Numerical prediction of liquefied ground characteristics from back-analysis of lateral spreading centrifuge experiments |
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| Affiliation: | 1. Université de Tunis El Manar, Ecole Nationale d’Ingénieurs de Tunis, LGC, Tunisia;2. Université Paris-Est, Ecole Nationale des Ponts et Chaussées, UR Navier, France;1. Geotechnical Engineering Research Center, International Institute of Earthquake Engineering and Seismology, Tehran, Iran;2. Department of Civil Engineering, Semnan University, Semnan, Iran;3. Department of Civil Engineering, National Central University, Taiwan;1. Faculty of Environmental and Urban Engineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka, Japan;2. Graduate School of Engineering, Kyoto University, Japan;3. Disaster Prevention Research Institute, Kyoto University, Japan |
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| Abstract: | In this paper, liquefied and laterally spreading soils triggered by seismic shaking are modeled as viscoplastic Bingham media characterized by two rheological parameters: the undrained residual shear strength and the Bingham viscosity coefficient. Since the precise evaluation of these two characteristics directly by appropriate in situ or laboratory experimental tests remains a very difficult task, an identification procedure is developed to assign numerically realistic values to both rheological characteristics from back-calculation of liquefaction-induced lateral spreading using centrifuge experiments. The proposed numerical procedure is applied successfully to two series of reported centrifuge tests where lateral displacements data during shaking were available. |
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