Method and device for constructing vulnerability curve model of power transmission tower and electronic equipment

Abstract

The application provides a vulnerability curve model construction method and device of a power transmission tower and electronic equipment, and the method comprises the following steps: obtaining experimental data of a scaled power transmission tower model of the power transmission tower under multiple different landslide impact working conditions; determining the damage level of the scaled power transmission tower model of the power transmission tower under each working condition according to the maximum horizontal displacement of the experimental tower top and a preset damage level table; determining the exceeding damage probability of each type of damage level corresponding to each target actual landslide impact force according to the experimental landslide impact force under each working condition and the damage level under each working condition; and performing nonlinear fitting on each target actual landslide impact force and the exceeding damage probability of each damage level corresponding to each target actual landslide impact force to construct a vulnerability curve model of the power transmission tower in a landslide disaster process. The construction of the vulnerability curve model of the power transmission tower under the landslide disaster process is realized.

Description

Technical Field

[0001] This application relates to the field of disaster risk assessment research technology, and more specifically, to a method, apparatus and electronic equipment for constructing a vulnerability curve model of a transmission tower. Background Technology

[0002] As the intermediate carrier of power resource transportation, transmission towers support sustained economic development and ensure the orderly operation of people's lives. However, due to their inherently flexible, low-damping, and sensitive structure, and the increasing trend of transmission tower-line systems towards taller towers and longer spans, these systems are highly susceptible to bending and collapse under extreme weather conditions, earthquakes, and their secondary disasters. Therefore, vulnerability analysis of transmission towers under the influence of earthquakes, typhoons, rain, snow, ice, and geological disasters has become a focus of attention for scholars worldwide.

[0003] Existing technologies for dealing with landslides impacting power transmission towers, a typical geological disaster scenario, generally suffer from significant research gaps, weak experimental foundations, and a lack of quantitative models. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of the prior art by providing a method, apparatus, and electronic device for constructing a vulnerability curve model of a transmission tower, thereby improving the accuracy of constructing the vulnerability curve model of a transmission tower.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, embodiments of this application provide a method for constructing a vulnerability curve model of a transmission tower, the method comprising: Obtain experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions. Each experimental data includes at least the experimental landslide impact force and the maximum horizontal displacement at the top of the experimental tower. Based on the maximum horizontal displacement of the top of each experimental tower and the preset damage level table, the damage level of the scaled transmission tower model under each working condition is determined. The damage level includes at least: basically intact, slightly damaged, severely damaged and collapsed. The preset damage level table is used to record the mapping relationship between the horizontal displacement range and the damage level. Based on the experimental landslide impact force and the damage level under each working condition, the probability of exceeding the damage level corresponding to each target's actual landslide impact force is determined. Nonlinear fitting is performed on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to each actual landslide impact force to construct a vulnerability curve model of the transmission tower in the landslide disaster process. The vulnerability curve model is used to characterize the probability of the transmission tower being damaged by various damage levels under different landslide intensities.

[0006] Optionally, determining the probability of exceeding the failure level corresponding to each target actual landslide impact force based on the experimental landslide impact force and the failure level under each working condition includes: Based on Froude's similarity law, the experimental landslide impact force under each working condition is back-calculated to the actual landslide impact force of the transmission tower under each working condition; The intensity of each experimental landslide, the intensity range of each actual landslide, and the impact force of each target actual landslide are determined based on the preset experimental landslide impact force interval. Based on the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide, determine the probability of exceeding the damage level corresponding to each type of damage level of the actual landslide impact force for each target.

[0007] Optionally, the step of back-calculating the experimental landslide impact force under each working condition into the actual landslide impact force of the transmission tower under each working condition based on Froude's similarity law includes: Based on the Froude similarity law, the geometric similarity ratio of the landslide in the scaled-down transmission tower model, the density similarity ratio of the landslide, and the mass scaled-down ratio of the landslide, the impact force similarity ratio of the landslide is determined. Based on the similarity ratio of the impact force of landslides, the impact force of experimental landslides under each working condition is back-calculated into the impact force of each actual landslide.

[0008] Optionally, determining the probability of exceeding damage for each type of damage level corresponding to each target actual landslide impact force, based on the damage level under each actual landslide impact force and the intensity range of each actual landslide, includes: Determine the total number of all damage levels and the number of each type of damage level within the actual landslide intensity range; Based on the number of each damage level and the total number of all damage levels, determine the probability of occurrence of each damage level corresponding to the actual landslide impact force of the target. Based on the probability of occurrence of various damage levels and preset values, the probability of exceeding the damage level corresponding to the actual landslide impact force of the target is determined.

