Building anti-seismic performance evaluation method, device and equipment and storage medium

Abstract

The invention discloses a building anti-seismic performance evaluation method, device and equipment and a storage medium, and relates to the technical field of seismic engineering, and the building anti-seismic performance evaluation method comprises the steps: obtaining the observation acceleration of a target building, and carrying out the zero padding of the observation acceleration to obtain a reference acceleration; expanding the reference acceleration series according to a preset acceleration characteristic function to obtain an expansion coefficient; obtaining a target speed time history and a target displacement time history according to a preset displacement characteristic function, a preset speed characteristic function and the expansion coefficient; evaluating the anti-seismic performance of the target building according to the target speed time history and the target displacement time history; according to the method, stable reference acceleration is generated by observing acceleration to obtain accurate target speed time history and target displacement time history, drift errors in a traditional numerical integration process are avoided, the physical authenticity and accuracy of the speed and displacement time history are ensured, a reliable basis is provided for aseismic design based on performance, and the method is suitable for large-scale popularization and application. And the anti-seismic performance of the target building can be evaluated more accurately.

Description

Technical Field

[0001] The present application relates to the field of earthquake engineering technology, and in particular to a method, device, equipment and storage medium for evaluating the seismic performance of a building. Background Art

[0002] In performance-based seismic design and analysis, the displacement history of a structure under dynamic action plays a vital role. It is not only used to evaluate the response behavior of a building in extreme events such as earthquakes, but also provides engineers with key information to ensure the safety and functionality of the building. However, in practical applications, directly measuring the displacement history of a building is an extremely difficult and tedious task. Traditional displacement measurement methods usually require the installation of specialized displacement sensors, and these sensors must be precisely positioned at key locations of the structure, which is particularly complex in existing buildings.

[0003] The displacement time history of a structure under dynamic action plays an important role in conducting performance-based seismic design and analysis. Since acceleration time histories can be easily measured using accelerometers, numerical integration is often used to determine velocity and displacement from the measured acceleration. However, numerical integration often leads to unrealistic and large drifts in velocity and displacement, and the causes of velocity and displacement drift have been studied for a long time. Previous studies have shown that instrument-induced offsets in acceleration records can cause drift. Therefore, traditional numerical integration of acceleration data often introduces unrealistic drift components to the desired velocity and displacement time histories, resulting in inaccurate assessment of the seismic performance of buildings through velocity and displacement time histories.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a method, device, equipment and storage medium for evaluating the seismic performance of a building, aiming to solve the technical problem that the traditional numerical integration of acceleration data usually introduces unrealistic drift components into the required velocity time history and displacement time history, resulting in inaccurate evaluation of the seismic performance of the building through the velocity time history and displacement time history.

[0006] To achieve the above objectives, the present application proposes a method for evaluating the seismic performance of a building, the method comprising:

[0007] Obtaining the observed acceleration of the target building, and performing zero padding processing on the observed acceleration to obtain a reference acceleration;

[0008] Performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient;

[0009] Obtaining a target velocity time history and a target displacement time history according to a preset displacement characteristic function, a preset velocity characteristic function and the expansion coefficient;

[0010] The seismic performance of the target building is evaluated according to the target velocity time history and the target displacement time history.

[0011] In one embodiment, the obtaining of the observed acceleration of the target building and performing zero padding on the observed acceleration to obtain the reference acceleration includes:

[0012] Get the observed acceleration of the target building;

[0013] When the front end or / and the rear end of the observed acceleration are not zero, adding zero to the front end or / and the rear end of the observed acceleration to obtain a reference acceleration;

[0014] When the front end and the rear end of the observed acceleration are zero, the observed acceleration is used as the reference acceleration.

[0015] In one embodiment, before performing series expansion on the reference acceleration according to the preset acceleration characteristic function to obtain the expansion coefficient, the method further includes:

[0016] Obtain the sixth-order vibration ordinary differential function and stationary conditions;

[0017] Obtaining an initial displacement characteristic function, an initial velocity characteristic function and an initial acceleration characteristic function according to the sixth-order vibration ordinary differential function;

[0018] A preset characteristic function is obtained according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function.

[0019] In one embodiment, obtaining the preset characteristic function according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function comprises:

[0020] Constructing a coefficient matrix according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function, and the initial acceleration characteristic function;

[0021] Analyzing the coefficient matrix to obtain eigenvalues;

[0022] A preset characteristic function is obtained according to the characteristic value, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, and the preset characteristic function includes a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function.

[0023] In one embodiment, performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient includes:

[0024] Obtaining a total number of discrete time points according to the reference acceleration;

[0025] Constructing an expansion function according to the total number of discrete time points and the preset acceleration characteristic function;

[0026] The expansion function is integrated and deformed to obtain a coefficient function, and the coefficient function is analyzed to obtain expansion coefficients.

[0027] In one embodiment, obtaining the target speed time course and the target displacement time course according to the preset displacement characteristic function, the preset speed characteristic function and the expansion coefficient includes:

[0028] Obtaining a target displacement time history by cumulatively summing the preset displacement characteristic function and the expansion coefficient;

[0029] The target speed time course is obtained by cumulatively summing the preset speed characteristic function and the expansion coefficient.

