, a frame 36 is movably sleeved on the outer side of the two groups of extrusion plates 35, a plurality of groups of steel plates 37 are fixedly arranged on the inner side of the frame 36, and a plurality of steel plates 37 are fixedly arranged at the inner side of the frame 36 near the plurality of groups of steel plates 37 There is a damping plate 38, four groups of upper fixed shaft frames 39 are fixedly arranged near the outer side of the lower end of the upper mounting plate 32, and upper movable shafts 310 are movably arranged on the inner sides of the four groups of upper fixed shaft frames 39, four groups of lower fixed shaft frames 311 are fixedly arranged near the outer side of the upper end of the lower mounting plate 33, and lower movable shafts 312 are movably arranged on the inner sides of the four groups of lower fixed shaft frames 311, four groups of fixed frames 313 are fixedly arranged on the outer side of the frame 36, and four groups of movable blocks 314 are movably arranged on the inner sides of the four groups of fixed frames 313, cylinders 315 are fixedly arranged on one end of the four groups of fixed frames 313, return pipes 316 are arranged on the upper sides of the four groups of cylinders 315, pistons 317 are movably arranged on the inner sides of the four groups of cylinders 315, and pull rods 318 are fixedly connected to one ends of the four groups of pistons 317, and damping fluids 319 are fixedly arranged on the inner sides of the four groups of cylinders 315 and the four groups of return pipes 316.

[0033] Several groups of first reinforcing ribs 31 are fixedly inserted into the inner side of the steel beam bridge 1, two groups of extrusion plates 35 are fixedly set at the inner side of the frame 36, several groups of steel plates 37 and several groups of damping plates 38 are cross-set, several groups of damping plates 38 are made of high-damping rubber material, four groups of upper movable shafts 310, four groups of lower movable shafts 312 and four groups of movable blocks 314 are movably connected, four groups of movable blocks 314 are limitedly slidably set at the inner side of four groups of fixed frames 313, four groups of cylinders 315 and four groups of return pipes 316 are all connected, four groups of pistons 317 are limitedly slidably set on the inner side of the cylinder 315, four groups of pull rods 318 all pass through one side of the four groups of cylinders 315 and are fixedly connected to the movable blocks 314, and the damping fluid 319 is made of high-viscosity silicone oil.

[0034] When the spherical shaft 44 is movably connected with the movable shaft frame 47, the first reinforcing ribs 31 are inserted into the inner side of the steel beam bridge 1 according to the plurality of groups, so that the first reinforcing ribs 31 are fixedly connected with the steel beam bridge 1, and the lower mounting plate 33 is fixedly connected with the bridge pier 2, so that according to the effect of the vibration wave, the two groups of fixing blocks 34 push the two groups of extrusion plates 35 to extrude the plurality of steel plates 37 and the damping plates 38, and the damping plates 38 made of a plurality of groups of high-damping rubber materials are elastically extruded and deformed to absorb the seismic waves and reduce the transmission of vibration, thereby protecting the stability and safety of the bridge node connection structure and improving the service life of the bridge in unexpected situations. Finally, the upper mounting plate 32 and the lower mounting plate 3 In the process of moving closer to each other and bouncing apart, the four sets of upper fixed shaft frames 39 and the four sets of lower fixed shaft frames 311 will push the four sets of upper movable shafts 310 and the four sets of lower movable shafts 312 to cross each other, so that the four sets of movable blocks 314 slide inside the four sets of fixed frames 313, thereby pushing the four sets of pull rods 318 and the four sets of pistons 317 to reciprocate, and the four sets of pistons 317 reciprocate to push the damping liquid 319 inside the four sets of cylinders 315, so that the damping liquid 319 set by high-viscosity silicone oil material is filled inside the cylinder 315, and the reciprocating friction damping is used to further reduce the transmission of vibration, thereby performing double-layer shock absorption and improving the seismic performance of the node connection.

