Containment concrete temperature strain correction method, device, equipment and medium

Abstract

The application provides a containment concrete temperature strain correction method, device, equipment and medium, and relates to the technical field of nuclear power containment concrete strain correction. The method comprises the following steps: collecting temperature information and strain information of the containment to form a sample set; selecting a preset period of sample sets to form an analysis sample set; based on the assumption that the temperature of the containment cylinder is linearly distributed, the circumferential strain and vertical strain caused by temperature change are obtained; the analysis sample set is fitted by least squares nonlinear fitting to obtain the thermal expansion coefficient temperature correction coefficient of the concrete; and the thermal expansion coefficient and temperature correction coefficient of the concrete obtained are substituted into the formula to obtain the circumferential strain and vertical strain caused by temperature change. The method can accurately evaluate the safety index of the containment, master the actual state of the containment, and optimize the maintenance cost and resources.

Description

Technical Field

[0001] This application relates to the field of nuclear power plant containment concrete strain correction technology, and in particular to a method, apparatus, equipment and medium for correcting temperature strain in containment concrete. Background Technology

[0002] As the third safety barrier in nuclear power plants, the containment vessel's structural integrity is directly related to the safe operation of the nuclear facility. To verify the containment vessel's sealing and load-bearing capacity under design baseline accident conditions, nuclear safety requires that structural integrity tests be conducted periodically before it is put into operation and during its service life.

[0003] However, as a two-way prestressed concrete cylindrical structure, the containment vessel may experience prestress loss due to prestressing tendon relaxation and concrete shrinkage and creep during long-term service, potentially causing key test indicators to exceed design thresholds. To assess the prestress loss state in real time, measuring instruments such as force gauges, strain sensors, and thermocouples are used in engineering. The strain signal collected by the embedded strain sensor is a coupling of the shrinkage and creep effects of concrete with the thermal expansion effect caused by changes in ambient temperature. Accurately separating temperature strain becomes a key issue in evaluating the performance and integrity of the containment vessel structure. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and medium for correcting temperature strain in containment concrete to solve the technical problem of being unable to accurately separate temperature strain in containment concrete.

[0005] A first aspect of this application provides a method for correcting temperature strain in containment concrete, the method comprising:

[0006] Collect temperature and strain information from the containment vessel to form a sample set; Select a sample set for a preset period to form an analysis sample set; Based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, the circumferential strain caused by temperature change is obtained. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at that location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given moment; The coefficient of thermal expansion of concrete was obtained by using least-squares nonlinear fitting on the analyzed sample set. Temperature correction factor ; The obtained thermal expansion coefficient of concrete and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

[0007] In an exemplary embodiment of this application, the method includes: The thermal expansion coefficient α and temperature correction coefficient δ of concrete obtained from the analysis sample set of the preset period are used to correct the strain of the containment concrete in the next preset period. The thermal expansion coefficient α and temperature correction coefficient δ of concrete are corrected using the analysis sample set of the next preset period, and the strain of the containment concrete in the next preset period is corrected using the corrected thermal expansion coefficient α and temperature correction coefficient δ of concrete.

[0008] In an exemplary embodiment of this application, the selection of the preset period includes: Calculate the shrinkage and creep values ​​of the containment structure; The years in which the annual shrinkage and annual creep values ​​of the containment are both less than their respective preset thresholds are selected as the preset period.

[0009] In an exemplary embodiment of this application, selecting a sample set for a preset period to form an analysis sample set includes: Select a sample set with a preset period as the initial sample set; Linear fitting was performed on the temperature along the wall thickness at different orientations of the containment. The data in the initial sample set with a goodness of fit not less than the goodness of fit limit are selected to form the analysis sample set.

[0010] In an exemplary embodiment of this application, temperature and strain information of the containment vessel are collected to form a sample set, including: The containment cross section is divided into multiple regions, and monitoring points are arranged in each region; A sample set is formed by collecting information from monitoring points at different locations within the containment vessel.

[0011] In an exemplary embodiment of this application, temperature and strain information of the containment vessel are collected to form a sample set, including: The thickness of the containment structure is divided into multiple zones, and monitoring points are placed in each zone. A sample set is formed by collecting monitoring points of different thicknesses in the containment vessel. Monitoring points closer to the outer side of the containment vessel are designated as outer monitoring points, and monitoring points closer to the inner side of the containment vessel are designated as inner monitoring points.

