A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation and its construction method

Abstract

The present invention relates to a bridge vibration isolation layer power generation system based on cutting magnetic induction lines for power generation and its construction method, belonging to the field of bridge bearing power generation. The vibration isolation layer is installed between the bearing and the pier. The vibration isolation layer is composed of an ultra-high toughness cement-based composite elliptical honeycomb structure filled with high elastic rubber. The honeycomb structure includes a number of interconnected cells. Each cell is provided with an elliptical opening inside, and the inside is filled with high elastic rubber. A strong magnet is placed on each side of the vibration isolation layer. The surface of the high elastic rubber in each elliptical opening is wrapped with a metal coil. Each metal coil is connected by a wire to form a circuit. Multiple circuits with metal coils are connected in parallel and connected to a power storage power supply through a circuit protection system. The present invention sets a vibration isolation layer under the original bridge bearing, improving the vertical shock absorption and energy absorption characteristics of the bridge. At the same time, metal coils are provided in the vibration isolation layer, which can move by cutting magnetic induction lines during the vibration of the bridge, thereby generating electricity, improving the resource utilization rate, and saving energy, protecting the environment, and being green and low-carbon.

Description

Technical Field

[0001] The present invention relates to a bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation and a construction method thereof, belonging to the technical field of bridge bearing power generation. Background Art

[0002] Nowadays, with the development and progress of our society, in order to meet the needs of increasingly heavy transportation, the demand for bridge construction is also increasing continuously. Statistical data from the Ministry of Transport of China shows that there are currently about 500,000 bridges of various types in our country, and the number of bridges under construction each year reaches as many as 10,000.

[0003] With the increasing improvement of people's living standards, the number of automobiles in our country is increasing more and more, and the traffic flow on bridges is constantly increasing. Motor vehicles traveling on bridges cause the bridges to vibrate frequently, "hiding" a large amount of energy that is ignored. With the increasing attention to environmental protection awareness in recent years and the strong advocacy of sustainable development internationally, as well as the dual carbon goals of "carbon neutrality" and "carbon peak" proposed by our country, developing new clean and environment-friendly energy is the common goal of all mankind. Therefore, inventing a new energy technology that is clean, environment-friendly, safe, controllable, and easy to use has important significance. Currently, the existing technology for generating electricity using bridge vibration is piezoelectric power generation technology.

[0004] Currently, the bridge isolation bearings that are more commonly used are mainly laminated steel plate rubber bearings, such as lead core rubber bearings, high elastic rubber bearings, etc. The vertical stiffness of the lead core rubber isolation bearing is very large, often hundreds or even thousands of times that of the horizontal stiffness. Therefore, it can only reduce the response of the upper structure to horizontal vibrations, and has little isolation effect on vertical vibrations, and there is even a possibility of amplification.

[0005] Therefore, how to provide the function of vertical vibration isolation and shock absorption for bridges, solve the problem that it is difficult to take into account both horizontal shock absorption and vertical shock absorption when using existing bridge isolation devices, and at the same time use the vehicle load vibration to generate electricity, convert this "vibration" into the movement of cutting magnetic induction lines, and apply this technology to the power generation field is the problem to be solved by the present invention. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the present invention provides a bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation and a construction method thereof. An isolation layer is provided under the original bridge bearing, which improves the vertical shock absorption and energy absorption characteristics of the bridge; at the same time, a metal coil is provided in the isolation layer, which can cut the magnetic induction lines during the vibration of the bridge, and then generate electricity, improving the resource utilization rate, energy conservation, environmental protection, and green and low-carbon.

[0007] The present invention adopts the following technical solutions:

[0008] A bridge support vibration isolation layer power generation system based on cutting magnetic flux lines for power generation, comprising a vibration isolation layer installed between the support and the top surface of the bridge pier;

[0009] The seismic isolation layer is composed of an elliptical honeycomb structure of ultra-high toughness cement-based composite material filled with high-elastic rubber. The honeycomb structure includes a plurality of cells connected as one body. An elliptical opening is provided inside the cell. The elliptical opening is filled with high-elastic rubber. The major axis:minor axis ratio of the elliptical opening is 5:3.

[0010] A strong magnet is placed on each side of the seismic isolation layer (a magnetic field is generated between the two strong magnets), and the high-elastic rubber surface in each elliptical opening is wrapped with a metal coil. Each metal coil is connected with a wire to form a loop. Multiple loops with metal coils are connected in parallel and connected to the power storage power supply through a circuit protection system.

[0011] In the above-mentioned elliptical honeycomb structure, an ultra-high-toughness cement-based composite material is used as the matrix material. When the ultra-high-toughness cement-based composite material is subjected to external loads, the presence of fibers makes the cells have a crack bridging effect, so that the individual cells have super strong load-bearing capacity, displacement ductility, deformation capacity and energy absorption capacity under pressure;

[0012] Compared with circular openings and hexagonal openings, elliptical openings have strong energy absorption capacity and better seismic energy absorption effect;

[0013] Filling the elliptical opening with high-damping rubber has three functions. First, it delays the cracking during the stress process, improves the ductility and deformation capacity of the elliptical honeycomb structure of the ultra-high toughness cement-based composite material, prevents the cell from deforming too much to a certain extent, and can quickly return to its original position during vibration; second, it improves the strain hardening capacity of the honeycomb structure; third, high-damping rubber has high elasticity and viscoelasticity. Compared with cement-based materials, high-damping rubber has large elastic deformation and small elastic modulus. The hysteresis curve characteristics of high-damping rubber (load-deformation curve) are full and the energy consumption is significant, providing good shock absorption and energy absorption.

