Abstract
In this study, inclined plane shaking table tests were carried out to estimate both static and dynamic friction angle of saw-cut rock joints under dynamic loading conditions. Accelerations and displacements of sliding rock block were obtained in the tests. The static friction angle was back-calculated by measuring yield acceleration at the onset of slide. The dynamic friction angle was estimated by closely approximating the experimental results to the program-simulated response. The tilt angle was also determined prior to dynamic test. As a result of dynamic testing, the static friction angle at the onset of slide as well as the dynamic friction angle during sliding were estimated to be significantly lower than the tilt angle. The difference between the tilt angle and other friction angles under dynamic condition was influenced by the magnitude and amplitude of base acceleration and inclination angle. (A) This paper was presented at Safety in the underground space - Proceedings of the ITA-AITES 2006 World Tunnel Congress and the 32nd ITA General Assembly, Seoul, Korea, 22-27 April 2006. For the covering abstract see ITRD E129148. Reprinted with permission from Elsevier.
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