Stress value calculation method, device, equipment and readable storage medium

Abstract

The present invention provides a stress value calculation method, device, equipment and readable storage medium. The method comprises: in the current acquisition phase, obtaining the first temperature of the concrete surface at the test position and the distance between the two plates included in each group of plates at the test position measured by the rangefinder, the plates are fixed on the concrete surface at the test position; obtaining the first distance according to the distance between the two plates included in each group of plates; calculating the first distance difference between the first distance and the second distance, calculating the first temperature difference between the first temperature and the second temperature; calculating the first stress value according to the first distance difference, and correcting the first stress value according to the first temperature difference to obtain the second stress value. Through the present invention, only a rangefinder, a thermometer and several plates are needed to obtain the stress value at the test position according to the corresponding formula, which reduces the test cost, and the plates are fixed on the concrete surface, even if the plates are damaged, they are easy to replace, and the fault tolerance rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and in particular to a stress value calculation method, device, equipment and readable storage medium. Background Art

[0002] At present, the stress conditions of continuous rigid frame bridges during construction and after completion have always attracted much attention. Stress testing of PC continuous rigid frame bridges can help us understand the stress development of the main bridge at various stages, which is of great help for construction monitoring and scientific research.

[0003] In the related technology, the commonly used testing method is: testing based on various strain gauges, that is, fixing the strain gauge on the steel mesh before concrete pouring, and pouring it into the concrete during pouring, and then regularly carrying the strain collector to the bridge for data collection.

[0004] However, during the on-site steel bar welding, formwork erection, and pouring process, strain gauges and their signal lines are often damaged, resulting in abnormal readings or even no readings. Once the strain gauge at a measuring point is damaged, the measuring point is immediately invalid and difficult to remedy. In addition, from a cost perspective, it is expensive to use strain gauges to perform stress tests on large cross-border bridges. Summary of the invention

[0005] The main purpose of the present invention is to provide a stress value calculation method, device, equipment and readable storage medium, aiming to solve the problems of low fault tolerance and high cost of the test scheme of pouring strain gauges into concrete in the prior art.

[0006] In a first aspect, the present invention provides a method for calculating a stress value, comprising the following steps:

[0007] In the current acquisition phase, a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter are obtained, wherein the plates are fixed to the concrete surface at the test position;

[0008] Obtaining a first distance according to the distance between two plates included in each group of plates;

[0009] Calculating a first distance difference between the first distance and the second distance, and calculating a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained according to the distance between two plates included in each group of plates at the test position in the previous acquisition stage, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage;

[0010] A first stress value is calculated according to the first distance difference, and a second stress value is obtained by correcting the first stress value according to the first temperature difference.

[0011] Optionally, when the test position is at the bottom plate, the two plates included in each group of plates are arranged along a first direction, and the plates in each group are spaced apart along a second direction, wherein the first direction is the along-bridge direction, and the second direction is a direction perpendicular to the along-bridge direction.

[0012] Optionally, when the test position is at the mid-span web, the two plates included in each group of plates are arranged along the second direction, and the plates in each group are spaced apart along the first direction, wherein the first direction is the direction along the bridge, and the second direction is a direction perpendicular to the direction along the bridge.

[0013] Optionally, when the test position is at the 1 / 4 web of the mid-span, the test position includes six groups of plates, wherein the two plates included in the first group of plates are arranged along the first direction, the two plates included in the second group of plates are arranged along the third direction, the two plates included in the third group of plates are arranged along the fourth direction, the two plates included in the fourth group of plates are arranged along the fifth direction, the two plates included in the fifth group of plates are arranged along the sixth direction, and the two plates included in the sixth group of plates are arranged along the first direction, wherein the first direction is the direction along the bridge direction, the third direction is the direction of rotating the first direction clockwise by a first angle, the fourth direction is the direction of rotating the first direction counterclockwise by a first angle, the fifth direction is the direction of rotating the first direction counterclockwise by a first angle, and the sixth direction is the direction of rotating the first direction clockwise by a first angle;

[0014] The first group of panels includes panel 1 and panel 2, the second group of panels includes panel 2 and panel 3, the third group of panels includes panel 2 and panel 4, the fourth group of panels includes panel 3 and panel 5, the fifth group of panels includes panel 4 and panel 5, and the sixth group of panels includes panel 5 and panel 6.

