Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fractal Characteristics and Failure Analysis of Geomechanical Model for Arch Dam Based on Acoustic Emission Technique
The acoustic emission (AE) technique is a significant way to study cracking and failure processes in the arch dam geomechanical model test. A failure analysis method based on AE signal fractal characteristics is presented. First, uniaxial tests were conducted on cylindrical specimens made of similitude material used in model masonry. The experiment indicated that AE fractal characteristics can be used to analyze failure processes that are similar to those of rock specimens. Then, the AE technique was introduced into the geomechanical model test. The fractal characteristic of the AE time series during the overload process was analyzed. When the overload factor K changed, the variation of the correlation dimension was combined with the failure mode of the arch dam to summarize the relationship between the failure process and fractal characteristics. The result indicated that the fractal characteristics changed sharply as large-scale cracks occurred or the stress state altered for the model. AE fractal characteristics can be a criterion to evaluate the overall safety of the dam. Changes in the fractal dimension are precursors to arch dam cracking and failure.
Fractal Characteristics and Failure Analysis of Geomechanical Model for Arch Dam Based on Acoustic Emission Technique
The acoustic emission (AE) technique is a significant way to study cracking and failure processes in the arch dam geomechanical model test. A failure analysis method based on AE signal fractal characteristics is presented. First, uniaxial tests were conducted on cylindrical specimens made of similitude material used in model masonry. The experiment indicated that AE fractal characteristics can be used to analyze failure processes that are similar to those of rock specimens. Then, the AE technique was introduced into the geomechanical model test. The fractal characteristic of the AE time series during the overload process was analyzed. When the overload factor K changed, the variation of the correlation dimension was combined with the failure mode of the arch dam to summarize the relationship between the failure process and fractal characteristics. The result indicated that the fractal characteristics changed sharply as large-scale cracks occurred or the stress state altered for the model. AE fractal characteristics can be a criterion to evaluate the overall safety of the dam. Changes in the fractal dimension are precursors to arch dam cracking and failure.
Fractal Characteristics and Failure Analysis of Geomechanical Model for Arch Dam Based on Acoustic Emission Technique
Zhang, Ying (Autor:in) / Liu, Yaoru (Autor:in) / Tao, Zhuofu (Autor:in) / Zhou, Haowen (Autor:in) / Yang, Qiang (Autor:in)
04.09.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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