An anti-seismic damping structure and anti-seismic control method for an industrial building

Abstract

An earthquake-proof damping structure and earthquake-proof control method for industrial buildings, the earthquake-proof damping joints of which are composed of columns, cross beams, leaf springs, and viscous dampers. The columns include hollow concrete square columns and square steel columns located inside the hollow concrete square columns, and a plurality of through square holes are provided on the hollow concrete square columns. Inclined planes are provided on four planes at the lower part of the square steel column, and four wedge-shaped hanging blocks are suspended by steel wires at the upper part of the square steel column. The cross beam is supported in the square hole and is elastically connected to the square steel column through a leaf spring. The viscous damper is obliquely hinged between the cross beam and the square steel column, and it has a demagnetization device and a magnetization device, which can change the viscous characteristics of the viscous damper. The present invention has good shock absorption performance. Before the arrival of the earthquake shear wave, it can make the viscous damper have viscous characteristics matching the earthquake intensity level, respond specifically to the destructiveness of the earthquake, and minimize the degree of damage, truly achieving "not collapsing in major earthquakes, being repairable in moderate earthquakes, and not being damaged in minor earthquakes".

Description

Technical Field

[0001] The present invention relates to the technical field of building earthquake prevention, and particularly to an earthquake-proof damping structure and an earthquake-proof control method for industrial buildings. Background Art

[0002] Different from civil buildings, industrial buildings have a relatively large span. Early industrial buildings mostly adopted frame structures made of cast concrete, while current industrial buildings mostly adopt steel structures connected by steel. Concrete frames belong to rigid structures, and their advantages are high compressive strength and still having relatively high strength at high temperatures; their disadvantages are poor toughness and poor shear resistance, and they are prone to collapse during earthquakes. Steel structures belong to ductile structures, and their advantages are good toughness and good shear resistance, and they are not prone to collapse during earthquakes; their disadvantages are relatively low compressive strength and the risk of softening and collapsing of steel structures during fires.

[0003] As is well known, the shear wave causes the greatest damage to buildings during earthquakes, and existing buildings mostly use dampers to absorb and offset the shear force brought by the shear wave. Nevertheless, in the face of earthquakes with a relatively large intensity level, existing industrial buildings will still collapse. The reason is that industrial buildings have many joints (in the industry, the part where the column intersects the beam is called a joint). Due to different earthquake intensity levels and the complexity of earthquake waveforms, the displacement and torsion amounts of each joint are different, and there will always be joints where the displacement or torsion amount exceeds the safety range. After this joint breaks, it will cause other joints to break, and then cause the collapse of industrial buildings.

[0004] In summary, it is necessary to innovate the earthquake-proof damping structure and the earthquake-proof control method for industrial buildings to truly achieve the design goal of "not collapsing in major earthquakes, being repairable in medium earthquakes, and not being damaged in minor earthquakes". Summary of the Invention

[0005] In order to overcome the deficiencies in the background art, the present invention discloses an earthquake-proof damping structure and an earthquake-proof control method for industrial buildings, and its purpose is to innovate the earthquake-proof damping structure and the earthquake-proof control method for industrial buildings to achieve the design goal of "not collapsing in major earthquakes, being repairable in medium earthquakes, and not being damaged in minor earthquakes".

[0006] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0007] An earthquake-proof damping structure for an industrial building, comprising:

[0008] The column includes a hollow concrete square column and a square steel column located inside the hollow concrete square column. A plurality of through square holes are provided on the hollow concrete square column; inclined planes are provided on four planes at the lower part of the square steel column, and four wedge-shaped hanging blocks are suspended by steel wires at the upper part of the square steel column; the front surface of the wedge-shaped hanging block is a flat surface, and the back surface is a wedge surface. The wedge surface fits with the inclined plane, and the flat surface fits with the inner wall surface of the hollow concrete square column.

[0009] The cross beam, its end is supported in the square hole and is elastically connected to the square steel column through a leaf spring.

