Discrete element simulation method and device for three-dimensional steel fiber concrete

Abstract

The invention provides a discrete element simulation method and device for three-dimensional steel fiber concrete, and solves the technical problem that accurate analysis of mechanical property damage accumulation and a crack propagation process is not facilitated. The method comprises the steps of determining a target area where steel fibers are put and recording space coordinates; generating a single rigid sphere simulation model; generating a concrete matrix discrete element simulation model according to the putting target area; generating a single rigid steel fiber simulation model according to the actual shape of the steel fiber; randomly putting rigid steel fibers in the putting target area according to the quality requirement to form a rigid steel fiber distribution simulation model; rigid steel fibers are disassembled through a single rigid sphere to form a deformable steel fiber simulation model, and rigid steel fiber distribution simulation model replacement is carried out to form a deformable steel fiber distribution model; and forming a steel fiber concrete discrete element simulation model according to the concrete matrix discrete element simulation model and the deformable steel fiber distribution model. And the requirements of concrete matrix grading and steel fiber content are met.

Description

Technical Field

[0001] The invention relates to the technical field of force simulation, and in particular to a discrete element simulation method for three-dimensional steel fiber concrete. Background Art

[0002] Concrete has many advantages, but its low tensile strength, poor flexural and impact resistance limit its application. In order to utilize the advantages of concrete and improve its tensile strength and flexural properties, fiber concrete formed by adding fibers with high tensile strength, high ultimate elongation and high toughness into concrete has gradually emerged, among which steel fiber concrete has the fastest development and the widest application. At the microscopic level, hardened steel fiber concrete can be regarded as a four-phase composite material composed of aggregate, cement mortar, the interface transition zone (ITZ) between the two and steel fibers. The establishment of a mesoscopic structure simulation model of steel fiber concrete is of great significance for two aspects of research: one is the relationship between the performance of each phase at the microscopic level and the macroscopic mechanical properties of steel fiber concrete, and the other is the damage accumulation process of steel fiber concrete during loading.

[0003] At present, the simulation of steel fiber concrete is mostly based on finite element method and discrete element method. The steel fiber concrete model generated by the finite element method cannot obtain the process of damage accumulation and crack propagation during loading. Simulation research based on the discrete element method is mostly based on a two-dimensional simulation model, and the steel fiber is simplified into an indeformable rigid body. It is mostly used to study the crack resistance of steel fiber. It cannot accurately reflect the true characteristics of three-dimensional anisotropic steel fiber concrete, nor can it truly reflect the true failure process of steel fiber concrete. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a discrete element simulation method and device for three-dimensional steel fiber concrete, which solves the technical problem that the existing steel fiber concrete simulation construction method is not conducive to accurate analysis of mechanical property damage accumulation and crack propagation process.

[0005] The discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention comprises:

[0006] Determine the target area where the steel fiber is placed, and record the spatial coordinates of the target area;

[0007] Generate a single rigid sphere simulation model;

[0008] Generate a discrete element simulation model of the concrete matrix according to the target area for placement;

[0009] Generate a single rigid steel fiber simulation model based on the actual shape of the steel fiber;

[0010] According to the quality requirements, rigid steel fibers are randomly placed in the target area to form a rigid steel fiber distribution simulation model;

[0011] A deformable steel fiber simulation model is formed by disassembling the rigid steel fiber through a single rigid sphere, and the rigid steel fiber distribution simulation model is replaced to form a deformable steel fiber distribution model;

[0012] A steel fiber concrete discrete element simulation model is constructed based on the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

[0013] In one embodiment of the present invention, the delivery target area adopts a rectangular coordinate space coordinate system to form a quantification of the three-dimensional scale and volume of the delivery target area.

[0014] In one embodiment of the present invention, the physical properties of the single rigid sphere are set to be the same as the physical properties of the actual steel fiber, and the scale and shape correspond to the actual steel fiber.

[0015] In one embodiment of the present invention, a discrete element simulation model of the concrete matrix is ​​generated in the delivery target area according to the design gradation of the concrete matrix.

