A dynamic collaborative performance evaluation method for gradient concrete composites

Abstract

The present invention proposes a method for evaluating the dynamic synergistic working performance of gradient concrete composite materials. The dynamic synergistic working performance evaluation method proposed in the present invention regards the two concrete materials as a binary series spring system with a mutual deformation coordination relationship, and comprehensively considers the synergistic working performance of the gradient concrete composite materials under different impact pressures. The present invention can effectively find the optimal thickness ratio after the gradient concrete composite materials are combined, maximize the advantages of the two materials, that is, maximize the complementary effect of advantages. This method is not only simple to calculate, but also provides a convenient and fast method for judging the synergistic working performance of gradient concrete composite materials. It is of great significance for the dynamic impact response evaluation of gradient concrete composite materials and is suitable for large-scale promotion and application.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete material testing, and in particular relates to a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials. Background Art

[0002] Some concrete materials used as wall panels, which have poor durability but relatively low cost, are often more susceptible to external degradation and require reinforcement and repair with stronger, more durable, but relatively expensive concrete to meet engineering requirements. For example, the wall panels of hazardous materials warehouses are subject to explosions and impact loads. However, research on gradient concrete composites often focuses on static properties such as bond strength and shear resistance after composite construction. There are no specific methods for evaluating the dynamic synergistic performance of gradient concrete composites. Therefore, it is necessary to study the advantages and disadvantages of the dynamic synergistic performance of gradient concrete composites.

[0003] Concrete specifications often use the uniaxial strength of cubic or cylindrical specimens to measure the strength of concrete materials. In reality, when concrete yields or fractures, the unit cell at the failure surface is inevitably in a complex stress state. For gradient concrete composites, each load step under uniaxial loading is a complex deformation coordination, ultimately resulting in the transfer of deformation and failure pressure to areas with weaker stiffness and strength. Therefore, it is not reasonable to characterize the strength of gradient concrete composite specimens solely based on the uniaxial strength of cubic or cylindrical specimens.

[0004] Therefore, in order to comprehensively consider the dynamic synergistic working performance of gradient concrete composites, based on the existing research on the static and microscopic properties of gradient concrete composites, how to propose a dynamic synergistic working performance evaluation method for gradient concrete composites and provide new ideas for the dynamic impact response evaluation of gradient concrete composites has become a long-term technical demand of technicians in this field. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned problems in the prior art, use the concept of synergistic working performance to assist in measuring the dynamic mechanical properties of gradient concrete composite materials, and provide a dynamic synergistic working performance judgment method that is simple to calculate and easy to implement. Specifically, a dynamic synergistic working performance evaluation method for gradient concrete composite materials is proposed. The method provides a new idea for studying the dynamic synergistic working performance of gradient concrete composite materials under different impact pressures, so as to find the optimal gradient composite thickness and maximize the complementary effect of the advantages of concrete materials in terms of performance, cost, etc.

[0006] The present invention is achieved through the following technical solutions. The present invention proposes a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials. The dynamic cooperative working performance evaluation method comprehensively considers the cooperative working performance of gradient concrete composite materials under different impact pressures, and regards the two materials as a binary series spring system with a mutual deformation coordination relationship. The method specifically includes the following steps:

[0007] The first step is to number the single concrete material test blocks and gradient concrete composite material test blocks that need to be tested;

[0008] The second step is to obtain the static load strength value f of the single concrete material specimen and the gradient concrete composite material specimen of the same size and age as the dynamic strength test. cj ;

[0009] The third step is to use the Hopkinson bar system to test the dynamic compressive peak strength f of the single concrete material specimen and the gradient concrete composite material specimen with the same size and age as the static load strength. cd ;

[0010] Step 4: Calculate the dynamic increase coefficient DIF of the single concrete material and gradient concrete composite material test blocks c value;

[0011] Step 5: Take the percentage of the volume of the whole test block occupied by one single concrete material as the horizontal axis and the dynamic increase coefficient DIF of the concrete test block as the horizontal axis. c The value is used as the vertical coordinate to establish a coordinate system;

[0012] Step 6: Based on the scatter point value of the single concrete material test block, the maximum value (0%, DIF cOne,max )、(100%,DIF cOther,max ) fits the upper boundary of the linear region and tests the minimum value (0%, DIF cOne,min )、(100%,DIF cOther,min ) fitting the lower boundary of the linear region, thereby obtaining a linear fitting region consisting of the upper and lower boundaries of the concrete specimen under different impact pressures, wherein the linear fitting region includes the test scatter point values ​​of the single concrete material specimen;

[0013] Step 7: The dynamic increase coefficient DIF obtained from the gradient concrete composite material test block c The value is compared with the linear fitting area to judge the quality of its dynamic collaborative working performance.