[0030] In one embodiment, the performing seismic performance evaluation on the target building according to the target velocity time history and the target displacement time history includes:

[0031] Obtaining the inter-story displacement angle and the structural displacement of the target building according to the target velocity time history and the target displacement time history;

[0032] Comparing the inter-story displacement angle and the structural displacement according to a preset displacement angle threshold and a structural displacement threshold to obtain a comparison result;

[0033] The seismic performance is evaluated according to the comparison result.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a building seismic performance evaluation device, the building seismic performance evaluation device comprising:

[0035] An acquisition module is used to acquire the observed acceleration of the target building and to perform zero padding on the observed acceleration to obtain a reference acceleration;

[0036] A parameter calculation module, used for performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient;

[0037] The parameter calculation module is further used to obtain the target speed time history and the target displacement time history according to the preset displacement characteristic function, the preset speed characteristic function and the expansion coefficient;

[0038] An evaluation module is used to evaluate the seismic performance of the target building according to the target velocity time history and the target displacement time history.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a building seismic performance evaluation device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the building seismic performance evaluation method as described above.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the building seismic performance evaluation method as described above are implemented.

[0041] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the building seismic performance evaluation method as described above.

[0042] One or more technical solutions proposed in this application have at least the following technical effects: generating a stable reference acceleration by observing acceleration, and using a preset acceleration characteristic function to perform a series expansion on the reference acceleration, and accurately calculating the expansion coefficient; then accurately deriving the target velocity time series and target displacement time series based on the preset displacement and velocity characteristic functions combined with the above expansion coefficients. It avoids the common drift error problem in the traditional numerical integration process, ensures the physical authenticity and accuracy of the obtained velocity and displacement time series, and provides a reliable basis for performance-based seismic design, so that the seismic performance of the target building under earthquake action can be more accurately evaluated, effectively supporting seismic design optimization and structural safety evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 A schematic diagram of a process flow provided for Example 1 of the method for evaluating the seismic performance of a building of the present application;

[0046] Figure 2A logical structure diagram of building seismic performance evaluation provided in Example 1 of the building seismic performance evaluation method of the present application;

[0047] Figure 3 A schematic diagram of the acceleration time history after zero filling provided in Example 1 of the building seismic performance evaluation method of the present application;

[0048] Figure 4 A schematic diagram of a preset characteristic function provided in Example 1 of the building seismic performance evaluation method of the present application;

[0049] Figure 5 A schematic diagram of velocity time history and displacement time history provided in Example 1 of the building seismic performance evaluation method of the present application;

[0050] Figure 6 A schematic diagram of a flow chart provided for Example 2 of the building seismic performance assessment method of the present application;

[0051] Figure 7 A schematic diagram of a preset acceleration characteristic function, a preset velocity characteristic function and a preset displacement characteristic function provided in Example 2 of the building seismic performance evaluation method of the present application;

[0052] Figure 8 This is a schematic diagram of the module structure of the building seismic performance evaluation device according to an embodiment of the present application;

[0053] Fig. 9 Schematic diagram of the equipment structure of the hardware operating environment involved in the building seismic performance evaluation method in the embodiment of the present application. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0055] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0056] The main solution of the embodiment of the present application is: obtain the observed acceleration of the target building, fill the observed acceleration with zero to obtain the reference acceleration; expand the reference acceleration series according to the preset acceleration characteristic function to obtain the expansion coefficient; obtain the target velocity time series and the target displacement time series according to the preset displacement characteristic function, the preset velocity characteristic function and the expansion coefficient; evaluate the seismic performance of the target building according to the target velocity time series and the target displacement time series.

[0057] In this embodiment, for ease of description, the following description is made by taking the identification of building seismic performance assessment equipment as the execution subject.

[0058] Due to existing technologies, the displacement history of structures under dynamic action plays a vital role in performance-based seismic design and analysis. It is not only used to evaluate the response behavior of buildings in extreme events such as earthquakes, but also provides engineers with key information to ensure the safety and functionality of buildings. However, in practical applications, directly measuring the displacement history of buildings is an extremely difficult and tedious task. Traditional displacement measurement methods usually require the installation of specialized displacement sensors, and these sensors must be precisely positioned at key locations of the structure, which is particularly complex in existing buildings.

[0059] The displacement time history of a structure under dynamic action plays an important role in conducting performance-based seismic design and analysis. Since acceleration time histories can be easily measured using accelerometers, numerical integration is often used to determine velocity and displacement from the measured acceleration. However, numerical integration often leads to unrealistic and large drifts in velocity and displacement, and the causes of velocity and displacement drift have been studied for a long time. Previous studies have shown that instrument-induced offsets in acceleration records can cause drift. Therefore, traditional numerical integration of acceleration data often introduces unrealistic drift components to the desired velocity and displacement time histories, resulting in inaccurate assessment of the seismic performance of buildings through velocity and displacement time histories.

[0060] The present application provides a solution, which generates a stable reference acceleration by observing acceleration to obtain accurate target velocity time history and target displacement time history, avoiding the drift error in the traditional numerical integration process, ensuring the physical authenticity and accuracy of the velocity and displacement time history, providing a reliable basis for performance-based seismic design, and being able to more accurately evaluate the seismic performance of the target building.

[0061] It can be seen from the above embodiments that the present application discloses a method for evaluating the seismic performance of a building, including: obtaining the observed acceleration of the target building, and performing zero-filling processing on the observed acceleration to obtain a reference acceleration; expanding the reference acceleration series according to a preset acceleration characteristic function to obtain an expansion coefficient; obtaining a target velocity time series and a target displacement time series according to a preset displacement characteristic function, a preset velocity characteristic function and the expansion coefficient; evaluating the seismic performance of the target building according to the target velocity time series and the target displacement time series; the method generates a stable reference acceleration through the observed acceleration to obtain an accurate target velocity time series and a target displacement time series, thereby avoiding drift errors in the traditional numerical integration process, ensuring the physical authenticity and accuracy of the velocity and displacement time series, providing a reliable basis for performance-based seismic design, and being able to more accurately evaluate the seismic performance of the target building.

