A multiple displacement amplification connection mechanism and self-balancing composite energy dissipation system

Abstract

The present invention relates to the technical field of energy dissipation and shock absorption of building structures, and specifically to a multiple displacement amplification connection mechanism and a self-balancing composite energy dissipation system, comprising a first support rod, a second support rod, and a cantilever truss, wherein the cantilever truss is fixedly connected to the structure, one end of the first support rod is hinged to one end of the second support rod to form a toggle two-link with a central movable hinge, and the first support rod and the second support rod of the toggle two-link are arranged at an angle, the other end of the first support rod is hinged to the end of the cantilever truss, and the other end of the second support rod is hinged to the structure. The self-balancing composite energy dissipation system of the present invention ensures that the deformation of the damper and the damping effect are amplified multiple times in stages through an efficient multiple amplification mechanism, thereby achieving the purposes of high amplification efficiency, adjustable amplification coefficient, fast response, self-balancing, and large deformation damping energy dissipation.

Description

Technical Field

[0001] The present invention relates to the technical field of energy dissipation and shock absorption of building structures, in particular to a multiple displacement amplification connection mechanism and a self-balancing composite energy dissipation system. Background Art

[0002] Energy dissipation and shock absorption technology is one of the most important achievements of earthquake engineering in the world in the past 50 years. Dampers have been widely used in building structures and bridges as energy dissipation and shock absorption products, and have made important contributions to ensuring the safety of people’s lives and property. Under earthquake or wind load vibration, the building structure will transfer deformation to the damper. After the deformation of the damper reaches the yield displacement, it begins to consume energy, consume the earthquake or vibration effect, and protect 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. The displacement amplification coefficient (f = damper displacement / horizontal displacement between structural layers) is usually used to evaluate the working efficiency of the damper. The traditional damper layout mainly includes wall type (such as attached Figure 1 ), support type (such as attached Figure 2 ), shear connection type (such as attached Figure 3 ) and amplified type; the damper amplified arrangement is roughly divided into toggle type (such as attached Figure 4 ) and outrigger type (such as attached Figure 5), etc. Wall-type, support-type, and shear-connection-type dampers primarily utilize interlayer deformation to dissipate energy. Their displacement amplification factors are all less than 1.0, resulting in low efficiency. A large number of dampers must be deployed in the building structure to achieve a certain energy dissipation effect. The toggle type is a mechanical amplification mechanism, and its displacement amplification coefficient is f = sinθ1 / cos(θ1+θ2)+sinθ2, where θ1 is the angle between the upper support rod and the vertical direction, and θ2 is the angle between the lower support rod and the horizontal direction. The displacement amplification effect depends only on the obtuse angle between the two toggle support rods. If the initial angle is too small, the displacement amplification coefficient is less than 1.0. If the initial angle is too large, the displacement amplification coefficient is greater than 4.0. However, if the interlayer deformation of the structure is too large at this time, the angular deformation range that the toggle support can play will rapidly decrease. When the three points are close to 180° collinear, the internal force of the support rod will increase sharply to infinity, causing damage and failure. Therefore, the displacement amplification coefficient of a reasonably designed toggle damper in engineering applications is 2.0~3.5, and the acute angle corresponding to the toggle two-link is [13°, 23°]. The cantilever damper arrangement utilizes the lever-amplifying effect of the cantilever to improve the efficiency of the damper located at the end of the cantilever. The displacement amplification factor is related to the ratio of cantilever length to cantilever height. The size of the cantilever, located between building structural layers, depends on the span-to-height ratio between the structural layers. Therefore, the displacement amplification factor is generally between 2.0 and 4.0. Both damper amplification arrangements suffer from limited displacement amplification. Furthermore, the actual design range of the two-link angle of the toggle damper is small, requiring high installation precision. The design and construction of the cantilever damper are significantly affected by the building's operating conditions.

