Arch-shaped energy dissipation and shock absorption supporting device for building

By designing the energy-dissipating and shock-absorbing support device for bow steel pipe structure and low yield point steel, the problems of complex structure and insufficient energy consumption capacity of the existing device are solved, and efficient vibration energy consumption and flexible installation are achieved, which are suitable for building earthquake-resistant design and Reinforcement and transformation.

CN119195536AActive Publication Date: 2024-12-27CHINA CONSTR EIGHTH BUREAU DEV & CONSTR CO LTD

Patent Information

Application Number
CN202411507415.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2024-12-27
Estimated Expiration
2044-10-28

AI Technical Summary

Technical Problem

The existing energy-discharging and shock absorbing devices have complex structures, single energy consumption capacity, high cost, and large space. They cause damage to the facade when reinforcement and renovating the building, and cannot "repair the old as it is."

Method used

A building bow energy-dissipation and shock-absorbing support device is designed, consisting of two cross-welded bow steel pipes. By reasonably designing the radius of curvature and cross-sectional dimensions, low yield point steel and articulated connection methods are used to achieve high energy consumption performance and flexible installation.

Benefits of technology

It has achieved simple and compact structure, convenient installation, superior energy consumption and wide applicability, and can effectively reduce structural dynamic response. It is suitable for new construction and reinforcement and transformation projects, reducing costs and reducing damage to existing structures.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides an arch-shaped energy dissipation and shock absorption supporting device for a building, which belongs to the technical field of building devices and comprises steel columns, steel beams and arch-shaped energy dissipation and shock absorption supports. The steel columns and the steel beams form a frame structure through high-strength bolts or in a welding mode. The arch-shaped energy dissipation and shock absorption support is arranged in the frame structure and is formed by welding two arch-shaped steel pipes in a crossed mode. The structure is simple and compact and installation is convenient and flexible. And secondly, the arch-shaped energy dissipation and shock absorption support has good energy dissipation performance, vibration input energy can be effectively consumed, and the dynamic response of the structure is reduced. Meanwhile, the device is made of low-yield-point steel and has high strain rate sensitivity and excellent fatigue performance. In addition, the arch-shaped energy dissipation and shock absorption support can be compatible with a conventional steel column and steel beam frame, special structural arrangement is not needed, and the actual use requirement of a building is better met. The problem that an existing energy dissipation and shock absorption device is complex in structure is solved.
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Description

Technical Field

[0001] The invention belongs to the technical field of building devices, and in particular relates to a building bow-shaped energy dissipation and shock absorption support device. Background Art

[0002] The earthquake-resistant design of buildings is an important part of construction engineering. At present, reinforced concrete frames, steel frame structures, etc. are commonly used earthquake-resistant systems for buildings. Under strong earthquakes, these structures are prone to plastic deformation and local damage, which can lead to the overall collapse or serious damage of the building. In order to improve the earthquake resistance of buildings, an effective method is to set energy dissipation and shock absorption devices in the frame structure.

[0003] Building structure dampers are mainly divided into velocity-related, displacement-related and other types. Velocity-related dampers: The energy dissipation capacity of this type of damper is related to the velocity, and is usually composed of viscous or viscoelastic materials. Under the action of an earthquake, the characteristics of viscous and viscoelastic materials are used to dissipate seismic energy, and are mainly divided into viscous dampers and viscoelastic dampers. Displacement-related dampers: The energy dissipation capacity of this type of damper is related to the displacement, and is usually composed of materials with good plastic deformation properties. Under the reciprocating action of an earthquake, seismic energy is dissipated through plastic hysteresis energy dissipation, such as mild steel shear dampers, metal bending dampers, buckling restrained braces and friction dampers.

[0004] By installing dampers in certain parts of the building structure, the damping of the structure is increased, the vibration energy under earthquake is consumed, thereby reducing the vibration response and wind-induced vibration of the structure, and improving the stability and comfort of the building.

