contributor author | Tyler J. Oathes | |
contributor author | Ross W. Boulanger | |
date accessioned | 2023-08-16T19:04:25Z | |
date available | 2023-08-16T19:04:25Z | |
date issued | 2023/04/01 | |
identifier other | JGGEFK.GTENG-10984.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4292713 | |
description abstract | A numerical study is presented of the effects of viscoplasticity on localization processes in sensitive, saturated clays and plastic silts. Numerical simulations of laboratory specimens of sensitive, viscoplastic soil subjected to monotonic, undrained, direct simple shear loading were performed using a viscoplastic constitutive model. Parametric analyses evaluated the effects of soil sensitivity, postpeak strain-softening rate, and strain rate dependency, as well as specimen size, mesh discretization, and loading rate. The numerical results showed that the global strain at which a localization forms primarily depends on the strain rate dependency of the soil’s shearing resistance relative to its rate of postpeak strain softening. A regression model is subsequently presented that relates the global strain at the onset of localization to the soil’s strain rate dependency and postpeak strain-softening rate. The results indicate that the inclusion of reasonable levels of viscoplasticity significantly increases the strain that can develop before a localization develops in clays and plastic silts with modest strain-softening rates. The consistency of the numerical results with available laboratory observations is discussed. Implications for practice and future research needs are discussed. | |
publisher | American Society of Civil Engineers | |
title | Effect of Viscoplasticity on Localization in Saturated Clays and Plastic Silts | |
type | Journal Article | |
journal volume | 149 | |
journal issue | 4 | |
journal title | Journal of Geotechnical and Geoenvironmental Engineering | |
identifier doi | 10.1061/JGGEFK.GTENG-10984 | |
journal fristpage | 04023016-1 | |
journal lastpage | 04023016-15 | |
page | 15 | |
tree | Journal of Geotechnical and Geoenvironmental Engineering:;2023:;Volume ( 149 ):;issue: 004 | |
contenttype | Fulltext | |