Seismic damage assessment method, device and equipment for large-span spatial grid structures

Abstract

The present application discloses a method, device and equipment for earthquake damage assessment of large-span spatial grid structures, and relates to the technical field of structural earthquake damage assessment. The earthquake damage assessment method includes constructing a finite element model of the large-span spatial grid structure to be assessed; using an artificially simulated earthquake acceleration time history curve and a target earthquake acceleration time history curve to perform time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method, respectively, to obtain the maximum elastic vertical displacement, quasi-collapse displacement, quasi-collapse cumulative plastic energy consumption, target maximum vertical displacement and first structure cumulative plastic energy consumption; calculating the damage index of the large-span spatial grid structure to be assessed, and determining the damage level corresponding to the damage index. The use of the method of the present application can effectively improve accuracy, unify standards, and expand the scope of application.

Description

Technical Field

[0001] The present application relates to the technical field of structural seismic damage assessment, and in particular to a seismic damage assessment method, device and equipment for large-span spatial grid structures. Background Art

[0002] A long-span spatial grid structure is a three-dimensional load-bearing system composed of geometrically ordered rods. It is primarily used to cover long-span, column-free spaces and features lightweight construction, high stiffness, and strong load-bearing capacity. Regular inspection and maintenance of long-span spatial grid structures is a prerequisite for ensuring structural safety and proper service life, and accurate assessment of structural performance damage is fundamental.

[0003] At present, relevant technologies use characteristic response parameters such as internal forces of members and unit strain energy for qualitative evaluation. However, the force form of large-span spatial grid structures is complex and the nonlinear effect is prominent. This method has low accuracy, is not universal and unified, and its physical meaning is not intuitive and clear, making it difficult to directly apply in actual engineering. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the related art, it is desired to provide a seismic damage assessment method, device and equipment for large-span spatial grid structures, which can quantitatively assess structural seismic damage, improve accuracy and have strong applicability.

[0005] In a first aspect, the present application provides a seismic damage assessment method for a large-span spatial grid structure, the seismic damage assessment method comprising:

[0006] Construct a finite element model of the large-span spatial grid structure to be evaluated;

[0007] Using an artificially simulated earthquake acceleration time history curve and performing an artificially simulated earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method, the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated are obtained, and the artificially simulated earthquake acceleration time history curve matches the site information of the large-span spatial grid structure to be evaluated;

[0008] Using the target earthquake acceleration time history curve, and using the adaptive dynamic incremental time history analysis method to perform a target earthquake acceleration time history analysis on the finite element model, the target maximum vertical displacement and the first structure accumulated plastic energy dissipation of the large-span spatial grid structure to be evaluated are obtained;

[0009] Based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement and the first structural cumulative plastic energy dissipation, a damage index of the large-span spatial grid structure to be evaluated is calculated, and a damage level corresponding to the damage index is determined.

[0010] Optionally, in some embodiments of the present application, the maximum elastic vertical displacement is obtained by the following steps:

[0011] Acquire a first search interval and a first search tolerance of the seismic peak acceleration set in the operation interface, and calculate a first search value according to the first search interval and the first search tolerance;

[0012] Inputting the artificially simulated earthquake acceleration time history curve corresponding to the first search value into the finite element model to perform elastic-plastic time history analysis, and calculating the accumulated plastic energy dissipation of the second structure;

[0013] If the accumulated plastic energy dissipation of the second structure is zero, the first search interval is updated to the second search interval, or if the accumulated plastic energy dissipation of the second structure is greater than zero, the first search interval is updated to the third search interval; wherein, when a first difference between the upper limit of the updated first search interval and the lower limit of the first search interval is less than or equal to the first search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the first search interval is input into the finite element model for elastic-plastic time history analysis, and the maximum elastic vertical displacement is searched for.

[0014] Alternatively, when the first difference is greater than the first search tolerance, a second search value is calculated based on the updated search interval and the first search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the second search value is input into the finite element model for elastic-plastic time history analysis until the maximum elastic vertical displacement is searched.