[0010] The viscous damper is obliquely hinged between the cross beam and the square steel column; it includes a cylinder and a piston. Magnetizable magnetic fluid is filled in the cylinder, and a demagnetizing device and a magnetizing device are arranged outside the cylinder; the demagnetizing device and the magnetizing device can change the magnetism of the magnetic fluid, thereby changing the viscous characteristics of the viscous damper.

[0011] After implementing the above technical solution, the following beneficial effects can be produced:

[0012] 1. The hollow concrete square column is used as the outer column, which has high compressive strength and poor shear resistance. In the present invention, the hollow concrete square column only bears the weight from the floor slab and the cross beam, and does not bear the shear force from the cross beam and the floor slab. When an earthquake occurs, the possibility of the hollow concrete square column collapsing is greatly reduced.

[0013] 2. The square steel column is used as the inner column, which has relatively low compressive strength and good shear resistance. In the present invention, the square steel column only bears the shear force from the cross beam and the floor slab, and does not bear the weight from the cross beam and the floor slab, and the seismic performance is greatly improved.

[0014] 3. Since the square steel column is arranged inside the hollow concrete square column, when a fire occurs, the heat is isolated by the hollow concrete square column, and the square steel column will not collapse due to heat softening.

[0015] 4. Under normal circumstances, the wedge-shaped lifting block can fix the lower part of the square steel column by its own weight and the action of the wedge surface, ensuring that the lower part of the square steel column has high rigidity. During an earthquake, the swing amplitude of the upper part of the square steel column is huge compared to the lower part of the square steel column. First of all, the wedge-shaped lifting block can play a role in reducing the swing of the square steel column. When the upper part of the square steel column swings to the left, the wedge-shaped lifting block on the right is lifted by the steel wire rope. At this time, the kinetic energy of the square steel column swinging to the left is reduced by doing work; when the upper part of the square steel column swings to the right, the wedge-shaped lifting block on the left is lifted by the steel wire rope. At this time, the kinetic energy of the square steel column swinging to the right is reduced by doing work. Obviously, this can effectively reduce the swing amplitude and duration of the square steel column. Secondly, by alternately lifting and lowering a pair of opposite wedge-shaped lifting blocks through the steel wire rope, a small amount of translation can be generated at the lower part of the square steel column, and this translation helps to reduce the shear damage caused by the earthquake shear wave to the square steel column. More importantly, during the translation process, the lower part of the square steel column will lose part of its rigidity, which helps to quickly reduce the self-vibration of the square steel column caused by the seismic wave.

[0016] 5. The cross beam is elastically connected to the square steel column through leaf springs. When a certain cross beam generates translation under the action of seismic waves, first, part of the kinetic energy is absorbed through the deformation of the leaf springs, and then the acting force is applied to the square steel column, reducing the shear damage of the seismic waves to the square steel column. After the square steel column is bent, the kinetic energy is further absorbed through the deformation of other leaf springs, thereby reducing the impact of the translation of this cross beam on other cross beams.

[0017] 6. Existing magnetorheological fluids are all non-magnetizable. Without an external magnetic field, the magnetorheological fluid does not have magnetism. With an external magnetic field, the magnetorheological fluid has magnetism. For existing magnetorheological viscous dampers, an external magnetic field needs to be applied to the magnetorheological fluid by energizing the coil to make the magnetorheological viscous damper have certain viscous characteristics. During an earthquake, power supply is exactly the most difficult to guarantee. This viscous damper has a demagnetization device and a magnetization device, making the magnetorheological fluid have certain magnetism before an earthquake and being unaffected by power outages.

[0018] Furthermore, the technical solution is improved. A rubber plate is fixed on the front of the wedge-shaped lifting block, and a steel plate is inlaid on the inner wall surface of the hollow concrete square column, and the rubber plate is in contact with the steel plate.

[0019] After implementing the above technical solution, the following beneficial effects can be produced:

[0020] 1. The steel plate has high surface flatness and hardness, which can improve the degree of fit with the wedge-shaped lifting block.

[0021] 2. The rubber plate has elasticity and can play a role in shock absorption.

