A multi-damping buffer energy-absorbing bridge seismic stopper structure

Abstract

The present invention discloses a multi-damping buffering energy-absorbing bridge seismic stopper structure, including a steel corbel, a stopper structure, a steel baffle and a damper structure, wherein the steel corbel is fixed above the side wall of the pier by a steel corbel bolt; the stopper structure is arranged between the steel corbel and the main beam; four steel baffles are respectively connected to the four side walls of the stopper structure by a damper structure; and the two ends of the damper structure are respectively connected to the stopper structure and the steel baffle by damper side plate bolts. The present invention buffers and consumes earthquake energy through the combined action of multiple damper structures and a collision ball in the middle; limits the displacement between the beam body and the pier in the transverse direction, along the bridge direction and vertically, and effectively prevents the beam from falling; converts the rigid collision between the bridge and the stopper into a flexible collision inside the seismic stopper structure of the bridge, and transfers the collision between the beam bodies to the stopper, which not only reduces the damage to the bridge caused by the earthquake, but also reduces the damage to the stopper itself.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge earthquake resistance, and in particular relates to a multiple damping buffer energy-absorbing bridge earthquake resistance stopper structure. Background Art

[0002] Bridges play a vital role in transportation. As the country's demand for transportation volume increases, while taking into account the need to save land resources and protect the natural environment, a large number of bridges have emerged. The number of bridges currently under construction and built in my country is already considerable. With the increasing number of bridges being built, the protection and reinforcement of bridges is particularly important, especially since many areas in my country are prone to earthquakes. The damage caused by earthquakes to bridges and the economic losses are huge.

[0003] The main forms of damage to bridges caused by earthquakes include support damage, fallen beams, pier pile foundation damage, and collision damage between beams, etc. These damages leave hidden dangers to people's life safety, and the reconstruction work after the damage is also difficult. Filling the gap will bring huge economic losses, so certain protective measures need to be taken to make the bridge have a certain earthquake resistance.

[0004] In order to achieve the above purpose, most places in my country have taken measures to install reinforced concrete blocks on both sides of the top of the pier cap beam in order to limit the large displacement of the beam body in the transverse direction of the bridge. However, the defects of this method are obvious. The rigid collision between the beam body and the block can easily cause local damage, and the damage to the block itself is also huge. Moreover, there is not much constraint on the vertical and longitudinal displacement of the beam body, and there is still a large risk of beam falling.

[0005] In view of the above shortcomings, it is necessary to design and develop a new type of bridge seismic block structure, which can not only limit the displacement of the upper beam in multiple directions when an earthquake occurs, but also effectively buffer the energy consumption, limit the large displacement of the beam and reduce the damage to the block itself. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention designs and develops a multi-damping buffering energy-absorbing bridge seismic block structure. In the invention, multiple damper structures and the collision ball in the middle work together to buffer and consume seismic energy; limit the displacement between the beam and the pier in the transverse, longitudinal and vertical directions of the bridge, and effectively prevent the beam from falling; convert the rigid collision between the bridge and the block into a flexible collision inside the seismic block structure of the bridge, and transfer the collision between the beams to the block, which not only reduces the damage to the bridge caused by the earthquake, but also reduces the damage to the block itself.

[0007] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0008] A multiple damping buffering energy-absorbing bridge seismic block structure comprises a steel corbel, a block structure, a steel baffle plate and a damper structure, wherein the steel corbel is fixed above the side wall of the pier by steel corbel bolts; the block structure is arranged between the steel corbel and the main beam; the steel baffle plate is fixed to the bottom of the main beam by steel baffle plate bolts, and four steel baffle plates are respectively connected to the four side walls of the block structure by the damper structure; and the two ends of the damper structure are respectively connected to the block structure and the steel baffle plate by damper side plate bolts.

[0009] The steel corbel comprises a steel corbel top plate, a steel corbel side plate and a steel corbel web plate, wherein the steel corbel side plate is provided with threaded holes for steel corbel bolts to pass through; two steel corbel web plates are vertically fixed below the steel corbel top plate, and the outer walls of the steel corbel side plates are respectively connected to the steel corbel top plate and one side of the steel corbel web plate.

