Damper anti-seismic system and method based on torsional energy consumption of hollow round pipe

Abstract

The invention discloses a damper anti-seismic system and method based on torsional energy dissipation of hollow round pipes. The damper anti-seismic system comprises a frame beam, a frame column, a cantilever wall and a torsional energy dissipation damper. The frame beams and the frame columns are connected with a building, the cantilever walls are connected with the frame beams, and the torsional energy dissipation dampers are arranged between the paired cantilever walls and connected with the cantilever walls to dissipate energy transmitted by the cantilever walls. According to the damper anti-seismic system, the torsional energy dissipation damper is arranged, a metal structure system is adopted, the liquid leakage risk of a traditional viscous damper is avoided, building vibration energy is evenly consumed through ingenious cooperation of a metal structure, and the anti-seismic performance of a building structure is improved. Due to the arrangement of the multi-section type hollow energy dissipation pipe fittings and the paired energy dissipation pipe fittings, the energy dissipation effect of the torsional energy dissipation damper is improved, the stability of the torsional energy dissipation damper is improved, fatigue fracture at the connecting position is avoided, and the service life of the torsional energy dissipation damper is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of building shock absorption, and more particularly to a damper anti-seismic system and method based on hollow circular tube torsional energy dissipation. Background Art

[0002] The most widely used seismic design method in the current engineering shock absorption industry is the use of viscous dampers for structural seismic design. This method is used to improve the seismic resistance of structures under extreme conditions such as earthquakes and wind loads. It is widely used in buildings, bridges, machinery, and other fields. One of the most common applications is in the seismic protection of building frame structures. Viscous dampers are designed on the upper and lower cantilever walls between the frame beams. Under the action of an earthquake, the structure generates inter-story drift angles, which drive the viscous dampers to move. The viscous dampers generate damping force through the flow of internal fluid between pistons, efficiently converting vibration energy into heat energy, thereby significantly reducing the vibration response of the structure. However, a serious problem, and a current pain point in the industry, is the risk of leakage. Viscous dampers rely on the viscous fluid within them to operate. If the seal fails and leaks, it will seriously affect the performance and safety of the damper. The performance of viscous dampers currently used in engineering projects has indeed confirmed this problem. After a period of installation and operation, viscous dampers are prone to widespread leakage, which can lead to a serious decline in the mechanical properties of the damper, or even failure, seriously affecting the seismic performance of the structure and posing a serious safety hazard.

[0003] Therefore, there is an urgent need for a damper seismic resistance system that can not only solve the leakage risk of the viscous damper, but also improve the seismic performance of the building structure and the durability of the damper. Summary of the Invention

[0004] The present invention provides a damper seismic resistance system and method based on the torsional energy dissipation of hollow circular tubes. The system adopts an all-metal structural system, eliminates the risk of viscous fluid leakage, and consumes earthquake energy through the torsional plastic deformation of the hollow circular tubes through the ingenious coordination and operation between the metal components, thereby improving the seismic resistance of the structure.

[0005] The technical solution adopted by the present invention to solve its technical problems is a damper seismic system and method based on hollow circular tube torsional energy dissipation. The damper seismic system is arranged in the frame structure of an earthquake-resistant building to dissipate energy and reduce shock through plastic deformation of components. The damper seismic system and method based on hollow circular tube torsional energy dissipation includes: a frame beam, a frame column, a cantilever wall and a torsional energy dissipation damper;

[0006] The frame beams and frame columns are connected to the building, the cantilever walls are connected to the frame beams, and the torsional energy dissipation dampers are arranged between the paired cantilever walls and are connected to the cantilever walls to dissipate energy transmitted by the cantilever walls.

[0007] Preferably, the torsional energy dissipation damper comprises a pair of torsion tube connecting plates and a pair of energy dissipation components;

[0008] The paired energy-absorbing components are respectively connected to the cantilever walls on the upper and lower sides to dissipate the energy transmitted by the cantilever walls. The paired energy-absorbing components are centrally symmetrically arranged between the paired cantilever walls, and both ends of the paired energy-absorbing components are connected by a pair of torsion tube connecting plates.

[0009] Preferably, the energy dissipation assembly includes a base ear plate, a support rod, an axial force transmission plate and an energy dissipation pipe;

[0010] The base ear plate is fixedly connected to the cantilever wall, one end of the support rod is connected to the base ear plate, the other end of the support rod is connected to one end of the axial force transmission plate, and the other end of the axial force transmission plate is provided with the energy-absorbing pipe.

[0011] Preferably, the energy-absorbing pipe comprises a torsion-resistant plate connecting section, an energy-absorbing section and an axial force transmission section;

[0012] The anti-torsion plate connecting sections are distributed in pairs at both ends of the energy-absorbing pipe fittings and the anti-torsion plate connecting sections are all connected to the torsion tube connecting plates. The axial force transmission section is located at the horizontal center axis of the energy-absorbing pipe fitting and the paired anti-torsion plate connecting sections are symmetrically distributed on both sides of the axial force transmission section. The axial force transmission section is connected to the axial force transmission plate to transmit axial force. The paired energy-absorbing sections are respectively located between the axial force transmission section and the paired anti-torsion plate connecting sections. The anti-torsion plate connecting section, energy-absorbing section and axial force transmission section are all integrally formed.