[0014] Furthermore, the gradient concrete composite material test block is a gradient concrete composite material cylindrical test block.

[0015] Furthermore, the DIF of the test block in the fourth step c The value is the dynamic increase coefficient, which is used to evaluate the increase in compressive strength of concrete materials under the influence of impact pressure under impact load, and it satisfies the following relationship:

[0016]

[0017] Among them, DIF c is the dynamic increase coefficient of the concrete specimen, f cd is the dynamic peak compressive strength value of the concrete specimen, f cj is the static load strength value of the concrete specimen.

[0018] Furthermore, the expression of the linear fitting area is: Among them, the maximum and minimum values ​​of the slope of the linear fitting regional coefficient are a max 、a min The maximum and minimum intercept values ​​are b max 、b min , x is the proportion of one type of concrete.

[0019] Furthermore, in the sixth step, DIF cOne,max 、DIF cOne,min 、DIF cOther,max 、DIF cOther,min They represent the maximum and minimum values ​​of the dynamic compressive strength increase coefficient of two different concrete materials respectively.

[0020] Furthermore, in the linear fitting region, b max =DIF One,max , b min =DIF One,min .

[0021] Furthermore, the range of x is 0%-100%.

[0022] Furthermore, in the linear fitting region, DIF c It is the dynamic increase coefficient of the concrete specimen under a certain impact pressure of the impact rod.

[0023] The present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials are implemented.

[0024] The present invention provides a computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, the steps of the method for evaluating the dynamic cooperative working performance of gradient concrete composite materials are implemented.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention proposes a method for evaluating the dynamic synergistic working performance of gradient concrete composite materials, which can comprehensively consider the dynamic synergistic working performance of gradient concrete composite materials under different impact pressures. The two materials are regarded as a binary series spring system with a mutual deformation coordination relationship. The optimal thickness ratio after the two materials are combined can be effectively found, and the advantages of the two materials can be maximized, that is, the complementary effect of advantages can be maximized.

[0027] (2) This method is not only simple to calculate, but also provides a convenient and rapid method for determining the synergistic performance of gradient concrete composite materials. Using the concept of synergistic performance to assist in measuring the dynamic mechanical properties of gradient concrete composite materials can make up for the inaccurate drawback of using only the uniaxial strength of cubic or cylindrical specimens to characterize gradient concrete composite materials. It is of great significance for the evaluation of the dynamic impact response of gradient concrete composite materials and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 This is a flow chart of a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials according to the present invention;

[0030] Figure 2 This is a discriminant diagram of the dynamic cooperative working performance of the gradient concrete composite material under different impact air pressures of the present invention;

[0031] Figure 3 This is a discriminant diagram of the dynamic cooperative working performance of the gradient concrete composite material under 0.41 MPa of the present invention;

[0032] Figure 4 This is a discriminant diagram of the dynamic cooperative working performance of the gradient concrete composite material under 0.55 MPa of the present invention;

[0033] Figure 5 This is a discriminant diagram of the dynamic cooperative working performance of the gradient concrete composite material under 0.71 MPa of the present invention. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] Combine Figure 1-Figure 5 The present invention proposes a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials. The method comprehensively considers the cooperative working performance of gradient concrete composite materials under different impact pressures and regards the two materials as a binary series spring system with a mutual deformation coordination relationship. The method specifically includes the following steps:

[0036] The first step is to number the single concrete material test blocks and gradient concrete composite material test blocks that need to be tested;

[0037] The second step is to obtain the static load strength value f of the single concrete material specimen and the gradient concrete composite material specimen of the same size and age as the dynamic strength test. cj ;