[0015] Optionally, calculating the first stress value according to the first distance difference includes:

[0016] The strain value ε is obtained according to the strain value calculation formula ε=Δa / a, where a is the initial distance between two plates included in each group of plates, and Δa is the first distance difference;

[0017] The first stress value σ is obtained according to the stress value calculation formula σ=ε×E, where E is the elastic modulus of the concrete at the test position.

[0018] Optionally, the correcting the first stress value according to the first temperature difference to obtain a second stress value includes:

[0019] According to the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正, where α is the linear expansion coefficient of concrete at the test position, and Δt is the first temperature difference.

[0020] Optionally, after the step of calculating the first stress value according to the first distance difference and correcting the first stress value according to the first temperature difference to obtain the second stress value, the method further includes:

[0021] In the next acquisition phase, a third temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by the distance meter are obtained;

[0022] Obtaining a third distance according to the distance between two plates included in each group of plates at the test position;

[0023] Calculating a second distance difference between the third distance and the first distance, and calculating a second temperature difference between the third temperature and the first temperature;

[0024] A third stress value is calculated according to the second distance difference, and a fourth stress value is obtained by correcting the third stress value according to the second temperature difference;

[0025] An average value of the second stress value and the fourth stress value is calculated to obtain a fifth stress value.

[0026] In a second aspect, the present invention further provides a stress value calculation device, the stress value calculation device comprising:

[0027] An acquisition module: used for acquiring, in the current acquisition phase, a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter, wherein the plates are fixed on the concrete surface at the test position;

[0028] A confirmation module: used for obtaining a first distance according to a distance between two panels included in each group of panels;

[0029] A first calculation module: used to calculate a first distance difference between the first distance and the second distance, and to calculate a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained in the previous acquisition stage according to the distance between two plates included in each group of plates at the test position, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage;

[0030] A second calculation module is used to calculate a first stress value according to the first distance difference, and to correct the first stress value according to the first temperature difference to obtain a second stress value.

[0031] In a third aspect, the present invention also provides a stress value calculation device, which includes a processor, a memory, and a stress value calculation program stored in the memory and executable by the processor, wherein when the stress value calculation program is executed by the processor, the steps of the stress value calculation method as described above are implemented.

[0032] In a fourth aspect, the present invention further provides a readable storage medium, on which a stress value calculation program is stored, wherein when the stress value calculation program is executed by a processor, the steps of the stress value calculation method as described above are implemented.

[0033] In the present invention, in the current acquisition phase, the first temperature of the concrete surface at the test position and the distance between the two plates included in each group of plates at the test position measured by the rangefinder are obtained, and the plates are fixed on the concrete surface at the test position; the first distance is obtained according to the distance between the two plates included in each group of plates; the first distance difference between the first distance and the second distance is calculated, and the first temperature difference between the first temperature and the second temperature is calculated, wherein the second distance is obtained according to the distance between the two plates included in each group of plates at the test position in the previous acquisition phase, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition phase; the first stress value is calculated according to the first distance difference, and the first stress value is corrected according to the first temperature difference to obtain the second stress value. Through the present invention, only one rangefinder, one thermometer and several plates are needed to obtain the stress value at the test position according to the corresponding formula, which reduces the test cost, and the plates are fixed on the concrete surface, so even if the plates are damaged, they are easy to replace, and the fault tolerance rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the hardware structure of a stress value calculation device involved in an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the flow chart of the first embodiment of the stress value calculation method of the present invention;

[0036] Figure 3 It is a layout diagram of each group of panels when the test position is at the bottom plate in the present invention;

[0037] Figure 4 It is the arrangement diagram of each group of plates when the test position of the present invention is at the mid-span web;

[0038] Figure 5 The layout diagram of each group of plates when the test position of the present invention is at the 1 / 4 web of the mid-span;

[0039] Figure 6 It is a schematic diagram of functional modules of the first embodiment of the stress value calculation device of the present invention.

