CN117188638A

CN117188638A - Lever type secondary amplification cantilever truss energy dissipation damping structure for preventing out-of-plane instability

Info

Publication number: CN117188638A
Application number: CN202311030885.5A
Authority: CN
Inventors: 关宇; 王彦开; 卫东; 程俊飞; 周笋; 李仁超; 王雪生; 李培; 金汉�; 陈辉; 白雪; 袁鑫杰
Original assignee: Beijing Institute of Architectural Design Group Co Ltd
Current assignee: Beijing Institute of Architectural Design Group Co Ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2023-12-08

Abstract

The utility model provides a prevent out-of-plane unstability lever secondary amplification type cantilever truss energy dissipation damping structure, including inner tube structure, frame structure and energy dissipation cantilever truss, energy dissipation cantilever truss includes cantilever truss and energy dissipation device, energy dissipation device sets up between cantilever truss and frame structure, energy dissipation device includes once enlargies the portion, secondary enlargies portion and rigidity support, once enlargies the portion and includes the horizontal lever arm, secondary enlargies the portion and includes first subassembly and second subassembly, the structure of first subassembly and second subassembly is the same, all include four equal length amplifier rigidity straight bar props and a horizontal damper that enclose synthetic diamond scissors props, rigidity support portion includes base and two equal length support rigidity straight bar props. According to the application, through the amplification effect and the combined movement of the primary amplification lever and the secondary diamond-shaped scissor-stay mechanism, the deformation displacement or speed of the structure is effectively and doubly amplified, the energy consumption efficiency of the damper is improved, and the performance of the building structure under the action of horizontal load, namely wind load and earthquake is improved.

Description

Lever type secondary amplification cantilever truss energy dissipation damping structure for preventing out-of-plane instability

Technical Field

The application relates to the field of energy consumption of a cantilever truss, in particular to a lever type secondary amplification cantilever truss energy dissipation damping structure for preventing out-of-plane instability.

Background

With the development of socioeconomic and the acceleration of the urban process, the number of high-rise buildings, especially super high-rise buildings, is increasing. In countries with frequent earthquake, the deformation control of the structure under the action of the earthquake load in a high-intensity area is always a difficulty in the design of the super high-rise structure. Meanwhile, due to the increase of the structure height, the problems of increased displacement of the structure under horizontal load and overlarge bending moment of the shear wall or the cylinder body at the upper part of the structure are unavoidable. Conventional design solutions are increasing the cross-sectional size of the components, increasing the number of side force resistant components, reducing the design load, changing the structural form, etc., wherein common solutions are providing a boom truss in a proper position at the structural height. At present, the framework-core tube-cantilever truss structure system is commonly applied to super high-rise structures, so that the energy consumption capability research of the cantilever truss is always a research hot spot in the industry.

The existing research on the energy consumption of the cantilever truss is mainly focused into two parts: 1. the research on the energy consumption of the common cantilever truss, zhao Xianzhong and other Shanghai central mansion, is used as a research background, and a monotone static loading test is performed by selecting a giant column-cantilever truss-girdle truss connecting area and a cantilever truss-core tube connecting area, so that the research shows that the cantilever truss can have the effects of effectively consuming energy and coordinating the deformation of adjacent components; chen Yi and the like test the connection area of the giant column-cantilever truss-girdle truss by adopting various loading path schemes on the basis of the research results of Zhao Xianzhong and the like, and the test shows that the final damage of the test piece occurs at the ends of the diagonal web member and the lower chord member; yan Peng and the like take actual engineering as research objects, and carry out large-scale model hysteresis loading tests on connection nodes of steel tube concrete columns and cantilever trusses which are commonly used in super high-rise buildings, and the tests show that the truss nodes have obvious energy consumption effects; yang Qingshun and the like adopt a 1:3 ratio scale test, and researches show that the common cantilever test piece web member is bent integrally, the chord member is bent and yielded, and the defects of high bearing capacity degradation speed, poor ductility and insufficient energy consumption capability exist; 2. the web members of the common cantilever truss are replaced by BRB (bridge beam) in the study of the energy-consumption cantilever truss, yang Qingshun and the like, and test results show that the BRB can effectively improve the earthquake resistance and energy consumption capacity of the structure; zhou Y, et al research results show that the adoption of BRB as the web member of the cantilever truss can effectively improve the energy consumption capability of the cantilever truss in rare earthquakes; the research results of Jingzhui and Xing Lili show that the BRB cantilever truss can fully exert the energy consumption capability under the action of the re-horizontal.

