A collision rotation buffer energy dissipation type bridge seismic stop block structure

Abstract

The present invention relates to the field of bridge seismic technology, and in particular to a collision rotation buffer energy-dissipating bridge seismic block structure, comprising a steel corbel, a rotation mechanism, a steel baffle, a collision cylinder and a steel support, wherein the steel corbel is fixed to the top of the pier side wall by a steel corbel bolt; two steel supports are fixed to the top of the steel corbel, and the top plates at the top of the two steel supports are relatively inclined to form a "V"-shaped entrance for the rotation mechanism to be inserted, and the rotation mechanism is installed on the top of the steel corbel through a third rotation hinge support; the two steel baffles are fixed to the bottom of the main beam by steel baffle bolts, and a gap is provided between the inner wall of the steel baffle and the two collision cylinders at the top of the rotation mechanism. The present invention can limit the excessive displacement of the beam body and the pier along the bridge direction to avoid the beam falling phenomenon; the rigid collision between the beam body and the block is converted into a flexible collision, and a part of the earthquake energy is consumed by the deformation of the collision cylinder and the torsion spring.

Description

Technical Field

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

[0002] my country's economy has grown rapidly in recent years. The country has invested more and more in projects that are beneficial to social development and people's livelihood. Infrastructure work has also developed rapidly. Road traffic construction plays an important role in regional economic development. Bridges are hubs in traffic routes. Once a bridge accident occurs, it will bring a series of economic problems and social effects. Therefore, the safety performance and stability of bridges are what we need to pay attention to and pay attention to.

[0003] my country has more than one million bridges under construction and already built. Bridges are being built in various terrains and regions. However, some regions are located in earthquake-prone areas, which poses great safety risks. Once an earthquake strikes, bridges are easily damaged or even collapsed due to their structural characteristics, which will not only bring huge economic losses, but also threaten people's lives and safety. At the same time, it will form an "island effect", which will bring many difficulties to the rescue work after the earthquake.

[0004] The main damages to bridge structures during earthquakes include the falling off of upper beams, damage to bearings, cracking of pile foundation piers, and collision damage to beams. At present, most bridges in my country have adopted measures to resist earthquakes by installing reinforced concrete blocks on both sides of the top of the pier cap beam. This method can limit the transverse displacement of the upper beam to a certain extent, but it is easy to cause local damage during collisions and has little restraining effect on the longitudinal displacement of the bridge.

[0005] Therefore, it is necessary to design and develop a new type of bridge seismic block structure, which can not only effectively play a seismic role during an earthquake, but also limit the displacement of the upper beam of the bridge along the bridge direction, while reducing the degree of damage to the block itself when it acts. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a collision-rotation buffer energy-absorbing bridge seismic block structure to limit the excessive displacement of the beam and the pier along the bridge direction to avoid the beam falling phenomenon; convert the rigid collision between the beam and the block into a flexible collision, relying on the deformation of the collision cylinder and the torsion spring to consume part of the seismic energy; utilize the friction generated by the sliding displacement of the rotating mechanism when it rotates to absorb the seismic energy as much as possible; increase the number of block structures and disperse the collision positions, thereby reducing the collision force acting on each block structure, reducing the local damage of the block structure, and protecting the device itself.

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

[0008] The present invention discloses a collision rotation buffer energy-absorbing bridge seismic block structure, comprising a steel corbel, a rotating mechanism, a steel baffle, a collision cylinder and a steel support, wherein the steel corbel is fixed above the side wall of the pier by steel corbel bolts; two of the steel supports are fixed to the top of the steel corbel, and the top plates at the top ends of the two steel supports are relatively inclined to form a "V"-shaped entrance for inserting the rotating mechanism, and the rotating mechanism is installed on the top of the steel corbel through a third rotating hinge support; the two steel baffles are fixed to the bottom of the main beam by steel baffle bolts, and a gap is provided between the inner wall of the steel baffle and the two collision cylinders at the top of the rotating mechanism.

