Damage analysis of CFRP-confined circular concrete-filled steel tubular columns by acoustic emission techniques
作者： Dongsheng Li , Zhi Chen , Quanming Feng , Yanlei Wang
DOI: 10.1088/0964-1726/24/8/085017
关键词: Amplitude 、 Energy (signal processing) 、 Frequency analysis 、 Intensity (heat transfer) 、 Materials science 、 Composite material 、 Rise time 、 Structural engineering 、 Acoustic emission 、 Bearing capacity 、 Waveform
摘要: Damage properties of carbon fiber-reinforced polymer (CFRP) confined circular concrete-filled steel tubular (CCFT) columns were analyzed through acoustic emission (AE) signals. AE characteristic parameters obtained axial compression tests. The severity damage to CFRP-CCFT was estimated using the growing trend accumulated energy as basis. bearing capacity and improved CFRP layers increased. process studied a number crucial parameters. cracks' mode can be differentiated ratio rise time waveform amplitude average frequency analysis. With use intensity signal analysis, classified into three levels that represent different degrees. Based on b-value development cracks defined. Thus, identifying an initial yielding providing early warning is possible.
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