For the framework-core tube-cantilever truss structure system, the cantilever truss is limited by self materials, relative deformation of the inner tube and the outer tube and the like, so that the energy consumption capability of the structure system is limited. In order to solve the problems, in recent years, students commonly adopt the energy dissipation and shock absorption device arranged in the cantilever truss to achieve the purpose of absorbing horizontal load, namely wind load and earthquake action. The existing energy dissipation and shock absorption device usually utilizes the horizontal shear deformation of the structure to realize energy consumption, and the deformation characteristic of the super high-rise structure is that the proportion of the bending deformation of the upper floor is increased layer by layer, and the proportion of the harmful shear deformation is reduced layer by layer, so that the effect of utilizing the horizontal interlayer shear deformation to consume energy is limited. The frame-core tube-cantilever truss structure system is characterized in that the system coordinates the stress between the outer frame and the inner barrel through the cantilever truss so as to resist the overturning bending moment. The cantilever truss has larger vertical deformation under the action of horizontal load, namely wind load and earthquake, so that the cantilever truss is an ideal energy consumption part.

The existing energy dissipation cantilever truss has the defects that: the relative displacement or the rotation angle generated between different structural members of the framework-core tube-cantilever truss structure system is smaller under the action of horizontal load, namely wind load and earthquake, so that the energy consumption and shock absorption effects of the energy dissipater are further affected. Meanwhile, the existing energy consumption device occupies a large building area as a whole, and influences the service efficiency of building space.

Disclosure of Invention

The application aims to provide a lever type secondary amplification cantilever truss energy dissipation damping structure for preventing out-of-plane instability, which aims to solve the technical problem that the relative displacement or rotation angle generated between different structural members is smaller under the action of horizontal load, namely wind load and earthquake, so that the energy dissipation and damping effects of an energy dissipater are affected; the technical problem that the use efficiency of the building space is affected due to the fact that the existing energy consumption device occupies a large building area as a whole is solved.

In order to achieve the above purpose, the application adopts the following technical scheme:

an out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure comprises an inner cylinder structure, an outer frame structure and an energy dissipation cantilever truss arranged between the inner cylinder structure and the outer frame structure,

the outer frame structure comprises an outer frame column, a lower layer steel bracket and an upper layer steel bracket, wherein the lower layer steel bracket and the upper layer steel bracket are respectively and vertically and fixedly connected at the inner side of the outer frame column and positioned in the same vertical plane with the energy dissipation cantilever truss,

the energy dissipation cantilever truss comprises a cantilever truss and an energy dissipation device of the cantilever truss, the cantilever truss is positioned in a vertical plane and is vertical to the inner cylinder structure, the inner end of the cantilever truss is fixedly connected to the outer wall of the inner cylinder structure, the energy dissipation device is arranged between the cantilever truss and the outer frame structure,

the energy dissipation device and the cantilever truss are positioned in the same vertical plane and comprise a primary amplifying part, a secondary amplifying part and a rigid support part,

the primary amplifying part comprises a horizontal lever arm, wherein the inner end is hinged with the outer end of the cantilever truss, the outer end is hinged with the secondary amplifying part,

