CN112081262A - Multiple displacement amplification connecting mechanism and self-balancing composite energy dissipation system - Google Patents
Multiple displacement amplification connecting mechanism and self-balancing composite energy dissipation system Download PDFInfo
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- CN112081262A CN112081262A CN202010976541.3A CN202010976541A CN112081262A CN 112081262 A CN112081262 A CN 112081262A CN 202010976541 A CN202010976541 A CN 202010976541A CN 112081262 A CN112081262 A CN 112081262A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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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
Technical Field
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.
Background
The energy dissipation and shock absorption technology is one of the most important achievements of earthquake engineering in the world in the last 50 years, and the damper serving as an energy dissipation and shock absorption product is widely applied to building structures and bridges, and makes important contribution to ensuring the life and property safety of people. The deformation of the building structure is transmitted to the damper under the vibration of earthquake or wind load, the energy consumption is started after the deformation of the damper reaches the yield displacement, the earthquake or vibration effect is consumed, and the safety of the main body structure is protected. The larger the deformation (displacement) of the damper is, the larger the working efficiency is, and the more obvious the energy dissipation effect is. The working efficiency of the damper is greatly influenced by the arrangement mode of the damper, the displacement amplification factor (f is the displacement of the damper/the horizontal displacement between structural layers) is generally adopted to evaluate the working efficiency of the damper, and the traditional damper arrangement modes mainly comprise a wall type (shown in figure 1), a support type (shown in figure 2), a shear connection type (shown in figure 3) and an amplification type; the damper amplification type arrangement is roughly divided into a toggle type (as shown in figure 4) and an arm extension type (as shown in figure 5) according to different amplification modes. The wall type, the support type and the shear connection type mainly utilize the deformation between the structural layers to play the energy consumption role of the damper, the displacement amplification coefficients of the damper are less than 1.0, the working efficiency is not high, and a certain energy consumption effect can be achieved only by arranging a large number of dampers in a building structure. The toggle type is a mechanical amplification type mechanism, and its displacement amplification factor is f ═ sin theta1/cos(θ1+θ2)+sinθ2，θ1Is the angle between the upper supporting rod and the vertical direction, theta2The angle between the lower support rod and the horizontal direction is the angle between the lower support rod and the horizontal direction, the displacement amplification effect only depends on the obtuse angle between the two toggle support rods, and the initial angleWhen the displacement amplification factor is smaller than 1.0 when the displacement amplification factor is over-small, and when the initial included angle is over-large, the displacement amplification factor is larger than 4.0, but if the interlayer deformation of the structure is over-large, the included angle deformation room which can be exerted by the toggle support is rapidly reduced, after three points which are close to 180 degrees are collinear, the internal force of the support rod is rapidly increased to infinity, the damage failure is caused, so that the displacement amplification factor of the toggle damper which is reasonably designed in engineering application is 2.0-3.5, and the acute angle included angle corresponding to the toggle two connecting rods is [13 degrees ], 23 degrees]. The arrangement mode of the extension arm type damper improves the working efficiency of the damper arranged at the tail end of the extension arm through the lever amplification effect of the extension arm, the displacement amplification coefficient is related to the ratio of the length of the extension arm to the height of the extension arm, the size of the extension arm arranged between building structural layers depends on the height ratio between the structural layers, and therefore the displacement amplification coefficient is generally 2.0-4.0. The two damper amplification type arrangements have the problem of limited displacement amplification effect, the actual design range of the included angle of the two connecting rods of the toggle type damper is small, the requirement on the installation precision is high, and the design and the structure of the cantilever type damper are greatly influenced by the use conditions of the building.
