CN112081262A - A Multiple Displacement Amplifying Connection Mechanism and Self-Balancing Composite Energy Dissipation System - Google Patents

Abstract

The invention relates to the technical field of energy dissipation and shock absorption of building structures, in particular to a multiple displacement amplification connecting mechanism and a self-balancing composite energy dissipation system. The self-balancing composite energy dissipation system ensures that the damper deforms and the damping effect is amplified multiple step by step through an efficient multiple amplification mechanism, thereby achieving the purposes of high amplification efficiency, adjustable amplification coefficient, quick response, self-balancing and large-deformation damping energy consumption.

Description

A Multiple Displacement Amplifying Connection Mechanism and Self-Balancing Composite Energy Dissipation System

technical field

The invention relates to the technical field of energy dissipation and shock absorption of building structures, in particular to a multiple displacement amplifying connection mechanism and a self-balancing composite energy dissipation system.

Background technique

Energy dissipation and shock absorption technology is one of the most important achievements in earthquake engineering in the world in the past 50 years. As energy dissipation and shock absorption products, dampers have been widely used in building structures and bridges, making important contributions to ensuring the safety of people's lives and properties. Under earthquake or wind load vibration, the building structure transmits the deformation to the damper. After the damper deforms to the yield displacement, it starts to consume energy, consumes the effect of earthquake or vibration, and protects the safety of the main structure. The greater the deformation (displacement) of the damper, the greater the working efficiency and the more obvious its energy dissipation effect. The layout of the damper has a great influence on its working efficiency. Usually, the displacement amplification factor (f = damper displacement / horizontal displacement between layers of the structure) is used to evaluate the working efficiency of the damper. The traditional damper layout mainly includes wall type. (as shown in Fig. 1), support type (as shown in Fig. 2), shear connection type (as shown in Fig. 3) and magnified type; the damper magnified arrangement is roughly divided into toggle type (as shown in Fig. 1) according to different magnification methods. Such as Figure 4) and outrigger type (Figure 5) and so on. Wall type, support type and shear connection type mainly use the interlayer deformation of the structure to exert the energy dissipation effect of the damper. in order to achieve a certain energy consumption effect. The toggle type is a mechanical amplification type mechanism, and its displacement amplification coefficient is f=sinθ ₁ /cos(θ ₁ +θ ₂ )+sinθ ₂ , where θ ₁ is the angle between the upper support rod and the vertical direction, and θ ₂ is the lower support rod. For the included angle with the horizontal, the displacement magnification effect only depends on the obtuse angle between the two toggle support rods. At this time, the interlayer deformation of the structure is too large, and the angle deformation margin that can be exerted by the toggle support decreases rapidly. After the three-point collinearity is close to 180°, the internal force of the support member will increase sharply to infinity, which will lead to failure. Therefore, the project will fail. The displacement amplification factor of the toggle damper reasonably designed in the application is 2.0-3.5, and the acute angle corresponding to the second link of the toggle is [13°, 23°]. The arrangement of the outrigger type damper improves the working efficiency of the damper arranged at the end of the outrigger through the lever amplification of the outrigger. The displacement amplification factor is related to the ratio of the length of the outrigger/height of the outrigger. The size of the outrigger depends on the span-to-height ratio between the structural layers, so the displacement amplification factor is generally 2.0 to 4.0. The above two types of damper amplification arrangements have the problem of limited displacement amplification effect, and the actual design range of the angle between the two links of the toggle type damper is small, and the installation accuracy is high, while the design and structure of the outrigger type damper are limited by The building use conditions have a great impact.