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0042] In a first aspect, an embodiment of the present invention provides a stress value calculation device, which may be a device having a data processing function, such as a personal computer (PC), a notebook computer, or a server.

[0043] Reference Figure 1 , Figure 1 Schematic diagram of the hardware structure of the stress value calculation device involved in the embodiment of the present invention. In the embodiment of the present invention, the stress value calculation device may include a processor 1001 (such as a central processing unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a wireless interface (such as wireless fidelity WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), such as a disk storage, and the memory 1005 may optionally be a storage device independent of the aforementioned processor 1001. Those skilled in the art will understand that Figure 1 The hardware structure shown in the figure does not constitute a limitation of the present invention, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0044] Continue to refer to Figure 1 , Figure 1 The memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a stress value calculation program. The processor 1001 may call the stress value calculation program stored in the memory 1005 and execute the stress value calculation method provided in the embodiment of the present invention.

[0045] In a second aspect, an embodiment of the present invention provides a method for calculating a stress value.

[0046] In one embodiment, referring to Figure 2 , Figure 2 FIG. 1 is a flow chart of the first embodiment of the stress value calculation method of the present invention. Figure 2 As shown, the stress value calculation method includes the following steps:

[0047] S10: in the current acquisition phase, obtaining a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter, wherein the plates are fixed to the concrete surface at the test position;

[0048] In this embodiment, the current acquisition stage is any stage after the initial stage in the bridge construction stage. The test position can be at the bottom plate and / or the middle web of the middle span and / or the 1 / 4 web of the middle span. When relevant data is collected during the bridge construction stage, data collection can be performed in the starting time period of the stage, or in the middle time period or the ending time period of the stage, or in any time period of the stage. Obtaining the first temperature of the concrete surface at the test position can be to obtain the temperature of the concrete surface at the test position after measuring with a thermometer. Obtaining the distance between the two plates included in each group of plates at the test position measured by the rangefinder can be measured with a handheld strain gauge or with an Invar baseline ruler. The plate is fixed on the concrete surface at the test position. The plate can be a steel plate, an aluminum plate, or a wooden plate. A hole can be set on the plate for use in distance measurement.

[0049] Further, in one embodiment, when the test position is at the bottom plate, the two plates included in each group of plates are arranged along a first direction, and the plates in each group are spaced apart along a second direction, wherein the first direction is the along-bridge direction, and the second direction is a direction perpendicular to the along-bridge direction.

[0050] In this embodiment, refer to Figure 3 , Figure 3 : is the layout diagram of each group of panels when the test position is at the bottom plate in the present invention. Figure 3 As shown, when the test position is at the bottom plate, the two plates included in each group of plates are arranged along the first direction, and the plates in each group are spaced apart along the second direction, wherein the first direction is the direction along the bridge direction, and the second direction is the direction perpendicular to the direction along the bridge direction. It is easy to understand that Figure 3 The number of panel groups shown in the figure is for reference only and is not limited here. The spacing Xmm between two panels included in each panel group may be 250mm.

[0051] Furthermore, in one embodiment, when the test position is at the mid-span web, the two plates included in each group of plates are arranged along the second direction, and the plates in each group are spaced apart along the first direction, wherein the first direction is the direction along the bridge, and the second direction is a direction perpendicular to the direction along the bridge.

[0052] In this embodiment, refer to Figure 4 , Figure 4 This is the layout diagram of each group of plates when the test position is at the mid-span web in the present invention, such as Figure 4 As shown, when the test position is at the mid-span web, the two plates included in each group of plates are arranged along the second direction, and the plates in each group are spaced apart along the first direction, wherein the first direction is the direction along the bridge, and the second direction is the direction perpendicular to the direction along the bridge. It is easy to understand that Figure 4 The number of panel groups shown in the figure is for reference only and is not limited here. The spacing Xmm between two panels included in each panel group may be 250mm.