[0013] Preferably, a through hole penetrating the energy-consuming pipe is provided at the central axis in the vertical direction of the energy-consuming pipe.

[0014] Preferably, the ends of the paired cantilever walls that are close to each other are each provided with embedded parts, and the embedded parts are fixedly connected to the torsional energy dissipation damper.

[0015] The present invention also provides a design method for a damper anti-seismic system, characterized in that the design method for the damper anti-seismic system is used to design the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation, and the design method includes:

[0016] S1. According to the structure of the building and its seismic design requirements, assuming that the building's floor height is H, the spatial installation length of the damper under the frame structure is S, and the external force acting on the damper under the design earthquake is F, then the maximum displacement of the torsional energy dissipation damper is in is the elastic-plastic interlayer displacement angle limit, and to ensure that the torsional energy damper is always in the elastic state for damping work, the cross-sectional dimensions of the support rod are obtained through buckling stability analysis as length L, height h0, width b0 and thickness t0;

[0017] S2. Assuming that the outer diameter of the energy dissipation pipe is R, according to the maximum displacement Δ of the torsional energy dissipation damper max , the outer diameter R of the energy dissipation pipe and the cross-sectional height h0 of the support rod, the length of the lever arm of the torsional energy dissipation damper can be calculated

[0018] S3. Calculate the yield stress σ of the torsional energy dissipation damper based on the yield stress σ obtained from the material property test of the energy dissipation pipe. Wherein r is the through hole radius of the energy dissipation pipe;

[0019] S4. Verification: If F ≥ F s , then proceed to the next step of design. If F<F s Then return to step S2 to redesign the arm of the energy dissipation pipe, the radius of the through hole and the radius of the energy dissipation pipe until F≥F s , where F is the stress on the energy-consuming pipe;

[0020] S5. Based on the welding process requirements of the energy-absorbing pipe, the axial force transmission plate, and the torsion tube connection plate, determine the pipe diameter R0 of the torsion plate connection section and the axial force transmission section of the energy-absorbing pipe, where R0>R;

[0021] S6. The widths of the axial force transmission plate and the torsion tube connection plate satisfy b1>2R0 and b2>2R0, where b1 is the width of the axial force transmission plate and b2 is the width of the torsion tube connection plate;

[0022] S7, assuming that the torsional strain of the energy dissipation pipe is always uniform, then according to the maximum displacement Δ of the torsional energy dissipation damper max , energy dissipation section radius R, energy dissipation pipe arm l n And the allowable strain γ of the energy-dissipating pipe fitting, the energy-dissipating section length δ of the energy-dissipating pipe fitting can be calculated as:

[0023] S8, according to the arrangement position of the paired energy-consuming pipe fittings, determine the spacing B>max{2R0, Δ max +b1}, it can be further obtained that the length of the twisted tube connecting plate is l2>B+2R;

[0024] S9. According to the spatial arrangement and geometric relationship of the torsional energy dissipation damper, in order to ensure normal operation of the components, the length l1 of the axial force transmission plate needs to meet the following requirements:n <l1<l n +h0 / 2+b2 / 2, the thickness of the axial force transmission plate needs to meet t 1上 <b0+2t0, where t 1上 is the thickness of the connection portion between the axial force transmission plate and the support rod;

[0025] S10: If the actual displacement Δ generated by the torsional energy dissipation damper under the action of the external force F is greater than the yield displacement Δ s , it means that the torsional energy dissipation damper can make the energy dissipation pipe enter the yield stage and perform plastic deformation energy dissipation; if the actual displacement Δ generated by the torsional energy dissipation damper under the action of external force F is less than the yield displacement Δ s , indicating that the deformation of the torsional energy dissipation damper under the action of the external force F is very small and does not meet the yield displacement requirement, then return to step S5 and redesign the energy dissipation section length δ of the energy dissipation pipe, the length of the axial force transmission plate, and the length of the torsion tube connection plate until the torsional energy dissipation damper under the action of the external force F Δ ≥ Δ s , end the design;

[0026] S11. Verification: Establish a finite element model of the damper anti-seismic system, use a displacement loading model to simulate the hysteresis energy dissipation performance test of the damper anti-seismic system, extract the force and displacement change curve of the torsional energy dissipation damper in the damper anti-seismic system during the reciprocating motion, draw the hysteresis curve and skeleton curve of the torsional energy dissipation damper, and extract the yield load F obtained by finite element simulation analysis on the skeleton curve. S ′ and yield displacement Δ′ S , compare the yield load F s With F S ′, yield displacement Δ s and Δ′ S The size of the damper is controlled within ±5% to ensure the effectiveness and accuracy of the design of the damper anti-seismic system.

