Bridge structure damage identification method and system

Abstract

The invention discloses a bridge structure damage identification method and system; the method comprises the following steps: collecting flexibility information of environment variables and a bridge structure; evaluating the health state of the bridge structure, determining whether the bridge structure needs damage identification or not, and sending safety alarms; using a damage position identification model to identify damaged positions; using a damage level identification model to identify the damage level. The system comprises a data acquisition module, a health state evaluation module, an alarm module, a damage position identification module, a damage level identification module and a display module. The bridge structure damage identification system is simple in structure, easy to realize, suitable for various bridge structures, and can timely provide detail bridge structure health state information for a bridge management department, thus ensuring safety operation of the bridge structures.

Description

Technical field [0001] The invention relates to the technical field of bridges. Background technique [0002] In the past two to three decades, various bridge accidents have occurred frequently in our country. The more serious one is the sudden collapse of the bridge, 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 effects of various dynamic and static loads and the influence of various adverse environmental factors, the fatigue of the bridge structure, the 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 life 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, resulting in sudden accidents. . It can be seen that when...

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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