[0014] The present invention installs two groups of strong magnets with different electrodes on both ends of the seismic isolation layer. The vertical load vibration generated by vehicles, especially large trucks, drives the metal coils inside the honeycomb structure of the seismic isolation layer to vibrate vertically and cut the set strong magnetic field to generate induced electromotive force. Several metal coils are connected in parallel to jointly cut the magnetic lines of force to achieve the required current value. The power generation device is used to regenerate energy, improve resource utilization, save energy, be environmentally friendly, and be green and low-carbon.

[0015] Preferably, the elliptical honeycomb structure of the ultra-high toughness cementitious composite material is prepared by a mold made of high-elastic rubber. The mold is a rectangular structure, and its size is adapted to the size of the seismic isolation layer. The bottom surface of the mold is closed, and the upper surface is open. A plurality of elliptical columns are evenly arranged on the bottom surface of the mold. The plurality of elliptical columns are arranged in multiple rows and columns, and the major axes of the elliptical cross-sections of adjacent elliptical columns are perpendicular to each other.

[0016] Preferably, the material of the elliptical column is also high-elastic rubber, and the ratio of the major axis to the minor axis of the elliptical column is 5:3.

[0017] Preferably, the elliptical column is detachably installed on the bottom surface of the mold to facilitate line connection.

[0018] Preferably, a bearing pad stone is provided at the upper support position of the pier cap of the pier. The bearing pad stone is a short reinforced concrete column, which can facilitate the future replacement of the bearing and set the pad stone to leave a position for the jack, and at the same time is convenient for adjusting the errors caused by the construction of the bridge pier and the bridge deck; the concrete grade of the bearing pad stone is not less than C40, the height of the bearing pad stone should consider the convenience of installation, maintenance and replacement of the bearing when necessary, and the height difference at the four corners of the top surface of the bearing pad stone shall not be greater than 2 mm.

[0019] Preferably, the bearing is a lead rubber bearing. The lead rubber bearing includes an upper connecting steel plate, an upper embedded steel plate, rubber, a lead core, a lower connecting steel plate and a lower embedded steel plate. The upper sleeve anchor rod passes through the upper connecting steel plate and the upper embedded steel plate and is anchored on the bridge deck. The lower sleeve anchor rod passes through the lower connecting steel plate, the lower embedded steel plate, the seismic isolation layer and the bearing pad stone and is anchored on the bridge pier. When prefabricating the shock-absorbing bearing, anchor bolt holes shall be reserved at the bearing pad stone part on the top surface of the bridge pier. The deviation of the center and diagonal position of the reserved anchor bolt holes shall not exceed 10 mm.

[0020] The seismic isolation layer can be arranged at the bottom of the lead rubber bearing and connected in series with the original lead rubber bearing to make up for each other's advantages and form a three-dimensional bearing seismic isolation system with appropriate stiffness and damping performance in three directions, which can effectively reduce the influence of vertical vibration on the bridge structure.

[0021] Preferably, 4 layers of mesh steel bars are added to the concrete at the bottom of the bridge deck and the top of the bridge pier connected to the bearing. The reinforcement layout range is larger than the size of the bearing. Preferably, the diameter of the mesh steel bar is ф12 mm, the grid is 100 mm × 100 mm, and the layer spacing is 100 mm; the mesh steel bars at the reserved anchor bolt holes can be cut off, and auxiliary steel bars with the same diameter are added at the hole edge.

[0022] Preferably, the strong magnet uses a neodymium magnet, and is plated with a layer of epoxy resin to prevent corrosion.

[0023] Preferably, the circuit protection system includes a rectifier bridge and a short-circuit protection module. Preferably, the model of the rectifier bridge is KBU803, and the model of the short-circuit protection module is CHNT RT28-32 32A.

[0024] Since the speed at which the seismic isolation layer cuts the magnetic field is random and the direction is also changing at all times, the induced current generated also needs to convert alternating current into direct current. That is, the induced current generated needs to pass through a rectifier bridge to convert the alternating current generated by cutting the magnetic field into direct current, and then charge the electricity storage system with the direct current output by the rectifier bridge, so as to provide power for bridge health monitoring equipment or luminous signs of traffic infrastructure;

[0025] The circuit protection system can also include battery overcharge protection and battery over-discharge protection to protect the safety of the circuit; the electricity storage power supply includes two power supplies. The two power supply brackets are provided with a power supply automatic switching controller, and the two power supplies perform interactive charging and discharging. When one power supply is fully charged, the automatic switch can be used to charge the other power supply, and at the same time the other power supply can discharge, achieving the purpose of charging while discharging. For this interactive charging and discharging circuit, the charging and discharging circuit is controlled by a power supply automatic converter. When one power supply is charging, the discharging circuit automatically switches to supply power to the electrical appliance by the other power supply.

