Two-stage amplification damping system and performance calculation method thereof

Abstract

The invention relates to the technical field of building damping, in particular to a two-stage amplification damping system and a performance calculation method thereof, and the system comprises a first-stage amplification assembly, a connecting rod, a second-stage amplification assembly and a spiral viscous damper. In order to solve the problem that the deformation requirement of a building structure on an additional damping system is far smaller than the deformation capacity of a damper under small-amplitude vibration excitation, the energy dissipation performance of the damper under small-amplitude vibration is effectively improved through the displacement amplification effect of the two-stage amplification system. Meanwhile, the invention further provides a calculation method and an installation method of key design parameters of the two-stage amplification damping system, and the method has high practicability and engineering application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building shock absorption, in particular to a two-stage amplification damping system and a performance calculation method thereof. BACKGROUND

[0002] With the continuous improvement of the national industrial level, the high-precision and high-value equipment in industrial plants is increasing, and the anti-vibration / shock performance requirements of building structures under various vibration excitations such as earthquakes and wind loads are also increasing. Although the patent ZL202411704417 proposes a scheme of using a negative stiffness friction damper to improve the anti-vibration / shock performance of the building structure, in actual application, due to the small deformation of the building caused by equipment operation or personnel activity, which is far lower than the effective deformation range of the damper, the damper is difficult to fully exert its energy dissipation capacity when the structure has small amplitude vibration.

[0003] Therefore, in view of the problem of insufficient energy dissipation efficiency of the existing damping system under small amplitude vibration, it is urgent to develop an energy dissipation and efficiency improving technology that can amplify small amplitude displacement and improve the response sensitivity of the damper, so as to realize high-efficiency energy dissipation of the damping system under micro-amplitude vibration working condition. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a two-stage amplification damping system and a performance calculation method thereof; by means of the first-stage and second-stage amplification components, the displacement borne by the spiral viscous damper is amplified step by step, so that when the building structure has small amplitude vibration, the damper can still produce larger deformation response, the energy dissipation capacity and additional damping ratio of the damper are improved, and the vibration / shock control effect of the structure is effectively enhanced.

[0005] The technical solution adopted by the present application to solve its technical problems is:

[0006] A two-stage amplification damping system, comprising a first-stage amplification component, a connecting rod, a second-stage amplification component and a spiral viscous damper; wherein,

[0007] The first-stage amplification component is in the form of a polygonal frame structure composed of a plurality of amplification rods, and a group of opposite connecting nodes in the first-stage amplification component are used for diagonal connection with the frame building structure; the second-stage amplification component is connected between the remaining opposite connecting nodes in the first-stage amplification component through the connecting rod and the spiral viscous damper;

[0008] The secondary amplification assembly comprises an outer stand of a rectangular hollow frame structure, an outer stand middle beam is arranged between the middle parts of the outer stand columns on one side of the outer stand, one end of the connecting rod is connected with the outer stand middle beam and the other end is connected with the primary amplification assembly; an intermediate stand is arranged in the outer stand, spring assemblies are arranged between the upper outer stand beam and the intermediate stand and between the lower outer stand beam and the intermediate stand, and the pre-pressing springs in the spring assemblies are in a compressed state; one end of the helical viscous damper is connected with the intermediate stand and the other end is connected with the primary amplification assembly.

[0009] As preferred, the further technical scheme of the application is:

[0010] Preferably, the upper outer stand beam and the lower outer stand beam are both provided with outer stand limiting notches, and the outer stand limiting notches are circular grooves with smooth concave inner surfaces;

[0011] The intermediate stand comprises an I-beam, the top surface and the bottom surface of the I-beam are both provided with intermediate stand limiting notches, the intermediate stand limiting notch on the top surface is opposite to the outer stand limiting notch on the upper outer stand beam, the intermediate stand limiting notch on the bottom surface is opposite to the outer stand limiting notch on the lower outer stand beam, and the spring assembly is arranged between the intermediate stand limiting notch and the outer stand limiting notch.

[0012] Preferably, the spring assembly further comprises a circular hinge arranged at both ends of the pre-pressing spring, the circular hinge comprises a bearing platform, one side surface of the bearing platform is a smooth convex surface, a limiting hole is arranged on the side surface opposite to the smooth convex surface, and the diameter of the limiting hole is adapted to the outer diameter of the pre-pressing spring.

[0013] Preferably, the front side and the rear side of the outer stand are both provided with cover plates.

[0014] Preferably, the main body of the amplification rod is a circular pipe, transition plates are installed at both ends of the circular pipe, and ear plates are arranged on the outer side surfaces of the transition plates; the primary amplification assembly is composed of four amplification rods, the amplification rods are connected through guide rods arranged between the ear plates, and then the remaining ear plates are connected to form a quadrilateral frame structure.

[0015] Preferably, the amplification connecting piece comprises an amplification piece horizontal plate, an amplification piece vertical plate and an amplification piece connecting plate, the amplification piece vertical plate and the amplification piece horizontal plate are fixed perpendicular to each other, the amplification piece connecting plate is fixed perpendicular to the amplification piece vertical plate and the amplification piece horizontal plate as a rib plate, and the amplification piece connecting plate is provided with through holes adapted to the ear plates.

[0016] Preferably, one end of the connecting rod is provided with a connecting rod mounting thread, an outer stand mounting hole is arranged on the outer stand middle beam, and a thread with a specification adapted to the connecting rod mounting thread is arranged in the outer stand mounting hole; the other end of the connecting rod is provided with a connecting rod ear plate.

