Cross-layer damping system flexibly connected with self-resetting dampers and damping method of cross-layer damping system

Abstract

The invention discloses a cross-layer shock absorption system flexibly connected with self-resetting dampers and a shock absorption method of the cross-layer shock absorption system, and belongs to the technical field of shock resistance and shock absorption of high-rise and super high-rise structures. According to the technical scheme, the device comprises a fixed pulley, a damper element, an inhaul cable and a clamp, the fixed pulley is fixedly connected to a beam and can rotate, one end of the inhaul cable is fixedly connected to a column foot in a cross-layer mode and is fixedly connected with the damper element through the fixed pulley in an X-shaped or V-shaped crossing mode, the clamp provides pretension for the inhaul cable, and the two ends of the damper element are fixedly connected with the two ends of the inhaul cable respectively. And the cross-layer displacement transmitted by the inhaul cable horizontally moves through the fixed pulley, so that the damper element is driven to consume energy. The invention has the beneficial effects that the connection mode is simple and easy to use, and the technical difficulty is low; after installation is completed, under external excitation of the structure, the inhaul cable drives the damper to dissipate energy through cross-layer displacement, the external excitation effect is reduced, due to the existence of pretension, in the elastic range, the inhaul cable drives the damper to still reset, and the safety of the structure is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-rise, super high-rise structure seismic damping technology, in particular to a self-centering damper flexible connection cross-layer damping system and its damping method, which can be used in the reinforcement and damping of high-rise, super high-rise buildings and ordinary old buildings in service. BACKGROUND

[0002] With the increasing height and complexity of high-rise building structure, the existing structural system is difficult to meet the requirements of seismic and wind vibration, and the most economical and effective method to solve this problem is to use energy dissipation technology. However, due to the characteristics of high-rise building structure system (such as frame-tube structure) with large stiffness, the interlayer deformation is relatively small under frequent earthquakes, or the damper arrangement position is limited due to certain specific conditions (such as conflict with important equipment), which makes the damping performance of the damper not fully play.

[0003] The traditional damper arrangement form (such as layer-by-layer distribution, top suspension TMD) has low working efficiency, and usually needs to arrange more dampers layer by layer to meet the demand, which increases the engineering cost and affects the building use function.

[0004] How to solve the above problems is the research topic of the present application. SUMMARY

[0005] In order to solve the above problems, the present application provides a self-centering damper flexible connection cross-layer damping system and its damping method, which aims to overcome the shortcomings of the existing high-rise, super high-rise structure damper arrangement form. The self-centering damper flexible connection cross-layer damping system is adopted, the connection technology of the damper is more simple and convenient, the post-earthquake repair or replacement is easier, the damper after connection should have self-centering function, and the working displacement and speed of the damper can be increased, which makes up for the problem of small interlayer displacement of high-rise, super high-rise structure with large lateral stiffness. Without changing the existing structure form, the interlayer displacement of the structure is utilized to make the damper energy dissipation fully play.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] A self-centering damper flexible connection cross-layer damping system, comprising a fixed pulley, a damper element, a cable and a clamp; the fixed pulley is fixed on the beam and has a guiding function and can rotate; one end of the cable is fixed to the column foot across the layers, and is fixed to the damper element through the fixed pulley in X or V shape; the clamp provides pre-tension for the cable, and the damper element can be adjusted to the appropriate position through the clamp; the lower part of the damper element is fixed to the beam, and the upper part is connected with the cable, and the cross-layer displacement transmitted by the cable can be moved horizontally through the fixed pulley, thereby driving the damper element to dissipate energy.

[0008] For the shear type damper, the traditional damper arrangement often needs the upper and lower ends of the damper to be fixed to the upper and lower beams between the interlayers through the connecting pieces, the bending stiffness of the connecting pieces needs to be repeatedly calculated, and the damper can only effectively utilize the interlayer displacement of a certain layer, and the working efficiency is low. The end of the damper is connected to the cable instead of being fixed.

[0009] The cable is flexible, and can be high-strength prestressed steel strand, steel wire rope or steel wire bundle, etc.