[0015] Optionally, in some embodiments of the present application, the cumulative plastic energy consumption of the second structure is obtained by calculating the sum of the cumulative plastic energy consumption of all components in the large-span spatial grid structure to be evaluated; wherein the cumulative plastic energy consumption of each component is It is obtained by the following formula:

[0016] ;

[0017] In the above formula, Indicates the total number of loading steps, Indicates the The stress of the step component element, Indicates the The plastic strain increment of the step component element, Represents the volume of the component unit.

[0018] Optionally, in some embodiments of the present application, the first search value and the second search value are both obtained by the following formula:

[0019] ;

[0020] In the above formula, Represents the search value, ; () indicates rounding down the decimals. Indicates the first search tolerance.

[0021] Optionally, in some embodiments of the present application, the quasi-collapse displacement and the quasi-collapse accumulated plastic energy dissipation are obtained by the following steps:

[0022] Obtaining a fourth search interval and a second search tolerance of the seismic peak acceleration set in the operation interface, and calculating a third search value based on the fourth search interval and the second search tolerance;

[0023] Inputting the artificially simulated earthquake acceleration time history curve corresponding to the third search value into the finite element model to perform elastic-plastic time history analysis, and calculating a first maximum vertical displacement;

[0024] If the first maximum vertical displacement is less than the second maximum vertical displacement, the fourth search interval is updated to the fifth search interval, or if the first maximum vertical displacement is greater than or equal to the second maximum vertical displacement, the fourth search interval is updated to the sixth search interval; wherein, the second maximum vertical displacement is obtained by inputting the artificially simulated earthquake acceleration time history curve corresponding to the preset peak acceleration into the finite element model for elastic time history analysis; when the second difference between the upper limit of the updated second search interval and the lower limit of the second search interval is less than or equal to the second search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the second search interval is input into the finite element model for elastic-plastic time history analysis, the quasi-collapse displacement is searched for, and the quasi-collapse cumulative plastic energy dissipation is calculated,

[0025] Alternatively, when the second difference is greater than the second search tolerance, a fourth search value is calculated based on the updated search interval and the second search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the fourth search value is input into the finite element model for elastic-plastic time history analysis until the quasi-collapse displacement is searched and the quasi-collapse cumulative plastic energy dissipation is calculated.

[0026] Optionally, the damage index of the large-span spatial grid structure to be evaluated in some embodiments of the present application is It is obtained by the following formula:

[0027] ;

[0028] ;

[0029] In the above formula, represents the maximum vertical displacement of the target, represents the maximum elastic vertical displacement, represents the quasi-collapse displacement, represents the accumulated plastic energy dissipation of the first structure, It represents the accumulated plastic energy dissipation of quasi-collapse; represents the weight coefficient of the plastic energy dissipation term, , represents the comprehensive exponential coefficient of the displacement term, Represents the comprehensive index coefficient of plastic energy dissipation term.

[0030] Optionally, in some embodiments of the present application, the damage levels corresponding to the damage indicators include:

[0031] When the damage indicator When the damage level is intact; or when the damage index When the damage level is slightly damaged; or when the damage index is When the damage level is medium damage; or when the damage index is When the damage level is severe damage; or when the damage index When , the damage level is collapse damage; .

[0032] Optionally, the method in some embodiments of the present application further includes outputting the damage level via a chart or text.

[0033] In a second aspect, the present application provides a seismic damage assessment device for a large-span spatial grid structure, the seismic damage assessment device comprising:

[0034] A construction module is used to construct a finite element model of the large-span spatial grid structure to be evaluated;

[0035] A first analysis module is configured to use an artificially simulated earthquake acceleration time history curve and perform an artificially simulated earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method to obtain the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated, wherein the artificially simulated earthquake acceleration time history curve matches the site information of the large-span spatial grid structure to be evaluated;

[0036] The second analysis module is used to use the target earthquake acceleration time history curve and perform target earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method to obtain the target maximum vertical displacement of the large-span spatial grid structure to be evaluated and the accumulated plastic energy dissipation of the first structure;

[0037] A determination module is used to calculate the damage index of the large-span spatial grid structure to be evaluated based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement and the first structural cumulative plastic energy dissipation, and determine the damage level corresponding to the damage index.