[0026] A construction method of the above-mentioned bridge seismic isolation layer power generation system based on cutting magnetic induction lines includes the following steps:

[0027] (1) Prefabrication of honeycomb structure:

[0028] First, modify the mold by soaking it in 1mol / L NaOH solution for 40 - 60 minutes and washing it with clear water multiple times until the pH value of the washing water reaches 7. Modifying the mold is mainly used to improve the interfacial bonding performance between rubber and ultra-high toughness cement-based composites. Because for the honeycomb structure filled with rubber, due to the hydrophobicity of the rubber surface, the interfacial bonding performance between rubber and the cement matrix is weak. Under fatigue load, the first part to be damaged is the cement-rubber interface transition zone;

[0029] After the surface of high-damping rubber is modified with NaOH, its hydrophilic groups can form a strong bond with the cement matrix, thereby improving the rubber-cement matrix interfacial performance and enhancing the integrity of the elliptical honeycomb structure of ultra-high toughness cement-based composites filled with high-damping rubber. By determining the high-damping rubber modification method, the overall seismic performance of the structure can be improved;

[0030] The modification principle is: Zinc stearate is the main hydrophobic substance on the rubber surface. By soaking with NaOH, it can react with zinc stearate (chemical formula (C 17 H 35 COO)2Zn) on the rubber surface to generate soluble substances and be removed. The reaction equation is:

[0031] (C 17 H 35 COO)2Zn + 4NaOH = 2Na(C 17 H35 COO)+Na2(Zn(OH)4)

[0032] The two substances generated by the reaction are soluble in water. Therefore, zinc stearate is removed during the treatment process to increase the surface roughness, thereby improving the adhesion between the rubber particles and the cement matrix.

[0033] Then, the pre-prepared cement sodium silicate mixture is poured into the mold, evenly coated on the inner surface of the mold, and the mold is placed with the open side down and rotated to dry.

[0034] A metal coil is coated on the outer surface of each elliptical cylinder. Specifically, the metal coil and the elliptical cylinder of the rubber can be connected by an organosilicon binder. When bonding, several connection points can be selected as long as the metal coil can be fixedly sleeved on the outer surface of the elliptical cylinder. The inner diameter of the metal coil is slightly larger than the outer diameter of the elliptical cylinder, and the shape is consistent with the cross-section of the elliptical cylinder. The leads at both ends of the metal coil are led out for subsequent circuit connection.

[0035] Finally, ultra-high toughness cementitious composite is poured and cured to the corresponding age to obtain an elliptical honeycomb structure of ultra-high toughness cementitious composite filled with high-elastic rubber.

[0036] The surface of the rubber in the present invention needs to be modified with NaOH and then wrapped with the cement sodium silicate mixture to improve the interfacial performance and enhance the integrity of the elliptical honeycomb structure of the ultra-high toughness cementitious composite filled with high-damping rubber. By determining the modification method of the high-damping rubber, the overall seismic performance of the structure is improved.

[0037] (2) On-site construction:

[0038] The leads at both ends of the metal coils on all elliptical cylinders are connected by wires to form a circuit. The wires can be directly connected to the leads of the coils, and waterproof insulation joints are used for waterproof protection. Multiple circuits are connected in parallel, and a circuit protection system and a power storage power source are installed to complete the circuit connection.

[0039] The elliptical honeycomb structure of ultra-high toughness cementitious composite filled with high-elastic rubber is placed upright on the bearing padstone, with the opening in the front. The size of the honeycomb structure, that is, the size of the mold, can be flexibly determined according to the actual size of the bridge pier and the engineering requirements.

[0040] The upper sleeve anchor bolt is passed through the upper connecting steel plate and the upper embedded steel plate of the lead rubber bearing and anchored on the bridge deck. The lower sleeve anchor bolt is passed through the lower connecting steel plate, the lower embedded steel plate, the isolation layer, and the bearing padstone of the lead rubber bearing and anchored on the bridge pier to complete the construction.

[0041] The present invention uses ultra-high toughness cement-based composite materials as the matrix material of the elliptical honeycomb structure, and rubber as the filling material. The interface between the cement-based composite material and the rubber is specially treated to improve the interface bonding performance. As a new type of bridge isolation and shock absorption bearing, it has better shock absorption and energy absorption characteristics, has three-way isolation and shock absorption effects, meets the normal use requirements of bridges, and extends the service life of the structure; at the same time, the vertical vibration of the honeycomb structure cuts the magnetic induction lines, and the power generation device is used to regenerate energy, improving the resource utilization rate, energy conservation, environmental protection, green and low-carbon.

[0042] Preferably, the cement sodium silicate mixture is prepared by mixing cement and 0.5 - 0.65 mol / L Na2Si03 solution, and the water-binder ratio is 0.5 - 0.65. Applying a pre-coating of cement sodium silicate plays a transitional role to avoid and reduce the direct contact between the ultra-high toughness cement-based composite material and the rubber. The dissolved Na2Si03 can react with calcium ions in the cement to form C-S-H gel, which acts as a filler for capillary pores, can improve the microstructure of the interfacial transition zone (ITZ) between the ultra-high toughness cement-based material and the rubber, reduce the porosity of the ITZ, and improve the mechanical properties of the interfacial transition zone (ITZ), thereby strengthening the bonding performance between the ultra-high toughness cement-based material and the rubber.

[0043] The high-elastic rubber referred to in the present invention can be natural rubber and synthetic rubber on the market as long as it can meet the deformation requirements.