[0062] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a building seismic performance evaluation device, etc. The following takes the building seismic performance evaluation device as an example to illustrate this embodiment and the following embodiments.

[0063] Based on this, the present application embodiment provides a method for evaluating the seismic performance of a building, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the building seismic performance assessment method of the present application.

[0064] In this embodiment, the building seismic performance assessment method includes steps S10 to S40:

[0065] Step S10, obtaining the observed acceleration of the target building, and performing zero padding processing on the observed acceleration to obtain a reference acceleration.

[0066] It is understandable that the observed acceleration may be the acceleration generated when a simulated vibration is applied to the target building, or the acceleration generated by the target building during a real earthquake.

[0067] It is understandable that the target building can be a building for seismic performance assessment, and the reference acceleration can be the acceleration after the observed acceleration is processed. The reference acceleration after zero-padding processing will not change the basic characteristics and statistical properties of the original data, and can simulate a smoother transition, thereby avoiding these adverse effects.

[0068] In a feasible implementation, step S10 may include steps A11 to A13:

[0069] Step A11, obtaining the observed acceleration of the target building.

[0070] It should be noted that the observed acceleration can be obtained by installing accelerometers at key locations of the target building (such as on different floors of the structure, key support points, etc.), and the sensors are used to monitor and record the acceleration response of the building under earthquake or other dynamic effects in real time.

[0071] Step A12, when the front end or / and the rear end of the observed acceleration are not zero, adding zero to the front end or / and the rear end of the observed acceleration to obtain a reference acceleration.

[0072] It should be noted that by checking the starting point and the end point of the observed acceleration time history data, it is identified whether the front end and the back end of the observed acceleration are zero. If it is found that the data value at either or both ends is not zero, zero padding is required.

[0073] It should be understood that the observed acceleration front end or / and rear end not being zero may be caused by a start-up delay of the measuring device, an inertia effect after stopping, or other factors.

[0074] In a specific implementation, at the front end of the observed acceleration time series (if it is not zero), one or more zero value points are added to the front of the observed acceleration time series; similarly, at the back end of the observed acceleration time series (if it is not zero), one or more zero value points are also added to the end of the time series.

[0075] Step A13, when the front end and the rear end of the observed acceleration are zero, use the observed acceleration as a reference acceleration.

[0076] It is understandable that when the front end and the rear end of the observed acceleration are zero, there is no need to further process the observed acceleration.

[0077] In this embodiment, the observed acceleration is padded with zeros to effectively reduce the boundary effect in the numerical analysis process, avoid errors or abnormal results caused by non-zero boundaries, and to a certain extent suppress the drift error introduced by the non-zero starting or ending points when integrating the acceleration data to obtain the velocity and displacement, thereby improving the reliability of the obtained velocity and displacement time history.

[0078] The above are only feasible implementations of step S10 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S10.

[0079] Step S20, performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient.

[0080] It is understandable that the preset acceleration characteristic function may be obtained in advance based on the set boundary conditions and the set sixth-order ordinary differential equation.

[0081] It should be understood that the expansion coefficient may refer to the weight or proportional factor before each characteristic function when the reference acceleration time history is expressed as a linear combination of a series of preset acceleration characteristic functions (through a specific mathematical transformation).

[0082] In a feasible implementation, step S20 may include steps A21 to A23:

[0083] Step A21, obtaining the total number of discrete time points according to the reference acceleration.

[0084] It can be understood that the total number of discrete time points may be the number of discrete time points determined to represent the reference acceleration time history.

[0085] It should be understood that the reference acceleration time history is usually recorded by an accelerometer at a certain sampling frequency, which determines the time interval between two consecutive data points.

[0086] It can be understood that the total number of discrete time points can be obtained according to the sampling interval of the reference acceleration and the total time length.

[0087] Step A22, constructing an expansion function according to the total number of discrete time points and the preset acceleration characteristic function.

[0088] It should be noted that the acceleration time history can be expressed by referring to the following formula:

[0089]

[0090] Where N is the total number of discrete time points, A(t) is the acceleration time history, and a n represents the expansion coefficient, Represents the preset acceleration characteristic function.

[0091] Furthermore, multiply both sides of the acceleration time history expression by And integrate from 0 to T to get the expansion function, refer to the following formula for details:

[0092]

[0093] Step A23, integrating and transforming the expansion function to obtain a coefficient function, and analyzing the coefficient function to obtain expansion coefficients.

[0094] It should be noted that the coefficient function obtained by integrating and transforming the expansion function may be two parameters in advance, as follows:

[0095]

[0096] Furthermore, the above two parameters are substituted into the expansion function to obtain the deformed coefficient function, as follows:

[0097]

[0098] It is understandable that solving the coefficient function can determine a n .

[0099] In this implementation, by solving the expansion coefficient and then further using the expansion coefficient to obtain the velocity time history and displacement time history, the drift error problem common in traditional numerical integration methods is avoided, and high-precision conversion from acceleration to velocity and displacement time history is achieved, thereby significantly improving the accuracy and reliability of the structural dynamic response analysis and providing solid data support for performance-based seismic design.

[0100] The above are only feasible implementations of step S20 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S20.

[0101] Step S30, obtaining a target speed time history and a target displacement time history according to a preset displacement characteristic function, a preset speed characteristic function and the expansion coefficient.

[0102] It should be noted that the preset displacement characteristic function, the preset velocity characteristic function and the preset acceleration characteristic function are all a type of basis function, and the basis function can be obtained by solving a preset sixth-order ordinary differential equation.