[0005] However, these devices also have some problems: dampers are prone to temperature sensitivity and fatigue problems, and the energy consumption capacity of a single damper is average. Buildings with high intensity or large buildings often need to be equipped with a large number of dampers, which are expensive and even take up space and affect their use. In addition, when these devices are used in the reinforcement and renovation of buildings, they often cause great damage to the building facades and cannot "repair the old as it was". Therefore, there is an urgent need for a new type of energy dissipation and shock absorption device with a simple and reliable structure, superior performance, easy installation, and wide applicability to meet the needs of modern building seismic design and urban renewal. Summary of the invention

[0006] In view of this, the present invention provides a building bow-shaped energy dissipation and shock absorption support device, which can solve the problem that the current energy dissipation and shock absorption device has a relatively complex structure.

[0007] The present invention is achieved in that:

[0008] The present invention provides a building arched energy dissipation and shock absorption support device, comprising: a steel column, a steel beam and an arched energy dissipation and shock absorption support; the steel column and the steel beam form a frame structure by high-strength bolts or welding; the arched energy dissipation and shock absorption support is arranged inside the frame structure, and the arched energy dissipation and shock absorption support is formed by cross-welding of two arched steel pipes.

[0009] The curvature radius R of the arched energy dissipation and shock absorption support and the support length L satisfy the following relationship:

[0010]

[0011] Where L is the straight-line distance between the support ends, in millimeters; h is the maximum vertical distance from the midpoint of the support to the end line, in millimeters; when the support is designed to be symmetrical, the value range of h is 0.1L≤h≤0.2L.

[0012] The cross-sectional dimensions of the arched energy dissipation and shock absorption support satisfy the following relationship:

[0013]

[0014] Where I is the cross-sectional inertia moment of the support, expressed in millimeters to the fourth power; P cr is the critical buckling force of the support, in Newton; e is the elastic modulus of the support material, in Pascal; the cross section of the support is a rectangular steel tube or H-shaped steel, and the ratio of the flange width b to the web height h satisfies:

[0015] The relationship between the elastic deformation energy of the arched energy dissipation and shock absorption support and the external force satisfies:

[0016]

[0017] Where U is the elastic deformation energy in joules; P is the axial force in Newtons; A is the cross-sectional area of ​​the support in square millimeters; M is the bending moment in Newton millimeters; δ is the axial deformation in millimeters; and θ is the rotation angle in radians.

[0018] The connection nodes between the arched energy dissipation and shock absorption support and the steel beam and steel column are hinged, and the design strength of the connection bolts meets the following requirements:

[0019]

[0020] Where, N v.Rd is the design value of the shear bearing capacity of the bolt, in Newton; α v f is the bolt shear coefficient, which is 0.6 when the bolt grade is 8.8 and 0.5 when the bolt grade is 10.9; ubA is the ultimate strength of the bolt, in MPa; s is the shear cross-sectional area of ​​the bolt, in square millimeters; n s is the number of shear sections; M2 is the resistance partial coefficient of bolt connection, take 1.25.

[0021] The energy dissipation performance of the arched energy dissipation and shock absorption support satisfies:

[0022] E d =πσ y ε y Vξ;

[0023] In the formula, E d is the energy consumption of a single cycle, in joules; σ y is the yield strength of the supporting material, in MPa; ε y is the yield strain of the support material; V is the effective volume of the support, in cubic millimeters; ξ is the equivalent damping ratio, and its value range is 0.15≤ξ≤0.25.

[0024] The arched energy dissipation and shock absorption support is made of low yield point steel, and its material properties meet the following requirements:

[0025]

[0026] In the formula, σ y is the dynamic yield strength, in MPa; σ y0 is the static yield strength, in MPa; is the strain rate, in units of second; As the reference strain rate, 1×10 -3 / second; x is the strain rate sensitivity index, and its value range is 0.1≤n≤0.2.