[0038] In a third aspect, the present application provides an electronic device comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set or instruction set, and the instruction, program, code set or instruction set is loaded and executed by the processor to implement the steps of any one of the earthquake damage assessment methods described in the first aspect.

[0039] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0040] The embodiments of the present application provide a method, device and equipment for earthquake damage assessment of large-span spatial grid structures. A finite element model of the large-span spatial grid structure to be assessed is constructed, and then the finite element model is subjected to time-history analysis using an artificially simulated earthquake acceleration time-history curve and a target earthquake acceleration time-history curve, respectively. The artificially simulated earthquake acceleration time-history curve is matched with the site information of the large-span spatial grid structure to be assessed, and the simulated earthquake data and the target earthquake data are integrated to obtain intuitive data such as quantifiable maximum elastic vertical displacement, quasi-collapse displacement, quasi-collapse cumulative plastic energy consumption, target maximum vertical displacement and first structure cumulative plastic energy consumption. Based on this, the damage index of the large-span spatial grid structure to be assessed is efficiently calculated, and the damage level corresponding to the damage index is determined, thereby effectively improving the accuracy, unifying the standards and expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A schematic flow chart of a method for earthquake damage assessment of a large-span spatial grid structure provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a finite element model of a large-span spatial grid structure to be evaluated provided in an embodiment of the present application;

[0044] Figure 3 A structural block diagram of a seismic damage assessment device for large-span spatial grid structures provided in an embodiment of the present application;

[0045] Figure 4 This is a structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0048] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Figures 1 to 4 The seismic damage assessment method, device and equipment for large-span spatial grid structures provided in the embodiments of the present application are described in detail.

[0049] Please refer to Figure 1 , which is a flow chart of a method for earthquake damage assessment of a large-span spatial grid structure provided in an embodiment of the present application. The earthquake damage assessment method specifically includes the following steps:

[0050] S101: Construct a finite element model of the large-span spatial grid structure to be evaluated.

[0051] In some embodiments of the present application, the types of large-span spatial grid structures to be evaluated include but are not limited to single-layer lattice shell structures, grid structures, and truss structures. The finite element model can be as follows: Figure 2 shown.

[0052] S102: Using artificially simulated earthquake acceleration time history curves and conducting artificially simulated earthquake acceleration time history analysis on the finite element model through the adaptive dynamic incremental time history analysis method, the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated are obtained, and the artificially simulated earthquake acceleration time history curves are matched with the site information of the large-span spatial grid structure to be evaluated.

[0053] In some embodiments of the present application, the site information of the large-span spatial grid structure to be evaluated can be obtained according to the "Code for Seismic Design of Buildings" GB50011, which specifically includes information such as seismic fortification intensity, site category, design earthquake grouping, maximum value and characteristic period of horizontal earthquake influence coefficient, and the horizontal axis of the earthquake acceleration time history curve represents time, and the vertical axis represents acceleration.

[0054] In some embodiments of the present application, the maximum elastic vertical displacement of the large-span spatial grid structure to be evaluated is obtained. When , the first search interval and the first search tolerance of the earthquake peak acceleration set in the operation interface can be obtained first, and the first search value can be calculated based on the first search interval and the first search tolerance. For example, the first search interval is [ , ], the first search tolerance is , and is the acceleration value, then the first search value for:

[0055] (1)

[0056] In formula (1), () indicates rounding down the decimal point.

[0057] Next, the first search value ( ) The corresponding artificial simulated earthquake acceleration time history curve is input into the finite element model for elastic-plastic time history analysis, and the accumulated plastic energy consumption of the second structure is calculated. , such as the accumulated plastic energy dissipation of the second structure By calculating the cumulative plastic energy dissipation of all components in the large-span spatial grid structure to be evaluated The sum of the components is obtained; among them, the cumulative plastic energy consumption of each component is Through formula (2), we can get:

[0058] (2)

[0059] In formula (2), Indicates the total number of loading steps, Indicates the The stress of the step component element, Indicates the The plastic strain increment of the step component element, Represents the volume of the component unit.