[0103] It should be noted that the velocity state function and the displacement velocity function can be first constructed according to the preset displacement characteristic function and the preset velocity characteristic function, and then the velocity state function and the displacement velocity function can be solved according to the expansion coefficient to obtain the target velocity time history and the target displacement time history respectively.

[0104] It should be understood that the velocity time history and displacement time history refer to the velocity and displacement of the building structure that change over time under specific dynamic loads (such as earthquakes, wind forces, etc.); the target velocity time history and target displacement time history are the vibration velocity and vibration displacement generated by the building that are closer to the real data after eliminating the signal distortion problem caused by drifting.

[0105] In a feasible implementation, step S30 may include steps A31 to A32:

[0106] Step A31, obtaining a target displacement time history by cumulatively summing the preset displacement characteristic function and the expansion coefficient.

[0107] It should be noted that the cumulative summation is performed according to the preset displacement characteristic function and the expansion coefficient

[0108]

[0109] Step A32, obtaining a target speed schedule by cumulatively summing the preset speed characteristic function and the expansion coefficient.

[0110] It should be noted that the cumulative summation according to the preset speed characteristic function and the expansion coefficient can be specifically referred to the following formula:

[0111] Wherein, V(t) represents the target speed time course.

[0112] In this embodiment, the target velocity time series and target displacement time series that meet the initial and terminal stationary conditions are obtained by presetting the displacement characteristic function, the preset velocity characteristic function and the expansion coefficient, so that the seismic performance of the building can be more accurately evaluated based on the target velocity time series and the target displacement time series.

[0113] The above are only feasible implementations of step S30 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S30.

[0114] Step S40: evaluating the seismic performance of the target building according to the target velocity time history and the target displacement time history.

[0115] It should be noted that the inter-story displacement angle and the peak displacement (maximum displacement) of the target building are calculated according to the target velocity time history and the target displacement time history, and the seismic performance of the target building is evaluated based on the inter-story displacement angle and the peak displacement.

[0116] It should be noted that the inter-story displacement angle is the core indicator for measuring the degree of structural damage, and directly reflects the deformation capacity and damage state of the structure under earthquake action. The size of the inter-story displacement angle can be used to evaluate whether components such as frame columns and beams have entered the elastic or plastic stage, and to judge the safety and repairability of the structure. The inter-story displacement angle can also reflect the deformation requirements of non-structural components such as exterior walls and partitions to ensure that these components will not fail under earthquake action. Moreover, performance-based seismic design closely links the inter-story displacement angle with the expected performance level (such as immediate use, life safety, and collapse prevention), and different performance targets correspond to different inter-story displacement angle limits. For example, immediate use usually requires the inter-story displacement angle to not exceed 0.5%-1.0%, while life safety may allow 2.0%-3.0%.

[0117] Furthermore, the impact of peak displacement assessment on performance-based seismic design and analysis. As an important representation of the overall response of the structure, peak displacement directly reflects the maximum deformation demand of the structure under earthquake action. Excessive peak displacement may lead to overall stability problems, especially in high-rise buildings or flexible structures. According to the peak displacement, it is possible to check whether the bearing capacity of components (such as columns, supports, etc.) meets the requirements. Moreover, in performance-based seismic design, seismic deformation demand is usually quantified by peak displacement, and peak displacement is used as the main design indicator for displacement-based seismic design. The design goal is to allow the structure to meet the set performance level under the peak displacement demand.

[0118] Among them, inter-story displacement angle and peak displacement are the core indicators of performance-based seismic design and analysis. The former is mainly used to measure local deformation demand and damage state, and the latter is used to quantify overall deformation demand and stability. By scientifically calculating and evaluating these two indicators, precise control of structural seismic performance can be achieved, guiding the setting of performance goals, optimization of design schemes, and post-earthquake functional recovery and evaluation. However, using traditional methods, the displacement time history obtained has inaccurate problems such as drifting, which affects the use of performance-based seismic design methods.

[0119] In a feasible implementation, step S40 may include steps A41 to A43:

[0120] Step A41, obtaining the inter-story displacement angle and structural displacement of the target building according to the target velocity time history and the target displacement time history.

[0121] It should be understood that the inter-story drift ratio refers to the ratio of the relative horizontal displacement between two adjacent floors of a building to the vertical distance between the two floors. It is an important indicator for evaluating the deformation performance of a building under earthquake or other dynamic loads.

[0122] It should be understood that the structural displacement refers to the movement of any point above the foundation of the entire building relative to the initial position, which can be a displacement in the horizontal direction, vertical direction or any other direction, depending on the type of load and structural response considered. The structural displacement described in this embodiment specifically refers to the peak displacement.

[0123] It should be noted that the calculation of the inter-story displacement angle can be to first determine the target displacement time history of each floor and extract the displacement time history of the center point of each floor from the target displacement time history of the overall structure. Then calculate the inter-story displacement: for each pair of adjacent floors (the nth floor and the n+1th floor), calculate their horizontal displacement difference at the same time Δu(n)=u(n+1)-u(n), where u represents the horizontal displacement. Finally, calculate the inter-story displacement angle: use the formula θ(n)=Δu(n) / h(n), where θ is the inter-story displacement angle and h(n) is the height difference between the two floors.

