Comprehensive monitoring method of reinforced concrete beams based on acoustic emission
At present,China's civil engineering construction projects have transitioned from a high-speed development stage to a high-quality development stage,and the construction projects around the 21st century have basically entered the maintenance and upkeep stage.In order to understand the mechanical changes in each stage of the building and explore the changes in acoustic emission sig-nals at each stage when reinforced concrete beams are damaged,this study takes cross-sectional ar-ea and concrete strength as variables,Using acoustic emission technology to detect the damage process of four concrete specimens and analyze the collected acoustic emission parameters.The re-lease of acoustic emission energy,cumulative energy,and other parameters can accurately reflect the failure stage of the beam.Under different variables of the specimen,the data trend obtained during the entire experimental process is basically the same.As the strength of concrete increases,the energy required for failure and the fluctuation frequency of ib value also increase.An increase in cross-sectional area will result in a relative increase in energy and ib value.The ib value of a-coustic emission,compared to the b value,can more accurately reflect the damage situation of specimens at various stages,and can provide a certain reference for the evaluation of structural health in engineering.Through the comparison of the three methods,a comprehensive method suitable for the whole process was selected.
Acoustic emission signalAccumulated energyB valueib value
万方数据
维普