[0017] Preferably, the helical viscous damper comprises a front piston, a front gasket, a rear gasket, a rear connecting rod, a damping cylinder and a damping medium;

[0018] The front gasket is installed at the position of the damping cylinder mounting hole at the front end of the damping cylinder, and the rear gasket is arranged inside the damping cylinder and away from the front gasket; one end of the front piston is provided with a piston ear plate, and a piston ear plate hole is formed in the piston ear plate; a piston thread is arranged in the middle of the front piston, and an enlarged ring is installed through the piston thread, the enlarged ring is provided with a flow guide hole and a flow guide groove on the side surface; the front piston is inserted into the inside of the damping cylinder through the damping cylinder mounting hole, the front gasket and the rear gasket in sequence, and is in sliding sealing with the front gasket and the rear gasket; the front gasket, the enlarged ring and the rear gasket divide the inside of the damping cylinder into two cavities, and the cavities are filled with the damping medium; the rear connecting rod is connected to the tail end of the damping cylinder, and the rear connecting rod is provided with a rear connecting rod mounting thread at the end, and the middle frame is provided with a middle frame mounting hole matched with the rear connecting rod mounting thread.

[0019] Preferably, the pre-pressing installation device for pre-pressing the spring assembly comprises an upper clamping holder, a lower clamping holder and a long screw rod; the long screw rod is arranged between the upper clamping holder and the lower clamping holder; upper clamping grooves and lower clamping grooves are respectively arranged on the opposite surfaces between the upper clamping holder and the lower clamping holder; a circular hinge mounting hole is arranged on the side surface of the circular hinge; a mounting screw rod is screwed into the circular hinge mounting hole during pre-pressing; the upper clamping holder and the lower clamping holder are clamped on the mounting screw rods of the two end circular hinges through the upper clamping grooves and the lower clamping grooves, and the distance between the upper clamping holder and the lower clamping holder is reduced through the long screw rod to complete the compression of the pre-pressing spring.

[0020] The application further discloses a performance calculation method of the two-stage amplification damping system, which is applied to the two-stage amplification damping system, sets a connecting rod and a first amplification assembly connection node A in the two-stage amplification damping system as B, a frame building structure comprises top nodes E and C and bottom nodes D and F, a first amplification assembly and a frame building structure connection node is C and D, and specific steps are as follows:

[0021] S1: the distance change between the two end nodes A and the node B in the two-stage amplification damping system is calculated, that is, :

[0022] ;

[0023] Wherein, is the distance between the node A and the node B when the frame building structure does not produce horizontal displacement ; is the distance between the node A and the node B when the frame building structure produces horizontal displacement ; L is the length of the amplification rod; is the included angle between the amplification rod and the center line CD of the amplification assembly. For generating horizontal displacement The angle of change;

[0024] S2: Calculate the displacement boundary relationship of two points C and E of the node:

[0025] ;

[0026] Wherein, The horizontal displacement of the frame structure; The angle between the center line CD of the amplification assembly and the horizontal line;

[0027] S3: Based on the distance change and the displacement boundary relationship, determine the ratio of the lateral displacement of the frame structure to the relative displacement of the two-stage amplification damping system:

[0028]

[0029]

[0030] ;

[0031] S4: Calculate the angle between the pre-compressed spring and the direction perpendicular to the AB line when the relative displacement of the two nodes A and B of the two-stage amplification damping system is :

[0032] ;

[0033] Wherein, ;

[0034] The length of the single pre-compressed spring when the horizontal displacement of the frame structure at both ends is ; The length of the single pre-compressed spring when the frame structure is not deformed;

[0035] S5: Calculate the output of the single pre-compressed spring during movement:

[0036] ;

[0037] Wherein, The stiffness of the pre-compressed spring, The initial compression ratio of the pre-compressed spring, The free length of the pre-compressed spring;

[0038] S6: Calculate the performance curve equation slope of the two-stage amplification assembly based on the angle And the output :

[0039] ​

[0040]

[0041] wherein, is the number of pre-press springs in the two-stage amplification damping system.

[0042] The application has the prominent features that, compared with the prior art:

[0043] In view of the problem that the deformation demand of the additional damping system is far less than the deformation capacity of the damper itself under small amplitude vibration excitation of the building structure, the energy dissipation performance of the damper under micro amplitude vibration is effectively improved through the displacement amplification effect of the two-stage amplification system. Meanwhile, the application also provides a calculation method and an installation method of the key design parameters of the two-stage amplification damping system, and has strong practicability and engineering application value. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a structural schematic diagram of a two-stage amplification damping system in the embodiment of the application;

[0045] Figure 2 is a three-dimensional structural schematic diagram of a two-stage amplification assembly, a connecting rod and a spiral viscous damper part in the embodiment of the application;

[0046] Figure 3 is a connecting structural schematic diagram of a two-stage amplification assembly, a connecting rod and a spiral viscous damper in the embodiment of the application;

[0047] Figure 4 is a structural schematic diagram of an outer stand in the embodiment of the application;

[0048] Figure 5 is a structural schematic diagram of an intermediate stand in the embodiment of the application;

[0049] Figure 6 is a structural schematic diagram of a spring assembly in the embodiment of the application;

[0050] Figure 7 is a structural schematic diagram of a round hinge in the embodiment of the application;

[0051] Figure 8 is a structural schematic diagram of a connecting rod in the embodiment of the application;

[0052] Figure 9 is a structural schematic diagram of a spiral viscous damper in the embodiment of the application;

[0053] Figure 10 is a structural schematic diagram of a front piston in the embodiment of the application;

[0054] Figure 11Figure 3 is a structural schematic diagram of the rear connecting rod and damping cylinder in the embodiment of the present application;

[0055] Figure 12 Figure 4 is a sectional view of the helical viscous damper in the embodiment of the present application;