Building energy dissipation dampers are divided into velocity dampers, displacement dampers and compound dampers according to their types. The energy dissipation capacity of velocity-type dampers is related to the relative velocity at both ends of the damper, such as viscous dampers, viscoelastic dampers, etc.; the energy dissipation capacity of displacement-type dampers is related to the relative displacement at both ends of the damper, such as buckling restraint supports , friction dampers, etc.; the energy dissipation capacity of composite dampers is related to the relative displacement and relative velocity at both ends of the damper, such as lead viscoelastic dampers. Among all kinds of building energy dissipation dampers, velocity-type viscous dampers are mainly composed of cylinders, pistons, viscous materials, etc. device. Due to its low stiffness and sufficiently large deformation capacity, viscous dampers have excellent force and displacement hysteresis performance and fatigue performance, which can effectively reduce the response of the structure under various dynamic loads, and are often used in high-rise structures. Seismic and wind vibration control. One of the main design control parameters of the viscous damper is the velocity index α. The application range of the velocity index in engineering is mainly in the range of α=[0.15～1]. As shown in Figure 6, the damping force and velocity index of the viscous damper are , the mechanical properties of the damper within its range are linearly related to the speed of the viscous damper when the speed index α=1, that is, the increase of the force is the same as the increase of the speed; when α≠1, the viscous damper has a linear relationship with the speed. The relationship between damper output and speed is nonlinear; in particular, when the speed is not large, for a viscous damper with α<1, that is, the increase of force is less than that of speed, and the smaller α is, the consumption of the damper is less. The better the energy effect; when α>1, the increase of the force is greater than the increase of the speed, the energy consumption area is small, and the increase of the force is faster as the speed increases. Therefore, in the prior art, a viscous damper with a speed index α<1 with a strong early energy dissipation capability is generally used.

How to effectively improve the working efficiency of the damper under the condition of limited interlayer deformation of the building structure and give full play to the energy dissipation effect of the damper has attracted more and more attention of engineers. In addition, a damper with a single energy dissipation effect cannot meet the energy dissipation requirements of the structure in different working stages. How to construct an energy dissipation system with composite energy dissipation capacity has gradually become a research hotspot in the engineering and academic circles.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide a multiple displacement amplification connection mechanism, which forms a connection mechanism with high stability, fast response, and multiple amplification of deformation through the organic connection structure of the cantilever truss, the toggle link and the structure. rod mechanism, and forms a force self-balancing energy dissipation system with the damper connected inside the mechanism. By multiplying the axial displacement of the damper, the damping effect of the damper is amplified step by step, so as to achieve high amplification efficiency and response. The purpose of fast, self-balancing, large deformation damping energy dissipation. Another object of the present invention is to provide a self-balancing composite energy dissipation system, which adopts two dampers with different speed parameters to be arranged in parallel. The dampers with different parameters can complement each other to continuously increase the composite damping force. In addition, the cantilever truss chords or inclined webs are supported by displacement dampers, which can further realize the composite energy dissipation effect of the energy dissipation system.

Based on this, the present invention provides a multiple displacement amplification connection mechanism, including a first support rod, a second support rod, a cantilever truss, and a structure, the cantilever truss is fixedly connected to the structure, and the first support rod is One end is hinged with one end of the second support rod to form a second toggle link with a middle active hinge, and the first support rod and the second support rod of the second toggle link are arranged at an included angle, and the first support The other end of the rod is hinged on the end of the cantilever truss, and the other end of the second support rod is hinged on the structure.

As a preferred solution, the initial acute angle included between the first support rod and the second support rod is [15°, 45°].

As a preferred solution, the structure includes a shear wall, a support frame and a frame column, one end of the cantilever truss is fixedly connected to the shear wall or the support frame, and the second support rod in the two-link toggle link The other end is hinged on the frame column or shear wall or supporting frame.

A technical solution for a self-balancing composite energy dissipation system, comprising a damper and the multiple displacement amplifying connection mechanism of claim 1, wherein one end of the damper is hinged on the middle movable hinge of the second toggle link, and the The other end of the damper is hinged to the end of the cantilever truss, and does not coincide with the hinge point of the other end of the first support rod.

As a preferred solution, the first support rod is hinged to the second support rod, and one end of the damper is hinged to the first support rod or to the second support rod.

As a preferred solution, the damper is a first damper and a second damper arranged in parallel, and two ends of the first damper and two ends of the second damper are hingedly connected by end connections.