[0022] Further improve the technical solution. The cross beam is an H-shaped cross beam, and there are belt-passing holes on the web of the H-shaped cross beam; there are embedding holes on the square steel column, and a pair of lifting lug plates are welded on both sides of the embedding holes; the end of the cross beam extends into the embedding holes, and the leaf spring is connected between the pair of lifting lug plates and the belt-passing holes.

[0023] After implementing the above technical solution, the following beneficial effects can be produced:

[0024] 1. Design the lifting lug plates and belt-passing holes to facilitate the installation of the leaf spring between the cross beam and the square steel column.

[0025] 2. In case the hollow concrete square column collapses, the cross beam and the floor slab will lose support and fall. Design the embedding holes, and extend the end of the cross beam into the embedding holes. When the hollow concrete square column collapses, the end of the cross beam will fall into the embedding holes and will not continue to fall downward, improving the safety of industrial buildings.

[0026] Further improve the technical solution. An adjustable lifting ring screw is screwed on the upper part of the square steel column, a fixed pulley is fixed on the hollow concrete square column, and a steel wire rope is suspended between the lifting ring screw and the wedge-shaped lifting block and is connected to the fixed pulley.

[0027] After implementing the above technical solution, the following beneficial effects can be produced:

[0028] 1. The steel wire rope can be kept in a taut state by adjusting the lifting ring screw.

[0029] 2. After an earthquake, the wedge-shaped lifting block can be lifted by the lifting ring screw to restore the square steel column to its original position.

[0030] Further improve the technical solution. The solid particles in the magnetorheological fluid are soft magnetic alloy particles or ferrite particles.

[0031] After implementing the above technical solution, the beneficial effect is that ferrite, as well as soft magnetic alloys such as Fe-Ni alloy, Fe-Si alloy, and Fe-Co alloy, have both the characteristics of rapid demagnetization and rapid magnetization, and are very suitable for making magnetizable magnetorheological fluids.

[0032] Further improve the technical solution. The earthquake-proof damping structure further includes a longitudinal wave sensor and a control system. The longitudinal wave sensor is used to sense the longitudinal wave generated by an earthquake, and the control system is connected to the demagnetization device and the magnetization device and is used to change the viscous characteristics of the viscous damper.

[0033] After implementing the above technical solution, the beneficial effects are as follows: When an earthquake occurs, the propagation speed of the longitudinal wave in the earth's crust is greater than that of the transverse wave, and the destructiveness of the transverse wave to buildings is greater than that of the longitudinal wave. Generally, the intensity of the longitudinal wave has a certain correlation with the intensity of the transverse wave. By measuring the intensity of the longitudinal wave, the intensity of the transverse wave can be roughly predicted. In this way, the control system can change the viscous characteristics of the viscous damper in advance to prepare for the arrival of the transverse wave.

[0034] An earthquake prevention and control method includes the following steps:

[0035] S1: Model the industrial building and simulate the displacement and torsional amount of each node under earthquake waveforms of different intensity levels through software;

[0036] S2: For the nodes with excessive displacement and torsional amount, change the viscous characteristics of the corresponding viscous damper to make the displacement and torsional amount of the node meet the safety standards, and record the viscous characteristics of the viscous damper and its corresponding intensity level;

[0037] S3: When an earthquake occurs, the control system determines the intensity of the earthquake according to the longitudinal wave signal received by the longitudinal wave sensor, and makes the viscous damper have viscous characteristics matching the earthquake intensity level through the demagnetization device and the magnetization device.

[0038] After implementing the above technical solution, the beneficial effects are as follows: By modeling and software simulation, the weak nodes under different earthquake magnitudes are found, and the viscous damper is made to have viscous characteristics matching the earthquake intensity level before the arrival of the earthquake transverse wave, so as to respond specifically to the destructiveness of the earthquake and achieve the goal of "not collapsing in major earthquakes, being repairable in medium earthquakes, and not being damaged in minor earthquakes". Description of the Drawings

[0039] Attached Figure 1 Shows the structural schematic diagram of a certain node of the industrial building.