[0056] Figure 13 Figure 5 is a connection schematic diagram of the primary amplification assembly in the embodiment of the present application;

[0057] Figure 14 Figure 6 is a structural schematic diagram of the amplification connecting piece in the embodiment of the present application;

[0058] Figure 15 Figure 7 is a three-dimensional structural schematic diagram of the wide circular hinge and pre-press installation device in the embodiment of the present application;

[0059] Figure 16 Figure 8 is a side structural schematic diagram of the wide circular hinge and pre-press installation device in the embodiment of the present application;

[0060] Figure 17 Figure 9 is an installation schematic diagram of the double-stage amplification damping system in the embodiment of the present application;

[0061] Figure 18 Figure 10 is a node structure schematic diagram of the double-stage amplification damping system installation in the embodiment of the present application;

[0062] Figure 19 Figure 11 is a deformation comparison principle schematic diagram of the double-stage amplification damping system in the embodiment of the present application;

[0063] Figure 20 Figure 12 is a performance curve diagram of the double-stage amplification damping system in the embodiment of the present application;

[0064] Figure 21 Figure 13 is a seismic frame structure calculation model schematic diagram in which the double-stage amplification damping system is arranged in the embodiment of the present application;

[0065] Figure 22 Figure 14 is a traditional frame structure calculation model schematic diagram in which no damper is arranged in the embodiment of the present application;

[0066] Figure 23 Figure 15 is a selected natural seismic wave ELcentro wave time history curve in the embodiment of the present application;

[0067] Figure 24 Figure 16 is a selected natural seismic wave Qianan wave time history curve in the embodiment of the present application;

[0068] Figure 25 Figure 17 is a selected artificial seismic wave time history curve in the embodiment of the present application;

[0069] Figure 26Figure 2 is a contrastive diagram of maximum displacement of two structures in X and Y directions under EL Centro wave in the embodiment of the present application, wherein the left graph a is X direction and the right graph b is Y direction;

[0070] Figure 27 Figure 3 is a contrastive diagram of maximum interlayer displacement angle of two structures in X and Y directions under EL Centro wave in the embodiment of the present application, wherein the left graph c is X direction and the right graph d is Y direction;

[0071] Figure 28 Figure 4 is a contrastive diagram of maximum displacement of two structures in X and Y directions under Qian'an wave in the embodiment of the present application, wherein the left graph e is X direction and the right graph f is Y direction;

[0072] Figure 29 Figure 5 is a contrastive diagram of maximum interlayer displacement angle of two structures in X and Y directions under Qian'an wave in the embodiment of the present application, wherein the left graph g is X direction and the right graph h is Y direction;

[0073] Figure 30 Figure 6 is a contrastive diagram of maximum displacement of two structures in X and Y directions under artificial wave in the embodiment of the present application, wherein the left graph i is X direction and the right graph j is Y direction;

[0074] Figure 31 Figure 7 is a contrastive diagram of maximum interlayer displacement angle of two structures in X and Y directions under artificial wave in the embodiment of the present application, wherein the left graph k is X direction and the right graph l is Y direction.

[0075] The figure mark explanation: 1, primary amplification component; 2, connecting rod; 3, secondary amplification component; 4, spiral viscous damper; 5, amplification rod; 6, frame building structure; 7, outer stand; 8, outer stand column; 9, outer stand middle crossbeam; 10, middle stand; 11, outer stand crossbeam; 12, spring component; 13, pre-press spring; 14, outer stand limiting notch; 15, I-beam; 16, middle stand limiting notch; 17, round hinge; 18, bearing platform; 19, limiting hole; 20, cover plate; 21, transition plate; 22, lug plate; 23, guide rod; 24, amplification connecting piece; 25, amplification piece cross plate; 26, amplification piece stand plate; 27, amplification piece connecting plate; 28, connecting rod installation thread; 29, outer stand installation hole; 30, connecting rod lug plate; 31, front piston; 32, front sealing gasket; 33, rear sealing gasket; 34, rear connecting rod; 35, damping cylinder; 36, damping medium; 37, damping cylinder installation hole; 38, piston lug plate; 39, piston thread; 40, expansion ring; 41, flow guide hole; 42, flow guide groove; 43, rear connecting rod installation thread; 44, middle stand installation hole; 45, wide round hinge; 46, upper clamping groove; 47, lower clamping groove; 48, long screw rod; 49, upper clamping groove; 50, lower clamping groove; 51, installation thread rod; 52, upper rectangular column; 53, transition section rectangular column; 54, lower rectangular column; 55, stiffener; 56, through-type inner partition plate; 57, node connecting plate. DETAILED DESCRIPTION

[0076] The present application is further described in connection with the specific embodiments illustrated, and is not intended to limit the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made to the specific embodiments without parting from the spirit or scope of the application.

[0077] As shown in the drawings, the embodiment provides a two-stage amplification damping system, which comprises a first amplification assembly 1, a connecting rod 2, a second amplification assembly 3 and a spiral viscous damper 4; wherein, Figures 1 to 18 The first amplification assembly 1 is a polygonal frame structure composed of a plurality of amplification rods 5, and a group of opposite connecting nodes in the first amplification assembly 1 are used for diagonal connection with a frame building structure 6; the second amplification assembly 3 is connected between the remaining opposite connecting nodes in the first amplification assembly 1 through the connecting rod 2 and the spiral viscous damper 4;

[0078] The second amplification assembly 3 comprises an outer stand 7 of a rectangular hollow frame structure, and an outer stand middle cross beam 9 is arranged between the middle portions of the outer stand columns 8 on one side of the outer stand 7; one end of the connecting rod 2 is connected with the outer stand middle cross beam 9, and the other end is connected with the first amplification assembly 1; an intermediate stand 10 is arranged in the outer stand 7, and spring assemblies 12 are arranged between the upper outer stand cross beam 11 and the intermediate stand 10 and between the lower outer stand cross beam 11 and the intermediate stand 10, and the pre-pressing springs 13 in the spring assemblies 12 are in a compressed state; one end of the spiral viscous damper 4 is connected with the intermediate stand 10, and the other end is connected with the first amplification assembly 1.

