Evaluation of state indices in predicting the cyclic and monotonic strength of sands with different fines contents |
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| Institution: | 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. Chair for Geotechnical Engineering, Bauhaus-Universität Weimar, Coudraystraße 11c, 99423, Weimar, Germany;2. Universidad del Norte, Barranquilla, Colombia;3. Institute of Soil Mechanics and Rock Mechanics, Karlsruhe Institute of Technology (KIT), Engler-Bunte-Ring 14, 76131, Karlsruhe, Germany;1. Department of Civil Engineering, Room B-418,Inonu Mah., Kayisdagi Cad., 26 Agustos Yerlesimi, Yeditepe University, 34755 Atasehir, Istanbul, Turkey;2. Department of Civil Engineering, Soil Mechanics Laboratory, Inonu Mah., Kayisdagi Cad., 26 Agustos Yerlesimi, Yeditepe University, 34755 Atasehir, Istanbul, Turkey;3. Department of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey;1. Karlsruhe Institute of Technology (KIT), Institute of Soil Mechanics and Rock Mechanics, Engler-Bunte-Ring 14, 76131 Karlsruhe, Germany;2. ITASCA, Dr. José Luis Aguilar 1178, Providencia, 7501360 Santiago, Chile;1. State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. Department of Civil Engineering, Nanjing University of Science and Technology, Nanjin, 210094, China;3. Department of Civil Engineering, Nagoya Institute of Technology, Nagoya, 4668555, Japan;1. LUNAM University, Ecole Centrale de Nantes, UMR CNRS GeM, Nantes, France;2. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, China;4. College of Civil Engineering, Tongji University, Shanghai, China |
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| Abstract: | State parameter, ψ, has been widely used to combine the influence of void ratio, e, and stress level, p′, on the soils behavior. Stress ratio, Rs, and modified state parameter, ψm, have also been proposed for the same purpose. This paper aims to evaluate and compare the different state indices in combining the effect of fines content, density and stress level for five different types of sands, by processing a large number of previously published experimental data. The use of the recently established concept of equivalent interparticle void ratio, e?, in definition of the state indices is also evaluated. The results indicate that the influence of fines presence, in addition to the e and p′, on the behavior is favorably reflected by the state indices. Unique correlations were derived between the cyclic or monotonic strength and each of the state indices, independent of the fines content. The correlations, for all the different types of soils, fell into limited types of common formulations. ψ and Rs worked generally better than ψm, whether defined in terms of e or e?. The extension of straight part of critical state line was found to be an appropriate reference line for calculating Rs used in conjunction with e or e?. |
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| Keywords: | Critical state State parameter Stress ratio Modified state parameter Equivalent intergranular/interfine void ratio Sand Fines content Cyclic resistance Monotonic strength |
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