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Back analysis of displacements for estimating spatial distribution of viscoelastic properties around an unlined rock cavern
https://orcid.org/0000-0002-7260-0772
Abstract A displacement back analysis algorithm is developed, considering the time-dependent effect of the rock mass. It can map spatially distributed the first elastic modulus (), viscidity coefficient (), and the second elastic modulus () of the Kelvin-Voigt viscoelastic constitutive model (VCM) and the Poynting-Thomson VCM in a rock mass by fusion of the observed displacement data from the excavation of an unlined rock cavern. The algorithm is tested and validated using numerical experiments with a synthetic heterogeneous rock mass. The results of the experiments show that this approach yields unbiased estimates of , , and fields and quantifies their uncertainty. Further, the estimated fields closely predict shear strain distribution and displacements field in the example.
Back analysis of displacements for estimating spatial distribution of viscoelastic properties around an unlined rock cavern
https://orcid.org/0000-0002-7260-0772
Abstract A displacement back analysis algorithm is developed, considering the time-dependent effect of the rock mass. It can map spatially distributed the first elastic modulus (), viscidity coefficient (), and the second elastic modulus () of the Kelvin-Voigt viscoelastic constitutive model (VCM) and the Poynting-Thomson VCM in a rock mass by fusion of the observed displacement data from the excavation of an unlined rock cavern. The algorithm is tested and validated using numerical experiments with a synthetic heterogeneous rock mass. The results of the experiments show that this approach yields unbiased estimates of , , and fields and quantifies their uncertainty. Further, the estimated fields closely predict shear strain distribution and displacements field in the example.
Back analysis of displacements for estimating spatial distribution of viscoelastic properties around an unlined rock cavern
https://orcid.org/0000-0002-7260-0772
Abstract A displacement back analysis algorithm is developed, considering the time-dependent effect of the rock mass. It can map spatially distributed the first elastic modulus (), viscidity coefficient (), and the second elastic modulus () of the Kelvin-Voigt viscoelastic constitutive model (VCM) and the Poynting-Thomson VCM in a rock mass by fusion of the observed displacement data from the excavation of an unlined rock cavern. The algorithm is tested and validated using numerical experiments with a synthetic heterogeneous rock mass. The results of the experiments show that this approach yields unbiased estimates of , , and fields and quantifies their uncertainty. Further, the estimated fields closely predict shear strain distribution and displacements field in the example.
Back analysis of displacements for estimating spatial distribution of viscoelastic properties around an unlined rock cavern
Gao, Xu (author) / Yan, E-Chuan (author) / Yeh, Tian-Chyi Jim (author) / Yin, Xiao-Meng (author) / Cai, Jing-Sen (author) / Hao, Yong-Hong (author) / Wen, Jet-Chau (author)
2020-06-26
Article (Journal)
Electronic Resource
English
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Strains and stresses in the rock around and unlined hot water cavern
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| British Library Online Contents | 2018