[0079] In the implementation, the outer stand limiting notches 14 are arranged on the upper outer stand cross beam 11 and the lower outer stand cross beam 11, and the outer stand limiting notches 14 are circular grooves with smooth concave inner surfaces;

[0080] The intermediate stand 10 comprises an I-beam 15, and intermediate stand limiting notches 16 are arranged on the top surface and the bottom surface of the I-beam 15; the intermediate stand limiting notches 16 on the top surface are opposite to the outer stand limiting notches 14 on the upper outer stand cross beam 11, and the intermediate stand limiting notches 16 on the bottom surface are opposite to the outer stand limiting notches 14 on the lower outer stand cross beam 11; the spring assemblies 12 are arranged between the intermediate stand limiting notches 16 and the outer stand limiting notches 14.

[0081]

[0082] ​The spring assembly 12 further comprises a round hinge 17 arranged at both ends of the pre-pressing spring 13, the round hinge 17 comprising a bearing platform 18, one side of the bearing platform 18 being a smooth convex surface, the curvature of the smooth convex surface being consistent with the curvature of the concave surface of each limiting slot, so that the round hinge 17 can be embedded into the corresponding limiting slot, and a limiting hole 19 is arranged on the side opposite to the smooth convex surface, the hole diameter of the limiting hole 19 being adapted to the outer diameter of the pre-pressing spring 13, so that the pre-pressing spring 13 can be closely embedded into the limiting hole 19, and the outer side surface of the pre-pressing spring 13 closely abuts the inner wall of the limiting hole 19.

[0083] The front side and the rear side of the outer stand 7 are both provided with a cover plate 20.

[0084] The main body of the amplification rod 5 is a circular tube, and a transition plate 21 is arranged at both ends of the circular tube, and the outer side surface of the transition plate 21 is provided with an ear plate 22; the first amplification assembly 1 is composed of four amplification rods 5, and the two amplification rods 5 are connected through a guide rod 23 arranged between the ear plates 22, and then the remaining ear plates 22 are connected to form a quadrilateral frame structure.

[0085] The amplification connecting piece 24 comprises an amplification piece horizontal plate 25, an amplification piece vertical plate 26 and an amplification piece connecting plate 27, the amplification piece vertical plate 26 and the amplification piece horizontal plate 25 are fixed perpendicular to each other, the amplification piece connecting plate 27 is fixed perpendicular to the amplification piece vertical plate 26 and the amplification piece horizontal plate 25 as a rib plate, and the amplification piece connecting plate 27 is provided with a through hole adapted to the ear plate 22.

[0086] One end of the connecting rod 2 is provided with a connecting rod mounting thread 28, the outer stand middle cross beam 9 is provided with an outer stand mounting hole 29, and the outer stand mounting hole 29 is provided with a thread adapted to the connecting rod mounting thread 28; the other end of the connecting rod 2 is provided with a connecting rod ear plate 30.

[0087] The screw viscous damper 4 comprises a front piston 31, a front sealing gasket 32, a rear sealing gasket 33, a rear connecting rod 34, a damping cylinder 35 and damping medium 36;

[0088] The front sealing gasket 32 ​​is installed at the damping cylinder mounting hole 37 at the front end of the damping cylinder 35, and the rear sealing gasket 33 is located inside the damping cylinder 35 and away from the front sealing gasket 32; one end of the front piston 31 is provided with a piston lug 38, and the piston lug 38 has a piston lug hole; the middle of the front piston 31 is provided with a piston thread 39, and an enlarged ring 40 is installed through the piston thread 39. The enlarged ring 40 has a guide hole 41 and a guide groove 42 on its side; the front piston 31 passes through the damping cylinder in sequence. Mounting hole 37, front sealing gasket 32 ​​and rear sealing gasket 33 are inserted into the damping cylinder 35 and slide to seal with front sealing gasket 32 ​​and rear sealing gasket 33; front sealing gasket 32, enlarged ring 40 and rear sealing gasket 33 divide the inside of damping cylinder 35 into two cavities, which are filled with damping medium 36; rear connecting rod 34 is connected to the tail end of damping cylinder 35 and the end is provided with rear connecting rod mounting thread 43, and intermediate frame 10 is provided with intermediate frame mounting hole 44 that matches the rear connecting rod mounting thread 43.

[0089] In practice, the installation process of the dual-stage amplification damping system of the present invention is as follows:

[0090] Step 1: Install the helical viscous damper 4.

[0091] First, place the rear sealing gasket 33 inside the damping cylinder 35, ensuring it is far from the damping cylinder mounting hole 37. Then, weld the rear sealing gasket 33 firmly to the inner wall of the damping cylinder 35. Next, calculate the installation position of the front sealing gasket 32 ​​on the front piston 31 in advance, pass the front piston 31 through the front sealing gasket 32, and then screw in the expanding ring 40. After that, place the front piston 31 into the cylinder body of the damping cylinder 35, ensuring it passes through the rear sealing gasket 33, while ensuring the expanding ring 40 is inside the cylinder. Determine the precise volume of the required damping medium 36 based on calculations, inject the corresponding volume of damping medium 36 into the damping cylinder 35, and then slowly push the front piston 31 into the cylinder. At this point, the front sealing gasket 32, the expanding ring 40, and the rear sealing gasket 33 will form two cavities, and the damping medium 36 will flow through these two cavities via the guide hole 41 and the guide groove 42. Slowly adjust the relative positions of the front sealing gasket 32, the enlarging ring 40, and the rear sealing gasket 33 until both cavities are completely filled with the damping medium 36. Finally, secure the front piston 31 and the damping cylinder 35.