[0027] Wherein, the fatigue performance of the arched energy dissipation and shock absorption support meets the following requirements:

[0028] N f =C(Δε) -m ;

[0029] Where, N f is fatigue life, in cycles; Δε is strain amplitude; C is material constant, in the range of 1×10 10 ≤C≤5×10 10 ; m is the slope index, and its value range is 3≤m≤4.

[0030] The stability check of the arched energy dissipation and shock absorption support satisfies:

[0031] φ=0.5[1+α(λ-0.2)+λ 2 ];

[0032]

[0033] Where, φ is the intermediate calculated value of the stability coefficient; α is the initial defect coefficient, which is taken as 0.34; λ is the dimensionless slenderness ratio; χ is the stability coefficient, and its value should satisfy χ≤1.0.

[0034] The design displacement response of the arched energy dissipation and shock absorption support satisfies:

[0035]

[0036] In the formula, S d is the design displacement response spectrum, in millimeters; is the vibration acceleration time history, in millimeters per square second; ξ is the structural damping ratio; ω is the circular frequency, in radians per second; t max It is the vibration duration in seconds.

[0037] Compared with the prior art, the beneficial effects of the arched energy dissipation and shock absorption support device for buildings provided by the present invention are:

[0038] First, the device is composed of two crossed arched steel pipes, with a simple and compact structure and convenient and flexible installation. Secondly, the arched energy dissipation and shock absorption support has good energy dissipation performance, which can effectively consume the vibration input energy and reduce the dynamic response of the structure. At the same time, the device uses low yield point steel, which has high strain rate sensitivity and excellent fatigue performance. In addition, the arched energy dissipation and shock absorption support can be directly attached to the existing frame structure without dismantling the wall shape in the plane. It is fast and convenient and more suitable for reinforcement and renovation projects.

[0039] Compared with the prior art, the arched energy dissipation and shock absorption support device of the present invention has the following advantages:

[0040] 1. Simple structure and easy installation: It is composed of two cross-arched steel pipes, the overall structure is compact and can be easily installed inside the steel frame structure.

[0041] 2. Good energy dissipation performance: By rationally designing the geometric dimensions and material properties of the arch support, the vibration input energy can be effectively consumed and the structural dynamic response can be reduced.

[0042] 3. Wide applicability: The appropriate stiffness can be selected according to the specific design intention. Elastic stage,

[0043] It can provide rigidity for the structure; in the elastic-plastic stage, it can be deformed to dissipate energy. It can be directly used in new construction projects, and can also be used in reinforcement and renovation projects. When used in reinforcement and renovation projects, the original structure needs to be dismantled and modified less, with fewer additional devices and low costs.

[0044] 4. Excellent fatigue performance: using low yield point steel, it has high strain rate sensitivity and good fatigue life, and can withstand repeated vibration loads.

[0045] In summary, the present invention solves the problem that the current energy dissipation and shock absorption device has a relatively complex structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the arched energy dissipation and shock absorption support of the building of the present invention;

[0047] Figure 2 It is a schematic diagram of the bow structure;

[0048] Figure 3 It is a curve diagram of the arch support skeleton;

[0049] Figure 4 This is a comparison chart of stress-strain curves of Q345B steel under static and dynamic loading;

[0050] Figure 5 It is the displacement response spectrum comparison diagram;

[0051] The reference numerals in the accompanying drawings include: 1. steel column, 2. steel beam, 3. arched energy dissipation and shock absorption support. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0053] like Figure 1 FIG. 1 is a schematic diagram of a building arched energy dissipation and shock absorption support device provided by the present invention, which mainly consists of three parts: a steel column 1, a steel beam 2, and an arched energy dissipation and shock absorption support 3. The steel column and the steel beam form a frame structure by high-strength bolts or welding, and the arched energy dissipation and shock absorption support is arranged inside the frame structure.