[0053] Further, in one embodiment, when the test position is at the 1 / 4 web of the mid-span, the test position includes six groups of plates, wherein the two plates included in the first group of plates are arranged along the first direction, the two plates included in the second group of plates are arranged along the third direction, the two plates included in the third group of plates are arranged along the fourth direction, the two plates included in the fourth group of plates are arranged along the fifth direction, the two plates included in the fifth group of plates are arranged along the sixth direction, and the two plates included in the sixth group of plates are arranged along the first direction, wherein the first direction is the direction along the bridge direction, the third direction is the direction of rotating the first direction clockwise by a first angle, the fourth direction is the direction of rotating the first direction counterclockwise by a first angle, the fifth direction is the direction of rotating the first direction counterclockwise by a first angle, and the sixth direction is the direction of rotating the first direction clockwise by a first angle;

[0054] The first group of panels includes panel 1 and panel 2, the second group of panels includes panel 2 and panel 3, the third group of panels includes panel 2 and panel 4, the fourth group of panels includes panel 3 and panel 5, the fifth group of panels includes panel 4 and panel 5, and the sixth group of panels includes panel 5 and panel 6.

[0055] In this embodiment, refer to Figure 5 , Figure 5 This is the layout diagram of each group of plates when the test position is at the mid-span 1 / 4 web in the present invention, as shown in FIG. Figure 5As shown, when the test position is at the 1 / 4 web of the mid-span, the test position includes six groups of plates, wherein the two plates included in the first group of plates are arranged along the first direction, the two plates included in the second group of plates are arranged along the third direction, the two plates included in the third group of plates are arranged along the fourth direction, the two plates included in the fourth group of plates are arranged along the fifth direction, the two plates included in the fifth group of plates are arranged along the sixth direction, and the two plates included in the sixth group of plates are arranged along the first direction, wherein the first direction is the along-bridge direction, and the third direction is The direction of the first angle is clockwise rotation along the first direction, the fourth direction is counterclockwise rotation along the first direction, the fifth direction is counterclockwise rotation along the first direction, and the sixth direction is clockwise rotation along the first direction. The first group of panels includes panels 1 and 2, the second group of panels includes panels 2 and 3, the third group of panels includes panels 2 and 4, the fourth group of panels includes panels 3 and 5, the fifth group of panels includes panels 4 and 5, and the sixth group of panels includes panels 5 and 6. It is easy to understand that Figure 5 The distance Xmm between two plates included in each group of plates can be 250mm.

[0056] S20: Obtaining a first distance according to the distance between two plates included in each group of plates;

[0057] In this embodiment, when there is only one group of panels at the test position, the distance between the two panels included in the group is the first distance; when there are multiple groups of panels at the test position, the average distance between the two panels included in each group of panels is the first distance.

[0058] S30: Calculate a first distance difference between the first distance and the second distance, and calculate a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained in the previous acquisition stage according to the distance between two plates included in each group of plates at the test position, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage;

[0059] In this embodiment, the method for obtaining the second distance is the same as the method for obtaining the first distance, and the method for obtaining the second temperature is the same as the method for obtaining the first temperature. The first distance obtained in the current acquisition phase is subtracted from the second distance obtained in the previous acquisition phase to obtain the first distance difference between the two panels included in each group of panels at the test positions of the previous and subsequent phases. The first temperature obtained in the current acquisition phase is subtracted from the second temperature obtained in the previous acquisition phase to obtain the first temperature difference of the concrete surface at the test positions of the previous and subsequent phases.

[0060] S40: Calculate a first stress value according to the first distance difference, and correct the first stress value according to the first temperature difference to obtain a second stress value.

[0061] In this embodiment, the first stress value is first calculated according to the first distance difference, and then the first stress value is corrected according to the first temperature difference to obtain the second stress value.

[0062] Further, in one embodiment, the calculating the first stress value according to the first distance difference value includes:

[0063] The strain value ε is obtained according to the strain value calculation formula ε=Δa / a, where a is the initial distance between the two plates included in each group of plates, and Δa is the first distance difference; the first stress value σ is obtained according to the stress value calculation formula σ=ε×E, where E is the elastic modulus of concrete at the test position.

[0064] In this embodiment, the first distance difference Δa obtained in step S30 is substituted into the strain value calculation formula ε=Δa / a to obtain the strain value ε, where a is the initial distance between the two plates included in each group of plates, and the initial distance is set according to actual needs. Further, the strain value ε is substituted into the stress value calculation formula σ=ε×E to obtain the first stress value σ, where E is the elastic modulus of concrete at the test position, and the elastic modulus of concrete is a proportional constant of stress and strain.