[0040] Attached Figure 2 Shows the three-dimensional structural schematic diagram of the hollow concrete square column.

[0041] Attached Figure 3 Shows the sectional structural schematic diagram of the hollow concrete square column.

[0042] Attached Figure 4 Shows the three-dimensional structural schematic diagram of the square steel column.

[0043] Attached Figure 5 Shows the partial structural schematic diagram of the upper part of the square steel column.

[0044] Attached Figure 6 Shows the partial structural schematic diagram of the middle part of the square steel column.

[0045] AttachedFigure 7 Shown is a partial structural schematic diagram of the lower part of a square steel column.

[0046] Attached Figure 8 Shown is an overall sectional structural schematic diagram of a column.

[0047] Attached Figure 9 Shown is a sectional structural schematic diagram of the bottom of a column.

[0048] Attached Figure 10 Shown is a schematic diagram of the connection between a fixed pulley and a steel wire rope.

[0049] Attached Figure 11 Shown is a schematic diagram of the movement of a wedge-shaped lifting block when the upper part of a square steel column sways.

[0050] Attached Figure 12 Shown is a schematic diagram of the connection structure between a cross beam and a column.

[0051] Attached Figure 13 Shown is a schematic diagram of the connection structure between a cross beam and a square steel column.

[0052] Attached Figure 14 Shown is a sectional structural schematic diagram of a viscous damper.

[0053] Accompanying drawings

[0054] 1. Hollow concrete square column; 11. Square hole; 12. Limiting plate; 13. Steel plate; 14. Rubber pad; 15. Fixed pulley; 16. Concrete foundation; 17. Concrete floor

[0055] 2. Square steel column; 21. Inclined panel; 22. Embedded hole; 23. Lifting lug plate; 24. Lifting ring screw; 25. Steel wire rope; 26. Wedge-shaped lifting block; 27. Rubber plate

[0056] 3. Cross beam

[0057] 4. Leaf spring

[0058] 5. Viscous damper; 51. Cylinder barrel; 52. Piston; 53. Rod; 54. Coil; 55. Magnetic fluid Detailed implementation manners

[0059] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The attached Figure 1 shows a structural schematic diagram of a certain node in an industrial building. As can be seen from the attached Figure 1 It can be seen that this node is composed of a column and three crossbeams 3. It should be noted that there are many nodes in the industrial building. According to the different distribution positions, the nodes at the corners usually have two crossbeams, the nodes on the side walls usually have three crossbeams, and the nodes in the middle usually have four crossbeams. In this embodiment, the Figure 1 node in the attached

[0061] is located on the side wall of the first floor of the industrial building, and the other nodes are not shown.

[0062] Different from the existing columns, the column is composed of a hollow concrete square column 1 and a square steel column 2 located inside the hollow concrete square column 1.

[0062] Referring to the attached Figure 2 the attached Figure 2 shows a three-dimensional structural schematic diagram of the hollow concrete square column. As can be seen from the attached Figure 2 It can be seen that the cross-section of the hollow concrete square column 1 is in a shape of a Chinese character "hui", the hollow concrete square column 1 is located on the concrete foundation 16 and the concrete floor 17, and there are a plurality of through square holes 11 on the hollow concrete square column 1.

[0063] Referring to the attached Figure 3 the attached Figure 3 shows a sectional structural schematic diagram of the hollow concrete square column. As can be seen from the attached Figure 3It can be seen that a limiting plate 12 welded by a steel plate 13 is fixed within the square hole 11. The limiting plate 12 is composed of a bottom plate and a pair of vertical plates. Steel plates 13 are inlaid on four faces at the lower part of the inner wall surface of the hollow concrete square column 1, and a rubber pad 14 is placed on the concrete foundation 16.

[0064] Refer to the appendix Figure 4 , the appendix Figure 4 shows a three-dimensional structural schematic diagram of a square steel column. The main body of the square steel column 2 is a square steel pipe with a size of 32X32 cm, and the material is Q235.