The energy dissipation dampers of buildings are classified into velocity type dampers, displacement type dampers and composite type dampers according to their types. The energy consumption capability of the velocity type damper is related to the relative velocity of two ends of the damper, such as a viscous damper, a viscoelastic damper and the like; the energy consumption capacity of the displacement type damper is related to the relative displacement of two ends of the damper, such as a buckling restrained brace, a friction damper and the like; the energy consumption capability of the composite damper is related to the relative displacement and the relative speed of two ends of the damper, such as a lead viscoelastic damper and the like. Among various energy dissipation dampers for buildings, a velocity type viscous damper is a damping device which mainly comprises a cylinder body, a piston, a viscous material and the like and utilizes viscous damping generated when the liquid viscous material moves to dissipate energy. The viscous damper has small self rigidity, enough large deformation capacity and excellent force and displacement hysteretic performance and fatigue performance, can effectively reduce the reaction of the structure under the action of various dynamic loads, and is commonly used for controlling earthquake and wind vibration of high-rise structures. One of the main design control parameters of the viscous damper is a velocity index α, the application range of the velocity index in engineering is mainly in an α ═ 0.15-1 interval, as shown in fig. 6, a graph of the damping force and the velocity index of the viscous damper is shown, in the range, when the mechanical property of the damper is that the velocity index α is 1, the output force and the velocity of the viscous damper are in a linear relation, that is, the increasing amplitude of the force is the same as the increasing amplitude of the velocity; when alpha is not equal to 1, the relationship between the output force and the speed of the viscous damper is a nonlinear relationship; particularly, when the speed is not large, for the viscous damper with alpha <1, namely the increasing amplitude of the force is smaller than the increasing amplitude of the speed, the smaller alpha is, the better the energy consumption effect of the damper is; when alpha is larger than 1, the force increases more than the speed, the energy consumption area is small, and the force increases more rapidly with the speed. Therefore, in the prior art, a viscous damper with high early energy consumption capability and a speed index of alpha <1 is generally adopted.
How to effectively improve the working efficiency of the damper under the condition of limited interlayer deformation of the building structure, give full play to the energy consumption effect of the damper, and are increasingly concerned by the majority of engineers. In addition, the damper with single energy consumption effect can not meet the energy consumption requirements of the structure in different working stages, and how to construct an energy dissipation system with composite energy consumption capability also gradually becomes a research hotspot of engineering and academic circles.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a multiple displacement amplification connection mechanism, which forms a link mechanism with high stability, fast response, large deformation and multiple replay through an organic connection structure of a cantilever truss, a toggle two-link and a structure, and forms a stress self-balancing energy dissipation system with a damper connected inside the mechanism, and multiple amplification of the axial displacement of the damper is performed to multiply amplify the damping action of the damper step by step, thereby achieving the purposes of high amplification efficiency, fast response, self-balancing, large deformation and damping energy dissipation. Another object of the present invention is to provide a self-balancing composite energy dissipation system, wherein two dampers with different speed parameters are connected in parallel, when one damper fails, the use of the whole damper is not affected, the two dampers with different parameters can be complemented to continuously increase the composite damping force, and in addition, the cantilever truss chord member or the diagonal web member adopts a support rod formed by a displacement type damper, so that the composite energy dissipation function of the energy dissipation system can be further realized.
Based on the structure, the invention provides a multiple displacement amplification connecting mechanism which comprises a first supporting rod, a second supporting rod, a cantilever truss and a structure, wherein the cantilever truss is fixedly connected to the structure, one end of the first supporting rod is hinged with one end of the second supporting rod to form a toggle joint two connecting rod with a middle movable hinge, the first supporting rod and the second supporting rod of the toggle joint two connecting rod are arranged in an included angle mode, the other end of the first supporting rod is hinged to the tail end of the cantilever truss, and the other end of the second supporting rod is hinged to the structure.
Preferably, the initial acute included angle between the first support bar and the second support bar is [15 degrees, 45 degrees ].
Preferably, 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 in the toggle joint two-link is hinged to the frame column or the shear wall or the support frame.
