Damaged building anti-seismic toughness improving and optimizing method and system based on damping device

Abstract

The invention discloses a damaged building anti-seismic toughness improvement optimization method and system based on a damping device, and belongs to the field of structural engineering and anti-seismic design. According to the method, a damaged structure model of a building is subjected to elastic-plastic time history analysis, the maximum inter-story sidesway angle of all floors is obtained, and the expected maximum inter-story sidesway angle control rate is determined according to the maximum sidesway angle; determining an initial design scheme of the damping device in the damage structure model according to the expected maximum interlayer lateral displacement angle control rate, and optimizing the initial design scheme in combination with an optimization design method to obtain an updated design scheme; the damping device design scheme and the building damage structure model are coupled to obtain a coupling damage structure model, numerical simulation is conducted on the coupling damage structure model, and the maximum interlayer lateral displacement angle control rate of the damage structure model is obtained; and updating the design scheme according to the maximum interlayer sidesway angle control rate to obtain an optimal design scheme of the damping device. According to the method, efficient arrangement and parameter optimization of the damping device are achieved, and the anti-seismic toughness improving effect of the building is enhanced.

Description

Technical Field

[0001] The present invention relates to the fields of structural engineering and seismic design, and in particular to a method and system for optimizing the seismic toughness improvement of damaged buildings based on a shock absorbing device. Background Art

[0002] Energy dissipation and shock absorption reinforcement is an important means of structural recovery and enhancement and seismic toughness improvement. Different from carbon fiber reinforcement method, outer steel method and other methods, it improves the seismic performance of the structure by adding energy dissipation and shock absorption devices at specific locations to change the dynamic characteristics of the structure, thereby achieving "recovery" and "enhancement". In the early engineering practice of energy dissipation and shock absorption reinforcement, shock absorption devices were usually evenly arranged on each floor. However, with the increase in the number of shock absorption devices and floors, the uniform arrangement will unreasonably increase the stiffness and damping of the structure, resulting in poor shock absorption effect. Therefore, a reasonable arrangement scheme can improve the stiffness while effectively reducing the seismic response. It becomes more necessary to determine the parameters, number and arrangement scheme of the shock absorption device through a certain optimization design method. At present, the research on the elastic-plastic analysis and optimization design of the shock absorber shock absorption structure mostly takes the intact structure as an uncontrolled structure, without considering the influence of structural damage, and there are problems such as unsatisfactory reinforcement effect, inaccurate analysis results, failure of optimization design, and increased maintenance cost. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a method and system for optimizing the seismic resilience improvement of damaged buildings based on shock-absorbing devices, which can achieve efficient arrangement and parameter optimization of shock-absorbing devices and enhance the seismic resilience improvement effect of buildings.

[0004] The present invention is achieved through the following technical solutions:

[0005] A method for optimizing the seismic toughness improvement of damaged buildings based on a shock absorbing device, characterized by comprising the following steps:

[0006] Step 1: Determine the degradation coefficient of mechanical properties of components according to the damage of components of the building structure;

[0007] Step 2: Reduce the mechanical properties of the building structure according to the degradation coefficient of the mechanical properties of the components to obtain a damaged structural model of the building structure;

[0008] Step 3: Perform elastic-plastic time history analysis based on the damaged structure model to obtain the maximum inter-story drift angle of each floor, and determine the expected maximum inter-story drift angle control rate V according to the maximum inter-story drift angle θ ;

[0009] Step 4: Determine the initial design scheme of the shock absorbing device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorbing device in combination with the optimization design method to obtain an updated design scheme of the shock absorbing device;

[0010] Step 5: Couple the design scheme of the shock absorbing device of the building structure with the building damaged structure model to obtain a coupled damaged structure model, and perform numerical simulation on the coupled damaged structure model to obtain the maximum inter-story drift angle control rate of the damaged structure model;

[0011] Step 6: Update the design scheme according to the maximum inter-story side drift angle control rate in step 5 to obtain the optimal design scheme of the shock absorbing device.

[0012] Preferably, in step 1, the damage level of the building structure is determined according to an earthquake damage structure modeling method, and the mechanical property degradation coefficient is determined according to the damage level.