[0054] This device is easy to process and produce, and is convenient for on-site construction. Among them, the cross-shaped arched energy dissipation and shock absorption support is prefabricated and processed in the factory. It is not in the same plane as the beams and columns. It can be hidden or deliberately highlighted in combination with architectural decoration, and has a certain three-dimensional beauty. In particular, by utilizing this spatial dislocation, up to four or more supports can be set at the same time, saving space for other column spans and reducing the impact on the building function. At the same time, this structural form can also be used in reinforcement and renovation projects. It is easy to install and requires little dismantling and reinforcement. The arched energy dissipation and shock absorption support can realize systematization and modularization of factory production, with high processing accuracy, small installation errors and low error rates, which can effectively improve the quality of the building.

[0055] The installation process of the arched energy dissipation and shock absorption support of the building: the arched energy dissipation and shock absorption support 3 is prefabricated in the factory; after on-site positioning, the steel column 1 is first erected on the axis network, and the steel beam 2 is set between the steel columns 1 to form a frame, and then the arched energy dissipation and shock absorption support 3 is positioned and installed to complete the installation.

[0056] The arched energy dissipation and shock absorption support is made of two arched steel pipes welded together. The arched curvature radius R and the support length L satisfy the formula Where h is the maximum vertical distance from the midpoint of the support to the end line. When the support is symmetrical, the value range of h is 0.1L≤h≤0.2L.

[0057] The cross-sectional dimensions of the arched energy dissipation and shock absorption support meet the requirements of the critical buckling bearing capacity, that is, Where I is the section moment of inertia of the support, P cr is the critical buckling force of the support, and E is the elastic modulus of the support material. The support adopts a rectangular steel tube section, and the ratio of the flange width b to the web height g is within the range.

[0058] The relationship between the elastic deformation energy of the arched energy dissipation and shock absorption support and the external force satisfies the formula Where U is the elastic deformation energy, P is the axial force, A is the support cross-sectional area, M is the bending moment, δ is the axial deformation, and θ is the rotation angle.

[0059] The connection between the arched energy dissipation and shock absorption support and the steel beam and steel column adopts a hinged connection, and the design strength of the connecting bolts should meet Where N v.Rd is the design value of the shear bearing capacity of the bolt, α v is the bolt shear coefficient, f ub is the ultimate strength of the bolt, A s is the shear cross-sectional area of ​​the bolt, n s is the number of shear sections, γ M2 is the resistance partial coefficient.

[0060] The energy dissipation performance of the arched energy dissipation and shock absorption support should meet E d =πσ y ε y Vξ, where E d is the single cycle energy consumption, σ y is the yield strength of the supporting material, ε y is the yield strain of the support material, V is the effective volume of the support, ξ is the equivalent damping ratio, and its value range is 0.15≤ξ≤0.25.

[0061] The arched energy dissipation and shock absorption support is made of low yield point steel, and its material properties meet where σy is the dynamic yield strength, σ y0 is the static yield strength, is the strain rate, is the reference strain rate, n is the strain rate sensitivity index, and its value range is 0.1≤n≤0.2.

[0062] The fatigue performance of the arched energy dissipation and shock absorption support should meet N f =C(Δε) -m , where N f is fatigue life, Δε is strain amplitude, and C is material constant, with a value range of 1×10 10 ≤C≤5×10 10 , m is the slope index, and its value range is 3≤m≤4.

[0063] The stability check of the arched energy dissipation and shock absorption support should satisfy φ=0.5[1+α(λ-0.2)+λ 2 ]and Where φ is the intermediate calculated value, α is the initial defect coefficient, λ is the dimensionless slenderness ratio, and χ is the stability coefficient, and its value should satisfy χ≤1.0.

[0064] The design displacement response of the arched energy dissipation and shock absorption support should meet the following requirements: Where S d To design the displacement response spectrum, is the vibration acceleration time history, ξ is the structural damping ratio, ω is the circular frequency, t max To last the vibration.