As a preferred solution, the first damper is a velocity type damper or a displacement type damper, and the second damper is a velocity type damper or a displacement type damper.

As a preferred solution, the first damper is a viscous damper with a speed index less than 1, and the second damper is a viscous damper with a speed index greater than 1.

As a preferred solution, the cantilever truss is composed of a cantilever truss chord and a cantilever truss web, the truss web includes a diagonal web and/or a vertical web, and the cantilever chord and diagonal web are ordinary steel. support.

As a preferred solution, the chord rod and the inclined web rod are displacement dampers, and the displacement dampers are buckling restraint supports or friction dampers.

Beneficial effect: The multiple displacement amplification connection mechanism of the present invention can convert the deformation of the structure into the rotational deformation of the end of the cantilever truss with the first effect of amplifying the stroke, and drive the toggle joint 2 of the second amplifying effect that is hinged to the end of the cantilever truss. The connecting rod forms a connecting rod mechanism with a double amplification effect. In the self-balancing composite energy dissipation system of the present invention, one end of the damper is hinged on the middle movable hinge of the second toggle link, and the other end of the damper is hinged on the cantilever truss, and is connected with the first support in the second toggle link. The hinge point at the other end of the rod is not heavy, so that the damper deformation has a triple stroke effect. When the other end of the second support rod in the toggle second link is hinged on the shear wall or the support frame, it is beneficial to the deformation of the damper to obtain a significant quadruple amplifying stroke effect, and the damper displacement amplification factor can reach more than 6.0. The damper displacement amplification factor can be adjusted and selected according to actual needs, and the controllability is very obvious. The number of dampers required for the building structure to withstand the same vibration is greatly reduced, thereby reducing the engineering cost. Another significant advantage of the present invention is that the damper is arranged inside the multiple displacement amplifying connection mechanism and is not directly connected to the structure, so that the cantilever truss, the damper and the toggle link are connected in pairs to form a stable surface. External self-balance state and dynamic self-balance state, the energy dissipation system greatly simplifies the structural measures for out-of-plane stability, and the force transmission is clear, economical, reasonable, safe and reliable.

In addition, if two dampers arranged in parallel use viscous dampers or displacement dampers at the same time, the damping superposition amplification effect of the same type of dampers can be achieved; for example, two dampers arranged in parallel use different types of damping respectively. It can realize the purpose of composite energy consumption of the energy consumption system and meet the energy consumption requirements of the structure in different working stages. Moreover, when one damper fails, it does not affect the use of the entire energy dissipation system. The cantilever truss in the form of truss has high rigidity, clear and direct force transmission of rods, and high material application efficiency, which can ensure that the damper can fully exert the effect of large deformation damping and energy dissipation. When the displacement type damper is used to replace all or part of the members of the cantilever truss, the high bearing capacity and energy dissipation characteristics of the displacement type damper can also be exerted. The stable and continuous growth of the damping energy dissipation capacity meets the energy dissipation requirements of the structure in different working stages.

Description of drawings

Fig. 1 is a schematic diagram of prior art damper wall arrangement and its deformation decomposition;

Figure 2 is a schematic diagram of the prior art damper support type arrangement and its deformation decomposition;

3 is a schematic diagram of the shear-type arrangement of the prior art damper and its deformation decomposition;

4 is a schematic diagram of the prior art damper toggle type arrangement and its deformation and decomposition;

Fig. 5 is a schematic diagram of a prior art damper outrigger arrangement and its deformation decomposition;

Fig. 6 is the graph of damping force and velocity index of viscous damper;

Fig. 7 is the deformation decomposition schematic diagram of the damper displacement amplification of the embodiment of the energy dissipation system of the present invention;

8 is a schematic diagram of an internal force transmission path of an embodiment of the energy dissipation system of the present invention;

Fig. 9 is the structural schematic diagram 1 of the energy dissipation system of the present invention;

Fig. 10 is the second structural schematic diagram of the energy dissipation system of the present invention;

11 is a schematic diagram of dampers arranged in parallel in the energy dissipation system of the present invention;

FIG. 12 is a third structural schematic diagram of the energy dissipation system of the present invention.