[0010] The block structure includes a square block, a steel column, a collision ball and a steel base plate. The steel base plate is fixed to the upper surface of the steel corbel top plate by steel base plate bolts. The square block is fixed in the middle position of the upper surface of the steel base plate. The square block is a hollow square structure with an open top. The steel column is arranged in the middle of the inner cavity of the square block, and its top is fixedly connected to the bottom of the main beam. The steel column is a cylindrical structure. The collision ball is placed between the inner wall of the square block and the outer wall of the steel column. Rubber buffer pads are provided on the inner wall of the square block and the outer wall of the steel column.

[0011] The steel baffle plate includes a steel baffle plate top plate, a steel baffle plate side plate and a steel baffle plate web plate. The steel baffle plate top plate and the steel baffle plate side plate are both provided with a plurality of bolt holes. The steel baffle plate top plate is fixed to the bottom of the main beam by steel baffle plate bolts. The steel baffle plate top plate is horizontally arranged, and vertically arranged steel baffle plate side plates are fixed at the edge of its lower surface. Two parallel steel baffle plate web plates are fixed between the steel baffle plate top plate and the steel baffle plate side plates, and the longitudinal section of the steel baffle plate web is a right-angled trapezoid.

[0012] The damper structure includes a damper body, a rotating hinge support, an anti-pullout block, a fixed steel plate, a connecting block and a damper side plate. The damper body is a viscous damper. Rotary hinge connection holes are provided at both ends of the damper body, which are respectively hingedly connected to the rotating hinge supports on both sides; the damper side plates on both sides of the damper structure are respectively connected to the square block and the steel baffle side plate through the damper side plate bolts; the anti-pullout block body is in an "L" shape, and its tail end is an arc shape. The two anti-pullout blocks are relatively Fixed on the damper side plate; the fixed steel plate and the connecting block are arranged between the two anti-pull-out blocks, and in the natural state, a gap is provided between the fixed steel plate and the anti-pull-out block; one side of the connecting block is fixedly connected to the damper side plate, and the other side is fixedly connected to one side of the fixed steel plate, and the other side of the fixed steel plate is laterally connected with a rotating hinge support, and the width of the rotating hinge support is smaller than the tail end spacing of the two anti-pull-out blocks; the length of the fixed steel plate is greater than the tail end spacing of the two pull-out blocks.

[0013] The collision ball is in a spherical structure, with a cylindrical groove on the top, the inner diameter of which is larger than the outer diameter of the steel column; the collision ball is in a free moving state, and the movable distance between its outer side and the square stopper is larger than the movable distance between its inner side and the steel column.

[0014] The collision ball is made of polyurethane rubber (UR).

[0015] The connecting block is made of low yield strength steel.

[0016] The beneficial effects of the present invention are:

[0017] 1) The present invention can effectively consume earthquake energy, reduce earthquake damage to the bridge, and reduce damage to the structure itself. On the one hand, the damper structure is arranged in four directions of the square block, which not only has the effect of multiple damping together, consuming most of the earthquake energy, but also reduces the effect of the earthquake on each damper structure and reduces the damage to the damper structure itself; in addition, the damper body adopts a viscous damper, which will not provide additional rigidity to the bridge during an earthquake, thereby protecting the bridge itself; on the other hand, the collision ball is made of polyurethane rubber, which can vibrate between the square block and the steel column during an earthquake to absorb earthquake energy.

[0018] 2) The present invention can limit the position in three directions and effectively prevent the beam from falling. A rotating hinge support is welded horizontally on the fixed steel plate. A certain gap is left between the damper body and the anti-pullout block, which can rotate in coordination with the connecting block to adapt to the relative rotation and vertical relative displacement of the beam body. The square block and steel baffle connected to the viscous damper structure are both limited in the excessive axial displacement of the damper. At the same time, the damper structure is arranged in four directions of the square block, so that the present invention can limit the relative displacement of the beam body in three directions: longitudinal, transverse and vertical.

