The invention discloses a bridge condition rapid rating method based on influence line recognition

Abstract

The invention discloses a bridge condition rapid rating method based on influence line recognition. The invention discloses a bridge condition rapid rating method, belongs to the field of bridge detection, and aims to provide a bridge condition rapid rating method capable of accurately and efficiently identifying bridge displacement influence, and the method is characterized by comprising the following steps: S1, calculating a theoretical influence line, and obtaining the theoretical influence line through finite element transient dynamics solution; S2, actual measurement influence lines are obtained, deflection time history data of the whole running process are obtained in real time, the test cross section is a midspan position, and the cross section is transversely arranged for 2-2 h; Three measuring points; S3, extracting a static load influence line, removing wavelet coefficients corresponding to the noise on each frequency band, keeping wavelet decomposition coefficients of the original signals, and performing wavelet coefficient reconstruction on the processed coefficients to obtain denoised signals; And S4, constructing a verification coefficient index, and carrying out bridge condition rating according to the verification coefficient index. The method is suitable for rapid rating of bridge conditions.

Description

technical field [0001] The invention relates to a rapid assessment method for bridge conditions, in particular to a rapid assessment method for bridge conditions based on influence line identification. Background technique [0002] The influence line is an inherent characteristic of the bridge, which has the characteristics of clear physical meaning, sensitivity to damage, and less obvious environmental changes. It contains rich local information of the bridge. The measurement influence line is often included in the bridge completion experiment of the new bridge and the inspection and evaluation of the old bridge. . It is well known that after a bridge has been in service for a period of time, structural degradation may occur, resulting in localized stiffness drops or other inherent property changes. Based on the measured results of the influence line, the rapid detection of the bridge bearing capacity and the rapid assessment of the health status of the bridge can be reali...

AI Technical Summary

Problems solved by technology

[0003] At present, scholars at home and abroad have carried out a lot of research work and extensive exploration on the measurement method of bridge influence lines, but there is still a lack of a generally recognized method that can accurately and efficiently identify bridge displacement influence lines

Images