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Corrosion pit fusion-based rusted steel analysis method and application thereof

An analysis method and pitting technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as not being raised

Pending Publication Date: 2022-02-11
STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, no related methods have been proposed in the existing research to solve the above problems

Method used

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  • Corrosion pit fusion-based rusted steel analysis method and application thereof
  • Corrosion pit fusion-based rusted steel analysis method and application thereof
  • Corrosion pit fusion-based rusted steel analysis method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135]

[0136] combined with Figure 11 As shown, the method for analyzing the bearing capacity of corroded steel based on corrosion pit fusion proposed by the present application includes the following steps:

[0137] Step 1, select the partial area of ​​the actual corroded steel, and investigate the situation of its corrosion pits; through statistics, obtain the statistical parameters of the corrosion pits and the mass loss rate η of this area 0 ;

[0138] The statistical parameters of the rust pits are: the average value and variance of the corrosion depth h; the average value and variance of the corrosion width c;

[0139] Step 2, determine the number of corrosion pits of the entire steel member;

[0140] Step 3, create a finite element model considering corrosion pits:

[0141] Using ABAQUS software to establish a finite element model with random pitting distribution, the statistical parameters of the corrosion pits obtained in step 1, the number of corrosion pits o...

Embodiment 2

[0146]

[0147] Step 2 of Embodiment 1 has two methods.

[0148] The first way:

[0149] First calculation:

[0150] First, it is assumed that the number of corrosion pits in the entire steel member is n 1 ;

[0151] Secondly, based on the statistical parameters of the corrosion pits obtained in step 1, the finite element model of the entire steel member is established, and the mass loss rate η of the finite element model is calculated 1 ;

[0152] If|(η 0 -η 1 ) / η 0 |1 is the number of corrosion pits of the entire steel member, stop calculation;

[0153] If|(η 0 -η 1 ) / η 0 |>5%, carry out the second calculation;

[0154] Second calculation:

[0155] First, it is assumed that the number of corrosion pits in the entire steel member is n 2 (n 1 not equal to n 2 );

[0156] Secondly, based on the statistical parameters of the corrosion pits obtained in step 1, the finite element model of the entire steel member is established, and the mass loss rate η of the fin...

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Abstract

The invention discloses a corrosion pit fusion-based rusted steel analysis method and an application thereof, and belongs to the technical field of steel structures, and the technical key points are as follows: firstly, selecting a partial region of actual rusted steel, and investigating the condition of a corrosion pit of the actual rusted steel; obtaining statistical parameters of the corrosion pit and the mass loss rate eta0 of the area through statistics; then, determining the number of corrosion pits of the whole steel component; and finally, creating a finite element model considering the corrosion pit. By means of the method, the bearing capacity and the deformation condition of the corroded steel beam or steel column or steel support can be well calculated.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a method for analyzing corroded steel based on corrosion pit fusion and its application. Background technique [0002] With the increase of steel production and the maturity of steel structure design theory, the number and scale of China's steel structure projects are increasing year by year. However, the durability of steel structures is poor, and steel structure projects that have been exposed to corrosive environments such as oceans and industrial atmospheres for a long time are prone to corrosion problems. [0003] Corrosion of steel structures leads to damage and performance degradation of steel under the action of the environment. The corrosion is destructive, resulting in a decline in the bearing capacity of buildings, and even causes collapse, resulting in huge losses of life and property. [0004] A common method to evaluate the bearing capacity of corroded steel...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F119/02
CPCG06F30/23G06F2119/02
Inventor 傅本钊于新民赵贇林瑞宗刘志伟施孝霖聂克剑吴泽燕郭琪
Owner STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RES INST