[0065] Refer to the appendix Figure 5 , the appendix Figure 5 shows a partial structural schematic diagram of the upper part of the square steel column. It can be seen from the appendix Figure 5 that on each of the four side faces of the upper part of the square steel column, a pair of vertically adjustable lifting ring screws 24 are screwed, and a steel wire rope 25 is suspended at the lower end of the lifting ring screw 24.

[0066] Refer to the appendix Figure 6 , the appendix Figure 6 shows a partial structural schematic diagram of the middle part of the square steel column. It can be seen from the appendix Figure 6 that four embedding holes 22 are provided in the middle part of the square steel column, and a pair of long strip-shaped lifting lug plates 23 are welded on both sides of the embedding holes 22.

[0067] Refer to the appendix Figure 7 , the appendix Figure 7 shows a partial structural schematic diagram of the lower part of the square steel column. It can be seen from the appendix Figure 7 that on each of the four side faces of the lower part of the square steel column, an inclined panel 21 is welded. The inclined panel 21 has an inclined surface that slopes inward. The wedge-shaped lifting block 26 is suspended at the lower part of the square steel column through the steel wire rope 25. The wedge-shaped lifting block 26 is a cast iron block. The front surface of the wedge-shaped lifting block 26 is a plane, and the back surface is a wedge surface. A rubber plate 27 is fixed on the front surface of the wedge-shaped lifting block 26. The wedge surface on the wedge-shaped lifting block 26 is in sliding fit with the inclined surface on the inclined panel 21, so that the rubber plate 27 can be kept in a vertical state.

[0068] Refer to the appendix Figure 8 , the appendix Figure 8 shows an overall sectional structural schematic diagram of the column. It can be seen from the appendix Figure 8 that the square steel column 2 is arranged within the hollow concrete square column 1, and a certain gap is reserved. When a fire occurs, the heat is isolated by the hollow concrete square column 1, and the square steel column 2 will not collapse due to heat softening.

[0069] Refer to the appendix Figure 9 , the appendix Figure 9 shows a sectional structural schematic diagram of the bottom of the column. It can be seen from the appendix Figure 9It can be seen that the bottom of the square steel column is placed on the rubber pad 14, and the rubber pad 14 can play a role in shock absorption and seismic isolation for the square steel column. Under normal circumstances, the steel wire rope 25 is in a taut state, and the rubber plate 27 on the front of the wedge-shaped hanging block 26 fits with the steel plate 13 on the inner wall of the corresponding hollow concrete square column. The steel plate 13 has a high surface flatness and hardness, which can improve the fit with the rubber plate 27. In addition, the rubber plate 27 is elastic and can play a role in shock absorption and seismic isolation.

[0070] By the attached Figure 9 It can be seen that the four wedge-shaped hanging blocks 26 fix the lower part of the square steel column by using their own weight and the action of the wedge surface, which can ensure that the lower part of the square steel column has high rigidity.

[0071] See attached Figure 10 , attached Figure 10 The figure shows the connection between the fixed pulley and the wire rope. Figure 10 It can be seen that the fixed pulley 15 is installed on the limiting plate 12 , and the fixed pulley 15 is connected to the steel wire rope 25 to guide the steel wire rope 25 .

[0072] See attached Figure 11 , attached Figure 11 The figure shows the movement of the wedge-shaped suspension block when the upper part of the square steel column swings. Figure 11 It can be seen that when an earthquake occurs, the upper part of the square steel column 2 will have a larger swing amplitude (the higher the building, the larger the swing amplitude), and at this time the wedge-shaped suspension block 26 can reduce the swing of the square steel column 2. When the upper part of the square steel column 2 swings to the left, the wedge-shaped suspension block 26 on the right side is lifted by the steel wire rope 25, and the kinetic energy of the swing of the square steel column 2 to the left is reduced by doing work. Vice versa, this can effectively reduce the swing amplitude and duration of the square steel column 2.

[0073] Secondly, by alternately lifting and lowering a pair of relative wedge-shaped hangers 26 through the steel wire rope 25, a small amount of translation S can be generated in the lower part of the square steel column 2 along the swing direction. This translation helps to reduce the shear damage to the square steel column 2 caused by the earthquake shear wave.

