Real-Time Visual Analyses on Failure Criteria of Slope Stability in Strength Reduction Finite Element Method

Abstract

The failure criteria in strength reduction FEM are not unified and often affected greatly by researcher’s experience and judgment, so it is necessary to discuss the applicability and the difference of some various criteria of instability of slope. According to the thought of visualization in real time computing, the corresponding visual program is developed based on some common failure criteria adopted simultaneity in the strength reduction FEM. Then, through the real-time visual interface, the comparisons of the common failure criteria are conducted. The results show that, the safety factor of a simple slope can be determined clearly from the inflection point of the computational curve based on the criterion of the characteristic nodal displacement and the criterion of equivalent plastic strain exceeding a certain value, by contrast, the safety factor which based on the criterion of the iteration non-convergence lag behind the others in the same condition.

Research on a Non-Synchronous Coordinated Reduction Method for Slopes Based on the Hoek–Brown Criterion and Acoustic Testing Technology

“…The parameters of cohesion (c) and the internal friction angle (ϕ) maintain consistent weakening and contribution ratios throughout the progressive degradation of the geotechnical body; in this way, the aforementioned process may appear straightforward. However, it fails to align with actual slope failure phenomena [22][23][24][25][26]. Practical experiments have shown that the cohesion (c) and the internal friction angle (ϕ) do not reach their peak strength and critical limit at the same time, and different reduction coefficients should be used for the double-parameter reduction with respect to the double-strength parameter characteristics and weakening mechanisms [27,28].…”