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Analytical definition of collapse surface in multiaxial space as a criterion for flow liquefaction occurrence |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;1. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, SAR, China;2. Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China;1. Public Works Research Institute, 1-6 Minamihara, Tsukuba, Ibaraki 305-8516, Japan;2. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;3. Department of Civil and Environmental Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan;4. Department of Civil Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan |
| Abstract: | Prediction of flow liquefaction occurrence in multiaxial stress space is presented in this paper. The closed-form relation analytically attained by means of Dafalias-Manzari constitutive equations gives the flow stress ratio as a function of model parameters, state parameter, direction of undrained loading and especially initial condition of consolidation. These proposed flow condition can predict the occurrence of flow liquefaction initiated by any loadings whether the soil is consolidated isotropically or anisotropically. Suggested predictions are compared with the results of triaxial tests performed on Hostun RF sand. The results show that increasing consolidation stress ratio leads to flow stress ratio increase. |
| Keywords: | Flow liquefaction Multiaxial anisotropic consolidation Dafalias-Manzari constitutive model Collapse surface |
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