[0074] More importantly, during the translation process, the lower part of the square steel column 2 will lose some rigidity. This partial loss of rigidity is not enough to cause the square steel column to fall, but it helps to quickly reduce the self-vibration of the square steel column caused by seismic waves. This shock absorption principle is easy to understand. If we hold one end of the steel wire (equivalent to rigid fixation) and move the other end of the steel wire, the steel wire will vibrate for a long time. If we loosen the steel wire (equivalent to losing rigid fixation), the self-vibration of the steel wire will quickly disappear.

[0075] See attached Figure 12 , attached Figure 12 The figure shows the connection structure diagram of the cross beam 3 and the column. Figure 12It can be seen that the cross beam 3 is an H-shaped steel structure cross beam. The cross beam 3 is supported on the limiting plate 12 in the square hole, and the end of the cross beam 3 extends into the embedding hole 22. Its advantage is that once the hollow concrete square column 1 collapses, the end of the cross beam 3 will fall into the embedding hole 22 and will not continue to fall downward, improving the safety of industrial buildings.

[0076] The hollow concrete square column 1 serves as an outer column, which has high compressive strength and poor shear resistance. In this embodiment, the bottom plate on the limiting plate 12 is used to bear the weight of the cross beam 3 and the floor slab, and a pair of vertical plates are used to limit the lateral movement of the cross beam 3. Since the hollow concrete square column 1 only bears the weight from the floor slab and the cross beam 3 through the square hole 11 and the limiting plate 12 and does not bear the shear force from the cross beam 3 and the floor slab, the possibility of the hollow concrete square column 1 collapsing during an earthquake is greatly reduced.

[0077] The square steel column 2 serves as an inner column, which has relatively low compressive strength and good shear resistance. In this embodiment, the square steel column 2 only bears the shear force from the cross beam 3 and the floor slab and does not bear the weight from the cross beam 3 and the floor slab, greatly improving the seismic performance of industrial buildings.

[0078] Refer to the attached Figure 13 attachment Figure 13 which shows the schematic connection structure of the cross beam and the square steel column. From the attached Figure 13 it can be seen that through holes are provided on the web of the cross beam 3, and the leaf spring 4 is connected between a pair of lug plates 23 and the through holes. Since the cross beam 3 is elastically connected to the square steel column 2 through the leaf spring 4, when a certain cross beam 3 generates translation under the action of seismic waves, part of the kinetic energy is first absorbed through the deformation of the leaf spring 4, and then the acting force is applied to the square steel column 2, reducing the shear damage of the seismic waves to the square steel column 2.

[0079] It should be noted that, in the case where the square steel column does not bend, the other two cross beams are not affected by the translation of this cross beam. When the square steel column bends, the kinetic energy is further absorbed through the deformation of another leaf spring in the same direction, thereby reducing the influence of the translation of this cross beam on the cross beams in the same direction.

[0080] Refer to the attached Figure 1 again. There are three viscous dampers 5, which are obliquely hinged between the three cross beams 3 and the square steel column 2 through hinges. The function of the viscous damper 5 is to reinforce the joints and at the same time enable the joints to have a certain amount of movement and torsion.

[0081] Refer to the attached Figure 14 attachment Figure 14 which shows the schematic cross-sectional structure of the viscous damper. From the attached Figure 14It can be seen that the viscous damper 5 is mainly composed of a cylinder 51, a three-stage piston 52, a rod 53 and a coil 54. A magnetizable ferrofluid 55 is filled in the cylinder 51. A plurality of damping holes are provided on the piston 52, and the damping holes can reduce the flow rate of the ferrofluid 55, playing a role in buffering and damping the movement of the piston 52 and the rod 53. The cylinder 51 and the piston 52 are made of aluminum alloy. A coil 54 is wound around the outside of the cylinder 51, and the coil 54 is respectively connected to a demagnetizing device (not shown in the figure) and a magnetizing device (not shown in the figure).