[0027] Preferably, in the step S1, is the elastic-plastic inter-story displacement angle limit. According to the seismic design code, the maximum inter-story displacement angle limit of steel structures in the plastic stage is is 0.02.

[0028] Preferably, in step S2, the cross-sectional height h0 of the support rod is a dimension obtained by performing buckling analysis calculation to ensure that the support rod does not suffer from local and overall buckling instability under the action of the yield load.

[0029] Preferably, in the step S7, the allowable strain γ of the energy-consuming pipe is set to 10%.

[0030] Preferably, in step S10, when the yield force acts on the torsional energy dissipation damper, the energy dissipation pipe enters the yield stage and plastically deforms to dissipate energy, and the yield displacement is calculated as:

[0031] , where I c is the section inertia moment of the axial force transmission plate, I k is the section inertia moment of the torsion tube connecting plate, I n is the section inertia moment of the energy dissipation pipe.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a damper seismic resistance system and method based on hollow circular tube torsional energy dissipation. By setting up a torsional energy dissipation damper and adopting an all-metal structural system, it not only avoids the risk of leakage of traditional viscous dampers, but also evenly consumes the energy of building vibration through the clever coordination of metal structures, thereby improving the seismic resistance of the building structure.

[0034] Moreover, the arrangement of multi-section hollow energy-absorbing pipe fittings and paired energy-absorbing pipe fittings in the torsional energy-absorbing damper further improves the energy-absorbing effect of the torsional energy-absorbing damper. The arrangement of multi-section hollow energy-absorbing pipe fittings not only realizes the stable transmission of torque, but also improves the stability of the torsional energy-absorbing damper, avoids fatigue fracture at the connection, and extends its service life.

[0035] The energy-absorbing components arranged in pairs with central symmetry further balance the forces on both sides of the torsional energy-absorbing damper, making the ultimate tensile and compressive forces on both sides symmetrical while reducing shock, thereby avoiding damage caused by unbalanced tensile and compressive forces on both sides of the torsional energy-absorbing damper, further improving the service life of the torsional energy-absorbing damper, and improving the stability and shock-absorbing performance of the damper anti-seismic system and method based on hollow circular tube torsional energy absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the overall structure of the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation of the present invention;

[0037] Figure 2 Schematic diagram of the energy dissipation pipe structure of the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation of the present invention;

[0038] Figure 3 Schematic diagram of a torsion tube connecting plate of a damper anti-seismic system and method based on hollow circular tube torsional energy dissipation of the present invention;

[0039] Figure 4 Schematic diagram of the structure of the axial force transmission plate of the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation of the present invention;

[0040] Figure 5 Schematic diagram of the structure of the support rod of the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation of the present invention;

[0041] Figure 6 It is a three-dimensional model diagram of the damper anti-seismic system and method based on the torsional energy dissipation of hollow circular tubes of the present invention;

[0042] Figure 7 It is a model diagram of the torsional energy dissipation damper of the damper anti-seismic system and method based on the torsional energy dissipation of the hollow circular tube of the present invention;

[0043] Figure 8 is a finite element calculation hysteresis curve diagram of the torsional energy dissipation damper of the present invention;

[0044] Figure 9 is a finite element calculation skeleton curve diagram of the torsional energy dissipation damper of the present invention;

[0045] Figure 10 This is the yield load and yield displacement extraction diagram of the simulated skeleton curve of the torsional energy dissipation damper of the present invention;

[0046] Figure 11 It is a flow chart of the design method of the damper anti-seismic system and method based on the torsional energy dissipation of hollow circular tubes of the present invention.

[0047] Description of reference numerals:

[0048] 1. Frame column; 2. Frame beam; 3. Cantilever wall; 31. Embedded parts; 4. Base ear plate; 5. Support rod; 6. Axial force transmission plate; 7. Energy dissipation pipe fittings; 8. Torsion tube connection plate; 9. Pin shaft. DETAILED DESCRIPTION

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0050] The following description sets forth numerous specific details to facilitate a thorough understanding of the present invention by those skilled in the art. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0051] In describing the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0053] like Figure 1 and Figure 6 As shown, a damper anti-seismic system and method based on hollow circular tube torsional energy dissipation, the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation includes: a frame beam 2, a frame column 1, a cantilever wall 3 and a torsional energy dissipation damper; the frame beam 2 and the frame column 1 are both connected to the building, the cantilever wall 3 is connected to the frame beam 2, and the torsional energy dissipation damper is arranged between the paired cantilever walls 3 and is connected to the cantilever wall 3 to dissipate the energy transmitted by the cantilever wall 3.

[0054] In this embodiment, the torsional energy dissipation damper is installed between the paired cantilever walls 3, allowing the building's vibrations to be transmitted to the torsional energy dissipation damper through the paired cantilever walls 3. Furthermore, the paired cantilever walls 3 are symmetrically arranged on the upper and lower frame beams 2 to ensure more uniform transmission of external forces, avoiding uneven tensile and compressive stresses on the torsional energy dissipation damper installed between the cantilever walls 3. The torsional energy dissipation damper utilizes an all-metal structural system, which not only avoids the risk of leakage associated with traditional viscous dampers but also evenly dissipates the energy of building vibrations through the clever coordination of the metal structure, thereby improving the building's seismic performance.