[0010] The lower part of the damper element is fixed to the beam, and the upper two ends are connected to the cable and move horizontally with the cable, mainly playing an energy dissipation role. The fixed pulley has a guiding function and can horizontally transmit the interlayer displacement to the damper element.

[0011] The damper element is arranged on the upper part of the structure, and the cable is fixed on the lower part of the structure.

[0012] The damper element is arranged on the lower part of the structure, and the cable is arranged on the lower part of the structure.

[0013] The arrangement form of the cable and the damper element can be that the damper element is arranged on the upper part of the structure, and the cable is fixed on the lower part of the structure, or the damper element is arranged on the lower part of the structure, and the cable is arranged on the lower part of the structure.

[0014] The clamp provides pre-tension for the cable, and in the elastic range, the damper element has a reset function.

[0015] It also includes a lever;

[0016] The fixed pulley is fixed on the beam, and the fixed pulley can rotate; one end of the cable is fixed to the column foot across the layers, and is connected to the power arm of the lever through the fixed pulley and the X-shaped cross, one end of the damper element is connected to the resistance arm of the lever, and one end is fixed to the beam-column joint; the clamp provides pre-tension for the cable, and adjusts the damper element to be in the appropriate position through the clamp; the cable can transmit the interlayer displacement to the lever through the fixed pulley, and then transmit it to the damper element after being amplified again by the lever.

[0017] In order to achieve the above-mentioned purposes, the application further provides a damping method of a self-resetting damper flexible connection interlayer damping system, including the following steps:

[0018] S1, establish a finite element model of the building to be damped, take the dynamic response of the building under earthquake and wind vibration as the optimization target, use the exponential distribution optimizer EDO to collaboratively optimize and solve the type of damper (2), the cross-sectional area of the cable (3), the arrangement form of the cable (3) and the size of the pre-tension, and determine the optimal configuration parameters of the interlayer damping system;

[0019] S2, set a fixed pulley at the beam or beam-column joint of the upper or lower part of the structure, which can rotate freely, for changing the force transmission direction of the cable;

[0020] S3, anchor one end of the flexible cable to the lower column foot or the corresponding node of the structure, and cross several floors at the other end, then change direction through the fixed pulley and connect with the damper element, forming X-shaped or V-shaped cable arrangement;

[0021] S4, apply pre-tension to the cable through clamps or anchors, so that the damper element is in the initial working position under static force and has reset ability within the elastic deformation range;

[0022] S5, when the structure produces interlayer displacement under external excitation, the cable converts the interlayer displacement into horizontal displacement through the fixed pulley, driving the damper element to produce relative motion;

[0023] S6, the damper element dissipates energy during horizontal motion, reduces structural response, and achieves the purpose of damping;

[0024] S7, after the action of earthquake or wind vibration ends, the damper element automatically resets relying on the pre-tension of the cable and the elastic recovery ability, maintaining the continuous working ability of the system.

[0025] The cable can span a certain number of floors, which can be determined according to the actual engineering needs.

[0026] The self-resetting damper flexible connection interlayer damping system can not only be used for seismic damping of high-rise and super high-rise structures, but also be used for reinforcement and reconstruction of old buildings in service.

[0027] The fixed pulley, cable and clamp are simple and economical connecting components, and their connection method is simple and easy to use, with low technical difficulty. The process of traditional damper arrangement and design is simplified, and only the number of floors that the cable needs to span needs to be calculated during the construction stage. After installation, the cable drives the damper to dissipate energy under external excitation, reducing the effect of external excitation. Due to the existence of pre-tension, the cable can still reset the damper within the elastic range, ensuring the safety of the structure.