A technical scheme of a self-balancing composite energy dissipation system comprises a damper and the multiple displacement amplification connecting mechanism of claim 1, wherein one end of the damper is hinged to a middle movable hinge of the toggle two connecting rods, and the other end of the damper is hinged to the tail end of the cantilever truss and does not coincide with a hinge point of the other end of the first supporting rod.
Preferably, 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 the second support rod.
Preferably, the damper is a first damper and a second damper which are arranged in parallel, and two ends of the first damper are hinged with two ends of the second damper through end connection.
Preferably, 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.
Preferably, the first damper is a viscous damper with a velocity index smaller than 1, and the second damper is a viscous damper with a velocity index larger than 1.
Preferably, the cantilever truss is formed by connecting cantilever truss chords and cantilever truss web members, the truss web members comprise inclined web members and/or vertical web members, and the cantilever truss chords and the inclined web members are supported by common steel.
Preferably, the chord member and the diagonal web member are displacement dampers, and the displacement dampers are buckling restrained braces or friction dampers.
Has the advantages that: the multiple displacement amplification connecting mechanism can convert the deformation of the structure into the rotation deformation of the tail end of the cantilever truss with the first replay large stroke effect, and drive the toggle two connecting rods which are hinged at the tail end of the cantilever truss and have the second amplification stroke effect to form the connecting rod mechanism with the double amplification forming effect. One end of a damper of the self-balancing composite energy dissipation system is hinged to a movable hinge in the middle of the toggle two connecting rods, the other end of the damper is hinged to the cantilever truss, and the hinge point of the damper and the other end of the first supporting rod in the toggle two connecting rods is not overlapped, so that the damper deforms and has a triple stroke amplification effect. When the other end of the second support rod in the toggle joint two connecting rod is hinged on the shear wall or the support frame, the damper is beneficial to deformation to obtain a remarkable quadruple stroke amplification effect, and the displacement amplification coefficient of the damper can reach more than 6.0. The displacement amplification coefficient of the damper can be adjusted and selected according to actual requirements, and the controllability is very obvious. The number of dampers required for building structures bearing the same vibration effect is greatly reduced, thereby reducing the construction cost. The damper is arranged in the multiple displacement amplification connecting mechanism and is not directly connected with a structure, so that the cantilever truss, the damper and the toggle two connecting rods are connected in a two-to-two mode in a traction mode to form a stable out-of-plane self-balancing state and a power self-balancing state, the energy dissipation system greatly simplifies out-of-plane stable construction measures, and the damper is clear in force transfer, economic, reasonable, safe and reliable.
In addition, the two dampers which are arranged in parallel adopt viscous dampers or displacement dampers simultaneously, so that the damping superposition amplification effect of the dampers of the same type can be realized; if the two dampers arranged in parallel respectively adopt different types of dampers, the purpose of compound energy consumption of the energy dissipation system can be realized, and the energy consumption requirements of the structure at different working stages are met. And when one damper breaks down, the use of the whole energy dissipation system is not influenced. The cantilever truss in the truss form has high rigidity, the rod piece has definite and direct force transfer, the material application efficiency is high, and the damper can be ensured to fully exert the large-deformation damping energy dissipation effect. When the displacement type damper is adopted to replace the rod piece of the cantilever truss wholly or partially, the high bearing capacity energy consumption characteristic of the displacement type damper can be exerted, the damper connected with the toggle two-connecting rod is stressed and consumes energy in a composite mode, the damping energy consumption capacity is stable and continuously increased, and the energy consumption requirements of the structure in different working stages are met.