[0092] At this point, the installation of the helical viscous damper 4 is complete.

[0093] Step 2: Install the secondary amplification component 3.

[0094] Install the spring assembly 12. First, insert both ends of the preload spring 13 into the limiting holes 19 of the circular hinge 17, ensuring that the outer side of the preload spring 13 is tightly fitted against the inner wall of the limiting hole 19.

[0095] Then, the intermediate frame 10 is placed inside the outer frame 7, and the position is adjusted so that the opening direction of the outer frame limiting slot 14 on the outer frame 7 is opposite to the opening direction of the intermediate frame limiting slot 16 on the intermediate frame 10, and the centers of the smooth concave surfaces of the two are on the same straight line.

[0096] Then, the compression pre-spring 13 is compressed, and one of the round hinges 17 of the spring assembly 12 is embedded into the outer frame limiting slot 14, and the other round hinge 17 is embedded into the opposite intermediate frame limiting slot 16. The operation is repeated in this way to complete the installation of all the spring assemblies 12. Then, the cover plates 20 are welded to the sides of the outer frame 7.

[0097] At this point, the installation of the secondary amplification assembly 3 is completed.

[0098] Step three: the connecting rod 2 is screwed into the outer frame mounting hole 29, and the helical viscous damper 4 is screwed into the intermediate frame mounting hole 44. At this point, the connection between the secondary amplification assembly 3, the connecting rod 2, and the helical viscous damper 4 is completed.

[0099] Step four: the installation of the primary amplification assembly 1 is performed.

[0100] First, the amplification connecting piece 24 is assembled, and the amplification piece vertical plate 26 and the amplification piece horizontal plate 25 are placed perpendicular to each other, and the connection between the two is welded and fixed. Then, the amplification connecting plate 27 is placed perpendicular to the amplification piece vertical plate 26 and the amplification piece horizontal plate 25, and then the parts connected between the three are welded. At this point, the assembly of the amplification connecting piece 24 is completed.

[0101] Then, the guide rod 23 is sequentially inserted through the first ear plate 22 on the amplification rod 5, the amplification connecting plate 27, and the second ear plate 22 on the amplification rod 5, so that the amplification rod 5 and the amplification connecting piece 24 are connected together, and the fixation of one end of the guide rod 23 is completed. Then, the guide rod 23 is inserted through the first ear plate 22 on the other end of the amplification rod 5, the piston ear plate 38 of the helical viscous damper 4, or the mounting hole on the connecting rod ear plate 30, and the second ear plate 22 on the amplification rod 5, and the operation is repeated in this way until the four amplification rods 5 are completely assembled.

[0102] At this point, the installation of the two-stage amplification damping system is completed.

[0103] In the implementation, in order to facilitate the installation of the round hinge 17, a wide round hinge 45 structure as shown in Figure 15 is adopted accordingly, as shown in Figure 15 and Figure 16The pre-pressing installation device for pre-pressing the spring assembly 12 includes an upper clamping holder 46, a lower clamping holder 47, and a long screw rod 48, the long screw rod 48 is arranged between the upper clamping holder 46 and the lower clamping holder 47, and the upper clamping holder 46 and the lower clamping holder 47 are respectively provided with an upper clamping groove 49 and a lower clamping groove 50 on the opposite surfaces, the side surface of the circular hinge 17 is provided with a circular hinge mounting hole, and the circular hinge mounting hole is screwed with a mounting threaded rod 51 during pre-pressing, the upper clamping holder 46 and the lower clamping holder 47 are clamped on the mounting threaded rod 51 of the two end circular hinges through the upper clamping groove 49 and the lower clamping groove 50, and the distance between the upper clamping holder 46 and the lower clamping holder 47 is reduced through the long screw rod 48 to complete the compression of the pre-pressing spring 13, thereby facilitating the installation of the spring assembly 12.

[0104] Specifically, the working process of the spring assembly 12 pre-pressing installation device is as follows: first, the two mounting threaded rods 51 are screwed into the circular hinge mounting holes of the upper and lower circular hinges 17, then the long screw rod 48 is sequentially arranged through the through hole of the upper clamping holder 46 and the bolt hole of the lower clamping holder 47, and the mounting threaded rod 51 is nested into the upper clamping groove 49 and the lower clamping groove 50. Subsequently, the long screw rod 48 is rotated to reduce the distance between the upper clamping groove 49 and the lower clamping groove 50, thereby reducing the distance between the two end circular hinges 17 of the pre-pressing spring 13, and achieving the compression of the pre-pressing spring 13. After the spring assembly 12 is placed in the corresponding limiting notches, the long screw rod 48 is loosened, the upper clamping holder 46 and the lower clamping holder 47 are removed, and the mounting threaded rod 51 is disassembled.

[0105] As shown in the figure, Figure 17 As shown in the figure, Figure 18 As shown in the figure,

[0106] The upper and lower ends of the transition section rectangular column 53 are welded with through-type inner partition plates 56. Subsequently, the lower end of the upper rectangular column 52 and the attached stiffening plate 55 is welded to the upper through-type inner partition plate 56, and the upper end of the lower rectangular column 54 and the attached stiffening plate 55 is welded to the lower through-type inner partition plate 56. Then, the node connecting plate 57 is welded between the two through-type inner partition plates 56, and thus the installation node of the two-stage amplification damping system suitable for the steel structure transfer station support of the rectangular column and the H-shaped steel beam is completed.