[0038] The third step is to use the Hopkinson bar system to test the dynamic compressive peak strength f of the single concrete material specimen and the gradient concrete composite material specimen with the same size and age as the static load strength. cd ;

[0039] Step 4: Calculate the dynamic increase coefficient DIF of the single concrete material and gradient concrete composite material test blocks c value;

[0040] Step 5: Take the percentage of the volume of the whole test block occupied by one single concrete material as the horizontal axis and the dynamic increase coefficient DIF of the concrete test block as the horizontal axis. c The value is used as the vertical coordinate to establish a coordinate system;

[0041] Step 6: Based on the scatter point value of the single concrete material test block, the maximum value (0%, DIF cOne,max )、(100%,DIF cOther,max ) fits the upper boundary of the linear region and tests the minimum value (0%, DIF cOne,min )、(100%,DIF cOther,min) fitting the lower boundary of the linear region, thereby obtaining a linear fitting region consisting of the upper and lower boundaries of the concrete specimen under different impact pressures, wherein the linear fitting region includes the test scatter point values ​​of the single concrete material specimen;

[0042] Step 7: The dynamic increase coefficient DIF obtained from the gradient concrete composite material test block c The value is compared with the linear fitting area to judge the quality of its dynamic collaborative working performance.

[0043] The gradient concrete composite material test block is a gradient concrete composite material cylindrical test block.

[0044] The DIF of the test block in the fourth step c The value is the dynamic increase coefficient, which is currently a widely accepted indicator of dynamic performance response. It is used to evaluate the increase in the compressive strength of concrete materials under the influence of impact pressure under impact loads; it satisfies the following relationship:

[0045]

[0046] Among them, DIF c is the dynamic increase coefficient of the concrete specimen, f cd is the dynamic peak compressive strength value of the concrete specimen, f cj is the static load strength value of the concrete specimen.

[0047] The expression of the linear fitting region is: Among them, the maximum and minimum values ​​of the slope of the linear fitting regional coefficient are a max 、a min The maximum and minimum intercept values ​​are b max 、b min , x is the proportion of one type of concrete, and the range of x is 0%-100%.

[0048] In the sixth step, DIF cOne,max 、DIF cOne,min 、DIF cOther,max 、DIF cOther,min They represent the maximum and minimum values ​​of the dynamic compressive strength increase coefficient of two different concrete materials respectively.

[0049] In the linear fitting region, b max =DIF One,max , b min =DIF One,min .

[0050] In the linear fitting area, DIF cIt is the dynamic increase coefficient of the concrete specimen under a certain impact pressure of the impact rod.

[0051] Example

[0052] The present invention can be explained in more detail by the following examples, but the present invention is not limited to the following examples;

[0053] Combined with attachment Figure 1-5 The method for evaluating the dynamic synergistic performance of gradient concrete composite materials described in the present invention, taking the evaluation of the dynamic synergistic performance of alkali-activated concrete and ultra-high performance concrete after gradient composites of different thicknesses as an example, specifically includes the following steps:

[0054] The first step is to number the single alkali-activated concrete specimen, the single ultra-high performance concrete specimen, and the composite specimen with ultra-high performance concrete accounting for 50%, 33%, and 67% of the volume of the entire composite specimen as A100, U0, C50, C33, and C67, respectively, where A represents alkali-activated concrete, U represents ultra-high performance concrete, and C represents gradient concrete composite specimen. The numbers after the letters represent the volume percentage of alkali-activated concrete in the entire concrete specimen; for example, C50 represents a composite specimen of alkali-activated concrete and ultra-high performance concrete, and the volume percentage of alkali-activated concrete in the entire specimen is 50%;

[0055] The second step is to first test and obtain the 28d static load strength value f of the alkali-activated concrete cylindrical specimen with a diameter of 68mm and a thickness of 35mm, the ultra-high performance concrete cylindrical specimen, and the composite cylindrical specimen with ultra-high performance concrete accounting for 50%, 33%, and 67% of the volume of the entire composite specimen. cj Each test block consists of 3 blocks. The arithmetic mean of the measured values ​​of each group of 3 test blocks is taken as the static load strength value of the test blocks in this group. If the difference between the maximum or minimum value of the 3 measured values ​​and the middle value exceeds 15% of the middle value, the maximum and minimum values ​​should be discarded and the middle value should be taken as the static load strength of the test blocks in this group. If the difference between the maximum and minimum values ​​and the middle value exceeds 15% of the middle value, the test results of this group of test blocks are invalid and need to be retested.