[0016] In one embodiment of the present invention, the formation of the single rigid steel fiber simulation model includes:

[0017] The target steel fiber is discretized into a combination of a series of matching spheres, the diameter of the matching spheres is the same as the cross-sectional size of the steel fiber, the geometric linear figure formed by the connecting line of the centers of the matching spheres is the same as the actual shape of the steel fiber, and the tangency between the matching spheres is defined as a rigid connection that cannot be broken;

[0018] The coordinates of the center of the matching sphere are determined by calculating the spatial coordinates according to the linear graph to form a mathematical model of the steel fiber;

[0019] The mathematical model of the target steel fiber is imported into the discrete element simulation software to generate a simulation model of a single rigid steel fiber.

[0020] In one embodiment of the present invention, the formation of the rigid steel fiber distribution simulation model includes:

[0021] Determine the unit content of steel fibers in the concrete matrix, the volume and mass of individual steel fibers;

[0022] Determine the specific quantity to be delivered based on the volume of the target area and calculation rules;

[0023] A single rigid steel fiber simulation model is used as a template for random placement in the target area to form a rigid steel fiber distribution simulation model.

[0024] In one embodiment of the present invention, the forming of the deformable steel fiber distribution model includes:

[0025] Traverse the rigid steel fibers generated in the rigid steel fiber distribution simulation model, and record the radius and spatial coordinates of all rigid steel fibers to form vector data;

[0026] The rigid steel fiber distribution simulation model is disassembled through a single rigid sphere, and the matching sphere is replaced by a single rigid sphere through vector data;

[0027] A contact model is applied between single rigid spheres to form deformable steel fibers.

[0028] In one embodiment of the present invention, the forming of the steel fiber concrete discrete element simulation model comprises:

[0029] The discrete element simulation model of concrete matrix applies a contact model between the concrete matrix;

[0030] A contact model is applied between the concrete matrix and the deformable steel fibers according to the deformable steel fiber distribution model.

[0031] The discrete element simulation device of three-dimensional steel fiber concrete according to the embodiment of the present invention comprises:

[0032] A memory for storing program codes in the process of processing the discrete element simulation method of three-dimensional steel fiber concrete as described above;

[0033] A processor is used to execute the program code.

[0034] The discrete element simulation device of three-dimensional steel fiber concrete according to the embodiment of the present invention comprises:

[0035] A coordinate space setting module is used to determine the target area where the steel fiber is placed and record the spatial coordinates of the target area;

[0036] Sphere simulation setting module, used to generate a single rigid sphere simulation model;

[0037] A matrix simulation setting module is used to generate a discrete element simulation model of a concrete matrix according to a target area for placement;

[0038] A steel fiber simulation setting module is used to generate a single rigid steel fiber simulation model according to the actual shape of the steel fiber;

[0039] A rigid distribution simulation setting module, used to randomly place rigid steel fibers in a placement target area according to quality requirements to form a rigid steel fiber distribution simulation model;

[0040] A deformable distribution simulation setting module is used to disassemble the rigid steel fiber through a single rigid sphere to form a deformable steel fiber simulation model, and to replace the rigid steel fiber distribution simulation model to form a deformable steel fiber distribution model;

[0041] The concrete simulation setting module is used to form a steel fiber concrete discrete element simulation model based on the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

[0042] The discrete element simulation method and device of three-dimensional steel fiber concrete in the embodiment of the present invention constructs a deformable steel fiber simulation and a steel fiber spatial distribution simulation based on the discrete element simulation of the existing concrete matrix, which satisfies the simulation of the real characteristics of the four-phase well-graded concrete according to the actual content and placement of the steel fiber. The simulation process can reflect the random distribution characteristics of the steel fiber in the concrete matrix, avoid mutual interference between the steel fibers, and can be used to make accurate analysis of the mechanical performance damage accumulation and crack propagation process, meeting the requirements of the concrete matrix gradation and steel fiber content. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the process of a discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0044] Figure 2 Shown is a three-dimensional schematic diagram of a sphere in a single rigid sphere simulation model in a discrete element simulation method for three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0045] Figure 3 The figure shows a microscopic structural diagram of a discrete element simulation model of a concrete matrix in a discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0046] Figure 4 Shown is a schematic diagram of a steel fiber configuration in a discrete element simulation method for three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0047] Figure 5 It is a schematic diagram of a continuous rigid structure in a simulation model of a single rigid steel fiber in a discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0048] Figure 6 It is a schematic diagram of the microscopic distribution of a rigid steel fiber distribution simulation model formed by randomly placing a rigid steel fiber model as a template in a discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0049] Figure 7 It is a schematic diagram of the microscopic distribution of a deformable steel fiber distribution simulation model formed by replacing a rigid steel fiber distribution simulation model in a discrete element simulation method for three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0050] Figure 8 It is a schematic diagram of the microstructure of a steel fiber concrete model including a deformable steel fiber distribution model in a discrete element simulation method of three-dimensional steel fiber concrete according to an embodiment of the present invention.