[0055] See also Figure 3-Figure 5The torsional energy dissipation damper includes a pair of torsion tube connecting plates 8 and a pair of energy dissipation components; the paired energy dissipation components are respectively connected to the pair of cantilever walls 3 to dissipate the energy transmitted by the cantilever walls 3, and the paired energy dissipation components are symmetrically arranged between the pair of cantilever walls 3, and both ends of the paired energy dissipation components are connected by the pair of torsion tube connecting plates 8. The energy dissipation components include a base ear plate 4, a support rod 5, an axial force transmission plate 6, and an energy dissipation pipe 7; the base ear plate 4 is fixedly connected to the cantilever wall 3, one end of the support rod 5 is connected to the base ear plate 4, the other end of the support rod 5 is connected to one end of the axial force transmission plate 6, and the other end of the axial force transmission plate 6 is provided with an energy dissipation pipe 7.

[0056] In this embodiment, the energy dissipation components are symmetrically arranged in pairs between the paired cantilever walls 3. This allows the energy dissipation pipes 7 within these components to maintain energy dissipation performance while ensuring symmetry in the ultimate tensile and compressive forces of the components, avoiding wear and tear caused by asymmetric tensile and compressive forces, and further improving the stability and energy dissipation performance of the components. The energy dissipation pipes 7 within the paired energy dissipation components of the torsional energy dissipation damper are connected via paired torsion tube connecting plates 8, ensuring the stability and torsion resistance of the energy dissipation pipes 7 and preventing them from falling off, further improving their stability. Furthermore, in this embodiment, the strength of the connection between the torsion tube connecting plates 8 and the energy dissipation pipes 7 is greater than the yield strength of the energy dissipation pipes 7, enabling stable torque transmission.

[0057] Furthermore, in one embodiment, the support rod 5 is preferably a steel support rod 5, one end of which is connected to the base ear plate 4 via a pin 9, and the other end of the support rod 5 is rotationally connected to the axial force transmission plate 6 via a torsion tube rotation pin 9. The support rod 5 ensures that the hollow energy-absorbing circular tube maintains overall stability and local stability under large plastic deformation, and the support rod 5 should work in an elastic state to prevent the rod from becoming unstable before yielding. Its axial force transmission plate 6 is also made of two high yield strength steel plates, which serve as connecting bridges between the steel support rod 5 and the hollow energy-absorbing pipe 7 respectively. Circular mounting holes are opened at both ends of the plate. One end is connected to the steel support rod 5 through a torsion tube rotating pin 9, and the other end is connected to the hollow energy-absorbing pipe 7 by welding the middle axial force transmission section to form a whole. Its main function is to transmit the axial force on the support rod 5 to the energy-absorbing pipe 7, so that the energy-absorbing pipe 7 produces a torsional effect, and ensure that it has sufficient strength to keep the energy-absorbing pipe 7 from deforming and being stable before it undergoes large plastic deformation or damage. When an earthquake occurs, the building frame structure produces an inter-story displacement angle and deforms, generating external force acting on the damper structure, generating axial force in the steel support rod 5, and transmitting it to the axial force transmission plate 6 through the torsion tube rotation pin 9. Through the action of force and lever arm, torque is generated on the energy-absorbing pipe 7, driving the energy-absorbing pipe 7 to undergo torsional deformation. When the stress reaches the yield point of the energy-absorbing pipe 7, the energy-absorbing pipe 7 undergoes plastic deformation to dissipate energy and reduce shock, thereby consuming earthquake energy and maintaining the safety and stability of the main frame structure.

[0058] like Figure 2 As shown, the energy-absorbing pipe 7 includes a torsion-resistant plate connecting section, an energy-absorbing section, and an axial force transmission section; the torsion-resistant plate connecting sections are distributed in pairs at both ends of the energy-absorbing pipe 7 and are connected to the torsion tube connecting plate 8. The axial force transmission section is located at the horizontal center axis of the energy-absorbing pipe 7 and the paired torsion-resistant plate connecting sections are symmetrically distributed on both sides of the axial force transmission section. The axial force transmission section is connected to the axial force transmission plate 6 to transmit axial force. The paired energy-absorbing sections are respectively located between the axial force transmission section and the paired torsion-resistant plate connecting sections. The torsion-resistant plate connecting section, the energy-absorbing section, and the axial force transmission section are all integrally formed. A through hole is provided at the vertical center axis of the energy-absorbing pipe 7, which passes through the energy-absorbing pipe 7. The width of the axial force transmission section is equal to the width of the lower section of the axial force transmission plate 6 where it connects to the energy-absorbing pipe 7.

