Nondestructive testing system and method for fatigue cracks of orthotropic steel bridge deck

Abstract

The invention discloses a nondestructive testing system for fatigue cracks of an orthotropic steel bridge deck, the nondestructive testing system comprises an embedded RFID electronic tag for detecting and recording steel bridge deck fatigue crack information and transmitting the information to a reader-writer through RFID near field communication; the reader-writer which provides energy for the electronic tag, performs wireless communication and can read or write tag identification codes and detection information; an upper computer which is mainly used for providing instructions for the reader-writer and displaying, storing and processing label information returned by the reader-writer; and a mobile carrier which is used for carrying the reader-writer and the upper computer and carrying out fatigue crack detection during movement. The invention further discloses a method for detecting the fatigue cracks of the orthotropic steel bridge deck based on the nondestructive testing system. According to the invention, nondestructive testing of the fatigue crack of the orthotropic steel bridge deck can be completed on the bridge deck, information of time and extension length of the fatigue crack penetrating through the bridge deck can be obtained in time, the detection speed is high, the efficiency is high, and the detection cost is controllable.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of steel structures, in particular to a system and method for non-destructive testing of fatigue cracks on orthotropic steel bridge decks. Background technique [0002] Orthotropic steel bridge deck systems are increasingly used in bridge engineering, but they are always accompanied by prominent fatigue problems due to geometric discontinuity of welding details, residual stress effects, welding defects and other factors. Among them, the welded joint between longitudinal rib and bridge deck is one of the two most prominent parts of the fatigue problem of orthotropic steel bridge deck system. Fatigue cracks on the upper surface of the bridge deck are the most common fatigue failure mode in this part. [0003] Once fatigue cracks penetrate the bridge deck, it will lead to a decrease in the local stiffness of the bridge deck, which in turn will cause cracks and collapse of the pavemen...

AI Technical Summary

Problems solved by technology

Under the bridge deck, because the testing environment is very complex and the working surface is often limited (such as the fatigue cracks of closed ribs starting from the welding root of the rib plate and extending to the bridge deck), it will also make it difficult to use the commonly used testing methods or reduce the efficiency. Serious problems with cost

It is above the bridge deck, so there is no problem with the working surface, but due to the coverage of the bridge deck pavement, unless the pavement is removed, it is difficult to use these detection methods to carry out inspections on the bridge deck

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