[0051] Fig. 9 FIG. 1 is a schematic diagram of the architecture of a discrete element simulation device for three-dimensional steel fiber concrete according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer and more understandable, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] A discrete element simulation method for three-dimensional steel fiber concrete according to an embodiment of the present invention is as follows Figure 1 As shown. Figure 1 In this embodiment, the present invention includes:

[0054] Step 100: Determine the target area where the steel fiber is placed, and record the spatial coordinates of the target area.

[0055] By establishing the spatial coordinate properties of the solid simulation model, the volume quantification parameters required in the solid simulation can be defined, such as relative position, distance, contour and density.

[0056] Step 200: Generate a single rigid sphere simulation model.

[0057] As the smallest unit for deconstructing rigid steel fibers, a single rigid sphere can not only quantify the physical properties of real steel fibers, but also simulate the stress state of steel fibers through mapping the physical laws between them. The simulation model of a single rigid sphere can utilize existing simulation results.

[0058] Step 300: Generate a discrete element simulation model of a concrete matrix according to the target area.

[0059] Those skilled in the art can understand that the concrete matrix referred to in this embodiment refers to a concrete block generated by the gradation parameters of the concrete matrix mortar and aggregate according to the construction standards and design rules, and does not contain steel fibers. It includes the mechanical simulation law between mortar and aggregate. The discrete element simulation model of the concrete matrix can use existing simulation results.

[0060] Step 400: Generate a single rigid steel fiber simulation model according to the actual shape of the steel fiber.

[0061] The corresponding rigid steel fiber simulation model is formed according to the shape quantification of a single steel fiber. The rigid steel fiber simulation model does not have deformation characteristics.

[0062] Step 500: randomly placing rigid steel fibers in a placement target area according to quality requirements to form a rigid steel fiber distribution simulation model.

[0063] The steel fiber uses the rigid steel fiber simulation model as a template, and places the corresponding quantity and quality of steel fibers in the placement target area of ​​the discrete element simulation model of the concrete matrix according to the construction standards. By controlling the placement simulation process, a rigid steel fiber distribution model that conforms to the random placement state is formed.

[0064] Step 600: Disassemble the rigid steel fibers through a single rigid sphere to form a deformable steel fiber simulation model, and replace the rigid steel fiber distribution simulation model to form a deformable steel fiber distribution model.

[0065] The extended shape and center of gravity of a single steel fiber are disassembled by continuously arranging single rigid spheres, and the mechanical deformation simulation law between single rigid spheres is formed according to the material properties of a single steel fiber in reality, thereby forming a simulation model of a single deformable steel fiber. The simulation characteristics of steel fibers are replaced by replacing the rigid steel fiber distribution model with the simulation model of the deformable steel fiber, thereby forming a deformable steel fiber distribution model applied to the discrete element simulation model of the concrete matrix.

[0066] Step 700: constructing a steel fiber concrete discrete element simulation model according to the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

[0067] By integrating the distribution state of deformable steel fibers in the concrete matrix, an accurate simulation of the morphology of steel fiber concrete in reality can be constructed. By providing an interactive mechanical deformation characteristic model under the gradation state of mortar, aggregate and steel fibers in the matrix, the overall mechanical properties of steel fiber concrete can be truly reflected.

[0068] The discrete element simulation method of three-dimensional steel fiber concrete in the embodiment of the present invention constructs a deformable steel fiber simulation and a steel fiber spatial distribution simulation based on the discrete element simulation of the existing concrete matrix, so as to meet the requirements of the simulation of the real characteristics of four-phase well-graded concrete according to the actual content and placement of the steel fibers. The simulation process can reflect the random distribution characteristics of the steel fibers in the concrete matrix, avoid mutual interference between the steel fibers, and can be used to accurately analyze the mechanical properties, damage accumulation, and crack propagation process.

