Quakeproof damping structure of industrial building and quakeproof control method

Abstract

The invention discloses a shockproof damping structure of an industrial building and a shockproof control method. A shockproof damping node of the shockproof damping structure is composed of a stand column, a cross beam, a plate spring and a viscous damper. The stand column comprises a hollow concrete square column and a square steel column located in the hollow concrete square column, and a plurality of through square holes are formed in the hollow concrete square column. Inclined planes are arranged on four planes at the lower part of the square steel column, and four wedge-shaped hanging blocks are hung at the upper part of the square steel column through steel wire ropes. And the cross beam is supported in the square hole and is elastically connected with the square steel column through the plate spring. The viscous damper is obliquely hinged between the cross beam and the square steel column and is provided with a demagnetizing device and a magnetizing device, and the viscous characteristic of the viscous damper can be changed. Compared with the prior art, the viscous damper has good damping performance, the viscous damper can have the viscous characteristic matched with the seismic intensity grade before seismic transverse waves arrive, the destructive effect of an earthquake is pointedly handled, the damage degree is reduced to the minimum, and the purposes that the viscous damper does not fall down in a large earthquake, can be repaired in a medium earthquake and does not damage in a small earthquake are truly achieved.

Description

Technical Field

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

[0002] Unlike civil buildings, industrial buildings have larger spans. Early industrial buildings mostly used frame structures made of cast concrete, while today's industrial buildings mostly use steel structures connected by steel. Concrete frames are rigid structures. Their advantages are high compressive strength and high strength at high temperatures. Their disadvantages are poor toughness and shear resistance, and they are prone to collapse during earthquakes. Steel structures are ductile structures. Their advantages are good toughness and shear resistance, and they are not prone to collapse during earthquakes. Their disadvantages are low compressive strength and the risk of softening and collapse during fires.

[0003] As we all know, when an earthquake occurs, transverse waves are the most destructive to buildings. Most existing buildings use dampers to absorb and offset the shear force caused by transverse waves. Despite this, existing industrial buildings will still collapse when encountering earthquakes with higher intensity levels. The reason is that industrial buildings have many nodes (the intersection of columns and beams is called a node in the industry). Due to the different intensity levels of earthquakes and the complexity of earthquake waveforms, the movement and torsion of each node are different, and there will always be nodes whose movement or torsion exceeds the safe range. When this node breaks, it will cause other nodes to break, which will cause the collapse of industrial buildings.

[0004] In summary, it is necessary to innovate the seismic damping structure and seismic control methods of industrial buildings to truly achieve “no collapse in a major earthquake, repairable in a moderate earthquake, and no damage in a minor earthquake”. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a seismic damping structure and a seismic control method for an industrial building, the purpose of which is to innovate the seismic damping structure and the seismic control method for an industrial building and achieve the design goal of "not collapsing in a major earthquake, being repairable in a moderate earthquake, and not being damaged in a minor earthquake".

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A seismic damping structure for an industrial building, comprising: 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 cross beam, whose ends are supported in the square holes and elastically connected to the square steel columns by leaf springs; 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.

[0007] After implementing the above technical solution, the following beneficial effects can be produced: 1. Hollow concrete square columns as external columns have high compressive strength but poor shear resistance. In the present invention, the hollow concrete square columns only bear the weight from the floor slab and the beams, and do not bear the shear force from the beams and the floor slab. When an earthquake occurs, the possibility of collapse of the hollow concrete square columns is greatly reduced.

[0008] 2. Square steel columns as inner columns have low compressive strength and good shear resistance. In the present invention, the square steel columns only bear the shear force from the beams and floor slabs, and do not bear the weight from the beams and floor slabs, so the seismic resistance is greatly improved.

[0009] 3. Since the square steel column is set 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 softening due to heat.

[0010] 4. Under normal circumstances, the wedge-shaped hanger 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. When an earthquake occurs, the upper part of the square steel column swings greatly compared to the lower part of the square steel column. First, the wedge-shaped hanger block can reduce the swing of the square steel column. When the upper part of the square steel column swings to the left, the wedge-shaped hanger block on the right is lifted by the wire rope, and the kinetic energy of the square steel column swinging to the left is reduced by work; when the upper part of the square steel column swings to the right, the wedge-shaped hanger block on the left is lifted by the wire rope, and the kinetic energy of the square steel column swinging to the right is reduced by work. Obviously, this can effectively reduce the swing amplitude and duration of the square steel column. Secondly, by alternately lifting and dropping a pair of opposite wedge-shaped hangers by the wire rope, a small amount of translation can be generated in the lower part of the square steel column, which helps to reduce the shear damage caused by the seismic shear wave to the square steel column. More importantly, during the translation process, the lower part of the square steel column will lose some of its rigidity, which helps to quickly reduce the square steel column's own vibration caused by seismic waves.