[0019] 3) The material of the present invention is low in price, simple in structure, convenient in construction, easy to disassemble and repair, and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 2 This is a layout diagram of the present invention along the bridge direction;

[0022] Figure 3 It is a schematic diagram of the structure of the damper of the present invention;

[0023] Figure 4 A working state diagram of the damper structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the top structure of the present invention.

[0026] In the figure: 1 steel corbel, 2 block structure, 3 steel baffle, 4 square block, 5 steel column, 6 collision ball, 7 steel bottom plate, 8 damper structure, 9 steel corbel top plate, 10 steel corbel side plate, 11 steel corbel web, 12 steel corbel bolts, 13 steel baffle top plate, 14 steel baffle side plate, 15 steel baffle web, 16 steel baffle bolts, 17 steel bottom plate bolts, 18 rubber buffer pad, 19 damper body, 20 rotating hinge support, 21 anti-pullout block, 22 fixed steel plate, 23 connecting block, 24 damper side plate, 25 damper side plate bolts, 26 main beam, 27 second main beam, 28 expansion joint, 29 bridge pier, 30 bridge movable bearing, 31 bridge fixed bearing. DETAILED DESCRIPTION

[0027] The present invention is further described below

[0028] See also Figure 1-6

[0029] The present invention discloses a multi-damping buffering energy-absorbing bridge seismic block structure, comprising a steel corbel 1, a block structure 2, a steel baffle 3 and a damper structure 8; the steel corbel 1 is fixed above the side wall of the pier 29 by a steel corbel bolt 12; the block structure 2 is arranged between the steel corbel 1 and the main beam 26; the steel baffle 3 is fixed to the bottom of the main beam 26 by a steel baffle bolt 16, and four steel baffles 3 are respectively located on the four sides of the block structure 2; the two ends of the damper structure 8 are respectively connected to the block structure 2 and the steel baffle 3 by damper side plate bolts 25. In this case, the damper structure 8 is arranged in four directions of the block structure 2, so that the present invention can limit the relative displacement of the beam body in three directions: longitudinal direction, transverse direction and vertical direction.

[0030] The steel corbel 1 is welded together by a steel corbel top plate 9, a steel corbel side plate 10 and a steel corbel web plate 11. The steel corbel side plate 10 is provided with threaded holes for the steel corbel bolts 12 to pass through, so as to fix the steel corbel 1 to the side of the top of the pier 29 near the movable bearing 30 of the bridge. Two steel corbel web plates 11 are vertically welded under a steel corbel top plate 9, and a steel corbel side plate 10 is welded on the side, and the three are positioned perpendicular to each other.

[0031] The block structure 2 includes a square block 4, a steel column 5, a collision ball 6 and a steel bottom plate 7. The steel bottom plate 7 is fixed to the upper surface of the steel corbel top plate 9 by a steel bottom plate bolt 17. The square block 4 is welded and fixed to the middle position of the upper surface of the steel bottom plate 7. The external shape of the square block 4 is a rectangular parallelepiped with equal length and width, and a cubic groove is opened on the upper part. The steel column 5 is welded and fixed to the bottom of the main beam 26, and is located in the middle of the groove of the square block 4. The cross section of the steel column 5 is circular. The collision ball 6 is placed between the square block 4 and the steel column 5. A layer of rubber buffer pad 18 is set on the inner wall of the groove of the square block 4 and the outer wall of the steel column 5.

[0032] The steel baffle plate 3 includes a steel baffle plate top plate 13, a steel baffle plate side plate 14 and a steel baffle plate web 15. A plurality of bolt holes are provided on the steel baffle plate top plate 13 and the steel baffle plate side plate 14. The steel baffle plate top plate 13 is fixed to the bottom of 26 by steel baffle plate bolts 16. A vertical steel baffle plate side plate 14 is welded at the edge of the lower surface of the horizontal steel baffle plate top plate 13. Two parallel steel baffle plate webs 15 are welded between the steel baffle plate top plate 13 and the steel baffle side plates 14. The longitudinal section of the steel baffle plate web 15 is a right-angled trapezoid.