[0003] Building energy dissipation dampers are categorized by type into velocity dampers, displacement dampers, and composite dampers. The energy dissipation capacity of velocity dampers, such as viscous and viscoelastic dampers, is related to the relative velocity between the two ends of the damper. Displacement dampers, such as buckling-restrained braces and friction dampers, are related to the relative displacement between the two ends of the damper. Composite dampers, such as lead viscoelastic dampers, are related to both the relative displacement and the relative velocity between the two ends of the damper. Among the various types of building energy dissipation dampers, velocity viscous dampers are a type of shock-absorbing device primarily composed of a cylinder, a piston, and a viscous material. They utilize viscous damping generated by the movement of a liquid viscous material to dissipate energy. Due to their low inherent stiffness and sufficient deformation capacity, viscous dampers exhibit excellent force-displacement hysteresis and fatigue properties, effectively reducing the structural response to various dynamic loads and are commonly used to control seismic and wind-induced vibrations in high-rise structures. 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]. Figure 6The graph shows the damping force and velocity index of a viscous damper. Within this range, the mechanical performance of the damper is linear when the velocity index α = 1, meaning the force increases at the same rate as the velocity. When α ≠ 1, the relationship between the viscous damper output and velocity becomes nonlinear. Specifically, at low speeds, for a viscous damper with α < 1, the force increases less than the velocity. The smaller α, the better the damper's energy dissipation. When α > 1, the force increases more than the velocity, resulting in a smaller energy dissipation area and a faster force increase with increasing speed. Therefore, conventional viscous dampers with a velocity index of α < 1, which exhibit strong early energy dissipation capabilities, are generally used.

[0004] How to effectively improve the efficiency of dampers while limiting inter-story deformation in building structures and maximize their energy dissipation capabilities is gaining increasing attention from engineers. Furthermore, dampers with a single energy dissipation effect cannot meet the energy dissipation requirements of a structure at different operating stages. Therefore, constructing energy dissipation systems with comprehensive energy dissipation capabilities has become a research hotspot in both engineering and academia. Summary of the Invention

[0005] 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 linkage mechanism with high stability, fast response, and multiple deformation amplification through the organic connection structure of a cantilever truss, a toggle two-link, and a structure, and forms a force-self-balancing energy dissipation system with a damper connected inside the mechanism. By multiple amplifying the axial displacement of the damper, the damping effect of the damper is multiple and step-by-step amplified, thereby achieving the goals of high amplification efficiency, fast response, self-balancing, and large deformation damping energy dissipation. Another purpose of the present invention is to provide a self-balancing composite energy dissipation system, which uses two dampers with different speed parameters to be arranged in parallel. When one damper fails, it does not affect the use of the entire damper, and the two dampers with different parameters can complement each other to achieve a continuous increase in the composite damping force. In addition, the cantilever truss chord or diagonal web uses a support rod composed of a displacement-type damper to further achieve the composite energy dissipation effect of the energy dissipation system.

[0006] 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 one end of the first support rod is hinged to one end of the second support rod to form a toggle second link with a central movable hinge, and the first support rod and the second support rod of the toggle second link are arranged at an angle, the other end of the first support rod is hinged to the end of the cantilever truss, and the other end of the second support rod is hinged to the structure.

[0007] As a preferred solution, the initial acute angle between the first support rod and the second support rod is [15°, 45°].

[0008] As a preferred embodiment, 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 other end of the second support rod in the toggle two-link is hinged to the frame column or the shear wall or the support frame.

[0009] A technical solution for a self-balancing composite energy dissipation system, comprising a damper and the multiple displacement amplification connection mechanism as described in claim 1, wherein one end of the damper is hinged to the middle movable hinge of the toggle second link, and 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.

[0010] 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 hinged to the second support rod.

[0011] As a preferred solution, the damper is a first damper and a second damper arranged in parallel, and both ends of the first damper are connected to both ends of the second damper through end connection hinges.

[0012] As a preferred solution, the first damper is a velocity damper or a displacement damper, and the second damper is a velocity damper or a displacement damper.

[0013] As a preferred solution, the first damper is a viscous damper with a velocity index less than 1, and the second damper is a viscous damper with a velocity index greater than 1.

[0014] 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 truss chord and the diagonal web are ordinary steel supports.