Drawings
FIG. 1 is a schematic exploded view of a prior art damper wall type arrangement and its variation;
FIG. 2 is an exploded view of a prior art damper support type arrangement and its variants;
FIG. 3 is an exploded view of a prior art damper shear-type arrangement and its variation;
FIG. 4 is an exploded schematic view of a prior art damper toggle-type arrangement and its variation;
FIG. 5 is an exploded view of a prior art damper boom type arrangement and its variants;
FIG. 6 is a graph of damping force versus velocity index for a viscous damper;
figure 7 is a schematic diagram showing the deformation of an embodiment of the energy dissipating system of the present invention with the damper displaced to an enlarged extent;
figure 8 is a schematic diagram of the internal force transmission path of an embodiment of the energy dissipater system of the present invention;
figure 9 is a first schematic view of the energy dissipating system of the present invention;
figure 10 is a second schematic structural view of the energy dissipating system of the present invention;
figure 11 is a schematic view of juxtaposed dampers of the energy dissipating system of the present invention;
figure 12 is a third schematic view of the energy dissipating system of the present invention.
Wherein, 1, a first supporting rod; 2. a second support bar; 11. the middle part is movably hinged; 12. a toggle two link; 31. a cantilever truss chord; 32. a cantilever truss web member; 321. a cantilever truss diagonal web member; 322. a cantilever truss vertical web member; 41. shear walls or support frames; 42. frame columns or shear walls or support frames; 5. a damper; 51. a first damper; 52. a second damper; 53. the end part is connected with a hinge; 6. and (4) buckling restrained brace.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
An embodiment of a self-balancing composite energy dissipation system is shown in figure 9, and comprises a damper 5, a multiple displacement amplification connecting mechanism, a first supporting rod 1, a second supporting rod 2, a cantilever truss and a structure, wherein the cantilever truss is fixedly connected to the structure, one end of the first supporting rod 1 is hinged with one end of the second supporting rod 2 to form a toggle joint two connecting rod 12 with a middle movable hinge 11, the first supporting rod 1 and the second supporting rod 2 of the toggle joint two connecting rod 12 are arranged at an included angle, the other end of the first supporting rod 1 is hinged at the tail end of the cantilever truss, and the other end of the second supporting rod 2 is hinged on the structure. One end of the damper 5 is hinged on a middle movable hinge 11 of the toggle joint two-connecting rod 12, and the other end of the damper 5 is hinged on the cantilever truss and is not overlapped with the hinged point of the other end of the first supporting rod 1. 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 41, and the other end of the second support rod 2 in the toggle two-link 12 is hinged to the frame column or the shear wall or the support frame 42.
One end of a damper 5 in the energy dissipation system is hinged on a movable hinge 11 in the middle of a toggle joint two-connecting rod 12, and the toggle joint two-connecting rod 12 connected between the tail end of the cantilever truss and a structure can drive the damper 5 connected with the toggle joint two-connecting rod to move in an opening and closing mode under the state of a certain included angle; the cantilever truss is fixedly connected to the structure, so that the deformation of the structure can be converted and transmitted to the tail end of the cantilever truss, the other end of the first support rod 1 in the toggle joint two connecting rod 12 is hinged to the tail end of the cantilever truss, the other end of the damper 5 is hinged to the tail end of the cantilever truss, a hinge joint of the damper 5 and the other end of the first support rod 1 in the toggle joint two connecting rod 12 is not heavy, a connecting rod mechanism with high stability, quick response and large deformation and replay is formed through the organic connection structure of the cantilever truss, the toggle joint two connecting rod 12 and the structure, a force-bearing self-balancing energy dissipation system is formed with the damper 5 connected inside the mechanism, the damping effect of the damper 5 is multiply amplified step by step through multiply amplifying the axial displacement of the damper 5, and the purposes of high amplification efficiency, quick response, self-balancing and large deformation.