[0009] The steel corbel comprises a steel corbel top plate, a steel corbel side plate, a steel corbel bottom plate and a steel corbel web plate, wherein the steel corbel side plate is provided with bolt holes for steel corbel bolts to pass through; the steel corbel top plate and the steel corbel bottom plate are horizontally placed, and two parallel steel corbel web plates are vertically welded therebetween; the outer walls of the steel corbel side plates are respectively connected to the steel corbel top plate, the steel corbel bottom plate and one side of the steel corbel web plate.

[0010] The rotating mechanism includes a rotating steel plate, a second rotating steel plate and two groups of internal buffer structures. The rotating steel plate and the second rotating steel plate are combined into a "V"-shaped structure, and the bottom ends of the two are hinged to the third rotating hinge support through a rotating hinge; the internal buffer structure includes a connecting rod, a rotating hinge support, a second rotating hinge support, an upper cover plate, a corrugated friction plate, and a lower cover plate. The second rotating hinge support is fixed to the middle part of the inner wall of the rotating steel plate and the second rotating steel plate, and the lower cover plate is fixed to the upper part of the inner wall of the rotating steel plate and the second rotating steel plate. One end of the two connecting rods is hinged to the second rotating hinge support, and the other end is hinged to the upper cover plate through the rotating hinge support. Corrugated friction plates are provided on the outer walls of the upper and lower cover plates, and the two corrugated friction plates are in close contact.

[0011] The length of the upper cover plate is smaller than the length of the lower cover plate.

[0012] Two pin heads are fixed on both sides of the bottom end of the second rotating steel plate, a second pin head is fixed in the middle of the bottom end of the rotating steel plate, a torsion spring is arranged between the pin head and the second pin head, and two openings for inserting the torsion arms at the ends of the torsion spring are respectively arranged at the bottom of the rotating steel plate and the second rotating steel plate, and the rotating hinge passes through the through hole of the side wall of the pin head, the through hole of the side wall of the second pin head and the torsion spring axis in sequence and is hinged to the third rotating hinge support.

[0013] The collision cylinder includes an outer cylinder, a connecting block, and an inner cylinder. The two outer cylinders are respectively arranged on the top of the rotating steel plate and the second rotating steel plate. Under normal conditions, the inner cylinder is arranged inside the outer cylinder, and the two are coaxial. Four connecting blocks are installed at equal angles between the outer cylinder and the inner cylinder. The material used for the entire collision cylinder is low yield strength steel.

[0014] The steel baffle plate includes a steel baffle plate top plate, a steel baffle plate side plate, a collision block, and a steel baffle plate web plate. The steel baffle plate top plate is horizontally arranged and fixed to the bottom of the main beam by steel baffle plate bolts, 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. The longitudinal section of the steel baffle plate web plate is a right-angled trapezoid, the inner plane of the collision block is fixedly connected to the steel baffle plate side plate, and its outer impact surface is an arc surface.

[0015] The steel support includes a steel support top plate, a steel support column, and a steel support bottom plate. The steel support bottom plate is fixed to the upper surface of the steel bracket top plate by steel support bolts. The steel support top plate is placed obliquely and is parallel to the rotating steel plate. A layer of rubber pad is fixed on the side of the steel support top plate close to the rotating steel plate, and a steel support column is fixed between the other side and the upper surface of the steel support bottom plate. The inner and outer sides of the longitudinal section of the steel support column are arc-shaped with the same center.

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

[0017] 1) The collision cylinder is divided into inner and outer cylinders and is made of low yield strength steel, so that its collision effect is a flexible collision, resulting in a large deformation, thereby consuming seismic energy; the arc-shaped design of the edge of the collision block can effectively meet the collision between the collision block and the collision cylinder is a non-uniform collision with uncertain collision position.

[0018] 2) Corrugated friction plates are set on the planes where the upper cover plate and the lower cover plate contact each other. When the two connecting rods rotate relative to each other, the upper cover plate will slide relative to the lower cover plate, absorbing part of the seismic energy through friction. The setting of the torsion spring hinders the rotation of the rotating steel plate to a certain extent, while converting part of the seismic energy into elastic potential energy, and can make the structure have a reset function.

[0019] 3) The arrangement of the steel supports on both sides to limit the maximum rotation angle of the rotating steel plate enables the present invention to effectively limit the displacement along the bridge direction between the upper beam and the bridge pier.