Among them, 1, the first support rod; 2, the second support rod; 11, the middle living hinge; 12, the second link of the toggle; 31, the cantilever truss chord; 32, the cantilever truss web; 321, the cantilever truss bevel Rod; 322, cantilever truss vertical web rod; 41, shear wall or support frame; 42, frame column or shear wall or support frame; 5, damper; 51, first damper; 52, second damper; 53. End connecting hinge; 6. Buckling restraint support.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

An embodiment of a self-balancing composite energy dissipation system, as shown in Figure 9, the present invention includes a damper 5 and a multiple displacement amplifying connection mechanism, a multiple displacement amplifying connection mechanism, a first support rod 1, a second support rod 2, a cantilever The truss, the structure, the cantilever truss is fixedly connected to the structure, one end of the first support rod 1 and one end of the second support rod 2 are hinged to form a second toggle link 12 with a central living hinge 11, and the second toggle link 12 The first support rod 1 and the second support rod 2 are arranged at an included angle, the other end of the first support rod 1 is hinged to the end of the cantilever truss, and the other end of the second support rod 2 is hinged to the structure. One end of the damper 5 is hinged on the middle movable hinge 11 of the second toggle link 12 , and the other end of the damper 5 is hinged on the cantilever truss, and does not coincide with the hinge point of the other end of the first support rod 1 . The structure includes a shear wall, a support frame and a frame column, one end of the cantilever truss is fixedly connected to the shear wall or the support frame 41, and the other end of the second support rod 2 in the two toggle links 12 is hinged to the frame. Columns or shear walls or support frames 42 .

One end of the damper 5 in the energy dissipation system is hinged on the middle movable hinge 11 of the second toggle link 12, and the second toggle link 12 connected between the end of the cantilever truss and the structure can drive it under a certain angle. The connected damper 5 produces opening and closing motion; since the cantilever truss is fixedly connected to the structure, the deformation of the structure can be transformed and transmitted to the end of the cantilever truss, while the other end of the first support rod 1 in the toggle two-link 12 is hinged to the end of the cantilever truss. At the end of the cantilever truss, the other end of the damper 5 is hinged to the end of the cantilever truss, and is not coincident with the hinge point of the other end of the first support rod 1 in the second toggle link 12, through the cantilever truss, the second toggle link 12 The organic connection structure of the structure forms a link mechanism with high stability, fast response, and multiple amplification of deformation, and forms a force self-balancing energy dissipation system with the damper 5 connected inside the mechanism. The multiple amplification further amplifies the damping effect of the damper 5 in multiple stages, so as to achieve the purposes of high amplification efficiency, fast response, self-balancing, and large deformation damping and energy consumption.

7 is a schematic diagram of the deformation and decomposition of the damper displacement amplification according to the embodiment of the present invention, the opening and closing motion of the second toggle link 12 under a certain angle state has the effect of amplifying the stroke (eg θ ₁ =34°, θ ₂ =37.7 °, the displacement amplification factor of the toggle second link 12 is set as f ₁₀ =sinθ ₁ /cos(θ ₁ +θ ₂ )+sinθ ₂ =2.5), and the plane space cantilever truss fixedly connected to the structure can be The deformation of the structure is transformed into the rotational deformation of the end of the cantilever truss, and the rotational deformation has the effect of amplifying the stroke (for example, L ₁ = 2H, the set displacement magnification factor is f2 = 2.0), and drives the toggle two hinged at the end of the cantilever truss. The connecting rod 12 produces a double amplifying stroke effect. After theoretical derivation and equivalent calculation, the displacement amplification factor f1 of the two-link toggle link 12 driven by the cantilever truss is approximately equal to the two series combination units (cantilever truss, two-link toggle link 12), that is, f1≈f10*f2=2.5*2.0=5.0, which significantly amplifies the deformation of the damper 5 hinged on the living hinge 11 in the middle of the second link 12 of the toggle. In addition, since the displacement of the other end of the damper 5 is directly amplified by the end of the cantilever truss to produce a triple amplifying stroke effect, the final displacement amplification factor f of the multiple displacement amplifying connection mechanism is approximately equal to the two parallel combination units at both ends of the damper 5 (cantilever truss, cantilever truss + The addition and superposition of the displacement amplification factor of the toggle second link 12), that is, f≈f1+f20=5.0+1.0=6.0, the deformation (displacement) of the damper 5 is significantly amplified, and the displacement amplification factor of the damper 5 can be Adjustment and selection are made according to actual needs, and the controllability is very obvious. The number of dampers required for the building structure to withstand the same vibration is greatly reduced, thereby reducing the engineering cost.