[0065] Furthermore, in one embodiment, the step of correcting the first stress value according to the first temperature difference value to obtain the second stress value includes:

[0066] According to the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正 , where α is the linear expansion coefficient of concrete at the test position, and Δt is the first temperature difference.

[0067] In this embodiment, the first stress value σ is substituted into the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正 , wherein α is the linear expansion coefficient of the concrete at the test position, Δt is the first temperature difference, and the linear expansion coefficient is the elongation per unit length of a solid material when its temperature increases by 1°C.

[0068] In this embodiment, in the current acquisition phase, the first temperature of the concrete surface at the test position and the distance between the two plates included in each group of plates at the test position measured by the rangefinder are obtained, and the plates are fixed on the concrete surface at the test position; the first distance is obtained according to the distance between the two plates included in each group of plates; the first distance difference between the first distance and the second distance is calculated, and the first temperature difference between the first temperature and the second temperature is calculated, wherein the second distance is obtained according to the distance between the two plates included in each group of plates at the test position in the previous acquisition phase, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition phase; the first stress value is calculated according to the first distance difference, and the first stress value is corrected according to the first temperature difference to obtain the second stress value. Through this embodiment, only one rangefinder, one thermometer and several plates are needed to obtain the stress value at the test position according to the corresponding formula, which reduces the test cost, and the plates are fixed on the concrete surface, even if the plates are damaged, they are easy to replace, and the fault tolerance rate is high.

[0069] Furthermore, in one embodiment, after step S40, the method further includes:

[0070] In the next acquisition stage, a third temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by the rangefinder are obtained; a third distance is obtained according to the distance between two plates included in each group of plates at the test position; a second distance difference between the third distance and the first distance is calculated, and a second temperature difference between the third temperature and the first temperature is calculated; a third stress value is calculated according to the second distance difference, and the third stress value is corrected according to the second temperature difference to obtain a fourth stress value; and a fifth stress value is obtained by calculating an average value of the second stress value and the fourth stress value.

[0071] In this embodiment, referring to the embodiment of steps S10 to S40 above, the third temperature and the third distance in the next acquisition stage are obtained in the same manner, the second distance difference and the second temperature difference between the two stages are calculated, and then the third stress value and the fourth stress value after the third stress value is corrected are obtained according to the corresponding calculation formula, and the average value of the second stress value and the fourth stress value is calculated to obtain the fifth stress value, which is the stress value at the test position.

[0072] In a third aspect, an embodiment of the present invention further provides a stress value calculation device.

[0073] In one embodiment, referring to Figure 6 , Figure 6 FIG. 1 is a schematic diagram of the functional modules of the first embodiment of the cross-section drawing device of the present invention. Figure 6 As shown, the stress value calculation device includes:

[0074] Acquisition module 10: used for acquiring, in the current acquisition phase, a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter, wherein the plates are fixed on the concrete surface at the test position;

[0075] A confirmation module 20 is configured to obtain a first distance according to a distance between two panels included in each group of panels;

[0076] A first calculation module 30 is used to calculate a first distance difference between the first distance and the second distance, and to calculate a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained according to the distance between two plates included in each group of plates at the test position in the previous acquisition stage, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage;

[0077] The second calculation module 40 is configured to calculate a first stress value according to the first distance difference, and to correct the first stress value according to the first temperature difference to obtain a second stress value.

[0078] Furthermore, in one embodiment, when the test position is at the bottom plate, the two plates included in each group of plates are arranged along a first direction, and the plates in each group are spaced apart along a second direction, wherein the first direction is the direction along the bridge, and the second direction is a direction perpendicular to the direction along the bridge.

[0079] Furthermore, in one embodiment, when the test position is at the mid-span web, the two plates included in each group of plates are arranged along the second direction, and the plates in each group are spaced apart along the first direction, wherein the first direction is the direction along the bridge, and the second direction is the direction perpendicular to the direction along the bridge.

