Bridge structural damage identification method and system

Abstract

The invention discloses a bridge structure damage identification method and system. The method includes: collecting environmental variables and deflection information of the bridge structure; evaluating the health status of the bridge structure, judging whether damage identification is required and issuing a safety alarm; using a damage position identification model The damage position is identified; the damage degree is identified by using the damage degree identification model. The system includes a data acquisition module, a health status evaluation module, an alarm module, a damage location recognition module, a damage degree recognition module and a display module. The invention has a simple structure and is easy to implement, is applicable to various bridge structures, can provide bridge management departments with timely and detailed bridge structure health status information, and ensures safe operation of the bridge structure.

Description

technical field [0001] The invention relates to the technical field of bridges. Background technique [0002] In the past 20 to 30 years, various bridge accidents have occurred frequently in our country, and the more serious one is the sudden collapse of bridges, which has caused heavy casualties and property losses. There are many reasons for the collapse of the bridge, but it is certain that before the collapse of the bridge, due to the long-term action of various dynamic and static loads and the influence of various adverse environmental factors on certain key parts, the fatigue of the bridge structure, corrosion and aging of materials, As well as the lack of timely discovery and maintenance, the damage of the bridge structure will accumulate during the service period, and its stiffness will decline, which will seriously affect the service life of the bridge structure, and even seriously exceed the limit safety range of the design, leading to accidents. . It can be seen...

AI Technical Summary

Problems solved by technology

Although a large number of scholars at home and abroad have carried out the research, development and practical engineering application of the bridge structure health monitoring system, the safety assessment and damage identification are mainly based on theoretical results. Due to the complexity of the actual bridge structure and field environmental conditions, and the incompleteness of measured data The uncertainty of the bridge structure response caused by external disturbances, etc., make the actual application effect of the existing research results still have many unsatisfactory places.

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