Attenuation of acoustic emission propagation along a steel strand embedded in concrete

作者：Li, Fumin^*; Huang, Lang; Zhang, Huanxi; Yang, Tai

来源：KSCE Journal of Civil Engineering, 2018, 22(1): 222-230.

DOI：10.1007/s12205-017-0844-y

• concrete
• steel strand
• acoustic emission propagation
• attenuation

Acoustic Emission (AE) technology may be used to quantify the accumulative crack damage of reinforcements, where, the attenuation of AE signal are needed to be studied for predicting the original AE strength with the received AE signal. Four groups of AE attenuation experiments on a steel strand embedded in concrete are conducted in this study to examine the basic influence of propagation length and the effect of the concrete status, such as cover layer depth, water-cement ratio, and saturation degree of pore water. Results show that AE strength (reflected by the parameters energy, amplitude, duration, and ringing count) attenuates with propagation length through an exponential function relation. The attenuation rate of AE strength increases with the increase in cover layer depth and water-cement ratio in an approximate exponential function and linear relations, respectively, and decreases with the increase in the saturation degree of pore water in an approximate elliptic function relation. General attenuation models of the four AE parameters were built based on the experimental results.

• 出版日期2018-1
• 单位深部岩土力学与地下工程国家重点实验室; 中国矿业大学（北京）