Postcyclic behavior of low-plasticity silt with limited excess pore pressures |
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| Institution: | 1. School of Civil Engineering, Central South University, Associate Professor, Key Laboratory of Engineering Structure of Heavy Railway (Central South University), Ministry of Education, Changsha 410075, China;2. Department of Civil, Architectural and Environmental Engineering, Missouri University of Science & Technology, Rolla, MO 65409, USA;3. School of Civil Engineering, Central South University, Professor, Key Laboratory of Engineering Structure of Heavy Railway (Central South University), Ministry of Education, Changsha 410075, China;1. School of Civil Engineering, State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China;2. School of Civil Engineering, State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;3. Ertan Hydropower Development Company Limited, Chengdu 610051, China;1. Port and Airport Research Institute (PARI), 3-1-1 Nagase, Yokosuka, Kanagawa 239-0826, Japan;2. Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan;1. Department of Civil Engineering, Bu-Ali Sina University, Hamedan, Iran;2. Young Researchers and Elite Club, Nour branch, Islamic Azad University, Nour, Iran;1. Engineering Faculty, Department of Civil Engineering, Erciyes University, Turkey;2. Civil Engineering Faculty, Department of Civil Engineering, Istanbul Technical University, Turkey;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety and Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300072, People''s Republic of China;2. School of Civil Engineering, Tianjin University, College of Engineering, Ocean University of China, 135 Yaguan Road, Jinnan District, Tianjin 300072, People''s Republic of China |
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| Abstract: | This paper investigates the postcyclic behavior of low-plasticity silt with excess pore pressure ratio (Ru) less than 1. The testing specimens were prepared from Mississippi River Valley (MRV) silt. Full and no reconsolidation were allowed after specimens were subjected to various excess pore pressure ratios due to cyclic loading in a cyclic triaxial cell, and then monotonic shear tests were conducted. The effect of the Ru on shear strength and stiffness at small and large deformation was investigated. It was found that a Ru greater than 0.70 is a prerequisite of large increase in volumetric strain and undrained shear strength for specimens with full reconsolidation. In contrast, a significant decrease in yield shear strength and initial stiffness was noted for specimens without reconsolidation. In comparison to published data for sands, the silt experienced significant volumetric strain due to reconsolidation at lower Ru, indicating that the specimen fabric was modified or strained at lower Ru. |
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| Keywords: | Postcyclic behavior Liquefaction Limited pore pressure ratio Reconsolidation Cyclic loading Low-plasticity silt |
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