Wherein, fig. 7 is a schematic diagram illustrating the displacement of the damper according to the embodiment of the present invention, and the opening and closing movements of the toggle joint two-link 12 under a certain angle have the effect of enlarging the stroke (e.g. θ)1＝34°，θ2The displacement amplification factor of the toggle two-link 12 is set to f at 37.7 DEG10＝sinθ1/cos(θ1+θ2)+sinθ22.5) and a planar space truss fixedly attached to the structure, the deformation of the structure being converted into a rotational deformation of the truss ends, the rotational deformation having a long-range effect (e.g., L)1And 2H, the displacement amplification factor f2 is set to be 2.0), and the two toggle links 12 hinged at the tail ends of the cantilever trusses are driven to generate double amplification stroke effects, through theoretical derivation and equivalent calculation, the displacement amplification factor f1 of the two toggle links 12 driven by the cantilever trusses is approximately equal to the product of the displacement amplification factors of the two serially-connected combined units (the cantilever trusses and the two toggle links 12), namely f1 is approximately equal to f10, f2 is equal to 2.5, 2.0 is equal to 5.0, and the deformation of the damper 5 hinged on the movable hinge 11 in the middle of the two toggle links 12 is obviously amplified. In addition, because the displacement of the other end of the damper 5 is directly amplified by the tail end of the cantilever truss to generate a triple amplification stroke effect, the displacement amplification coefficient f of the multiple displacement amplification connecting mechanism is approximately equal to the dampingThe displacement amplification coefficients of two parallel combination units (the cantilever truss, the cantilever truss and the toggle two-link 12) at two ends of the damper 5 are added, namely, f is approximately equal to f1+ f20 is 5.0+1.0 is 6.0, the deformation (displacement) of the damper 5 is remarkably amplified, the displacement amplification coefficient of the damper 5 can be adjusted and selected according to actual requirements, and the controllability is very obvious. The number of dampers required for building structures bearing the same vibration effect is greatly reduced, thereby reducing the construction cost.
In the high-rise structure, the bending deformation of the shear wall and the support frame (41, 42) is positively correlated with the structure height, the frame column 42 has small bending deformation and large shearing deformation, so that when the cantilever truss is fixedly connected to the shear wall and the support frame 41 with stronger rigidity, the structural deformation can be favorably and smoothly converted into the rotary deformation at the tail end of the cantilever truss, the other end of the second support rod 2 in the toggle joint two-connecting rod 12 can be hinged to the frame column or the shear wall or the support frame 42, and if the other end of the second support rod 2 is hinged to the shear wall or the support frame 42 with the same rotary action, the displacement amplification coefficients of the connecting mechanism can be favorably doubled and superposed, the quadruple amplification stroke effect of the connecting mechanism is realized, and the effectiveness, universality and amplification efficiency of the connecting mechanism are further improved.
The damper 5 of the self-balancing composite energy dissipation system is arranged in the multiple displacement amplification connecting mechanism and is not directly connected with a structure, one end of the damper 5 is hinged on a movable hinge 11 in the middle of a toggle joint two connecting rod 12, the other end of the damper 5 is hinged on the cantilever truss, and a hinge point connected with the first supporting rod 1 and the cantilever truss is not overlapped, so that the cantilever truss, the damper 5 and the toggle joint two connecting rod 12 are connected in a two-to-two mode to form a stable out-of-plane self-balancing state, the out-of-plane stability of the energy dissipation system is greatly improved, the feasibility of the connecting mechanism and the whole out-of-plane self-balancing of the energy dissipation system is realized, and the constructional measures for keeping the out-of-. In addition, the energy dissipation system also has the dynamic self-balancing characteristic, and the internal force transmission path of the energy dissipation system in the motion working state is shown in figure 8. As can be seen from fig. 8, the external force is automatically circulated and digested in the connecting mechanism and the damper 5, the force transmission path is short, direct and clear, and the purpose of power self-balancing under the motion working state is achieved, so that the rods which are pulled and pressed in the energy dissipation system can fully exert the bearing capacity of the respective material, and the required rods have small sections; meanwhile, the number of force transmission inlets and outlets connected with the energy dissipation system and the structure is only three, the minimum number of force transmission points is required for the force transmission balance state of the plane space assembly, and the force transmission points are concentrated, so that the structure is convenient and simple to design. In conclusion, the innovative self-balancing structure of the invention ensures that the energy dissipation system has definite force transmission, is economic and reasonable, and is safe and reliable.