[0107] The amplification part vertical plate 26, the amplification part connecting plate 27 and the amplification part horizontal plate 25 of the two-stage amplification damping system of the node are cancelled to be arranged separately, the through inner partition plate 56 is used as the amplification part vertical plate 26 and the amplification part horizontal plate 25, and the stiffening plate 55 is used as the amplification part connecting plate 27, which meets the requirements of the current standard for setting stiffening and inner partition plates at the position of the rectangular beam-column joint, simultaneously serves as the connecting component of the amplification system, and the through setting of the stiffening plate 55 connects the two surfaces of the connecting beam of the rectangular column in the length direction to each other, strengthens the local cross-sectional moment of inertia of the column in the use direction, and improves the seismic performance of the joint.

[0108] In combination Figure 19 And Figure 20 The principle of the two-stage amplification damping system is described:

[0109] The lengths of the four amplification bars 5 AD, DB, CA and BC are , the included angle between the amplification bar 5 and the center line of the amplification assembly is , and the included angle between the center line of the amplification assembly and the horizontal line is .

[0110] Under the action of the earthquake, the interlayer displacement of the building structure is generated, that is, a horizontal displacement of the beam end is generated. At this time, the node C moves towards the direction of the node C1, the node E moves towards the direction of the node E1, and then the relative displacement between the nodes C and D is generated. The relative displacement causes the included angle between the two amplification bars 5 to decrease, and the decrease of the included angle causes the node A at the end of the damping system to move towards the position of the node A1 and the node B to move towards the position of the node B1, and finally causes the distance between the nodes A and B to change, and the change value is At this time, the horizontal displacement of the beam end is converted by the amplification assembly into the relative displacement of the damping system at the two ends in the AB direction, and is greater than , which is the first-stage amplification of the system.

[0111] When the nodes A and B have the relative displacement and their positions are changed to A1 and B1 respectively, the displacement generated at this time drives the intermediate frame 10 to move in the AB direction. The movement of the intermediate frame 10 causes the pre-pressed spring 13 to release the potential energy stored therein, and then the displacement is further increased to , which is the second-stage amplification of the system.

[0112] At this time, the displacement after the two-stage amplification causes the front piston 31 to move in the damping cylinder 35 by The distance between the front piston 31 and the damping cylinder 35 is such that the front piston 31 moves relative to the damping cylinder 35, compressing the damping medium 36 in the chamber on one side of the piston's movement direction, resulting in a pressure difference between the two chambers of the front piston 31. Under the action of the pressure difference, the damping medium 36 enters the other chamber through the guide hole 41 or guide groove 42 located in the chamber on that side. The damping medium 36 will generate a constriction effect when flowing into and out of the guide hole 41 or guide groove 42. At the same time, the damping medium 36 will generate a viscous friction effect when flowing inside the guide hole 41 or guide groove 42. These two effects work together to convert kinetic energy into heat energy and dissipate it.

[0113] When no displacement is applied after two-stage amplification, the theoretical energy dissipation capacity of the helical viscous damper 4 is the area enclosed by points Aa-Ab-Ad-Ac. After the action of the second-stage amplification component 3, the theoretical energy dissipation capacity of the damper expands to the area enclosed by points Ba-Ab-Bd-Ac. After the action of the first-stage amplification component 1, the theoretical energy dissipation capacity of the damper becomes the area enclosed by points Ca-Cb-Cd-Cc.

[0114] from Figure 20 As can be seen from this, the key to calculating the performance of the first-stage amplification component 1 lies in calculating the ratio of the lateral displacement of the structure to the relative displacement at both ends of the helical viscous damper 4, i.e., the amplification factor; the key to calculating the performance of the second-stage amplification component 3 lies in determining the slope of the curve equation of Ba-Ab or Ac-Bd.

[0115] In this regard, the present invention also discloses a performance calculation method for a two-stage amplification damping system, applied to the aforementioned two-stage amplification damping system. The method defines the connection node between the connecting rod 2 and the first-stage amplification component 1 in the two-stage amplification damping system as A, the connection node between the helical viscous damper 4 and the first-stage amplification component 1 as B, and the frame building structure 6 as including top nodes E and C and bottom nodes D and F. The connection nodes between the first-stage amplification component 1 and the frame building structure 6 are C and D. The specific steps are as follows:

[0116] S1: Calculate the change in distance between nodes A and B at both ends of the two-stage amplified damping system, which is... :

[0117] ;

[0118] in, No horizontal displacement was observed in the frame building structure 6. At that time, the distance between node A and node B; To generate horizontal displacement At that time, the distance between node A and node B; L is the length of the amplifying rod 5; The angle between the amplifying rod 5 and the center line CD of the amplifying component; To generate horizontal displacement angle change amount;

[0119] S2: Calculate the displacement boundary relationship of points C and E of the node:

[0120] ;

[0121] wherein, is the horizontal displacement of the frame building structure 6; is the included angle between the center line CD of the amplification assembly and the horizontal line;

[0122] S3: Determine the ratio of the lateral displacement of the frame building structure 6 to the relative displacement of the two ends of the two-stage amplification damping system based on the distance change amount and the displacement boundary relationship:

[0123]

[0124]

[0125] ;

[0126] S4: Calculate the included angle between the pre-press spring 13 and the direction perpendicular to the AB connecting line when the relative displacement of the nodes A and B at the two ends of the two-stage amplification damping system is :

[0127] ;

[0128] wherein, ;

[0129] is the compression length of a single pre-press spring 13 when the horizontal displacement of the frame building structure 6 at both ends is ; is the length of a single pre-press spring 13 when the frame building structure 6 is not deformed;

[0130] S5: Calculate the output of a single pre-press spring 13 during movement:

[0131] ;

[0132] wherein, is the stiffness of the pre-press spring 13, is the initial compression ratio of the pre-press spring 13, is the free length of the pre-press spring 13;

[0133] S6: Calculate the performance curve equation slope of the two-stage amplification assembly 3 based on the included angle and the output :

[0134] ​

[0135]

[0136] wherein, is the number of pre-compression springs 13 in the two-stage amplification damping system.