[0056] The static load strength values ​​of A100, U0, C50, C33, and C67 obtained from the test were 58.5MPa, 103.1MPa, 73.1MPa, 84.4MPa, and 68.9MPa, respectively (the arithmetic mean of the measured values ​​for each group of test blocks was taken);

[0057] The third step is to use the Hopkinson bar system to test the dynamic compressive peak strength value f of a single alkali-excited concrete cylindrical specimen, a single ultra-high performance concrete cylindrical specimen, and a composite cylindrical specimen with ultra-high performance concrete accounting for 50%, 33%, and 67% of the entire composite specimen volume under the same size and age as the static load strength test. cd , Each group of test blocks consists of 3-4 blocks, and the arithmetic mean of the corresponding test blocks in each group is taken for calculation;

[0058] The fourth step is to calculate the dynamic increase coefficient DIF of the test block c value, corresponding DIF c See formula (1);

[0059]

[0060] Where, DIF c is the dynamic increase coefficient of the concrete specimen, f cd is the dynamic compressive peak strength of the concrete specimen, f cj is the static load strength value of the concrete specimen, and the DIF of the single concrete material specimen is calculated. c As shown in Table 1, the DIF of the gradient concrete composite material specimen was calculated. c See Table 2:

[0061] Table 1

[0062]

[0063] Table 2

[0064]

[0065] Step 5: Take the percentage of ultra-high performance concrete in the entire test block as the horizontal axis and the dynamic increase coefficient DIF of the concrete test block as the horizontal axis. c The value is used as the vertical coordinate to establish a coordinate system;

[0066] Step 6: Based on the scatter point value of a single concrete material test block, the maximum value (0%, DIF cOne,max )、(100%,DIF cOther,max ) fits the upper boundary of the linear region and tests the minimum value (0%, DIF cOne,min )、(100%,DIF cOther,min ) fits the lower boundary of the linear region, thereby obtaining the linear fitting region consisting of the upper and lower boundaries of the concrete specimen under different impact pressures. This linear fitting region includes the test scatter values ​​of the single concrete material specimen. The expression of the linear fitting region is: Among them, the maximum and minimum values ​​of the slope of the linear fitting regional coefficient are amax 、a min The maximum and minimum intercept values ​​are b max 、b min , x is the proportion of one type of concrete. cOne,max 、DIF cOne,min 、DIF cOther,max 、DIF cOther,min Represent the maximum and minimum values ​​of the dynamic compressive strength increase coefficient of two different concrete materials. In the linear fitting area, b max =DIF One,max , b min =DIF One,min The corresponding fitting regional coefficients are shown in Table 3.

[0067] Table 3

[0068]

[0069] The linear fitting area under different shock pressures is shown in formulas (2)-(4):

[0070]

[0071]

[0072]

[0073] Where DIF c0.41,max 、DIF c0.55,max 、DIF c0.71,max They are the upper boundaries of the linear fitting area of ​​the dynamic increase coefficient of the concrete specimen under the impact pressure of 0.41MPa, 0.55MPa, and 0.71MPa, respectively. c0.41,min 、DIF c0.55,min 、DIF c0.71,min are the lower boundaries of the linear fitting area of ​​the dynamic increase coefficient of the concrete specimen under the impact air pressure of 0.41MPa, 0.55MPa, and 0.71MPa, respectively; x is the proportion of ultra-high performance concrete in the entire cylindrical specimen, ranging from 0% to 100%;