[0013] Preferably, the mechanical property degradation coefficient of the component includes a strength reduction coefficient Stiffness reduction factor Hysteresis energy reduction factor The expression is as follows:

[0014]

[0015] Where: M sd is the yield strength of the damaged component, M y is the yield moment under load, λ j is the cycle degradation index, K d is the elastic stiffness, θ is the chord rotation angle, γ d is the hysteretic energy dissipation parameter of the damaged component.

[0016] Preferably, the method for establishing the building damage structure model is as follows:

[0017] According to the degradation coefficient of the mechanical properties of the components, the corresponding directional component parameters in the building structure model are folded accordingly to obtain the building damaged structure model.

[0018] Preferably, the building damage structure model is as follows:

[0019]

[0020] Where: f y,q is the reduced yield strength, K e,q is the reduced elastic stiffness, η q is the hysteresis energy dissipation parameter after reduction, f y is the original yield strength, K e is the original elastic stiffness, and η is the original hysteresis energy degradation index.

[0021] Preferably, the initial design scheme of the shock absorbing device in step 4 includes:

[0022] According to the desired maximum inter-layer side shift angle control rate V θ Preliminary determination of the total equivalent stiffness K of the shock absorber d , and then determine the total number of shock absorbing devices N d ; According to the total number of shock absorbers N d The optimization problem of the shock-absorbing devices on each floor is established based on the equivalent stiffness of the additional shock-absorbing devices on each floor. The desired maximum inter-story lateral displacement angle control rate is taken as the control target. The optimization problem is solved using the optimization layout algorithm to obtain the layout quantity, specifications and positions of the shock-absorbing devices on each floor, and then the initial design scheme is obtained.

[0023] Preferably, the updating method of the initial design scheme is as follows:

[0024] Establish the maximum and minimum values ​​of the objective function of the maximum inter-story displacement angle control rate, and update the objective function of the maximum inter-story displacement angle control rate by combining the maximum inter-story drift angle of the building structure, the maximum inter-story drift angle of the uncontrolled structure, and the maximum inter-story drift angle under the maximum control rate;

[0025] The initial design scheme of the seismic isolation device on each floor is optimized according to the joint objective function to obtain the design scheme of the seismic isolation device for the damaged structure model.

[0026] Preferably, the numerical simulation method is as follows:

[0027] Taking the inter-story drift of the coupled damaged structure model as the control target, the dynamic response, damage evolution and residual displacement of the damaged structure model are simulated and calculated to obtain the maximum inter-story drift angle control rate.

[0028] Preferably, the optimal design scheme for determining the shock absorbing device according to the maximum inter-story displacement angle control rate includes:

[0029] The maximum inter-story displacement angle control rate is compared with the threshold value. When the maximum inter-story displacement angle control rate is greater than the threshold value, step 4 is executed to optimize the design scheme of the shock absorbing device until the maximum inter-story displacement angle control rate is less than the threshold value, thereby obtaining the optimal design scheme of the shock absorbing device.

[0030] A system for optimizing the seismic toughness of damaged buildings based on a shock-absorbing device, comprising:

[0031] The damage coefficient module is used to determine the degradation coefficient of mechanical properties of components according to the damage of components of the building structure;

[0032] The damage model establishment module is used to reduce the mechanical properties of the building structure according to the degradation coefficient of the mechanical properties of the components to obtain a damaged structural model of the building structure;

[0033] The optimization target module is used to perform elastic-plastic time history analysis based on the damaged structure model to obtain the maximum side drift angle between each floor and determine the expected maximum side drift angle control rate V according to the maximum side drift angle. θ ;

[0034] The shock absorption design module is used to determine the initial design scheme of the shock absorption device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorption device in combination with the optimization design method to obtain an updated design scheme of the shock absorption device;

[0035] The optimization module is used to update the design scheme according to the maximum inter-story side drift angle control rate to obtain the optimal design scheme of the shock absorbing device.