[0035] The supporting mechanism 4 includes a second reinforcing rib 41 fixedly arranged at the lower side of the steel beam bridge 1, a first connecting plate 42 fixedly arranged at the lower end of the second reinforcing rib 41, connecting rods 43 fixedly arranged at the lower end of the first connecting plate 42 near both sides, spherical shafts 44 fixedly arranged at the lower sides of the two groups of connecting rods 43, two groups of third reinforcing ribs 45 fixedly arranged at the front side of the pier 2, a second connecting plate 46 fixedly connected to the front ends of the two groups of third reinforcing ribs 45, a movable shaft frame 47 fixedly arranged at the upper end of the second connecting plate 46, a pull rope 48 fixedly arranged at the lower end of the first connecting plate 42 near the center, and the outer side of the pull rope 48 is fixedly sleeved There is a metal ball 49, and the lower end of the pull rope 48 is fixedly connected to the plug rod 410. A round hole 411 is opened on the inner side of the spherical shaft 44 corresponding to the position of the plug rod 410. A magnetic block 412 is fixedly set on the lower side of the two groups of connecting rods 43 near the front side. A plug hole 413 is opened on the inner side of the movable shaft frame 47 corresponding to the position of the plug rod 410. The second reinforcement rib 41 is fixedly inserted on the lower side of the steel beam bridge 1, and two groups of third reinforcement ribs 45 are fixedly inserted on the front side of the pier 2. The spherical shaft 44 is limited and movable on the inner side of the movable shaft frame 47. The width of the round hole 411 is slightly larger than the width of the plug rod 410, and the magnetic block 412 and the plug rod 410 are both magnetically set.

[0036] When the bridge is in a normal state, the plug rod 410 pulled by the pull rope 48 will pass through the round hole 411 on the inner side of the spherical shaft 44 and be inserted into the plug hole 413, so that the spherical shaft 44 is fixed on the inner side of the movable shaft frame 47, and the two groups of connecting rods 43 will not be tilted, so that several groups of connecting rods 43 cooperate with the spherical shaft 44 and the movable shaft frame 47 to fix and support the steel beam bridge 1 and the bridge pier 2, so as to realize the normal driving and life use of the bridge. Secondly, when an extreme situation such as an earthquake occurs, the strong vibration wave of the earthquake will cause the four groups of pull ropes 48 and the four groups of metal balls 49 to shake, thereby pulling The movable four groups of plug rods 410 are pulled out from the inner sides of the four groups of circular holes 411, and then the magnetic settings of the four groups of plug rods 410 and the four groups of magnetic blocks 412 are coordinated to make the four groups of plug rods 410 be pulled out from the four groups of plug holes 413 and adsorbed on the four groups of magnetic blocks 412, so that the spherical shaft 44 will be movably connected with the movable shaft frame 47, so as to realize the flexible connection between the nodes of the steel beam bridge 1 and the pier 2 in the event of an earthquake, avoid the hard squeezing of the node connection between the steel beam bridge and the pier when subjected to shock waves, and can be movable according to the earthquake pressure, thereby preventing the node connection from being easily deformed.

[0037] Working principle:

[0038] During use, when the bridge is in a normal state, the plug rod 410 pulled by the pull rope 48 will penetrate the circular hole 411 on the inner side of the spherical shaft 44 and be inserted into the plug hole 413, so that the spherical shaft 44 is fixed to the inner side of the movable shaft frame 47, and the two groups of connecting rods 43 will not be tilted, so that the several groups of connecting rods 43 cooperate with the spherical shaft 44 and the movable shaft frame 47 to fix and support the steel beam bridge 1 and the bridge pier 2, so as to realize the normal driving and life use of the bridge. Secondly, when an extreme situation such as an earthquake occurs, the strong vibration wave of the earthquake will cause the four groups of pull ropes 48 and the four groups of metal balls 49 to shake, and then the four groups of plug rods 410 pulled in the four groups of circular holes 4 11 is pulled out from the inside, and then the magnetic setting of the four groups of plug rods 410 and the four groups of magnetic blocks 412 is matched, so that the four groups of plug rods 410 are pulled out from the four groups of plug holes 413 and adsorbed on the four groups of magnetic blocks 412, so that the spherical shaft 44 will be movably connected with the movable shaft frame 47, so as to realize the flexible connection of the node of the steel beam bridge 1 and the bridge pier 2 in the event of an earthquake, avoid the hard squeezing of the node connection between the steel beam bridge and the bridge pier when subjected to the shock wave, and can be moved according to the earthquake pressure, thereby preventing the node connection from being easily deformed. In addition, when the spherical shaft 44 is movably connected with the movable shaft frame 47, according to the plurality of groups of first reinforcing bars 31, the first reinforcing bars 31 are inserted into the movable shaft frame 47, and the first reinforcing bars 31 are inserted into the movable shaft frame 47, so as to prevent the node connection from being easily deformed. The first reinforcement rib 31 is inserted into the inner side of the steel beam bridge 1, thereby fixing the first reinforcement rib 31 with the steel beam bridge 1, and cooperating with the lower mounting plate 33 to be fixedly connected with the bridge pier 2, so that according to the effect of the vibration wave, the two groups of fixing blocks 34 will push the two groups of extrusion plates 35 to squeeze the several groups of steel plates 37 and damping plates 38, and the damping plates 38 set with several groups of high-damping rubber materials are elastically extruded and deformed to absorb the seismic waves and reduce the transmission of vibration, thereby protecting the stability and safety of the bridge node connection structure and improving the service life of the bridge in unexpected situations. Finally, in the process of the upper mounting plate 32 and the lower mounting plate 33 approaching and bouncing apart from each other, through The four groups of upper fixed shaft frames 39 and the four groups of lower fixed shaft frames 311 will push the four groups of upper movable shafts 310 and the four groups of lower movable shafts 312 to cross, thereby making the four groups of movable blocks 314 slide on the inner side of the four groups of fixed frames 313, thereby pushing the four groups of pull rods 318 and the four groups of pistons 317 to move back and forth, and the four groups of pistons 317 reciprocate to push the damping liquid 319 inside the four groups of cylinders 315, so that the damping liquid 319 made of high-viscosity silicone oil material is filled inside the cylinder 315, and reciprocating friction damping is performed to further reduce the transmission of vibration, thereby performing double-layer shock absorption and improving the seismic resistance of the node connection.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure bridge node connection structure, comprising a steel beam bridge (1), characterized in that: A bridge pier (2) is arranged at the lower side of the steel beam bridge (1), a shock absorbing mechanism (3) is arranged between the steel beam bridge (1) and the bridge pier (2), four groups of supporting mechanisms (4) are arranged at the lower side of the steel beam bridge (1) and the outer side of the bridge pier (2), the shock absorbing mechanism (3) comprises a plurality of groups of first reinforcing ribs (31) fixedly arranged at the inner side of the steel beam bridge (1), upper mounting plates (32) are fixedly arranged at the lower ends of the plurality of groups of first reinforcing ribs (31), and a lower mounting plate (32) is fixedly arranged at the upper end of the bridge pier (2). 3), the lower end of the upper mounting plate (32) and the upper end of the lower mounting plate (33) are both fixedly welded with a fixing block (34), the opposite ends of the two groups of the fixing blocks (34) are both fixedly provided with an extrusion plate (35), the outer sides of the two groups of the extrusion plates (35) are movably sleeved with a frame (36), the inner side of the frame (36) is fixedly provided with a plurality of groups of steel plates (37), the inner side of the frame (36) is fixedly provided with a damping plate (38) near the positions between the plurality of groups of steel plates (37), the upper mounting plate ( Four groups of upper fixed shaft frames (39) are fixedly arranged near the outer side of the lower end of the frame (32), and upper movable shafts (310) are movably arranged on the inner sides of the four groups of upper fixed shaft frames (39); four groups of lower fixed shaft frames (311) are fixedly arranged near the outer side of the upper end of the lower mounting plate (33), and lower movable shafts (312) are movably arranged on the inner sides of the four groups of lower fixed shaft frames (311); four groups of fixed frames (313) are fixedly arranged on the outer side of the frame (36), and the four groups of fixed frames (313) are movably arranged on the inner sides of the four groups of lower fixed shaft frames (313). Four groups of movable blocks (314) are movably arranged on the inner side, one end of each of the four groups of fixed frames (313) is fixedly arranged with a cylinder (315), the upper side of each of the four groups of cylinders (315) is provided with a return pipe (316), the inner side of each of the four groups of cylinders (315) is movably arranged with a piston (317), one end of each of the four groups of pistons (317) is fixedly connected with a pull rod (318), and the inner sides of each of the four groups of cylinders (315) and the four groups of return pipes (316) are fixedly arranged with a damping liquid (319); The support mechanism (4) comprises a second reinforcing rib (41) fixedly arranged at a lower position of the steel beam bridge (1); a first connecting plate (42) is fixedly arranged at the lower end of the second reinforcing rib (41); connecting rods (43) are fixedly arranged at the lower end of the first connecting plate (42) near both sides; spherical shafts (44) are fixedly arranged at the lower sides of two groups of connecting rods (43); two groups of third reinforcing ribs (45) are fixedly arranged at the front side of the pier (2); the front ends of the two groups of third reinforcing ribs (45) are fixedly connected to the second connecting plate (46); the upper end of the second connecting plate (46) A movable shaft frame (47) is fixedly provided, a pull rope (48) is fixedly provided at a position near the center of the lower end of the first connecting plate (42), a metal ball (49) is fixedly sleeved on the outer side of the pull rope (48), an insertion rod (410) is fixedly connected to the lower end of the pull rope (48), a round hole (411) is provided on the inner side of the spherical shaft (44) at a position corresponding to the insertion rod (410), a magnetic block (412) is fixedly provided on the lower side of the two groups of connecting rods (43) near the front side, and an insertion hole (413) is provided on the inner side of the movable shaft frame (47) at a position corresponding to the insertion rod (410); The second reinforcing rib (41) is fixedly inserted on the lower side of the steel beam bridge (1), the two sets of the third reinforcing ribs (45) are fixedly inserted on the front side of the bridge pier (2), and the spherical shaft (44) is limited and movable at the inner side of the movable shaft frame (47); The width of the circular hole (411) is slightly greater than the width of the insertion rod (410), and both the magnetic block (412) and the insertion rod (410) are magnetically arranged.