[0074] Step 7: DIF obtained from the gradient concrete composite test block cThe values ​​are compared with the linear fit region. If the point falls above the fit region, it indicates that the two materials have excellent synergistic performance; if the point falls within the fit region, it indicates that the two materials have good synergistic performance; if the point falls below the fit region, it indicates that the two materials have poor synergistic performance; if the point falls on the fit line in the upper boundary region, it indicates that the two materials have between excellent and good synergistic performance; if the point falls on the fit line in the lower boundary region, it indicates that the two materials have between good and poor synergistic performance. The further the point deviates from the upper boundary region fit line, the better the dynamic synergistic performance; the further the point deviates from the lower boundary region fit line, the worse the dynamic synergistic performance. For points falling within the area enclosed by the fit region, the closer to the upper boundary region fit line, the better the synergistic performance; the closer to the lower boundary region fit line, the worse the synergistic performance. Under a certain impact pressure, the overall synergistic performance of the test blocks of a certain thickness ratio is determined by the region with the largest number of test pieces.

[0075] Depend on Figure 1-Figure 5 It can be seen that, under the impact pressure of 0.41MPa, for example, when the thickness of ultra-high performance concrete accounts for 50%, the corresponding collaborative working performance is better than when the proportion is 33% and 67%. When the proportion is 33%, most of the test blocks have good collaborative working performance, a few test blocks have poor collaborative working performance, and the overall collaborative performance is good. When the proportion is 50%, there are test blocks in the areas of excellent collaborative working performance, good collaborative working performance, and poor collaborative working performance of the two materials, and the overall collaborative performance is good. When the proportion is 67%, the situation is consistent with the proportion of 33%. Under the impact pressure of 0.55MPa, when the thickness of ultra-high performance concrete accounts for 50%, the corresponding dynamic collaborative working performance is better than when the proportion is 33% and 67%. Among them, when the thickness accounts for 50%, the corresponding test block has good collaborative working performance, and when the thickness accounts for 33% and 67%, the corresponding test block DIF c The values ​​all fall outside the fitting area, and their collaborative working performance is poor. When the proportion of ultra-high performance concrete is 33%, the corresponding collaborative working performance is even worse.

[0076] Under an impact pressure of 0.71 MPa, the synergy of the 33% ultra-high performance concrete specimens fell below the fitted region, indicating poor collaborative performance. More specimens with 50% and 67% percentages fell within the linear fit region, indicating better collaborative performance. The 67% percentage exhibited better collaborative performance than the 50% percentage.

[0077] The test block under different thickness gradient composite conditions can be regarded as a binary series spring system, and the series spring system has a mutual deformation coordination relationship. Figure 1-Figure 5It can be seen that at 0.41MPa and 0.55MPa, when the volume proportion of ultra-high performance concrete increases from 50% to 67%, the corresponding compatibility deteriorates. The reason is that the elastic modulus of ultra-high performance concrete (50GPa) is much larger than that of alkali-activated concrete (19.5GPa), and the deformation value it can provide is smaller, which leads to an increase in the deformation pressure of the alkali-activated concrete part, making it easier to reach the strength value of the alkali-activated concrete part. As a result, the thinner alkali-activated concrete layer is more easily damaged and reaches the strength limit of the test block, resulting in the phenomenon that the strength of the test block with a thicker alkali-activated concrete layer is lower. If the alkali-activated concrete and ultra-high performance concrete have good compatibility, the overall strength of the test block will be high. If the compatibility is poor, the alkali-activated concrete with lower material strength will bear the pressure alone, resulting in a low overall strength of the test block.

[0078] The advantages of the present invention are as follows:

[0079] (1) Traditional evaluation of gradient concrete composite materials focuses on static and microscopic properties, such as bonding properties, shear properties, and impermeability. There is a lack of evaluation methods for the dynamic response performance of two materials after composite. The present invention proposes a method for evaluating the dynamic synergistic performance of gradient concrete composite materials, which can comprehensively consider the dynamic synergistic performance of gradient concrete composite materials under different impact pressures. The two materials are regarded as a binary series spring system with a mutual deformation coordination relationship. The optimal thickness ratio of the two materials after combination can be effectively found to maximize the advantages of the two materials, that is, to maximize the complementary effect of advantages.