[0044] For the parts not detailed in the present invention, existing technologies can be adopted.

[0045] The beneficial effects of the present invention are as follows:

[0046] 1. The elliptical honeycomb structure of the ultra-high toughness cement-based composite material filled with high-elastic rubber in the present invention has appropriate vertical stiffness, damping performance, energy absorption effect and fatigue resistance (the vehicle standard axle load can reach one million times of fatigue cycle).

[0047] 2. The isolation layer of the present invention can be arranged at the bottom of the lead core rubber bearing commonly used in current projects. The two are connected in series to make up for each other's deficiencies, have appropriate vertical stiffness and damping performance, and can effectively reduce the impact of vertical vibration on the bridge structure.

[0048] 3. The design of the bridge isolation layer based on power generation by cutting magnetic induction lines proposed in the present invention utilizes the vertical vibration of the honeycomb structure during the shock absorption work to cut the set strong magnetic field, generating an induced electromotive force. Several metal coils cut the magnetic induction lines together to reach the required current value, and the power generation device is used to regenerate energy, improving the resource utilization rate, energy conservation, environmental protection, green and low-carbon.

[0049] 4. In the present invention, the metal coil cuts the magnetic induction line to generate electricity and is connected to the rectifier bridge and the circuit protection system. When the direction of cutting the magnetic induction line changes, the direction of the current remains unchanged, ensuring the consistency of the current flow direction and the continuity of power generation, thereby improving the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a detailed view of a certain cell in the seismic isolation layer power generation system of the present invention;

[0051] Figure 2 It is a schematic diagram of a single cell without filled high elastic rubber, where (a) is the cell test and (b) is the numerical model;

[0052] Figure 3 It is a schematic diagram of a single cell filled with high elastic rubber, where (a) is the cell test and (b) is the numerical model;

[0053] Figure 4 It is a comparison diagram of the stress-strain curves of the cell filled with high elastic rubber and the cell without filled high elastic rubber;

[0054] Figure 5 It is a numerical model of the high-performance concrete honeycomb structure without filled and filled high elastic rubber, where (a) is without filled high elastic rubber and (b) is filled with high elastic rubber;

[0055] Figure 6 It is a schematic diagram of the fatigue loading frequency;

[0056] Figure 7 It is a comparison diagram of the stress-strain curves of the single-cycle loading of the high-performance concrete honeycomb structure without filled and filled high elastic rubber, where (a) is without filled high elastic rubber and (b) is filled with high elastic rubber;

[0057] Figure 8 It is a curve of the relationship between the number of cycles and the maximum load;

[0058] Figure 9 It is a schematic diagram of the change process of a single coil of the present invention, where (a) is the coil without load, (b) is the coil under vertical load and undergoes compression deformation, (c) is the magnetic flux unchanged without load, (d) is the magnetic flux changes under vertical load, and + represents the magnetic field direction;

[0059] Figure 10 It is a schematic diagram of the composition of the circuit protection system;

[0060] Figure 11 It is a schematic diagram of the power supply interactive charge and discharge;

[0061] Figure 12 It is a module diagram of the connection components of the power generation system of the present invention;

[0062] Figure 13 Schematic diagram of the structure after installing two groups of strong magnets at both ends of the seismic isolation layer;

[0063] Figure 14 Schematic diagram of the mold structure;

[0064] Figure 15 Schematic diagram of the installation method of the seismic isolation layer;

[0065] Figure 16 SEM image of the surface of NaOH-modified rubber;

[0066] Figure 17 Schematic diagram of the bottom structure of the mold;

[0067] Figure 18 Schematic diagram of the connection relationship of the detachable structure of the elliptical cylinder;

[0068] Among them, 1 - seismic isolation layer, 2 - ultra-high toughness cement-based composite material, 3 - high-elastic rubber, 4 - strong magnet, 5 - circuit protection system, 6 - mold, 7 - elliptical cylinder, 8 - upper connecting steel plate, 9 - upper embedded steel plate, 10 - rubber, 11 - lead core, 12 - lower connecting steel plate, 13 - lower embedded steel plate, 14 - upper sleeve anchor bolt, 15 - lower sleeve anchor bolt. Specific implementation manners

[0069] To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments, but not limited thereto. For those not elaborated in the present invention, they are all conventional technologies in the art.

[0070] Embodiment 1:

[0071] A bridge bearing seismic isolation layer power generation system based on cutting magnetic induction lines to generate electricity, as Figure 1-17 shown, includes a seismic isolation layer 1, and the seismic isolation layer 1 is installed between the bearing and the top surface of the bridge pier;

[0072] The seismic isolation layer 1 is composed of an elliptical honeycomb structure of an ultra-high toughness cement-based composite material 2 filled with high-elastic rubber, as Figure 1 described, the honeycomb structure includes a number of cells connected together, an elliptical opening is provided inside the cell, high-elastic rubber 3 is filled in the elliptical opening, and the ratio of the major axis to the minor axis of the elliptical opening is 5:3;

[0073] One strong magnet 4 is placed on each side of the seismic isolation layer 1 (a magnetic induction line is formed between the two strong magnets), a metal coil is wrapped around the surface of the high-elastic rubber in each elliptical opening, each metal coil is connected by a wire to form a circuit, and multiple circuits with metal coils are connected in parallel and connected to a power storage power source through a circuit protection system 5.