[0011] 5. The crossbeam is elastically connected to the square steel column through leaf springs. When a crossbeam moves under the action of earthquake waves, it first absorbs part of the kinetic energy through the deformation of the leaf springs, and then applies the force to the square steel column, reducing the shear damage of the square steel column caused by the earthquake wave. When the square steel column bends, the kinetic energy is further absorbed through the deformation of other leaf springs, thereby reducing the impact of the translation of the crossbeam on other crossbeams.

[0012] 6. Existing magnetic fluids are all non-magnetizable. When there is no external magnetic field, the magnetic fluid is non-magnetic. When there is an external magnetic field, the magnetic fluid is magnetic. For the existing magnetorheological viscous damper, it is necessary to apply an external magnetic field to the magnetic fluid by energizing the coil so that the magnetorheological viscous damper can have certain viscous characteristics. When an earthquake occurs, power supply happens to be the most difficult to guarantee. This viscous damper has a demagnetization device and a magnetization device, which makes the magnetic fluid have a certain magnetism before the earthquake occurs and is not affected by power outages.

[0013] To further improve the technical solution, a rubber plate is fixed on the front side of the wedge-shaped hanging block, a steel plate is embedded on the inner wall surface of the hollow concrete square column, and the rubber plate is bonded to the steel plate.

[0014] After implementing the above technical solution, the following beneficial effects can be produced: 1. The steel plate has high surface flatness and hardness, which can improve the fit with the wedge-shaped hanging block.

[0015] 2. The rubber sheet is elastic and can play a shock-absorbing role.

[0016] To further improve the technical solution, the crossbeam is an H-shaped crossbeam, and a through-belt 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 through-belt hole.

[0017] After implementing the above technical solution, the following beneficial effects can be produced: 1. Design the hanging lug plate and the belt hole to facilitate the installation of the leaf spring between the beam and the square steel column.

[0018] 2. In case of collapse of the hollow concrete square column, the beam and floor slab will lose support and fall. Design an embedded hole and extend the end of the beam into the embedded hole. When the hollow concrete square column collapses, the end of the beam will fall into the embedded hole and will not continue to fall, thus improving the safety of the industrial building.

[0019] To further improve the technical solution, an adjustable lifting screw is screwed up and down on the upper part of the square steel column, 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.

[0020] After implementing the above technical solution, the following beneficial effects can be produced: 1. The wire rope can be kept in a taut state by adjusting the lifting eye screw.

[0021] 2. After the earthquake, the wedge-shaped lifting block can be lifted by the lifting ring screw to restore the square steel column to its original position.

[0022] To further improve the technical solution, the solid particles in the magnetic fluid are soft magnetic alloy particles or ferrite particles.

[0023] 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 magnetic fluid.

[0024] To further improve the technical solution, 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 demagnetization device and a magnetization device to change the viscous characteristics of the viscous damper.

[0025] After implementing the above technical solution, the beneficial effect is that when an earthquake occurs, the propagation speed of longitudinal waves in the earth's crust is greater than the propagation speed of transverse waves, and the destructiveness of transverse waves to buildings is greater than that of longitudinal waves. Generally, the intensity of longitudinal waves and transverse waves has a certain correlation. By measuring the intensity of longitudinal waves, the intensity of transverse waves 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 transverse waves.

[0026] A shockproof control method comprises the following steps: 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.

[0027] After the implementation of the above technical solution, the beneficial effects are as follows: through modeling and software simulation, the weak nodes under different earthquake magnitudes are found, and before the arrival of the earthquake shear wave, the viscous damper is made to have viscous characteristics that match the earthquake intensity level, so as to respond to the destructiveness of the earthquake in a targeted manner, so as to achieve "no collapse in a large earthquake, repairable in a medium earthquake, and no damage in a small earthquake." BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 Shown is a schematic diagram of the structure of a node in an industrial building.

[0029] Attached Figure 2 Shown is a schematic diagram of the three-dimensional structure of a hollow concrete square column.