[0009] Optionally, determining the exceedance probability of each damage level corresponding to the actual landslide impact force based on the occurrence probability of each damage level and a preset value includes: If the damage level is basically intact, then the probability of exceeding damage for the basically intact type is determined to be the difference between the preset value and the probability of occurrence of the basically intact type. If the damage level is a minor damage type, then calculate the sum of the occurrence probability of the minor damage type and the occurrence probability of the minor damage type, and determine the over-damage probability of the minor damage type as the difference between the preset value and the sum; If the damage level is a severe damage type, then the probability of exceeding the damage threshold for the severe damage type is determined based on the probability of occurrence of the minor damage type, the probability of occurrence of the basically intact type, the probability of occurrence of the severe damage type, and the preset value.

[0010] Optionally, the nonlinear fitting of the actual landslide impact force of each target and the probability of exceeding the failure level corresponding to each actual landslide impact force to construct a vulnerability curve model of the transmission tower during the landslide disaster process includes: The vulnerability curve model is obtained by nonlinear fitting using the actual landslide impact force of each target as the independent variable and the probability of exceeding the failure level corresponding to each actual landslide impact force as the dependent variable.

[0011] Optionally, the vulnerability curve model includes the probability of occurrence of minor damage type under different landslide intensities, the probability of occurrence of severe damage type under different landslide intensities, and the probability of occurrence of collapse damage type under different landslides.

[0012] Secondly, embodiments of this application also provide a device for constructing a vulnerability curve model of a transmission tower, the device comprising: The acquisition module is used to acquire experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions. Each of the experimental data includes at least the experimental landslide impact force and the maximum horizontal displacement at the top of the experimental tower. The determination module is used to determine the damage level of the scaled transmission tower model under various working conditions based on the maximum horizontal displacement at the top of each experimental tower and a preset damage level table. The damage level includes at least: basically intact, slightly damaged, severely damaged, and collapsed. The preset damage level table is used to record the mapping relationship between the horizontal displacement range and the damage level. The determination module is used to determine the probability of exceeding the damage level corresponding to the actual landslide impact force of each target based on the experimental landslide impact force and the damage level under each working condition. A construction module is used to perform nonlinear fitting on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to each actual landslide impact force, and to construct a vulnerability curve model of the transmission tower during the landslide disaster process. The vulnerability curve model is used to characterize the probability of the transmission tower experiencing damage of various damage levels under different landslide intensities.

[0013] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus. The memory stores program instructions executable by the processor. When the application runs, the processor communicates with the memory via the bus, and the processor executes the program instructions to perform the steps of the method for constructing the vulnerability curve model of the transmission tower described in the first aspect.

[0014] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which is read and executes the steps of the method for constructing the vulnerability curve model of the transmission tower described in the first aspect.

[0015] The beneficial effects of this application are: This application provides a method, apparatus, and electronic equipment for constructing a vulnerability curve model of a transmission tower. The method determines the damage level of a scaled-down transmission tower model under various operating conditions based on the maximum horizontal displacement at the top of each experimental tower and a preset damage level table. Then, based on the experimental landslide impact force and the damage level under each operating condition, it determines the probability of exceeding various damage levels corresponding to the actual landslide impact force for each target. Finally, it performs nonlinear fitting on the actual landslide impact force and the probability of exceeding various damage levels corresponding to the actual landslide impact force for each target, thus constructing a vulnerability curve model of the transmission tower during a landslide disaster. A physical scaled-down model experiment was employed to directly acquire experimental data under various real landslide impact conditions. This experimental data ensured the reliability of the input source for subsequent modeling, avoiding model distortion caused by inappropriate assumptions and laying the foundation for the accuracy of the entire vulnerability model. The physical quantity "maximum horizontal displacement at the top of the experimental tower" was discretized into distinct damage levels, realizing the division of continuous damage states into finite and ordered levels. This created the necessary conditions for subsequent probability statistics of discrete events and served as a key bridge between physical experiments and probabilistic risk assessment. Finally, nonlinear fitting was performed on the discrete data points to construct a continuous and smooth mathematical model, eliminating the jumps in discrete data points. This allows the corresponding failure probability to be derived from the constructed vulnerability curve model for any real landslide impact force between experimental conditions, greatly enhancing the model's practicality and flexibility. The construction of a vulnerability curve model for transmission towers under landslide disaster processes was successfully achieved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a prototype transmission tower provided for an embodiment of this application; Figure 2 A method for providing embodiments of this application Figure 1 A schematic diagram of a scaled-down model of a transmission tower prototype. Figure 3 A schematic diagram of a test model device for deformation and damage of a transmission tower caused by landslide impact, provided in an embodiment of this application; Figure 4 A flowchart illustrating a method for constructing a vulnerability curve model of a transmission tower, as provided in an embodiment of this application; Figure 5 A flowchart illustrating the second method for constructing a vulnerability curve model of a transmission tower provided in this application embodiment; Figure 6 A flowchart illustrating the third method for constructing a vulnerability curve model of a transmission tower provided in this application embodiment; Figure 7 A schematic diagram illustrating the probability of occurrence of different levels of damage, provided for embodiments of this application; Figure 8 A schematic diagram of a fragility curve provided for an embodiment of this application; Figure 9 A schematic diagram of an apparatus for constructing a vulnerability curve model of a transmission tower, provided in an embodiment of this application; Figure 10 This is a structural block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0019] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0021] Optionally, the vulnerability curve model construction method for transmission towers provided in this application embodiment can be applied to electronic devices, such as mobile phones, tablets, laptops, handheld computers, desktop computers, and other terminal devices with computing and display capabilities, or servers. Specifically, it can be applied to applications in terminal devices, such as mobile phone applications (APPs) and computer application systems.