the secondary amplifying part is positioned at the outer side of the primary amplifying part and comprises an upper half component and a lower half component, the upper half component and the lower half component have the same structure and comprise four equal-length amplifier rigid straight rod supports which encircle the rhombic scissor support and a horizontal damper, the end parts of the two amplifier rigid straight rod supports at the four corners of the rhombic are connected in a hinged manner, the end part connecting points of the two horizontally aligned rhombic scissor supports are respectively an inner connecting point and an outer connecting point, the horizontal damper is positioned in a rhombic plane, the two ends of the horizontal damper are connected in a hinged manner with the inner connecting point and the outer connecting point, the two vertically aligned rhombic end part connecting points are respectively an upper connecting point and a lower connecting point, the upper connecting point of the upper half component is connected with the bottom of the upper layer steel bracket in a hinged manner, the lower connecting point of the upper half component is connected with the upper connecting point of the lower half component in a hinged manner, namely the midpoint of the secondary amplifying part, the lower connecting point of the lower half component is connected with the top of the lower layer steel bracket in a hinged manner,

the rigid support seat is positioned below the primary amplifying part and above the lower steel bracket and comprises a base and two rigid support straight rod supports with equal length, the base is fixedly connected to the top end of the lower steel bracket, the upper ends of the two rigid support straight rod supports are hinged to the primary amplifying part through the same hinge point, the lower ends of the two rigid support straight rod supports are separated and respectively hinged to the inner end and the outer end of the base, and the base and the two rigid support straight rod supports form an isosceles triangle, so that the rigid support straight rod supports serve as the stationary hinge support of the primary amplifying device.

The outer end of the primary amplifying part is hinged with the midpoint of the secondary amplifying part.

The energy dissipation device further comprises an out-of-plane instability prevention part, the out-of-plane instability prevention part and the horizontal lever arm are arranged on the same elevation, the energy dissipation device comprises an out-of-plane stability baffle and a sliding layer, the out-of-plane stability baffle is provided with two blocks in total, the outer end of the out-of-plane stability baffle is fixedly connected to the inner side of an outer frame column, the inner end of the out-of-plane stability baffle is clamped at the left side and the right side of the midpoint of the secondary amplification part, the sliding layer is arranged on one side of the out-of-plane stability baffle, facing the midpoint of the secondary amplification part, of the out-of-plane stability baffle, and the sliding layer contacts with one side, facing the midpoint of the secondary amplification part, of the out-of-plane stability baffle.

The horizontal damper is a viscous fluid damper, a shearing type metal damper or a friction type damper.

All hinged connections are pin shaft connections with holes.

The outer end of the cantilever truss is provided with a cantilever truss lug plate, and the inner end of the primary amplifying part is hinged with the cantilever truss lug plate.

The bottom of upper steel corbel is equipped with upper steel corbel otic placode, and the upper junction and the upper steel corbel otic placode of upper half subassembly are articulated to be connected, the top of lower floor steel corbel is equipped with lower floor steel corbel otic placode, and the lower junction and the lower floor steel corbel otic placode of lower half subassembly are articulated to be connected.

The sliding layer is made of polytetrafluoroethylene materials.

The elevation of the hinged connection position of the lower connection point of the lower half component and the top of the lower steel bracket is equal to the elevation of the hinged connection position of the lower end of the rigid straight rod support of the support and the base,

the elevation of the midpoint of the secondary amplifying part is equal to the elevation of the hinged connection position of the upper end of the rigid straight rod support of the support and the primary amplifying part.

Compared with the prior art, the application has the following characteristics and beneficial effects:

the application is characterized in that:

aiming at the defect that the displacement amplification effect is not obvious in the damping arm extension device of the current structure, as the structure does not allow larger deformation or speed to occur, in order to fully exert the energy consumption effect of the damper, the deformation or speed of the structure needs to be amplified by adopting an amplification device, so that the damper consumes more energy effectively. Aiming at the difficult problem, a high-efficiency secondary amplification damper structure is provided. The application can make the damper generate larger displacement or speed by the amplifying effect, namely, the first amplifying of the initial displacement is completed by the displacement amplifying lever, the second amplifying of the first amplifying displacement is completed by the diamond-shaped scissor-stay mechanism, thereby solving the defect that the damper can not fully exert the energy consumption function in the micro displacement deformation, and the structure deformation displacement or speed is effectively and doubly amplified by the combined movement of the first amplifying lever and the second diamond-shaped scissor-stay mechanism. The application can effectively improve the energy consumption efficiency of the damper and greatly improve the performance of the building structure under the horizontal load, namely wind load and earthquake action. Meanwhile, the application has the characteristics of simple structure, convenient installation, small influence on building functions, convenient replacement and the like, thereby having wide development and application prospects.

