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Method and device for obtaining 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: 2022-06-24
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 obtaining ion concentration in concrete structure based on finite element method
  • Method and device for obtaining ion concentration in concrete structure based on finite element method
  • Method and device for obtaining ion concentration in concrete structure based on finite element method

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Embodiment 1

[0063] figure 1 It is a schematic flowchart of the method for obtaining the ion concentration in a concrete structure based on the finite element method in the embodiment of the present invention, such as figure 1 As shown, the method includes the following 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 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 ions are sulfate ions.

[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 concrete structures, and the diffusion of sulfate ions in the concre...

Embodiment 2

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

[0132]a first acquisition component 11, the first acquisition component 11 is used to acquire the partial differential equation of the diffusion model of any ion in the concrete structure;

[0133] a second obtaining component 12, the second obtaining component 12 is configured to obtain the weak form of the partial differential equation based on the partial differential equation;

[0134] a third obtaining component 13, the third obtaining component 13 is configured to perform unit division on the solution space domain, and obtain discrete unit finite element control equations based on the weak form of the par...

Embodiment 3

[0140] Based on the same inventive concept as the method for acquiring the ion concentration in a concrete structure based on the finite element method in the foregoing embodiment, the present invention also provides a device for acquiring the ion concentration in a concrete structure based on the finite element method, which stores a A computer program that, when executed by a processor, implements the steps of any one of the aforementioned methods for obtaining the ion concentration in a concrete structure based on the finite element method.

[0141] Among them, in Figure 5 In the 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 are linked together. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, ...

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Abstract

The invention discloses a method and device for obtaining ion concentration in a concrete structure based on a finite element method. The method includes: obtaining a partial differential equation of a diffusion model of any ion in a concrete structure; obtaining the ion concentration based on the partial differential equation. The weak form of the partial differential equation; the solution space domain is divided into units, and the discrete element finite element control equation is obtained based on the weak form of the partial differential equation; the solution time domain is discretized, and based on the discrete unit The finite element control equation obtains the matrix iterative solution form of the discrete element finite element control equation; based on the time step iterative calculation and the matrix iterative solution form, the ion concentration in the concrete structure is obtained. The invention adopts quadrilateral eight-node and other parameter units to divide and solve the space domain, can better simulate the structure of the curved boundary, and realizes the beneficial effect of accurately obtaining the ion concentration in the concrete structure with the shape of the curved boundary.

Description

technical field [0001] The invention relates to the field of concrete materials, in particular to a method and device for acquiring ion concentration in a concrete structure based on a finite element method. Background technique [0002] Sulfate corrosion is an important factor leading to the deterioration of concrete material durability 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 huge, and these basic projects are closely related to concrete materials and structures. However, the service environment of sulfate-type engineering in my country is widely distributed. In the environment, sulfate ions diffuse into the concrete structure and corrode the concrete material, resulting in the reduction of its mechanical properties and the early 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 Patents(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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