[0124] It should be further explained that the calculation of structural displacement can be obtained directly from the target displacement time history: if the target displacement time history already contains the data of a specific monitoring point, the displacement value of that point can be directly read as part of the structural displacement. Comprehensive analysis: In order to obtain a more comprehensive structural displacement image, it may be necessary to combine the data of multiple monitoring points for comprehensive analysis, especially when the focus is on the overall displacement of the building rather than the local displacement. The calculation of the maximum displacement can be to identify the maximum displacement directly from the displacement time history. The displacement time history has given the position information that changes with time, so the peak value during this period can be directly found as the maximum displacement. Or find the peak value: check the displacement time history graph and find the maximum values ​​in the positive and negative directions. The one with the larger absolute value of the two values ​​is the maximum displacement.

[0125] Step A42: comparing the inter-story displacement angle and the structural displacement according to a preset displacement angle threshold and a structural displacement threshold to obtain a comparison result.

[0126] It should be noted that the preset displacement angle threshold may be 1 / 100-1 / 200. If the inter-layer displacement angle exceeds the preset displacement angle threshold, it is considered that the structure has undergone significant inelastic deformation and there may be potential safety risks.

[0127] It should be noted that for reinforced concrete frame structures, the displacement threshold should not be greater than 1 / 550. For steel structures and other types of structures, the structural displacement threshold is between 1 / 250 and 1 / 550.

[0128] It should be noted that the comparison results may include the inter-story displacement angle being less than a preset displacement angle threshold and the structural displacement being less than the structural displacement threshold, the inter-story displacement angle being less than the preset displacement angle threshold and the structural displacement being greater than or equal to the structural displacement threshold, the inter-story displacement angle being greater than or equal to the preset displacement angle threshold and the structural displacement being less than the structural displacement threshold, and the inter-story displacement angle being greater than or equal to the preset displacement angle threshold and the structural displacement being greater than or equal to the structural displacement threshold.

[0129] Step A43: perform seismic performance evaluation based on the comparison result.

[0130] It is understandable that the results of the seismic performance assessment include normal seismic performance, poor seismic performance, and very poor seismic performance.

[0131] It should be noted that, when the comparison result is that the inter-story displacement angle is less than the preset displacement angle threshold and the structural displacement is less than the structural displacement threshold, the result of the seismic performance evaluation is that the seismic performance is normal; the comparison result is that the inter-story displacement angle is less than the preset displacement angle threshold and the structural displacement is greater than or equal to the structural displacement threshold / the inter-story displacement angle is greater than or equal to the preset displacement angle threshold and the structural displacement is less than the structural displacement threshold, then the result of the seismic performance evaluation is poor seismic performance; the comparison result is that the inter-story displacement angle is greater than or equal to the preset displacement angle threshold and the structural displacement is greater than or equal to the structural displacement threshold, then the result of the seismic performance evaluation is that the seismic performance is very poor.

[0132] In this embodiment, a preset displacement angle threshold and a structural displacement threshold are set in advance according to the maximum inter-story displacement and building displacement that the building can withstand, and the seismic performance of the target building is obtained by the preset displacement angle threshold and the structural displacement threshold and the calculated target displacement time course and target velocity time course.

[0133] The above are only feasible implementations of step S40 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S40.

[0134] In specific implementation, the logical structure of building seismic performance evaluation can refer to Figure 2 In the figure, an observed acceleration record is given. If the two ends are not 0 initially, the two ends are padded with zero to obtain the acceleration record A(t) after padded with zero. The acceleration record time is recorded as T. The set sixth-order ordinary differential equation is further solved to obtain the displacement characteristic function, velocity characteristic function and acceleration characteristic function. The acceleration characteristic function is further used to perform cardinality expansion to obtain each expansion coefficient. According to each expansion coefficient, the velocity time course and displacement time course consistent with the acceleration time course can be obtained.

[0135] In the specific implementation, the acceleration data tested in the earthquake simulation test project conducted in the Structural Engineering and Earthquake Simulation Laboratory of the University at Buffalo, State University of New York in 2014 was used in combination with the method of the present invention to calculate the corresponding displacement time history. In this earthquake simulation test project, a seismic acceleration time history collected in the Landers earthquake (California Integrated Seismic Network, CISN) was input into a high-rise seismic isolation building structure model base. This experiment used an acceleration sensor to measure the acceleration time history of the seismic isolation system. In this implementation method, the characteristic function method proposed in the present invention will be used to calculate the displacement time history of the seismic isolation system.

[0136] The specific implementation is as follows:

[0137] For the measured acceleration time history of the seismic isolation system, pre-processing is performed to fill the data with zeros at both ends so that the initial and final static conditions are met at both ends. The acceleration time history after zero filling can be referred to Figure 3, the total duration of the acceleration time history in the figure is 69.21 seconds. For the total duration of the acceleration time history of 69.21 seconds, the preset acceleration characteristic function, the preset velocity characteristic function and the preset displacement characteristic function are obtained. The display of the preset characteristic function can refer to Figure 4 Based on the preset acceleration characteristic function, the preset velocity characteristic function and the preset displacement characteristic function, the measured acceleration time history is expanded in series to obtain the expansion coefficient. According to the expansion coefficient, the velocity time history and displacement time history consistent with the acceleration time history can be obtained. The schematic diagram of the velocity time history and displacement time history can be referred to Figure 5 , using the displacement time histories of different floors, the inter-story displacement angle and maximum displacement demand of the structure are further calculated, so as to carry out performance-based seismic design and analysis of the structure.

