Rusted beam model correction and damage identification method

A damage identification and beam model technology, applied in the field of safety risk assessment, can solve the problems of component damage or even damage, the complexity of index determination, and no solution method, so as to achieve intuitive evaluation results, improve convergence speed, and avoid blindness. Effect
CN113283144APending Publication Date: 2021-08-20QINGDAO TECHNOLOGICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO TECHNOLOGICAL UNIVERSITY
Publication Date
2021-08-20

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Abstract

A rusted beam model correction and damage identification method relates to the technical field of safety risk assessment, and comprises the following steps: step 1, establishing a finite element model, performing sensitivity analysis on to-be-corrected parameters, and determining final corrected parameters according to a sensitivity analysis result; step 2, correcting the finite element model step by step according to an extreme learning machine algorithm improved based on a sparrow search algorithm; and step 3, according to the corrected finite element model, carrying out damage identification on the rusted beam according to an extreme learning machine algorithm improved based on a sparrow search algorithm. According to the method, the extreme learning machine algorithm improved based on the sparrow search algorithm is adopted to carry out model correction and model damage identification after corrosion on the model before corrosion, and the accuracy of finite element model correction output parameters and damage identification results is greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of safety risk assessment, in particular to a corroded beam model correction and damage identification method. Background technique

[0002] The main cause of failure of concrete structures is the corrosion of steel bars. Chloride ions in the external environment seriously threaten the durability of its structure, making the structure vulnerable to damage and even collapse, which has become a major hidden danger to life and property safety. With the continuous development of my country's sea-crossing bridges and coastal buildings and other building structures, many bridges and coastal buildings have been in the marine environment for a long time. At the same time, chlorine salt is widely used as a deicing agent in my country on winter roads in severe cold areas. There are a large number of corrosion phenomena of steel bars caused by chloride ion corrosion in China.

[0003] The pre-corrosion model correctio...

Claims

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