[0033] The damper structure 8 includes a damper body 19, a rotating hinge support 20, an anti-pullout block 21, a fixed steel plate 22, a connecting block 23 and a damper side plate 24. In order to enable the damper structure 8 to provide greater damping without providing additional stiffness during an earthquake, the damper body 19 is a viscous damper. Rotary hinge connection holes are opened on both sides of the damper body 19, which are respectively hingedly connected to the rotating hinge supports 20 on both sides; screw holes are opened on the damper side plates 24, and the damper side plates 24 on both sides of the damper structure 8 are respectively connected to the square block 4 and the steel baffle side plates 14 through the damper side plate bolts 25; the main body shape of the anti-pullout block 21 is "L"-shaped, and its tail end is arc-shaped. The two anti-pullout blocks 21 are welded to the damper side plates 24 relatively; the fixed steel plate The plate 22 and the connecting block 23 are located in the space surrounded by the anti-pull-out blocks 21 on both sides, and in the natural state, a certain distance of gap is provided between the fixed steel plate 22 and the anti-pull-out block 21 to provide rotation space for the damper body 19 and the connecting block 23; the connecting block 23 is welded with the damper side plate 24 on one side and the fixed steel plate 22 on the other side, and a rotating hinge support 20 is horizontally welded on the fixed steel plate 22, and the width of the rotating hinge support 20 is slightly smaller than the tail end spacing of the two anti-pull-out blocks 21; the purpose of horizontal welding is that when the upper main beam 26 simultaneously undergoes transverse and longitudinal displacements, the damper body 19 can rotate through the rotating hinge support 20, so that the stress state of the damper body 19 is still maintained in the axial direction, so that the overall structure is well stressed and not easily damaged by shear.

[0034] The collision ball 6 is shaped like a sphere with a cylindrical groove on the upper part. The circular radius of the cross-section of the opening groove of the collision ball 6 is larger than the circular radius of the cross-section of the steel column 5. The collision ball 6 is in a freely movable state, and the movable distance between the outer side of the collision ball 6 and the square stopper 4 is larger than the movable distance between the inner side and the steel column 5.

[0035] The collision ball 6 is made of polyurethane rubber (UR).

[0036] The material used for the connection block 23 is low yield strength steel, so that it can cooperate with the shape change of the damper structure 8 during an earthquake to undergo a larger yield deformation, cooperate with the rotation and consume part of the earthquake energy.

[0037] Working principle: During an earthquake, the main beam 26 and the pier 29 undergo relative displacement in the longitudinal direction of the bridge. The two damper structures 8 located in the longitudinal direction of the bridge bear axial tensile pressure respectively, generating greater damping. At the same time, the two damper structures 8 located in the transverse direction of the bridge rotate, also providing a certain tensile force, thereby limiting the relatively large displacement of the main beam 26. At the same time, multiple dampers work together to consume a large amount of seismic energy (the same principle applies when the beam body undergoes relative displacement in the transverse direction of the bridge); if the main beam 26 and the pier 29 undergo vertical relative displacement, the damper body 19 can rotate together with the connecting block 23, causing the connecting block to yield and deform, consuming seismic energy, and due to the limiting effect of the anti-pullout block 21, the main beam 23 is prevented from undergoing a large relative displacement in the vertical direction; in addition, when the main beam 26 and the pier 29 undergo relative displacement, the steel column 5 and the square block 4 are driven to move relative to each other, thereby causing the collision ball 6 to vibrate inside the groove, absorbing more seismic energy, and reducing the damage of the pier 29 and the main beam 26 caused by the earthquake. In order to make the collision ball 6 absorb more energy during vibration, the material used is polyurethane rubber, which has the advantages of good wear resistance, good elasticity, and good buffering and shock absorption effect. In addition, a layer of rubber buffer pad 18 is provided on the inner wall of the groove of the square stopper 4 and the outer wall of the steel column 5, so that the collision of the collision ball 6 on the steel column 5 and the inner wall of the groove of the square stopper 4 is a flexible collision, which reduces the damage to the collision ball 6 itself and the stopper structure 2.

