Quantitative analysis of fracture process in RC column foundation by moment tensor analysis of acoustic emission |
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| Affiliation: | 1. School of Energy and Mining Engineering, China University of Mining & Technology Beijing, Beijing 100083, China;2. Key Lab on Safe Effective Coal Mining, Anhui University of Science and Technology, Huainan 232001, China;3. School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;4. Center for underground construction and tunneling, Colorado School of Mines, Golden, CO 80401, USA |
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| Abstract: | After the great Hanshin earthquake, numerous studies have been made to evaluate damage levels, toughness and deformation characteristics of reinforced concrete (RC) columns exposed to the earthquake shock. In the present study, RC columns are subjected to simulated seismic lateral loading under different axial loads. Acoustic emission (AE) is monitored to characterize the seismic behavior of column foundation. AE is shown to be very sensitive to detect cracks generated in the foundation. An AE moment tensor analysis is applied to analyze the fracture process quantitatively. Experimental results demonstrate different fracture behavior, depending on the different axial loads. It is also shown that the moment tensor analysis is very useful for quantitative evaluation of the fracture process. |
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