[0015] As a preferred solution, the chords and diagonal webs are displacement dampers, and the displacement dampers are buckling restrained supports or friction dampers.

[0016] Beneficial effects: The multi-displacement amplification connection mechanism of the present invention can convert the deformation of the structure into a rotational deformation of the cantilever truss end with a first-level amplification effect, and drive the elbow joint second link hinged to the cantilever truss end with a second-level amplification effect, forming a link mechanism with a double amplification effect. One end of the damper of the self-balancing composite energy dissipation system of the present invention is hinged to the middle movable hinge of the elbow joint second link, and the other end of the damper is hinged to the cantilever truss, and the hinge point with the other end of the first support rod in the elbow joint second link does not coincide, so that the deformation of the damper has a triple amplification effect. When the other end of the second support rod in the elbow joint second link is hinged to the shear wall or support frame, it is beneficial for the damper deformation to obtain a significant quadruple amplification effect, and the damper displacement amplification coefficient can reach 6.0 or more. The damper displacement amplification coefficient can be adjusted and selected according to actual needs, and the controllability is very obvious. The number of dampers required for building structures subjected to the same vibration effect is greatly reduced, thereby reducing the project cost. Another significant advantage of the present invention is that the damper is arranged inside the multiple displacement amplification connection mechanism and is not directly connected to the structure, so that the cantilever truss, the damper, and the toggle two-link are restrained and connected in pairs, forming a stable out-of-plane self-balancing state and a dynamic self-balancing state. The energy dissipation system greatly simplifies the out-of-plane stability construction measures, and the force transmission is clear, economical, reasonable, safe and reliable.

[0017] Furthermore, if two parallel dampers are both viscous or displacement dampers, the damping effect of similar dampers can be achieved through a combined, amplified effect. If two parallel dampers are each equipped with different dampers, the energy dissipation system can achieve a composite energy dissipation strategy, meeting the energy consumption requirements of the structure at different operating stages. Furthermore, if one damper fails, the entire energy dissipation system remains operational. The truss-type cantilever truss offers high stiffness, clear and direct force transmission through the members, and high material efficiency, ensuring the dampers fully utilize their large-deformation damping and energy dissipation effects. When displacement dampers are used to fully or partially replace the members of the cantilever truss, their high load-bearing capacity and energy dissipation characteristics can be fully utilized. The dampers connected to the toggle link share the load and dissipate energy in a composite manner, achieving a stable and continuous increase in damping capacity and meeting the energy consumption requirements of the structure at different operating stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the wall arrangement of the damper and its deformation decomposition in the prior art;

[0019] Figure 2 It is a schematic diagram of the prior art damper support type arrangement and its deformation decomposition;

[0020] Figure 3 It is a schematic diagram of the shear type arrangement of the damper and its deformation decomposition in the prior art;

[0021] Figure 4 It is a schematic diagram of the toggle-type arrangement of the damper in the prior art and its deformation decomposition;

[0022] Figure 5 This is a schematic diagram of the conventional damper cantilever arrangement and its deformation decomposition;

[0023] Figure 6 is a graph of the damping force and velocity index of the viscous damper;

[0024] Figure 7 1 is a schematic diagram of deformation decomposition of the damper displacement amplification of the energy dissipation system embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the internal force transmission path of an embodiment of the energy dissipation system of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the energy dissipation system of the present invention. Figure 1 ;

[0027] Figure 10 This is a schematic diagram of the structure of the energy dissipation system of the present invention. Figure 2 ;

[0028] Figure 11 Schematic diagram of the parallel arrangement of dampers in the energy dissipation system of the present invention;

[0029] Figure 12 This is a schematic diagram of the structure of the energy dissipation system of the present invention. Figure 3 .