[0059] In this embodiment, the energy dissipation pipe 7 is made of a hollow steel round tube. The energy dissipation pipe 7 is divided into 5 sections from top to bottom and is symmetrically distributed with the axial force transmission section in the middle. The energy dissipation pipe 7 includes a first anti-torsion plate connecting section (width: t3, round tube forming diameter: R0) + a first energy dissipation section (width: δ, round tube forming diameter: R) + an axial force transmission section (width: t 1下, circular tube forming diameter: R0) + second energy dissipation section (width: δ, circular tube forming diameter: R) + second anti-torsion plate connecting section (width: t3, circular tube forming diameter: R0). Among them, the axial force transmission section is welded to the axial force transmission plate, and the anti-torsion plate connecting sections at both ends are respectively welded to the torsion tube connecting plate 8. The function of the energy dissipation tube 7 is mainly to produce a torsion effect under the action of external force, and to produce plastic deformation to dissipate external energy. The torsion tube connecting plate 8 is made of two pieces of high yield strength steel, and its yield strength is much higher than the yield strength of the energy dissipation tube 7. Circular holes are opened at both ends of the torsion tube connecting plate 8, which are respectively welded to the two energy dissipation tubes 7. The main function is to connect the two torsion tubes, resist the strong torque of the energy dissipation tube 7, and remain unchanged and stable before the energy dissipation tube 7 undergoes large plastic deformation or damage. The pins 9 installed at the ends of the base ear plates 4 are mainly used to install and fix the damper structure on the upper and lower cantilever walls 3 of the frame structure system, serving as the support points for the damper to work and transmit the seismic effects of the frame structure. The support rod 5 and the axial force transmission plate 6 are hingedly connected through the torsion tube rotation pin 9 so that the axial force transmission plate 6 can rotate around the support rod 5 to drive the torsional deformation of the energy-absorbing pipe 7 under the action of external force. Furthermore, the ends of the paired cantilever walls 3 that are close to each other are each provided with embedded parts 31, and the embedded parts 31 are fixedly connected to the torsional energy-absorbing damper. The embedded parts 31 are installed and positioned together when the cantilever wall 3 is cast, forming an integral structure with the cantilever wall 3 to facilitate the positioning and fixation of the base ear plates 4 during installation.

[0060] like Figure 6 As shown, the present invention also provides a design method for a damper anti-seismic system, which is used to design the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation. The design method includes:

[0061] S1. According to the structure of the building and its seismic design requirements, assuming that the building's floor height is H, the spatial installation length of the damper under the frame structure is S, and the external force acting on the damper under the design earthquake is F, the maximum displacement of the torsional energy dissipation damper is in is the limit of the elastic-plastic inter-story displacement angle, and to ensure that the torsional energy dissipation damper is always in the elastic state for shock absorption, the cross-sectional dimensions of the support rod 5 are obtained through buckling stability analysis as follows: length L, height h0, width b0 and thickness t0;

[0062] After completing the calculation and analysis of the main structure of the building, when carrying out the seismic design of the building structure, the seismic design requirements are put forward, that is, the yield load size F of the installed damper s , yield displacement Δ s, the total support length S of the damper, the height H of a single floor, according to the requirements of the building seismic design code "Building Seismic Design Code" (GB50011-2010) and the floor height, the maximum displacement of the damper can be determined in is the limit of elastic-plastic inter-story displacement angle. According to the seismic design code, the maximum inter-story displacement angle of steel structure in the plastic stage is The value is 0.02. The function of the steel support rod 5 is to ensure that the energy dissipation pipe 7 maintains local and overall stability during plastic deformation, energy dissipation, and maximum displacement, preventing instability before yielding and ensuring that it always operates in an elastic state. Therefore, the length and cross-sectional dimensions of the steel support rod 5 can be obtained through buckling analysis: length L, height h0, width b0, and thickness t0.

[0063] S2. Assuming that the outer diameter of the energy dissipation pipe 7 is R, according to the maximum displacement Δ of the torsional energy dissipation damper max , the outer diameter R of the energy dissipation pipe 7 and the cross-sectional height h0 of the support rod 5, the torsional energy dissipation damper can be calculated.

[0064] Among them, the cross-sectional height of the support rod 5 in step S2 is the size obtained by performing buckling analysis to ensure that the support rod 5 does not suffer from local and overall buckling instability under the action of the yield load. In a preferred embodiment, according to the principle of material saving, the arm length l n Take the minimum value that satisfies the conditions.

[0065] S3, according to the yield load F s And the yield stress σ obtained from the material property test of the energy dissipation pipe 7 is used to calculate the yield stress of the torsional energy dissipation damper. Where r is the through hole radius of the energy dissipation pipe;

[0066] In this step, when the energy-consuming pipe fitting 7 is a circular tube, its stress is minimum at the center of the circle and is zero. The farther away from the center of the circle, the greater the stress. Therefore, the energy-consuming pipe fitting 7 is set to be hollow, and a through hole is opened in the middle thereof, so that the material is arranged as far away from the center of the circle as possible, so as to give full play to the performance of the material and save the material consumption. The size of the hollow radius r can be determined as needed, and the size of the outer radius of the energy-consuming pipe fitting 7 can be determined according to the relationship.