[0138] This embodiment provides a method for evaluating the seismic performance of a building, which generates a stable reference acceleration by observing acceleration, and uses a preset acceleration characteristic function to perform a series expansion on the reference acceleration to accurately calculate the expansion coefficient; then based on the preset displacement and velocity characteristic functions combined with the above expansion coefficient, the target velocity time series and target displacement time series are accurately derived. This avoids the common drift error problem in the traditional numerical integration process, ensures the physical authenticity and accuracy of the obtained velocity and displacement time series, and provides a reliable basis for performance-based seismic design, so that the seismic performance of the target building under earthquake action can be more accurately evaluated, effectively supporting seismic design optimization and structural safety evaluation.

[0139] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 6 , before step S20, steps S201 to S203 are also included:

[0140] Step S201, obtaining the sixth-order vibration ordinary differential function and the stationary condition.

[0141] It can be understood that the sixth-order vibration ordinary differential function is based on the six independent motion modes of the target building (such as three translation directions and three rotation directions), using Newton's second law or Lagrange equations to construct the system's dynamic model. For each degree of freedom, there will be a second-order time derivative term (representing acceleration) associated with it, thus forming a sixth-order ordinary differential equation group.

[0142] It should be understood that determining boundary conditions is a key step in solving differential equations, especially in physics and engineering problems. Boundary conditions define the behavior of a system at a specific location or time and are very important for ensuring the uniqueness and physical meaning of the solution.

[0143] In practice, suppose we are studying the six-degree-of-freedom vibration problem of a multi-story building. The boundary condition can be that the foundation of the bottom floor is completely fixed, so the displacement of the six degrees of freedom (three translations and three rotations) is zero. The top floor may only restrict movement in certain directions, such as only allowing vertical displacement while prohibiting horizontal displacement and rotation. The connection between the floors determines the relative movement relationship between them. For example, a rigid connection means no relative displacement between the two floors, while a flexible connection allows a certain degree of relative deformation.

[0144] It should be understood that the sixth-order vibration ordinary differential function and the stationary condition may be pre-set based on experience according to the target building and directly obtained when needed.

[0145] Step S202, obtaining an initial displacement characteristic function, an initial velocity characteristic function and an initial acceleration characteristic function according to the sixth-order vibration ordinary differential function.

[0146] It should be understood that the purpose of obtaining the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function according to the sixth-order vibration ordinary differential function is to obtain consistent acceleration, velocity and displacement time history records. The key is to find a consistent basis function that satisfies all initial and final stationary conditions. Since there are six initial and final stationary conditions, six constants are required in the solution function to satisfy these conditions.

[0147] Among them, the sixth-order vibration ordinary differential function can refer to the following formula:

[0148]

[0149] By solving the above sixth-order vibration ordinary differential function, the following initial displacement characteristic function can be obtained:

[0150]

[0151] The initial displacement characteristic function is further differentiated to obtain the initial velocity characteristic function:

[0152]

[0153] Furthermore, the initial velocity characteristic function is further differentiated to obtain the initial acceleration characteristic function:

[0154]

[0155] Step S203: obtaining a preset characteristic function according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function.

[0156] It should be noted that the static conditions set according to the target building can refer to the following formula:

[0157]

[0158] It should be noted that, based on the static condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, six coefficient values ​​of the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function can be calculated, and then the preset characteristic function can be obtained by solving the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function according to the coefficients.

[0159] It should be noted that the preset characteristic function may include a preset displacement characteristic function, a preset velocity characteristic function and a preset acceleration characteristic function.

[0160] In a feasible implementation, step S203 may include steps A2031 to A2033:

[0161] Step A2031, constructing a coefficient matrix according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function.

[0162] It should be noted that the coefficient matrix may be a matrix obtained by substituting the initial displacement characteristic function, the initial velocity characteristic function, and the initial acceleration characteristic function into the stationary condition. The coefficient matrix may refer to the following formula:

[0163]

[0164] It should be noted that:

[0165]

[0166] ν=λT

[0167] Step A2032, analyzing the coefficient matrix to obtain eigenvalues.

[0168] It is understandable that the stationary condition can be that when the system is at rest, all motion has stopped, there is neither acceleration nor velocity, that is, all velocities and (accelerations are zero, then the following formula can be obtained:

[0169]

[0170] Further, the following formula is obtained:

[0171]

[0172] It should be noted that in order for C1, C1, C1, C1, C1, C1 to have nontrivial solutions, the determinant of the coefficient matrix should be 0, resulting in the characteristic equation:

[0173]

[0174] It should be noted that the above characteristic equation is a transcendental equation with infinite roots or eigenvalues. It can be proved that there are two sets of roots: the first set of roots is exactly given by The second set of roots are 9.4270555709, 15.7079533785, 21.9911486180, 28.2743338821, etc., which are approximately given by cos(ν / 2)=0:ν=(2k+1)π, k=1,2,... For ν>30, this approximation is very good, with a relative error of less than 10 -12 .

[0175] Among them, the eigenvalue can be expressed as ν n =λ n T=(n+1)π,n=1,2,K,when n is an odd number, the result is exact, when n is an even number, the result is approximate.

[0176] Step A2033, obtaining a preset characteristic function according to the characteristic value, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, wherein the preset characteristic function includes a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function.

[0177] It should be noted that the solution can be obtained by substituting any characteristic value into the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, and the preset characteristic functions include a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function.

[0178] In a specific implementation, the preset characteristic function obtained according to the characteristic value includes a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function. The schematic diagram of the preset acceleration characteristic function, the preset velocity characteristic function and the preset displacement characteristic function can be referred to. Figure 7 , Figure 7 The top layer is a schematic diagram of a preset acceleration characteristic function, the middle layer is a schematic diagram of a preset velocity characteristic function, and the bottom layer is a schematic diagram of a displacement characteristic function.