[0012] In an exemplary embodiment of this application, the coefficient of thermal expansion of concrete is obtained based on the sample set formed by each monitoring point. Temperature correction factor Temperature correction is performed on the concrete strain at each monitoring point.

[0013] A second aspect of this application provides a containment concrete temperature strain correction device, the device comprising: The information acquisition module collects temperature and strain information of the containment vessel to form a sample set; The selection module selects a sample set for a preset period to form an analysis sample set; The strain acquisition module, based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, obtains the circumferential strain caused by temperature changes. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at that location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given moment; The coefficient acquisition module uses least-squares nonlinear fitting to obtain the thermal expansion coefficient of concrete from the analyzed sample set. Temperature correction factor ; The correction module obtains the coefficient of thermal expansion of the concrete. and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

[0014] A third aspect of this application provides an electronic device comprising one or more processors and a storage device, the storage device being used to store one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the containment concrete temperature strain correction method described above.

[0015] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer's processor, causes the computer to perform the containment concrete temperature strain correction method described in any one of the preceding claims.

[0016] In combination with existing technologies, the beneficial effects of this application are as follows: The strain signals collected by pre-embedded strain sensors are a result of the coupling between the shrinkage and creep effects of concrete and the thermal expansion effect caused by changes in ambient temperature. This makes it impossible to separate the concrete strain caused by shrinkage and creep. The containment concrete temperature strain correction method provided in this application obtains the concrete expansion coefficient and temperature correction coefficient by substituting the analyzed sample set into the formulas for temperature-induced circumferential and vertical strains. Then, the obtained concrete expansion coefficient and temperature correction coefficient are substituting into the formulas for temperature-induced circumferential and vertical strains to obtain the circumferential and vertical strains. This accurately separates the temperature-induced circumferential and vertical strains. By collecting the strain signals, temperature-induced circumferential strain, and temperature-induced vertical strain, the concrete strain caused by shrinkage and creep effects can be accurately separated, thereby accurately assessing the safety indicators of the containment, understanding the actual condition of the containment, and optimizing maintenance costs and resources. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] In the attached diagram: Figure 1 A schematic diagram of a method for correcting temperature strain in containment concrete according to an embodiment of this application; Figure 2 This is a front view schematic diagram of a containment temperature and strain sensor provided in one embodiment of this application; Figure 3 This is a schematic diagram of the planar arrangement of the containment temperature and strain sensors provided in one embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of the containment temperature and strain sensor provided in one embodiment of this application; Figure 5 This is a graph showing the variation of the lowest daily average temperature in an embodiment of this application; Figure 6 This is a graph showing the variation of the highest daily average temperature in an embodiment of this application; Figure 7 This is a time history diagram of the measured cylinder temperature at an azimuth of 36.8° east of north in the Nth year, provided in one embodiment of this application; Figure 8 This is a schematic diagram of the temperature strain before correction at an azimuth of 36.8° east of north in the Nth year, provided in one embodiment of this application; Figure 9 This is a schematic diagram of temperature strain correction at an azimuth of 36.8° east of north in the Nth year, provided in one embodiment of this application; Figure 10 This is a schematic diagram of temperature strain correction at an azimuth of 36.8° east of north in the N+1th year, provided in one embodiment of this application. Figure 11 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0022] It should be noted that the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of this application. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered as part of the scope of this application.

[0023] Please see Figure 1 , Figure 1 This paper presents a method for correcting the temperature strain of containment concrete. By substituting the analyzed sample set into the formulas for temperature-induced circumferential and vertical strains, the concrete expansion coefficient and temperature correction coefficient are obtained. These coefficients are then substituting into the formulas for temperature-induced circumferential and vertical strains to obtain the circumferential and vertical strains themselves. This allows for accurate separation of temperature-induced circumferential and vertical strains. By collecting strain signals, temperature-induced circumferential strain, and temperature-induced vertical strain, the concrete strain caused by shrinkage and creep effects can be accurately separated. This enables accurate assessment of the containment's safety indicators, understanding of its actual condition, and optimization of maintenance costs and resources. The specific steps of the containment concrete temperature strain correction method are as follows: Step S110: Collect temperature and strain information of the containment vessel to form a sample set.

