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论文类型：期刊论文

发表时间：2013-01-01

发表刊物：Journal of Theoretical and Applied Information Technology

收录刊物：Scopus

卷号：48

期号：3

页面范围：1358-1365

ISSN号：19928645

摘要：Soil stability problems caused by vibratory loading, such as that of earthquakes and wind, have been increasingly observed. Designs and developments, which include a soil dynamic triaxial testing apparatus and a triaxial sample surface dynamic deformation measurement method based on the digital image processing technology, have been proposed to study the characteristics of soil under dynamic loads. The sub-pixel coordinates of corner points of squares on rubber membrane wrapping soil sample can be extracted using a high-speed camera that synchronously shoots images of soil surface dynamic deformation combined with the Canny operator and the Harris method. In accordance with the concept of the four-node isoparametric element in a finite element analysis, the dynamic deformation of soil sample can be calculated. The test results show that the dynamic deformation measurement method involving the use of digital image processing technology is effective in measuring the characteristics of the axial and radial deformation of the strain field, thereby provides a strong experimental foundation to study the mechanical characteristics of soil samples. ? 2005 - 2013 JATIT & LLS. All rights reserved.