[0080] (2) The uniaxial strength of cubic or cylindrical specimens is often used in the specifications for measurement. In fact, when concrete yields or breaks, the unit cell at the failure surface must be in a complex stress state. For single-component concrete specimens, such a concept replacement can meet the engineering accuracy within the allowable range. However, for composite specimens, each load step of the specimen under uniaxial load is a complex deformation coordination, and the final result must be that the pressure of deformation and failure is transferred to the part with weaker stiffness and strength. Therefore, it is not reasonable to replace the strength concept of composite specimens with the uniaxial strength of cubic or cylindrical specimens. For concrete composite specimens, using the concept of collaborative working performance to assist in measuring the dynamic mechanical properties of gradient concrete composite materials can make up for this drawback. It is a method for describing the mechanical properties of concrete composite materials that takes into account both mechanistic and engineering aspects, and has very high value in both theory and engineering.

[0081] The present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of a method for evaluating the dynamic cooperative working performance of gradient concrete composite materials are implemented.

[0082] The present invention provides a computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, the steps of the method for evaluating the dynamic cooperative working performance of gradient concrete composite materials are implemented.

[0083] The memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DRRAM). It should be noted that the memory of the methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0084] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0085] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0086] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0087] The above is a detailed introduction to the dynamic collaborative working performance evaluation method for gradient concrete composite materials proposed in the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for evaluating the dynamic cooperative working performance of gradient concrete composite materials, characterized by: The dynamic cooperative performance evaluation method comprehensively considers the cooperative performance of the gradient concrete composite material under different impact pressures, and regards the two materials as a binary series spring system with a mutual deformation coordination relationship. The method specifically includes the following steps: The first step is to number the single concrete material test blocks and gradient concrete composite material test blocks that need to be tested; The second step is to obtain the static load strength values ​​of single concrete material specimens and gradient concrete composite material specimens of the same size and age as the dynamic strength test. ; The third step is to use the Hopkinson bar system to test the dynamic compressive peak strength of the single concrete material specimen and the gradient concrete composite material specimen of the same size and age as the static load strength test under different impact pressures. ; Step 4: Calculate the dynamic increase coefficient of single concrete material test block and gradient concrete composite material test block value; Step 5: Take the percentage of the volume of one single concrete material in the whole test block as the horizontal axis and the dynamic increase coefficient of the concrete test block as the horizontal axis. The value is used as the vertical coordinate to establish a coordinate system; Step 6: For each impact pressure, based on the scattered value of a single concrete material test block, the maximum value (0%, )、(100%, ) fits the upper boundary of the linear region, and uses the minimum value (0%, )、(100%, ) fit the lower boundary of the linear region, thereby obtaining a linear fitting region consisting of the upper and lower boundaries of the concrete specimen under the impact pressure, and the linear fitting region includes the test scatter point values ​​of the single concrete material specimen; Step 7: The dynamic increase coefficient of the gradient concrete composite test block under different impact pressures The value is compared with the linear fitting area under the same impact pressure to judge the quality of the dynamic cooperative working performance of the gradient concrete composite material. The test piece in the fourth step The value is the dynamic increase coefficient, which is used to evaluate the increase in compressive strength of concrete materials under the influence of impact pressure under impact load, and it satisfies the following relationship: in, is the dynamic increase coefficient of the concrete specimen, is the dynamic compressive peak strength value of the concrete specimen, is the static load strength value of the concrete specimen.

2. The method according to claim 1, wherein: The gradient concrete composite material test block is a gradient concrete composite material cylindrical test block.

3. The method according to claim 1, wherein: The expression of the linear fitting region is: , where the maximum and minimum slopes of the linear fitting regional coefficients are 、 The maximum and minimum intercept values ​​are 、 , It is the volume percentage of a single concrete material in the entire specimen.

4. The method according to claim 3, wherein: In the sixth step 、 、 、 They represent the maximum and minimum values ​​of the dynamic increase coefficients of two different concrete materials respectively.

5. The method according to claim 4, characterized in that: In the linear fitting region, , , , .

6. The method according to claim 3, wherein: described The range is 0%-100%.

7. The method according to claim 1, wherein: In the linear fitting region, It is the dynamic increase coefficient of the concrete specimen under a certain impact pressure of the impact rod.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium for storing computer instructions, characterized in that: When the computer instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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