[0020] 4) The present invention has a simple structure, convenient construction and good earthquake resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a layout diagram of the present invention along the bridge direction;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 4 It is a detailed diagram of the rotating mechanism of the present invention;

[0025] Figure 5 It is a detailed structural diagram of the rotating steel plate connection of the present invention;

[0026] Figure 6 It is a schematic diagram of the rotating steel plate connection method of the present invention.

[0027] In the figure: 1 steel bracket, 2 rotating mechanism, 3 steel baffle, 4 collision cylinder, 5 steel support, 6 rotating steel plate, 7 second rotating steel plate, 8 connecting rod, 9 rotating hinge support, 10 second rotating hinge support, 11 upper cover plate, 12 corrugated friction plate, 13 lower cover plate, 14 third rotating hinge support, 15 steel support top plate, 16 steel support column, 17 steel support bottom plate, 18 steel support bolt, 19 rubber pad, 20 steel baffle top plate, 21 steel baffle side plate, 22 collision stopper, 23 steel baffle web plate, 24 steel baffle bolt, 25 steel corbel top plate, 26 steel corbel side plate, 27 steel corbel bottom plate, 28 steel corbel web plate, 29 steel corbel bolt, 30 outer cylinder, 31 connecting block, 32 inner cylinder, 33 pin head, 34 second pin head, 35 torsion spring, 36 opening, 37 main beam, 38 second main beam, 39 expansion joint, 40 bridge pier, 41 movable bridge bearing, 42 fixed bridge bearing. DETAILED DESCRIPTION

[0028] The present invention is further described below:

[0029] See also Figure 1-6 ,

[0030] The present invention discloses a collision rotation buffer energy dissipation type bridge seismic stopper structure, comprising a steel corbel 1, a rotating mechanism 2, a steel baffle 3, a collision cylinder 4 and a steel support 5, wherein the steel corbel 1 is fixed to the upper side wall of a pier 40 by a steel corbel bolt 29; two of the steel supports 5 are fixed to the top of the steel corbel 1, and top plates 15 at the top ends of the two steel supports 5 are relatively inclined to form a "V"-shaped entrance for inserting the rotating mechanism 2, and the rotating mechanism 2 is installed on the top of the steel corbel 1 by a third rotating hinge support 14; two of the steel baffles 3 are fixed to the bottom of a main beam 37 by steel baffle bolts 24, and a gap is provided between the inner wall of the steel baffle 3 and the two collision cylinders 4 at the top of the rotating mechanism 2, and when the displacement exceeds the gap between the inner wall of the steel baffle 3 and the collision cylinder 4, the collision baffle 22 collides with the collision cylinder 4, and at this instant, due to the impact force, the collision cylinder 4 undergoes a certain deformation, consuming a part of the earthquake energy.

[0031] The steel corbel 1 comprises a steel corbel top plate 25, a steel corbel side plate 26, a steel corbel bottom plate 27 and a steel corbel web plate 28. The steel corbel side plate 26 is provided with bolt holes for steel corbel bolts 29 to pass through. The steel corbel top plate 25 and the steel corbel bottom plate 27 are horizontally placed, and two parallel steel corbel web plates 28 are vertically welded therebetween. The outer walls of the steel corbel side plates 26 are respectively connected to the steel corbel top plate 25, the steel corbel bottom plate 27 and one side of the steel corbel web plate 28.

[0032] The rotating mechanism 2 includes a rotating steel plate 6, a second rotating steel plate 7 and two sets of internal buffer structures. The rotating steel plate 6 and the second rotating steel plate 7 are combined into a "V"-shaped structure, and the bottom ends of the two are hinged to the third rotating hinge support 14 through a rotating hinge; the internal buffer structure includes a connecting rod 8, a rotating hinge support 9, a second rotating hinge support 10, an upper cover plate 11, a corrugated friction plate 12, and a lower cover plate 13. The second rotating hinge support 10 is fixed to the middle of the inner wall of the rotating steel plate 6 and the second rotating steel plate 7. The lower cover plate 13 is fixed to the upper inner wall of the rotating steel plate 6 and the second rotating steel plate 7. One end of the two connecting rods 8 is hinged to the second rotating hinge support 10 and the other end is hinged to the upper cover plate 11 through the rotating hinge support 9. Corrugated friction plates 12 are provided on the outer walls of the upper and lower cover plates, and the two corrugated friction plates 12 are in close contact. When the two sets of internal buffer structures are set, their plane positions are symmetrical, but their spatial positions are staggered to facilitate full rotation between the rotating steel plate 6 and the second rotating steel plate 7.