[0080] Further, in one embodiment, when the test position is at the 1 / 4 web of the middle span, the test position includes six groups of plates, wherein the two plates included in the first group of plates are arranged along the first direction, the two plates included in the second group of plates are arranged along the third direction, the two plates included in the third group of plates are arranged along the fourth direction, the two plates included in the fourth group of plates are arranged along the fifth direction, the two plates included in the fifth group of plates are arranged along the sixth direction, and the two plates included in the sixth group of plates are arranged along the first direction, wherein the first direction is the direction along the bridge direction, the third direction is the direction of the first direction rotated clockwise by a first angle, the fourth direction is the direction of the first direction rotated counterclockwise by a first angle, the fifth direction is the direction of the first direction rotated counterclockwise by a first angle, and the sixth direction is the direction of the first direction rotated clockwise by a first angle;

[0081] The first group of panels includes panel 1 and panel 2, the second group of panels includes panel 2 and panel 3, the third group of panels includes panel 2 and panel 4, the fourth group of panels includes panel 3 and panel 5, the fifth group of panels includes panel 4 and panel 5, and the sixth group of panels includes panel 5 and panel 6.

[0082] Furthermore, in one embodiment, the second calculation module 40 is specifically used for:

[0083] The strain value ε is obtained according to the strain value calculation formula ε=Δa / a, where a is the initial distance between the two plates included in each group of plates, and Δa is the first distance difference;

[0084] The first stress value σ is obtained according to the stress value calculation formula σ=ε×E, where E is the elastic modulus of concrete at the test position.

[0085] Furthermore, in one embodiment, the second calculation module 40 is specifically used for:

[0086] According to the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正 , where α is the linear expansion coefficient of concrete at the test position, and Δt is the first temperature difference.

[0087] Furthermore, in one embodiment, the acquisition module 10 is further used for:

[0088] In the next acquisition phase, a third temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by the distance meter are obtained;

[0089] The confirmation module 20 is further used to: obtain a third distance according to the distance between two panels included in each group of panels at the test position;

[0090] The first calculation module 30 is further used to calculate a second distance difference between the third distance and the first distance, and to calculate a second temperature difference between the third temperature and the first temperature;

[0091] The second calculation module 40 is further used to calculate a third stress value according to the second distance difference, and to correct the third stress value according to the second temperature difference to obtain a fourth stress value;

[0092] The stress value calculation device also includes a third calculation module, which is used to calculate the average value of the second stress value and the fourth stress value to obtain a fifth stress value.

[0093] Among them, the functional implementation of each module in the above-mentioned stress value calculation device corresponds to each step in the above-mentioned stress value calculation method embodiment, and its functions and implementation processes are no longer repeated here one by one.

[0094] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium.

[0095] The readable storage medium of the present invention stores a stress value calculation program, wherein when the stress value calculation program is executed by a processor, the steps of the stress value calculation method described above are implemented.

[0096] The method implemented when the stress value calculation program is executed can refer to the various embodiments of the stress value calculation method of the present invention, and will not be described in detail here.

[0097] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0098] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0099] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present invention.

[0100] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A stress value calculation method, characterized in that: The stress value calculation method comprises: In the current acquisition phase, a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter are obtained, wherein the plates are fixed to the concrete surface at the test position; Obtaining a first distance according to the distance between two plates included in each group of plates; Calculating a first distance difference between the first distance and the second distance, and calculating a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained according to the distance between two plates included in each group of plates at the test position in the previous acquisition stage, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage; Calculate a first stress value according to the first distance difference, and correct the first stress value according to the first temperature difference to obtain a second stress value; The calculating the first stress value according to the first distance difference includes: The strain value ε is obtained according to the strain value calculation formula ε=Δa / a, where a is the initial distance between two plates included in each group of plates, and Δa is the first distance difference; The first stress value σ is obtained according to the stress value calculation formula σ=ε×E, where E is the elastic modulus of the concrete at the test position; The step of correcting the first stress value according to the first temperature difference to obtain a second stress value includes: According to the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正 , where α is the linear expansion coefficient of concrete at the test position, and Δt is the first temperature difference; After the step of calculating the first stress value according to the first distance difference and correcting the first stress value according to the first temperature difference to obtain the second stress value, the method further includes: In the next acquisition phase, a third temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by the distance meter are obtained; Obtaining a third distance according to the distance between two plates included in each group of plates at the test position; Calculating a second distance difference between the third distance and the first distance, and calculating a second temperature difference between the third temperature and the first temperature; A third stress value is calculated according to the second distance difference, and a fourth stress value is obtained by correcting the third stress value according to the second temperature difference; An average value of the second stress value and the fourth stress value is calculated to obtain a fifth stress value.