[0067] Moreover, in steps S2 and S3, the through hole radius is the inner diameter of the energy-absorbing pipe 7, where R>r, where r is the inner hollow radius of the hollow energy-absorbing circular pipe. The stress of the circular pipe is minimum at the center of the circle and is zero. The farther away from the center of the circle, the greater the stress. Therefore, it is set to be hollow so that the material is arranged as far away from the center of the circle as possible, so as to give full play to the performance of the material and save material consumption.

[0068] S4. Verification of energy-consuming pipe design: If F≥F s , then proceed to the next step of design. If F<F s Then return to step S2 to redesign the arm of the energy dissipation pipe 7, the radius of the through hole, and the radius of the energy dissipation pipe 7 until F≥F s , where F is the stress on the energy dissipation pipe 7;

[0069] In this step, when the external force F received by the damper is greater than or equal to the yield load, it means that the core energy-absorbing pipe 7 of the damper system can enter the yield stage, and the energy-absorbing pipe 7 undergoes plastic deformation to dissipate energy, and the design of the parameters of the next stage can be entered. When the external force F received by the damper is less than the yield load, it means that the energy-absorbing pipe 7 of the damper system cannot enter the yield state and will always remain in the elastic state. It is impossible to perform the torsional plastic deformation of the energy-absorbing pipe 7 to dissipate energy, and the energy-absorbing, anti-vibration and shock-absorbing functions of the damper cannot be exerted. At this time, it is necessary to re-draft the inner and outer diameters of the energy-absorbing pipe 7 or the length of the force arm of the energy-absorbing pipe 7 until F≥F is satisfied. s .

[0070] S5. Based on the welding process requirements of the energy dissipation pipe 7, the axial force transmission plate 6 and the torsion pipe connection plate 8, the pipe diameter R0 of the torsion plate connection section and the axial force transmission section of the energy dissipation pipe 7 is determined.

[0071] S6. Determine the widths of the axial force transmission plate 6 and the torsion tube connection plate 8, b1>2R0 and b2>2R0, where b1 is the width of the axial force transmission plate 6 and b2 is the width of the torsion tube connection plate 8; in this step, b1 and b2 are appropriately integer values ​​based on the geometric design, aesthetics and material saving principles of the plates.

[0072] S7, assuming that the torsional strain of the energy dissipation pipe 7 is always uniform, then according to the maximum displacement Δ of the torsional energy dissipation damper max , the radius R of the energy dissipation section, the arm of the energy dissipation pipe 7 and the allowable strain of the energy dissipation pipe 7, the energy dissipation section length δ of the energy dissipation pipe 7 can be calculated as: In step S7, considering the balance between the energy consumption and low cycle fatigue requirements of the energy dissipation pipe 7 and the maximum displacement requirement of the damper, the allowable strain γ of the energy dissipation pipe 7 is set to 10%.

[0073] S8, according to the arrangement position of the paired energy-consuming pipe fittings 7, determine the spacing B>max{2R0, Δ max +b1}, it can be further obtained that the length of the twist tube connecting plate 8 is l2>B+2R;

[0074] In this step, the value of B satisfies the principles of material conservation and geometric design and is an integer, thereby determining that the length of the torsion tube connecting plate 8 needs to satisfy l2>B+2R. The value is taken as an integer considering the principles of material conservation and geometric design. The thickness of the torsion tube connecting plate 8 needs to match the width of the anti-torsion plate connecting section, and is estimated while considering its own stiffness requirements.

[0075] S9. According to the spatial arrangement and geometric relationship of the torsional energy dissipation damper, in order to ensure the normal operation of each component, the length l1 of the axial force transmission plate 6 needs to meet the following requirements: n <l1<l n +h0 / 2+b2 / 2, the thickness of the axial force transmission plate 6 needs to meet t 1上 <b0+2t0, where t 1上 is the thickness of the connection between the axial force transmission plate 6 and the support rod 5;

[0076] In this step, the upper part of the axial force transmission plate 6 is connected to the support rod 5 through the torsion tube rotating pin 9 to transmit the axial force, and the lower part of the axial force transmission plate 6 is welded to the energy dissipation pipe 7 to apply torque. Therefore, in one embodiment, the force arm of the upper part of the axial force transmission plate 6 is longer, and the plate thickness needs to have sufficient rigidity to transmit the axial force and torque. The plate thickness needs to be thickened. Considering that the upper part is installed inside the steel section through the torsion tube rotating pin 9, the plate thickness needs to meet t 1上 <b0+2t0, and t 1下 It is the welding point between the lower part of the axial force transmission plate 6 and the energy dissipation pipe 7. Its width is consistent with the axial force transmission section of the energy dissipation pipe 7, forming a plate form that is thick at the top and thin at the bottom.