[0022] The scaled-down model of the transmission tower in this application is described in detail below.

[0023] Figure 1This is a schematic diagram of a prototype transmission tower provided in an embodiment of this application. The tower has a total height of 109.8m, a cross-section of 89m, a base span of 23.58m, a foundation diameter of 2m, and a weight of 274.05t. The tower body is mainly made of Q335 and Q345 steel. In landslide impact tests on transmission towers, the test models are usually scaled down, which can lead to deviations between experimental conditions and actual working conditions due to variations in different physical quantities. To ensure that the results of the scaled-down experiments can be correctly mapped to the prototype structure, similarity theory is required to maintain consistency between the experimental model and the prototype structure in key physical aspects. Table 1 below shows a similarity table for scaled-down experiments provided in an embodiment of this application.

[0024] Table 1

[0025] In the process of constructing the scaled-down transmission tower model, to reduce manufacturing difficulty while ensuring that the overall mass of the model does not change significantly, this application simplifies or removes some auxiliary components and crossarms on the upper part of the original transmission tower. However, considering the contribution of these auxiliary components to the overall mass of the transmission tower, to achieve mass equivalence, small lead blocks are used in the scaled-down transmission tower model to load compensating mass at corresponding nodes to ensure a reasonable overall mass distribution. To accurately simulate the stiffness characteristics of the transmission tower, this application uses hollow copper tubes to separate the overall bending stiffness of the tower in the axial direction, ensuring that the deformation characteristics of the scaled-down transmission tower model under external forces are close to the original while simplifying the model structure and meeting the stiffness similarity requirements. In addition, the external structure of the transmission tower frame is simulated using lightweight materials such as PP sheets to restore the geometry of the transmission tower as much as possible, simulate the stress characteristics of the transmission tower, and reduce the manufacturing difficulty and material cost of the scaled-down transmission tower model. Through the above methods, a scaled-down transmission tower model that maintains a high degree of equivalence in terms of mass, stiffness, and geometry is established. Figure 2 A method for providing embodiments of this application Figure 1 A schematic diagram of a scaled-down model of a transmission tower prototype.

[0026] The scaled-down landslide model is designed as follows: the slope is divided into three parts, from top to bottom: a gravelly soil landslide body, the slope itself, and bedrock. Each layer is laid in layers and appropriately leveled and compacted. The bedrock model is prepared using materials such as river sand and cement in different proportions, while the landslide body model is prepared using materials such as bentonite, medium-coarse sand, and graphite powder in different proportions. The sliding surface of the landslide will use a low-resistivity material to replace the weak structural surface. Throughout the experiment, the weight of the landslide body will be kept constant at 150 kg. Table 2 below is a schematic diagram of the physical parameters of each soil layer in the scaled-down landslide model provided in this application embodiment.

[0027] Table 2

[0028] The test trough used in this application is a rigid semi-open landslide test trough, with internal dimensions of 2.7m * 1.6m * 0.6m, constructed from steel plates, acrylic plates, and channel steel. A scaled-down transmission tower model will be fixed below the slope of a scaled-down landslide model, with the bottom end of the hollow copper tube embedded in the bedrock below, while the top end of the copper tube is nested with a lightweight iron tower frame to simulate the overall dynamic response of the scaled-down transmission tower model during landslide impact. Simultaneously, an impact force sensor is placed below the hollow copper tube of the scaled-down transmission tower model to collect the impact force when it is struck by the landslide mass. Furthermore, a laser displacement meter will be installed on the front of the landslide test trough to measure the maximum horizontal displacement of the top of the scaled-down transmission tower model after the landslide impacts it. Figure 3 A schematic diagram of a test model device for deformation and damage of a transmission tower caused by a landslide, provided in an embodiment of this application.

[0029] Figure 4 This is a flowchart illustrating a method for constructing a vulnerability curve model of a transmission tower, as provided in an embodiment of this application. The subject executing this method is the aforementioned electronic equipment. Figure 4 As shown, the method includes: S101. Obtain experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions.

[0030] The experimental data include at least the impact force of the landslide and the maximum horizontal displacement of the top of the experimental tower.