[0065] Specifically, the principle of the present invention is: the building arched energy dissipation and shock absorption support device of the present invention is mainly composed of three parts: steel columns, steel beams and arched energy dissipation and shock absorption supports. Among them, the steel columns and steel beams form a rigid frame structure by high-strength bolts or welding, and the arched energy dissipation and shock absorption support is installed inside the frame structure. The key to the arched energy dissipation and shock absorption support is to reasonably determine the relationship between its curvature radius R and the support length L. According to mechanical analysis, the arched support will produce axial deformation and bending deformation when subjected to force, and its elastic deformation can be expressed as Under vibration, the arch support will undergo significant plastic deformation, thereby dissipating the vibration input energy through the plastic energy dissipation of the material and reducing the dynamic response of the superstructure. To ensure that the arch support has sufficient compressive stability, its cross-sectional dimensions must meet At the same time, the dynamic mechanical properties of the support material are also key. The use of low-yield point steel can improve its strain rate sensitivity and fatigue performance, thereby further enhancing the energy dissipation and shock absorption effect. In addition, the hinged connection between the arch support and the steel column and steel beam can effectively reduce the internal force transmitted to the main structure and improve the overall seismic performance. At the same time, the device does not need to be arranged in the early stage of structural design, and can be flexibly installed inside the existing frame structure to meet the actual needs of building seismic design.

[0066] In summary, the building bow-shaped energy dissipation and shock-absorbing support device of the present invention can effectively consume vibration input energy, reduce the dynamic response of the building, and improve the overall seismic performance by reasonably designing its geometric parameters, material properties and connection methods. It is a new type of seismic and vibration-absorbing device with simple structure, flexible installation and excellent performance.

[0067] The following is an example of a specific application scenario of the present invention: an office building of a large steel structure manufacturing company in a certain area, the main structure is in the form of a steel frame, with a total of 4 floors, a floor height of 5 meters, a span of 8 meters, and a total of 5×5 spans. The office building was built at the end of the 20th century and has been in use for a long time. Its seismic performance can no longer meet the current use requirements. After seismic appraisal, it was found that the main structure is easily damaged under the action of an earthquake, and faces a large safety hazard.

[0068] In order to improve the seismic performance of the steel frame structure, it was decided to install the arched energy dissipation and shock absorption support device of the present invention inside the existing frame structure. According to the specific conditions of the office building, the main parameters are as follows: each span of the frame is composed of 2 H600×300×12×20 steel columns and 1 H500×300×8×16 steel beam; at the corners of the frame structure, 4 sets of arched energy dissipation and shock absorption supports are set from bottom to top, totaling 20 sets.

[0069] The specific design of the arched energy dissipation and shock absorption support is as follows:

[0070] 1. Geometric parameter design: According to the formula After multiple iterations of calculation, the parameters of the arch support were determined as follows: support length L = 9430 mm, the maximum vertical distance from the midpoint of the support to the end h = 1000 mm, and the corresponding curvature radius R = 11615 mm.

[0071] 2. Section size design: According to the requirements of critical buckling bearing capacity, the section inertia moment I of the arch support should satisfy According to the force calculation, determine the critical buckling force P of the support cr =1500kN, using Q345B steel (E = 2.06 × 10 5 MPa). The cross-sectional dimensions of the support should satisfy I≥4.15×10 6mm^4. After section optimization, the H-shaped steel section of H350×175×7×11 was finally adopted.

[0072] 3. Connection design: The arch support and the steel columns and beams of the frame are connected by hinges. M20 grade 10.9 high-strength bolts are used at the connection. According to the formula where α v =0.5,f ub =1000MPa,A s =245mm 2 ,n s =2,γ M2 =1.25, the design value of the shear bearing capacity of a single bolt can be calculated as N v.Rd =218kN, meeting the connection strength requirements.

[0073] 4. Energy consumption performance design: According to formula E d =πσ y ε y Vξ, using Q345B steel (σ y =345MPa,ε y =0.0017), and ξ = 0.18. After calculation, the single cycle energy consumption of a single set of arch supports is E d =33kJ, the total energy consumption capacity can reach 792kJ, which can effectively consume the vibration input energy.