[0028] Preferably, the exponential distribution optimizer EDO is used in step S1 to collaboratively optimize and solve the damper (2) type, the cross-sectional area of the cable (3), the arrangement of the cable (3), and the size of the pre-tension, to determine the optimal configuration parameters of the interlayer damping system, including the following steps:

[0029] S101, define the solution space, which is a mixed variable space, including discrete variables representing the damper (2) type, continuous variables representing the cross-sectional area of the cable (3), discrete variables representing the arrangement of the cable (3), and continuous variables representing the size of the pre-tension; randomly generate an initial population containing N candidate solutions in the solution space;

[0030] Further, assuming that the dimension of the candidate solution is D, the population X can be expressed as:

[0031]

[0032] S102, substitute the parameter combination represented by each candidate solution in the population into the finite element model of the building to be damped for analysis, and extract the dynamic response results of the structure;

[0033] S103, the dynamic response results of the building under earthquake and wind vibration are used as the fitness value of each candidate solution;

[0034] S104, the standard exponential distribution optimizer EDO is improved as follows to adapt to the mixed variable space:

[0035] For continuous variables, directly apply the update formula of the standard exponential distribution optimizer EDO;

[0036] For discrete variables, the index corresponding to the candidate category is treated as an integer, and after updating, it is rounded and boundary processed, and then mapped back to the corresponding physical category;

[0037] Further, the update method of the exponential distribution optimizer EDO is as follows:

[0038] (1) Find the global optimal solution by guiding solution = , where t is the iteration number, is the top three solutions with the optimal fitness value in the tth iteration;

[0039] (2) In the development stage, the position update of the ith candidate solution is as follows:

[0040]

[0041]

[0042] where rand represents a random number in [0, 1], denotes the exponential variance, is the current vector position of the i-th candidate solution in the t-th iteration; is the updated vector position of the i-th candidate solution in the t-th iteration; denotes the comparison of the fitness values of the two after the t-th iteration is updated, and the better one is selected as the new ;

[0043] (3) In the exploration stage, the position updating formula of the i-th individual is as follows:

[0044]

[0045] wherein, denotes the average position of the population, that is:

[0046]

[0047] Other parameters are defined as follows:

[0048]

[0049] wherein, r1 and r2 denote the serial numbers of two different individuals randomly selected from the population;

[0050] S105, repeat steps S102 to S104 until the maximum iteration number GEN is met, and output the parameter combination represented by the global optimal individual as the optimal configuration parameter.

[0051] Compared with the prior art, the beneficial effects of the present application are that the present application provides a cross-layer damping system with flexible connection of self-resetting dampers and a damping method thereof, which converts the cross-layer displacement of the structure under an earthquake into the displacement of the dampers through a pulley, is flexible in arrangement, and has a self-resetting function, and the advantages mainly lie in the following aspects:

[0052] (1) The present application changes the traditional damper into a flexible connection of a cable, and based on the properties of the cable, the bending stiffness of the connecting piece does not need to be considered, the construction technology is simple, the design is more convenient, and the popularization of damping technology is facilitated;

[0053] (2) The cross-layer flexible connection damper of the present application can reduce the number of damper arrangements by using the cross-layer displacement of the structure, so that the cost of structural damping is greatly reduced;

[0054] (3) The present application can freely change the arrangement of the dampers according to the form of the building, such as placing the dampers in the reinforced layer or the equipment layer which has weak function, and the cable is arranged across the layers without affecting other functions of the building;

[0055] (4) The cross-layer flexible connection damper mode of the present application solves the problem of large lateral stiffness of high-rise and super high-rise structures and small interlayer displacement of single layer to some extent by using the interlayer displacement of the structure;

[0056] (5) The present application can be used for new high-rise and super high-rise buildings, and can also be used for reinforcement and reconstruction of old buildings in service. For low-rise old buildings with small width-height ratio, the system can be attached to the outside of the building for easy maintenance and replacement without affecting the use of the internal structure of the building;

[0057] (6) The present application can work with the lever system to form a flexible connection amplification damping system, further increase the interlayer displacement, reduce the amount of damping elements, and further reduce the damping cost. BRIEF DESCRIPTION OF DRAWINGS

[0058] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and are used to explain the present application, and do not constitute a limitation on the present application.

[0059] Figure 1 It is the overall schematic diagram of the damper of the embodiment of the present application.

[0060] Figure 2 It is the overall schematic diagram of the damper of the embodiment of the present application installed at high position.