Among them, in the high-rise structure, the bending deformation of the shear wall and the supporting frame (41, 42) is positively correlated with the height of the structure, while the bending deformation of the frame column 42 is small, and the shear deformation is large, so the cantilever truss is fixedly connected to the stronger rigidity. When the shear wall and the support frame 41 are connected, it is beneficial to smoothly convert the structural deformation into the rotational deformation of the end of the cantilever truss, and the other end of the second support rod 2 in the toggle second link 12 can be hinged to the frame column or shear. On the force wall or the support frame 42, if the other end of the second support rod 2 is hinged on the shear wall or the support frame 42 with the same rotational effect, it is beneficial to multiply the displacement magnification factor of the connection mechanism and realize the connection mechanism. The four-fold magnifying stroke effect further improves the effectiveness, universality and magnification efficiency of the connecting mechanism.

Among them, the damper 5 of the self-balancing composite energy dissipation system of the present invention is arranged inside the multiple displacement amplifying connection mechanism and is not directly connected with the structure. One end of the damper 5 is hinged on the middle movable hinge 11 of the second link 12 of the toggle joint. , the other end of the damper 5 is hinged on the cantilever truss, and the hinge points connected with the first support rod 1 and the cantilever truss are not overlapped, so that the cantilever truss, the damper 5, and the two toggle links 12 are in two pairs The connection is restrained to form a stable out-of-plane self-balancing state, the out-of-plane stability of the energy dissipation system is greatly improved, and the feasibility of out-of-plane self-balancing of the connection mechanism and the energy dissipation system as a whole is realized, which greatly simplifies the out-of-plane self-balancing. Constructive measures for stability. In addition, the energy dissipation system of the present invention also has dynamic self-balancing characteristics, and the internal force transmission path of the energy dissipation system under the motion working state is shown in FIG. 8 . It can be seen from Figure 8 that the external force circulates and digests itself in the connecting mechanism and the damper 5, and the force transmission route is short, direct and clear, which achieves the purpose of dynamic self-balance under the moving working state, and makes the energy dissipation system internal tension and compression. Each member of the force can give full play to the bearing capacity of its own material, and the required member cross-section is small; at the same time, there are only three force transmission entrances and exits connecting the energy dissipation system and the structure, which is the least required for the force transmission balance state of the plane space component. The number of power transmission points and the concentration of power transmission points can make the structure design convenient and simple. To sum up, the innovative self-balancing structure of the present invention makes the energy dissipation system clear, economical and reasonable, safe and reliable.

