Simplified multi-block constitutive model predicting earthquake-induced landslide triggering and displacement along slip surfaces of saturated sand |
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| Institution: | 1. Stamatopoulos and Associates Co, 5 Isavron Street, Athens 11471, Greece;2. Hellenic Open University, 5 Isavron Street, Athens 11471, Greece;3. College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China;1. Department of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand;2. Cellular, Molecular and Microbial Biology Program, Division of Biological Sciences, The University of Montana, Missoula, MT, USA;3. Systems Ecology Program, Division of Biological Sciences, The University of Montana, Missoula, MT, USA;1. Institut für Geotechnik und Baubetrieb, Technische Universität Hamburg (TUHH), Harburger, D - 21079 Hamburg, Germany;2. Formerly Centre for Offshore Foundation Systems, University of Western Australia, Perth, WA, Australia;3. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, 238 Songling Street, Qingdao, 266100, China;4. Centre for Offshore Foundation Systems, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia;1. MSSMat, CNRS, CentraleSupélec, Paris-Saclay University, 92290 Châtenay-Malabry, France;2. Current institution: Department of Civil Engineering, Universidad EAFIT, Medellín, Colombia;1. DICEA – University of Padua, via Ognissanti 39, 35129 Padua, Italy;2. DICA – Politecnico di Milano, Pz. L. da Vinci 32, 20133 Milano, Italy |
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| Abstract: | Slopes consisting of saturated sand have recently moved down-slope tens or hundreds of meters under the action of earthquakes. This paper presents a simplified but accurate method predicting the triggering and displacement of such landslides. For this purpose, a simplified constitutive model simulating soil response of saturated sands along slip surfaces is proposed and validated. Then, this constitutive model is coupled with the multi-block sliding system model to predict the triggering and displacement of such slides. The multi-block model considers a general mass sliding on a trajectory which consists of n linear segments. The steps needed to apply this method are described in detail. The method was applied successfully to predict the triggering, the motion and the final configuration of the well-documented (a) Higashi Takezawa, (b) Donghekou and (c) Nikawa earthquake-induced slides. |
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| Keywords: | Seismic displacement Saturated sands Constitutive modeling Slopes Slip surfaces Multi-block model Sliding-block model Landslides |
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