[0061] Figure 3 It is the overall schematic diagram of the damper of the embodiment of the present application installed at low position.

[0062] Figure 4 It is the layer-by-layer X-shaped connection mode of the cable of the embodiment of the present application.

[0063] Figure 5 It is the layer-by-layer V-shaped connection mode of the cable of the embodiment of the present application.

[0064] Figure 6 It is a flexible cross-layer connection arrangement scheme of the damper of the high-rise structure of the present application.

[0065] Figure 7 It is a flexible cross-layer connection arrangement scheme of the damper of the old structure in service of the present application.

[0066] Figure 8 It is a flexible cross-layer connection arrangement scheme of the amplification damper of the present application.

[0067] Among them, the reference signs are: 1, fixed pulley; 2, damper element; 3, cable; 4, clamp; 5, lever. DETAILED DESCRIPTION

[0068] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0069] Embodiment 1

[0070] Referring to Figure 1 , a damping device flexible connection cross-layer damping system is another form of damping device flexible connection. The damping device flexible connection cross-layer damping system comprises a fixed pulley 1, a damping device element 2, a cable 3 and a clamp 4. The fixed pulley 1 is fixed to a beam and can rotate. The cable 3 is fixed to a column foot at one end and is X-shapedly crossed through the fixed pulley 1 and the damping device element 2. The clamp 4 provides pre-tension for the cable 3. The damping device element 2 is adjusted to be in a proper position through the clamp 4. The lower part of the damping device element 2 is fixed to the beam, and the upper part of the damping device element 2 is connected to the cable 3. The damping device element 2 can move horizontally through the fixed pulley 1 by the cross-layer displacement transmitted by the cable 3, and then drive the damping device element to dissipate energy.

[0071] Referring to Figure 2 , Figure 3 are respectively a high-position arrangement and a low-position arrangement of the damping device flexible connection, and the high-position arrangement or the low-position arrangement can be selected according to the specific situation in the specific construction. It is necessary to point out that the damping device high-position arrangement has higher interlayer displacement utilization rate than the damping device low-position arrangement, and the high-position arrangement should be preferentially considered in designing the damping device arrangement scheme.

[0072] Referring to Figure 4 , Figure 5 are respectively different arrangement forms of the damping device flexible connection cable, Figure 4 is a single-layer V-shaped connection mode, Figure 5 is a single-layer X-shaped cross connection mode. The single-layer V-shaped arrangement mode needs to arrange corresponding secondary movable pulleys on the cross-layer beam, and multiple fixed pulleys share the damping force, so as to reduce the damping force borne by the main pulley and further reduce the concentrated force at the joint, so as to ensure that the concentrated force borne by the main pulley joint is small when the cable crosses multiple layers. The single-layer X-shaped arrangement is based on the single-layer V-shaped arrangement, and two secondary pulleys are additionally arranged on the cross-layer beam. In this way, each cable passes through two horizontal secondary pulleys on the cross-layer beam, and the damping force is further dispersed to multiple secondary pulleys, so as to ensure that the concentrated force at the main pulley joint is small, thereby protecting the beam-column joint from being damaged by the concentrated force.

[0073] Figure 2 , Figure 3 , Figure 4 and Figure 5 are all arrangement forms of the damping device flexible connection, Figure 2 and Figure 3The damping element is arranged at a high position or a low position, Figure 4 With Figure 5 The cable is arranged in an X or V shape, and the flexible connection arrangement of the damper is various, which can be selected according to the specific project.

[0074] The cable 3 is flexible, and can be a high-strength prestressed steel strand, a steel wire rope or a steel wire bundle.

[0075] The lower part of the damper element 2 is fixed to the beam, and the upper part is connected to the cable 3, which moves horizontally with the cable 3, and mainly plays a role of energy dissipation. The fixed pulley has a guiding function, which can horizontally transmit the interlayer displacement to the damper element. During operation, the tensioned cable on one side is stretched, driving the damper element to dissipate energy. The energy dissipation element can be a speed type oil damper, a viscous damper, a damping wall, and a friction type damper, a displacement type metal damper, which can be linked with the cable through a specific form.