[0036] Compared with the prior art, the present invention has the following beneficial technical effects:

[0037] The present invention discloses an optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device. The method first establishes a damaged structural model of a building according to the degradation coefficient of the mechanical properties of the components, and fully considers the performance changes of the structure caused by damage. This is in sharp contrast to the traditional uncontrolled structural analysis method based on the intact structure, making the analysis results closer to reality and the reinforcement effect more ideal. Secondly, by combining the inter-story displacement control rate and the maximum acceleration of the floor of the damaged building to establish a joint objective function, the method can more comprehensively evaluate and optimize the seismic performance of the structure. This multi-dimensional consideration helps to ensure the overall stability and safety of the structure under earthquake while improving the structural toughness. In addition, the design scheme of the shock-absorbing device is coupled with the damaged structural model of the building to form a coupled damaged structural model, and numerical simulation is performed. This step enables the actual effect of the shock-absorbing device to be accurately evaluated in a simulated environment, thereby avoiding the trial and error and waste that may exist in the traditional design method. Through numerical simulation, the performance of the shock-absorbing device can be more effectively predicted and optimized. Finally, according to the maximum inter-story displacement angle and the joint objective function, the method can quantitatively evaluate the effects of different shock-absorbing device design schemes and determine the optimal design scheme accordingly. This data-based decision-making method improves the scientificity and accuracy of the design and helps to achieve efficient layout and parameter optimization of the shock absorber.

[0038] The present application also proposes a system for optimizing the seismic resilience improvement of damaged buildings based on shock-absorbing devices, an electronic device and a computer storage medium, which possess all the advantages of the above-mentioned method for optimizing the seismic resilience improvement of damaged buildings based on shock-absorbing devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 The present invention is a flow chart of the method for optimizing the seismic toughness improvement of buildings.

[0041] Figure 2 It is a building structure elevation view of Example 1 of the present invention;

[0042] Figure 3 Reinforcement of the cross section of the building component according to Embodiment 1 of the present invention; DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0045] A method for optimizing the seismic toughness improvement of damaged buildings based on a shock-absorbing device comprises the following steps:

[0046] Step 1: Determine the degradation coefficient of the mechanical properties of the component according to the damage condition of the component.

[0047] The degradation coefficient of mechanical properties of components includes the strength reduction factor Stiffness reduction factor Hysteresis energy reduction factor The expression is as follows:

[0048]

[0049] Where: M sd is the yield strength of the damaged component, M y is the yield moment under monotonic loading, λ j is the cycle degradation index, K d is the elastic stiffness, θ is the chord rotation angle, γd is the hysteresis energy dissipation parameter of the damaged component;

[0050] Step 2: Reduce the mechanical properties of the intact structural model according to the degradation coefficient of the mechanical properties of the component to obtain a damaged structural model. Specifically, reduce the corresponding directional component parameters according to the degradation coefficient of the mechanical properties of the component to obtain the damaged structural model;

[0051]

[0052] Where: f y,q is the reduced yield strength, K e,q is the reduced elastic stiffness, η q is the hysteresis energy dissipation parameter after reduction, f y is the original yield strength, K e is the original elastic stiffness, η is the original hysteresis energy degradation index;

[0053] Step 3: Perform elastic-plastic time history analysis on the damaged structure model to obtain the maximum side drift angle between each floor, and determine the expected maximum side drift angle control rate V according to the maximum side drift angle. θ ;

[0054] Maximum inter-layer side shift angle control rate V θ The definition is as follows:

[0055]

[0056] Where: θ 0,max ,θ max They are the maximum inter-story lateral displacement angles of the damaged structure under earthquake action before and after the shock absorber is added.

[0057] Step 4: Determine the initial design scheme of the shock absorbing device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorbing device in combination with the optimization design method to obtain an updated design scheme of the shock absorbing device; the specific method is as follows:

[0058] S4.1. Determine the V of the damaged structure model according to the parameter optimization algorithm in the optimization design method θ -K d curve, and according to the desired maximum inter-layer side shift angle control rate V θ Preliminary determination of the total equivalent stiffness K of the shock absorber d , and then determine the total number of shock absorbing devices N d ;

[0059] Taking the expected maximum inter-story side drift angle control rate as the control target, the total equivalent stiffness K of the shock absorbing device is optimized by using the parameter optimization algorithm. dOptimize and solve to obtain the optimal distribution of shock-absorbing devices between floors, and then determine the equivalent stiffness k of the additional shock-absorbing devices on each floor. d (1) k d (2)…k d (n).