[0030] Among them, 1. First support rod; 2. Second support rod; 11. Middle movable hinge; 12. Second elbow link; 31. Cantilever truss chord; 32. Cantilever truss web; 321. Cantilever truss diagonal web; 322. Cantilever truss vertical web; 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 connection hinge; 6. Buckling restraint support. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] An embodiment of a self-balancing composite energy dissipation system, such as Figure 9As shown, the present invention includes a damper 5 and a multiple displacement amplification connection mechanism, the multiple displacement amplification connection mechanism, a first support rod 1, a second support rod 2, a cantilever truss, and a structure. The cantilever truss is fixedly connected to the structure. One end of the first support rod 1 is hinged to one end of the second support rod 2 to form a toggle second link 12 having a central movable hinge 11. The first support rod 1 and the second support rod 2 of the toggle second link 12 are arranged at an 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 to the central movable hinge 11 of the toggle second link 12, and the other end of the damper 5 is hinged to the cantilever truss, and the hinge point with the other end of the first support rod 1 does not coincide. 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 support frame 41, and the other end of the second support rod 2 in the toggle second link 12 is hinged to the frame column or shear wall or support frame 42.

[0033] One end of the damper 5 in the energy dissipation system is hinged to the middle movable hinge 11 of the toggle second link 12. The toggle second link 12 connected between the end of the cantilever truss and the structure can drive the damper 5 connected thereto to produce opening and closing movements at a certain angle. Since the cantilever truss is fixedly connected to the structure, the deformation of the structure can be converted and transmitted to the end of the cantilever truss. The other end of the first support rod 1 in the toggle second link 12 is hinged to the end of the cantilever truss, and the other end of the damper 5 is hinged to the end of the cantilever truss. And it does not coincide with the hinge point of the other end of the first support rod 1 in the toggle second link 12. Through the organic connection structure of the cantilever truss, the toggle second link 12, and the structure, a connecting rod mechanism with high stability, fast response, and multiple deformation amplification is formed, and a force-self-balancing energy dissipation system is formed with the damper 5 connected inside the mechanism. By multiple amplifying the axial displacement of the damper 5, the damping effect of the damper 5 is multiple-step amplified, thereby achieving the purposes of high amplification efficiency, fast response, self-balancing, and large deformation damping energy dissipation.

[0034] in, Figure 7 The schematic diagram of the deformation decomposition of the displacement amplification of the damper according to the embodiment of the present invention is shown. The opening and closing movement of the toggle second link 12 at a certain angle has an amplified stroke effect (e.g., θ1 = 34°, θ2 = 37.7°, then the displacement amplification coefficient of the toggle second link 12 is set to f 10=sinθ1 / cos(θ1+θ2)+sinθ2=2.5), and the plane space cantilever truss fixedly connected to the structure can convert the deformation of the structure into rotational deformation of the end of the cantilever truss. The rotational deformation has a one-fold stroke amplification effect (such as L1=2H, then the displacement amplification coefficient is set to f2=2.0), and drives the toggle second link 12 hinged at the end of the cantilever truss to produce a double stroke amplification effect. After theoretical derivation and equivalent calculation, the displacement amplification coefficient f1 of the toggle second link 12 driven by the cantilever truss is approximately equal to the product of the displacement amplification coefficients of the two series combination units (cantilever truss, toggle second 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 movable hinge 11 in the middle of the toggle second link 12. Furthermore, because the displacement at the other end of damper 5 is directly amplified by the end of the cantilever truss, producing a triple amplification effect, the displacement amplification coefficient f of the multiple displacement amplification connection mechanism is approximately equal to the sum of the displacement amplification coefficients of the two parallel combination units (cantilever truss, cantilever truss + toggle second link 12) at both ends of damper 5, i.e., f ≈ f1 + f20 = 5.0 + 1.0 = 6.0. This significantly amplifies the deformation (displacement) of damper 5, and the displacement amplification coefficient of damper 5 can be adjusted and selected according to actual needs, resulting in significant controllability. This significantly reduces the number of dampers required for a building structure subjected to the same vibration, thereby reducing construction costs.