[0076] The damper element 2 is arranged at the upper part of the structure, and the cable 3 is fixed at the lower part of the structure.

[0077] The damper element 2 is arranged at the lower part of the structure, and the cable 3 is arranged at the lower part of the structure.

[0078] The arrangement form of the cable 3 and the damper element 2 can be that the damper element 2 is arranged at the upper part of the structure, and the cable 3 is fixed at the lower part of the structure, such as Figure 2 , or the damper element 2 is arranged at the lower part of the structure, and the cable 3 is arranged at the lower part of the structure, such as Figure 3 .

[0079] The clamp 4 provides pre-tension for the cable 3, and within the elastic range, the damper element 2 has a reset function.

[0080] The damping method of the interlayer damping system based on the flexible connection of the self-resetting damper includes the following steps:

[0081] S1, a finite element model of a building to be damped is established, the dynamic response of the building under earthquake and wind vibration is taken as an optimization target, an exponential distribution optimizer EDO is used to cooperatively optimize and solve the type of damper (2), the cross-sectional area of cable (3), the arrangement form of cable (3) and the size of pre-tension, and the optimal configuration parameters of the interlayer damping system are determined;

[0082] S2, a fixed pulley is arranged at the upper part or lower part of the beam or beam column joint of the structure, the fixed pulley can rotate freely, and is used to change the force transmission direction of the cable;

[0083] S3, one end of the flexible cable is anchored to the column foot or the corresponding node at the lower part of the structure, the other end crosses several floors, is turned through the fixed pulley and is connected with the damper element, forming an X-shaped or V-shaped cable arrangement;

[0084] S4, the damping element is in the initial working position in the static state and has the reset ability in the elastic deformation range by applying the pre-tension to the cable through the clamp or anchor;

[0085] S5, when the structure produces interlayer displacement under external excitation, the cable converts the interlayer displacement into horizontal displacement through the fixed pulley to drive the damping element to produce relative motion;

[0086] S6, the damping element dissipates energy during horizontal motion, reduces structural response, and achieves the purpose of shock absorption;

[0087] S7, after the action of earthquake or wind vibration ends, the damping element is automatically reset by relying on the pre-tension of the cable and the elastic recovery ability, and the system maintains the continuous working ability.

[0088] An exponential distribution optimizer EDO is used to cooperatively optimize and solve the type of the damper (2), the cross-sectional area of the cable (3), the arrangement form of the cable (3), and the size of the pre-tension, to determine the optimal configuration parameters of the interlayer damping system, and the specific operation steps are as follows:

[0089] S101, define the solution space, which is a mixed variable space including discrete variables representing the type of the damper (2), continuous variables representing the cross-sectional area of the cable (3), discrete variables representing the arrangement form of the cable (3), and continuous variables representing the size of the pre-tension; an initial population containing N candidate solutions is randomly generated in the solution space;

[0090] Specifically, setting the dimension of the candidate solution as D, the population X can be expressed as:

[0091]

[0092] S102, the parameter combination represented by each candidate solution in the population is substituted into the finite element model of the building to be damped for analysis, and the dynamic response results of the structure are extracted;

[0093] S103, the dynamic response results of the building under earthquake and wind vibration are taken as the fitness value of each candidate solution;

[0094] S104, the standard exponential distribution optimizer EDO is improved as follows to adapt to the mixed variable space:

[0095] For continuous variables, the update formula of the standard exponential distribution optimizer EDO is directly applied;

[0096] For discrete variables, the index corresponding to the candidate category is treated as an integer, and after updating, it is rounded and boundary processed, and then mapped back to the corresponding physical category;

[0097] Specifically, the update method of the exponential distribution optimizer EDO is as follows:

[0098] (1) By guiding solution = Finding the global optimal solution, where t is the number of iterations, is the first three solutions of the optimal fitness value in the tth iteration;

[0099] (2) In the development stage, the position of the ith candidate solution is updated as follows:

[0100]

[0101]