The method has the following specific beneficial effects:

1. in a high-rise building, under the action of earthquake and wind load, when the inner core tube is bent and deformed, the outer end part of the cantilever truss moves up and down to generate vertical deformation, and the primary amplifying part amplifies the vertical deformation difference and the speed difference once by utilizing the lever principle; the secondary amplifying part converts the vertical deformation after primary amplification into secondary amplified horizontal displacement through the displacement of the rigid connecting rod; the secondary amplified horizontal displacement enables the viscous fluid damper to generate viscous damping force energy consumption, so that the earthquake energy is effectively dissipated, and the earthquake response of the main structure is lightened.

2. Compared with the direct combination of the traditional damper and the traditional cantilever truss, the device can further increase the energy consumption of the damper in super high-rise buildings, greatly improve the additional damping ratio of the structure under the action of earthquake and wind load, ensure the safety of the structure, reduce the number of the dampers and further reduce the construction cost. The connection of the cantilever truss and the outer frame is hinged together through the rigid connecting rod to form a 'limited rigidity reinforcing layer'. Therefore, the rigidity of the limited rigidity reinforcing layer is improved less, namely the internal force of the structure is not increased sharply, and the rigidity mutation is not caused to form a weak layer, so that the structure can present a ductile yielding mechanism of strong column and weak beam and strong shear and weak bending under the action of rare earthquakes.

3. An out-of-plane stable baffle is arranged at the connecting position of the primary amplifying part and the secondary amplifying part, and the out-of-plane stable baffle, the bracket ear plate and the rigid support are used for jointly preventing lateral instability of the primary amplifying part and the secondary amplifying part.

4. Compared with the common mode of arranging the vertical damper at the end part of the reinforcing layer cantilever truss, the displacement amplification factor of the application is about 32 times of that of arranging the vertical damper at the end part of the reinforcing layer cantilever truss, and the application has good damping effect and high working efficiency.

Drawings

The application is described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of the present application.

Fig. 2 is a schematic diagram of the front view structure of the present application.

Fig. 3 is a detailed enlarged view of the out-of-plane instability prevention portion at the midpoint of the secondary amplification portion.

Fig. 4 is an enlarged detail of fig. 3 with the front outer stabilizing baffle removed.

Fig. 5 is another angular schematic view of fig. 4.

Fig. 6 is a schematic view of the outside angle at the midpoint of the secondary enlarged portion in fig. 4.

Fig. 7 is a schematic diagram of the connection of the upper half assembly.

Fig. 8 is a schematic connection of the lower half assembly.

Fig. 9 is a schematic illustration of the connection of the lower module half to the underlying steel corbel.

Fig. 10 is a schematic illustration of the connection of the upper module half to the upper steel corbel.

Fig. 11 is a schematic diagram showing the connection between the rigid mount section and the primary amplifying section.

Fig. 12 is a schematic view of the connection of the rigid support section to the underlying steel corbel.

Fig. 13 is a schematic view of the connection of the primary amplifying section to the boom truss.

Fig. 14 is a schematic diagram one.

Fig. 15 is a schematic diagram two.

Reference numerals: the device comprises a 1-outer frame column, a 2-lower steel bracket, a 21-lower steel bracket lug plate, a 3-upper steel bracket, a 31-upper steel bracket lug plate, a 4-inner cylinder structure, a 5-cantilever truss, a 51-cantilever truss lug plate, a 6-primary amplifying part, a 7-secondary amplifying part, a 71-amplifier rigid straight rod support, a 72-horizontal damper, a 73-secondary amplifying part midpoint, a 7 a-upper half component, a 7 b-lower half component, an 8-rigid support part, a 81-base, a 82-support rigid straight rod support, a 9-out-of-plane instability prevention part, a 91-out-of-plane stable baffle, a 92-sliding layer and a 10-pin shaft.