[0024] Step S120: Select a sample set with a preset period to form an analysis sample set.

[0025] Step S130: Based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, obtain the circumferential strain caused by temperature change. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at that location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given time.

[0026] Step S140: Use least squares nonlinear fitting to obtain the thermal expansion coefficient of concrete from the analysis sample set. Temperature correction factor .

[0027] Step S150: Obtain the thermal expansion coefficient of the concrete. and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

[0028] In one embodiment, step S110 may include the following steps: Monitoring points are set at different orientations and cross-sectional depths of the containment vessel. Temperature sensors and strain sensors are pre-embedded at the monitoring points. Information from the monitoring points is collected by the temperature sensors and strain sensors to form a sample set.

[0029] For example, the containment cross section is divided into multiple equally divided regions, and monitoring points are arranged in each region. A sample set is formed by collecting information from monitoring points in different orientations within the containment.

[0030] By setting up monitoring points in each area, the containment can be monitored from different locations, and the overall condition of the containment can be monitored.

[0031] For example, the containment thickness is divided into multiple regions of equal thickness, and monitoring points are arranged in each region. A sample set is formed by collecting information from monitoring points of different thicknesses within the containment. Monitoring points closer to the outer side of the containment cylinder are designated as outer monitoring points, and monitoring points closer to the inner side of the containment cylinder are designated as inner monitoring points.

[0032] By monitoring different thicknesses of the containment, the radial temperature gradient distribution pattern of the containment can be obtained, and the overall condition of the containment can be monitored.

[0033] In some embodiments, the containment cross section is first divided into multiple equally divided azimuth regions, and each azimuth region is further divided into multiple smaller regions of equal thickness. By setting temperature sensors and strain sensors in each smaller region, information about each location of the containment can be obtained, making the sample set complete and accurate.

[0034] Each small area can be equipped with one or more temperature sensors and strain sensors, selected according to actual needs.

[0035] The temperature sensor and strain sensor are periodically sampled through the online acquisition system. The sampling interval can be set according to actual needs, such as 30 minutes, one hour, two hours, etc., and there is no limit to the specific sampling interval duration.

[0036] In some embodiments, when implementing step S120, the preset period can be selected from years with smaller annual shrinkage and creep values.

[0037] For example, the shrinkage and creep values ​​of the containment are calculated, and the years in which the annual shrinkage and creep values ​​of the containment are both less than their respective preset thresholds are selected as preset periods. For example, if the annual shrinkage and creep values ​​of year N are both less than their respective preset thresholds, then the data of year N is selected as the initial sample set.

[0038] In some embodiments, step S120, selecting a sample set for a preset period to form an analysis sample set, specifically includes the following steps: Select a sample set with a preset period as the initial sample set.

[0039] For example, if the annual shrinkage and creep values ​​in year N are both less than their respective preset thresholds, then the data from year N is selected as the initial sample set.

[0040] For example, when the prestressing tensioning of the containment vessel of a nuclear power plant has been completed for more than six years, the shrinkage and creep of the containment vessel have entered a stable stage. It can be assumed that within a shorter sampling period, such as one or two years, the strain is mainly caused by temperature changes. The internal temperature of the containment vessel is basically constant under normal operating conditions, while the external temperature is significantly affected by environmental factors such as sunlight and seasonal changes. The temperature distribution of the outer cylinder wall is referenced to the solar radiation temperature distribution pattern of the cooling tower cylinder wall, assuming a uniform distribution along the height of the cylinder, while exhibiting a non-uniform distribution along the circumference of the cylinder depending on the angle of sunlight.

[0041] The temperature at different orientations of the containment was linearly fitted along the wall thickness.

[0042] The data in the initial sample set with a goodness of fit not less than the goodness of fit limit are selected to form the analysis sample set.

[0043] The goodness-of-fit R² can be used to measure the linearity between temperature measurement data and the mean. The closer the goodness-of-fit R² is to 1, the more stable the temperature field is at that moment.

[0044] For example, determining the goodness-of-fit limit includes: The coverage rate meets the minimum azimuth preset threshold for the number of days and filters out trapezoidal distortion caused by short-term extreme weather events.

[0045] For example, the minimum azimuth coverage rate is greater than 80% for the number of days, thus ensuring the integrity of the annual data analysis.