[0069] In one embodiment of the present invention, step 100 includes:

[0070] The delivery target area adopts a rectangular coordinate space coordinate system, thereby forming a quantification of the three-dimensional scale and volume of the delivery target area. The delivery target area includes all or part of the concrete matrix of a certain volume. In one embodiment of the present invention, the target delivery area is a rectangular parallelepiped with dimensions of 0.4m×0.1m×0.1m (length×width×height), and the volume of the target area is 0.004m 3 .

[0071] Combination Figure 2 As shown, in one embodiment of the present invention, step 200 includes:

[0072] The physical properties of the single rigid sphere, such as density and strength, are the same as those of the actual steel fiber. The radial dimension of the single rigid sphere corresponds to (is the same as or has an integer multiple relationship with) the actual steel fiber, and the shape corresponds to that of the actual steel fiber. In one embodiment of the present invention, the diameter is 0.55 m.

[0073] Combination Figure 3 As shown, in one embodiment of the present invention, step 300 includes:

[0074] The concrete matrix is ​​composed of mortar and aggregate. In one embodiment of the present invention, the design gradation rules of the matrix include: the particle size of cement mortar is between 2 mm and 5 mm, and the volume fraction is 40%; the aggregate particle size is 5 mm to 20 mm continuously graded, wherein the volume fraction of 5 to 10 mm aggregate is 20%, the volume fraction of 10 to 16 mm aggregate is 20%, and the volume fraction of 16 to 20 mm aggregate is 20%. The concrete matrix is ​​divided into two groups, mortar and aggregate, for grading, and a discrete element simulation model of the concrete matrix is ​​generated in the determined target area.

[0075] Combination Figure 4 As shown, in one embodiment of the present invention, the rigid steel fiber as a defined simulation entity conforms to the actual target steel fiber in shape. A mathematical description is established according to the target steel fiber, and a rigid steel fiber simulation model of a single steel fiber is generated accordingly. In one embodiment of the present invention, the target steel fiber is an end hook type steel fiber, with a circular cross section, a diameter of 0.55 mm, and a length of 30 mm. The two ends of the main body of the steel fiber are axially symmetrical, and the main body is a cylinder, each end of which includes a bending section and a parallel section connected in sequence, the bending section and the main body are at an angle of 45 degrees, and the parallel section is parallel to the main body.

[0076] Combination Figure 5 As shown, in one embodiment of the present invention, in step 400, the process of forming a single rigid steel fiber simulation model includes:

[0077] The target steel fiber is discretized into a combination of a series of matching spheres, the diameter of the matching spheres is the same as the cross-sectional size of the steel fiber, the geometric linear figure formed by the connecting line of the centers of the matching spheres is the same as the actual shape of the steel fiber, and the matching spheres are tangent to each other. Specifically, in this embodiment, the diameter of the matching spheres constituting the steel fiber is 0.55 mm, which is the same as the actual diameter of the steel fiber. According to the target steel fiber size, the steel fiber can be discretized into 61 tangent matching spheres.

[0078] The coordinates of the center of the matching sphere are calculated based on the linear graph to form a mathematical model of the steel fiber. Specifically, in this embodiment, the left end point of the steel fiber is selected as the coordinate origin, and the coordinates of the center of 61 spheres are calculated to form a mathematical model of the target steel fiber.

[0079] The mathematical model of the target steel fiber is imported into the discrete element simulation software to generate a single rigid steel fiber simulation model. The matching spheres are defined as rigid connections that cannot be broken.

[0080] Combination Figure 6 As shown, in one embodiment of the present invention, in step 500, the process of forming the rigid steel fiber distribution simulation model includes:

[0081] Determine the unit content of steel fiber in the concrete matrix, the volume and mass of a single steel fiber, and determine the quantity of steel fiber to be added according to the calculation rules. Specifically, in this embodiment, the steel fiber content of the concrete matrix is ​​15kg / m 3 The volume of a single steel fiber is 7.6×10-9m 3 , the density of steel is taken as 7850kg / m 3 , combined with the volume of a single steel fiber, the mass of a single steel fiber is calculated to be 6.06×10 -4 kg.

