A method for monitoring information security assessment of in-service bridges

Abstract

The invention discloses a method for assessing the safety of bridge monitoring information in service, which includes: analyzing the internal relationship between the structural response signal and the state evolution of the bridge structure, digging out the essential connotation of the bridge monitoring information, constructing the bridge monitoring information time series; establishing the echo state The network bridge monitoring information characteristic model is used as the bridge structure state characteristic system; the bridge structure damage sensitivity index is constructed, and the critical parameters of damage evolution are obtained; the bridge state evolution model is constructed; and the bridge safety assessment is carried out. The invention integrates information science, data mining, pattern recognition and other multidisciplinary knowledge, realizes multidisciplinary crossover and integration, and provides beneficial exploration and technical support for further improving the application quality of bridge health monitoring system and the research direction of bridge state assessment .

Description

technical field [0001] The invention belongs to the field of bridge information monitoring, and in particular relates to a new technology for bridge safety state assessment based on bridge structure health monitoring information. Background technique [0002] With the emergence of computers in the 1940s and the rise of artificial intelligence in the 1950s, people hoped to use computers to replace or expand part of human mental work. Pattern recognition rapidly developed into a relatively complete subject area in the early 1960s. It is also the intersection of multidisciplinary fields, involving statistics, fuzzy set theory, engineering, artificial intelligence, computer science, etc. Structural damage diagnosis is the continuation and application of pattern recognition theory in the engineering field. Its essence is "state recognition", that is, to solve the classification problem of different states of the same structural system. Therefore, the application of SHM statistica...

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Problems solved by technology

[0003] Due to the large and complex civil structure and the harsh environment, the sensor is inevitably affected by various disturbances in the surrounding environment during the actual acquisition process, and these disturbances often cause misjudgment of structural damage, which hinders the use of damage identification methods in actual engineering. Therefore, it is necessary to introduce statistical theory in damage identification to carry out statistical analysis on the results of damage identification, and to replace the traditional deterministic identification of structural damage with statistical identification of structural damage.

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