[0031] Specifically, it can be done according to the above. Figure 3 The scaled-down model of the transmission tower was placed below the slope of the scaled-down landslide model, and experiments were conducted based on the different working conditions in Table 4 below. Experimental data for each working condition were obtained. The experimental data for each working condition included the experimental landslide impact force and the maximum horizontal displacement of the top of the experimental tower.

[0032] Table 3 below is a schematic table of working condition data provided in this embodiment. Other working conditions can also be designed, and there are no restrictions here. Each working condition data includes the height of the landslide centroid, the distance from the tower to the toe of the slope, the slope of the slope body, and the landslide impact mode.

[0033] Table 3

[0034] S102. Based on the maximum horizontal displacement at the top of each experimental tower and the preset damage level, determine the damage level of the scaled-down transmission tower under each working condition.

[0035] The damage levels include at least: basically intact, slightly damaged, severely damaged, and collapsed. A preset damage level table records the mapping relationship between horizontal displacement ranges and damage levels. Each damage level corresponds to a horizontal displacement range, which refers to the range of the maximum horizontal displacement at the top of the experimental tower. For example, the horizontal displacement range (A1, A2) corresponds one-to-one with the basically intact type. That is, if the maximum horizontal displacement at the top of the experimental tower under a certain working condition is between (A1, A2), then the damage level under that working condition is basically intact.

[0036] For example, the damage level corresponding to the maximum horizontal displacement at the top of the experimental tower in the experimental data under each working condition can be determined based on the mapping relationship between each damage level and the horizontal displacement range in the preset damage levels, thus obtaining the damage level under each working condition.

[0037] S103. Based on the experimental landslide impact force and the damage level under each working condition, determine the probability of exceeding the damage level corresponding to each target's actual landslide impact force.

[0038] Optionally, experimental data can be obtained through tests on a scaled-down transmission tower model, but the ultimate goal is to construct a vulnerability curve model suitable for the transmission tower prototype. Therefore, it is necessary to convert the experimental landslide impact force in the experimental data into the real-world landslide impact force acting on the transmission tower prototype, and then perform statistical analysis to calculate the exceedance probability of each damage level corresponding to the real-world landslide impact force. A single real-world landslide impact force may correspond to one or more damage levels; therefore, it is necessary to calculate the exceedance probability of each damage level corresponding to that real-world landslide impact force.

[0039] For example, if the actual landslide impact force is 1.012 kN, this actual landslide impact force corresponds to two types of damage levels, such as basically intact and slightly damaged. The probability of super damage for the basically intact type is, for example, 0.33, and the probability of super damage for the slightly damaged type is 0.

[0040] S104. Nonlinear fitting is performed on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to the actual landslide impact force of each target to construct a vulnerability curve model of the transmission tower in the landslide disaster process.

[0041] Among them, the vulnerability curve model is used to characterize the probability of transmission towers suffering damage of various levels under different landslide intensities.

[0042] Optionally, after obtaining the probability of exceeding the damage level corresponding to each target's actual landslide impact force, a series of discrete data points are obtained. In order to obtain a continuous, smooth mathematical model that can be used for engineering prediction, these discrete data points need to be curve-fitted to obtain the vulnerability curve model of the transmission tower prototype during the landslide disaster process.

[0043] In this embodiment, the damage level of the scaled transmission tower model under various working conditions is determined based on the maximum horizontal displacement at the top of each experimental tower and a preset damage level table. Then, based on the experimental landslide impact force and the damage level under each working condition, the probability of exceeding the damage level corresponding to each target actual landslide impact force is determined. Nonlinear fitting is performed on each target actual landslide impact force and the probability of exceeding the damage level corresponding to each target actual landslide impact force to construct a vulnerability curve model of the transmission tower during the landslide disaster process. A physical scaled-down model experiment was employed to directly acquire experimental data under various real landslide impact conditions. This experimental data ensured the reliability of the input source for subsequent modeling, avoiding model distortion caused by inappropriate assumptions and laying the foundation for the accuracy of the entire vulnerability model. The physical quantity "maximum horizontal displacement at the top of the experimental tower" was discretized into distinct damage levels, realizing the division of continuous damage states into finite and ordered levels. This created the necessary conditions for subsequent probability statistics of discrete events and served as a key bridge between physical experiments and probabilistic risk assessment. Finally, nonlinear fitting was performed on the discrete data points to construct a continuous and smooth mathematical model, eliminating the jumps in discrete data points. This allows the corresponding failure probability to be derived from the constructed vulnerability curve model for any real landslide impact force between experimental conditions, greatly enhancing the model's practicality and flexibility. The construction of a vulnerability curve model for transmission towers under landslide disaster processes was successfully achieved.