[0077] S10. If the actual displacement Δ generated by the torsional energy damper under the action of external force F is greater than or equal to the yield displacement Δ s , it means that the torsional energy dissipation damper can make the energy dissipation pipe 7 enter the yield stage and perform plastic deformation energy dissipation; if the actual displacement Δ generated by the torsional energy dissipation damper under the action of external force F is less than the yield displacement Δ s , indicating that the deformation of the torsional energy dissipation damper under the action of external force F is very small and does not meet the yield displacement requirement, then return to step S5 and redesign the energy dissipation section length δ of the energy dissipation pipe 7, the length of the axial force transmission plate 6, and the length of the torsion pipe connecting plate 8 until the torsional energy dissipation damper under the action of external force F is Δ≥Δ s , end the design.

[0078] In this step, when the yield force acts on the torsional energy dissipation damper, the energy dissipation pipe enters the yield stage and plastic deformation occurs to dissipate energy. The yield displacement is calculated as:

[0079] , where I cis the section inertia moment of the axial force transmission plate, I k is the section inertia moment of the torsion tube connection plate, I n is the section moment of inertia of the energy dissipating fitting.

[0080] S11. Verification of damper anti-seismic system: Figures 8-10 As shown in the figure, based on the detailed dimensional parameters of the damper components, the material constitutive model of the energy dissipation pipe and the spatial design of the components, a finite element model of the damper system is established (see Figure 7 ), the displacement loading model is used to simulate the hysteresis energy dissipation performance test of the damper, and the force and displacement variation curve of the damper during the reciprocating motion is extracted. Figure 8 and Figure 9 Draw the hysteresis curve and skeleton curve of the damper. The hysteresis curve should be full, showing a good energy dissipation and shock absorption effect. Figure 10 As shown, the yield load F obtained by finite element simulation analysis is extracted on the skeleton curve using the farthest point method. S ′ and yield displacement Δ′ S , compare the yield load F s With F S ′, yield displacement Δ s and Δ′ S The size of the damper should be controlled within ±5% to ensure the effectiveness and accuracy of the design of the damper anti-seismic system.

[0081] In a preferred embodiment, in step S1, is the elastic-plastic inter-story displacement angle limit. According to the seismic design code, the maximum inter-story displacement angle limit of steel structures in the plastic stage is is 0.02.

[0082] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A damper seismic resistance system and method based on hollow circular tube torsional energy dissipation, wherein the damper seismic resistance system is arranged in a seismic-resistant building frame structure to dissipate energy and reduce shock through plastic deformation of components, characterized in that: The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation includes: a frame beam, a frame column, a cantilever wall and a torsional energy dissipation damper; The frame beams and frame columns are connected to the building, the cantilever walls are connected to the frame beams, and the torsional energy dissipation dampers are arranged between the paired cantilever walls and are connected to the cantilever walls to dissipate energy transmitted by the cantilever walls.

2. The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to claim 1 is characterized in that: The torsional energy dissipation damper includes a pair of torsion tube connecting plates and a pair of energy dissipation components; The paired energy-absorbing components are respectively connected to the cantilever walls on the upper and lower sides to dissipate the energy transmitted by the cantilever walls. The paired energy-absorbing components are centrally symmetrically arranged between the paired cantilever walls, and both ends of the paired energy-absorbing components are connected by a pair of torsion tube connecting plates.

3. The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to claim 2 is characterized in that: The energy dissipation assembly includes a base ear plate, a support rod, an axial force transmission plate and an energy dissipation pipe; The base ear plate is fixedly connected to the cantilever wall, one end of the support rod is connected to the base ear plate, the other end of the support rod is connected to one end of the axial force transmission plate, and the other end of the axial force transmission plate is provided with the energy-absorbing pipe.

4. The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to claim 3 is characterized in that: The energy-absorbing pipe comprises a torsion-resistant plate connecting section, an energy-absorbing section and an axial force transmission section; The anti-torsion plate connecting sections are distributed in pairs at both ends of the energy-absorbing pipe fittings and the anti-torsion plate connecting sections are all connected to the torsion tube connecting plates. The axial force transmission section is located at the horizontal center axis of the energy-absorbing pipe fitting and the paired anti-torsion plate connecting sections are symmetrically distributed on both sides of the axial force transmission section. The axial force transmission section is connected to the axial force transmission plate to transmit axial force. The paired energy-absorbing sections are respectively located between the axial force transmission section and the paired anti-torsion plate connecting sections. The anti-torsion plate connecting section, energy-absorbing section and axial force transmission section are all integrally formed.

5. The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to claim 3 is characterized in that: A through hole penetrating the energy-consuming pipe is provided at the central axis in the vertical direction of the energy-consuming pipe.

6. The damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to any one of claims 1 to 5, characterized in that: The ends of the paired cantilever walls that are close to each other are both provided with embedded parts, and the embedded parts are fixedly connected to the torsional energy dissipation damper.