[0060] When the total equivalent stiffness of the damper is K d When , the mathematical model of the optimization problem can be expressed as:

[0061]

[0062] Where: θ1, θ2…θ n are the maximum inter-story drift angles of the 1st to nth floors of the damaged structure under earthquake action.

[0063] S4.2, according to the total number of shock absorbing devices N d The optimization problem of the shock-absorbing devices on each floor is established based on the equivalent stiffness of the additional shock-absorbing devices on each floor. The desired maximum inter-story lateral displacement angle control rate is taken as the control target. The optimization problem is solved using the optimization layout algorithm to obtain the layout quantity, specifications and positions of the shock-absorbing devices on each floor.

[0064] The optimization algorithm uses a genetic algorithm method. According to the total number of shock absorbers N obtained by the parameter optimization algorithm d And the equivalent stiffness of the shock absorbers added to each layer, the number and position of shock absorbers of the same specifications arranged on each layer are obtained.

[0065] Taking the desired maximum inter-story drift angle control rate as the control target, the mathematical model of the optimization problem of arranging a fixed number of shock absorbers of the same specifications into the damaged structure can be expressed as:

[0066]

[0067] Where: θ 0,max ,θ max are the maximum inter-story drift angles of the damaged structure before and after the shock absorber is added; X is the shock absorber layout scheme, x1, x2…x n N are the number of shock absorbers arranged on the 1st, 2nd, ...nth layers respectively; d is the total number of shock absorbers, N 0i The number of locations where shock absorbers can be placed on each floor.

[0068] S4.3. Establish the maximum and minimum values ​​of the objective function of the maximum inter-story displacement angle control rate, and update the objective function of the maximum inter-story displacement angle control rate by combining the maximum inter-story drift angle of the building structure, the maximum inter-story drift angle of the uncontrolled structure, and the maximum inter-story drift angle under the maximum control rate;

[0069] The maximum acceleration of the floor and the manufacturing cost of the shock absorbing device are introduced into the objective function of updating the maximum inter-story displacement angle control rate to obtain a joint objective function.

[0070] According to the joint objective function, the arrangement quantity, specification and position of the shock-absorbing devices on each floor are optimized to obtain the design scheme of the shock-absorbing devices for the damaged structure model.

[0071] The objective function takes into account the manufacturing cost

[0072]

[0073] Where: N0 is the total number of locations where shock absorbers can be arranged in the damaged structure, N d / N0 is used as a sub-item to represent the cost; α and β are weighting coefficients, -

[0074] Considering the maximum inter-story drift angle, the objective function can be expressed as:

[0075]

[0076] Where: C ult,θ is the maximum control rate that can be achieved at the maximum inter-layer sideslip angle.

[0077] The minimum value form is expressed as:

[0078]

[0079] The maximum inter-layer side shift angle control rate C θ , maximum control rate C ult,θ The maximum inter-story drift angle θ of the structure max 、Maximum inter-layer drift angle θ of uncontrolled structure 0,max , the maximum interlayer side shift angle θ under the maximum control rate ult,max It can be expressed as:

[0080]

[0081] Then add the sub-item to consider the maximum floor acceleration:

[0082]

[0083] This is the improved objective function based on the control rate, where the sub-term (θ max -θ ult,max )- / (θ 0,max -θ ult,max ) and (a max -a ult,max ) / (a 0,max -a ult,max) are all between 0 and 1. When the shock absorber arrangement scheme has no control effect on a certain indicator, the sub-item value corresponding to the indicator is 1; when the shock absorber arrangement scheme achieves the optimal control effect that can be achieved for a certain indicator, the sub-item value corresponding to the indicator is 0. Therefore, the sub-items representing the control effects of different indicators are no longer very different in value range. At this time, adjusting the weight coefficients α and β can effectively implement the trade-off between safety and comfort in the optimization process.

[0084] The weight coefficients here are as follows: ①α-=0.7, β-=0.3, that is, safety is considered first and comfort is secondary; ②α=β=0.5, that is, safety and comfort are taken into account; ③α=0.3, β=0.7, that is, comfort is considered first and safety is secondary.

[0085] The final design parameters, number and layout of the shock-absorbing devices were obtained on the MATLAB-Open-SEES, Python--Open-SEES, MATLAB-Abaqus and Python-Abaqus software joint platforms.

