Corrosion monitoring device and method for reinforcement bar in concrete structure

Abstract

The invention relates to a corrosion monitoring device and method for a reinforcement bar in a concrete structure. The device comprises at least three fiber grating strain transducers, a signal processing unit, a stainless steel bevel support and conductors, wherein the fiber grating strain transducers are sequentially arranged on the bevel of the bevel support; and signals acquired by all the fiber grating strain transducers are sent to the signal processing unit through the conductors. According to the invention, the fiber grating strain transducers arranged by adopting a special method can measure tensile strain caused by a corrosion expansion force generated by corrosion products of the reinforcement bar in a concrete cover and derive the corrosion rate and the initial corrosion time t0 of the reinforcement bar so as to indirectly monitor the corrosion condition of the reinforcement bar. The corrosion monitoring device for the reinforcement bar is convenient to arrange, higher in test result precision and better in reliability, and can realize long-term real-time on-line nondestructive monitoring of the common concrete structure.

Description

technical field [0001] The invention relates to the technical field of analysis and measurement control, in particular to a device and method for monitoring the corrosion of steel bars in a concrete structure. Background technique [0002] Reinforced concrete structures are one of the most widely used types of structures in civil engineering. The factors that affect the durability of concrete structures are complex, and they are coupled with each other. A large number of engineering structural disease studies have shown that steel corrosion is the most important factor affecting the durability of concrete structures. Professor Mehta pointed out: "In today's world, the reasons for the destruction of concrete structures are, in order of decreasing importance: corrosion of steel bars, freezing damage in cold climates, and physical and chemical effects of eroding the environment". The premature failure of concrete structures caused by corrosion of steel bars has become a majo...

AI Technical Summary

Problems solved by technology

However, the sensor proposed by Yan Yun and the double-bar corrosion grating sensor proposed by Li Jun fix the fiber grating on the steel bar to directly monitor the steel bar corrosion, which has higher requirements for the pretreatment of the steel bar and the protection of the steel bar during the construction process. , and it is not convenient to deploy sensors, and at the same time increases the difficulty of monitoring

In addition, in the tests conducted by Yan Yun and Liu Hongyue, the environment of steel corrosion monitoring is not in concrete. Due to the difference in the environment, there may be some differences in the results of steel corrosion monitoring.

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