[0179] In this embodiment, by constructing a coefficient matrix based on the static conditions and the initial displacement, velocity and acceleration characteristic functions and analyzing the matrix to obtain the eigenvalues, the natural frequency and modal shape of the system can be accurately determined, and the preset acceleration, displacement and velocity characteristic functions can be further derived, providing a basis for calculating the velocity time history and displacement time history without drift.

[0180] The above are only feasible implementations of step S203 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S203.

[0181] This embodiment provides a method for evaluating the seismic performance of buildings. By establishing a sixth-order ordinary differential equation for vibration and determining the static condition, the dynamic behavior of a multi-degree-of-freedom system and its equilibrium state in the absence of external forces are accurately described. The static condition is combined with the above-mentioned initial characteristic function to construct a preset characteristic function, which provides a basis for subsequent dynamic response analysis and makes the performance prediction of complex structures under various loads more accurate and reliable, thereby obtaining accurate and effective displacement time history and velocity time history, providing a good data basis for evaluating the seismic performance of buildings.

[0182] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the building seismic performance assessment method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0183] This application also provides a building seismic performance evaluation device, please refer to Figure 8 , the building seismic performance evaluation device comprises:

[0184] An acquisition module 10 is used to acquire the observed acceleration of the target building and to perform zero padding on the observed acceleration to obtain a reference acceleration;

[0185] A parameter calculation module 20, configured to perform series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient;

[0186] The parameter calculation module 20 is further used to obtain a target velocity time course and a target displacement time course according to a preset displacement characteristic function, a preset velocity characteristic function and the expansion coefficient;

[0187] The evaluation module 30 is used to evaluate the seismic performance of the target building according to the target velocity time history and the target displacement time history.

[0188] The building seismic performance evaluation device provided by the present application adopts the building seismic performance evaluation method in the above embodiment, which can solve the technical problem that the traditional numerical integration of acceleration data usually introduces unrealistic drift components into the required velocity time history and displacement time history, resulting in inaccurate evaluation of the building seismic performance through the velocity time history and displacement time history. Compared with the prior art, the beneficial effects of the building seismic performance evaluation device provided by the present application are the same as the beneficial effects of the building seismic performance evaluation method provided by the above embodiment, and the other technical features of the building seismic performance evaluation device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0189] In one embodiment, the acquisition module 10 is further used to acquire the observed acceleration of the target building;

[0190] When the front end or / and the rear end of the observed acceleration are not zero, adding zero to the front end or / and the rear end of the observed acceleration to obtain a reference acceleration;

[0191] When the front end and the rear end of the observed acceleration are zero, the observed acceleration is used as the reference acceleration.

[0192] In one embodiment, the parameter calculation module 20 is further used to obtain the sixth-order vibration ordinary differential function and the stationary condition;

[0193] Obtaining an initial displacement characteristic function, an initial velocity characteristic function and an initial acceleration characteristic function according to the sixth-order vibration ordinary differential function;

[0194] A preset characteristic function is obtained according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function.

[0195] In one embodiment, the parameter calculation module 20 is further used to construct a coefficient matrix according to the static condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function;

[0196] Analyzing the coefficient matrix to obtain eigenvalues;

[0197] A preset characteristic function is obtained according to the characteristic value, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, and the preset characteristic function includes a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function.

[0198] In one embodiment, the parameter calculation module 20 is further used to obtain the total number of discrete time points according to the reference acceleration;

[0199] Constructing an expansion function according to the total number of discrete time points and the preset acceleration characteristic function;

[0200] The expansion function is integrated and deformed to obtain a coefficient function, and the coefficient function is analyzed to obtain expansion coefficients.

[0201] In one embodiment, the parameter calculation module 20 is further used to obtain a target displacement time course by cumulatively summing the preset displacement characteristic function and the expansion coefficient;

[0202] The target speed time course is obtained by cumulatively summing the preset speed characteristic function and the expansion coefficient.

[0203] In one embodiment, the evaluation module 30 is further used to obtain the inter-story displacement angle and the structural displacement of the target building according to the target velocity time history and the target displacement time history;

[0204] Comparing the inter-story displacement angle and the structural displacement according to a preset displacement angle threshold and a structural displacement threshold to obtain a comparison result;

[0205] The seismic performance is evaluated according to the comparison result.

[0206] The present application provides a building seismic performance assessment device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the building seismic performance assessment method in the above-mentioned embodiment one.

[0207] Reference below Fig. 9 , which shows a schematic diagram of the structure of a building seismic performance evaluation device suitable for implementing the embodiment of the present application. The building seismic performance evaluation device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig. 9 The building seismic performance evaluation device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0208] like Fig. 9As shown, the building seismic performance evaluation device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM) 1004. Various programs and data required for the operation of the building seismic performance evaluation device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the building seismic performance evaluation device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a building seismic performance evaluation device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0209] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0210] The building seismic performance evaluation device provided by the present application adopts the building seismic performance evaluation method in the above embodiment, which can solve the technical problem that the traditional numerical integration of acceleration data usually introduces unrealistic drift components into the required velocity time history and displacement time history, resulting in inaccurate evaluation of the building seismic performance through the velocity time history and displacement time history. Compared with the prior art, the beneficial effects of the building seismic performance evaluation device provided by the present application are the same as the beneficial effects of the building seismic performance evaluation method provided by the above embodiment, and the other technical features in the building seismic performance evaluation device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0211] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0212] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0213] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the building seismic performance assessment method in the above-mentioned embodiment.

[0214] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0215] The computer-readable storage medium may be included in the building seismic performance evaluation device; or may exist independently without being assembled into the building seismic performance evaluation device.