[0082] The specific delivery quantity is determined according to the volume of the delivery target area and the calculation rules. Specifically, in this embodiment, the steel fiber delivery area is a cube with a volume of 0.004m 3 , steel fiber content is 15kg / m 3 , the mass of a single steel fiber is 6.06×10 -4 kg, the calculated number of steel fibers is 99.

[0083] A single rigid steel fiber simulation model is used as a template to randomly place the rigid steel fiber in the target area to form a rigid steel fiber distribution simulation model. According to the specific placement quantity and the rigid steel fiber simulation model, the occupancy calculation is performed on the concrete matrix discrete element simulation model to form a rigid steel fiber distribution simulation model that conforms to the random placement characteristics.

[0084] Combination Figure 7As shown, in one embodiment of the present invention, in step 600, the process of forming the deformable steel fiber distribution model includes:

[0085] Traverse the rigid steel fibers generated in the rigid steel fiber distribution simulation model, record the radius and spatial coordinates of all rigid steel fibers to form vector data, which is used as quantitative recording data.

[0086] The rigid steel fiber distribution simulation model is disassembled by a single rigid sphere, and the matching sphere is replaced by a single rigid sphere through vector data. After the replacement, the single rigid sphere is in a state of being adjacent but not connected to each other.

[0087] A contact model is applied between single rigid spheres to form a deformable steel fiber. The contact model can adopt a parallel bonding contact model to simulate the mechanical properties of the steel fiber.

[0088] Combination Figure 8 As shown, in one embodiment of the present invention, in step 700, forming a discrete element simulation model of steel fiber concrete includes:

[0089] The discrete element simulation model of the concrete matrix applies a contact model between the concrete matrix; the contact model can adopt a parallel bond contact model to simulate the mechanical behavior characteristics of the concrete matrix between cement mortar matrix particles and between aggregates and cement mortar matrix.

[0090] A contact model is applied between the concrete matrix and the deformable steel fibers according to the deformable steel fiber distribution model; the contact model may adopt a parallel bonding contact model to simulate the mechanical behavior characteristics between the steel fibers and the concrete matrix.

[0091] A discrete element simulation device for three-dimensional steel fiber concrete according to an embodiment of the present invention comprises:

[0092] A memory, used to store program codes in the process of processing the discrete element simulation method of three-dimensional steel fiber concrete in the above embodiment;

[0093] The processor is used to execute the program code in the processing process of the discrete element simulation method of three-dimensional steel fiber concrete in the above embodiment.

[0094] The processor may be a DSP (Digital Signal Processor) digital signal processor, an FPGA (Field-Programmable Gate Array) field programmable gate array, an MCU (Microcontroller Unit) system board, a SoC (system on a chip) system board, or a PLC (Programmable Logic Controller) minimum system including I / O.

[0095] A discrete element simulation device for three-dimensional steel fiber concrete according to an embodiment of the present invention is as follows Fig. 9 As shown. Fig. 9 In this embodiment, the present invention includes:

[0096] A coordinate space setting module 10 is used to determine the target area where the steel fibers are placed and record the spatial coordinates of the target area;

[0097] A sphere simulation setting module 20 is used to generate a single rigid sphere simulation model;

[0098] A matrix simulation setting module 30 is used to generate a discrete element simulation model of a concrete matrix according to a delivery target area;

[0099] A steel fiber simulation setting module 40 is used to generate a single rigid steel fiber simulation model according to the actual shape of the steel fiber;

[0100] A rigid distribution simulation setting module 50, for randomly placing rigid steel fibers in a placement target area according to quality requirements to form a rigid steel fiber distribution simulation model;

[0101] A deformable distribution simulation setting module 60 is used to disassemble the rigid steel fiber by a single rigid sphere to form a deformable steel fiber simulation model, and to replace the rigid steel fiber distribution simulation model to form a deformable steel fiber distribution model;

[0102] The concrete simulation setting module 70 is used to construct a steel fiber concrete discrete element simulation model according to the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

[0103] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A discrete element simulation method for three-dimensional steel fiber concrete, characterized in that: include: Determine the target area where the steel fiber is placed, and record the spatial coordinates of the target area; Generate a single rigid sphere simulation model; Generate a discrete element simulation model of the concrete matrix according to the target area for placement; Generate a single rigid steel fiber simulation model based on the actual shape of the steel fiber; According to the quality requirements, rigid steel fibers are randomly placed in the target area to form a rigid steel fiber distribution simulation model; A deformable steel fiber simulation model is formed by disassembling the rigid steel fiber through a single rigid sphere, and the rigid steel fiber distribution simulation model is replaced to form a deformable steel fiber distribution model; A steel fiber concrete discrete element simulation model is constructed based on the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

2. The discrete element simulation method of three-dimensional steel fiber concrete according to claim 1, characterized in that: The delivery target area adopts a rectangular coordinate space coordinate system to form a quantification of the three-dimensional scale and volume of the delivery target area.