[0074] In the above-mentioned elliptical honeycomb structure, an ultra-high-toughness cement-based composite material is used as the matrix material. When the ultra-high-toughness cement-based composite material is subjected to external loads, the presence of fibers makes the cells have a crack bridging effect, so that the individual cells have super strong load-bearing capacity, displacement ductility, deformation capacity and energy absorption capacity under pressure;

[0075] Compared with circular openings and hexagonal openings, elliptical openings have strong energy absorption capacity and better seismic energy absorption effect;

[0076] Filling the elliptical opening with high-damping rubber has three functions. First, it delays the cracking during the stress process, improves the ductility and deformation capacity of the elliptical honeycomb structure of the ultra-high toughness cement-based composite material, prevents the cell from deforming too much to a certain extent, and can quickly return to its original position during vibration; second, it improves the strain hardening capacity of the honeycomb structure; third, high-damping rubber has high elasticity and viscoelasticity. Compared with cement-based materials, high-damping rubber has large elastic deformation and small elastic modulus. The hysteresis curve characteristics of high-damping rubber (load-deformation curve) are full and the energy consumption is significant, providing good shock absorption and energy absorption.

[0077] The present invention installs two sets of strong magnets with different electrodes (such as Figure 13 ), through the vertical load vibration generated by vehicles, especially large trucks, the metal coils inside the honeycomb structure of the isolation layer are driven to vibrate vertically and cut the set strong magnetic field to generate induced electromotive force. Several metal coils are connected in parallel to cut the magnetic lines of force together to achieve the required current value. The power generation device is used to regenerate energy, improve resource utilization, save energy, be environmentally friendly, and be green and low-carbon.

[0078] Embodiment 2:

[0079] A bridge support vibration isolation layer power generation system based on cutting magnetic flux lines is as described in Example 1, except that the ultra-high toughness cement-based composite material elliptical honeycomb structure is prepared by a mold 6 of high elastic rubber material, such as Figure 14 As shown, the mold 6 is a rectangular structure, and its size is adapted to the size of the seismic isolation layer. The lower bottom surface of the mold is closed and the upper surface is open. A plurality of elliptical cylinders 7 are evenly arranged on the lower bottom surface of the mold. The plurality of elliptical cylinders 7 are arranged in multiple rows and columns, and the long axes of the elliptical sections of adjacent elliptical cylinders are perpendicular to each other.

[0080] The material of the elliptical cylinder 7 is high elastic rubber, and the major axis:minor axis ratio of the elliptical cylinder is 5:3;

[0081] Preferably, the elliptical cylinder can be detachably mounted on the bottom surface of the mold to facilitate circuit connection, such as Figure 17 As shown, the elliptical cylinders shown by the dotted lines are all detachable structures, such as the existing snap-fit structure.

[0082] It can also adopt the form as shown in Figure 18 Specifically, multiple mounting caps are provided on the lower bottom surface of the mold (formed integrally or sleeved, and the material of the mounting cap is also rubber, which can be easily sleeved on the convex platform of the lower bottom surface of the mold). The size of the mounting cap is slightly larger than the size of the elliptical cylinder to facilitate wiring. A spherical card slot is provided on the mounting cap, and a spherical protrusion corresponding to the spherical card slot is provided at the bottom of the elliptical cylinder. The spherical protrusion is stuck in the spherical card slot to achieve the connection of the two, and it can also be easily disassembled.

[0083] Embodiment 3:

[0084] A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation, as described in Embodiment 2. The difference is that a bearing cushion stone is provided at the bearing position on the pier cap of the pier and abutment. The bearing cushion stone is a reinforced concrete short column, which can facilitate the replacement of the bearing in the future and leave a position for the jack for lifting, and at the same time, it is also convenient to adjust the errors caused by the construction of the bridge pier and the bridge deck; the concrete grade of the bearing cushion stone is not lower than C40, the height of the bearing cushion stone should consider the convenience of installation and maintenance and the replacement of the bearing when necessary, and the height difference at the four corners of the top surface of the bearing cushion stone shall not be greater than 2 mm.

[0085] Embodiment 4:

[0086] A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation, as described in Embodiment 3. The bearing is a lead-rubber bearing. The lead-rubber bearing includes an upper connecting steel plate 8, an upper embedded steel plate 9, rubber 10, a lead core 11, a lower connecting steel plate 12, and a lower embedded steel plate 13. The upper sleeve anchor rod 14 passes through the upper connecting steel plate 8 and the upper embedded steel plate 9 and is anchored on the bridge deck. The lower sleeve anchor rod 15 passes through the lower connecting steel plate 12, the lower embedded steel plate 13, the vibration isolation layer 1, and the bearing cushion stone and is anchored on the bridge pier. When prefabricating the shock-absorbing bearing, anchor bolt holes should be reserved at the bearing cushion stone part on the top surface of the pier and abutment. The deviation of the center and diagonal position of the reserved anchor bolt holes shall not exceed 10 mm.

[0087] The vibration isolation layer can be arranged at the bottom of the lead-rubber bearing and connected in series with the original lead-rubber bearing to make up for each other's strengths and weaknesses, forming a three-dimensional bearing vibration isolation system with appropriate stiffness and damping performance in three directions, which can effectively reduce the influence of vertical vibration on the bridge structure.