[0137] Embodiments

[0138] Referring to Figures 21-31 To verify the actual damping effect of the two-stage amplification damping system, a finite element model of a four-story office building with a concrete-filled steel tube frame structure is established using Midas software, and two structural schemes are analyzed: one is a traditional frame structure without dampers Figure 22 , and the other is a damping frame structure with two-stage amplification damping system Figure 21 .

[0139] The building has a plan with 5 spans in the long direction and 3 spans in the short direction, with spans of 6m and 4m respectively, and a story height of 3.6m. In Midas, the beams and columns in the structure use C30 strength grade concrete, and the steel skeleton uses Q235B. The mechanical properties of concrete and steel skeleton materials use the default values provided by the software.

[0140] The first amplification component 1 is simulated by a two-force rod unit, and the second amplification unit 3 and the spiral viscous damper 4 are simulated by a nonlinear connection unit.

[0141] The building design load parameters of the structure are listed in Table 1, with a constant load of 3kN / m2 and a live load of 2kN / m2.

[0142] By comparing the analysis results of the two structures, the damping performance of the two-stage amplification damping system in the actual structure is evaluated.

[0143] Table 1 Frame design parameters

[0144]

[0145] Considering the possible torsional problem of the controlled structure, the two-stage amplification damping system is symmetrically arranged at the edge span. Among them, the long span direction and the short span direction of the structure are each arranged with 16 two-stage amplification damping systems, and the arrangement mode is as shown in Figure 28 , and the parameters of the two-stage amplification damping system are shown in Table 2;

[0146] Table 2 Frame two-stage amplification damping system parameters

[0147]

[0148] Table 3 is the calculated first 6 order periods of two structures, the period of the conventional frame structure is significantly longer than the period of the damping frame structure of the application, the first three order periods of two structures are extracted, wherein the conventional frame structure is 0.511s, 0.457s and 0.409s, the damping frame structure is 0.392s, 0.372s and 0.298s, the period reduction rate (period reduction rate = the difference between the period of the frame structure and the period of the damping structure / the period of the frame structure) of the conventional frame structure compared with the damping frame structure of the application is 23.29%, 18.60% and 27.14% respectively, and the average of the first three order periods is reduced by 23.01%.

[0149] Table 3 first 6 order periods of conventional frame structure and damping frame structure

[0150]

[0151] According to the requirements of the seismic design specification, the time history analysis under rare earthquake is carried out, and the maximum value of the seismic acceleration of two actual strong earthquake records SJB1, SJB2 and an artificial wave RGB shown in the drawing is adjusted to 400cm / s². Figures 23-25

[0152] Figures 26-31 The interlayer displacement and interlayer displacement angle of the conventional frame structure and the damping structure of the application under the multiple occurrence earthquake intensity under two actual strong earthquake records and an artificial wave are given, and the results show that the seismic performance of the damping structure installed with the double-stage amplification damping system is significantly improved compared with the conventional frame structure: the maximum interlayer displacement can be reduced by 37.91%, the maximum interlayer displacement angle can be reduced by 50.52%, and the maximum seismic reduction rate of the top layer acceleration is 37.54%. Therefore, the double-stage amplification damping system has a significant effect on improving the seismic performance of the structure.

[0153] The above only describes the preferred embodiments of the application, and does not limit the scope of the application, and any equivalent changes made by applying the content of the specification and drawings of the application are included in the scope of the application.​

Claims

1. A two-stage amplification damping system, characterized in that, It includes a first-stage amplification assembly, a connecting rod, a second-stage amplification assembly, and a helical viscous damper; among which, The first-stage amplification component is a polygonal frame structure composed of multiple amplification rods. A set of relative connection nodes in the first-stage amplification component is used for diagonal connection with the frame building structure. The second-stage amplification component is connected to the remaining relative connection nodes in the first-stage amplification component through connecting rods and helical viscous dampers. The secondary amplification component includes an outer frame with a rectangular hollow frame structure. A middle crossbeam is installed between the middle of one side of the outer frame column. One end of a connecting rod is connected to the middle crossbeam and the other end is connected to the primary amplification component. An intermediate frame is installed inside the outer frame. Spring assemblies are installed between the upper outer frame crossbeam and the intermediate frame, and between the lower outer frame crossbeam and the intermediate frame. The preloaded springs in the spring assemblies are in a compressed state. One end of a helical viscous damper is connected to the intermediate frame and the other end is connected to the primary amplification component.

2. The two-stage amplification and damping system according to claim 1, characterized in that, Both the upper and lower outer frame crossbeams are equipped with outer frame limiting slots, which are circular slots with smooth concave surfaces. The intermediate frame includes an I-beam. Both the top and bottom surfaces of the I-beam are provided with intermediate frame limiting slots. The intermediate frame limiting slot on the top surface is opposite to the outer frame limiting slot on the upper outer frame crossbeam, and the intermediate frame limiting slot on the bottom surface is opposite to the outer frame limiting slot on the lower outer frame crossbeam. A spring assembly is provided between the intermediate frame limiting slot and the outer frame limiting slot.