2. A steel structure bridge node connection structure according to claim 1, characterized in that: A plurality of groups of the first reinforcing bars (31) are fixedly inserted into the inner side of the steel beam bridge (1), and two groups of the extrusion plates (35) are fixedly arranged at inner sides of the frame (36) in a limited position.

3. A steel structure bridge node connection structure according to claim 1, characterized in that: The plurality of groups of steel plates (37) and the plurality of groups of damping plates (38) are arranged crosswise, and the plurality of groups of damping plates (38) are made of high-damping rubber material.

4. A steel structure bridge node connection structure according to claim 1, characterized in that: The four groups of upper movable shafts (310), the four groups of lower movable shafts (312) and the four groups of movable blocks (314) are movably connected, and the four groups of movable blocks (314) are limitedly slidably arranged at inner positions of the four groups of fixed frames (313).

5. The steel structure bridge node connection structure according to claim 1, characterized in that: The four groups of cylinders (315) and the four groups of return pipes (316) are all connected, and the four groups of pistons (317) are limitedly slidable on the inner side of the cylinders (315).

6. A steel structure bridge node connection structure according to claim 1, characterized in that: The four groups of pull rods (318) all pass through one side of the four groups of cylinders (315) and are fixedly connected to the movable blocks (314).

7. The steel structure bridge node connection structure according to claim 1, characterized in that: The damping fluid (319) is made of high-viscosity silicone oil.

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