Abstract:Abstract: The setting of hardware parameters, filtering parameters for acoustic emission (AE) acquiring system, and the AE parameters as well as their correlations are studied systematically by experiments, 11 groups of pensile lead break tests and 13 concrete specimens loaded in uniaxial tension are carried out. Feature parameters and waveforms of AE signals acquired by 3 kinds of sensors during the processes of tests are stored using parameter-waveform system. The test data are analyzed using both parameter combined with waveform analysis method and the post-extracting technique for waveforms. The results show that: there are reasonable values for the gain value of preamplifier, threshold, the sampling rate, sampling length and band pass filter; amplitude, count, duration, AE signal energy, absolute energy and signal strength are suitable for evaluating the phased damage feature of concrete under uniaxial tension loading; the significant correlations among amplitude, count, duration, rise time and signal strength are found. The study results of this paper can provide reference for the study of concrete failure process using AE technology.
吴胜兴;王岩;李佳;沈德建. 混凝土静态轴拉声发射试验相关参数研究[J]. , 2011, 30(5): 196-204.
Wu Shengxing; Wang Yan; Li Jia; Shen Dejian. Research on Parameters in Acoustic Emission Experiment of Concreteunder Static Uniaxial Tension. , 2011, 30(5): 196-204.