3. The two-stage amplification damping system according to claim 2, characterized in that, The spring assembly also includes circular hinges at both ends of the preload spring. Each circular hinge includes a support, one side of which is a smooth convex surface. A limiting hole is provided on the side opposite to the smooth convex surface. The diameter of the limiting hole is adapted to the outer diameter of the preload spring.

4. The two-stage amplification and damping system according to claim 1, characterized in that, Cover plates are installed on both the front and rear sides of the external frame.

5. The two-stage amplification and damping system according to claim 1, characterized in that, The main body of the amplifying rod is a round tube, with transition plates installed at both ends of the round tube. Ear plates are provided on the outer side of the transition plates. The first-stage amplification component consists of four amplifying rods. After the amplifying rods are connected to each other through the guide rods passing between the ear plates, they are connected to each other through the remaining ear plates to form a quadrilateral frame structure.

6. The two-stage amplification and damping system according to claim 5, characterized in that, The enlarged connector includes an enlarged horizontal plate, an enlarged vertical plate, and an enlarged connecting plate. The enlarged vertical plate and the enlarged horizontal plate are fixed perpendicularly to each other. The enlarged connecting plate, as a stiffener, is fixed perpendicularly to both the enlarged vertical plate and the enlarged horizontal plate. The enlarged connecting plate is provided with through holes that are compatible with the ear plates.

7. The two-stage amplification and damping system according to claim 1, characterized in that, One end of the connecting rod is provided with a connecting rod mounting thread, and the crossbeam of the outer frame is provided with an outer frame mounting hole, and the outer frame mounting hole is provided with a thread of a specification that matches the connecting rod mounting thread; the other end of the connecting rod is provided with a connecting rod lug.

8. The two-stage amplification and damping system according to claim 1, characterized in that, The helical viscous damper includes a front piston, a front sealing gasket, a rear sealing gasket, a rear connecting rod, a damping cylinder, and a damping medium; The front sealing gasket is installed at the damping cylinder mounting hole at the front end of the damping cylinder, and the rear sealing gasket is located inside the damping cylinder, away from the front sealing gasket. One end of the front piston is provided with a piston lug plate, and the piston lug plate has a piston lug plate hole. The middle of the front piston is provided with a piston thread, and an enlarged ring is installed through the piston thread. The enlarged ring has a guide hole and a guide groove on its side. The front piston passes through the damping cylinder mounting hole, the front sealing gasket, and the rear sealing gasket in sequence and is inserted into the damping cylinder, and slides and seals with the front sealing gasket and the rear sealing gasket. The front sealing gasket, the enlarged ring, and the rear sealing gasket divide the inside of the damping cylinder into two cavities, which are filled with damping medium. The rear connecting rod is connected to the tail end of the damping cylinder, and the end is provided with a rear connecting rod mounting thread. The intermediate frame is provided with an intermediate frame mounting hole that matches the rear connecting rod mounting thread.

9. The two-stage amplification damping system according to claim 3, characterized in that, It also includes a pre-compression mounting device for pre-compressing the spring assembly. The pre-compression mounting device includes an upper clip, a lower clip, and a long screw. The long screw passes between the upper clip and the lower clip, and upper and lower slots are respectively provided on the opposite surfaces of the upper clip and the lower clip. A circular hinge mounting hole is provided on the side of the circular hinge. During pre-compression, the mounting threaded rod is screwed into the circular hinge mounting hole. The upper clip and the lower clip are engaged with the mounting threaded rods of the circular hinges at both ends through the upper and lower slots. The compression of the pre-compressed spring is completed by reducing the distance between the upper clip and the lower clip through the long screw.

10. A method for calculating the performance of a two-stage amplified damping system, characterized in that, Using the dual-stage amplification damping system according to any one of claims 1 to 9, let A be the connection node between the connecting rod and the first-stage amplification component in the dual-stage amplification damping system, B be the connection node between the helical viscous damper and the first-stage amplification component, and let the frame building structure include top nodes E and C and bottom nodes D and F. Let C and D be the connection nodes between the first-stage amplification component and the frame building structure. The specific steps are as follows: S1: Calculate the change in distance between nodes A and B at both ends of the two-stage amplified damping system, which is... : ； in, No horizontal displacement occurred in the frame building structure. At that time, the distance between node A and node B; To generate horizontal displacement At that time, the distance between node A and node B; L is the length of the amplifying rod; The angle between the amplifying rod and the center line CD of the amplifying component; To generate horizontal displacement Angular change; S2: Calculate the displacement boundary relationship between nodes C and E: ； in, This refers to the horizontal displacement of the frame building structure; The angle between the center line CD of the magnifying component and the horizontal line; S3: Based on the relationship between distance change and displacement boundary, determine the ratio of lateral displacement of the frame building structure to the relative displacement at both ends of the two-stage amplified damping system: ； S4: Calculate the relative displacement between nodes A and B at both ends of the two-stage amplified damped system. At that time, the angle between the preload spring and the direction perpendicular to the line AB is... : ； in, ; The horizontal displacement at both ends of the frame building structure is The length of a single preloaded spring during compression; The length of a single preloaded spring when the frame building structure is undeformed; S5: Calculate the output force of a single preloaded spring during the movement process: ； in, The stiffness of the preloaded spring. This represents the initial compression ratio of the preloaded spring. This is the free length of the preloaded spring; S6: Based on included angle and contribution Calculate the slope of the performance curve equation for the second-stage amplifier component: in, This represents the number of preloaded springs in a two-stage amplification damping system.

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