[0074] 5. Material performance design: Q345B low yield point steel is used to make the arch support, and its dynamic yield strength meets where σ y0 =345MPa, n=0.12. Under the action of vibration, The dynamic yield strength can be increased to 415MPa, further improving the energy dissipation performance of the support.

[0075] 6. Fatigue performance design: According to formula N f =C(Δε) -m , using C = 1.8 × 10 10 , m = 3.2. According to calculations, the arch support can withstand more than 1800 cycles under the design displacement of ±30mm, meeting the requirements of engineering use.

[0076] 7. Stability check: Use the formula φ=0.5[1+α(λ-0.2)+λ 2 ]and The stability check is performed, where α = 0.34. The calculated values ​​are λ = 0.72, φ = 0.92, and χ = 0.84, which meet the stability requirement of χ ≤ 1.0.

[0077] 8. Displacement response analysis

[0078] According to the formula Combined with the vibration acceleration time history of the site where the office building is located And the structural ratio ξ=0.07, the design displacement response spectrum S d =65mm.

[0079] The following describes multiple simulation data in this embodiment based on multiple data charts: Figure 3 The hysteresis representative behavior of the arch support under cyclic load is shown. The horizontal axis represents displacement (mm) and the vertical axis represents force (kN). The curve presents a typical S shape, reflecting the nonlinear mechanical characteristics of the arch support. This hysteresis behavior shows that the arch support has good energy dissipation performance and can effectively dissipate energy under earthquake action, thereby reducing the overall response of the structure. Figure 4 The stress-strain relationship of Q345B steel under static and dynamic loading conditions is shown. The blue curve represents the stress-strain relationship under static loading, and the orange curve represents the relationship under dynamic loading. It can be seen from the figure that under dynamic loading conditions, the steel exhibits a higher yield strength (about 415MPa), which is conducive to improving the energy dissipation performance of the support. Figure 5 The displacement response spectra of the original structure and the modified structure are compared. The blue curve represents the displacement response spectrum of the original structure, and the orange curve represents the displacement response spectrum after modification. As can be seen from the figure, the displacement response of the modified structure in each cycle is reduced, which shows that the installation of the arched energy dissipation and shock absorption support effectively improves the seismic performance of the structure.

[0080] In general, by installing the bow-shaped energy dissipation and shock absorption support device inside the steel structure, its seismic performance has been significantly improved, mainly reflected in:

[0081] 1. Reasonable geometric parameter design makes the arch support have good energy dissipation performance and can effectively reduce the dynamic response under vibration;

[0082] 2. The hinged connection method is adopted to meet the strength requirements and simplify the installation and construction process;

[0083] 3. The support is made of low yield point steel, which has excellent strain rate sensitivity and fatigue properties, ensuring long-term reliability;

[0084] 4. The overall solution is technically simple and widely applicable. It does not require large-scale modifications to existing structures and can meet the seismic requirements of existing buildings.

[0085] Through the above analysis, after the steel structure was transformed with the bow-shaped energy dissipation and shock-absorbing support device, its seismic performance has been greatly improved and achieved the corresponding seismic fortification target.

[0086] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A building arched energy dissipation and shock absorption support device, characterized in that , including: steel columns, steel beams and arched energy dissipation and shock absorption supports; the steel columns and steel beams form a frame structure through high-strength bolts or welding; the arched energy dissipation and shock absorption supports are arranged inside the frame structure, and the arched energy dissipation and shock absorption supports are formed by cross-welding of two arched steel pipes.

2. The building arch-shaped energy dissipation and shock absorption support device according to claim 1 is characterized in that , the curvature radius R of the arched energy dissipation and shock absorption support and the support length L satisfy the following relationship: Where L is the straight-line distance between the support ends, in millimeters; h is the maximum vertical distance from the midpoint of the support to the end line, in millimeters; when the support is designed to be symmetrical, the value range of h is 0.1L≤h≤0.2L.