Detailed Description

1-2, an out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure comprises an inner cylinder structure 4, an outer frame structure and an energy dissipation cantilever truss arranged between the inner cylinder structure and the outer frame structure.

The outer frame structure comprises an outer frame column 1, a lower layer steel bracket 2 and an upper layer steel bracket 3, wherein the lower layer steel bracket 2 and the upper layer steel bracket 3 are respectively and vertically fixedly connected to the inner side of the outer frame column 1 and are positioned in the same vertical plane with the energy dissipation cantilever truss. The steel corbel is connected with the outer frame column through full penetration welding.

In this embodiment, the present application is applied to a frame-core tube-cantilever truss structure system, and in other embodiments, the inner and outer tube forms and the bracket forms are not limited to the forms described in the present application.

The energy dissipation cantilever truss comprises a cantilever truss 5 and an energy dissipation device of the cantilever truss 5, wherein the cantilever truss 5 is positioned in a vertical plane and is perpendicular to the inner cylinder structure 4, the inner end of the energy dissipation device is fixedly connected to the outer wall of the inner cylinder structure 4, and the energy dissipation device is arranged between the cantilever truss 5 and the outer frame structure. In other embodiments, the boom truss arrangement is not limiting to the form described herein.

The energy dissipation device and the cantilever truss 5 are positioned in the same vertical plane and comprise a primary amplifying part 6, a secondary amplifying part 7 and a rigid support part 8.

Referring to fig. 1-2, 5-6 and 13, the primary amplifying section 6 comprises a horizontal lever arm, the pivot point is free to rotate, the inner end of the primary amplifying section 6 is hinged with the outer end of the cantilever truss 5, and the outer end of the primary amplifying section is hinged with the secondary amplifying section 7.

Referring to fig. 1-2, 4 and 6-10, the secondary amplifying part 7 is located at the outer side of the primary amplifying part 6, and includes an upper half component 7a and a lower half component 7b, the upper half component 7a and the lower half component 7b have the same structure, and each include four equal-length amplifier rigid straight bar struts 71 enclosing a diamond-shaped scissor support and a horizontal damper 72, the end connections of the two amplifier rigid straight bar struts 71 at four corners of the diamond-shaped scissor support are all hinged, two horizontally aligned diamond-shaped end connection points are respectively an inner connection point and an outer connection point, the horizontal damper 72 is located in a diamond-shaped plane, two ends of the horizontal damper 72 are hinged with the inner connection point and the outer connection point, two vertically aligned diamond-shaped end connection points are respectively an upper connection point and a lower connection point, the upper connection point of the upper half component 7a is hinged with the bottom of the upper layer steel bracket 3, the lower connection point of the upper half component 7a and the upper connection point of the lower half component 7b are the same hinge point, namely the secondary amplifying part midpoint 73, and the lower connection point of the lower half component 7b is hinged with the top of the lower layer steel bracket 2.

The horizontal damper 72 is a viscous fluid damper, a shear type metal damper or a friction type damper, and the bending deformation of the inner cylinder structure is converted into the axial deformation of the viscous fluid damper through the secondary amplifying part after being amplified. The viscous fluid damper is a speed-dependent damper, and consumes energy through the speed deformation difference at the two ends. The viscous fluid damper is a speed-related damper with large deformation characteristics, can meet the requirements of rare earthquakes and large deformation under rare earthquakes, and forms an effective damping system. In other embodiments, the horizontal damper types are not limited to the types listed in the present application.