Preferably, the initial acute angle included between the first support rod 1 and the second support rod 2 in the second toggle link 12 is [15°, 45°]. Since the displacement amplification factor f of the traditional toggle second link 12 is greater than 1.0, the corresponding initial acute angle is 40°, while the displacement amplification factor [3.5～2.0] commonly used in engineering applications, the initial acute angle corresponding to the toggle second link 12 is 40°. The angle is [13°, 23°], that is, the displacement magnification factor of 3.5 corresponds to the initial acute angle of 13°, the displacement magnification factor of 2.0 corresponds to the initial acute angle of 23°, and the smaller the initial acute angle, the greater the displacement magnification factor. . Due to the double amplifying stroke effect of the cantilever truss on the second toggle link 12, when the displacement amplification factor f of the second toggle link 12 is greater than 1.0, the corresponding initial acute angle increases from 40° to 65°, and when the displacement amplification factor is 2.0 The corresponding initial acute angle is increased from 23° to 45°. When the displacement amplification factor is 6.0, the corresponding initial acute angle is 15°. The critical state of collinearity appears in the movement process, and the initial acute angle included angle of the second toggle link 12 acted by the double enlarged stroke is not less than 15°, then the initial acute angle of the toggle second link 12 of the present invention is taken as [ 15°, 45°], the variation range of the initial acute angle of the toggle second link of the present invention is about 3 times that of the obtuse angle of the traditional toggle link, and the initial acute angle corresponding to the displacement amplification factor 1.0 The obvious increase indicates that the mechanism has fast deformation response and high amplification efficiency, which significantly improves the adaptability, layout diversity and installation feasibility of the energy dissipation system of the present invention to the use of building space.

One end of the damper 5 is hinged on the first support rod 1 or the second support rod 2, as shown in FIG. 10, which can realize flexible installation and fast and stable force transmission of the damper.

Wherein, the damper 5 is a first damper 51 and a second damper 52 arranged in parallel, and the two ends of the first damper 51 and the two ends of the second damper 52 are connected by end connecting hinges 53, as shown in Fig. 10- Figure 11. The damper 5 is a first damper 51 and a second damper 52 arranged in parallel, and a space of 50-150 mm is reserved to avoid interference, and the two ends of the first damper 51 and the two ends of the second damper 52 pass through The end connecting hinges 53 are connected. The energy dissipation effect of damping amplification can be achieved by using two dampers arranged in parallel, and when one damper fails, the use of the entire energy dissipation system is not affected.

Wherein, the first damper 51 is a velocity type damper or a displacement type damper, and the second damper 52 is a velocity type damper or a displacement type damper. If two dampers arranged in parallel use viscous dampers or displacement dampers at the same time, the damping superposition and amplification effect of the same type of dampers can be achieved; for example, two dampers arranged in parallel use different types of dampers respectively, Then the purpose of composite energy consumption of the energy dissipation system can be realized.

The first damper 51 is a viscous damper with a speed index less than 1, and the second damper 52 is a viscous damper with a speed index greater than or equal to 1. Setting two viscous dampers with different parameters in parallel can amplify the energy dissipation capacity of the damper and make the energy dissipation capacity of the damper continue, avoiding the viscous damper whose velocity index is less than 1. Energy dissipation effect; when the early deformation (speed) of the energy dissipation system is not large, the first damper 51 with a speed index α<1 consumes significant energy and is the main energy-consuming component, and the second damper 52 with a speed index α>1 The output is very small and the energy consumption effect is small, which does not affect the performance of the viscous damper effect of α<1; when the deformation of the energy dissipation system increases in the later stage, the energy consumption increase effect of the first damper 51 with the velocity index α<1 is limited, but A certain amount of energy consumption can still be maintained, and the damping force and energy dissipation effect of the second damper 52 with a velocity index α>1 gradually exerts, and the damping force increases rapidly, so that during the entire vibration (vibration) process of the building structure, The damping force can continue to the whole shock absorption (vibration) process without weakening. At this time, the two dampers are jointly subjected to force and combined energy dissipation, so as to achieve the stable and continuous growth of the damping energy dissipation capacity, and meet the requirements of the structure in different working stages. energy demand.