3. The building arch-shaped energy dissipation and shock absorption support device according to claim 2 is characterized in that , the cross-sectional dimensions of the arched energy dissipation and shock absorption support satisfy the following relationship: Where I is the cross-sectional inertia moment of the support, expressed in millimeters to the fourth power; P cr is the critical buckling force of the support, in Newton; E is the elastic modulus of the support material, in Pascal; the cross section of the support is a rectangular steel tube, and the ratio of the flange width b to the web height h satisfies:

4. The arched energy dissipation and shock absorption support device of the building according to claim 3 is characterized in that , the relationship between the elastic deformation energy of the arched energy dissipation and shock absorption support and the external force satisfies: Where U is the elastic deformation energy in joules; P is the axial force in Newtons; A is the cross-sectional area of ​​the support in square millimeters; M is the bending moment in Newton millimeters; δ is the axial deformation in millimeters; and θ is the rotation angle in radians.

5. The arched energy dissipation and shock absorption support device for buildings according to claim 4 is characterized in that The connection nodes of the arched energy dissipation and shock absorption support and the steel beam and steel column are hinged, and the design strength of the connection bolts meets the following requirements: Where, N v.Rd is the design value of the shear bearing capacity of the bolt, in Newton; α v f is the bolt shear coefficient, which is 0.6 when the bolt grade is 8.8 and 0.5 when the bolt grade is 10.9; ub A is the ultimate strength of the bolt, in MPa; s is the shear cross-sectional area of ​​the bolt, in square millimeters; n s is the number of shear sections; M2 is the resistance partial coefficient of bolt connection, take 1.

25.

6. The building arch-shaped energy dissipation and shock absorption support device according to claim 5 is characterized in that , the energy dissipation performance of the arched energy dissipation and shock absorption support meets: E d =ps y e y Vξ; In the formula, E d is the energy consumption of a single cycle, in joules; σ y is the yield strength of the supporting material, in MPa; ε y is the yield strain of the support material; V is the effective volume of the support, in cubic millimeters; ξ is the equivalent damping ratio, and its value range is 0.15≤ξ≤0.

25.

7. The arched energy dissipation and shock absorption support device for buildings according to claim 6 is characterized in that The arched energy dissipation and shock absorption support is made of low yield point steel, and its material properties meet the following requirements: In the formula, σ y is the dynamic yield strength, in MPa; σ y0 is the static yield strength, in MPa; is the strain rate, in units of second; As the reference strain rate, 1×10 -3 / second; n is the strain rate sensitivity index, and its value range is 0.1≤n≤0.

2.

8. The arched energy dissipation and shock absorption support device for buildings according to claim 7 is characterized in that , the fatigue performance of the arched energy dissipation and shock absorption support meets: N f =C(No) -m ; Where, N f is fatigue life, in cycles; Δε is strain amplitude; C is material constant, in the range of 1×10 10 ≤C≤5×10 10 ; m is the slope index, and its value range is 3≤m≤4.

9. The building arch-shaped energy dissipation and shock absorption support device according to claim 8 is characterized in that , the stability check of the arched energy dissipation and shock absorption support meets the following requirements: φ=0.5[1+α(λ-0.2)+λ 2 ]; Where, φ is the intermediate calculated value of the stability coefficient; α is the initial defect coefficient, which is taken as 0.34; λ is the dimensionless slenderness ratio; χ is the stability coefficient, and its value should satisfy χ≤1.

0.

10. The arched energy dissipation and shock absorption support device for buildings according to claim 1 is characterized in that , the design displacement response of the arched energy dissipation and shock absorption support satisfies: In the formula, S d is the design displacement response spectrum, in millimeters; is the vibration acceleration time history, in millimeters per square second; ξ is the structural damping ratio; ω is the circular frequency, in radians per second; t max It is the vibration duration in seconds.

Citation Information

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