[0038] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A multiple damping buffer energy dissipation bridge seismic stopper structure, characterized in that: It includes a steel corbel, a block structure, a steel baffle and a damper structure. The steel corbel is fixed above the side wall of the pier by steel corbel bolts; the block structure is arranged between the steel corbel and the main beam; the steel baffle is fixed to the bottom of the main beam by steel baffle bolts, and four steel baffles are respectively connected to the four side walls of the block structure by the damper structure; the two ends of the damper structure are respectively connected to the block structure and the steel baffle by the damper side plate bolts; the block structure includes a square block, a steel column, a collision ball and a steel bottom plate The steel bottom plate is fixed to the upper surface of the steel corbel top plate by steel bottom plate bolts; the square stopper is fixed to the middle position of the upper surface of the steel bottom plate; the square stopper is a hollow square structure with an open top; the steel column is arranged in the middle of the inner cavity of the square stopper, and its top is fixedly connected to the bottom of the main beam; the steel column is a cylindrical structure; the collision ball is placed between the inner wall of the square stopper and the outer wall of the steel column; rubber buffer pads are provided on the inner wall of the square stopper and the outer wall of the steel column.

2. The multiple damping buffer energy dissipation bridge seismic stopper structure according to claim 1 is characterized by: The steel baffle plate includes a steel baffle plate top plate, a steel baffle plate side plate and a steel baffle plate web plate. The steel baffle plate top plate and the steel baffle plate side plate are both provided with a plurality of bolt holes. The steel baffle plate top plate is fixed to the bottom of the main beam by steel baffle plate bolts. The steel baffle plate top plate is horizontally arranged, and vertically arranged steel baffle plate side plates are fixed at the edge of its lower surface. Two parallel steel baffle plate web plates are fixed between the steel baffle plate top plate and the steel baffle plate side plates, and the longitudinal section of the steel baffle plate web is a right-angled trapezoid.

3. The multiple damping buffer energy dissipation bridge seismic stopper structure according to claim 2 is characterized by: The damper structure includes a damper body, a rotating hinge support, an anti-pullout block, a fixed steel plate, a connecting block and a damper side plate. The damper body is a viscous damper. Rotary hinge connection holes are provided at both ends of the damper body, which are respectively hingedly connected to the rotating hinge supports on both sides; the damper side plates on both sides of the damper structure are respectively connected to the square block and the steel baffle side plate through the damper side plate bolts; the anti-pullout block body is in an "L" shape, and its tail end is an arc shape. The two anti-pullout blocks are relatively Fixed on the damper side plate; the fixed steel plate and the connecting block are arranged between the two anti-pull-out blocks, and in the natural state, a gap is provided between the fixed steel plate and the anti-pull-out block; one side of the connecting block is fixedly connected to the damper side plate, and the other side is fixedly connected to one side of the fixed steel plate, and the other side of the fixed steel plate is laterally connected with a rotating hinge support, and the width of the rotating hinge support is smaller than the tail end spacing of the two anti-pull-out blocks; the length of the fixed steel plate is greater than the tail end spacing of the two pull-out blocks.

4. The multiple damping buffer energy dissipation bridge seismic stopper structure according to claim 3 is characterized by: The collision ball is in a spherical structure, with a cylindrical groove on the top, the inner diameter of which is larger than the outer diameter of the steel column; the collision ball is in a free moving state, and the movable distance between its outer side and the square stopper is larger than the movable distance between its inner side and the steel column.

5. The multiple damping buffer energy dissipation bridge seismic stopper structure according to claim 4 is characterized by: The collision ball is made of polyurethane rubber.

6. The multiple damping buffer energy dissipation bridge seismic stopper structure according to claim 5 is characterized by: The connecting block is made of low yield strength steel.

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