A beam bridge safety monitoring and evaluating device

Abstract

The invention provides a beam bridge safety monitoring and evaluation system, which is used for monitoring dynamic strain information on a plurality of monitoring sections of a bridge and evaluating whether the structure of the bridge is safe or not, and is characterized by comprising a strain information acquisition device havingdynamic strain gauge for acquiring the dynamic strain information; astrain information acquisition device which comprises an acquisition side communication part used for sending dynamic strain information to the strain information management device, and the strain information management device comprises a strain information processing part used for obtaining a strain response curve of the dynamic strain information; A threshold value storage unit in which a threshold value interval is stored; The response amplitude acquisition part is used for acquiring the strain response amplitude of the acquisition channel; The strain distribution calculation part is usedfor calculating to obtain strain distribution on the monitored cross section; The safety index calculation part is used for calculating a neutral axis index; And the structure safety judgment part isused for judging whether the structure of the bridge is safe.

Description

technical field [0001] The invention relates to the field of structural safety monitoring, in particular to a girder bridge safety monitoring and evaluation device. Background technique [0002] my country is the country with the largest number of highway bridges in the world. According to the statistical information of the Ministry of Transport, by the end of 2016, there were 805,300 highway bridges in my country, with a cumulative length of 49.1697 million linear meters. The girder bridge occupies an unshakable main position in the highway bridge. With the increase of bridge service life, a large number of newly built bridges are gradually entering the "aging" stage, and various forms of structural degradation inevitably occur. It can be seen that it is urgent to carry out research on safety monitoring of girder bridges under operating conditions. By selecting reasonable and common safety indicators for long-term monitoring, the structural degradation process of the tar...

AI Technical Summary

Problems solved by technology

For example, the traditional strain gauge monitors the strain of structural points, and the spatial resolution is too low, resulting in insufficient damage recognition rate. At the same time, due to the influence of noise and ambient temperature, the strain signal will drift with time, so the traditional monitoring method is not very accurate. reflect the structural state of the design

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