[0044] Figure 5 This is a flowchart illustrating the second method for constructing a vulnerability curve model of a transmission tower provided in this application embodiment, as shown below. Figure 5 As shown, S103 above, determining the probability of exceeding various damage levels corresponding to the actual landslide impact force of each target based on the experimental landslide impact force and the damage level under each working condition, may include: S201. Based on Froude's similarity law, the experimental landslide impact force under each working condition is back-calculated into the actual landslide impact force of the transmission tower under each working condition.

[0045] Specifically, due to the high cost and difficulty in implementing full-scale landslide impact tests, a series of landslide impact simulation experiments were conducted using a scaled-down model. Under various conditions, including different terrain slopes, landslide volumes, movement velocities, and soil properties, experimental landslide impact forces were collected from the experimental data for each condition. To ensure that the model test results effectively reflect the mechanical behavior in real-world scenarios, Froude's similarity principle was used as a dynamic similarity criterion. This similarity criterion is applicable to free surface flow or block movement processes where gravity is the dominant force, such as landslides, debris flows, and avalanches. According to Froude's similarity principle, when the model and the prototype satisfy geometric and dynamic similarity, the ratio of inertial force to gravity remains constant, i.e., the Froude number is equal. Based on this, the experimental landslide impact force was back-calculated to obtain the actual landslide impact force of the transmission tower prototype under various conditions.

[0046] S202. Determine the intensity of each experimental landslide, the intensity range of each actual landslide, and the impact force of each target actual landslide based on the preset experimental landslide impact force interval.

[0047] The preset experimental landslide impact force interval can be, for example, 0.2N. This means that the experimental landslide impact forces in the experimental data are divided into 0.2N intervals, and the median of each interval is taken as the intensity of each experimental landslide. After obtaining the intensity of each experimental landslide, it is inversely calculated according to the method in step S201 to obtain the actual impact force of each target landslide. The interval between the actual impact forces of each target landslide is taken as the intensity interval of each actual landslide. Therefore, there is a one-to-one correspondence between an intensity interval of an actual landslide and an actual impact force of a target landslide.

[0048] For example, if the experimental landslide impact force ranges are divided into intervals of 0~0.2, 0.2~0.4, 0.4~0.6, 0.6~0.8, etc., using 0.2N as the unit, the median of each interval is taken as the experimental landslide intensity, resulting in experimental landslide intensities of 0.1N, 0.3N, 0.5N, 0.7N, etc. Then, the experimental landslide intensities are back-calculated to obtain the actual target landslide impact forces of 0.338kN, 1.012kN, 1.688kN, 2.363kN, etc., meaning the actual landslide intensity ranges are 0-0.338kN; 0.338 kN-1.012kN; 1.012kN-1.688kN; 1.688kN-2.363kN, etc.

[0049] S203. Based on the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide, determine the probability of exceeding the damage level corresponding to each type of damage level of each target actual landslide impact force.

[0050] Optionally, in step S201, the experimental landslide impact force under each working condition is back-calculated into the actual landslide impact force of the transmission tower under each working condition. One working condition corresponds to one damage level, and one working condition corresponds to a set of experimental landslide impact forces and the maximum horizontal displacement at the top of the experimental tower. The damage level corresponding to the maximum horizontal displacement at the top of each experimental tower can be used to deduce the damage level corresponding to each experimental landslide impact force. The damage level corresponding to each experimental landslide impact force is the damage level corresponding to the actual landslide impact force obtained by back-calculating each experimental landslide impact force.

[0051] Therefore, after obtaining the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide in step S202, the probability of exceeding the damage level corresponding to each actual landslide intensity range can be obtained. As can be seen from step S202, each actual landslide intensity range corresponds one-to-one with a target actual landslide impact force. Therefore, the probability of exceeding the damage level corresponding to each actual landslide intensity range is taken as the probability of exceeding the damage level corresponding to the target actual landslide impact force of each actual landslide intensity range.

[0052] In this embodiment, by introducing Froude's similarity law to establish a quantitative bridge between the model and reality, the reliability and applicability of the transformation of laboratory research results into engineering practice are significantly improved, and the problems of strong subjectivity and low accuracy of traditional empirical analogy methods are solved.

[0053] Optionally, the step in S201 above, which uses Froude's similarity law to back-calculate the experimental landslide impact force under each working condition into the actual landslide impact force of the transmission tower under each working condition, may include: Based on Froude's similarity law, the geometric similarity ratio, density similarity ratio, and mass scaling ratio of the landslide in the scaled-down transmission tower model, the impact force similarity ratio of the landslide is determined. Based on the impact force similarity ratio, the experimental landslide impact force under each working condition is then calculated back to the actual landslide impact force. Table 1 shows that the geometric similarity ratio of the landslide is 1:150, and the density similarity ratio is 1. Therefore, based on Froude's similarity law, the similarity ratios of velocity and time are respectively... The mass scale of the landslide is . The momentum scaling ratio of the landslide is The similarity ratio of the impact force of the landslide is: Based on the similarity ratio of the impact force of landslides, the experimental landslide impact force under each working condition is back-calculated into the actual landslide impact force. For example, the experimental landslide impact force is divided by the similarity ratio of the impact force of landslides to obtain the actual landslide impact force.