[0060] Furthermore, if the second structure accumulates plastic energy is zero, the first search interval [ , ]Update to the second search interval[ , ], or if the second structure accumulates plastic energy is greater than zero, the first search interval [ , ]Updated to the third search interval[ , ]. Wherein, when the first difference between the updated first search interval upper limit and the first search interval lower limit is less than or equal to the first search tolerance When the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the first search interval is input into the finite element model for elastic-plastic time history analysis, the maximum elastic vertical displacement is searched. , for example, the lower limit of the first search interval can be or , the corresponding upper limit of the first search interval can be or ; Or, when the first difference is greater than the first search tolerance When the updated search interval and the first search tolerance are The second search value is calculated and the artificially simulated earthquake acceleration time history curve corresponding to the second search value is input into the finite element model for elastic-plastic time history analysis until the maximum elastic vertical displacement is obtained. , for example, the updated search interval here can be the second search interval [ , ] or the third search interval [ , It should be noted that the upper limit and lower limit of the search interval are both acceleration values, and the second search value ( ) can also be obtained through formula (3), ,Right now:

[0061] (3).

[0062] In some embodiments of the present application, the quasi-collapse displacement of the large-span spatial grid structure to be evaluated is obtained. and quasi-collapse accumulated plastic energy When the fourth search interval and the second search tolerance of the earthquake peak acceleration set in the operation interface are obtained first, and the third search value is calculated based on the fourth search interval and the second search tolerance. For example, the fourth search interval is [ , ], the second search tolerance is , and is the acceleration value, then the third search value for:

[0063] (4).

[0064] Secondly, the third search value ( ) The corresponding artificial simulated earthquake acceleration time history curve is input into the finite element model for elastic-plastic time history analysis, the calculation results of all node displacements at each moment are obtained, and the first maximum vertical displacement is searched Furthermore, if the first maximum vertical displacement Less than the second maximum vertical displacement ,For example , then the fourth search interval [ , ]Updated to the fifth search interval[ , ], or if the first maximum vertical displacement Greater than or equal to the second maximum vertical displacement ,For example , then the fourth search interval [ , ]Updated to the sixth search interval[ , ]. Among them, the second maximum vertical displacement The artificially simulated earthquake acceleration time history curve corresponding to the preset peak acceleration is input into the finite element model for elastic time history analysis, for example, the preset peak acceleration .

[0065] When the second difference between the updated second search interval upper limit and the second search interval lower limit is less than or equal to the second search tolerance When the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the second search interval is input into the finite element model for elastic-plastic time history analysis, the displacement calculation results of all nodes at each moment are obtained, and the quasi-collapse displacement is searched. , and calculate the quasi-collapse cumulative plastic energy dissipation , for example, the lower limit of the second search interval can be or , the corresponding upper limit of the second search interval can be or ; Or, when the second difference is greater than the second search tolerance When the updated search interval and the second search tolerance are The fourth search value is obtained by calculation, and the artificial simulated earthquake acceleration time history curve corresponding to the fourth search value is input into the finite element model for elastic-plastic time history analysis until the quasi-collapse displacement is obtained. , and calculate the quasi-collapse cumulative plastic energy dissipation , for example, the updated search interval here can be the fifth search interval [ , ] or the sixth search interval [ , It should be noted that the upper limit and the lower limit of the search interval are both acceleration values. The calculation principles of the search value and the accumulated plastic energy are the same as above and will not be repeated here.

[0066] S103 , using the target earthquake acceleration time history curve and the adaptive dynamic incremental time history analysis method, a target earthquake acceleration time history analysis is performed on the finite element model to obtain the target maximum vertical displacement and the first structure accumulated plastic energy dissipation of the large-span spatial grid structure to be evaluated.

[0067] In some embodiments of the present application, the target earthquake acceleration time history curve can be a natural earthquake acceleration time history curve, that is, data collected from actual earthquakes. Obtain the displacement results of all nodes at each moment and search for the target maximum vertical displacement. During the process, When setting Similarly, the first structure accumulates plastic energy The calculation principle of is the same as above and will not be described in detail.