[0033] The length of the upper cover plate 11 is smaller than that of the lower cover plate 13 to ensure that the distance of friction between the upper cover plate 11 and the lower cover plate 13 is sufficient to generate more friction to consume earthquake energy.

[0034] Two pin heads 33 are fixed on both sides of the bottom end of the second rotating steel plate 7, and a second pin head 34 is fixed in the middle of the bottom end of the rotating steel plate 6. A torsion spring 35 is provided between the pin head 33 and the second pin head 34. The bottom of the rotating steel plate 6 and the second rotating steel plate 7 are respectively provided with two openings 36 for inserting the torsion arms at the ends of the torsion spring 35. The rotating hinge passes through the through holes in the side walls of the pin heads 33, the through holes in the side walls of the second pin heads 34 and the axial rear of the torsion spring 35 in sequence and is hinged to the third rotating hinge support 14. During the rotation of the rotating steel plate 6, the torsion spring 35 will exert a reverse elastic force on the rotating steel plate 6 due to torsional deformation, thereby hindering the rotation of the rotating steel plate 6 to a certain extent, and converting part of the seismic energy into elastic potential energy.

[0035] The collision cylinder 4 includes an outer cylinder 30, a connecting block 31, and an inner cylinder 32. The two outer cylinders 30 are respectively arranged on the top of the rotating steel plate 6 and the second rotating steel plate 7. Under normal conditions, the inner cylinder 32 is arranged inside the outer cylinder 30, and the two are coaxial. Four connecting blocks 31 are installed at equal angles between the outer cylinder 30 and the inner cylinder 32. The material used for the entire collision cylinder 4 is low yield strength steel so that it can produce larger deformation during collision and consume seismic energy.

[0036] The steel baffle 3 includes a steel baffle top plate 20, a steel baffle side plate 21, a collision block 22, and a steel baffle web 23. The steel baffle top plate 20 is horizontally arranged and fixed to the bottom of the main beam 37 by steel baffle bolts 24. A vertically arranged steel baffle side plate 21 is fixed at the edge of its lower surface. Two parallel steel baffle webs 23 are fixed between the steel baffle top plate 20 and the steel baffle side plates 21. The longitudinal section of the steel baffle web 23 is a right-angled trapezoid. The inner plane of the collision block 22 is fixedly connected to the steel baffle side plate 21, and its outer impact surface is an arc surface to meet the uneven collision of point-to-plane with uncertain collision position under complex vibration of the bridge, which is conducive to the normal operation of the collision cylinder.

[0037] The steel support 5 includes a steel support top plate 15, a steel support column 16, and a steel support bottom plate 17. The steel support bottom plate 17 is fixed to the upper surface of the steel corbel top plate 25 by steel support bolts 18. The steel support top plate 15 is placed obliquely and is parallel to the rotating steel plate 6. A layer of rubber pad 19 is fixed to the side of the steel support top plate 15 close to the rotating steel plate 6, and a steel support column 16 is fixed between the other side and the upper surface of the steel support bottom plate 17. The inner and outer sides of the longitudinal section of the steel support column 16 are arc-shaped with the same center.

[0038] Working principle: During an earthquake, the bridge moves relatively to the left along the upper main beam 37 and the pier 40. When the displacement exceeds the distance between the collision stopper 22 and the collision cylinder 4, the collision stopper 22 collides with the collision cylinder 4. First, at this instant, due to the impact force, the collision cylinder 4 deforms to a certain extent, consuming part of the earthquake energy. When the main beam 37 continues to move relatively, the collision cylinder 4 drives the connected rotating steel plate 6 to start rotating toward the second rotating steel plate 7, and the two connecting rods 8 also start rotating relative to each other, thereby driving the upper cover plate 11 to slide relative to the lower cover plate 13. Corrugated friction plates 12 are provided on the respective planes where the two contact each other, and the friction between the corrugated friction plates 12 further The second rotating steel plate 7 is further supported by the steel support 5, and its rotation is restricted, thereby limiting the displacement of the upper main beam 37 in the direction of the bridge, and providing support for the mutual rotation of the overall structure. When the upper main beam 37 begins to move relative to the bridge pier 40 to the right, the device can be reset due to the restoring force of the torsion spring 35 itself, and then the above-mentioned collision energy dissipation process of the acting components is reversed, thereby achieving the effect of bridge earthquake resistance.

