Method and device for acquiring ion concentration in concrete structure based on finite element method

A technology of concrete structure and finite element method, which is applied in the field of concrete materials, can solve the problems of inapplicability, poor adaptability of boundaries of complex geometric shapes, etc.

Active Publication Date: 2021-01-22
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present application provides a method and device for obtaining ion concentration in concrete structures based on finite element method, which solves the problem in the prior art that the method for obtaining ion concentration in concrete structures based on finite element method adopts a single grid division method , poor adaptability to complex geometry boundaries, leading to technical problems of not being applicable to concrete structures with curved boundary shapes

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  • Method and device for acquiring ion concentration in concrete structure based on finite element method
  • Method and device for acquiring ion concentration in concrete structure based on finite element method
  • Method and device for acquiring ion concentration in concrete structure based on finite element method

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Embodiment 1

[0063] figure 1 It is a schematic flow chart of a method for obtaining ion concentration in a concrete structure based on the finite element method in an embodiment of the present invention, as figure 1 Shown, described method comprises the steps:

[0064] Step 110: Obtain the partial differential equation of the diffusion model of any ion in the concrete structure.

[0065] Further, the ions are ions such as sulfate ions, chloride ions or calcium ions that diffuse into the concrete structure from the service environment during the service process of the concrete structure, and in this embodiment, the The ion is the sulfate ion.

[0066] Specifically, the step 110 specifically includes the following steps:

[0067] Step 111: Based on Fick's second law and the law of conservation of mass, and considering the consumption of sulfate ions by chemical reactions, establish a diffusion model of sulfate ions in the concrete structure, and the diffusion of sulfate ions in the concre...

Embodiment 2

[0131] Based on the same inventive concept as the method for obtaining ion concentration in a concrete structure based on the finite element method in the foregoing embodiments, the present invention also provides a device for obtaining ion concentration in a concrete structure based on the finite element method, such as Figure 4 As shown, the device includes:

[0132]The first acquisition part 11, the first acquisition part 11 is used to obtain the partial differential equation of the diffusion model of any ion in the concrete structure;

[0133] A second acquisition component 12, configured to acquire a weak form of the partial differential equation based on the partial differential equation;

[0134] The third acquisition component 13, the third acquisition component 13 is used to divide the solution space domain into units, and obtain the discrete element finite element control equation based on the weak form of the partial differential equation;

[0135] The fourth acqu...

Embodiment 3

[0140] Based on the same inventive concept as the method for obtaining ion concentration in concrete structures based on finite element method in the foregoing embodiments, the present invention also provides a device for obtaining ion concentration in concrete structures based on finite element method, on which is stored A computer program, when the program is executed by the processor, implements the steps of any method of the method for obtaining the ion concentration in the concrete structure based on the finite element method described above.

[0141] Among them, in Figure 5 In, bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 will include one or more processors represented by processor 302 and various types of memory represented by memory 304 circuits linked together. The bus 300 may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, etc...

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Abstract

The invention discloses a method and a device for acquiring ion concentration in a concrete structure based on a finite element method. The method comprises the following steps: acquiring a partial differential equation of a diffusion model of any ion in the concrete structure; obtaining a weak form of the partial differential equation based on the partial differential equation; carrying out unitdivision on a solving space domain, and obtaining a discrete unit finite element control equation based on the weak form of the partial differential equation; discretizing the solving time domain, andobtaining a matrix iterative solving form of the discrete unit finite element control equation based on the discrete unit finite element control equation; and obtaining the concentration of the ionsin the concrete structure based on time step iterative computation and the matrix iterative solution form. Parameter units such as eight nodes of a quadrangle are adopted to divide and solve a spatialdomain, the structure of the bent boundary can be well simulated, and the beneficial effect of accurately obtaining the ion concentration in the concrete structure containing the bent boundary shapeis achieved.

Description

technical field [0001] The invention relates to the field of concrete materials, in particular to a method and device for obtaining ion concentration in concrete structures based on the finite element method. Background technique [0002] Sulfate attack is an important factor leading to the degradation of the durability of concrete materials and the reduction of structural service performance. In recent years, with the rapid development of my country's national economy, the construction scale of infrastructure projects is unprecedentedly large, and these basic projects are closely related to concrete materials and structures. However, the service environments of sulfate-type projects in my country are widely distributed. Sulfate ions in the environment diffuse into the concrete structure and corrode the concrete material, resulting in a decrease in its mechanical properties and premature failure of the structure. Therefore, it is extremely important to study the diffusion p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 殷光吉缪玲温小栋冯蕾律清
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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