[0068] S104: Calculate the damage index of the large-span spatial grid structure to be evaluated based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement, and the first structure cumulative plastic energy dissipation, and determine the damage level corresponding to the damage index.

[0069] In some embodiments of the present application, the damage index of the large-span spatial grid structure to be evaluated is Through formula (5) and formula (6), we can get:

[0070] (5)

[0071] (6)

[0072] In formula (5) and formula (6), represents the maximum vertical displacement of the target, represents the maximum elastic vertical displacement, represents the quasi-collapse displacement, represents the accumulated plastic energy dissipation of the first structure, It represents the accumulated plastic energy dissipation of quasi-collapse; represents the weight coefficient of the plastic energy dissipation term, , represents the comprehensive exponential coefficient of the displacement term, Represents the comprehensive index coefficient of plastic energy consumption term, and The value of can be determined based on user experience or by performing parameterized analysis and fitting on this type of structure.

[0073] Furthermore, when the damage index When the damage index is When the damage index is When the damage index is When the damage level is severe damage; or when the damage index When , the damage level is collapse damage; , and The value of can be determined based on user experience or relevant specifications and references, such as , In addition, the embodiment of the present application can also output the damage level through charts or text, which is convenient, intuitive, and clear at a glance, meeting diverse usage needs.

[0074] The embodiment of the present application provides a seismic damage assessment method for large-span spatial grid structures. A finite element model of the large-span spatial grid structure to be assessed is constructed, and then the finite element model is subjected to time-history analysis using an artificially simulated earthquake acceleration time-history curve and a target earthquake acceleration time-history curve, respectively. The artificially simulated earthquake acceleration time-history curve is matched with the site information of the large-span spatial grid structure to be assessed, and the simulated earthquake data and the target earthquake data are integrated to obtain intuitive data such as quantifiable maximum elastic vertical displacement, quasi-collapse displacement, quasi-collapse cumulative plastic energy consumption, target maximum vertical displacement, and first structure cumulative plastic energy consumption. Based on this, the damage index of the large-span spatial grid structure to be assessed is efficiently calculated, and the damage level corresponding to the damage index is determined, thereby effectively improving the accuracy, unifying the standards, and expanding the scope of application.

[0075] Based on the above embodiments, the present invention provides a seismic damage assessment device for large-span space grid structures. The seismic damage assessment device 100 can be applied to Figures 1 to 2 In the earthquake damage assessment method of the corresponding embodiment. Please refer to Figure 3 , the earthquake damage assessment device 100 comprises:

[0076] A construction module 101 is used to construct a finite element model of a large-span spatial grid structure to be evaluated;

[0077] The first analysis module 102 is configured to use an artificially simulated earthquake acceleration time history curve and perform an artificially simulated earthquake acceleration time history analysis on the finite element model using an adaptive dynamic incremental time history analysis method to obtain the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated, and match the artificially simulated earthquake acceleration time history curve with the site information of the large-span spatial grid structure to be evaluated;

[0078] The second analysis module 103 is configured to use the target earthquake acceleration time history curve and perform target earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method to obtain the target maximum vertical displacement of the large-span spatial grid structure to be evaluated and the accumulated plastic energy dissipation of the first structure;

[0079] The determination module 104 is used to calculate the damage index of the large-span spatial grid structure to be evaluated based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement and the first structure cumulative plastic energy dissipation, and determine the damage level corresponding to the damage index.

[0080] Optionally, in some embodiments of the present application, the first analysis module 102 is specifically configured to obtain a first search interval and a first search tolerance of the seismic peak acceleration set in the operation interface, and calculate a first search value based on the first search interval and the first search tolerance;

[0081] The artificially simulated earthquake acceleration time history curve corresponding to the first search value is input into the finite element model for elastic-plastic time history analysis to calculate the accumulated plastic energy dissipation of the second structure;

[0082] If the accumulated plastic energy dissipation of the second structure is zero, the first search interval is updated to the second search interval, or if the accumulated plastic energy dissipation of the second structure is greater than zero, the first search interval is updated to the third search interval; wherein, when the first difference between the upper limit of the updated first search interval and the lower limit of the first search interval is less than or equal to the first search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the first search interval is input into the finite element model for elastic-plastic time history analysis, and the maximum elastic vertical displacement is searched.