[0030] Attached Figure 3 Shown is a schematic diagram of the cross-sectional structure of a hollow concrete square column.

[0031] Attached Figure 4 Shown is a schematic diagram of the three-dimensional structure of a square steel column.

[0032] Attached Figure 5 Shown is a schematic diagram of the local structure of the upper part of the square steel column.

[0033] Attached Figure 6 Shown is a schematic diagram of the local structure of the middle part of the square steel column.

[0034] Attached Figure 7 Shown is a schematic diagram of the local structure of the lower part of the square steel column.

[0035] Attached Figure 8 What is shown is the schematic diagram of the overall cross-sectional structure of the column.

[0036] Attached Fig. 9 Shown is a schematic diagram of the cross-sectional structure of the bottom of the column.

[0037] Attached Fig.10 Shown is a schematic diagram of the connection between the fixed pulley and the wire rope.

[0038] Attached Fig.11 Shown is a schematic diagram of the movement of the wedge-shaped hanger block when the upper part of the square steel column swings.

[0039] Attached Fig.12 Shown is a schematic diagram of the connection structure between the beam and the column.

[0040] Attached Fig.13 Shown is a schematic diagram of the connection structure between the beam and the square steel column.

[0041] Attached Fig.14 Shown is a schematic cross-sectional structure diagram of a viscous damper. Attached photos

[0042] 1. Hollow concrete square column; 11. Square hole; 12. Limit plate; 13. Steel plate; 14. Rubber pad; 15. Fixed pulley; 16. Concrete foundation; 17. Concrete floor; 2. Square steel column; 21. Inclined panel; 22. Embedded hole; 23. Lifting lug plate; 24. Lifting eye screw; 25. Steel wire rope; 26. Wedge-shaped lifting block; 27. Rubber sheet; 3. Beam; 4. Leaf spring; 5. Viscous damper; 51. Cylinder; 52. Piston; 53. Rod; 54. Coil; 55. Magnetic fluid. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of description, and do 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 understood 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 limited, the terms "installed", "connected" and "connected" 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 internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0044] Attached Figure 1 The diagram shows the structure of a node in an industrial building. Figure 1 It can be seen that the node is composed of a column and three beams 3. It should be noted that industrial buildings have many nodes. Depending on the distribution location, the nodes located at the corners usually have two beams, the nodes located at the side walls usually have three beams, and the nodes located in the middle usually have four beams. Figure 1 The node in is located on the side wall of the first floor of the industrial building, and the other nodes are not shown.

[0045] 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 .

[0046] Refer to the attached Figure 2 , attached Figure 2 The figure shows the three-dimensional structure of the hollow concrete square column. Figure 2 It can be seen that the cross section of the hollow concrete square column 1 is in the shape of a Chinese character “Yu”. The hollow concrete square column 1 is located on a concrete foundation 16 and a concrete floor 17 . A plurality of through-going square holes 11 are provided on the hollow concrete square column 1 .

[0047] Refer to the attached Figure 3 , attached Figure 3 The figure shows the cross-sectional structure diagram of the hollow concrete square column. Figure 3It can be seen that a limit plate 12 welded from a steel plate 13 is fixed in the square hole 11, and the limit plate 12 is composed of a bottom plate and a pair of vertical plates. Steel plates 13 are embedded on the four faces of the lower inner wall of the hollow concrete square column 1, and a rubber pad 14 is placed on the concrete foundation 16.

[0048] Refer to the attached Figure 4 , attached Figure 4 What is shown is the three-dimensional structural schematic diagram of square steel column. The main body of square steel column 2 is a 32X32cm square steel pipe made of Q235.

[0049] Refer to the attached Figure 5 , attached Figure 5 The figure shows the partial structural diagram of the upper part of the square steel column. Figure 5 It can be seen that a pair of vertically adjustable lifting screws 24 are screwed on the four side surfaces of the upper part of the square steel column, and a steel wire rope 25 is suspended at the lower end of the lifting screws 24.

[0050] Refer to the attached Figure 6 , attached Figure 6 The figure shows the partial structural diagram of the middle part of the square steel column. Figure 6 It can be seen that four embedding holes 22 are provided in the middle of the square steel column, and a pair of long strip-shaped ear plates 23 are welded on both sides of the embedding holes 22 .