3. The discrete element simulation method of three-dimensional steel fiber concrete according to claim 1, characterized in that: The physical properties of the single rigid sphere are set to be the same as those of the actual steel fiber, and the scale and shape correspond to those of the actual steel fiber.

4. The discrete element simulation method of three-dimensional steel fiber concrete according to claim 1, characterized in that: A discrete element simulation model of the concrete matrix is ​​generated in the target delivery area according to the design gradation of the concrete matrix.

5. The discrete element simulation method of three-dimensional steel fiber concrete according to claim 1, characterized in that: The formation of the single rigid steel fiber simulation model includes: The target steel fiber is discretized into a combination of a series of matching spheres, the diameter of the matching spheres is the same as the cross-sectional size of the steel fiber, the geometric linear figure formed by the connecting line of the centers of the matching spheres is the same as the actual shape of the steel fiber, and the tangency between the matching spheres is defined as a rigid connection that cannot be broken; The coordinates of the center of the matching sphere are determined by calculating the spatial coordinates according to the linear graph to form a mathematical model of the steel fiber; The mathematical model of the target steel fiber is imported into the discrete element simulation software to generate a simulation model of a single rigid steel fiber.

6. The discrete element simulation method of three-dimensional steel fiber concrete according to claim 1, characterized in that: The formation of the rigid steel fiber distribution simulation model includes: Determine the unit content of steel fibers in the concrete matrix, the volume and mass of individual steel fibers; Determine the specific quantity to be delivered based on the volume of the target area and calculation rules; A single rigid steel fiber simulation model is used as a template for random placement in the target area to form a rigid steel fiber distribution simulation model.

7. The discrete element simulation method for three-dimensional steel fiber concrete according to claim 1, characterized in that: The forming of the deformable steel fiber distribution model includes: Traverse the rigid steel fibers generated in the rigid steel fiber distribution simulation model, and record the radius and spatial coordinates of all rigid steel fibers to form vector data; The rigid steel fiber distribution simulation model is disassembled through a single rigid sphere, and the matching sphere is replaced by a single rigid sphere through vector data; A contact model is applied between single rigid spheres to form deformable steel fibers.

8. The discrete element simulation method for three-dimensional steel fiber concrete according to claim 1, characterized in that: The forming of the steel fiber concrete discrete element simulation model comprises: The discrete element simulation model of concrete matrix applies a contact model between the concrete matrix; A contact model is applied between the concrete matrix and the deformable steel fibers according to the deformable steel fiber distribution model.

9. A discrete element simulation device for three-dimensional steel fiber concrete, characterized in that: include: A memory for storing program codes in a process of processing a discrete element simulation method for three-dimensional steel fiber concrete as claimed in any one of claims 1 to 8; A processor is used to execute the program code.

10. A discrete element simulation device for three-dimensional steel fiber concrete, characterized in that: include: A coordinate space setting module is used to determine the target area where the steel fiber is placed and record the spatial coordinates of the target area; Sphere simulation setting module, used to generate a single rigid sphere simulation model; A matrix simulation setting module is used to generate a discrete element simulation model of a concrete matrix according to a target area for placement; A steel fiber simulation setting module is used to generate a single rigid steel fiber simulation model according to the actual shape of the steel fiber; A rigid distribution simulation setting module, used to randomly place rigid steel fibers in a placement target area according to quality requirements to form a rigid steel fiber distribution simulation model; A deformable distribution simulation setting module is used to disassemble the rigid steel fiber through a single rigid sphere to form a deformable steel fiber simulation model, and to replace the rigid steel fiber distribution simulation model to form a deformable steel fiber distribution model; The concrete simulation setting module is used to form a steel fiber concrete discrete element simulation model based on the concrete matrix discrete element simulation model and the deformable steel fiber distribution model.

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