ABSTRACT

The purpose of this research is to verify our proposed mathematical model for estimating the dynamic shear strength of rocks and to establish an evaluation procedure for obtaining dynamic shear strength. Monotonic loading tests and cyclic loading tests of natural tuff were conducted to obtain the mathematical model parameters. Then multistep shear tests under cyclic and seismic-wave loadings were performed, followed by simulations using the mathematical model. The test results showed the dynamic strength exceeding the static strength, agreeing with previous research. Furthermore, the dynamic strength calculated from the mathematical model of natural tuff was generally consistent with the dynamic strength obtained from the experimental data.