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Structural Engineering and Mechanics Volume 79, Number 4, August25 2021 , pages 487-498 DOI: https://doi.org/10.12989/sem.2021.79.4.487 |
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Stability analysis of rock slopes using strength reduction adaptive finite element limit analysis |
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Guang-hui Chen, Jin-feng Zou and Rui Zhang
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| Abstract | ||
| The main aim of this study is to propose an effective approach to conduct the stability analysis of rock slopes. Based on the strength reduction technology, the recent developed adaptive finite element limit analysis is adopted to investigate the stability of rock slopes for the first time. The rock mass strength is described by the latest generalized Hoek-Brown failure criterion. To better estimate the rock slope stability, the rock mass disturbance D and slope angle B are also incorporated into the determination of factor of safety by implementing the disturbance weighting factor s and the slope angle weighting factor fB, respectively. The factors of safety obtained from this study are validated by those from existing works based on two real slope cases. For practical use, the factors of safety for the cases of B=45o in undisturbed rock masses are provided in the form of design charts. Finally, a set of design charts for s and a fitting formula for fB are presented and discussed. | ||
| Key Words | ||
| adaptive finite element limit analysis; factor of safety; generalized Hoek-Brown failure criterion; stability of rock slopes; strength reduction technology | ||
| Address | ||
| Guang-hui Chen, Jin-feng Zou: School of Civil Engineering, Central South University, No.22, Shaoshan South Road, Changsha, Hunan Province, People's Republic of China Rui Zhang: School of Civil Engineering, Changsha University, No.98, Hongshan Road, Changsha, Hunan Province, People's Republic of China | ||