[0083] Alternatively, when the first difference is greater than the first search tolerance, a second search value is calculated based on the updated search interval and the first search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the second search value is input into the finite element model for elastic-plastic time history analysis until the maximum elastic vertical displacement is obtained.

[0084] Optionally, in some embodiments of the present application, the first analysis module 102 is further specifically configured to obtain the cumulative plastic energy of the second structure by calculating the sum of the cumulative plastic energy of all components in the large-span spatial grid structure to be evaluated; wherein the cumulative plastic energy of each component is It is obtained by the following formula:

[0085] ;

[0086] In the above formula, Indicates the total number of loading steps, Indicates the The stress of the step component element, Indicates the The plastic strain increment of the step component element, Represents the volume of the component unit.

[0087] Optionally, in some embodiments of the present application, the first search value and the second search value are both obtained by the following formula:

[0088] ;

[0089] In the above formula, Represents the search value, ; () indicates rounding down the decimal point. Indicates the first search tolerance.

[0090] Optionally, in some embodiments of the present application, the first analysis module 102 is specifically configured to obtain a fourth search interval and a second search tolerance of the seismic peak acceleration set in the operation interface, and calculate a third search value based on the fourth search interval and the second search tolerance;

[0091] The artificially simulated earthquake acceleration time history curve corresponding to the third search value is input into the finite element model for elastic-plastic time history analysis to calculate the first maximum vertical displacement;

[0092] If the first maximum vertical displacement is less than the second maximum vertical displacement, the fourth search interval is updated to the fifth search interval, or if the first maximum vertical displacement is greater than or equal to the second maximum vertical displacement, the fourth search interval is updated to the sixth search interval; wherein, the second maximum vertical displacement is obtained by inputting the artificially simulated earthquake acceleration time history curve corresponding to the preset peak acceleration into the finite element model for elastic time history analysis; when the second difference between the upper limit of the updated second search interval and the lower limit of the second search interval is less than or equal to the second search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the second search interval is input into the finite element model for elastic-plastic time history analysis, the quasi-collapse displacement is searched, and the quasi-collapse cumulative plastic energy dissipation is calculated.

[0093] Alternatively, when the second difference is greater than the second search tolerance, the fourth search value is calculated based on the updated search interval and the second search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the fourth search value is input into the finite element model for elastic-plastic time history analysis until the quasi-collapse displacement is searched and the quasi-collapse cumulative plastic energy dissipation is calculated.

[0094] Optionally, in some embodiments of the present application, the damage index of the large-span spatial grid structure to be evaluated is It is obtained by the following formula:

[0095] ;

[0096] ;

[0097] In the above formula, represents the maximum vertical displacement of the target, represents the maximum elastic vertical displacement, represents the quasi-collapse displacement, represents the accumulated plastic energy dissipation of the first structure, It represents the accumulated plastic energy dissipation of quasi-collapse; represents the weight coefficient of the plastic energy dissipation term, , represents the comprehensive exponential coefficient of the displacement term, Represents the comprehensive index coefficient of plastic energy dissipation term.

[0098] Optionally, in some embodiments of the present application, the damage level corresponding to the damage indicator includes:

[0099] When the damage indicator When the damage level is intact; or when the damage index When the damage level is slightly damaged; or when the damage index is When the damage level is medium damage; or when the damage index is When the damage level is severe damage; or when the damage index When , the damage level is collapse damage; .

[0100] Optionally, in some embodiments of the present application, the determination module 104 is further configured to output the damage level via a chart or text.

[0101] It should be noted that, for the description of the same steps and contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0102] The embodiment of the present application provides a seismic damage assessment device for large-span spatial grid structures. A finite element model of the large-span spatial grid structure to be assessed is constructed, and then a time-history analysis is performed on the finite element model using an artificially simulated earthquake acceleration time-history curve and a target earthquake acceleration time-history curve, respectively. The artificially simulated earthquake acceleration time-history curve is matched with the site information of the large-span spatial grid structure to be assessed, and the simulated earthquake data and the target earthquake data are integrated to obtain intuitive data such as quantifiable maximum elastic vertical displacement, quasi-collapse displacement, quasi-collapse cumulative plastic energy consumption, target maximum vertical displacement, and first structure cumulative plastic energy consumption. Based on this, the damage index of the large-span spatial grid structure to be assessed is efficiently calculated, and the damage level corresponding to the damage index is determined, thereby effectively improving the accuracy, unifying the standards, and expanding the scope of application.