Preferably, the initial acute included angle between the first support bar 1 and the second support bar 2 in the toggle two-link 12 is [15 °, 45 ° ]. Because the displacement amplification factor f of the traditional toggle joint two connecting rods 12 is larger than 1.0, the corresponding initial acute angle is 40 degrees, and the displacement amplification factor commonly used in engineering application is 3.5-2.0, the corresponding initial acute angle of the toggle joint two connecting rods 12 is 13 degrees and 23 degrees, namely the displacement amplification factor 3.5 corresponds to 13 degrees, the displacement amplification factor 2.0 corresponds to 23 degrees, and the smaller the initial acute angle is, the larger the displacement amplification factor is. Due to the double amplification stroke effect of the cantilever truss on the toggle joint two-link 12, when the displacement amplification factor f of the toggle joint two-link 12 is larger than 1.0, the corresponding initial acute angle included angle is increased from 40 degrees to 65 degrees, when the displacement amplification factor f is 2.0, the corresponding initial acute angle included angle is increased from 23 degrees to 45 degrees, when the displacement amplification factor is 6.0, the corresponding initial acute angle included angle is 15 degrees, meanwhile, in order to avoid the critical state that the first support rod 1 and the second support rod 2 of the toggle joint two-link 12 are collinear in the movement process, the initial acute angle included angle of the toggle joint two-link 12 acted by the double amplification stroke is not less than 15 degrees at least, the initial acute angle included angle of the toggle joint two-link 12 of the invention is taken as [15 degrees and 45 degrees ], the change range of the initial acute angle included angle of the toggle joint two-link of the invention is about 3 times of the change range of the obtuse angle of, the mechanism has quick deformation response and high amplification efficiency, so that the adaptability, the arrangement diversity and the installation feasibility of the energy dissipation system to the use of building space are obviously improved.
One end of the damper 5 is hinged to the first support rod 1 or the second support rod 2, as shown in fig. 10, so that flexible installation and rapid and stable force transmission of the damper can be realized.
The damper 5 is a first damper 51 and a second damper 52 which are arranged in parallel, and two ends of the first damper 51 are connected with two ends of the second damper 52 through end connecting hinges 53, as shown in fig. 10 to 11. The damper 5 is a first damper 51 and a second damper 52 which are arranged in parallel, a 50-150 mm interval is reserved, interference is avoided, and two ends of the first damper 51 are connected with two ends of the second damper 52 through end connecting hinges 53. The two dampers arranged in parallel can achieve the energy dissipation effect of amplified damping, and when one damper breaks down, the use of the whole energy dissipation system is not influenced.
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. The two dampers arranged in parallel simultaneously adopt viscous dampers or displacement dampers, so that the damping superposition amplification effect of the dampers of the same type can be realized; if the two dampers arranged in parallel respectively adopt different types of dampers, the purpose of composite energy consumption of the energy dissipation system can be realized.
The first damper 51 is a viscous damper with a velocity index less than 1, and the second damper 52 is a viscous damper with a velocity index greater than or equal to 1. The viscous dampers with two different parameters arranged in parallel can amplify the energy consumption capability of the dampers and simultaneously enable the energy consumption capability of the dampers to be continuous, and the energy dissipation effect is prevented from being reduced due to the fact that the later damping force of the viscous dampers with the speed index smaller than 1 is slowly increased; when the earlier deformation (speed) of the energy dissipation system is not large, the first damper 51 with the speed index alpha <1 consumes energy remarkably, is a main energy consumption component, the second damper 52 with the speed index alpha >1 exerts small force and has small energy consumption effect, and the effect of the viscous damper with the speed index alpha <1 is not influenced; when the later deformation of the energy dissipation system is increased, the energy consumption increasing effect of the first damper 51 with the speed index alpha <1 is limited, but a certain amount of energy consumption can be maintained, the damping force and the energy consumption effect of the second damper 52 with the speed index alpha >1 are gradually exerted, the damping force is rapidly increased, so that in the whole vibration (vibration) process of the building structure, the damping force can be continuously generated in the whole vibration (vibration) process and cannot be weakened, at the moment, the two dampers are stressed and consume energy in a combined mode, the stability and the continuous increase of the damping energy consumption capacity are realized, and the energy consumption requirements of the structure in different working stages are met.