[0102] Where rand represents a random number [0, 1], Indicates the exponential variance, is the current vector position of the ith candidate solution in the tth iteration; is the updated vector position of the ith candidate solution in the tth iteration; Indicates that the fitness value of the two is compared after the tth iteration update, and the better one is called the new ;

[0103] (3) In the exploration stage, the position update formula of the ith individual is as follows:

[0104]

[0105] Where, Indicates the average position of the population, that is:

[0106]

[0107] Other parameters are defined as:

[0108]

[0109] Where r1 and r2 represent the serial numbers of two different individuals randomly selected from the population;

[0110] S105, repeat steps S102 to S104 until the maximum number of iterations GEN is met, and output the parameter combination represented by the global optimal individual as the optimal configuration parameter.

[0111] The cable 3 can span a variable number of layers, which can be determined according to the actual engineering requirements.

[0112] The self-centering damper flexible connection cross-layer seismic system can not only be used for seismic vibration reduction of high-rise and super high-rise structures, but also be used for reinforcement and reconstruction of old buildings in service.

[0113] The fixed pulley, the cable and the clamp are simple and economical connecting members, the connecting mode is simple and easy to use, the technical difficulty is low, the complex process of arranging the traditional damper layer by layer is simplified, and only the number of layers to be crossed by the cable needs to be calculated in the construction stage. After installation, under external excitation, the cable drives the damper to dissipate energy by using the cross-layer displacement, thereby reducing the effect of external excitation. Due to the presence of the pre-tension, the cable still resets the damper in the elastic range, thereby ensuring the safety of the structure.

[0114] Embodiment 2

[0115] Referring to Figure 6 A cross-layer damping system with self-resetting damper flexible connection is a high-rise structure damper flexible cross-layer connection arrangement scheme. The cross-layer damping system comprises a fixed pulley 1, a damper element 2, a cable 3 and a clamp 4. The fixed pulley 1 is fixed to a beam and can rotate. The cable 3 is fixed to a column foot at one end and is X-shapedly crossed through the fixed pulley 1 and the damper element 2. The clamp 4 provides pre-tension for the cable, and the damper element can be adjusted to an appropriate position through the clamp 4. The damper element 2 is fixed to the beam at the lower part and is connected to the cable 3 at the upper part. The damper element can move horizontally through the fixed pulley 1 by the cross-layer displacement transmitted by the cable 3, thereby driving the damper element to dissipate energy.

[0116] Referring to Figure 6 A high-rise structure damper flexible cross-layer connection arrangement scheme is provided. The damper element is arranged in a strengthened layer. The damper element is arranged in the strengthened layer in an X-shaped cross arrangement. The lateral stiffness of the strengthened layer is large, the interlayer displacement is small, and the building use function is weak. The damper element is arranged in the strengthened layer. The required damper output is calculated before actual construction. The number of layers to be crossed is calculated. Due to the guiding effect of the fixed pulley, the cross-layer interlayer displacement can be transmitted to the damper in the strengthened layer, thereby driving the damper to dissipate energy.

[0117] This arrangement does not affect other use functions of the building. To some extent, the problem of large lateral stiffness of high-rise and super high-rise structures and small single-layer interlayer displacement is solved. The bending stiffness of the connecting member does not need to be considered. The construction technology is simple. It is a safe and simple and efficient arrangement scheme. In actual construction, the arrangement can be optimized according to the specific situation on site.

[0118] Embodiment 3

[0119] Referring to Figure 7A self-resetting damper flexible connection cross-layer damping system is a damping damper flexible cross-layer connection arrangement scheme for in-service old structures. The system comprises a fixed pulley 1, a damper element 2, a cable 3, a clamp 4, the fixed pulley 1 is fixed to the beam, and the fixed pulley can rotate; one end of the cable 3 is fixed to the column foot across the layers, and the cable 3 is X-shaped and crosses through the fixed pulley 1 and is fixed to the damper element 2; the clamp 4 provides pre-tension for the cable, and the damper element can be adjusted to the appropriate position through the clamp 4; the lower part of the damper element 2 is fixed to the beam, and the upper part is connected to the cable 3, and the cross-layer displacement transmitted by the cable 3 can be horizontally moved through the fixed pulley 1, and then drive the damper element to dissipate energy.