[0103] Based on the above embodiments, the present application provides an electronic device. Figure 4 The electronic device 200 may include a processor 201 and a memory 202. The memory 202 stores at least one instruction, at least one program, code set or instruction set, which is loaded and executed by the processor 201 to implement Figures 1 to 2 The steps of the earthquake damage assessment method of the corresponding embodiment.

[0104] As another aspect, the present invention provides a computer-readable storage medium for storing program code for executing the aforementioned Figures 1 to 2 Any implementation of the earthquake damage assessment method corresponding to the embodiment.

[0105] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] 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. For example, the device embodiments described above are merely schematic. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. On the other hand, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0107] In addition, the functional modules in the various embodiments of the present application may be integrated into a single processing unit, or each module may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated units may be implemented in the form of hardware or in the form of software functional units. If the integrated units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium.

[0108] Based on this understanding, the technical solution of this application, or the portion that contributes to the prior art, or all 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 instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the earthquake damage assessment method in each embodiment of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0109] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A seismic damage assessment method for large-span spatial grid structures, characterized in that: The earthquake damage assessment method comprises: Construct a finite element model of the large-span spatial grid structure to be evaluated; Using an artificially simulated earthquake acceleration time history curve and performing an artificially simulated earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method, the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated are obtained, and the artificially simulated earthquake acceleration time history curve matches the site information of the large-span spatial grid structure to be evaluated; Using the target earthquake acceleration time history curve, and using the adaptive dynamic incremental time history analysis method to perform a target earthquake acceleration time history analysis on the finite element model, the target maximum vertical displacement and the first structure accumulated plastic energy dissipation of the large-span spatial grid structure to be evaluated are obtained; Based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement and the first structural cumulative plastic energy dissipation, a damage index of the large-span spatial grid structure to be evaluated is calculated, and a damage level corresponding to the damage index is determined.

2. The earthquake damage assessment method according to claim 1, characterized in that: The maximum elastic vertical displacement is obtained by the following steps: Acquire a first search interval and a first search tolerance of the seismic peak acceleration set in the operation interface, and calculate a first search value according to the first search interval and the first search tolerance; Inputting the artificially simulated earthquake acceleration time history curve corresponding to the first search value into the finite element model to perform elastic-plastic time history analysis, and calculating the accumulated plastic energy dissipation of the second structure; If the accumulated plastic energy dissipation of the second structure is zero, the first search interval is updated to the second search interval, or if the accumulated plastic energy dissipation of the second structure is greater than zero, the first search interval is updated to the third search interval; wherein, when a first difference between the upper limit of the updated first search interval and the lower limit of the first search interval is less than or equal to the first search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the first search interval is input into the finite element model for elastic-plastic time history analysis, and the maximum elastic vertical displacement is searched for. Alternatively, when the first difference is greater than the first search tolerance, a second search value is calculated based on the updated search interval and the first search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the second search value is input into the finite element model for elastic-plastic time history analysis until the maximum elastic vertical displacement is searched.

3. The earthquake damage assessment method according to claim 2, characterized in that: The second structure cumulative plastic energy is obtained by calculating the sum of the cumulative plastic energy of all components in the large-span spatial grid structure to be evaluated; wherein the cumulative plastic energy of each component is It is obtained by the following formula: ； In the above formula, Indicates the total number of loading steps, Indicates the The stress of the step component element, Indicates the The plastic strain increment of the step component element, Represents the volume of the component unit.

4. The earthquake damage assessment method according to claim 3, characterized in that: The first search value and the second search value are both obtained by the following formula: ； In the above formula, Represents the search value, ; () indicates rounding down the decimal point. Indicates the first search tolerance.