[0035] Among them, in high-rise structures, the bending deformation of the shear wall and the supporting frame (41, 42) is positively correlated with the structural height, while the frame column 42 has a small bending deformation and a large shear deformation. Therefore, when the cantilever truss is fixedly connected to the shear wall and the supporting frame 41 with stronger rigidity, it is beneficial to smoothly convert the structural deformation into the rotational deformation of the end of the cantilever truss. The other end of the second support rod 2 in the toggle second link 12 can be hinged on the frame column or shear wall or supporting frame 42. If the other end of the second support rod 2 is hinged on the shear wall or supporting frame 42 with the same rotational effect, it is beneficial to multiply the displacement amplification coefficient of the connection mechanism, realize the four-fold amplification stroke effect of the connection mechanism, and further improve the effectiveness, universality and amplification efficiency of the connection mechanism.

[0036] Among them, the damper 5 of the self-balancing composite energy dissipation system of the present invention is arranged inside the multiple displacement amplification connection mechanism and is not directly connected to the structure. One end of the damper 5 is hinged on the middle movable hinge 11 of the elbow joint second link 12, and the other end of the damper 5 is hinged on the cantilever truss, and the hinge point connecting the first support rod 1 and the cantilever truss does not overlap, so that the cantilever truss, the damper 5, and the elbow joint second link 12 are restrained and connected in pairs 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 the out-of-plane self-balancing of the connection mechanism and the energy dissipation system as a whole is realized, thereby greatly simplifying the structural measures for maintaining its out-of-plane stability. In addition, the energy dissipation system of the present invention also has a dynamic self-balancing characteristic. The internal force transmission path of the energy dissipation system in the moving working state is as follows: Figure 8 As shown. Figure 8 It can be seen that the external force circulates and is digested by itself inside the connecting mechanism and the damper 5, and the force transmission route is short, direct, and clear, achieving the purpose of achieving dynamic self-balancing in the moving working state, so that each rod subjected to tension and compression in the energy dissipation system can fully exert the bearing capacity of its own material, and the required rod cross-section is small; at the same time, there are only three force transmission inlets and outlets connecting the energy dissipation system and the structure, which is the minimum number of force transmission points required for the plane space component to be in a force balance state. The concentration of force transmission points can make the structural design convenient and simple. In summary, the innovative self-balancing structure of the present invention makes the energy dissipation system force transmission clear, economical, reasonable, safe and reliable.

[0037] Preferably, the initial acute angle between the first support rod 1 and the second support rod 2 in the toggle second link 12 is [15°, 45°]. Since the initial acute angle corresponding to the displacement magnification coefficient f of the conventional toggle second link 12 is greater than 1.0 is 40°, and the displacement magnification coefficient is commonly used in engineering applications [3.5-2.0], the initial acute angle corresponding to the toggle second link 12 is [13°, 23°]. That is, the displacement magnification coefficient of 3.5 corresponds to the initial acute angle of 13°, and the displacement magnification coefficient of 2.0 corresponds to the initial acute angle of 23°. In addition, the smaller the initial acute angle, the larger the displacement magnification coefficient. Due to the double amplification effect of the cantilever truss on the toggle second link 12, when the displacement amplification coefficient f of the toggle second link 12 is greater than 1.0, the corresponding initial acute angle increases from 40° to 65°, when the displacement amplification coefficient is 2.0, the corresponding initial acute angle increases from 23° to 45°, and when the displacement amplification coefficient is 6.0, the corresponding initial acute angle is 15°. At the same time, in order to avoid the critical state of the first support rod 1 and the second support rod 2 of the toggle second link 12 appearing in the collinearity during the movement process, the toggle second link 12 affected by the double amplification effect is The minimum initial acute angle of the connecting rod 12 is not less than 15°, so the initial acute angle of the toggle two-link 12 of the present invention is taken as [15°, 45°]. The change range of the initial acute angle of the toggle two-link of the present invention is approximately 3 times the change range of the obtuse angle of the traditional toggle two-link, and the initial acute angle corresponding to the displacement amplification factor of 1.0 is significantly increased, indicating that the deformation response of the mechanism is fast and the amplification efficiency is high, which significantly improves the adaptability of the energy dissipation system of the present invention to the use of building space, the diversity of layout and the feasibility of installation.

[0038] One end of the damper 5 is hinged to the first support rod 1 or the second support rod 2. Figure 10 As shown, flexible installation of the damper and fast and stable force transmission can be achieved.