[0120] Referring to Figure 7 A damping damper flexible cross-layer connection arrangement scheme for old buildings, for low and small-width-ratio old buildings, the damper element can be arranged at a low position outside the building, the cable is diagonally connected to the top of the building in an X shape, and the damper element can be arranged at the bottom according to the required damping force calculated according to the specific project, and a plurality of dampers can be connected in series at the bottom of the structure when a larger damping force is required.

[0121] Compared with the traditional way of repairing and adding reinforcing and damping dampers to the interior of the building, the scheme of adding flexible cross-layer connection dampers outside the building has the least damage to the old building, and the damper and cable system outside the building is convenient for maintenance and replacement, and does not affect the use of the interior structure of the building.

[0122] Embodiment 4

[0123] Referring to Figure 8 A self-resetting damper flexible connection cross-layer damping system is an amplification type damper flexible cross-layer connection arrangement scheme. The system comprises a fixed pulley 1, a damper element 2, a cable 3, a clamp 4, a lever 5, the fixed pulley 1 is fixed to the beam, and the fixed pulley can rotate; one end of the cable 3 is fixed to the column foot across the layers, and the cable 3 is X-shaped and crosses through the fixed pulley 1 and is connected to the power arm of the lever 5, one end of the damper element 2 is connected to the resistance arm of the lever 5, and the other end is fixed to the beam-column joint; the clamp 4 provides pre-tension for the cable, and the damper element can be adjusted to the appropriate position through the clamp 4; the cable 3 can transmit the cross-layer displacement to the lever 5 through the fixed pulley 1, and then transmit the displacement to the damper element 2 after being amplified by the lever again.

[0124] Referring to Figure 8 An amplification type damper flexible cross-layer connection arrangement scheme, for damping projects with large floor lateral stiffness and requiring large damping force, the cable system and the lever system can be combined to form an amplification type damper flexible cross-layer connection system, the power arm of the lever is connected to the cable system, and the resistance arm is connected to the damper element system, the interlayer displacement is further amplified by the lever, thereby increasing the output of the damper and reducing the number of damper arrangements.

[0125] This arrangement is mainly for the project with large lateral stiffness and small interlayer displacement, and the structure is provided with large damping force through the cooperation of the cable and lever system and the damper.

[0126] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cross-story vibration reduction system with a self-resetting damper and flexible connection, characterized in that: The system includes a fixed pulley (1), a damper element (2), a cable (3), and a clamp (4). The fixed pulley (1) is fixed to the beam. One end of the cable (3) is fixed across the column base and is X-shaped or V-shaped and fixed to the damper element (2) through the fixed pulley (1). The clamp (4) provides pretension to the cable (3) and adjusts the position of the damper element. The lower part of the damper element (2) is fixed to the beam, and the upper two ends are connected to the cable (3). The cross-layer displacement transmitted by the cable (3) moves horizontally through the fixed pulley (1) and drives the damper element to dissipate energy.

2. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 1, characterized in that: The cable (3) is flexible.

3. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 2, characterized in that: The lower part of the damper element (2) is fixed to the beam, and the two ends of the upper part are connected to the cable (3). It moves horizontally with the cable (3) and plays a role in consuming energy.

4. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 3, characterized in that: The damper element (2) is arranged on the upper part of the structure, and the cable (3) is fixed on the lower part of the structure.

5. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 3, characterized in that: The damper element (2) is arranged in the lower part of the structure, and the cable (3) is arranged in the lower part of the structure.

6. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 1, characterized in that: The clamp (4) provides pretension to the cable (3) and, within the elastic range, enables the damper element (2) to have a reset function.

7. The cross-layer vibration reduction system with self-resetting damper flexible connection according to claim 1, characterized in that: It also includes levers (5); The fixed pulley (1) is fixed to the beam and can rotate; one end of the cable (3) is fixed to the column base across the layer and is connected to the lever (5) power arm through the fixed pulley (1) in an X-shape; one end of the damper element (2) is connected to the resistance arm of the lever (5) and the other end is fixed to the beam-column node; the clamp (4) provides pretension to the cable and adjusts the position of the damper element through the clamp (4); the cable (3) can transmit the cross-layer displacement to the lever (5) through the fixed pulley (1), and then transmit it to the damper element (2) after being amplified by the lever.