[0054] Figure 6 A flowchart illustrating the third method for constructing a vulnerability curve model of a transmission tower provided in this application embodiment is shown below. Figure 6As shown, in S203 above, determining the probability of exceeding various damage levels corresponding to each actual landslide impact force based on the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide can include: S301. Determine the total number of all damage levels within the actual landslide intensity range, as well as the number of each type of damage level.

[0055] Specifically, for each actual landslide intensity range, we can first determine all actual landslide impact forces within that range. Then, we take the number of damage levels corresponding to each actual landslide impact force within that range as the total number of damage levels within that range, and determine the number of each damage level. For example, in a certain actual landslide intensity range, there are 5 damage levels, of which 2 are severe damage types and 3 are minor damage types.

[0056] S302. Based on the number of each type of damage level and the total number of all damage levels, determine the probability of occurrence of each type of damage level corresponding to the actual landslide impact force of the target.

[0057] Specifically, the probability of each damage level occurring is the number of each damage level divided by the total number of all damage levels. For example, as mentioned above, the probability of severe damage is 2 / 5, and the probability of minor damage is 3 / 5.

[0058] S303. Based on the occurrence probability of various damage levels and preset values, determine the over-damage probability of various damage levels corresponding to the actual landslide impact force of the target.

[0059] The preset value can be, for example, 1. Specifically, the probability of exceeding the damage level corresponding to the actual landslide impact force can be determined by using a preset method based on the probability of occurrence of various damage levels and the preset value.

[0060] For example, the probability of exceeding the damage threshold for a severe damage type can be determined using a preset method based on the occurrence probability of the aforementioned severe damage type and a preset value.

[0061] Optionally, determining the exceedance probability of each damage level corresponding to the actual landslide impact force in step S303 above, based on the occurrence probability of each damage level and preset values, may include: If the damage level is basically intact, then the probability of exceeding damage for the basically intact type is determined to be the difference between the preset value and the probability of occurrence of the basically intact type; whereby the probability of occurrence of the basically intact type is represented by, for example, P1, and the probability of exceeding damage for the basically intact type is 1-P1.

[0062] If the damage level is minor damage, calculate the sum of the occurrence probability of minor damage and the occurrence probability of minor damage, and determine the over-damage probability of minor damage as a preset value minus the difference of the sum; where the occurrence probability of minor damage is represented by, for example, P2, then the over-damage probability of minor damage is 1-P1-P2.

[0063] If the damage level is severe damage, the probability of exceeding the damage threshold for severe damage is determined based on the probability of occurrence of minor damage, basically intact, and severe damage, as well as a preset value. For example, if the probability of occurrence of severe damage is represented by P3, then the probability of exceeding the damage threshold for severe damage is 1-P1-P2-P3.

[0064] If the damage level is collapse damage type, then there is no probability of exceeding the damage limit for that collapse damage type.

[0065] Optionally, the above-mentioned S104, which involves nonlinearly fitting the actual landslide impact force of each target and the probability of exceeding the failure level corresponding to each actual landslide impact force, to construct a vulnerability curve model of the transmission tower during the landslide disaster process, may include: Specifically, the actual landslide impact force of each target is used as the independent variable, and the probability of exceeding the failure level corresponding to the actual landslide impact force of each target is used as the dependent variable for nonlinear fitting to obtain the vulnerability curve model. Figure 7 This is a schematic diagram illustrating the probability of occurrence of different damage levels, provided for an embodiment of this application. Specifically, it is obtained based on the actual landslide impact force of each target and the probability of occurrence of various damage levels corresponding to the actual landslide impact force of each target. Figure 8 This application provides a schematic diagram of a vulnerability curve, specifically obtained by nonlinear fitting based on the actual landslide impact force of each target and the probability of exceeding the failure level corresponding to each actual landslide impact force. Figure 8 This includes exceedance probability curves for different levels of damage, including the probability of occurrence of minor damage types under different landslide intensities, the probability of occurrence of severe damage types under different landslide intensities, and the probability of occurrence of collapse damage types under different landslides. Based on Figure 8 The exceedance probability curves for each damage level are obtained from the vulnerability curve fitting function table in Table 4 below.

[0066] Table 4

[0067] In Table 4 above, x refers to the actual landslide intensity.