[0046] Short-term extreme weather events, such as torrential rain and sudden cooling, or instantaneous strong sunlight, can distort the temperature gradient. By removing short-term extreme weather events, extreme data can be filtered out, ensuring the accuracy of the data.

[0047] For example, R²≥0.95 is selected as the criterion for linear distribution. During data analysis, monitoring data corresponding to R²≥0.95 are extracted daily to form an analysis sample set.

[0048] Although the annual changes in concrete shrinkage and creep are small, their cumulative effects over the service life cannot be ignored. Therefore, the correction coefficient obtained by fitting the monitoring data in year N will have a large error when used for temperature strain correction throughout the entire service life. The longer the service life, the greater the error.

[0049] In some embodiments, the method includes: The coefficient of thermal expansion of concrete obtained using a pre-set periodic analysis sample set and temperature correction factor The containment concrete strain is adjusted for the next preset cycle.

[0050] The thermal expansion coefficient α and temperature correction coefficient δ of concrete are corrected using the analysis sample set of the next preset period, and the strain of the containment concrete in the next preset period is corrected using the corrected thermal expansion coefficient α and temperature correction coefficient δ of concrete.

[0051] For example, the coefficient of thermal expansion of concrete obtained from the analysis sample set in year N. and temperature correction factor Temperature correction is applied to the containment concrete strain in year N+1.

[0052] The coefficient of thermal expansion of concrete obtained in year N was determined using the analytical sample set from year N+1. and temperature correction factor Make corrections, and then use the corrected coefficient of thermal expansion of the concrete. and temperature correction factor Temperature correction was applied to the containment concrete strain in year N+2.

[0053] By analyzing the thermal expansion coefficient of concrete and temperature correction factor Continuous updates are conducted to ensure the continuous optimization of the concrete strain-temperature correction effect, guarantee the optimization effect, improve the overall control of the containment status, and optimize maintenance resources.

[0054] In some embodiments, step S130 specifically includes the following: Strain gauge output signal The value is: (1) In the formula: —Coefficient of thermal expansion of steel wire; —Temperature change of the steel wire; —Concrete strain (including concrete shrinkage, creep, and temperature strain).

[0055] Based on the plane section assumption, the circumferential ( ) caused by the temperature gradient ) and vertical ( The constrained strain can be decomposed into: (2) In the formula: —Variable temperature Expansion strain of unconstrained concrete under action. ; —Mean expansion strain of concrete —Coefficient of thermal expansion of concrete.

[0056] Since the temperature across the cylinder cross-section follows a linear distribution, the temperature difference also follows a linear distribution, as calculated below: (3) In the formula: —The wall thickness at the initial moment of the monitoring points with a goodness of fit greater than 0.95. Temperature at that location; — Temperature changes at the innermost part of the shell at any given moment; — Temperature change at the outermost edge of the shell; h—wall thickness.

[0057] Substituting equation (3) into equation (2), we get: (4) The total circumferential and vertical concrete temperature strain is as follows: (5) Formula (5) is a simplified calculation formula. In actual engineering, due to factors such as the constraints of steel bars, prestressed tendons and steel linings, concrete cracking, and the discreteness of the concrete material itself, the concrete expansion coefficient at each monitoring point is different, and the constraints at each monitoring point are also different. Therefore, the theoretical calculation formula of formula (5) is modified as follows: (6) In the formula: , This is the constraint effect correction factor.

[0058] In some embodiments, the coefficient of thermal expansion of concrete can be obtained by using a MATLAB program to perform least-squares nonlinear fitting on the analyzed samples of the sample set. Temperature correction factor .

[0059] By obtaining the thermal expansion coefficient of concrete and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain Then, the circumferential strain caused by temperature change is utilized. and vertical strain Corrections are made to the containment concrete strain to eliminate the effect of temperature on containment concrete strain, enabling an accurate assessment of the current state of the containment.

[0060] In some embodiments, the containment concrete is provided with multiple monitoring points. For example, monitoring points are set at different orientations and different cross-sectional depths of the containment. Temperature sensors and strain sensors are pre-embedded at the monitoring points, and information at the monitoring points is collected by the temperature sensors and strain sensors to form a sample set.

[0061] The coefficient of thermal expansion of concrete was obtained based on the sample set formed at each monitoring point. Temperature correction factor Temperature correction is performed on the concrete strain at each monitoring point.