[0082] Ferrofluid, also known as magnetic liquid, ferromagnetic fluid or magnetic fluid, is a stable colloidal liquid formed by mixing magnetic particles with a diameter in the nanometer range (less than 10 nanometers), a base carrier liquid, and a surfactant. Existing ferrofluids use pure Fe, Ni, Co as magnetic particles, which have no magnetism by themselves and only exhibit magnetism when an external magnetic field is applied.

[0083] The magnetic particles in this ferrofluid are ferrite particles, or soft magnetic alloy particles such as Fe-Ni alloy, Fe-Si alloy and Fe-Co alloy. Ferrite and soft magnetic alloy can both demagnetize and magnetize. After magnetization, each magnetized particle in this ferrofluid has an N pole and an S pole. The magnetized particles maintain a certain arrangement distance and an orderly arrangement direction through magnetic force, just like setting a lattice between the magnetized particles. At this time, the fluidity of the ferrofluid becomes worse and the viscosity increases. The viscosity is related to the degree of magnetization. When the degree of magnetization is low, the viscosity is weak; when the degree of magnetization is high, the viscosity is strong.

[0084] The working principle of this viscous damper is that the demagnetizing circuit in the demagnetizing device makes the coil generate an alternating magnetic field to eliminate the original magnetism of the magnetized particles, and then eliminate the original viscous characteristics of the viscous damper. Then, a pulsed current is passed through the coil by the magnetizing device to make the coil generate a strong magnetic field to magnetize the magnetized particles. After magnetization, the viscous damper has new viscous characteristics.

[0085] For existing magnetorheological viscous dampers, an external magnetic field needs to be applied to the ferrofluid by energizing the coil to make the magnetorheological viscous damper have certain viscous characteristics. And when an earthquake occurs, power supply is exactly the most difficult to guarantee. This viscous damper has a demagnetizing device and a magnetizing device, making the ferrofluid have certain magnetism before an earthquake, and is not affected by power outages.

[0086] This earthquake-proof damping structure also includes a longitudinal wave sensor and a control system. Among them, the longitudinal wave sensor is used to sense the longitudinal wave generated by an earthquake, and the control system is connected to the demagnetizing device and the magnetizing device, and is used to change the viscous characteristics of the viscous damper.

[0087] To further illustrate the structure of the earthquake-proof damping, the present invention also discloses an earthquake-proof control method, which includes the following steps:

[0088] S1: Model the industrial building, and simulate the movement and torsion amounts of each node under earthquake waveforms of different intensity levels through software.

[0089] The earthquake waveforms can refer to the standard waveforms of earthquakes that have occurred, and the software can use finite element shock absorption simulation analysis software such as PKPM and ANSYS.

[0090] S2: For the nodes with excessive movement and torsion amounts, change the viscous characteristics of the corresponding viscous dampers to make the movement and torsion amounts of the nodes meet the safety standards, and record the viscous characteristics of the viscous dampers and their corresponding intensity levels until all nodes meet the safety standards.

[0091] After a building is completed, it has its own vibration frequency characteristics. Once the vibration frequency characteristics of the building are close to the frequency of the vibration source, resonance will occur. Once resonance occurs, even a low-intensity earthquake can cause the building to collapse. By changing the viscous characteristics of the viscous damper, the vibration frequency characteristics of the building can be changed, and at the same time, the movement and torsion amounts of each node can meet the safety standards.

[0092] S3: When an earthquake occurs, the control system judges the intensity of the earthquake according to the longitudinal wave signal received by the longitudinal wave sensor, and makes the viscous damper have viscous characteristics matching the earthquake intensity level through the demagnetization device and the magnetization device.

[0093] The propagation speed of the earthquake longitudinal wave in the earth's crust (5.5 - 7 km / s) is greater than that of the earthquake transverse wave (3.2 - 4 km / s). The transverse wave is a shear wave, and its destructiveness to buildings is greater than that of the longitudinal wave to buildings. Generally, the intensity of the longitudinal wave has a certain correlation with the intensity of the transverse wave. By measuring the intensity of the longitudinal wave, the intensity of the transverse wave can be roughly predicted. In this way, the control system can change the viscous characteristics of the viscous damper in advance through the demagnetization device and the magnetization device to prepare for the arrival of the transverse wave.