[0216] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the building seismic performance evaluation device, the building seismic performance evaluation device: obtains the observed acceleration of the target building, and performs zero-filling processing on the observed acceleration to obtain a reference acceleration; expands the reference acceleration series according to a preset acceleration characteristic function to obtain an expansion coefficient; obtains a target velocity time series and a target displacement time series according to a preset displacement characteristic function, a preset velocity characteristic function and the expansion coefficient; and evaluates the seismic performance of the target building according to the target velocity time series and the target displacement time series.

[0217] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0218] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0219] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0220] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned building seismic performance evaluation method, and can solve the technical problem that the traditional numerical integration of acceleration data usually introduces unrealistic drift components into the required velocity time history and displacement time history, resulting in inaccurate evaluation of the building seismic performance through the velocity time history and displacement time history. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the building seismic performance evaluation method provided by the above-mentioned embodiment, and will not be repeated here.

[0221] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned building seismic performance assessment method when executed by a processor.

[0222] The computer program product provided by the present application can solve the technical problem that the traditional numerical integration of acceleration data usually introduces unrealistic drift components into the required velocity time history and displacement time history, resulting in inaccurate evaluation of the seismic performance of the building through the velocity time history and displacement time history. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the building seismic performance evaluation method provided by the above-mentioned embodiment, which will not be repeated here.

[0223] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for evaluating the seismic performance of a building, characterized in that: The building seismic performance assessment method comprises: Obtaining the observed acceleration of the target building, and performing zero padding processing on the observed acceleration to obtain a reference acceleration; Performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient; Obtaining a target velocity time history and a target displacement time history according to a preset displacement characteristic function, a preset velocity characteristic function and the expansion coefficient; The seismic performance of the target building is evaluated according to the target velocity time history and the target displacement time history.

2. The building seismic performance evaluation method according to claim 1, characterized in that: The step of obtaining the observed acceleration of the target building and performing zero padding on the observed acceleration to obtain a reference acceleration includes: Get the observed acceleration of the target building; When the front end or / and the rear end of the observed acceleration are not zero, adding zero to the front end or / and the rear end of the observed acceleration to obtain a reference acceleration; When the front end and the rear end of the observed acceleration are zero, the observed acceleration is used as the reference acceleration.

3. The building seismic performance evaluation method according to claim 1, characterized in that: Before performing series expansion on the reference acceleration according to the preset acceleration characteristic function to obtain the expansion coefficient, the method further includes: Obtain the sixth-order vibration ordinary differential function and stationary conditions; Obtaining an initial displacement characteristic function, an initial velocity characteristic function and an initial acceleration characteristic function according to the sixth-order vibration ordinary differential function; A preset characteristic function is obtained according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function.

4. The building seismic performance evaluation method according to claim 3, characterized in that: The obtaining of the preset characteristic function according to the static condition, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function comprises: Constructing a coefficient matrix according to the stationary condition, the initial displacement characteristic function, the initial velocity characteristic function, and the initial acceleration characteristic function; Analyzing the coefficient matrix to obtain eigenvalues; A preset characteristic function is obtained according to the characteristic value, the initial displacement characteristic function, the initial velocity characteristic function and the initial acceleration characteristic function, and the preset characteristic function includes a preset acceleration characteristic function, a preset displacement characteristic function and a preset velocity characteristic function.

5. The building seismic performance evaluation method according to claim 1, characterized in that: The step of performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient includes: Obtaining a total number of discrete time points according to the reference acceleration; Constructing an expansion function according to the total number of discrete time points and the preset acceleration characteristic function; The expansion function is integrated and deformed to obtain a coefficient function, and the coefficient function is analyzed to obtain expansion coefficients.

6. The building seismic performance evaluation method according to claim 1, characterized in that: The step of obtaining the target speed time history and the target displacement time history according to the preset displacement characteristic function, the preset speed characteristic function and the expansion coefficient comprises: Obtaining a target displacement time history by cumulatively summing the preset displacement characteristic function and the expansion coefficient; The target speed time course is obtained by cumulatively summing the preset speed characteristic function and the expansion coefficient.

7. The building seismic performance evaluation method according to any one of claims 1 to 6, characterized in that: The performing seismic performance evaluation on the target building according to the target velocity time history and the target displacement time history comprises: Obtaining the inter-story displacement angle and the structural displacement of the target building according to the target velocity time history and the target displacement time history; Comparing the inter-story displacement angle and the structural displacement according to a preset displacement angle threshold and a structural displacement threshold to obtain a comparison result; The seismic performance is evaluated according to the comparison result.

8. A building seismic performance evaluation device, characterized in that: The building seismic performance evaluation device comprises: An acquisition module is used to acquire the observed acceleration of the target building and to perform zero padding on the observed acceleration to obtain a reference acceleration; A parameter calculation module, used for performing series expansion on the reference acceleration according to a preset acceleration characteristic function to obtain an expansion coefficient; The parameter calculation module is further used to obtain the target speed time history and the target displacement time history according to the preset displacement characteristic function, the preset speed characteristic function and the expansion coefficient; An evaluation module is used to evaluate the seismic performance of the target building according to the target velocity time history and the target displacement time history.

9. A building seismic performance assessment device, characterized in that: The device comprises: a memory, a processor, and a building seismic performance assessment program stored in the memory and executable on the processor, wherein the building seismic performance assessment program is configured to implement the building seismic performance assessment method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a building seismic performance evaluation program, and when the building seismic performance evaluation program is executed by the processor, the building seismic performance evaluation method according to any one of claims 1 to 7 is implemented.

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