[0068] Figure 9A schematic diagram of an apparatus for constructing a vulnerability curve model of a transmission tower, as provided in an embodiment of this application, is shown below. Figure 9 As shown, the device includes: The acquisition module 401 is used to acquire experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions. Each of the experimental data includes at least the experimental landslide impact force and the maximum horizontal displacement at the top of the experimental tower. The determination module 402 is used to determine the damage level of the scaled transmission tower model under various working conditions based on the maximum horizontal displacement at the top of each experimental tower and the preset damage level table. The damage level includes at least: basically intact, slightly damaged, severely damaged and collapsed. The preset damage level table is used to record the mapping relationship between the horizontal displacement range and the damage level. The determination module 402 is used to determine the probability of exceeding the damage level corresponding to each target's actual landslide impact force based on the experimental landslide impact force and the damage level under each working condition. Module 403 is used to perform nonlinear fitting on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to each actual landslide impact force, and to construct a vulnerability curve model of the transmission tower in the landslide disaster process. The vulnerability curve model is used to characterize the probability of the transmission tower being damaged by various damage levels under different landslide intensities.

[0069] Optionally, the determining module 402 is specifically used for: Based on Froude's similarity law, the experimental landslide impact force under each working condition is back-calculated to the actual landslide impact force of the transmission tower under each working condition; The intensity of each experimental landslide, the intensity range of each actual landslide, and the impact force of each target actual landslide are determined based on the preset experimental landslide impact force interval. Based on the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide, determine the probability of exceeding the damage level corresponding to each type of damage level of the actual landslide impact force for each target.

[0070] Optionally, the determining module 402 is specifically used for: Based on the Froude similarity law, the geometric similarity ratio of the landslide in the scaled-down transmission tower model, the density similarity ratio of the landslide, and the mass scaled-down ratio of the landslide, the impact force similarity ratio of the landslide is determined. Based on the similarity ratio of the impact force of landslides, the impact force of experimental landslides under each working condition is back-calculated into the impact force of each actual landslide.

[0071] Optionally, the determining module 402 is specifically used for: Determine the total number of all damage levels and the number of each type of damage level within the actual landslide intensity range; Based on the number of each damage level and the total number of all damage levels, determine the probability of occurrence of each damage level corresponding to the actual landslide impact force of the target. Based on the probability of occurrence of various damage levels and preset values, the probability of exceeding the damage level corresponding to the actual landslide impact force of the target is determined.

[0072] Optionally, the determining module 402 is specifically used for: If the damage level is basically intact, then the probability of exceeding damage for the basically intact type is determined to be the difference between the preset value and the probability of occurrence of the basically intact type. If the damage level is a minor damage type, then calculate the sum of the occurrence probability of the minor damage type and the occurrence probability of the minor damage type, and determine the over-damage probability of the minor damage type as the difference between the preset value and the sum; If the damage level is a severe damage type, then the probability of exceeding the damage threshold for the severe damage type is determined based on the probability of occurrence of the minor damage type, the probability of occurrence of the basically intact type, the probability of occurrence of the severe damage type, and the preset value.

[0073] Optionally, the construction module 403 is specifically used for: The vulnerability curve model is obtained by nonlinear fitting using the actual landslide impact force of each target as the independent variable and the probability of exceeding the failure level corresponding to each actual landslide impact force as the dependent variable.

[0074] Optionally, the vulnerability curve model includes the probability of occurrence of minor damage type under different landslide intensities, the probability of occurrence of severe damage type under different landslide intensities, and the probability of occurrence of collapse damage type under different landslides.

[0075] Figure 10 This is a structural block diagram of an electronic device 500 provided in an embodiment of this application. For example... Figure 10 As shown, the electronic device may include: processor 501 and memory 502.

[0076] Optionally, a bus 503 may also be included, wherein the memory 502 is used to store machine-readable instructions executable by the processor 501. When the electronic device 500 is running, the processor 501 and the memory 502 communicate via the bus 503, and the processor 501 executes the machine-readable instructions to perform the method steps in the above method embodiments.

[0077] This application also provides a computer-readable storage medium storing a computer program, which, when run by a processor, executes the method steps described in the above embodiment of the method for constructing a vulnerability curve model of a transmission tower.

[0078] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0079] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0080] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for constructing a vulnerability curve model for transmission towers, characterized in that, The method includes: Obtain experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions. Each experimental data includes at least the experimental landslide impact force and the maximum horizontal displacement at the top of the experimental tower. Based on the maximum horizontal displacement of the top of each experimental tower and the preset damage level table, the damage level of the scaled transmission tower model under each working condition is determined. The damage level includes at least: basically intact, slightly damaged, severely damaged and collapsed. The preset damage level table is used to record the mapping relationship between the horizontal displacement range and the damage level. Based on the experimental landslide impact force and the damage level under each working condition, the probability of exceeding the damage level corresponding to each target's actual landslide impact force is determined. Nonlinear fitting is performed on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to each actual landslide impact force to construct a vulnerability curve model of the transmission tower in the landslide disaster process. The vulnerability curve model is used to characterize the probability of the transmission tower being damaged by various damage levels under different landslide intensities.