8. A vibration reduction method for a cross-layer vibration reduction system based on a self-resetting damper with flexible connection as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Establish a finite element model of the building to be vibration-damped. With the dynamic response of the building under earthquake and wind vibration as the optimization objective, use the exponential distribution optimizer (EDO) to perform collaborative optimization of the damper (2) type, cable (3) cross-sectional area, cable (3) arrangement and pretension magnitude to determine the optimal configuration parameters of the cross-story vibration reduction system. S2. Fixed pulleys are installed at beam or beam-column joints in the upper or lower part of the structure. The fixed pulleys can rotate freely and are used to change the direction of force transmission of the cables. S3. Anchor one end of the flexible cable to the column base or corresponding node at the bottom of the structure, and cross several floors at the other end. Then, turn the cable through a fixed pulley and connect it to the damper element to form an X-shaped or V-shaped cable arrangement. S4. Apply pretension to the cable through clamps or anchors so that the damper element is in its initial working position under static conditions and has the ability to reset within the elastic deformation range. S5. When the structure generates inter-story displacement under external excitation, the cable converts the inter-story displacement into horizontal displacement through the fixed pulley, driving the damper element to generate relative motion. S6. The damper element dissipates energy during horizontal movement, reduces structural response, and achieves vibration reduction. S7. After the earthquake or wind-induced vibration ends, the damper components automatically reset by relying on the pretension and elastic recovery capacity of the cables, maintaining the system's continuous working capability.

9. The vibration reduction method according to claim 8, characterized in that, In step S1, the exponential distribution optimizer (EDO) is used to perform a collaborative optimization solution on the damper (2) type, cable (3) cross-sectional area, cable (3) arrangement and pretension magnitude to determine the optimal configuration parameters of the cross-story damping system, including the following steps: S101. Define the solution space, which is a mixed variable space, including discrete variables representing the type of damper (2), continuous variables representing the cross-sectional area of ​​the cable (3), discrete variables representing the arrangement of the cable (3), and continuous variables representing the magnitude of the pretension; randomly generate an initial population containing N candidate solutions in the solution space. If we set the dimension of the candidate solutions to D, then the population X can be represented as: ； S102. Substitute the parameter combination represented by each candidate solution in the population into the finite element model of the building to be vibration-damped for analysis, and extract the dynamic response results of the structure. S103. The dynamic response results of the building under earthquake and wind vibration are used as the fitness value of each candidate solution; S104. The standard exponential distribution optimizer EDO is improved as follows to adapt to the mixed variable space: For continuous variables, the update formula of the standard exponential distribution optimizer (EDO) can be applied directly. For discrete variables, their corresponding indices in the candidate categories are treated as integers, updated, rounded, and boundary-processed before being mapped back to the corresponding physical category. The update method of the Exponential Distribution Optimizer (EDO) is as follows: 1) Through guidance = Find the global optimal solution, where t is the number of iterations. These are the top three solutions with the best fitness values ​​in the t-th iteration; 2) During the development phase, the position of the i-th candidate solution is updated as follows: ； ； Where rand represents a random number in the range [0,1]. Indicates the exponential variance. This represents the current vector position of the i-th candidate solution in the t-th iteration; Let be the updated vector position of the i-th candidate solution in the t-th iteration; This means that after the t-th iteration update, the fitness values ​​of the two devices are compared, and the one with the better fitness value is selected as the new fitness value. ; 3) During the exploration phase, the position update formula for the i-th individual is as follows: ； in, This represents the average position of the population, i.e.: ； Other parameters are defined as follows: ； Where r1 and r2 represent the serial numbers of two different individuals randomly selected from the population; S105. Repeat steps S102 to S104 until the maximum number of iterations GEN is met, and output the parameter combination represented by the globally optimal individual as the optimal configuration parameter.

Images