[0039] 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 collision and rotation buffer energy dissipation bridge anti-seismic block structure, characterized by: It includes a steel corbel, a rotating mechanism, a steel baffle, a collision cylinder and a steel support, wherein the steel corbel is fixed to the top of the pier side wall by steel corbel bolts; the two steel supports are fixed to the top of the steel corbel, and the steel support top plates at the top of the two steel supports are relatively inclined, and a "V"-shaped entrance for the insertion of the rotating mechanism is formed between the two steel support top plates, and the rotating mechanism is installed on the top of the steel corbel through a third rotating hinge support; the two steel baffles are fixed to the bottom of the main beam by steel baffle bolts, and a gap is provided between the inner wall of the steel baffle and the two collision cylinders at the top of the rotating mechanism; the rotating mechanism includes a rotating steel plate, a second rotating steel plate and two groups of internal buffer structures, the rotating steel plate and the second rotating steel plate are combined into a "V"-shaped structure, and the bottom ends of the two are hinged to the third rotating hinge support through a rotating hinge; the internal buffer structure includes a connecting rod, a rotating hinge support, a second rotating hinge support, an upper cover plate, a wave The cam is connected with the second rotating steel plate by the support frame, and the cam is connected with the support frame by the support frame. The cam is connected with the second rotating steel plate by the support frame. The cam is connected with the second rotating steel plate by the support frame. The cam is connected with the second rotating steel plate by the support frame.

2. The collision and rotation buffer energy dissipation bridge anti-seismic stopper structure according to claim 1 is characterized by: The steel corbel comprises a steel corbel top plate, a steel corbel side plate, a steel corbel bottom plate and a steel corbel web plate, wherein the steel corbel side plate is provided with bolt holes for steel corbel bolts to pass through; the steel corbel top plate and the steel corbel bottom plate are horizontally placed, and two parallel steel corbel web plates are vertically welded therebetween; the outer walls of the steel corbel side plates are respectively connected to the steel corbel top plate, the steel corbel bottom plate and one side of the steel corbel web plate.

3. The collision and rotation buffer energy dissipation bridge anti-seismic stopper structure according to claim 2 is characterized by: The collision cylinder includes an outer cylinder, a connecting block, and an inner cylinder. The two outer cylinders are respectively arranged on the top of the rotating steel plate and the second rotating steel plate. Under normal conditions, the inner cylinder is arranged inside the outer cylinder, and the two are coaxial. Four connecting blocks are installed at equal angles between the outer cylinder and the inner cylinder. The material used for the entire collision cylinder is low yield strength steel.

4. The collision and rotation buffer energy dissipation bridge anti-seismic stopper structure according to claim 3 is characterized by: The steel baffle plate includes a steel baffle plate top plate, a steel baffle plate side plate, a collision block, and a steel baffle plate web plate. The steel baffle plate top plate is horizontally arranged and fixed to the bottom of the main beam by steel baffle plate bolts, 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. The longitudinal section of the steel baffle plate web plate is a right-angled trapezoid, the inner plane of the collision block is fixedly connected to the steel baffle plate side plate, and its outer impact surface is an arc surface.

5. The collision and rotation buffer energy dissipation bridge anti-seismic stopper structure according to claim 4 is characterized by: The steel support includes a steel support top plate, a steel support column, and a steel support bottom plate. The steel support bottom plate is fixed to the upper surface of the steel corbel top plate by steel support bolts. The steel support top plate is tilted and parallel to the rotating steel plate and the second rotating steel plate respectively. A layer of rubber pad is fixed to the steel support top plate on one side close to the rotating steel plate, and a steel support column is fixed between the other side and the upper surface of the steel support bottom plate. The inner and outer side edges of the longitudinal section of the steel support column are concentric circular arcs.

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