[0086] Step 5: Couple the shock-absorbing device design with the damaged structure model to obtain a coupled damaged structure model and perform multi-level simulation to obtain the maximum inter-layer drift angle control rate of the damaged structure model.

[0087] Taking the inter-story drift as the control target, the dynamic response, damage evolution and residual displacement of the damaged structure model are simulated and calculated to obtain the maximum inter-story drift angle control rate.

[0088] Step 6: Compare the maximum inter-layer side drift angle control rate with the expected maximum inter-layer side drift angle control rate. When the maximum inter-layer side drift angle control rate is greater than the expected maximum inter-layer side drift angle control rate, execute step 4 to optimize the design scheme of the shock absorbing device until the maximum inter-layer displacement angle control rate is less than the threshold value, thereby obtaining the optimal design scheme of the shock absorbing device.

[0089] The maximum inter-story displacement angle control rate is compared with the expected maximum inter-story lateral displacement angle control rate to determine whether it is less than the target limit; if not, the design parameters, number and layout of the shock-absorbing device are re-determined and the execution is repeated until the maximum inter-story displacement angle control rate is less than the expected maximum inter-story lateral displacement angle control rate, thereby obtaining the optimal design scheme of the shock-absorbing device.

[0090] The present invention is based on a method for optimizing the seismic toughness of damaged buildings based on shock-absorbing devices. The existing damaged structure is taken as an uncontrolled structure, the influence of structural damage is considered, and the elastic-plastic analysis and optimization design of the damaged structure's shock-absorbing and recovery reinforcement structure are carried out. This is closer to the actual situation faced by the energy dissipation and shock-absorbing reinforcement of the existing damaged structure. By optimizing the arrangement and parameters of the shock-absorbing device, this method can significantly improve the seismic toughness of the damaged building and reduce the damage to the structure caused by the earthquake. At the same time, due to the effective operation of the shock-absorbing device, the maintenance cost of the structure in daily use can be reduced, and the service life of the structure can be extended. This method is not only suitable for specific types of buildings or shock-absorbing devices, but has a wide range of applicability. By adjusting the model parameters and the objective function, it can adapt to building structures of different types and different degrees of damage and different types of shock-absorbing devices, providing a flexible and effective solution for engineering practice.

[0091] In summary, the optimization method for improving the seismic resilience of damaged buildings based on shock-absorbing devices significantly improves the scientificity and accuracy of the reinforcement effect, reduces maintenance costs, enhances the seismic resilience of the structure, and provides strong technical support for engineering practice by considering structural damage, establishing a joint objective function, conducting numerical simulation and coupling analysis, and accurately determining the optimal design scheme.

[0092] Example 1

[0093] Take a nine-story reinforced concrete frame, earthquake damage, and shock absorbers as an example. According to the above process, the optimization design of the damaged structure, shock absorption, recovery and reinforcement structure is carried out. Figure 2 As shown, the cross-section reinforcement of the member is as follows Figure 3 As shown in the figure, for the convenience of description, the intact structure model is denoted as 9F in the following text. Assume the following two types of damage: ① All floors 1 to 9 are damaged; ② Floors 3 to 6 and 9, which have large earthquake deformation, are damaged. The above two earthquake-damaged structure models are denoted as 9F1 and 9F2 respectively.

[0094] Step 1: For the intact nine-story reinforced concrete frame structure, determine its damage level based on the earthquake damage structure modeling method of apparent damage in Table 1 and determine the mechanical performance degradation coefficient of the damaged building structure

[0095] Table 1 - Damage level classification

[0096]

[0097] According to the modified resilience model expression, the strength degradation index corresponding to the critical point of each damage level in Table 2 is calculated. Stiffness degradation index Hysteresis Energy Degradation Index The calculation results are listed in Table 2.

[0098] Table 2 Damage critical point performance degradation index

[0099]

[0100] Step 2: First, look up Table 1 to know that the aforementioned apparent damage corresponds to the "medium damage" level. For safety reasons, the damage index is taken according to the upper critical point of the damage level, that is, D = 0.4; then look up Table 2 to know the corresponding strength reduction factor is 0.66, the stiffness reduction factor is 0.42, the hysteresis energy reduction coefficient When the directional material parameters in the intact structure model are reduced to 0.58, the earthquake damaged structure model can be obtained. The reduction results of the directional material parameters of 9F1 and 9F2 are shown in Tables 1 and 2.

