Safety assessment method for bridge health condition

Abstract

The invention relates to a safety assessment method for a bridge health condition. The method comprises: selecting assessment measuring points and obtaining signal data reflecting a bridge structure state through a sensor; performing statistical analysis on data signals collected by the sensor continuously for a plurality of days, to obtain a dynamic threshold; performing dimensionless processingon each measuring point by the dynamic threshold, to obtain a score of each measuring point; establishing a layered weighted model, including combined with the type, position, and detection index of each sensor, giving a multi-layer weighted model, using the model as a bridge health and safety assessment basis and index. The method realizes real-time scoring of the bridge health condition assessment, reduces human workload, and can give more timely and objective scientific scoring, and realizes daily routine assessment of the bridge health condition and timely assessment after occurrence of major accidents. The method has better accuracy and pertinence.

Description

technical field [0001] The invention belongs to the technical field of bridge safety monitoring, and relates to a method for safety evaluation of bridge health status. Background technique [0002] Bridge engineering is a lifeline project related to the coordinated development of society and economy. Especially with the rapid development of expressways in our country, and the completion of all 12 national trunk lines of the "five vertical and seven horizontal" national highways, the development focus of the bridge industry will gradually shift from "new construction" to "management and maintenance". However, in recent years, due to the significant effects of factors such as overloading, collisions, illegal operations, natural disasters or environmental changes, the number of dangerous bridges in my country has remained high, and major infrastructure safety accidents at home and abroad have occurred frequently. In addition, 40% of the bridges in our country were built in the...

AI Technical Summary

Problems solved by technology

[0003] Limited by the previous research and technical level, the previous health assessment of bridge monitoring was often based on manual inspection, and the overall health status of the bridge was only assessed in half a year or a year. Subjective judgment, and it takes a lot of manpower and time to conduct an evaluation, the evaluation time interval is too long, it is not real-time, the timeliness is poor, and the evaluation effect is not objective and scientific

In addition, the traditional bridge evaluation method is obtained by directly scoring components. Bridge components are generally large in size, such as main girders and slabs. Using one score to manually evaluate the entire component has poor accuracy and the classification method is rough.

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