LOADING RATE DEPENDENCY OF COMPLETE STRESS-STRAIN CURVE OF VARIOUS ROCK TYPES
Loading rate dependency of stress-strain curve is closely related to time-dependent behaviors such as creep, stress relaxation and viscoelasticity. But it is difficult to research the loading rate dependency of complete stress-strain curve for rock. Recently a method was proposed, in which the loading rates were alternated between slow and fast rates at a uniform strain interval. This method is so simple that special equipment or technique isnt required. With the aid of this method, two stress-strain curves corresponding to two loading rates can be estimated from just one specimen. In this study, the alternating loading rate test was applied to compression and tension tests for not only Class I rock but also Class II rock, which has a positively inclined portion of the stress-strain curve in the post-failure region. Loading rate dependency of complete stress-strain curves of Class I and Class II rocks were examined. Experimental results indicate that this testing method can be adopted to research the loading rate dependency of complete stress-strain curve of Class I and Class II rocks under various stress state.
rock time-dependent behavior loading rate complete stress-strain curve post-failure region
M. Lei K. Hashiba S. Okubo K. Fukui
Doctoral student, Dept. of Systems Innovation, The University of Tokyo, Tokyo, Japan Assistant Professor, Dept. of Systems Innovation, The University of Tokyo, Tokyo, Japan Professor, Dept. of Systems Innovation, The University of Tokyo, Tokyo, Japan Associate Professor, Dept. of Systems Innovation, The University of Tokyo, Tokyo, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）