[0039] The damper 5 is a first damper 51 and a second damper 52 arranged in parallel. The two ends of the first damper 51 and the two ends of the second damper 52 are connected by an end connection hinge 53. Figures 10 and 11 As shown in FIG. The damper 5 comprises a first damper 51 and a second damper 52 arranged in parallel, with a spacing of 50 to 150 mm reserved to prevent interference. The ends of the first damper 51 and the ends of the second damper 52 are connected by end connection hinges 53. The use of two dampers arranged in parallel can achieve a damping-amplified energy dissipation effect, and even if one damper fails, the operation of the entire energy dissipation system is not affected.

[0040] The first damper 51 is a velocity damper or a displacement damper, and the second damper 52 is a velocity damper or a displacement damper. If the two dampers are both viscous dampers or displacement dampers, they can achieve the damping superposition and amplification effect of the same type of dampers. If the two dampers are both different types of dampers, they can achieve the purpose of composite energy dissipation in the energy dissipation system.

[0041] Among them, 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. The parallel arrangement of two viscous dampers with different parameters can amplify the energy dissipation capacity of the damper while maintaining the energy dissipation capacity of the damper, thereby avoiding the slow increase in damping force of the viscous damper with a speed index less than 1 in the later stage and reducing its energy dissipation effect; among them, 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 dissipation component, while the second damper 52 with a speed index α>1 has a very small output and a small energy dissipation effect, which does not affect the effect of the viscous damper with α<1; when the energy dissipation system is in the later stage, the first damper 51 with a speed index α<1 consumes significant energy and is the main energy dissipation component, and the second damper 52 with a speed index α>1 has a very small output and a small energy dissipation effect, which does not affect the effect of the viscous damper with α<1; when the energy dissipation system is in the later stage, the first damper 51 with a speed index α<1 consumes significant energy and is the main energy dissipation component, When the deformation increases, the energy consumption growth effect of the first damper 51 with a velocity index α<1 is limited, but a certain amount of energy consumption can still be maintained. The damping force and energy consumption effect of the second damper 52 with a velocity index α>1 gradually come into play, and the damping force increases rapidly. In this way, during the entire vibration process of the building structure, the damping force can continue throughout the entire shock absorption process and will not weaken. At this time, the two dampers are subjected to force together and consume energy in a combined manner, thereby achieving stable and continuous growth in the damping energy consumption capacity and meeting the energy consumption requirements of the structure in different working stages.

[0042] The cantilever truss is composed of a cantilever truss chord 31 and a cantilever truss web 32. The truss web 32 includes an oblique web 321 and / or a vertical web 322. The cantilever truss chord 31 and the oblique web 321 are ordinary steel supports, such as Figure 10 As shown. The embodiment of the present invention uses a chord member 31 and a web member 32 of ordinary steel support material connected by welding or hinged connection. The web member can also use a diagonal web member 321 and / or a vertical web member 322 to adjust the stiffness and force performance of the cantilever truss according to actual conditions, ensuring that the cantilever truss has the advantages of high stiffness, flexible structure and installation, light weight, and clear force transmission, so that the inter-story deformation of the structure is completely transmitted to the toggle second link 12 through the rotation of the cantilever truss, ensuring that the damper 5 fully exerts the large deformation damping energy dissipation effect.