[0088] Embodiment 5:

[0089] A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation, as described in Embodiment 4. Four layers of mesh reinforcement are added to the concrete at the bottom of the bridge deck and the top of the pier and abutment connected to the bearing. The reinforcement layout range is larger than the bearing size. Preferably, the diameter of the mesh reinforcement is ф12 mm, the grid is 100 mm × 100 mm, and the layer spacing is 100 mm; the mesh reinforcement at the reserved anchor bolt holes can be cut off, and auxiliary reinforcement with the same diameter is added at the hole edge.

[0090] Embodiment 6:

[0091] A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation, as described in Embodiment 5, the strong magnet uses a neodymium magnet, and is coated with a layer of epoxy resin to prevent corrosion.

[0092] The circuit protection system 5 includes a rectifier bridge and a short-circuit protection module. Preferably, the rectifier bridge model is KBU803, and the short-circuit protection module model is CHNT RT28-32 32A.

[0093] Since the speed of the vibration isolation layer cutting the magnetic field is random and the direction is also changing at all times, the induced current generated also needs to convert the alternating current into direct current, that is, the induced current generated needs to pass through the rectifier bridge to convert the alternating current generated by cutting the magnetic field into direct current, and then charge the storage system with the direct current output by the rectifier bridge, so as to provide power for the bridge health monitoring equipment or the traffic infrastructure lighting sign;

[0094] The circuit protection system can also include battery overcharge protection and battery over-discharge protection to protect the circuit safety; the storage power supply includes two power supplies, and the two power supply brackets are provided with a power supply automatic switching controller. The two power supplies perform interactive charging and discharging. When one power supply is full, the switch can be automatically switched to charge the other power supply, and at the same time the other power supply can discharge, achieving the purpose of charging while discharging. This interactive charging and discharging circuit is controlled by a power supply automatic converter. When one power supply is charging, the discharge circuit is automatically switched to supply power to the electrical appliance by the other power supply, as Figure 11 shown.

[0095] Embodiment 7:

[0096] A construction method of a bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation, comprising the following steps:

[0097] (1) Prefabrication of the honeycomb structure:

[0098] First, modify the mold 6 by soaking it in 1mol / L NaOH solution for 40-60 minutes and washing it with clear water multiple times until the pH value of the washing water reaches 7. Modifying the mold is mainly used to improve the interfacial bonding performance between the rubber and the ultra-high toughness cement-based composite material. Because compared with the honeycomb structure filled with rubber, due to the hydrophobicity of the rubber surface, the interfacial bonding performance between the rubber and the cement matrix is weak. Under fatigue load, the first part to be damaged is the cement-rubber interface area;

[0099] After the surface of the high-damping rubber is modified with NaOH, its hydrophilic groups can form a strong bond with the cement matrix, thereby improving the rubber-cement matrix interfacial performance and enhancing the integrity of the elliptical honeycomb structure of the ultra-high toughness cement-based composite material filled with high-damping rubber. By determining the high-damping rubber modification method, the overall seismic performance of the structure is improved;

[0100] The modification principle is as follows: Zinc stearate is the main hydrophobic substance on the rubber surface. By soaking with NaOH, the zinc stearate (chemical formula: (C 17 H 35 COO)2Zn) on the rubber surface can react to form soluble substances and be removed. The reaction equation is:

[0101] (C 17 H 35 COO)2Zn + 4NaOH = 2Na(C 17 H 35 COO) + Na2(Zn(OH)4)

[0102] The two substances generated by the reaction are soluble in water. Therefore, zinc stearate is removed during the treatment process, the surface roughness is increased, and thus the bonding force between the rubber particles and the cement matrix is improved. Figure 16 It is the SEM image of the modified rubber surface;

[0103] Then, pour the pre-prepared cement sodium silicate mixture into the mold, coat it evenly on the inner surface of the mold, place the opening side of the mold downward, and rotate it to dry.

[0104] Cover a metal coil on the outer surface of each elliptical cylinder. Specifically, the metal coil and the elliptical cylinder of the rubber can be connected by an organosilicon binder. When bonding, several connection points can be selected as long as the metal coil can be fixedly sleeved on the outer surface of the elliptical cylinder. The inner diameter of the metal coil is slightly larger than the outer diameter of the elliptical cylinder, and the shape is consistent with the cross-section of the elliptical cylinder. Lead out the two ends of the metal coil for subsequent circuit connection;

[0105] Finally, pour ultra-high toughness cementitious composite concrete and cure it to the corresponding age to obtain an elliptical honeycomb structure of ultra-high toughness cementitious composite material filled with high-elastic rubber;

[0106] The rubber surface of the present invention needs to be modified with NaOH and then coated with a cement sodium silicate mixture to improve the interfacial performance and enhance the integrity of the elliptical honeycomb structure of the ultra-high toughness cementitious composite material filled with high-damping rubber. By determining the modification method of high-damping rubber, the overall seismic performance of the structure is improved;

[0107] (2) On-site construction:

[0108] Connect the leads at both ends of the metal coils on all elliptical cylinders through wires to form a circuit. The wires can be directly connected to the leads of the coils, and waterproof insulation joints are used for waterproof protection. Multiple circuits are connected in parallel, and a circuit protection system and a power storage power supply are installed to complete the circuit connection;

[0109] The elliptical honeycomb structure of ultra-high toughness cementitious composite filled with high elastic rubber is placed upright on the bearing padstone, with the opening facing forward. The size of the honeycomb structure, that is, the size of the mold, can be flexibly determined according to the actual size of the bridge pier and the engineering requirements.

