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Numerical Study on Thermally-Induced Displacement Ratcheting of a Thin Rock Slab
Temperature fluctuation in nature, either daily or seasonal, is capable of inducing a cycle of volumetric expansion and contraction of materials that are exposed to such an environment. Natural- and cut-rock slopes are also likely to experience such a cyclic temperature fluctuation. In many cases, however, thermally induced displacement of rock is not significant enough to trigger rock slope instability as the thermal strain remains in an elastic range. Nonetheless, there are multiple examples and observations that a number of rockslides were caused by continuous temperature changes. This work attempts to verify the perception that a repetitive temperature fluctuation can indeed invoke an accumulated slip between a rock slab and underlying rock slope, which may eventually lead to the rock slide. A numerical model of a thin rock slab sitting on a mild slope that is subjected to a repetitive fluctuation of temperature is simulated in this study, and it is shown that the slab gradually slides down with the number of temperature cycles. The described numerical simulation is validated via the comparison with laboratory experiments, which also showed the substantial accumulations of displacement as well as rockslides.
Numerical Study on Thermally-Induced Displacement Ratcheting of a Thin Rock Slab
Temperature fluctuation in nature, either daily or seasonal, is capable of inducing a cycle of volumetric expansion and contraction of materials that are exposed to such an environment. Natural- and cut-rock slopes are also likely to experience such a cyclic temperature fluctuation. In many cases, however, thermally induced displacement of rock is not significant enough to trigger rock slope instability as the thermal strain remains in an elastic range. Nonetheless, there are multiple examples and observations that a number of rockslides were caused by continuous temperature changes. This work attempts to verify the perception that a repetitive temperature fluctuation can indeed invoke an accumulated slip between a rock slab and underlying rock slope, which may eventually lead to the rock slide. A numerical model of a thin rock slab sitting on a mild slope that is subjected to a repetitive fluctuation of temperature is simulated in this study, and it is shown that the slab gradually slides down with the number of temperature cycles. The described numerical simulation is validated via the comparison with laboratory experiments, which also showed the substantial accumulations of displacement as well as rockslides.
Numerical Study on Thermally-Induced Displacement Ratcheting of a Thin Rock Slab
Kim, Sihyun (author) / Druszkowski, Ethan (author) / Zhang, Jingtao (author) / Kim, Seunghee (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 506-513
2019-03-21
Conference paper
Electronic Resource
English
Numerical Study on Thermally-Induced Displacement Ratcheting of a Thin Rock Slab
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