[0062] By applying temperature correction to the concrete strain at each monitoring point, we can gain a more accurate understanding of the actual strain of the concrete in each area of ​​the containment, thereby improving the accuracy of the containment condition assessment.

[0063] Please see Figures 2 to 4 In some embodiments, temperature sensors and strain sensors are installed at different locations and thicknesses within the containment shell, with a sampling interval of 2 hours, a prestressing tensioning end time of more than 6 years, and a sampling period of 2 years.

[0064] Please see Figure 5 and Figure 6 Linear analysis was performed using 24-hour continuous monitoring data from the day with the lowest annual average temperature (February 6) and the day with the highest annual average temperature (August 3). The radial temperature gradient distribution of the monitoring data at an azimuth of 36.8° east of north approximately conforms to a linear law.

[0065] A program was developed using MATLAB software to perform linear fitting on temperatures at different azimuths, and the corresponding goodness-of-fit (R²) was obtained. The goodness-of-fit for the azimuth of 36.8° east of north is shown in Table 1. Considering the requirement of a minimum azimuth coverage rate of more than 80% of days to ensure the integrity of the annual data analysis, and to filter out gradient distortion caused by short-term extreme weather events (such as heavy rain and sudden cooling, and instantaneous strong sunlight), R² ≥ 0.95 was selected as the criterion for linear distribution. During data analysis, monitoring data corresponding to R² ≥ 0.95 were extracted on a daily basis.

[0066] Table 1. Statistics on the proportion of goodness of fit

[0067] Strain monitoring data from a continuous period of one year (year N) with a start time at least 6 years from the end of prestressing tensioning were selected. Data at an azimuth of 36.8° east of north were fitted to obtain the corresponding goodness of fit. The fitting coefficients for the azimuth of 36.8° east of north are shown in Table 2. The measured concrete strain was subtracted from the temperature-induced concrete strain to correct for temperature strain. The results before and after correction at the azimuth of 36.8° east of north are shown in Table 2. Figure 8 and Figure 9 .Depend on Figure 8 and Figure 9 It can be seen that the data after correcting for concrete temperature strain can more accurately assess the actual state of the containment concrete.

[0068] Table 2. Fitting coefficients for temperature data at a point 36.8° east of north for a given year N.

[0069] Using the fitting coefficients in Table 2, temperature strain correction was applied to the strain monitoring data for year N+1. The corrected results are as follows. Figure 10 , Figure 10 The data, after correction for concrete temperature strain, demonstrates that the actual condition of containment concrete can be assessed more accurately.

[0070] A second aspect of this application provides a containment concrete temperature strain correction device, the device comprising: The information acquisition module collects temperature and strain information of the containment vessel to form a sample set; The selection module selects a sample set for a preset period to form an analysis sample set; The strain acquisition module, based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, obtains the circumferential strain caused by temperature changes. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at that location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given moment; The coefficient acquisition module uses least-squares nonlinear fitting to obtain the thermal expansion coefficient of concrete from the analyzed sample set. Temperature correction factor ; The correction module obtains the coefficient of thermal expansion of the concrete. and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

[0071] It should be noted that the containment concrete temperature strain correction device and the containment concrete temperature strain correction method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the containment concrete temperature strain correction device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0072] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the containment concrete temperature strain correction method provided in the above embodiments.

[0073] Figure 11 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 11 The computer system 1100 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0074] like Figure 11As shown, the computer system 1100 includes a Central Processing Unit (CPU) 1101, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 1102 or programs loaded from storage portion 1108 into Random Access Memory (RAM) 1103, such as performing the methods described in the above embodiments. Various programs and data required for system operation are also stored in RAM 1103. The CPU 1101, ROM 1102, and RAM 1103 are interconnected via bus 1104. An Input / Output (I / O) interface 1105 is also connected to bus 1104.

[0075] The following components are connected to I / O interface 1105: an input section 1106 including a keyboard, mouse, etc.; an output section 1107 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1108 including a hard disk, etc.; and a communication section 1109 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1109 performs communication processing via a network such as the Internet. A drive 1110 is also connected to I / O interface 1105 as needed. Removable media 1111, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1110 as needed so that computer programs read from them can be installed into storage section 1108 as needed.