Referring to fig. 1-2 and 11-12, the rigid support portion 8 is located below the primary amplifying portion 6 and above the lower steel bracket 2, and includes a base 81 and two rigid support straight bar supports 82 with equal length, where the base 81 is fixedly connected to the top end of the lower steel bracket 2, and in this embodiment, the base is a base plate ear plate vertically arranged and is perpendicular to the lower steel bracket. The upper ends of the two support rigid straight bar supports 82 are hinged with the primary amplifying part 6 through the same hinge point, the lower ends of the two support rigid straight bar supports 82 are separated and respectively hinged on the inner end and the outer end of the base 81, and the base 81 and the two support rigid straight bar supports 82 form an isosceles triangle, so that the support rigid straight bar supports 82 are used as the stationary hinge supports of the primary amplifying device.

Referring to fig. 1-4, the energy dissipation device further includes an out-of-plane instability prevention portion 9, where the out-of-plane instability prevention portion 9 and the horizontal lever arm are disposed on the same elevation, and the energy dissipation device includes an out-of-plane stability baffle 91 and a sliding layer 92, where the out-of-plane stability baffle 91 is provided with two blocks, an outer end of the out-of-plane stability baffle 91 is fixedly connected to an inner side of the outer frame column 1, an inner end of the out-of-plane stability baffle 91 is clamped at left and right sides of a midpoint 73 of the secondary amplification portion, one side of the out-of-plane stability baffle 91 facing the midpoint 73 of the secondary amplification portion is provided with the sliding layer 92, and one side of the sliding layer 92 facing the midpoint 73 of the secondary amplification portion contacts with one side facing the midpoint 73 of the secondary amplification portion. The out-of-plane stabilizing baffle 91 is connected with the outer frame column through full penetration welding; the out-of-plane stabilizing baffle 91 only plays a role in restraining the out-of-plane instability of the amplifying device, and the restraining effect on the truss plane of the amplifying device is released by setting polytetrafluoroethylene materials, so that the energy consumption effect of the device is guaranteed. The sliding layer 92 is polytetrafluoroethylene material. In other embodiments, the out-of-plane stabilizing baffle forms are not limiting to the forms described herein.

Referring to fig. 4-13, an ear plate may be provided where all hinged connections are pin 10 connections with openings. The primary amplifying part and the secondary amplifying part of the application are connected with the outer frame column, the cantilever truss and the steel corbel of the main body structure through the pin shafts, and the connection between the parts is convenient and the structure is simple. Each part has good in-plane and out-of-plane stability, so that the large-vibration elastic working state can be realized, and the bending deformation of the large-vibration core tube can be converted into the axial deformation of the damper without loss;

referring to fig. 13, in this embodiment, the outer end of the boom truss 5 is provided with a boom truss ear plate 51, and the inner end of the primary amplifying section 6 is hinged to the boom truss ear plate 51.

Referring to fig. 3-6, in this embodiment, the outer end of the primary amplifying section 6 is hingedly connected to a secondary amplifying section midpoint 73.

Referring to fig. 10, an upper steel bracket ear plate 31 is arranged at the bottom of the upper steel bracket 3, an upper connection point of the upper half component 7a is hinged with the upper steel bracket ear plate 31, a lower steel bracket ear plate 21 is arranged at the top of the lower steel bracket 2, and a lower connection point of the lower half component 7b is hinged with the lower steel bracket ear plate 21.

Referring to fig. 2, the elevation of the hinged connection position of the lower connection point of the lower half assembly 7b and the top of the lower steel corbel 2 is equal to the elevation of the hinged connection position of the lower end of the support rigid straight bar support 82 and the base 81.

Referring to fig. 2, 6 and 11, the elevation of the midpoint 73 of the secondary amplifying part is equal to the elevation of the hinged connection position of the upper end of the rigid straight rod support 82 of the support and the primary amplifying part 6, so as to ensure the energy dissipation effect.