[0110] Pass the upper sleeve anchor through the upper connecting steel plate and upper embedded steel plate of the lead rubber bearing and anchor it on the bridge deck. Pass the lower sleeve anchor through the lower connecting steel plate, lower embedded steel plate, seismic isolation layer and bearing padstone of the lead rubber bearing and anchor it on the bridge pier to complete the construction.

[0111] The present invention uses ultra-high toughness cementitious composite as the matrix material of the elliptical honeycomb structure and rubber as the filling material. The interface between the cementitious composite and rubber is specially treated to improve the interface bonding performance. As a new type of bridge seismic isolation and shock absorption bearing, it has better shock absorption and energy absorption characteristics, has three-way seismic isolation and shock absorption effects, meets the normal use requirements of the bridge, and extends the service life of the structure. At the same time, the vertical vibration of the honeycomb structure cuts the magnetic induction lines, and the power generation device is used to regenerate energy, improving the resource utilization rate, saving energy, protecting the environment, and being green and low-carbon.

[0112] Example 8:

[0113] A construction method of a bridge bearing seismic isolation layer power generation system based on power generation by cutting magnetic induction lines is as described in Example 7. The difference is that the cement sodium silicate mixture is prepared by mixing cement and 0.5 - 0.65 mol / L Na2Si03 solution, and the water-binder ratio is 0.5 - 0.65. Applying the cement sodium silicate pre-coating plays a transitional role to avoid and reduce the direct contact between the ultra-high toughness cementitious composite and rubber. The dissolved Na2Si03 can react with calcium ions in the cement to form C-S-H gel, which acts as a filler for capillary pores, can improve the microstructure of the interface transition zone (ITZ) between the ultra-high toughness cementitious material and rubber, reduce the porosity of the ITZ, and improve the mechanical properties of the interface transition zone (ITZ), thereby strengthening the bonding performance between the ultra-high toughness cementitious material and rubber.

[0114] Prepare the honeycomb structure according to Example 7 using the mix proportion of the ultra-high toughness cementitious composite in Table 1, where the fiber is REC-15 type PVA fiber from Kuraray Company of Japan, and the volume fraction is 1.8%.

[0115] Table 1: Mix proportion of ultra-high toughness cementitious composite (kg / m 3 )

[0116]

[0117] The effects of fillers on the mechanical behavior and energy absorption performance of cement-based honeycomb composites were studied by means of experiments and numerical simulations. Quasi-static compression and cyclic loading fatigue performance tests were carried out on the structures filled with rubber and unfilled rubber, respectively.

[0118] The numerical simulation was carried out using the finite element software ABAQUS, and the concrete damage plasticity model (CPDM) was adopted in the ABAQUS / Explicit module. The input parameters of the ultra-high toughness cement-based composite material elements are shown in Table 2, and the rubber elements adopt the Yeoh nonlinear model in the hyperelastic body. The strain potential order of Yeoh is 3, and the input parameters are shown in Table 3.

[0119] Table 2: Input parameters of ultra-high toughness cement-based composite materials

[0120]

[0121] Table 3: Values of each parameter of the Yeoh nonlinear model

[0122] C10 C20 C30 D1 D2 D3 0.11 0.02 0 0 0 0

[0123] Among them, C i0 and D i represent the model parameters of the material

[0124] Quasi-static compression tests and numerical simulations were carried out on the single-cell structures filled with rubber and unfilled rubber, as shown in Figure 2 、 3 , and the input parameters of the model elements were corrected by comparing the experimental and simulation results. There are elliptical holes inside the cell, and the size of a single cell model is 9 cm × 9 cm;

[0125] The corrected input parameters of the model elements were directly used in the cyclic loading fatigue test models of the honeycomb structures unfilled with rubber and filled with rubber. The honeycomb structure was obtained by a 4×4 array of single cells in the x and y directions, and the size of the honeycomb structure model is 12 cm × 12 cm.

[0126] It can be seen from the single-cell numerical model that the average stress of the quasi-static compression of the honeycomb structure filled with high-damping rubber increases by nearly 1 time;

[0127] The strain range of 11%-13% was selected for the numerical simulation of fatigue performance, and the frequency of fatigue loading was 1 Hz. It can be seen that the honeycomb structure filled with high-elastic rubber has excellent fatigue performance. Under millions of cyclic loads, its co-working performance is good and its anti-fatigue performance is excellent.

[0128] Figure 2 and Figure 3 were used for the correction of the model input parameters. It can be known from the experimental and numerical model calculations that the honeycomb structure filled with high-damping rubber materials significantly improves the strength and fracture energy of the structure.

[0129] According to Figure 2-Figure 4 and the simulation results, it can be seen that the honeycomb structure of the filled rubber can achieve an elastic deformation of 13%, which can ensure the change of the magnetic flux of the coil, and further ensure the power generation efficiency of the power generation system.