[0051] Refer to the attached Figure 7 , attached Figure 7 The figure shows the partial structural diagram of the lower part of the square steel column. Figure 7 It can be seen that a slanted plate 21 is welded on each of the four sides of the lower part of the square steel column, and the slanted plate 21 has an inwardly inclined surface. A wedge-shaped hanging block 26 is suspended at the lower part of the square steel column by a steel wire rope 25. The wedge-shaped hanging block 26 is a cast iron block, and the front of the wedge-shaped hanging block 26 is a flat surface, and the back is a wedge surface. A rubber plate 27 is fixed to the front of the wedge-shaped hanging block 26. The wedge surface on the wedge-shaped hanging block 26 is slidably matched with the inclined surface on the slanted plate 21, so that the rubber plate 27 can be kept in a vertical state.

[0052] Refer to the attached Figure 8 , attached Figure 8 The figure shows the overall cross-sectional structure of the column. Figure 8 It can be seen that the square steel column 2 is arranged in the hollow concrete square column 1 with a certain gap. 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 softening due to heat.

[0053] Refer to the attached Fig. 9 , attached Fig. 9 The figure shows the cross-sectional structure diagram of the bottom of the column. Fig. 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.

[0054] By the attached Fig. 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.

[0055] Refer to the attached Fig.10 , attached Fig.10 The figure shows the connection between the fixed pulley and the wire rope. Fig.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 .

[0056] Refer to the attached Fig.11 , attached Fig.11 The figure shows the movement of the wedge-shaped suspension block when the upper part of the square steel column swings. Fig.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.

[0057] 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.

[0058] 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.

[0059] Refer to the attached Fig.12 , attached Fig.12 The figure shows the connection structure diagram of the cross beam 3 and the column. Fig.12It can be seen that the cross beam 3 is an H-shaped steel cross beam, which is supported on the limit plate 12 in the square hole, and the end of the cross beam 3 extends into the embedding hole 22. The 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, thereby improving the safety of the industrial building.

[0060] As an external column, the hollow concrete square column 1 has high compressive strength and poor shear resistance. In this embodiment, the bottom plate on the limit plate 12 is used to bear the weight of the beam 3 and the floor, and a pair of vertical plates is used to limit the lateral movement of the beam 3. Since the hollow concrete square column 1 only bears the weight from the floor and the beam 3 through the square hole 11 and the limit plate 12, and does not bear the shear force from the beam 3 and the floor, the possibility of collapse of the hollow concrete square column 1 is greatly reduced when an earthquake occurs.

[0061] The square steel column 2 is used as an inner column, and its compressive strength is low and its shear resistance is good. In this embodiment, the square steel column 2 only bears the shear force from the beam 3 and the floor slab, and does not bear the weight from the beam 3 and the floor slab, so that the earthquake resistance of the industrial building is greatly improved.

[0062] Refer to the attached Fig.13 , attached Fig.13 The figure shows the connection structure diagram of the crossbeam and the square steel column. Fig.13 It can be seen that a through hole is 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 hole. Since the cross beam 3 is elastically connected to the square steel column 2 through the leaf spring 4, when a cross beam 3 is translated under the action of an earthquake wave, a part of the kinetic energy is first absorbed by the deformation of the leaf spring 4, and then the force is applied to the square steel column 2, thereby reducing the shear damage of the square steel column 2 caused by the earthquake wave.

[0063] It is worth noting that when the square steel column does not bend, the other two beams are not affected by the translation of the beam. When the square steel column bends, the kinetic energy is further absorbed by the deformation of another leaf spring in the same direction, thereby reducing the impact of the translation of the beam on the beam in the same direction.

[0064] Again refer to the attached Figure 1 There are three viscous dampers 5, which are hinged obliquely between the three cross beams 3 and the square steel column 2 through hinges. The function of the viscous damper 5 is to strengthen the node and at the same time make the node have a certain amount of movement and torsion.

[0065] Refer to the attached Fig.14 , attached Fig.14 The figure shows the cross-sectional structure of the viscous damper. Fig.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. The cylinder 51 is filled with a magnetizable magnetic fluid 55, and a plurality of damping holes are provided on the piston 52. The damping holes can reduce the flow of the magnetic fluid 55, and play 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, and 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).