The cantilever truss is formed by connecting a cantilever truss chord member 31 and a cantilever truss web member 32, the truss web member 32 comprises an oblique web member 321 and/or a vertical web member 322, and the cantilever truss chord member 31 and the oblique web member 321 are supported by common steel, as shown in fig. 10. The embodiment of the invention is formed by connecting the chord member 31 and the web member 32 which are made of common steel supporting materials in a welding or hinging way, the web member can also adjust the rigidity and the stress performance of the cantilever truss in a mode of the inclined web member 321 and/or the vertical web member 322 according to the actual situation, and the cantilever truss is ensured to have the advantages of high rigidity, flexible structure and installation, light weight and definite force transmission, thereby the interlaminar deformation of a structure is completely transmitted to the toggle two connecting rods 12 through the rotation of the cantilever truss, and the damper 5 is ensured to fully exert the large-deformation damping energy consumption effect
The chord 31 and the diagonal web 321 are displacement dampers, and the displacement dampers are buckling restrained braces 6 or friction dampers, as shown in fig. 12. As the buckling bearing capacity of the steel support is far smaller than the yield bearing capacity, the buckling instability phenomenon is easy to occur before the material is fully exerted, and the stable and continuous bearing capacity and rigidity capacity are lost. In order to ensure that the buckling instability of the common steel support does not occur, the buckling bearing capacity of the common steel support is further improved by adopting an enlarged section method in a conventional means, so that the material consumption is increased, and the related construction difficulty is correspondingly increased. Another method for improving the stable bearing capacity is to adopt a displacement damper, such as a buckling restrained brace 6 or a friction damper, which not only has large initial rigidity and high bearing capacity, but also has the advantages of controllable rigidity, good energy consumption effect, stable hysteresis performance and the like. The cantilever truss with enough rigidity is constructed by equivalently replacing all or part of chord members or diagonal web members in the cantilever truss by buckling restrained braces 6 or friction dampers, the characteristics of high rigidity and high bearing capacity energy consumption of the displacement type damper are properly exerted under the condition that the opening and closing movement of the toggle two connecting rods 12 is met and the deformation of the damper 5 is fully exerted, the damper 5 connected with the toggle two connecting rods 12 is stressed and consumes energy in a combined way, the stability and continuous increase of the damping energy consumption capacity are realized, and the energy consumption requirements of the structure at different working stages are met.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976541.3A CN112081262A (en) | 2020-09-16 | 2020-09-16 | Multiple displacement amplification connecting mechanism and self-balancing composite energy dissipation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010976541.3A CN112081262A (en) | 2020-09-16 | 2020-09-16 | Multiple displacement amplification connecting mechanism and self-balancing composite energy dissipation system |
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| CN112081262A true CN112081262A (en) | 2020-12-15 |
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| CN202010976541.3A Pending CN112081262A (en) | 2020-09-16 | 2020-09-16 | Multiple displacement amplification connecting mechanism and self-balancing composite energy dissipation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117513579A (en) * | 2024-01-05 | 2024-02-06 | 中国二十二冶集团有限公司 | Self-resetting swinging structure with elbow type viscous damper |
-
2020
- 2020-09-16 CN CN202010976541.3A patent/CN112081262A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117513579A (en) * | 2024-01-05 | 2024-02-06 | 中国二十二冶集团有限公司 | Self-resetting swinging structure with elbow type viscous damper |
| CN117513579B (en) * | 2024-01-05 | 2024-03-26 | 中国二十二冶集团有限公司 | Self-resetting swinging structure with elbow type viscous damper |
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