[0130] It should be noted that Figure 4 In, the solid line represents the specimen filled with rubber, and the dashed line represents the specimen without rubber filling. Among them, the four dashed lines from top to bottom correspond one by one to the four solid lines from top to bottom, that is, the topmost dashed line and the topmost solid line have the same other conditions except for the rubber filling, as a control; the same comparison is made for other curves. From Figure 4 It can be seen that after filling with rubber, the performance of the honeycomb structure has been improved, and the energy absorption effect has also been improved.

[0131] Figure 7 In, the abscissa is strain and the ordinate is stress. The energy absorption effect can be illustrated by the area of the shaded part in Figure 7 It can be seen from the figure that the honeycomb structure filled with high-elastic rubber has a better energy absorption effect.

[0132] When the present invention works, it can cut the magnetic induction line to generate electricity. The area of the coil where the conductor cuts the magnetic induction line changes, and then the magnetic flux changes, as Figure 9 shown.

[0133] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines to generate electricity, characterized in that It includes a seismic isolation layer, and the seismic isolation layer is installed between the bearing and the top surface of the bridge pier. The seismic isolation layer is composed of an ultra-high toughness cement-based composite material elliptical honeycomb structure filled with high-elastic rubber. The honeycomb structure includes a number of cells connected together. An elliptical opening is provided inside the cell, and the elliptical opening is filled with high-elastic rubber. A strong magnet is placed on each side of the seismic isolation layer. A metal coil is wrapped around the surface of the high-elastic rubber in each elliptical opening. Each metal coil is connected by a wire to form a circuit. Multiple circuits with metal coils are connected in parallel and connected to a storage power source through a circuit protection system. The ultra-high toughness cement-based composite material elliptical honeycomb structure is prepared by a mold made of high-elastic rubber material. The mold is a rectangular structure, and its size is adapted to the size of the seismic isolation layer. The bottom surface of the mold is closed, and the upper surface is open. A number of elliptical columns are evenly arranged on the bottom surface of the mold. The multiple elliptical columns are arranged in multiple rows and columns, and the major axes of the elliptical cross-sections of adjacent elliptical columns are perpendicular to each other.

2. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 1, wherein The material of the elliptical column is also high-elastic rubber. The elliptical column is detachably installed on the bottom surface of the mold.

3. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 1, characterized in that A bearing pad stone is provided at the bearing position on the pier cap of the pier. The bearing pad stone is a reinforced concrete short column. The concrete grade of the bearing pad stone is not lower than C40, and the height difference at the four corners of the top surface of the bearing pad stone shall not be greater than 2 mm.

4. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 3, wherein The bearing is a lead-rubber bearing. The lead-rubber bearing includes an upper connecting steel plate, an upper embedded steel plate, rubber, a lead core, a lower connecting steel plate and a lower embedded steel plate. The upper sleeve anchor rod passes through the upper connecting steel plate and the upper embedded steel plate and is anchored on the bridge deck. The lower sleeve anchor rod passes through the lower connecting steel plate, the lower embedded steel plate, the seismic isolation layer and the bearing pad stone and is anchored on the bridge pier.

5. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 4, wherein Four layers of mesh steel bars are added to the concrete at the bottom of the bridge deck connected to the bearing and the top of the pier. The reinforcement layout range is larger than the size of the bearing.

6. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 1, characterized in that The strong magnet uses a neodymium magnet and is coated with a layer of epoxy resin to prevent corrosion.

7. The bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 6, wherein The circuit protection system includes a rectifier bridge and a short-circuit protection module.

8. A construction method of the bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 2, characterized in that, It includes the following steps: (1) Prefabrication of the honeycomb structure: First, modify the mold by soaking it in a 1 mol / L NaOH solution for 40 - 60 minutes, and wash it with water multiple times until the pH value of the washing water reaches 7. Then pour the pre-prepared cement sodium silicate mixture into the mold, coat it evenly on the inner surface of the mold, and place the mold with the open side down and rotate it to dry. Wrap a metal coil around the outer surface of each elliptical column, and lead out the two ends of the metal coil for subsequent circuit connection. Finally, pour ultra-high toughness cement-based concrete and cure it to the corresponding age to obtain an ultra-high toughness cement-based composite material elliptical honeycomb structure filled with high-elastic rubber. (2) On-site construction: Connect the two ends of the leads of the metal coils on all the elliptical columns by wires to form a circuit. Multiple circuits are connected in parallel, and a circuit protection system and a storage power source are installed to complete the circuit connection. Stand the elliptical honeycomb structure of ultra-high toughness cementitious composite material filled with high-elastic rubber upright on the bearing padstone, with the opening facing forward. Pass the upper sleeve anchor through the upper connecting steel plate and upper embedded steel plate of the lead rubber bearing and anchor it on the bridge deck. Pass the lower sleeve anchor through the lower connecting steel plate, lower embedded steel plate, seismic isolation layer and bearing padstone of the lead rubber bearing and anchor it on the bridge pier to complete the construction.

9. The construction method of the bridge bearing vibration isolation layer power generation system based on cutting magnetic induction lines for power generation according to claim 8, characterized in that, The cement sodium silicate mixture is made by mixing cement and 0.5 - 0.65 mol / L Na2SiO3 solution, and the water-binder ratio is 0.5 - 0.65.

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