[0101] Table 3 - Material parameters of earthquake damaged structure model 9FDM1

[0102]

[0103]

[0104] Table 4 - Material parameters of earthquake damaged structure model 9FDM2

[0105]

[0106] Step 3: After modeling, 9F1 and 9F2 were subjected to elastic-plastic time history analysis, and the maximum inter-story drift angles of each floor are listed in Table 5. If the maximum inter-story drift angle of earthquake-damaged buildings is to be controlled not to exceed the upper limit of "moderate damage" in the Anti-seismic Code, i.e., 1 / 125, the expected maximum inter-story drift angle control rates for 9F1 and 9F2 are 38.5% and 49.2%, respectively.

[0107] Table 5 Maximum side displacement angle between layers of earthquake damaged structures (unit: 10-3rad)

[0108]

[0109] Step 4: When the total equivalent stiffness K d When different values ​​are taken, the shock absorber parameter optimization algorithm is used for the earthquake damaged structure models 9F1 and 9F2 respectively. The maximum inter-story drift angle control rate V corresponding to the optimization results is θ The earthquake damage structure V is shown in Table 6. θ -K d Curve. The total equivalent stiffness K of the damper of 9F1 and 9F2 d According to their respective expected maximum inter-layer side shift angle control rate V θBy increasing the value by about 6%, the total equivalent stiffness K of the shock absorber required for strengthening 9F1 is obtained. d is 78429 kN / m, which can be taken as 78500 kN / m; the total equivalent stiffness K of the shock-absorbing device required for strengthening 9F2 is obtained d It is 66407kN / m, and can be taken as 66500kN / m.

[0110] Table 6- Maximum side slip angle control rate under different total equivalent stiffness

[0111]

[0112] Total number of dampers N d The value range of is set to 7-15, and the damper optimization layout algorithm is used to solve the optimal layout scheme. The optimal layout schemes of 9F1 and 9F2 are listed in Table 7 and Table 8. After comparison, the optimal design scheme for improving the seismic toughness of damaged buildings of 9F1 and 9F2 is determined as follows:

[0113] For 9F1, when only the inter-story lateral displacement control effect is considered, 12 equivalent stiffnesses of 5.92×10 3 kN / m of shock-absorbing devices are arranged on the 1st, 2nd, 4th, 6th, 8th and 9th floors, and 2 on the 3rd, 5th and 7th floors. If the objective function takes the cost into consideration, when α=0.8, -β=0.2, the optimal design scheme is consistent with the design scheme that only considers the inter-story lateral displacement control effect. When α=0.7, -β=0.3, 7 equivalent stiffness of 11×10 3 kN / m shock-absorbing devices are arranged one on each of the 2nd to 7th and 9th floors.

[0114] For 9F2, when only the inter-story drift control effect is considered, 11 equivalent stiffnesses of 6.6×10 3 kN / m of shock-absorbing devices are arranged on the 2nd, 4th, 6th, 8th and 9th floors, and 2 on the 1st, 3rd and 5th floors. If the cost is comprehensively considered according to the objective function, when α=0.8, -β=0.2, the optimal design scheme is consistent with the design scheme that only considers the inter-story lateral displacement control effect. When α=0.7, -β=0.3, 7 equivalent stiffness of 9.43×10 3 kN / m shock-absorbing devices are arranged one each on the 4th to 7th and 9th floors, and two on the 3rd floor.

[0115] Step 5: A coupled damaged structure model is obtained by coupling the design scheme of the shock absorbing device with the damaged structure model of the building, and numerical simulation is performed on the coupled damaged structure model to obtain the maximum inter-story drift angle control rate of the damaged structure model;

[0116] Step 6: Determine the optimal design scheme of the shock absorbing device based on the comparison of the maximum inter-layer side drift angle control rate.