In this embodiment, the working mechanism of the lever type secondary amplification cantilever truss energy dissipation damping structure for preventing out-of-plane instability is as follows:

see fig. 14-15, wherein: delta ₁ The outer end vertical deformation value of the frame, namely the relative vertical deformation difference value of the outer frame structure and the inner barrel structure, is trussed for the cantilever; r is (r) ₁ The length value of the side of the horizontal lever arm, which faces the inner cylinder structure; r is (r) ₂ The length value of the side of the horizontal lever arm adjacent to the outer frame structure; delta ₂ The axial deformation difference value of the diamond-shaped scissors support is; delta ₃ Is the axial deformation value of the horizontal damper; d (D) ₁ The axial length of the diamond-shaped scissors support; l (L) ₁ Is the horizontal damper axial length.

From the geometric analysis it is possible to:

δ ₂ =(r ₂ /r ₁ )δ ₁ （1-1）

δ ₃ =(D ₁ /L ₁ )δ ₂ （1-2）

in summary, it is possible to obtain:

δ ₃ =(D ₁ /L ₁ )(r ₂ /r ₁ )δ ₁ （1-3）

the device diagram shows that the rhombic scissors support are two sets of vertically symmetrical arrangement, and the final amplification effect is twice that of one set.

Application example: delta ₁ =10mm；r ₁ =500mm；r ₂ =2000mm； D ₁ =4000mm；L ₁ =1000mm。

δ ₃ =(D ₁ /L ₁ )(r ₂ /r ₁ )δ ₁ =(4000/1000)×(2000/500)×10=160mm。

The single set of amplification factors are 16 times; the amplification factor of the double-set symmetrical arrangement is 32 times.

Referring to FIGS. 14-15, under the action of earthquake, deformation difference delta is generated between the outer frame structure and the inner cylinder structure ₁ Due to the amplifying action of the primary amplifying part, the vertical deformation delta acting on the hinge point of the secondary amplifying part ₂ =f ₁ δ ₁ Wherein the primary amplification factor f ₁ =r ₂ r ₁ Vertical deformation delta ₂ Then the axial deformation delta of the viscous fluid damper is acted by the amplification action of the diamond-shaped scissor-stay secondary amplification device of the secondary amplification part ₃ =f ₂ δ ₂ Wherein the secondary amplification factor f ₂ =D ₂ /L ₁ So the final amplification factor is f=f ₁ f ₂ The larger the amplification factor f is, the more energy is consumed by the viscous fluid damper, and the smaller the earthquake action born by the main body structure is, the more obvious the energy consumption effect is.

Claims

1. The utility model provides a prevent out-of-plane unstability lever secondary amplification type cantilever truss energy dissipation damping structure, includes inner tube structure (4) and frame structure, still including setting up the cantilever truss of energy dissipation between the two, its characterized in that:

the outer frame structure comprises an outer frame column (1), a lower layer steel bracket (2) and an upper layer steel bracket (3), wherein the lower layer steel bracket (2) and the upper layer steel bracket (3) are respectively and vertically fixedly connected at the inner side of the outer frame column (1) and positioned in the same vertical plane with the energy dissipation cantilever truss,

the energy dissipation cantilever truss comprises a cantilever truss (5) and an energy dissipation device of the cantilever truss (5), the cantilever truss (5) is positioned in a vertical plane and is vertical to the inner cylinder structure (4), the inner end of the energy dissipation device is fixedly connected to the outer wall of the inner cylinder structure (4), the energy dissipation device is arranged between the cantilever truss (5) and the outer frame structure,

the energy dissipation device and the cantilever truss (5) are positioned in the same vertical plane and comprise a primary amplifying part (6), a secondary amplifying part (7) and a rigid support part (8),

the primary amplifying part (6) comprises a horizontal lever arm, wherein the inner end is hinged with the outer end of the cantilever truss (5), the outer end is hinged with the secondary amplifying part (7),