[0094] It can be seen from the above earthquake-proof control method that by modeling and software simulation, the weak nodes under different earthquake magnitudes can be found, and the viscous damper can be made to have viscous characteristics matching the earthquake intensity level before the arrival of the earthquake transverse wave, so as to respond to the destructiveness of the earthquake in a targeted manner and minimize the degree of damage, truly achieving "not collapsing in a major earthquake, being repairable in a medium earthquake, and not being damaged in a minor earthquake".

[0095] The parts not described in detail are the prior art. Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seismic damping structure for an industrial building, characterized by: include: The column comprises a hollow concrete square column and a square steel column located in the hollow concrete square column, wherein a plurality of through square holes are arranged on the hollow concrete square column; inclined surfaces are arranged on four planes at the lower part of the square steel column, and four wedge-shaped hanging blocks are suspended at the upper part of the square steel column by steel wire ropes; the front side of the wedge-shaped hanging block is a plane, and the back side is a wedge surface, the wedge surface is fitted with the inclined surface, and the plane is fitted with the inner wall surface of the hollow concrete square column; The crossbeam, whose end is supported in the square hole and elastically connected to the square steel column through a leaf spring; the crossbeam is an H-shaped crossbeam, and a belt-through hole is provided on the web of the H-shaped crossbeam; an embedded hole is provided on the square steel column, and a pair of ear plates are welded on both sides of the embedded hole; the end of the crossbeam extends into the embedded hole, and the leaf spring is connected between the pair of ear plates and the belt-through hole; The viscous damper is hinged obliquely between the crossbeam and the square steel column; it includes a cylinder and a piston, the cylinder is filled with a magnetizable magnetic fluid, and a demagnetizing device and a magnetizing device are arranged outside the cylinder; the demagnetizing device and the magnetizing device can change the magnetism of the magnetic fluid, thereby changing the viscous characteristics of the viscous damper.

2. The anti-seismic damping structure of an industrial building as claimed in claim 1, characterized in that: A rubber plate is fixed on the front side of the wedge-shaped hanging block, and a steel plate is inlaid on the inner wall surface of the hollow concrete square column, and the rubber plate is bonded to the steel plate.

3. The anti-seismic damping structure of an industrial building as claimed in claim 1 is characterized in that: The upper part of the square steel column is screwed with an up-and-down adjustable lifting screw, a fixed pulley is fixed on the hollow concrete square column, a steel wire rope is suspended between the lifting screw and the wedge-shaped lifting block, and is connected to the fixed pulley.

4. The anti-seismic damping structure of an industrial building as claimed in claim 1, characterized in that: The solid particles in the magnetic fluid are soft magnetic alloy particles or ferrite particles.

5. The anti-seismic damping structure of an industrial building as claimed in claim 1, characterized in that: The seismic damping structure also includes a longitudinal wave sensor and a control system. The longitudinal wave sensor is used to sense the longitudinal waves generated by earthquakes. The control system is connected to a demagnetizing device and a magnetizing device to change the viscous characteristics of the viscous damper.

6. A seismic control method applied to the seismic damping structure as claimed in claim 5, characterized in that: The following steps are involved: S1: Model the industrial building and simulate the movement and torsion of each node under earthquake waveforms of different intensity levels through software; S2: For nodes with excessive movement and torsion, the viscous characteristics of the corresponding viscous dampers are changed to make the movement and torsion of the nodes meet the safety standards, and the viscous characteristics of the viscous dampers and their corresponding severity levels are recorded; S3: When an earthquake occurs, the control system determines the intensity of the earthquake based on the longitudinal wave signal received by the longitudinal wave sensor, and uses the demagnetization device and the magnetization device to make the viscous damper have viscous characteristics that match the earthquake intensity level.

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