[0043] The chord 31 and the diagonal web 321 are displacement dampers, and the displacement dampers are buckling restraint supports 6 or friction dampers, such as Figure 12As shown. Since the buckling bearing capacity of steel supports is much smaller than the yield bearing capacity, buckling instability is likely to occur before the material is fully utilized, resulting in the loss of stable and continuous bearing capacity and stiffness capacity. In order to ensure that ordinary steel supports do not suffer from buckling instability, the conventional method is to further improve their buckling bearing capacity by increasing the cross-section, which leads to an increase in material consumption and a corresponding increase in the difficulty of related construction. Another method to improve the stable bearing capacity is to use a displacement damper, such as a buckling restrained support 6 or a friction damper, which not only has a large initial stiffness and high bearing capacity, but also has the advantages of controllable stiffness, good energy dissipation effect and stable hysteresis performance. By replacing all or part of the chords or diagonal webs in the cantilever truss with buckling restrained supports 6 or friction dampers, a cantilever truss with sufficient rigidity is constructed. While fully utilizing the deformation of the damper 5 during the opening and closing movement of the toggle second link 12, the high stiffness, high load-bearing capacity and energy-dissipating characteristics of the displacement damper are appropriately utilized. The damper 5 connected to the toggle second link 12 is subjected to force and dissipates energy in a combined manner, thereby achieving stable and continuous growth in the damping energy dissipation capacity and meeting the energy dissipation requirements of the structure in different working stages.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A self-balancing composite energy dissipation system, characterized in that: including a damper and a multiple displacement amplification connection mechanism; The multiple displacement amplification connection mechanism includes a first support rod, a second support rod, and a cantilever truss, wherein the cantilever truss is fixedly connected to the structure, one end of the first support rod is hinged to one end of the second support rod to form a toggle second link with a central movable hinge, and the first support rod and the second support rod of the toggle second link are arranged at an angle, the other end of the first support rod is hinged to the end of the cantilever truss, and the other end of the second support rod is hinged to the structure; The cantilever truss is composed of a cantilever truss chord and a cantilever truss web, the cantilever truss chord includes a first cantilever truss chord and a second cantilever truss chord arranged at an interval up and down, the truss web includes a diagonal web and / or a vertical web, one end of the diagonal web and / or the vertical web is connected to the first cantilever truss chord, and the other end of the diagonal web and / or the vertical web is connected to the second cantilever truss chord; the other end of the first support rod is hinged to the end of the first cantilever truss chord; One end of the damper is hinged to the middle movable hinge of the toggle second link, and the other end of the damper is hinged to the end of the cantilever truss, and the hinge point with the other end of the first support rod does not coincide; The other end of the first support rod is hinged to the end of the first cantilever truss chord, and the other end of the damper is hinged to the end of the second cantilever truss chord; After the external force of the structure is transmitted to the first cantilever truss chord, the external force is divided into a first external force and a second external force. The first external force is transmitted to the second cantilever truss chord via the diagonal web member and / or the vertical web member, and is transmitted back to the structure via the second cantilever truss chord; the second external force is transmitted to the first support rod, and the second external force is further divided into a third external force and a fourth external force. The third external force is transmitted back to the structure via the damper and the second cantilever truss chord, and the fourth external force is transmitted back to the structure via the second support rod; the external force is made to flow automatically inside the self-balancing composite energy dissipation system to achieve dynamic self-balancing of the self-balancing composite energy dissipation system in a moving working state.

2. The self-balancing composite energy dissipation system according to claim 1, characterized in that: The structure includes a shear wall, a supporting frame and a frame column. One end of the cantilever truss is fixedly connected to the shear wall or the supporting frame, and the other end of the second supporting rod in the toggle two-link is hinged to the frame column or the shear wall or the supporting frame.

3. The self-balancing composite energy dissipation system according to claim 1, wherein the initial acute angle between the first support rod and the second support rod is [15̊, 45̊].

4. The self-balancing composite energy dissipation system according to claim 1, characterized in that: One end of the damper is hinged to the first support rod or the second support rod. 5 . The self-balancing composite energy dissipation system according to claim 1 , wherein the damper comprises 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 respectively connected through end connection hinges.

6. The self-balancing composite energy dissipation system according to claim 5, characterized in that: The first damper is a velocity damper or a displacement damper, and the second damper is a velocity damper or a displacement damper.

7. The self-balancing composite energy dissipation system according to claim 6, characterized in that: The first damper is a viscous damper with a velocity index less than 1, and the second damper is a viscous damper with a velocity index greater than or equal to 1.

8. The self-balancing composite energy dissipation system according to claim 1, wherein the cantilever truss chords and diagonal webs are ordinary steel supports.

9. The self-balancing composite energy dissipation system according to claim 1, wherein the chord members and diagonal web members are displacement dampers, and the displacement dampers are buckling restrained supports or friction dampers.

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