[0117] Table 7 Comparison of 9FDM1 optimized layout schemes

[0118]

[0119]

[0120] Table 8-9 Comparison of FDM2 optimized layout solutions

[0121]

[0122] Based on the above-mentioned method for optimizing the seismic toughness improvement of damaged buildings based on shock-absorbing devices, the present application also proposes an optimization system for optimizing the seismic toughness improvement of damaged buildings based on shock-absorbing devices, which may include:

[0123] The damage coefficient module is used to determine the degradation coefficient of mechanical properties of components according to the damage of components of the building structure;

[0124] The damage model establishment module is used to reduce the mechanical properties of the building structure according to the degradation coefficient of the mechanical properties of the components to obtain a damaged structural model of the building structure;

[0125] The optimization target module is used to perform elastic-plastic time history analysis based on the damaged structure model to obtain the maximum side drift angle between each floor and determine the expected maximum side drift angle control rate V according to the maximum side drift angle. θ ;

[0126] The shock absorption design module is used to determine the initial design scheme of the shock absorption device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorption device in combination with the optimization design method to obtain an updated design scheme of the shock absorption device;

[0127] The optimization module is used to update the design scheme according to the maximum inter-story side drift angle control rate to obtain the optimal design scheme of the shock absorbing device.

[0128] It should be noted that in several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of each module is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules can be combined or integrated into another device, or some features can be ignored or not executed. The module described as a separate component may or may not be physically separated. The component displayed as a module may be a physical unit or multiple physical units, that is, it may be located in one place, or it may be distributed in multiple different places. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0129] In addition, each module in each embodiment of the present invention may be integrated into a processing unit, each module may exist physically separately, or two or more modules may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0130] An electronic device provided in an embodiment of the present application includes a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the steps of the method for optimizing the seismic resilience improvement of a damaged building based on a shock-absorbing device as described in any of the above embodiments are implemented.

[0131] Another electronic device provided in the embodiment of the present application may also include: an input port connected to the processor, used to transmit multimodal data collected by an external acquisition device to the processor; and a display unit connected to the processor, used to display the processing results of the processor to the outside world; a communication module connected to the processor, used to realize communication between the electronic device and the outside world. The display unit can be a display panel, a laser scanning display, etc.; the communication mode adopted by the communication module includes but is not limited to mobile high-definition link technology (HML), universal serial bus (USB), high-definition multimedia interface (HDMI), wireless connection (including wireless fidelity technology (WiFi), Bluetooth communication technology, low-power Bluetooth communication technology, and communication technology based on IEEE802-.11s).

[0132] An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of the method for optimizing the seismic resilience improvement of damaged buildings based on a shock-absorbing device as described in any of the above embodiments are implemented.

[0133] For the description of the relevant parts of the system for improving the seismic resilience of damaged buildings based on the shock-absorbing device, the electronic device, and the computer-readable storage medium provided in the embodiments of the present application, please refer to the detailed description of the corresponding parts of the method for improving the seismic resilience of damaged buildings based on the shock-absorbing device provided in the embodiments of the present application, which will not be repeated here. In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive elaboration.

[0134] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for optimizing the seismic toughness of damaged buildings based on a shock-absorbing device, characterized in that: The following steps are involved: Step 1: Determine the degradation coefficient of mechanical properties of components according to the damage of components of the building structure; Step 2: Reduce the mechanical properties of the building structure according to the degradation coefficient of the mechanical properties of the components to obtain a damaged structural model of the building structure; Step 3: Perform elastic-plastic time history analysis based on the damaged structure model to obtain the maximum inter-story drift angle of each floor, and determine the expected maximum inter-story drift angle control rate V according to the maximum inter-story drift angle. θ ; Step 4: Determine the initial design scheme of the shock absorbing device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorbing device in combination with the optimization design method to obtain an updated design scheme of the shock absorbing device; Step 5: Couple the design scheme of the shock absorbing device of the building structure with the building damaged structure model to obtain a coupled damaged structure model, and perform numerical simulation on the coupled damaged structure model to obtain the maximum inter-story drift angle control rate of the damaged structure model; Step 6: Update the design scheme according to the maximum inter-story side drift angle control rate in step 5 to obtain the optimal design scheme of the shock absorbing device.

2. According to claim 1, a method for optimizing the seismic toughness improvement of damaged buildings based on a shock absorbing device is characterized in that: In step 1, the damage level of the building structure is determined according to the earthquake damage structure modeling method, and the mechanical property degradation coefficient is determined according to the damage level.

3. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 2 is characterized in that: The mechanical property degradation coefficient of the component includes the strength reduction coefficient Stiffness reduction factor Hysteresis energy reduction factor The expression is as follows: Where: M sd is the yield strength of the damaged component, M y is the yield moment under load, λ j is the cycle degradation index, K d is the elastic stiffness, θ is the chord rotation angle, γ d is the hysteretic energy dissipation parameter of the damaged component.

4. According to claim 1, a method for optimizing the seismic toughness improvement of damaged buildings based on a shock absorbing device is characterized in that: The method for establishing the building damage structure model is as follows: According to the degradation coefficient of the mechanical properties of the components, the corresponding directional component parameters in the building structure model are folded accordingly to obtain the building damaged structure model.

5. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 4 is characterized in that: The building damage structure model is as follows: Where: f y,q is the reduced yield strength, K e,q is the reduced elastic stiffness, η q is the hysteresis energy dissipation parameter after reduction, f y is the original yield strength, K e is the original elastic stiffness, and η is the original hysteresis energy degradation index.

6. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 1 is characterized in that: The initial design scheme of the shock absorbing device in step 4 includes: According to the desired maximum inter-layer side shift angle control rate V θ Preliminary determination of the total equivalent stiffness K of the shock absorber d , and then determine the total number of shock absorbing devices N d ; According to the total number of shock absorbers N d The optimization problem of the shock-absorbing devices on each floor is established based on the equivalent stiffness of the additional shock-absorbing devices on each floor. The desired maximum inter-story lateral displacement angle control rate is taken as the control target. The optimization problem is solved using the optimization layout algorithm to obtain the layout quantity, specifications and positions of the shock-absorbing devices on each floor, and then the initial design scheme is obtained.

7. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 6 is characterized in that: The updating method of the initial design scheme is as follows: Establish the maximum and minimum values ​​of the objective function of the maximum inter-story displacement angle control rate, and update the objective function of the maximum inter-story displacement angle control rate by combining the maximum inter-story drift angle of the building structure, the maximum inter-story drift angle of the uncontrolled structure, and the maximum inter-story drift angle under the maximum control rate; The initial design scheme of the seismic isolation device on each floor is optimized according to the joint objective function to obtain the design scheme of the seismic isolation device for the damaged structure model.

8. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 1 is characterized in that: The method of numerical simulation is as follows: Taking the inter-story drift of the coupled damaged structure model as the control target, the dynamic response, damage evolution and residual displacement of the damaged structure model are simulated and calculated to obtain the maximum inter-story drift angle control rate.

9. The optimization method for improving the seismic toughness of damaged buildings based on a shock-absorbing device according to claim 1 is characterized in that: The optimal design scheme for determining the shock absorbing device according to the maximum inter-story displacement angle control rate includes: The maximum inter-story displacement angle control rate is compared with the threshold value. When the maximum inter-story displacement angle control rate is greater than the threshold value, step 4 is executed to optimize the design scheme of the shock absorbing device until the maximum inter-story displacement angle control rate is less than the threshold value, thereby obtaining the optimal design scheme of the shock absorbing device.

10. A system for optimizing the seismic toughness of damaged buildings based on a shock-absorbing device, characterized in that: include: The damage coefficient module is used to determine the degradation coefficient of mechanical properties of components according to the damage of components of the building structure; The damage model establishment module is used to reduce the mechanical properties of the building structure according to the degradation coefficient of the mechanical properties of the components to obtain a damaged structural model of the building structure; The optimization target module is used to perform elastic-plastic time history analysis based on the damaged structure model to obtain the maximum side drift angle between each floor and determine the expected maximum side drift angle control rate V according to the maximum side drift angle. θ ; The shock absorption design module is used to determine the initial design scheme of the shock absorption device in the damaged structure model according to the expected maximum inter-story drift angle control rate, and optimize the initial design scheme of the shock absorption device in combination with the optimization design method to obtain an updated design scheme of the shock absorption device; The optimization module is used to update the design scheme according to the maximum inter-story side drift angle control rate to obtain the optimal design scheme of the shock absorbing device.

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