7. A design method for a damper anti-seismic system, characterized in that: The design method of the damper anti-seismic system is used to design the damper anti-seismic system and method based on hollow circular tube torsional energy dissipation according to any one of claims 1 to 6, and the design method includes: S1. According to the structure of the building and its seismic design requirements, assuming that the building's floor height is H, the spatial installation length of the damper under the frame structure is S, and the external force acting on the damper under the design earthquake is F, then the maximum displacement of the torsional energy dissipation damper is in is the elastic-plastic interlayer displacement angle limit, and to ensure that the torsional energy damper is always in the elastic state for damping work, the cross-sectional dimensions of the support rod are obtained through buckling stability analysis as length L, height h0, width b0 and thickness t0; S2. Assuming that the outer diameter of the energy dissipation pipe is R, according to the maximum displacement Δ of the torsional energy dissipation damper max , the outer diameter R of the energy dissipation pipe and the cross-sectional height h0 of the support rod, the length of the lever arm of the torsional energy dissipation damper can be calculated S3. Calculate the yield stress σ of the torsional energy dissipation damper based on the yield stress σ obtained from the material property test of the energy dissipation pipe. Wherein r is the through hole radius of the energy dissipation pipe; S4. Verification of energy-consuming pipe design: If F≥F s , then proceed to the next step of design. If F<F s Then return to step S2 to redesign the arm of the energy dissipation pipe, the radius of the through hole and the radius of the energy dissipation pipe until F≥F s , where F is the axial load on the torsional energy dissipation damper; S5. Based on the welding process requirements of the energy-absorbing pipe, the axial force transmission plate, and the torsion tube connection plate, determine the pipe diameter R0 of the torsion plate connection section and the axial force transmission section of the energy-absorbing pipe, where R0>R; S6. The widths of the axial force transmission plate and the torsion tube connection plate satisfy b1>2R0 and b2>2R0, where b1 is the width of the axial force transmission plate and b2 is the width of the torsion tube connection plate; S7, assuming that the torsional strain of the energy dissipation pipe is always uniform, then according to the maximum displacement Δ of the torsional energy dissipation damper max , energy dissipation section radius R, energy dissipation pipe arm l n And the allowable strain γ of the energy-dissipating pipe fitting, the energy-dissipating section length δ of the energy-dissipating pipe fitting can be calculated as: S8, according to the arrangement position of the paired energy-consuming pipe fittings, determine the spacing B>max{2R0, Δ max +b1}, it can be further obtained that the length of the twisted tube connecting plate is l2>B+2R; S9. According to the spatial arrangement and geometric relationship of the torsional energy dissipation damper, in order to ensure normal operation of the components, the length l1 of the axial force transmission plate needs to meet the following requirements: n <l1<l n +h0 / 2+b2 / 2, the thickness of the upper part of the axial force transmission plate needs to meet t 1上 <b0+2t0, where t 1上 is the thickness of the connection between the axial force transmission plate and the torsion tube rotation pin; S10: If the actual displacement Δ generated by the torsional energy dissipation damper under the action of the external force F is greater than the yield displacement Δ s , it means that the torsional energy dissipation damper can make the energy dissipation pipe enter the yield stage and perform plastic deformation energy dissipation; if the actual displacement Δ generated by the torsional energy dissipation damper under the action of external force F is less than the yield displacement Δ s , indicating that the deformation of the torsional energy dissipation damper under the action of the external force F is very small and does not meet the yield displacement requirement, then return to step S5 and redesign the energy dissipation section length δ of the energy dissipation pipe, the length of the axial force transmission plate, and the length of the torsion tube connection plate until the torsional energy dissipation damper under the action of the external force F Δ ≥ Δ s , end the design; S11. Verification of the damper anti-seismic system: Establish a finite element model of the damper anti-seismic system, use a displacement loading model to simulate the hysteresis energy dissipation performance test of the damper anti-seismic system, extract the force and displacement change curve of the torsional energy dissipation damper in the damper anti-seismic system during the reciprocating motion, draw the hysteresis curve and skeleton curve of the torsional energy dissipation damper, and extract the yield load F obtained by finite element simulation analysis on the skeleton curve. S ′ and yield displacement Δ′ S , compare the yield load F s With F S ′, yield displacement Δ s and Δ′ S The size of the damper is controlled within ±5% to ensure the effectiveness and accuracy of the design of the damper anti-seismic system.

8. The design method of the damper anti-seismic system according to claim 7, characterized in that: In the step S1, is the elastic-plastic inter-story displacement angle limit. According to the seismic design code, the maximum inter-story displacement angle limit of steel structures in the plastic stage is is 0.

02.

9. The design method of the damper anti-seismic system according to claim 7, characterized in that: In step S2, the cross-sectional height h0 of the support rod is a dimension obtained by performing buckling analysis to ensure that the support rod does not buckle locally or globally under the action of the yield load; in step S7, the allowable strain γ of the energy-dissipating pipe is 10%.

10. The design method of the damper anti-seismic system according to claim 7, characterized in that: In step S10, when the yield force acts on the torsional energy dissipation damper, the energy dissipation pipe enters the yield stage, undergoes plastic deformation and dissipates energy, and the yield displacement is calculated as: Among them I c is the section inertia moment of the axial force transmission plate, I k is the section inertia moment of the torsion tube connecting plate, I n is the section inertia moment of the energy dissipation pipe.

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