2. The method for constructing a vulnerability curve model for transmission towers according to claim 1, characterized in that, The determination of the probability of exceeding the failure level corresponding to each target's actual landslide impact force, based on the experimental landslide impact force and the failure level under each working condition, includes: Based on Froude's similarity law, the experimental landslide impact force under each working condition is back-calculated to the actual landslide impact force of the transmission tower under each working condition; The intensity of each experimental landslide, the intensity range of each actual landslide, and the impact force of each target actual landslide are determined based on the preset experimental landslide impact force interval. Based on the damage level corresponding to each actual landslide impact force and the intensity range of each actual landslide, determine the probability of exceeding the damage level corresponding to each type of damage level of the actual landslide impact force for each target.

3. The method for constructing the vulnerability curve model of a transmission tower according to claim 2, characterized in that, The method of back-calculating the experimental landslide impact force under each working condition into the actual landslide impact force of the transmission tower under each working condition based on Froude's similarity law includes: Based on the Froude similarity law, the geometric similarity ratio of the landslide in the scaled-down transmission tower model, the density similarity ratio of the landslide, and the mass scaled-down ratio of the landslide, the impact force similarity ratio of the landslide is determined. Based on the similarity ratio of the impact force of landslides, the impact force of experimental landslides under each working condition is back-calculated into the impact force of each actual landslide.

4. The method for constructing a vulnerability curve model for transmission towers according to claim 2, characterized in that, The determination of the probability of exceeding the damage level corresponding to each target landslide impact force, based on the damage level under each actual landslide impact force and the intensity range of each actual landslide, includes: Determine the total number of all damage levels and the number of each type of damage level within the actual landslide intensity range; Based on the number of each damage level and the total number of all damage levels, determine the probability of occurrence of each damage level corresponding to the actual landslide impact force of the target. Based on the probability of occurrence of various damage levels and preset values, the probability of exceeding the damage level corresponding to the actual landslide impact force of the target is determined.

5. The method for constructing the vulnerability curve model of a transmission tower according to claim 4, characterized in that, The step of determining the exceedance probability of each damage level corresponding to the actual landslide impact force based on the occurrence probability of each damage level and preset values ​​includes: If the damage level is basically intact, then the probability of exceeding damage for the basically intact type is determined to be the difference between the preset value and the probability of occurrence of the basically intact type. If the damage level is a minor damage type, then calculate the sum of the occurrence probability of the minor damage type and the occurrence probability of the minor damage type, and determine the over-damage probability of the minor damage type as the difference between the preset value and the sum; If the damage level is a severe damage type, then the probability of exceeding the damage threshold for the severe damage type is determined based on the probability of occurrence of the minor damage type, the probability of occurrence of the basically intact type, the probability of occurrence of the severe damage type, and the preset value.

6. The method for constructing a vulnerability curve model for transmission towers according to claim 1, characterized in that, The method involves nonlinearly fitting the actual landslide impact force of each target and the probability of exceeding the failure level corresponding to each actual landslide impact force to construct a vulnerability curve model of the transmission tower during the landslide disaster process, including: The vulnerability curve model is obtained by nonlinear fitting using the actual landslide impact force of each target as the independent variable and the probability of exceeding the failure level corresponding to each actual landslide impact force as the dependent variable.

7. The method for constructing a vulnerability curve model for transmission towers according to claim 1, characterized in that, The vulnerability curve model includes the probability of occurrence of minor damage type under different landslide intensities, the probability of occurrence of severe damage type under different landslide intensities, and the probability of occurrence of collapse damage type under different landslides.

8. A device for constructing a vulnerability curve model of a transmission tower, characterized in that, include: The acquisition module is used to acquire experimental data of a scaled-down transmission tower model under multiple different landslide impact conditions. Each of the experimental data includes at least the experimental landslide impact force and the maximum horizontal displacement at the top of the experimental tower. The determination module is used to determine the damage level of the scaled transmission tower model under various working conditions based on the maximum horizontal displacement at the top of each experimental tower and a preset damage level table. The damage level includes at least: basically intact, slightly damaged, severely damaged, and collapsed. The preset damage level table is used to record the mapping relationship between the horizontal displacement range and the damage level. The determination module is used to determine the probability of exceeding the damage level corresponding to the actual landslide impact force of each target based on the experimental landslide impact force and the damage level under each working condition. A construction module is used to perform nonlinear fitting on the actual landslide impact force of each target and the probability of exceeding the damage level corresponding to each actual landslide impact force, and to construct a vulnerability curve model of the transmission tower during the landslide disaster process. The vulnerability curve model is used to characterize the probability of the transmission tower experiencing damage of various damage levels under different landslide intensities.

9. An electronic device, characterized in that, The method includes a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to implement the steps of the method for constructing a vulnerability curve model of a transmission tower as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method for constructing a vulnerability curve model of a transmission tower as described in any one of claims 1-7.

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