5. The earthquake damage assessment method according to claim 1, characterized in that: The quasi-collapse displacement and the quasi-collapse accumulated plastic energy are obtained by the following steps: Obtaining a fourth search interval and a second search tolerance of the seismic peak acceleration set in the operation interface, and calculating a third search value based on the fourth search interval and the second search tolerance; Inputting the artificially simulated earthquake acceleration time history curve corresponding to the third search value into the finite element model to perform elastic-plastic time history analysis, and calculating a first maximum vertical displacement; If the first maximum vertical displacement is less than the second maximum vertical displacement, the fourth search interval is updated to the fifth search interval, or if the first maximum vertical displacement is greater than or equal to the second maximum vertical displacement, the fourth search interval is updated to the sixth search interval; wherein, the second maximum vertical displacement is obtained by inputting the artificially simulated earthquake acceleration time history curve corresponding to the preset peak acceleration into the finite element model for elastic time history analysis; when the second difference between the upper limit of the updated second search interval and the lower limit of the second search interval is less than or equal to the second search tolerance, the artificially simulated earthquake acceleration time history curve corresponding to the lower limit of the second search interval is input into the finite element model for elastic-plastic time history analysis, the quasi-collapse displacement is searched for, and the quasi-collapse cumulative plastic energy dissipation is calculated, Alternatively, when the second difference is greater than the second search tolerance, a fourth search value is calculated based on the updated search interval and the second search tolerance, and the artificially simulated earthquake acceleration time history curve corresponding to the fourth search value is input into the finite element model for elastic-plastic time history analysis until the quasi-collapse displacement is searched and the quasi-collapse cumulative plastic energy dissipation is calculated.

6. The earthquake damage assessment method according to any one of claims 1 to 5, characterized in that: The damage index of the large-span spatial grid structure to be evaluated It is obtained by the following formula: ； ； In the above formula, represents the maximum vertical displacement of the target, represents the maximum elastic vertical displacement, represents the quasi-collapse displacement, represents the accumulated plastic energy dissipation of the first structure, It represents the accumulated plastic energy dissipation of quasi-collapse; represents the weight coefficient of the plastic energy dissipation term, , represents the comprehensive exponential coefficient of the displacement term, Represents the comprehensive index coefficient of plastic energy dissipation term.

7. The earthquake damage assessment method according to claim 6, characterized in that: The damage levels corresponding to the damage indicators include: When the damage indicator When the damage level is intact; or when the damage index When the damage level is slightly damaged; or when the damage index is When the damage level is medium damage; or when the damage index is When the damage level is severe damage; or when the damage index When , the damage level is collapse damage; .

8. The earthquake damage assessment method according to claim 7, characterized in that: The method further includes outputting the damage level in a graphical or textual manner.

9. A seismic damage assessment device for large-span spatial grid structures, characterized in that: The earthquake damage assessment device comprises: A construction module is used to construct a finite element model of the large-span spatial grid structure to be evaluated; A first analysis module is configured to use an artificially simulated earthquake acceleration time history curve and perform an artificially simulated earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method to obtain the maximum elastic vertical displacement, quasi-collapse displacement, and quasi-collapse cumulative plastic energy dissipation of the large-span spatial grid structure to be evaluated, wherein the artificially simulated earthquake acceleration time history curve matches the site information of the large-span spatial grid structure to be evaluated; The second analysis module is used to use the target earthquake acceleration time history curve and perform target earthquake acceleration time history analysis on the finite element model through an adaptive dynamic incremental time history analysis method to obtain the target maximum vertical displacement of the large-span spatial grid structure to be evaluated and the accumulated plastic energy dissipation of the first structure; A determination module is used to calculate the damage index of the large-span spatial grid structure to be evaluated based on the maximum elastic vertical displacement, the quasi-collapse displacement, the quasi-collapse cumulative plastic energy dissipation, the target maximum vertical displacement and the first structural cumulative plastic energy dissipation, and determine the damage level corresponding to the damage index.

10. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set or instruction set, and the instruction, the program, the code set or the instruction set is loaded and executed by the processor to implement the steps of the earthquake damage assessment method described in any one of claims 1 to 8.

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