[0076] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1109, and / or installed from removable medium 1111. When the computer program is executed by central processing unit (CPU) 1101, it performs various functions defined in the system of this application.

[0077] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0078] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0079] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0080] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a computer's processor, causes the computer to perform the containment concrete temperature strain correction method as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.

[0081] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the containment concrete temperature strain correction method provided in the various embodiments described above.

[0082] Therefore, this application effectively overcomes some practical problems in the prior art, thus having high utilization value and practical significance.

[0083] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for correcting temperature strain in containment concrete, characterized in that, The method includes: Collect temperature and strain information from the containment vessel to form a sample set; Select a sample set for a preset period to form an analysis sample set; Based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, the circumferential strain caused by temperature change is obtained. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at the location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given moment; The coefficient of thermal expansion of concrete was obtained by using least-squares nonlinear fitting on the analyzed sample set. Temperature correction factor ; The obtained thermal expansion coefficient of concrete and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

2. The method for correcting temperature strain in containment concrete according to claim 1, characterized in that, The method includes: The thermal expansion coefficient α and temperature correction coefficient δ of concrete obtained from the analysis sample set of the preset period are used to correct the strain of the containment concrete in the next preset period. The thermal expansion coefficient α and temperature correction coefficient δ of concrete are corrected using the analysis sample set of the next preset period, and the strain of the containment concrete in the next preset period is corrected using the corrected thermal expansion coefficient α and temperature correction coefficient δ of concrete.

3. The method for correcting temperature strain in containment concrete according to claim 1, characterized in that, The selection of the preset period includes: Calculate the shrinkage and creep values ​​of the containment structure; The years in which the annual shrinkage and annual creep values ​​of the containment are both less than their respective preset thresholds are selected as the preset period.

4. The method for correcting temperature strain in containment concrete according to claim 1, characterized in that, Select a sample set for a preset period to form an analysis sample set, including: Select a sample set with a preset period as the initial sample set; Linear fitting was performed on the temperature along the wall thickness at different orientations of the containment. The data in the initial sample set with a goodness of fit not less than the goodness of fit limit are selected to form the analysis sample set.

5. The method for correcting temperature strain in containment concrete according to claim 1, characterized in that, Temperature and strain information of the containment vessel is collected to form a sample set, including: The containment cross section is divided into multiple zones, and monitoring points are arranged in each zone; A sample set is formed by collecting information from monitoring points at different locations within the containment vessel.

6. The method for correcting temperature strain in containment concrete according to claim 5, characterized in that, Temperature and strain information of the containment vessel is collected to form a sample set, including: The thickness of the containment structure is divided into multiple zones, and monitoring points are placed in each zone. A sample set is formed by collecting monitoring points of different thicknesses in the containment vessel. Monitoring points closer to the outer side of the containment vessel are designated as outer monitoring points, and monitoring points closer to the inner side of the containment vessel are designated as inner monitoring points.

7. The method for correcting temperature strain in containment concrete according to claim 6, characterized in that, The coefficient of thermal expansion of concrete was obtained based on the sample set formed at each monitoring point. Temperature correction factor Temperature correction is performed on the concrete strain at each monitoring point.

8. A containment concrete temperature strain correction device, characterized in that, The device includes: The information acquisition module collects temperature and strain information of the containment vessel to form a sample set; The selection module selects a sample set for a preset period to form an analysis sample set; The strain acquisition module, based on the assumption that the planar cross-section of the containment shell and the temperature follow a linear distribution, obtains the circumferential strain caused by temperature changes. and vertical strain : = = ,in, It is the coefficient of thermal expansion of concrete; It is a temperature correction factor; Wall thickness Temperature changes at the location; yes Temperature changes at the innermost part of the shell at any given moment; yes Temperature changes on the outermost side of the shell at any given moment; The coefficient acquisition module uses least-squares nonlinear fitting to obtain the thermal expansion coefficient of concrete from the analyzed sample set. Temperature correction factor ; The correction module obtains the coefficient of thermal expansion of the concrete. and temperature correction factor Substituting into the formula, we obtain the circumferential strain caused by temperature change. and vertical strain And utilize the circumferential strain caused by temperature changes and vertical strain Correction is made for the strain of the containment concrete.

9. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the containment concrete temperature strain correction method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by the computer's processor, causes the computer to perform the containment concrete temperature strain correction method according to any one of claims 1 to 7.

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