2. The stress value calculation method according to claim 1, characterized in that: When the test position is at the bottom plate, the two plates included in each group of plates are arranged along the first direction, and the plates in each group are spaced apart along the second direction, wherein the first direction is the direction along the bridge, and the second direction is a direction perpendicular to the direction along the bridge.

3. The stress value calculation method according to claim 1, characterized in that: When the test position is at the mid-span web, the two plates included in each group of plates are arranged along the second direction, and the plates in each group are spaced apart along the first direction, wherein the first direction is the direction along the bridge, and the second direction is a direction perpendicular to the direction along the bridge.

4. The stress value calculation method according to claim 1, characterized in that: When the test position is at the 1 / 4 web of the middle span, the test position includes six groups of plates, wherein the two plates included in the first group of plates are arranged along the first direction, the two plates included in the second group of plates are arranged along the third direction, the two plates included in the third group of plates are arranged along the fourth direction, the two plates included in the fourth group of plates are arranged along the fifth direction, the two plates included in the fifth group of plates are arranged along the sixth direction, and the two plates included in the sixth group of plates are arranged along the first direction, wherein the first direction is the direction along the bridge direction, the third direction is the direction of the first direction rotated clockwise by a first angle, the fourth direction is the direction of the first direction rotated counterclockwise by a first angle, the fifth direction is the direction of the first direction rotated counterclockwise by a first angle, and the sixth direction is the direction of the first direction rotated clockwise by a first angle; The first group of panels includes panel 1 and panel 2, the second group of panels includes panel 2 and panel 3, the third group of panels includes panel 2 and panel 4, the fourth group of panels includes panel 3 and panel 5, the fifth group of panels includes panel 4 and panel 5, and the sixth group of panels includes panel 5 and panel 6.

5. A stress value calculation device using the stress value calculation method according to claim 1, characterized in that: The stress value calculation device comprises: An acquisition module: used for acquiring, in the current acquisition phase, a first temperature of the concrete surface at the test position and a distance between two plates included in each group of plates at the test position measured by a distance meter, wherein the plates are fixed on the concrete surface at the test position; A confirmation module: used for obtaining a first distance according to a distance between two panels included in each group of panels; A first calculation module: used to calculate a first distance difference between the first distance and the second distance, and to calculate a first temperature difference between the first temperature and the second temperature, wherein the second distance is obtained in the previous acquisition stage according to the distance between two plates included in each group of plates at the test position, and the second temperature is the temperature of the concrete surface at the test position in the previous acquisition stage; A second calculation module: configured to calculate a first stress value according to the first distance difference, and to correct the first stress value according to the first temperature difference to obtain a second stress value; The calculating the first stress value according to the first distance difference includes: The strain value ε is obtained according to the strain value calculation formula ε=Δa / a, where a is the initial distance between two plates included in each group of plates, and Δa is the first distance difference; The first stress value σ is obtained according to the stress value calculation formula σ=ε×E, where E is the elastic modulus of the concrete at the test position; The step of correcting the first stress value according to the first temperature difference to obtain a second stress value includes: According to the stress value correction formula σ 修正 =σ-α·Δt·E to obtain the corrected second stress value σ 修正 , where α is the linear expansion coefficient of concrete at the test position, and Δt is the first temperature difference.

6. A stress value calculation device, characterized in that: The stress value calculation device includes a processor, a memory, and a stress value calculation program stored in the memory and executable by the processor, wherein when the stress value calculation program is executed by the processor, the steps of the stress value calculation method according to any one of claims 1 to 4 are implemented.

7. A readable storage medium, characterized in that: The readable storage medium stores a stress value calculation program, wherein when the stress value calculation program is executed by a processor, the steps of the stress value calculation method according to any one of claims 1 to 4 are implemented.

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