the secondary amplifying part (7) is positioned at the outer side of the primary amplifying part (6) and comprises an upper half component (7 a) and a lower half component (7 b), the upper half component (7 a) and the lower half component (7 b) are identical in structure and respectively comprise four equal-length amplifier rigid straight rod supports (71) which are enclosed into a diamond-shaped scissor support and a horizontal damper (72), the end connection of each two amplifier rigid straight rod supports (71) at four corners of the diamond-shaped scissor support is hinged, two horizontally aligned diamond-shaped end connection points are respectively an inner connection point and an outer connection point, the horizontal damper (72) is positioned in a diamond plane, two ends of the horizontal damper (72) are hinged with the inner connection point and the outer connection point, two vertically aligned diamond-shaped end connection points are respectively an upper connection point and a lower connection point, the upper connection point of the upper half component (7 a) is hinged with the bottom of an upper layer steel bracket (3), the lower connection point of the upper half component (7 a) is hinged with the upper connection point of the lower half component (7 b) which is the same hinge point, namely the middle point (73) of the secondary amplifying part, the two horizontally aligned diamond-shaped end connection points (7 b) are hinged with the top of the lower half component (2),

the rigid support seat (8) is positioned below the primary amplifying part (6) and above the lower steel bracket (2) and comprises a base (81) and two rigid support straight-bar supports (82) with equal length, the base (81) is fixedly connected to the top end of the lower steel bracket (2), the upper ends of the two rigid support straight-bar supports (82) are hinged with the primary amplifying part (6) through the same hinge point, the lower ends of the two rigid support straight-bar supports (82) are separated and are respectively hinged to the inner end and the outer end of the base (81), and the base (81) and the two rigid support straight-bar supports (82) form an isosceles triangle, so that the rigid support straight-bar supports (82) are used as the fixed hinge supports of the primary amplifying device.

2. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 1, wherein the structure is characterized in that: the outer end of the primary amplifying part (6) is hinged with the midpoint (73) of the secondary amplifying part.

3. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 2, wherein: the energy dissipation device further comprises an out-of-plane instability prevention portion (9), the out-of-plane instability prevention portion (9) and the horizontal lever arm are arranged on the same elevation, the energy dissipation device comprises an out-of-plane stability baffle (91) and a sliding layer (92), the out-of-plane stability baffle (91) is provided with two blocks, the outer end of the out-of-plane stability baffle (91) is fixedly connected to the inner side of an outer frame column (1), the inner end of the out-of-plane stability baffle (91) is clamped at the left side and the right side of a midpoint (73) of the secondary amplification portion, the sliding layer (92) is arranged on one side of the out-of-plane stability baffle (91) facing the midpoint (73) of the secondary amplification portion, and the sliding layer (92) contacts with one side of the other side of the out-of-plane stability baffle (91) facing the midpoint (73) of the secondary amplification portion.

4. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 1, wherein the structure is characterized in that: the horizontal damper (72) is a viscous fluid damper, a shear type metal damper, or a friction type damper.

5. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 2, wherein: all hinged connections are pin shaft (10) connections with holes.

6. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 5, wherein the structure is characterized in that: the outer end of the cantilever truss (5) is provided with a cantilever truss lug plate (51), and the inner end of the primary amplifying part (6) is hinged with the cantilever truss lug plate (51).

7. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 5, wherein the structure is characterized in that: the bottom of upper steel corbel (3) is equipped with upper steel corbel otic placode (31), and the upper junction of upper half subassembly (7 a) is articulated with upper steel corbel otic placode (31) and is connected, the top of lower floor steel corbel (2) is equipped with lower floor steel corbel otic placode (21), and the lower junction and the articulated connection of lower floor steel corbel otic placode (21) of lower half subassembly (7 b).

8. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 3, wherein: the sliding layer (92) is made of polytetrafluoroethylene material.

9. The out-of-plane instability prevention lever type secondary amplification cantilever truss energy dissipation damping structure according to claim 1, wherein the structure is characterized in that: the elevation of the hinged connection position of the lower connection point of the lower half component (7 b) and the top of the lower steel bracket (2) is equal to the elevation of the hinged connection position of the lower end of the support rigid straight rod support (82) and the base (81),

the elevation of the midpoint (73) of the secondary amplifying part is equal to the elevation of the hinged connection position of the upper end of the support rigid straight rod support (82) and the primary amplifying part (6).