[0066] Magnetic fluid, also known as magnetic liquid, ferromagnetic fluid or magnetic liquid, is a stable colloidal liquid made of magnetic particles with a diameter of nanometers (less than 10 nanometers), a base carrier liquid and a surfactant. Existing magnetic fluids use pure Fe, Ni, and Co as magnetic particles. They are non-magnetic in themselves and only show magnetism when a magnetic field is applied.

[0067] The magnetic particles in this magnetic fluid are ferrite particles, or soft magnetic alloy particles such as Fe-Ni alloy, Fe-Si alloy and Fe-Co alloy. Ferrites and soft magnetic alloys can be both demagnetized and magnetized. After magnetization, each magnetized particle in this magnetic fluid has an N pole and an S pole. The magnetized particles maintain a certain arrangement distance and an orderly arrangement direction through the action of magnetic force, just like setting a lattice between the magnetized particles. At this time, the fluidity of the magnetic fluid becomes worse and the viscosity increases. The viscosity is related to the degree of magnetization. The lower the degree of magnetization, the weaker the viscosity; the higher the degree of magnetization, the stronger the viscosity.

[0068] The working principle of this viscous damper is to generate an alternating magnetic field through the demagnetization circuit in the demagnetization device to eliminate the original magnetism of the magnetized particles, thereby eliminating the original viscous characteristics of the viscous damper. Then, a pulse current is passed through the magnetizing device to the coil, so that the coil generates a strong magnetic field to magnetize the magnetized particles. After magnetization, the viscous damper has a new viscous characteristic.

[0069] For the existing magnetorheological viscous damper, it is necessary to apply an external magnetic field to the magnetic fluid by energizing the coil so that the magnetorheological viscous damper has a certain viscosity characteristic. When an earthquake occurs, power supply is the most difficult to guarantee. The viscous damper has a demagnetization device and a magnetization device, which makes the magnetic fluid have a certain magnetism before the earthquake occurs and is not affected by power outages.

[0070] The seismic damping structure also includes a longitudinal wave sensor and a control system, wherein the longitudinal wave sensor is used to sense the longitudinal waves generated by earthquakes, and the control system is connected to a demagnetizing device and a magnetizing device to change the viscous characteristics of the viscous damper.

[0071] In order to further illustrate the structure of the anti-vibration damping, the present invention also discloses an anti-vibration control method, which comprises the following steps: S1: Model the industrial building and use software to simulate the movement and torsion of each node under earthquake waveforms of different intensity levels.

[0072] The earthquake waveform can refer to the standard waveform of an earthquake that has occurred, and the software can use finite element shock absorption simulation and analysis software such as PKPM and AN-SYS.

[0073] S2: For nodes with excessive movement and torsion, the viscous characteristics of the corresponding viscous damper are changed to make the movement and torsion of the node meet the safety standards, and the viscous characteristics of the viscous damper and its corresponding severity level are recorded until all nodes meet the safety standards.

[0074] After a building is built, 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 will cause the building to collapse. By changing the viscosity characteristics of the viscous damper, the vibration frequency characteristics of the building can be changed, and the movement and torsion of each node can also meet safety standards.

[0075] 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.

[0076] The propagation speed of seismic longitudinal waves in the earth's crust (5.5-7km / s) is greater than the propagation speed of seismic transverse waves (3.2-4km / s). Transverse waves are shear waves, and their destructiveness to buildings is greater than that of longitudinal waves. Usually, the intensity of longitudinal waves has a certain correlation with the intensity of transverse waves. By measuring the intensity of longitudinal waves, the intensity of transverse waves 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 transverse waves.

[0077] From the above-mentioned earthquake-proof control method, it can be known that through modeling and software simulation, weak nodes under different earthquake magnitudes can be found, and before the arrival of the earthquake shear wave, the viscous damper can have viscous characteristics that match the earthquake intensity level, so as to respond to the destructiveness of the earthquake in a targeted manner and minimize the degree of damage, truly achieving "no collapse in a major earthquake, repairable in a medium earthquake, and no damage in a minor earthquake."

[0078] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the protection scope of the present invention is defined by the attached 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 cross beam, whose ends are supported in the square holes and elastically connected to the square steel columns by leaf springs; 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 according to 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, characterized in that: The crossbeam is an H-shaped crossbeam, and a through-belt 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 through-belt hole.

4. The anti-seismic damping structure of an industrial building as claimed in claim 1, 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.

5. 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.

6. 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.

7. A seismic control method applied to the seismic damping structure as claimed in claim 6, 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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