The cantilever truss is composed of a cantilever truss chord 31 and a cantilever truss web 32 connected, the truss web 32 includes a diagonal web 321 and/or a vertical web 322, and the cantilever chord 31 and the diagonal web 321 are common steel supports , as shown in Figure 10. In the embodiment of the present invention, the chord 31 and the web 32 of common steel support material are connected by welding or hinged connection. It ensures that the cantilever truss has the advantages of high rigidity, flexible structure and installation, light weight and clear force transmission, so that the interlayer deformation of the structure is completely transmitted to the toggle second link 12 through the rotation of the cantilever truss to ensure that the damper 5 Give full play to the large deformation damping energy dissipation effect

Among them, the chord 31 and the oblique web 321 are displacement-type dampers, and the displacement-type dampers are buckling restraint supports 6 or friction dampers, as shown in FIG. 12 . Since the buckling bearing capacity of steel braces is much smaller than the yield bearing capacity, buckling instability is likely to occur before the material is fully exerted, and the stable and continuous bearing capacity and stiffness capacity are lost. In order to ensure that the buckling instability of ordinary steel bracing does not occur, the conventional method is to use the method of increasing the section to further increase its buckling bearing capacity, resulting in an increase in the amount of material and a corresponding increase in the related structural difficulty. Another way to improve the stable bearing capacity is to use displacement dampers, such as buckling restraint braces 6 or friction dampers, which not only have large initial stiffness and high bearing capacity, but also have controllable stiffness, good energy dissipation and hysteretic performance. stability and other advantages. By replacing all or part of the chords or inclined web members of the cantilever truss with buckling restraint braces 6 or friction dampers, a cantilever truss with sufficient rigidity is constructed to satisfy the sufficient opening and closing motion of the toggle two-link 12 In the case of the deformation of the damper 5, the characteristics of the displacement type damper with high rigidity and high bearing capacity and energy consumption should be properly exerted, and the damper 5 connected with the toggle second link 12 will jointly bear force and combine energy consumption, so as to realize the damping energy consumption capacity. The stable and continuous growth of the structure can meet the energy consumption needs of the structure in different working stages.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a coupling mechanism is enlargied in multiple displacement, its characterized in that includes first bracing piece, second bracing piece, cantilever truss fixed connection be in on the structure, the one end of first bracing piece articulates with the one end of second bracing piece and forms a toggle two connecting rods that have middle part activity hinge, just the first bracing piece and the second bracing piece of toggle two connecting rods are the contained angle and arrange, the other end of first bracing piece articulates cantilever truss is terminal, the other end of second bracing piece in articulate on the structure.

2. The multiple displacement amplifying linkage of claim 1, wherein the structure comprises a shear wall, a support frame and a frame column, one end of the cantilever truss is fixedly connected to the shear wall or the support frame, and the other end of the second support rod of the toggle two-link is hinged to the frame column or the shear wall or the support frame.

3. The multiple displacement amplifying coupling mechanism according to claim 1, wherein the first support bar 1 and the second support bar are initially at an acute included angle of [15 °, 45 ° ].

4. A self-balancing composite energy-dissipating system comprising a damper 5 and the multiple displacement amplifying connecting mechanism of any one of claims 1 to 3, wherein one end of the damper is hinged to the middle movable hinge of the toggle two-link, and the other end of the damper is hinged to the end of the cantilever truss and does not overlap with the hinge point of the other end of the first support rod.

5. The self-balancing composite energy dissipating system of claim 4, wherein one end of the damper is hinged to the first support rod or the second support rod.

6. The self-balancing composite energy dissipation system of claim 4, wherein the dampers comprise a first damper and a second damper which are arranged in parallel, and two ends of the first damper are respectively hinged with two ends of the second damper through end connection hinges.

7. The system of claim 6, wherein the first damper is a velocity type damper or a displacement type damper and the second damper is a velocity type damper or a displacement type damper.

8. The self-balancing composite energy dissipating system of claim 7, wherein the first damper is a viscous damper having a velocity index less than 1 and the second damper is a viscous damper having a velocity index greater than or equal to 1.

9. The multiple displacement amplifying linkage of claim 1, wherein the cantilever truss is formed by connecting cantilever truss chords and web members, the truss web members including diagonal web members and/or vertical web members, the cantilever truss chords and diagonal web members being common steel struts.

10. The multiple displacement amplifying connecting mechanism according to claim 1, wherein the chord member and the diagonal web member are displacement dampers, and the displacement dampers are buckling restrained braces or friction dampers.

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